Subway direct current protection intertripping method and system based on GOOSE networking communication

Abstract

The invention discloses a subway direct current protection intertripping method and system based on GOOSE networking communication. The method comprises the following steps: constructing a GOOSE network in a traction substation by using an optical fiber switch; according to the type of a protection action sent by a protection device configured in the traction substation, executing a corresponding inter-tripping scheme: when the direct current feeder protection device performs the protection action, executing double-side inter-tripping of direct current feeder protection; when the circuit breaker of the direct-current protection device has a failure fault, executing an in-substation / double-side inter-tripping scheme of direct-current circuit breaker failure protection; and when a frame leakage protection action occurs, corresponding shunt tripping actions are executed according to current and voltage leakage conditions of different DC cabinet frames. According to the invention, the GOOSE network is established through the optical fiber switch, so that efficient and stable transmission of inter-tripping signals of various protection mechanisms and accurate control of the inter-tripping range are realized; the inter-tripping logic is set according to the type of the protection action sent by the protection device, so that the comprehensive inter-tripping function and high real-time performance are ensured, and the inter-tripping range is accurately controlled.

Description

Technical Field

[0001] The present invention relates to secondary equipment technology in the field of rail transit, and more specifically, to a subway DC feeder protection joint tripping method and system based on a GOOSE networking communication mechanism. Background Art

[0002] In the subway DC traction power supply system, the standard traction substation configuration includes 4 DC feeder switch cabinets for supplying power to the overhead line, 2 DC incoming line switch cabinets for connecting to the power supply, 1 energy-feed brake switch cabinet and 1 negative pole cabinet. Each switch cabinet contains a circuit breaker and a relay protection device. Under normal circumstances, each substation adopts a bilateral power supply mode by closing the DC feeder circuit breaker to enhance the stability of power supply. The inter-zone isolating switch is usually disconnected to ensure that the feeders of two adjacent substations operate independently. When a traction substation is out of operation, its inter-zone isolating switch is closed, and its upstream and downstream bidirectional neighboring stations are directly connected to form a large bilateral power supply mode.

[0003] The joint jump mechanism includes:

[0004] DC feeder protection bilateral tripping: the device near the fault point trips after detecting the fault and notifies the device on the opposite side to trip as well.

[0005] DC circuit breaker failure protection inter-tripping: If the protection device operates but fails to effectively cut off the current, the failure protection will be triggered to send out a corresponding inter-tripping signal, disconnect the relevant circuit breaker and lock it to isolate the fault area.

[0006] Frame leakage protection interlocking: In response to leakage conditions at different locations, the negative pole protection device will send out corresponding interlocking signals according to the fault type, disconnect the relevant circuit breakers and lock them to isolate the fault area.

[0007] This configuration and protection strategy ensures that the safety and reliability of the overall power supply network can be maintained even in the event of a single substation failure or local fault. However, in traditional subway DC protection, the inter-tripping mechanism of feeder protection, circuit breaker failure protection and frame leakage protection generally uses control cables as the signal transmission medium. This not only leads to a large number of circuits, a large amount of I / O, a large amount of cable consumption, a complex wiring topology, and poor anti-interference ability, but also incompatibility between relay protection devices from different manufacturers. The use of GOOSE optical fiber networking to transmit inter-tripping signals not only has strong anti-interference capabilities and reduces the demand for secondary cables, but also simplifies the networking process and facilitates configuration.

[0008] At present, there are three main methods for DC protection tripping:

[0009] (1) The DC protection inter-tripping method based on control cables and relays has the following technical problems: when a traction substation is out of operation, in addition to closing the inter-zone disconnector to achieve large bilateral power supply, multiple inter-tripping relays must be manually adjusted so that the DC feeder protection devices of the adjacent substations on both sides can directly transmit the inter-tripping signal and bypass the substation that has been out of operation. This process increases the complexity of operation and the possibility of error.

[0010] Relay protection devices produced by different manufacturers may have differences in the way they implement the protection tripping function, resulting in incompatibility between devices of different brands. This inconsistency makes it extremely challenging to upgrade or modify the system, which not only increases the difficulty of project implementation, but also may affect the reliability and maintenance efficiency of the system.

