KR101054386B1 - Integrated DC Protection Relay System for Electric Railways - Google Patents

Abstract

The present invention relates to an integrated DC protective relay system of an electric railway; An Incoming Panel for supplying DC electricity through a transformer and a rectifier; A Line Feeder Panel and a Negative Panel for supplying the DC electricity which has passed through the Incoming Panel to the tram line and the track; Collect measurement data of the incoming panel, line feeder panel and negative panel, and collect the incoming panel, line feeder panel and negative panel. It is characterized by consisting of; integrated relay base for controlling to trip and switch the breaker of the (Negative Panel) according to the fault condition.

According to the present invention, by collecting the measurement data of a plurality of panels constituting the DC substation facility for power supply of the electric railway in one integrated relay base and by controlling the breakers and disconnectors provided in each panel of the DC substation facility system The cost of the equipment can be reduced, and the measurement and control data of the substation equipment can be quickly transferred from one integrated relay base to the upper system.

Electric Railway, Relay

Description

Integrated DC protective relaying system of electricrailway

The present invention relates to an integrated DC protection relay system of an electric railway, and more specifically, to a relay provided in a plurality of monitoring panels constituting a DC substation facility of an electric railway to independently monitor a state of a DC power system. The present invention relates to an integrated DC protection relay system for electric railways, which can be efficiently managed and monitored by one integrated management.

In general, an electric railway system is composed of a power supply system, a vehicle, a tram line, and a return line (running rail), and a parallel feeding method in which a plurality of substations are connected in parallel in a DC train section is a standard. It consists of Sub-station, Sectioning Post (SP), Tie Post (TP) and Rectifying Post (RP).

At this time, the DC substation equipment for supplying the DC electricity to the tram line and the line in the substation, as shown in Figure 1 is a rectifier (2) for receiving an alternating current of 22.9kV and converting to direct current through the transformer (1), and the power required Incoming Panel (3) equipped with instruments, control switches, protective relays, etc., Line Feeder Panel (6) for supplying DC electricity to the tramline (4), and tramline (4) DC train passing through the train (7) is composed of a DC train negative panel (Negative Panel) (8) to be returned through the track (5).

In this way, by supplying the DC electricity to the tram line (3), the train (7) can be supplied to operate through the pantograph.

At this time, if an accident occurs in the DC power supply system, a feed section is provided with an air section (AS) at the section where the tramline is divided so that the accident section can be divided and blocked by a high speed breaker (HSCB). The grid connects different feed lines to eliminate voltage differences and compensate for voltage drops. DC feeding system is operated by non-grounding method and prevents ground fault by using DC ground relay between panel and ground, line and ground respectively.

Meanwhile, relay elements and state input / output states for each panel are configured as shown in FIG. 2 to achieve protection coordination.

At this time, the negative panel (8) receives the negative polarity of the rectifier (2) and supplies voltage to the line (5) through the disconnector (8a), the negative panel (8), ground (Ground), the line (5) Ground fault relay is installed between the ground and ground and the circuit which measures voltage, current and power is composed.

The control of the disconnector 8a may be controlled through a remote terminal device (RTU) or local control. In addition, there is a case where a heavy Fault Relay is installed that detects and trips an arc monitoring device that does not have arc arc of each HSCB.

Next, the incoming panel (3) is provided with a high speed circuit breaker (HSCB) 3a, a reverse current relay 32, a DC overcurrent relay 76, and an abnormal state of the rectifier 2 or the incoming panel. The high speed circuit breaker (HSCB) 3a is tripped in response to an abnormal condition of the heavy fault relay and reverse current relay 32 of the (Incoming Panel) (3).

In addition, Line Feeder Panel 6 and Spear Panel 9 are high speed circuit breaker (HSCB) 6a, 9a, DC overcurrent relay 76, contact car phase relay 85, optional. A cut-off relay 50 and a disconnector (DS) 6b are provided, and the high-speed breaker (HSCB) 6a, 9a is tripped during the instantaneous and timed operation of the DC overcurrent relay 76, or the selective cutoff relay 50 The high speed circuit breaker (HSCB) 6a, 9a is tripped according to the algorithm of di / dt and Delta I.

