CN112798970A - Remote capacity checking system for storage battery of transformer substation - Google Patents
Remote capacity checking system for storage battery of transformer substation Download PDFInfo
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- 230000002159 abnormal effect Effects 0.000 claims abstract description 13
- 238000012360 testing method Methods 0.000 claims abstract description 11
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- 238000007599 discharging Methods 0.000 claims description 36
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/385—Arrangements for measuring battery or accumulator variables
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00001—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
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Abstract
The invention relates to a remote capacity checking system for a storage battery of a transformer substation, which comprises a remote monitoring device and a station end device which are in communication connection, wherein the station end device comprises a communication and human-computer interaction device, a data processing and control device, a data acquisition device and an execution device which are in signal connection with each other; the remote monitoring equipment and the communication and man-machine interaction equipment are provided with a medium encryption function; the communication and man-machine interaction equipment is used for carrying out data interaction with the remote monitoring equipment and providing man-machine interaction; the data processing and control equipment is used for processing data and sending out a control signal, and when the logic relation of the control signal is abnormal, the data processing and control equipment uploads an interlocking prompt; the data acquisition equipment is used for acquiring data signals of the execution equipment and uploading the data signals to the data processing and control equipment; the execution equipment is used for receiving the control signal and executing the kernel capacity test, and the execution equipment refuses to operate when the logic relation of the control signal is abnormal. The invention has higher safety and can ensure that the remote core capacity is smoothly and safely implemented.
Description
Technical Field
The invention relates to the technical field of automatic control, in particular to the technical field of storage battery maintenance, and particularly relates to a remote capacity checking system for a storage battery of a transformer substation.
Background
The technology of remote capacity checking of the storage battery of the transformer substation is developed in order to solve the problems that the field capacity checking operation is heavy in task, large in workload and high in labor intensity, and the working quality cannot be guaranteed due to the fact that the capacity checking is acknowledged to be the most effective means for detecting the power supply capacity of the storage battery.
The existing remote automatic charging and discharging technology mainly comprises three types of off-line type, on-line type and integrated type, wherein the off-line type completely separates a storage battery pack from a direct current bus through each electric control switch for discharging, and the scheme can really realize 100% of full nuclear capacity. In a 220kV substation and an important 110kV substation, a station direct current system generally adopts a configuration of two accumulators and two chargers (two groups of accumulators are matched with two sets of chargers). Under the configuration, the implementation of the off-line automatic charging and discharging technology is easier to realize, and the modification cost is lower. The main technical difficulty of the scheme is how to ensure the reliability of the operation of the electric control switch under the unattended condition in the nuclear capacity discharge test process, and avoid accidents such as short circuit, voltage loss and the like of a direct current system.
The current remote storage battery capacity checking technology is generally used for solving the problem of heavy work during manual capacity checking, and further, in unattended operation, the safety problem is solved by adopting a single-channel protection type design, the criterion is simple, namely whether the system state is normal after operation, whether the current state is normal or not and whether the next operation can be executed or not are judged by judging whether the system state is out of limit or not and whether the switch state is consistent with the expected state or not through the fact that the system voltage and the current are out of limit, and a strategy of stopping discharging is adopted when a fault occurs. This solution has low reliability and the processing method is too simple, and in fact, the system safety cannot be guaranteed.
Disclosure of Invention
The invention provides a transformer substation storage battery remote capacity checking system aiming at the technical problems in the prior art, which has higher safety and can ensure that the remote capacity checking can be smoothly and safely implemented.
The technical scheme for solving the technical problems is as follows:
a remote capacity checking system for a storage battery of a transformer substation comprises a remote monitoring device and a station end device which are in communication connection, wherein the station end device comprises a communication and human-computer interaction device, a data processing and control device, a data acquisition device and an execution device which are in signal connection with each other; the remote monitoring equipment and the communication and man-machine interaction equipment are respectively provided with a medium encryption function;
the communication and human-computer interaction equipment is in signal connection with the far-end monitoring equipment and is used for carrying out data interaction with the far-end monitoring equipment and providing human-computer interaction;
the data processing and control equipment is in signal connection with the communication and man-machine interaction equipment and is used for processing data and sending out control signals, and when the logic relation of the control signals is abnormal, the data processing and control equipment uploads an interlocking prompt;
the data acquisition equipment is in signal connection with the data processing and control equipment and the execution equipment respectively, and is used for acquiring data signals of the execution equipment and uploading the data signals to the data processing and control equipment;
the execution equipment is in signal connection with the data processing and control equipment and is used for receiving the control signal and executing the kernel-capacity test, and the execution equipment refuses to operate when the logic relation of the control signal is abnormal.
