WO2010075690A1

WO2010075690A1 - Electronic switch control module of nuclear power plant

Info

Publication number: WO2010075690A1
Application number: PCT/CN2009/073389
Authority: WO
Inventors: 陈华民; 杨莉; 汪少勇; 谢创树; 张爽; 周敏
Original assignee: 广东省电力设计研究院
Priority date: 2008-12-31
Filing date: 2009-08-21
Publication date: 2010-07-08
Also published as: CN201364488Y

Abstract

An electronic switch control module of the nuclear power plant is provided, which is comprised of an input instruction processing logic unit (1), an error processing logic unit (2), a status processing logic unit (3), an output instruction generating logic unit (4) and a standby power incoming line switch cabinet. The four input ends of the input instruction processing logic unit (1) are respectively connected with the error signal end (1-1) of the work section PT cabinet, the error signal end(1-2) of the standby PT cabinet, the locking signal end (1-3) and the man- machine interface signal end (1-4) of the operators station, and its two output ends are respectively connected with one input end of the error processing logic unit (2) and one input end of the output instruction generating logic unit (4). The two input ends of the error processing logic unit (2) are respectively connected with one output end of the status processing logic unit (3) and one output end of the output instruction generating logic unit (4), and its two output ends are respectively connected with one input end of the status processing logic unit (3) and an alarm end (2-1) of the man-machine interface. The input end of the status processing logic unit (3) is connected with switch position status feedback signal (3-1) of the standby section incoming line, and its output is connected with the man-machine interface connector (3-2).One output end of the output instruction generating logic unit (4) is connected with the standby power incoming line switch cabinet control instruction signal end (4-1).

Description

Manual Nuclear power plant power switching control module

[1] Technical field

[2] The utility model relates to a power switching control module for a power plant of a nuclear power plant, which is suitable for automatic switching control of a switchgear in a power system of a 6.6 kV power plant, in particular to a 6.6 kV standby power line switch control of a nuclear power plant. It belongs to the field of electrical equipment technology.

[3] Background Art

[4] In nuclear power plants, power plant switching control, especially the reliability of 6.6kV power plant backup power line switch control is critical for the safe operation of 6.6kV power plant power system, 380V power plant power system and nuclear power plant unit. It is more related to the safe operation of the nuclear island. The prior art 6.6 kV standby power incoming switch control is completed by a relay control device provided in the switch cabinet, including an intermediate relay, a protection current relay and a voltage relay, and an intermediate relay mounted on the relay frame, The control switches and measuring instruments and connecting cables in the control room are used to control, interlock, measure and monitor alarms. There are defects in complicated wiring, poor reliability, difficult maintenance, low efficiency, and a large number of maintenance personnel to increase their operating costs.

[5] Utility model content

[6] The purpose of the utility model is to solve the defects of poor reliability, poor maintenance, low efficiency, large number of maintenance personnel and high operating cost of the 6.6 kV standby power inlet switch control of the nuclear power plant of the prior art. A power switching control module for a power plant of a nuclear power plant is provided.

[7] The purpose of the utility model can be achieved by taking the following technical solutions:

Nuclear power plant power switching control module, its structural features are: consists of input command processing logic unit, fault processing logic unit, state processing logic unit, output command generation logic unit and backup power incoming line switch cabinet; input command processing logic unit The four input terminals are respectively connected to the fault signal of the working section PT cabinet, the fault signal of the spare section PT cabinet, the blocking signal and the operator station man-machine interface signal, and the two output ends are respectively connected with the fault processing logic unit and the output instruction generating logic unit. An input terminal of the fault processing logic unit is respectively connected to an output terminal of the state processing logic unit and the output instruction generation logic unit, and the two output ends are respectively connected to an input end of the output instruction generation logic unit And the man-machine interface alarm terminal; the input end of the state processing logic unit is connected to the standby segment inlet switch position state feedback signal, and one output terminal is connected to the display unit of the human-machine interface; an output terminal of the output command generation logic unit is connected to the standby power inlet switch Cabinet control command signal terminal.