In this case, when the contacting step-step electrician (85) trips the high speed circuit breaker (HSCB) 6a, 9a due to a certain failure factor, the high speed circuit breaker (HSCB) of the same line feeder panel (6) of the neighboring substation. By blocking at the same time as (6a), it prevents the spread of faults.

In addition, the line feeder panel (Line Feeder Panel) (6) is provided with a voltage measuring circuit to display the voltage on the panel or to transmit to the upper monitoring system. The control of the disconnector 6b can be controlled locally or remotely according to the switch state of the panel.

Therefore, in the case of the electric power feeding method of such a general electric railway, an incoming panel 3, a line feeder panel 6, and a spare panel as shown in FIG. (9), a relay (3c) that monitors the state of each of the negative panels (8) and detects and controls a signal for tripping the circuit breakers 3a, 6a, 8a, and 9a when an abnormal situation occurs. , 6c, 8c, and 9c are individually installed independently.

Accordingly, one or more relays 3c, 6c, 8c, and 9c are provided in the breakers 3a, 6a, 8a, and 9a provided in the respective panels 3, 6, 8, and 9, and are installed to block the failure in the event of a failure. ) Exists.

In this case, the relays 3c, 6c, 8c, and 9c receive measurement data such as current or voltage from the CT or the transformer PT, and determine a failure. 3a, 6a, 8a, and 9a are tripped.

At this time, the relays 3c, 6c, 8c, and 9c provided in the panels 3, 6, 8, and 9 are operated with the relay (main protection relay) closest to the point of failure first, followed by the main protection relay. The relay close to the point (post-protection relay) adjusts the operation value (operation coordination) to operate when the main protection relay is not active.

As described above, since the relays 3c, 6c, 8c, and 9c are provided for each of the panels 3, 6, 8, and 9, there is a problem of causing an increase in facility cost.

On the other hand, the post-protection relay sets the operation time later than the main protection relay to assume that the main protection relay is inoperable if the main protection relay continues to malfunction after a few seconds after the operation for coordination. For this reason, when the main protection relay is negatively operated, there is a problem that a lot of time is delayed in the operation of the back protection relay due to the operation time and the breaker operation time of the main protection relay.

In addition, due to the structure in which monitoring information such as voltage, current, and status of each relay is collected by the remote terminal device (RTU) 10 and directly transmitted to the upper system 12 or a nearby substation, this is also complicated and increases in facility cost. Has a problem that causes.

Accordingly, the present invention is to solve this problem, provided in a plurality of panels constituting a direct current (DC) substation facility for the power supply of electric railway, each type of relay to independently monitor the state of the DC power system for each type It is possible to reduce the cost by installing one integrated relay base without installing several units, and the integrated DC protection relay of electric railway that can quickly transfer monitoring data of substation equipment from one integrated relay base to the upper system. The purpose is to provide a system.

In addition, the present invention provides an integrated DC protection relay system of an electric railway capable of quick operation coordination when a breaker malfunction occurs, such as by implementing a time delay generated by operating each relay based on one relay. There is this.

The present invention to achieve this object;

An Incoming Panel for supplying DC electricity through a transformer and a rectifier; A Line Feeder Panel and a Negative Panel for supplying the DC electricity which has passed through the Incoming Panel to the tram line and the track; Collect measurement data of the incoming panel, line feeder panel and negative panel, and collect the incoming panel, line feeder panel and negative panel. It provides an integrated DC protection relay system for an electric railway, comprising: an integrated relay base for controlling the breaker of the (Negative Panel) to trip and switch according to a fault condition.

At this time, the breaker is characterized in that the high speed circuit breaker (HSCB).

On the other hand, the incoming panel (Incoming Panel); An incoming data measurement unit for measuring incoming measurement data such as a main circuit current, a current direction for reverse current sensing, an ARC sensor output, a breaker state, and a temperature measurement to transmit the integrated relay base; The first circuit breaker is controlled by the integrated relay base when the failure occurs to block the input of DC electricity to the main circuit.

At this time, the incoming panel (Incoming Panel) is characterized in that it further comprises a first breaker for opening and closing to change the connection of the main circuit in the no-load state.

In addition, the line feeder panel (Line Feeder Panel); A line feeder data measuring unit for measuring line feeder measurement data such as current, line test voltage, ARC sensor output, breaker and disconnector status; And a second circuit breaker for controlling the input of DC electricity to the main circuit when the fault occurs by the integrated relay base.