On the basis of the technical scheme, the invention can be further improved as follows.
Furthermore, the execution equipment comprises a plurality of electric control switches, and the data processing and control equipment sends out control signals to control the switching of the plurality of electric control switches, so that the two groups of direct current buses are switched on, the tested storage battery is separated from the direct current buses, the discharging load is started and stopped to finish discharging, the charger is connected with the storage battery to finish charging, the storage battery is connected with the direct current buses, and the two groups of direct current buses are disconnected.
Further, the electric control switch comprises an electric control switch ZK1, an electric control switch ZK11, an electric control switch ZK12, an electric control switch ZK13, an electric control switch ZK14, an electric control switch ZK21, an electric control switch ZK22, an electric control switch ZK23 and an electric control switch ZK24, two groups of direct current buses are connected through an electric control switch ZK1, two groups of direct current buses are respectively connected with a first charger and a second charger through an electric control switch ZK11 and an electric control switch ZK21, two groups of direct current buses are respectively connected with a first storage battery and a second storage battery through an electric control switch ZK12 and an electric control switch ZK22, the first charger is connected with the first storage battery through an electric control switch ZK13, the second charger is connected with the second storage battery through an electric control switch ZK23, and the first storage battery and the second storage battery are respectively connected with an electric control switch ZK24 through an electric control switch ZK 14.
Further, the electric control switch further comprises an electric control switch ZK2 and an electric control switch JK1, the electric control switch ZK2 is arranged at a current input end of the discharging load, and a current output end of the discharging load is connected with a power grid through the electric control switch JK 1.
Further, the logic relation among the closing control output A of the data processing and control equipment to the electric control switch ZK11, the state B of the electric control switch ZK13 and the input C of the final closing control end of the electric control switch ZK11 is that
The logic relation among the closing control output A of the data processing and control equipment to the electric control switch ZK13, the state B of the electric control switch ZK11 and the input C at the closing control end of the electric control switch ZK13 is
Further, the data processing and control equipment outputs A for controlling the closing of the electric control switch ZK21, the state B of the electric control switch ZK23 and finally controls the closing of the electric control switch ZK21The logical relationship of input C of the system end is
The logic relation among the closing control output A of the data processing and control equipment to the electric control switch ZK23, the state B of the electric control switch ZK21 and the input C at the closing control end of the electric control switch ZK23 is
Further, the logic relation among the opening control output A of the electric control switch ZK12, the state B of the electric control switch ZK22 and the input C at the opening control end of the electric control switch ZK12 by the data processing and control equipment is C-A.B; the logic relationship of the data processing and control equipment to the opening control output A of the electric control switch ZK22, the state B of the electric control switch ZK12 and the input C at the opening control end of the electric control switch ZK22 is C-A.B.
Further, the logic relation among the opening control output A of the electric control switch ZK11, the state B of the electric control switch ZK21 and the input C at the opening control end of the electric control switch ZK11 by the data processing and control equipment is C-A.B; the logic relationship of the data processing and control equipment to the opening control output A of the electric control switch ZK21, the state B of the electric control switch ZK11 and the input C at the opening control end of the electric control switch ZK21 is C-A.B.
Further, the logic relation among the opening control output A of the data processing and control equipment to the electric control switch ZK11, the state of the electric control switch ZK1 as B and the input C at the opening control end of the electric control switch ZK11 is C-A.B; the data processing and control equipment outputs A for opening control of the electric control switch ZK12, the state of the electric control switch ZK1 is B, and the logic relationship of C input at the opening control end of the electric control switch ZK12 is C-A.B; the data processing and control equipment outputs A for opening control of the electric control switch ZK21, the state of the electric control switch ZK1 is B, and the logic relationship of C input at the opening control end of the electric control switch ZK21 is C-A.B; the data processing and control equipment outputs A to the opening control of the electric control switch ZK22, the state of the electric control switch ZK1 is B, and the logic relation of the input C at the opening control end of the electric control switch ZK22 is C-A.B.