[8] The purpose of the utility model can also be achieved by taking the following technical solutions:

An embodiment of the present invention is: The input instruction processing logic unit is connected by the AND gate chip IC1~IC4; the fault processing logic unit is composed of the OR gate chip II, the R/S flip-flops Q1~Q2 and the delay chip Tl ~ Τ 2 is connected; the state processing logic unit is connected by the gate chips IC5~IC7 and the OR gate chip 12; the output command generation logic unit is connected by the OR gate chip 13, IC4; the fault signal connection of the working segment PT cabinet The input end of the gate chip IC1, the output end of the IC1 is connected to an input end of the terminal 13; the fault signal connection of the spare section PT cabinet is connected to the input end of the gate chip IC2, and the output end of the IC2 is connected to an input end of the 13; several latching signals One input terminal of IC3 is respectively connected; the operator station interface signal is respectively connected to one input terminal of II, 13 and one input end of IC4; a plurality of spare segment incoming line switch position state feedback signals are respectively connected to I 2 and IC 5 , IC 6 , the input end of IC7; the output end of 13 and 14 is connected to the standby power supply line switch cabinet control command signal end; the output end of Ql, Q2 and II is connected to the man-machine interface Police end; IC5 and the output terminal 16 is connected to Display screen end.

[9] An embodiment of the present invention is: The fault signal of the working section PT cabinet may include a working bus voltage low signal, a working bus PT disconnection signal, a working bus PT maintenance signal, and the fault signal of the spare section PT cabinet may include The backup bus fault signal, the backup bus PT disconnection signal, the standby bus PT maintenance signal, the blocking signal may include the auxiliary high-voltage side switch closing signal, the working bus incoming switch opening signal, the sectional switch opening signal and the residual voltage and The delay switch signal, the operator station man-machine interface signal may include an auxiliary variable protection action signal and a standby bus line switch closing signal.

[10] One embodiment of the present invention is: The standby segment incoming switch position state feedback signal may include the standby segment incoming switch closing signal, the standby segment incoming switch at the working position signal, and the standby segment incoming switch. The switch is in the test position signal, the standby section incoming switch opening signal, the standby section incoming line switch in the test position signal, and the standby section incoming line switch test switch in the normal position signal.

[11] An embodiment of the present invention is: The standby power incoming line switch cabinet control command signal end includes a trip signal and a closing signal.

[12] The beneficial effects of the utility model are: 1. The utility model is particularly suitable for the 6.6kV standby power supply line switch control, and uses the unified distributed control system DCS of the unit to realize the control of the 6.6kV standby power supply line switch and the unit control system sharing operator station, the overall monitoring, having Improve the reliability of the unit operation.

2. The utility model has the effect of reducing the use and maintenance cost by greatly improving the automation level of the unit, reducing the setting of the operation and maintenance personnel, and reducing the efficiency of the use and maintenance due to the centralized control system DCS of the unit.

[13] BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 is a logic block diagram of the present invention.

2 is a circuit schematic diagram of a specific embodiment of the present invention.

Figure 3 is a working flow chart of the present invention.

[14] Specific implementation

[15] Referring to FIG. 1, the embodiment is composed of an input instruction processing logic unit 1, a fault processing logic unit 2, a state processing logic unit 3, an output instruction generation logic unit 4, and a standby power incoming line switch cabinet; The four input terminals of 1 are respectively connected to the fault signal 1-1 of the working segment PT cabinet, the fault signal 1-2 of the spare segment PT cabinet, the blocking signal 1-3 and the operator station man-machine interface signals 1-4, two of which The output terminals are respectively connected to the fault processing logic unit 2 and one input terminal of the output instruction generation logic unit 4; the two input terminals of the fault processing logic unit 2 are respectively connected to an output terminal of the state processing logic unit 3 and the output instruction generation logic unit 4, The two output terminals are respectively connected to an input terminal of the output command generating logic unit 4 and the human-machine interface alarm terminal 2-1; the input terminal of the state processing logic unit 3 is connected to the spare segment incoming switch position state feedback signal 3-1, one The output terminal is connected to the display terminal 3-2 of the display unit; an output terminal of the output command generation logic unit 4 is connected to the standby power inlet switch cabinet Braking command signal terminal 4-1.

[16] Referring to FIG. 2, the input command processing logic unit 1 is connected by the AND gate chips IC1 to IC4; the fault processing logic unit 2 is composed of an OR gate chip II, R/S flip-flops Q1 to Q2, and a delay chip T1~ The T2 is connected; the state processing logic unit 3 is connected by the AND chip IC5~IC7 and the OR gate chip 12; the output command generation logic unit 4 is connected by the OR gate chip 13, IC4; the fault signal of the working segment PT cabinet 1-1 is connected to the input end of the gate chip IC1, the output end of the IC1 is connected to an input end of the 13; the fault signal 1-2 of the spare section PT cabinet is connected to the input end of the gate chip IC2, and the output end of the IC2 is connected to a 13 Input; several latching signals 1-3 and IJ are connected to one input of IC3; operator station man-machine interface signals 1-4 are connected to one input of II, 13 respectively Terminal and one input of IC4; several spare section incoming line switch position status feedback signal 3-1 are respectively connected to 12 and input terminals of IC5, IC6, IC7; the output ends of 13 and 14 are connected to standby power incoming line switch cabinet control command Signal terminal 4-1; Q Q2 and II output terminals are connected to the HMI alarm terminal 2-1; IC5 and 16 outputs are connected to the HMI display terminal 3-2.