At this time, the line feeder panel (Line Feeder Panel) is characterized in that it further comprises a second breaker for opening and closing to change the connection of the main circuit in the no-load state.

On the other hand, the negative panel (Negative Panel); A negative data measuring unit for measuring negative data such as a voltage between the negative bus line and the ground, a current between the enclosure and the ground, a voltage between the positive electrode and the negative electrode, a negative current and power amount, and a state of the disconnector; And a third circuit breaker for controlling the input of DC electricity to the main circuit by controlling by the integrated relay base when a fault occurs.

At this time, the line feeder panel (Line Feeder Panel) is characterized in that it further comprises a third breaker for opening and closing to change the connection of the main circuit in the no-load state.

In addition, a switch panel (Spear Panel) is switched at the time of tripping the circuit breaker of the line feeder panel (Supply) to supply the DC electricity to the tramline (4).

In addition, the integrated relay base; A relay unit operated according to measurement data of the incoming panel, a line feeder panel, a negative panel, and a spare panel; And a control unit for outputting control data for controlling the circuit breaker according to the operation of the relay unit.

At this time, it characterized in that it further comprises a data transmission unit for transmitting the measurement data and the control data to the upper system.

On the other hand, the relay unit; It is characterized by including a DC overcurrent relay, reverse current relay, DC ground relay, contact breaker, fault selection relay, arc relay and low voltage relay.

According to the present invention, by collecting the measurement data of a plurality of panels constituting the DC substation facility for power supply of the electric railway in one integrated relay base and by controlling the breakers and disconnectors provided in each panel of the DC substation facility system The cost of the equipment can be reduced, and the measurement and control data of the substation equipment can be quickly transferred from one integrated relay base to the upper system.

In addition, the present invention has the advantage that quick operation coordination is achieved even if a problem such as breaker malfunction occurs by minimizing time delay caused by each relay operation.

Hereinafter, an integrated DC protective relay system of an electric railway according to the present invention will be described in detail with reference to the accompanying drawings.

At this time, Figure 4 is a schematic diagram of a DC substation facility equipped with an integrated DC protective relay system of the electric railway according to the present invention, Figure 5 is a detailed configuration of the integrated DC protective relay system of the electric railway according to the present invention.

4 and 5, the integrated DC protection relay system of the electric railway according to the present invention is installed and operated in the DC substation facility of the electric railway.

The DC substation facility is a facility for supplying DC electricity to the tram line and the line in the substation, as shown in the rectifier (2) for receiving an alternating current of 22.9 kV and converting to DC through the transformer (1), and the rectifier (2) Incoming Panel (100) for supplying DC electricity through the line, and Line Feeder (Line Feeder) for supplying DC electricity through the Incoming Panel (100) to the tramline (4) and the line (5) Panel 200 and a negative panel (Negative Panel) (300).

Of course, the DC substation facility is further provided with a spare panel (Spear Panel) 400 which can be used to separate the main circuit due to the failure of the line feeder panel (200).

In this case, the spare panel 400 performs the same function as the line feeder panel 200, and operates the disconnecting device 210 of the line feeder panel 200. When the line feeder panel (Line Feeder Panel) 200 is separated, the spare panel (Spear Panel) 400 is switched to be connected to the tank line (4).

Such a plurality of panels (100, 200, 300, 400) is provided with a current transformer (CT) or instrument transformer (PT) to determine the failure by receiving measurement data such as current or voltage, each panel (100, 200, 300, 400) Measure the measurement data that can trip the circuit breaker (120,220,320,420) provided in.

On the other hand, in order to configure the integrated DC protective relay system of the electric railway according to the present invention the Incoming Panel (Incoming Panel) 100, Line Feeder Panel (200), Negative Panel (Negative Panel) 300 ), Collecting the measurement data of the Spear Panel (400) to monitor the status, Incoming Panel (100), Line Feeder Panel (200), Negative Panel (Negative) Panel 300, Spear Panel 400, each of the circuit breakers (120, 220, 320, 420) and the integrated relay base (500) for controlling the tripping and switching according to the fault condition is further provided do.