Further, the logical relation among the opening control output A of the electric control switch ZK14, the state B of the electric control switch ZK24 and the input C at the opening control end of the electric control switch ZK14 by the data processing and control equipment is that
The logical relationship among the opening control output A of the data processing and control equipment to the electric control switch ZK24, the state B of the electric control switch ZK14 and the input C at the opening control end of the electric control switch ZK24 is as follows
The invention has the beneficial effects that: 1. and (3) system safety: the network of the remote kernel-volume device is encrypted by a security medium, all operating personnel are identified and recorded, and meanwhile, manual intervention is supported for station entry maintenance, so that the security of equipment is guaranteed;
2. an interlocking mechanism: hardware and software interlocking, and giving multi-layer protection to the system; and particularly, hardware interlocking effectively avoids system faults when software fails. When complex faults occur, manual intervention is needed to support remote operation, and the interlocking of hardware and software can protect system faults of equipment caused by misoperation;
3. an exit mechanism: when the remote nuclear capacity device carries out nuclear capacity discharge, no matter the discharge is finished or the discharge is abnormal, the remote nuclear capacity device automatically exits, charges and restores, and the safety of the direct current system is guaranteed. And when the system is powered down, the connection with the discharging device is automatically disconnected, the site is kept, and the fault is not expanded to the maximum extent.
Drawings
FIG. 1 is a schematic structural diagram of a remote battery capacity checking system according to the present invention;
FIG. 2 is a block diagram of the DC system of the present invention;
FIG. 3 is a schematic diagram of a system according to an embodiment of the present invention.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
The transformer substation storage battery remote capacity checking system shown in fig. 1 comprises a remote monitoring device and a station end device which are in communication connection, wherein the station end device comprises a communication and human-computer interaction device, a data processing and control device, a data acquisition device and an execution device which are in signal connection with each other; the remote monitoring equipment and the communication and man-machine interaction equipment are respectively provided with a medium encryption function;
the communication and human-computer interaction equipment is in signal connection with the far-end monitoring equipment and is used for carrying out data interaction with the far-end monitoring equipment and providing human-computer interaction;
the data processing and control equipment is in signal connection with the communication and man-machine interaction equipment and is used for processing data and sending out control signals, and when the logic relation of the control signals is abnormal, the data processing and control equipment uploads an interlocking prompt;
the data acquisition equipment is in signal connection with the data processing and control equipment and the execution equipment respectively, and is used for acquiring data signals of the execution equipment and uploading the data signals to the data processing and control equipment;
the execution equipment is in signal connection with the data processing and control equipment and is used for receiving the control signal and executing the kernel-capacity test, and the execution equipment refuses to operate when the logic relation of the control signal is abnormal.
As shown in fig. 1, the remote kernel content system is divided into a remote device and a station-side device, where the remote device includes a remote monitoring platform, and generally one remote kernel content system is arranged in one area, and the remote kernel content system has a main function of monitoring all the remote kernel content systems of the dc system in the area through the ethernet, checking the working condition of the station-side device, and initiating and terminating a remote kernel content command.
The station-side equipment comprises communication and human-computer interaction equipment, data processing and control equipment, data acquisition equipment and execution equipment. The communication and man-machine interaction equipment receives and displays the data of the data processing and control equipment, receives the command of the remote equipment and sends the command to the data processing and control equipment. And the data processing and control equipment receives the system real-time data uploaded by the data acquisition equipment, alarms and uploads the data after processing, performs a capacity checking test when receiving a capacity checking command of the communication and man-machine interaction equipment, and controls the execution equipment to complete the capacity checking test according to the current state. The data acquisition equipment is responsible for acquiring and uploading real-time information of the system. The execution equipment generally refers to an electric control switch, and each electric control switch is switched on and off after receiving the control signal, so that the storage battery is controlled to discharge to a discharge load, and a nuclear capacity test is performed.
In this embodiment, the execution device includes a plurality of electrical control switches, and the data processing and control device sends a control signal to control the switching of the plurality of electrical control switches, so as to sequentially implement switching on two sets of dc buses, separating the measured storage battery from the dc buses, completing discharging when a discharging load is started and stopped, completing charging by connecting the charger to the storage battery, connecting the storage battery to the dc buses, and disconnecting the two sets of dc buses.