[17] The fault signal 1-1 of the working section PT cabinet may include the working bus voltage low signal 1-1-1, the working bus PT disconnection signal 1-1-2, the working bus PT maintenance signal 1-1-3, and standby. The fault signal 1-2 of the segment PT cabinet may include a spare bus fault signal 1-2-1, a spare bus PT disconnection signal 1-2-2, a spare bus PT overhaul signal 1-3-3, and the latching signal 1-3 may Including auxiliary high-voltage side switch closing signal 1-3-1, working bus line switch opening signal 1-3-2, sectional switch opening signal 1-3-3 and residual voltage and delay switching signal 1- 3-4. The operator station man-machine interface signals 1-4 may include an auxiliary variable protection action signal 1-4-1 and a backup bus line switch closing signal 1-4-2. The spare section incoming line switch position status feedback signal 3-1 may include the standby section incoming line switch closing signal 3-1-1, the standby section incoming line switch in the working position signal 3-1-2, and the standby section incoming line switch. The switch is in the test position signal 3-1-3, the standby section incoming switch opening signal 3-1-4, the standby section incoming line switch in the test position signal 3-1-5, the standby section incoming line switch test switch is normal Position signal 3-1-6. The backup power supply line switch cabinet control command signal terminal 4-1 includes the trip signal 4-1-1 and the closing signal 4-1-2.

[18] Referring to Figure 3, the specific control flow of the utility model is as follows:

1) Input the command by the DCS man-machine interface;

2) the feasibility of the decision logic by the logic processing component;

3) The feasible command generates logic output to the circuit breaker control loop of the 6.6kV standby power incoming switchgear;

4) Infeasible, the fault signal is output by the alarm, and the detection device is sent to the man-machine interface, alarm! Reset or handle the failure;

5) The position feedback signal of the 6.6kV standby power incoming circuit breaker is input to the man-machine interface via the DCS signal input route port.

[19] Referring to Figures 1 and 2, the control and monitoring of the 6.6 kV standby power incoming line is implemented by the operator at the operator station of the DCS, including the remote closing of the 6.6 kV circuit breaker at the operator station of the DCS and Tripping operation, and the microcomputer-type integrated protection device installed in the switchgear detects the alarm action after the electrical circuit is faulty, causing the switch to trip and its position state feedback signal, and the alarm signal of the mechanical failure in the switchgear, through installation in the switchgear cabinet. CT, PT obtained electrical measurement signals, etc., these signals are sent to the DCS control mode through the cable Block, the control module performs logic processing according to the operation requirements, and then issues a jump/gate command and gives corresponding normal signals and alarm signals.

[20] In this embodiment, the signal input route port of the human machine interface is connected to the fault processing logic unit 2 output route port. The signal path input port of the fault processing logic unit 2 is connected to the signal processing route port of the state processing logic unit 3, the input command processing logic unit 1, and the output command generation logic element 4.

[21] The signal input route port of the input command processing logic unit 1 and the state processing logic unit 3 is connected to the control signal output route port of the field device.

[22] The input instruction logic processing unit 1 receives an external signal, and the input signal is judged by the detecting unit to determine the feasibility thereof, and provides corresponding processing results for the output instruction and the fault processing, and operates with the DCS operation interface. The instructions are connected together to the output port. The signal route input port is connected to the 6.6kV standby power incoming switchgear and other switchgear associated with the incoming switch control interlock or alarm signal, and the output command generation logic unit 4 is based on the input command logic processing unit 1 to determine the logical feasibility. As a result, it is output to the 6.6kV standby power incoming circuit breaker control loop.

[23] The state processing logic unit 3 receives the 6.6 kV standby power incoming circuit breaker position state for processing and sends it to the human machine interface and the fault handling logic unit 2.

[24] The fault processing logic unit 2 is to judge the logic of the input instruction logic processing unit, and the fault signal is processed by the fault alarm and output to the man-machine interface to alarm, reset or handle the fault.