In this case, the circuit breakers 120, 220, 320, and 420 use a high speed circuit breaker (HSCB) that operates at a high speed so as to react quickly when a fault condition occurs.

On the other hand, the integrated relay base 500 transmits and manages the measurement data measured and monitored in each panel (100, 200, 300, 400) to the upper system 600.

Hereinafter, the configuration of the present invention in more detail.

First, the incoming panel 100 into which the DC electricity passed through the rectifier 2 is inputted has a first circuit breaker 120 for blocking the input of DC electricity to the main circuit in the event of a fault condition, and a no-load state. In order to change the connection of the main circuit in the first disconnecting unit 110 is provided.

At this time, the incoming panel (100) is a well-known to measure the incoming measurement data such as the main circuit current, current direction for reverse current sensing, ARC sensor output, breaker status, temperature measurement, etc. Coming data measuring unit 130 is provided.

In addition, the incoming measurement data measured by the incoming data measurement unit 130 is transmitted to the integrated relay base 500, the incoming panel (100) is a trip signal due to reverse current, rectifier abnormal state Receive incoming control data such as a trip signal by the integrated system 500.

Next, the line feeder panel 200 into which the DC electricity passed through the incoming panel 100 is input is configured to block the input of the DC electricity to the main circuit when a failure occurs. The second circuit breaker 220 and a second circuit breaker 210 for opening and closing to change the connection of the main circuit in the no-load state are provided.

In this case, the line feeder panel 200 is a known line feeder for measuring line feeder measurement data such as a current of a main circuit, a line test voltage, an ARC sensor output, and a state of a breaker and a disconnector. The data measuring unit 230 is provided.

In addition, the line feeder measurement data measured by the line feeder data measuring unit 230 is transmitted to the integrated relay base 500, the line feeder panel 200 is a trip signal due to reverse current, rectifier error Line feeder control data such as trip signal and disconnector control signal by state are received from the integrated relay base 500.

In this case, the line feeder panel 200 has a structure in which a plurality of the line feeder panels 200 are connected in parallel, and supplies DC electricity to the tramline 4.

On the other hand, a spare panel (Spear Panel) 400 of the same structure as the line feeder panel (Line Feeder Panel) 200 is further connected in parallel, and transmits and receives data with the integrated relay base (500).

In more detail, the spare panel 400 also includes known spare data for measuring spare measurement data such as a current of a main circuit, a line test voltage, an ARC sensor output, and a state of a breaker and a disconnector. The measuring unit 430 is provided.

In addition, the spare measurement data measured by the spare data measuring unit 430 is transmitted to the integrated relay base 500, the spare panel 400 is a trip signal due to reverse current, due to the rectifier abnormal state Spare control data such as a trip signal is received from the integrated relay base 500.

In this case, due to a failure of a specific line feeder panel 200, a line feeder control data including a trip signal and a disconnector control signal by a reverse current from the integrated relay base 500 may be included in the integrated relay base ( When received from the 500, the DC electricity is supplied to the vehicle line 4 through the spare panel 400 due to the trip of the second circuit breaker 220 and the switching of the second circuit breaker 210.

Next, the DC electricity supplied to the tram line through the line feeder panel 200 is returned to the negative panel 300 through the train 7 and the line 5. Such a negative panel 300 is a third circuit breaker 320 for blocking the input of the DC electricity to the main circuit in the event of a failure situation, and the opening and closing to change the connection of the main circuit in the no-load state The three disconnecting unit 310 is provided.

In addition, the negative panel 300 measures negative data such as the voltage between the negative bus line and the ground, the current between the enclosure and the ground, the voltage between the positive electrode and the negative electrode, the negative current and the amount of power, and the state of the disconnector. A known negative data measurement unit 330 is provided.

In addition, the negative data measured by the negative data measuring unit 330 is transmitted to the integrated relay base 500, the negative panel (300) is the third breaker 320 and the third breaker (310) Control signal is transmitted from the integrated relay base (500).