The remote equipment has a security authentication medium encryption function, can operate the station end equipment only after passing the security authentication medium authentication, and only allows to check the station end equipment data when the security authentication medium does not exist or passes the security authentication medium authentication; the communication and human-computer interaction equipment has a security authentication medium encryption function, can be operated only after passing the security authentication medium authentication, and only allows the data of the station-side equipment to be checked when the security authentication medium does not exist or passes the security authentication medium authentication; all operations require personnel checks and are recorded in a database.
As shown in fig. 3, the remote monitoring device in this embodiment is a monitoring platform host, which is installed in a management center; and station end equipment such as a station end monitoring host and the like are arranged in the transformer substation. The monitoring platform host is networked with a plurality of station end monitoring hosts through the Ethernet to form a storage battery monitoring platform. The communication and man-machine interaction device is integrated on a station end monitoring host, the data processing and control device corresponds to the centralized processor of the embodiment, the data acquisition device comprises a comprehensive acquisition device and a storage battery acquisition device, the discharge load of the embodiment is a discharge inverter, and the output end of the discharge inverter is connected to a power grid.
The station end monitoring host comprises an LCD (liquid crystal display) and an ARM host, and the ARM host is communicated with the centralized processor through RS 232. The centralized processor uses STM32F103VET6 of Cortex-M3 kernel as a main control chip, and is provided with one path of RS232 to communicate with a station end monitoring host, one path of RS485 to communicate with a comprehensive collector and a storage battery collector, and one path of RS485 to communicate with a discharging inverter, and is provided with a plurality of output contacts and input contacts to monitor each electric control switch.
The comprehensive collector collects the charger load current and the bus voltage of two sections of direct current buses, and the charger input alternating current voltage and uploads the alternating current voltage through RS 485. The storage battery collector collects the terminal voltage and current of the storage battery pack, and the voltage, temperature and internal resistance of each battery and uploads the voltage, temperature and internal resistance through RS 485.
In this embodiment, as shown in fig. 2, two segments of dc buses, a charger, and a storage battery are original devices of a substation. The electric control switch comprises an electric control switch ZK1, an electric control switch ZK11, an electric control switch ZK12, an electric control switch ZK13, an electric control switch ZK14, an electric control switch ZK21, an electric control switch ZK22, an electric control switch ZK23 and an electric control switch ZK24, two groups of direct current buses are connected through an electric control switch ZK1, two groups of direct current buses are respectively connected with a first charger and a second charger through an electric control switch ZK11 and an electric control switch ZK21, two groups of direct current buses are respectively connected with a first storage battery and a second storage battery through an electric control switch ZK12 and an electric control switch ZK22, the first charger is connected with the first storage battery through an electric control switch ZK13, the second charger is connected with the second storage battery through an electric control switch ZK23, and the first storage battery and the second storage battery are respectively connected with an electric control switch ZK24 through an electric control switch ZK14 to. The electric control switch further comprises an electric control switch ZK2 and an electric control switch JK1, the electric control switch ZK2 is arranged at the current input end of the discharging load, and the current output end of the discharging load is connected with the power grid through the electric control switch JK 1. The electric control switch ZK11, the electric control switch ZK12, the electric control switch ZK13, the electric control switch ZK14, the electric control switch ZK1, the electric control switch ZK21, the electric control switch ZK22, the electric control switch ZK23 and the electric control switch ZK24 are air switches with electric operating mechanisms and are provided with a plurality of auxiliary contacts, the closing and the opening of the air switches are respectively controlled, and the switch state is maintained when power is lost. When a short-time short-circuit signal is input at two ends of the control input of the electric operating mechanism in the electric control switch, the electric operating mechanism executes corresponding switching-on and switching-off operations so as to realize the switching-on and switching-off of the corresponding electric control switch. The electric control switch ZK2 is a direct current contactor, the electric control switch JK1 is an alternating current contactor, and the switch is automatically disconnected when the power is off. The discharging inverter converts the direct current of the storage battery into alternating current through DC/AC in the discharging process and feeds the alternating current back to the power grid.
In order to reduce the volume of equipment, facilitate centralized management and enhance safety, the station end monitoring host, the centralized processor, the comprehensive collector and the electric control switch are arranged in the direct current cabinet. The storage battery collector is arranged beside the storage battery pack, and one storage battery collector is arranged on each group of storage batteries.