[25] The 6.6kV standby power inlet switch is a backup circuit breaker for the backup power supply. It is installed in the switch cabinet and connected to the factory transformer to provide backup power for the 6.6kV bus.

[26] In addition to the standby power supply line switch control of the 6.6kV power plant of the nuclear power plant described in the specific embodiment, the utility model can also be widely used for the input switch control of other high and low voltage standby power sources or working power sources, and the application thereof is applicable. The range is not limited by the incoming switch control of the 6.6 kV power plant standby power supply line or the working power supply of the foregoing specific embodiment.

Claims

Claims nuclear power plant power switching control module, characterized by: processing logic unit by input instruction

(1), fault processing logic unit (2), state processing logic unit (3), output command generation logic unit (4) and standby power incoming line switch cabinet; input four input terminals of instruction processing logic unit (1) Connect the fault signal (1- 1) of the working section PT cabinet, the fault signal (1-2) of the standby PT cabinet, the blocking signal (1-3) and the operator station man-machine interface signal (1-4), respectively. The outputs are respectively connected to the fault processing logic unit (2) and one input of the output command generation logic unit (4); the two input terminals of the fault processing logic unit (2) are respectively connected to the state processing logic unit (3) and the output command Generating an output of the logic unit (4), the two outputs of which are respectively connected to an input terminal of the output command generation logic unit (4) and the human-machine interface alarm terminal (2-1); the state processing logic unit (3) The input terminal is connected to the standby segment inlet switch position status feedback signal (3-1), one output terminal is connected to the display unit display terminal (3-2); and the output command generating logic unit (4) is connected to an output terminal. Switchgear with power line control command signal terminal (4-1).

The power switching control module for a power plant of a nuclear power plant according to claim 1, wherein: the input command processing logic unit (1) is connected by the AND gate chips IC1 to IC4; the fault processing logic unit (2) is composed of an OR gate chip II, The R/S flip-flops Q1 to Q2 are connected to the delay chip T1 to T2; the state processing logic unit (3) is connected by the AND gate chips IC5 to IC7 and the OR gate chip I 2; and the output instruction generation logic unit ( 4) Connected by the OR gate chip 13, IC4; The fault signal (1- 1) of the working segment PT cabinet is connected to the input end of the gate chip IC1, and the output end of IC1 is connected to one input terminal of the 13; The fault signal (1-2) is connected to the input end of the gate chip IC2, and the output end of the IC2 is connected to one input end of the 13; a plurality of latching signals (1-3) are respectively connected to one input end of the IC3; the operator station man-machine interface Signals (1-4) are connected to one input of II, 13 and one input of IC4 respectively; several spare section incoming switch position status feedback signals (3-1) are connected to 12 and input terminals of IC5, IC6, IC7 respectively The outputs of 13 and 14 are connected to the standby power supply. Switchgear control command signal terminal (4 -1); Ql, Q2, and an output terminal connected to the Display Alarm II ends (2- 1); IC5 and the output terminal 16 is connected to Display screen side (3-2).

[3] The power switching control module for a power plant of a nuclear power plant according to claim 1, characterized in that: the fault signal (1-1) of the working section PT cabinet includes a working bus voltage low signal (1-1-1), a working bus PT Disconnection signal (1-1-2), working bus PT inspection signal (1-1-3), spare segment PT cabinet failure signal (1-2) including spare bus failure signal (1-2-1), standby Bus PT disconnection signal (1-2-2), spare bus PT maintenance signal (1-3-3), blocking signal (1 - 3) including auxiliary high-voltage side switch closing signal (1-3-1), Working bus line switch opening signal (1-3-2), sectional switch opening signal (1-3-3) and residual voltage and delay switching signal (1-3-4), operator station man-machine The interface signals (1-4) include the auxiliary variable protection action signal (1-4-1) and the alternate bus line switch closing signal (1-4-2).

[4] The power switching control module for a power plant of a nuclear power plant according to claim 1, characterized in that: the standby state line switch position state feedback signal (3-1) includes the standby section incoming line switch closing signal.

(3-1-1), the standby section incoming line switch in the working position signal (3-1-2), the standby section incoming line switch test switch in the test position signal (3-1-3), the spare section incoming line switch Opening signal

(3-1-4), the standby section incoming line switch is in the test position signal (3-1-5), and the standby section incoming line switch test switch is in the normal position signal (3-1-6).

[5] The power switching control module for a nuclear power plant according to claim 1, wherein: the standby power incoming switchgear control command signal terminal (4-1) includes a trip signal (4-1-1) and a closing signal ( 4-1-2).