Meanwhile, the integrated relay base 500 includes an incoming panel 100, a line feeder panel 200, a negative panel 300, and a spare panel (Spear panel). Collecting measurement data of each of the 400 and the Incoming Panel (100), Line Feeder Panel (200), Negative Panel (300), Spare Panel (Spear Panel) Incoming Panel (100), Line Feeder Panel (Line Feeder Panel) to control to trip and switch each breaker (120,220,320,420) and disconnectors (110,210,310) constituting 400 according to a fault condition The first to third breakers 120, 220, 320 and the first to third disconnectors 110, 210, and 310 are operated according to the measurement data of the 200, the negative panel 300, and the spare panel 400. The relay unit 510 which operates for the first and third circuit breakers 120, 220, and 320 and the first to third circuits according to the operation of the relay unit 510. The third disconnecting switches (110 210 310), the control section 520 for outputting the control data for controlling, and a data transmission unit 530 for transmitting the measurement data and control data to the top of the system 600.

In this case, the relay unit 510 collects and monitors all measurement data transmitted from each panel 100, 200, 300, and 400, thereby managing the failure section integrally, thereby enabling accurate and quick failure response.

The relay unit 510 includes a plurality of DC overcurrent relays 511, reverse current relays 512, DC ground fault relays 513, contact difference stage relays 514, fault selection relays 515, and arc relays 516. , A low voltage relay 517 or the like.

The DC overcurrent relay 511 is provided from a line feeder panel 200 in which an incoming panel 100 in which the first circuit breaker 120 is installed and a second circuit breaker 220 are installed. Incoming measurement data and line feeder data are received to determine instantaneous overcurrent components.

The reverse current relay 512 receives the incoming measurement data from the incoming panel 100 to detect the direction of the current flowing in the rectifier 2, and when the reverse current is detected, the incoming panel. By blocking the first circuit breaker 120 of the (Incoming Panel) 100 to protect the device and the system.

The DC ground relay 513 is a relay that detects the ground fault of the tramline 4 and the tram line 5 by receiving negative measurement data of the negative panel 300, and detects a voltage between the tram line and the ground. It is divided into 64P to measure and 64HR to measure the current between the enclosure and ground. By grounding the blocking base insulated from the ground through 64HR, the third circuit breaker 320 is cut off by measuring the current flowing through the 64HR when contacting the enclosure and the positive electrode. 64P is installed between the line and the substation ground to measure the line voltage when the line is grounded to cut off the third circuit breaker 320.

The contact vehicle step of electricity 514 is a DC feed system that receives the line feeder measurement data of the line feeder panel (Line Feeder Panel) 200 in parallel feed when the second circuit breaker 220 is blocked due to some obstacles If the second circuit breaker 220 is not blocked, there is a risk that the accident may proceed, so it functions to open a power circuit breaker by sending a blocking signal to the circuit breaker facing each other.

The failure selection relay 515 receives the line feeder measurement data of the line feeder panel 200 to determine the normal starting current and the fault current, such as initial slope, current change amount, slope duration, etc. In consideration of the error, judge the fault and cut off.

The arc relay 516 receives the line feeder measurement data of the line feeder panel 200 and the arc is not extinguished during the blocking operation of the second circuit breaker 220, which is a high speed circuit breaker. This is to prevent the risk of escalating into an accident and leading to a fire accident.

The low voltage relay 517 receives negative measurement data of a negative panel 300 and operates to protect the vehicle or power equipment from failure due to a low voltage of the wire voltage due to an accident.

The measurement data and the control data collected by the relay unit 510 are transmitted to the upper system 600 through the data transmission unit 530 according to the logic of the control unit 520 is integrated monitoring.

In this case, the controller 520 is configured as a PLC, and when the trip signal is generated by analog measurement data such as voltage and current signals input from the respective panels 100, 200, 300, and 400, the DO is determined according to the logic state of the PLC. Output or input DI to generate DO output according to PLC logic status.

Hereinafter, an example of an operation process of an integrated DC protection relay system of an electric railway according to the present invention will be described.

In the normal process of supplying DC electricity through the panels (100, 200, 300, 400) through the transformer (1) and the rectifier (2), the measurement data of all panels (100, 200, 300, 400) is collected by the relay unit 510 of the integrated relay base 500 The state is monitored using the measurement data, and the measured measurement data is transmitted to the upper system 600.