The control authority and the modification parameters of the monitoring platform host need to be authenticated by inserting a dongle, and then face recognition is carried out, so that the authority is opened, and all operations of all equipment are recorded in a database and can be checked.
And the station side monitors the control authority of the host, modifies parameters and the like, and opens the authority after the control authority, the parameters and the like are authenticated by inserting the dongle.
In this embodiment, the switching-on control output contact of the electronic control switch ZK13 of the centralized processor is connected in series with the normally closed auxiliary contact of the electronic control switch ZK11, and then is connected to the switching-on control input contact of the electronic control switch ZK 13. The logic relation among the closing control output A of the data processing and control equipment to the electric control switch ZK11, the state B of the electric control switch ZK13 and the input C at the closing control end of the electric control switch ZK11 is
The logic relation among the closing control output A of the data processing and control equipment to the electric control switch ZK13, the state B of the electric control switch ZK11 and the input C at the closing control end of the electric control switch ZK13 is
In this embodiment, the switching-on control output contact of the electronic control switch ZK23 of the centralized processor is connected in series with the normally closed auxiliary contact of the electronic control switch ZK21 and then connected to the switching-on control input contact of the electronic control switch ZK 23. The logic relation among the closing control output A of the data processing and control equipment to the electric control switch ZK21, the state B of the electric control switch ZK23 and the input C at the closing control end of the electric control switch ZK21 is
The logic relation among the closing control output A of the data processing and control equipment to the electric control switch ZK23, the state B of the electric control switch ZK21 and the input C at the closing control end of the electric control switch ZK23 is
In this embodiment, the opening output contact of the electric control switch ZK12, the normally open auxiliary contact of the electric control switch ZK22, and the normally open auxiliary contact of the electric control switch ZK1 of the central processor are connected in series and then connected to the opening control input contact of the electric control switch ZK 12. The logic relation of the switching-off control output A of the data processing and control equipment to the electric control switch ZK12, the state B of the electric control switch ZK22 and the input C at the switching-off control end of the electric control switch ZK12 is C-A-B; the logic relationship of the data processing and control equipment to the opening control output A of the electric control switch ZK22, the state B of the electric control switch ZK12 and the input C at the opening control end of the electric control switch ZK22 is C-A.B.
In this embodiment, the opening output contact of the electric control switch ZK11, the normally open auxiliary contact of the electric control switch ZK21, and the normally open auxiliary contact of the electric control switch ZK1 of the central processor are connected in series and then connected to the opening control input contact of the electric control switch ZK 11. The switching-on output contact of an electric control switch ZK11 of the centralized processor is connected with the normally closed auxiliary contact of an electric control switch ZK13 in series and then is connected with the switching-on control input contact of an electric control switch ZK 11. The logic relation of the switching-off control output A of the data processing and control equipment to the electric control switch ZK11, the state B of the electric control switch ZK21 and the input C at the switching-off control end of the electric control switch ZK11 is C-A-B; the logic relationship of the data processing and control equipment to the opening control output A of the electric control switch ZK21, the state B of the electric control switch ZK11 and the input C at the opening control end of the electric control switch ZK21 is C-A.B.
In this embodiment, the opening control output contact of the electronic control switch ZK1 of the centralized processor is connected in series with the normally open auxiliary contact of the electronic control switch ZK11, the normally open auxiliary contact of the electronic control switch ZK12, the normally open auxiliary contact of the electronic control switch ZK21, and the normally open auxiliary contact of the electronic control switch ZK22, and then connected with the opening control input contact of the electronic control switch ZK 1. The ZK21 opening output contact of the centralized processor, the normally open auxiliary contact of the electric control switch ZK11 and the normally open auxiliary contact of the electric control switch ZK1 are connected in series and then connected with the opening control input contact of the electric control switch ZK 21. The switching-on output contact of an electric control switch ZK21 of the centralized processor is connected with the normally closed auxiliary contact of an electric control switch ZK23 in series and then is connected with the switching-on control input contact of an electric control switch ZK 21. An electric control switch ZK22 opening output contact of the centralized processor, a normally open auxiliary contact of the electric control switch ZK12 and a normally open auxiliary contact of the electric control switch ZK1 are connected in series and then connected with an opening control input contact of the electric control switch ZK 22.
The data processing and control equipment outputs A for opening control of the electric control switch ZK11, the state of the electric control switch ZK1 is B, and the logic relationship of C input at the opening control end of the electric control switch ZK11 is C-A.B; the data processing and control equipment outputs A for opening control of the electric control switch ZK12, the state of the electric control switch ZK1 is B, and the logic relationship of C input at the opening control end of the electric control switch ZK12 is C-A.B; the data processing and control equipment outputs A for opening control of the electric control switch ZK21, the state of the electric control switch ZK1 is B, and the logic relationship of C input at the opening control end of the electric control switch ZK21 is C-A.B; the data processing and control equipment outputs A to the opening control of the electric control switch ZK22, the state of the electric control switch ZK1 is B, and the logic relation of the input C at the opening control end of the electric control switch ZK22 is C-A.B.
In this embodiment, the ZK14 switching control output contact of the central processor is normally closed with the ZK24The auxiliary contact is connected in series and then is connected to an input contact of the electric control switch ZK14 for closing control; the switching-on control output contact of an electric control switch ZK24 of the centralized processor is connected with the normally closed auxiliary contact of an electric control switch ZK14 in series and then is connected with the switching-on control input contact of an electric control switch ZK 24. The logical relationship among the opening control output A of the data processing and control equipment to the electric control switch ZK14, the state B of the electric control switch ZK24 and the input C at the opening control end of the electric control switch ZK14 is as follows
The logical relationship among the opening control output A of the data processing and control equipment to the electric control switch ZK24, the state B of the electric control switch ZK14 and the input C at the opening control end of the electric control switch ZK24 is as follows
When the remote nuclear capacity device of this embodiment performs nuclear capacity discharge, taking a group of batteries on the bus 1 in fig. 2 as an example, the specific flow is as follows: and an electric control switch ZK1 (namely a bus coupler switch) is switched on, and two sections of direct current buses are connected in parallel for operation. Then, the electric control switch ZK11 is switched off, the charger is disconnected with the direct current bus, the electric control switch ZK12 is switched off, the storage battery is disconnected with the direct current bus, the electric control switch ZK14 is switched on, the electric control switch JK1 is switched on, the electric control switch ZK2 is switched on, the discharging load is connected to the storage battery, and the discharging load is started (the discharging inverter is switched on). When a certain state of the storage battery reaches a set value, including the voltage of the battery pack, the voltage of a single battery, the discharge capacity, the discharge time and the like, the discharge load is stopped (the discharge inverter is closed), the electric control switch ZK14, the electric control switch JK1 and the electric control switch ZK2 are switched off, the storage battery and the discharge load are disconnected, and the discharge is finished. After the discharging is finished, the storage battery is in a power-deficient state, and should be charged and restored to a normal working state. And (4) switching on the electric control switch ZK13, connecting a first charger to the storage battery, and automatically completing charging by the first charger according to the sequence of uniform charging and floating charging. According to the charging voltage and the charging current, after the charging is judged to be finished, the electric control switch ZK13 is switched off, the electric control switch ZK12 is switched on, and the electric control switch ZK11 is switched on, the electric control switch ZK1 is switched off, the storage battery and the first charger are connected to the buses, the two buses are disconnected, the whole system is restored to a normal working state, and the whole nuclear capacity test is finished.
When the remote nuclear capacity device of the embodiment performs nuclear capacity discharge and during discharge, if AC power loss is abnormal, the electric control switch JK1 automatically opens the brake, the discharge load stops discharging, and the current capacity of the storage battery is guaranteed. If the communication between the station end monitoring host and the monitoring platform host is abnormal, the station end monitoring host issues a discharging stopping instruction, the centralized processor stops discharging according to the flow and then switches to charging, and the system is restored. And if the station side monitoring host and the centralized processor are abnormally communicated, the centralized processor automatically stops discharging according to the flow and then switches to charge, and if maintenance personnel arrive at the station for maintenance, all the electric control switches can be switched to a manual mode for maintenance. After the communication is recovered to be normal, after the communication is verified through the safety medium of the monitoring platform host, the manual remote control electric control switch is selected to complete the field recovery.