In such a state, for example, when a failure situation occurs in the line feeder panel 200, a specific relay of the relay unit 510 of the integrated relay base 500 is operated, thereby corresponding line feeder. The line feeder panel 200 is separated while the second circuit breaker 220 of the line feeder panel 200 is tripped and the second circuit breaker 210 is quickly changed. Spare panel (Spear Panel) 400 is switched to be connected to the catenary (4), such control data is also transmitted to the upper system 600 can be integrated monitoring.

Although the preferred embodiment of the present invention has been described above, the scope of the present invention is not limited thereto, and the scope of the present invention extends to the scope of the present invention to be substantially equivalent to the embodiment of the present invention. Various modifications can be made by those skilled in the art without departing from the scope of the present invention.

1 is a system diagram showing a DC substation installation of a general electric railway.

FIG. 2 is a detailed configuration diagram of the DC substation facility of FIG. 1. FIG.

3 is a relay control block diagram of the DC substation facility of FIG. 2;

4 is a system diagram of a direct current substation facility equipped with an integrated DC protection relay system of an electric railway according to the present invention.

5 is a detailed configuration of the integrated DC protective relay system of the electric railway according to the present invention.

*** Explanation of symbols for main parts of drawing ***

100: Incoming Panel

200: Line Feeder Panel

300: Negative Panel

400: Spear Panel

500: integrated relay base

600: top system

Claims (12)

An Incoming Panel for supplying DC electricity through a transformer and a rectifier; A Line Feeder Panel and a Negative Panel for supplying the DC electricity which has passed through the Incoming Panel to the tram line and the track; A spare panel (Spear Panel) which is switched at the breaker trip of the line feeder panel and supplies DC electricity to the tank line; Collect measurement data of the incoming panel, line feeder panel and negative panel, and collect the incoming panel, line feeder panel and negative panel. It is configured to include; an integrated relay base for controlling tripping and switching of the breaker of the (Negative Panel) according to the fault condition The integrated relay base is; A relay unit operated according to measurement data of the incoming panel, a line feeder panel, a negative panel, and a spare panel; A control unit for outputting control data for controlling the breaker according to the operation of the relay unit; And a data transmission unit configured to transmit the measurement data and the control data to an upper end system. The method of claim 1, The circuit breaker is an integrated DC protection relay system of an electric railway, characterized in that the high speed circuit breaker (HSCB). The method of claim 1, wherein the incoming panel (Incoming Panel); An incoming data measurement unit for measuring incoming measurement data such as a main circuit current, a current direction for reverse current sensing, an ARC sensor output, a breaker state, and a temperature measurement to transmit the integrated relay base; An integrated DC protection relay system for an electric railway, comprising: a first circuit breaker controlled by the integrated relay base to block input of DC electricity to a main circuit when a fault occurs. The method of claim 3, The incoming panel (Incoming Panel) is an integrated DC protection relay system of an electric railway, characterized in that it further comprises a first breaker for opening and closing to change the connection of the main circuit in the no-load state. The method of claim 1, wherein the line feeder panel (Line Feeder Panel); A line feeder data measuring unit for measuring line feeder measurement data such as current, line test voltage, ARC sensor output, breaker and disconnector status; And a second circuit breaker, which is controlled by the integrated relay base to block the input of DC electricity to the main circuit in the event of a fault condition. 2. The method of claim 5, The line feeder panel (Line Feeder Panel) is an integrated DC protection relay system of an electric railway, characterized in that it further comprises a second breaker for opening and closing to change the connection of the main circuit under no load. The method of claim 1, wherein the negative panel (Negative Panel); A negative data measuring unit for measuring negative data such as a voltage between the negative bus line and the ground, a current between the enclosure and the ground, a voltage between the positive electrode and the negative electrode, a negative current and power amount, and a state of the disconnector; And a third circuit breaker controlled by the integrated relay base to block the input of DC electricity to the main circuit in the event of a fault condition. The method of claim 7, wherein The line feeder panel (Line Feeder Panel) is an integrated DC protection relay system of an electric railway, characterized in that it further comprises a third breaker for opening and closing to change the connection of the main circuit under no load. delete delete delete The apparatus of claim 1, wherein the relay unit; An integrated DC protective relay system for an electric railway, comprising a DC overcurrent relay, a reverse current relay, a DC ground relay, a circuit breaker, a fault selector relay, an arc relay, and a low voltage relay.

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