The logic limitation of the embodiment is realized by double interlocking of hardware and software, and the interlocking and the discharging process exist simultaneously; when the situation of causing the interlocking work occurs, the switch control fails, and the data processing and control equipment uploads an interlocking prompt and refuses to operate; the logic limitation only works when the electric control is carried out, and the switch is directly operated manually at the station end, so that the logic is not limited.
When the data processing and control equipment is powered off or forcibly restarted, the electric control switch ZK2 and the electric control switch JK1 are automatically switched off, so that the discharging load can automatically stop working; particularly, the discharge load is an electronic load, a control circuit of the discharge load supplies power to alternating current, and the discharge load stops working when the alternating current is cut off; therefore, the three-section protection mechanism can ensure that the storage battery can return to the standby power operation in time when the alternating current fails in the discharging process, and can also ensure that the storage battery is over-discharged due to system errors after the storage battery recovers from the failure.
The remote nuclear capacity device of the embodiment simulates a manual nuclear capacity test mode to perform the remote nuclear capacity test, automatically switches to charging after discharging is completed, and then is put into operation after charging is completed.
If the remote capacity checking device of the embodiment is abnormal in the discharging process, the next operation is carried out according to a corresponding processing method, an alarm is given, and if faults such as far-end communication abnormality, near-end communication abnormality, alternating current power loss and the like occur, the remote capacity checking device completes automatic control until the storage battery is finally put into the bus to normally work and operate. If the abnormity such as switch control failure occurs, the remote nuclear capacity device keeps the current situation after stopping discharging, and gives an alarm until the operation and maintenance personnel finish the recovery operation, and stops giving an alarm after the storage battery is normally put into operation.
The embodiment has the following advantages:
1. and (3) system safety: the network of the remote kernel and container device is encrypted by a security medium, all operating personnel are identified and recorded, and meanwhile, manual intervention is supported for station entry maintenance, so that the safety of equipment is guaranteed.
2. An interlocking mechanism: hardware and software interlocking, and giving multi-layer protection to the system; and particularly, hardware interlocking effectively avoids system faults when software fails. When complex faults occur, manual intervention is needed to support remote operation, and system faults caused by misoperation of equipment can be protected through interlocking of hardware and software.
3. An exit mechanism: when the remote nuclear capacity device carries out nuclear capacity discharge, no matter the discharge is finished or the discharge is abnormal, the remote nuclear capacity device automatically exits, charges and restores, and the safety of the direct current system is guaranteed. And when the system is powered down, the connection with the discharging device is automatically disconnected, the site is kept, and the fault is not expanded to the maximum extent.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A remote capacity checking system for a storage battery of a transformer substation is characterized by comprising a remote monitoring device and a station end device which are in communication connection, wherein the station end device comprises a communication and human-computer interaction device, a data processing and control device, a data acquisition device and an execution device which are in signal connection with each other; the remote monitoring equipment and the communication and man-machine interaction equipment are respectively provided with a medium encryption function;
the communication and human-computer interaction equipment is in signal connection with the far-end monitoring equipment and is used for carrying out data interaction with the far-end monitoring equipment and providing human-computer interaction;
the data processing and control equipment is in signal connection with the communication and man-machine interaction equipment and is used for processing data and sending out control signals, and when the logic relation of the control signals is abnormal, the data processing and control equipment uploads an interlocking prompt;
the data acquisition equipment is in signal connection with the data processing and control equipment and the execution equipment respectively, and is used for acquiring data signals of the execution equipment and uploading the data signals to the data processing and control equipment;
the execution equipment is in signal connection with the data processing and control equipment and is used for receiving the control signal and executing the kernel-capacity test, and the execution equipment refuses to operate when the logic relation of the control signal is abnormal.
2. The substation storage battery remote nuclear capacity system according to claim 1, wherein the execution device comprises a plurality of electric control switches, and the data processing and control device sends out a control signal to control the switching of the plurality of electric control switches, so as to sequentially switch on two sets of direct current buses, separate the tested storage battery from the direct current buses, complete discharging when a discharging load is started or stopped, complete charging when a charger is connected with the storage battery, connect the storage battery with the direct current buses, and disconnect the two sets of direct current buses.
3. The substation storage battery remote capacity check system according to claim 2, the electric control switch comprises an electric control switch ZK1, an electric control switch ZK11, an electric control switch ZK12, an electric control switch ZK13, an electric control switch ZK14, an electric control switch ZK21, an electric control switch ZK22, an electric control switch ZK23 and an electric control switch ZK24, two groups of direct current buses are connected through an electric control switch ZK1, the two groups of direct current buses are respectively connected with a first charger and a second charger through the electric control switch ZK11 and the electric control switch ZK21, the two groups of direct current buses are respectively connected with a first storage battery and a second storage battery through the electric control switch ZK12 and the electric control switch ZK22, the first charger is connected with the first storage battery through an electric control switch ZK13, the second charger is connected with the second storage battery through an electric control switch ZK23, the first storage battery and the second storage battery are respectively connected with a discharging load through an electric control switch ZK14 and an electric control switch ZK 24.
4. The substation storage battery remote nuclear capacity system of claim 3, wherein the electronic control switch further comprises an electronic control switch ZK2 and an electronic control switch JK1, the electronic control switch ZK2 is arranged at a current input end of the discharging load, and a current output end of the discharging load is connected with a power grid through the electronic control switch JK 1.
5. The substation storage battery remote nuclear capacity system according to claim 3, wherein the logic relationship among the closing control output A of the data processing and control device to the electronically controlled switch ZK11, the state B of the electronically controlled switch ZK13 and the input C at the closing control end of the electronically controlled switch ZK11 is
The logic relation among the closing control output A of the data processing and control equipment to the electric control switch ZK13, the state B of the electric control switch ZK11 and the input C at the closing control end of the electric control switch ZK13 is
6. The substation storage battery remote nuclear capacity system according to claim 3, wherein the logic relationship among the closing control output A of the data processing and control device to the electronically controlled switch ZK21, the state B of the electronically controlled switch ZK23 and the input C at the closing control end of the electronically controlled switch ZK21 is
The logic relation among the closing control output A of the data processing and control equipment to the electric control switch ZK23, the state B of the electric control switch ZK21 and the input C at the closing control end of the electric control switch ZK23 is
7. The substation storage battery remote nuclear capacity system according to claim 3, wherein the logic relationship of the data processing and control equipment to the opening control output A of the electric control switch ZK12, the state B of the electric control switch ZK22 and finally the input C at the opening control end of the electric control switch ZK12 is C-A-B; the logic relationship of the data processing and control equipment to the opening control output A of the electric control switch ZK22, the state B of the electric control switch ZK12 and the input C at the opening control end of the electric control switch ZK22 is C-A.B.
8. The substation storage battery remote nuclear capacity system according to claim 3, wherein the logic relationship of the data processing and control equipment to the opening control output A of the electric control switch ZK11, the state B of the electric control switch ZK21 and finally the input C at the opening control end of the electric control switch ZK11 is C-A-B; the logic relationship of the data processing and control equipment to the opening control output A of the electric control switch ZK21, the state B of the electric control switch ZK11 and the input C at the opening control end of the electric control switch ZK21 is C-A.B.
9. The substation storage battery remote nuclear capacity system according to claim 3, wherein the logic relationship among the opening control output A of the electric control switch ZK11, the state of the electric control switch ZK1 and the input C at the opening control end of the electric control switch ZK11 is C-A-B; the data processing and control equipment outputs A for opening control of the electric control switch ZK12, the state of the electric control switch ZK1 is B, and the logic relationship of C input at the opening control end of the electric control switch ZK12 is C-A.B; the data processing and control equipment outputs A for opening control of the electric control switch ZK21, the state of the electric control switch ZK1 is B, and the logic relationship of C input at the opening control end of the electric control switch ZK21 is C-A.B; the data processing and control equipment outputs A to the opening control of the electric control switch ZK22, the state of the electric control switch ZK1 is B, and the logic relation of the input C at the opening control end of the electric control switch ZK22 is C-A.B.
10. The substation storage battery remote nuclear capacity system of claim 3, wherein the logical relationship among the opening control output A of the data processing and control equipment to the electrically controlled switch ZK14, the state B of the electrically controlled switch ZK24 and the input C at the opening control end of the electrically controlled switch ZK14 is
The logical relationship among the opening control output A of the data processing and control equipment to the electric control switch ZK24, the state B of the electric control switch ZK14 and the input C at the opening control end of the electric control switch ZK24 is as follows
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