[0011] (2) The method of transmitting the interleaved signal based on the shielded twisted pair cable has the following problems: the communication distance is limited and the anti-interference ability is poor.

[0012] (3) Protection interlocking scheme based on GOOSE point-to-point communication: The DC feeder protection devices on both sides of the same power supply partition of two adjacent substations realize bilateral interlocking signal transmission through directly connected optical fibers, thus eliminating the intermediate GOOSE switch. However, the information exchange between devices inside the substation still relies on traditional cable and relay connection methods, which requires a lot of physical wiring.

[0013] When using the large bilateral power supply mode, this solution completely relies on relays and cables between devices in the station to forward the interlocking signal. Therefore, any change in the device status or configuration (such as a change in the position of the trolley, adjustment of the pressure plate setting, or modification of the control word) may result in limited transmission of the interlocking signal.

[0014] In addition, in the point-to-point communication mode, the information exchange capability between stations is weak, and data sharing across the entire line cannot be achieved. This limits the development of advanced intelligent application functions of the subway, such as fault analysis, precise positioning, and automatic recovery of the system, which is not conducive to long-term application. Summary of the invention

[0015] In order to solve the deficiencies in the prior art, the present invention provides a subway DC protection inter-tripping method based on GOOSE networking communication, which can realize efficient and flexible transmission of DC protection inter-tripping signals and support one-to-one or one-to-many communication requirements.

[0016] The present invention adopts the following technical solution.

[0017] A subway DC protection joint tripping method based on GOOSE networking communication comprises the following steps:

[0018] In the traction substation of the subway line, a GOOSE network is built using fiber optic switches;

[0019] According to the type of protection action issued by the DC protection device configured in the traction substation, the corresponding tripping plan is executed:

[0020] When the DC feeder protection device is in action, the DC feeder protection bilateral tripping is executed, including the DC feeder protection device on this side tripping the circuit breaker it controls, and sending a GOOSE bilateral tripping signal to the DC feeder protection device on the opposite side to trip the circuit breaker controlled by the DC feeder protection device on the opposite side;

[0021] When the circuit breaker controlled by the DC protection device fails, the DC circuit breaker failure protection internal / bilateral tripping is executed, including the DC protection device sending a GOOSE failure protection internal / bilateral tripping signal to the circuit breakers controlled by all DC protection devices in the traction substation and the DC feeder protection device on the opposite side, so as to trip and lock the circuit breakers controlled by the DC protection device on this side and the circuit breakers controlled by the DC feeder protection device on the opposite side;

[0022] When frame leakage protection occurs, corresponding interlocking actions are performed according to the current and voltage leakage conditions of different DC cabinet frames.

[0023] Preferably, the use of a fiber optic switch to construct a GOOSE network specifically includes:

[0024] An IEC61850 optical fiber switch is configured in the subway traction substation. The DC protection device in the traction substation is equipped with a GOOSE communication board. Each DC protection device in the subway traction substation is connected to the IEC61850 optical fiber switch using optical fiber. The switches of two adjacent stations are also connected using optical fiber.

[0025] Among them, the DC protection devices include 4 DC feeder protection devices, 1 DC negative pole protection device, 2 DC incoming line protection devices and 1 energy-feed brake protection device;

[0026] For the traction substation C in the subway line, the DC protection device in the traction substation C can communicate with the DC protection device in the substation itself, as well as with the DC protection devices of the adjacent traction substation B in the downstream direction and the next adjacent traction substation A in the same direction. The DC protection device in the traction substation C can also communicate with the DC protection devices of the adjacent traction substation D in the upstream direction and the next adjacent traction substation E in the same direction.

[0027] Preferably, when the GOOSE network operates normally, the DC feeder protection device and the DC negative pole protection device in the traction substation C can obtain the real-time positions of the inter-zone disconnectors located in the traction substation B and the traction substation D, and determine the opposite DC feeder protection device of each DC feeder protection device in the traction substation accordingly, as follows:

[0028] The DC feeder protection device in traction substation C obtains the real-time position of the inter-regional isolating switch of traction substation B: if the inter-regional isolating switch is in the open position, the DC feeder protection device of traction substation B is on the opposite side, and the two form a bilateral power supply; if the inter-regional isolating switch is in the closed position, the DC feeder protection device of traction substation A is on the opposite side, and the two form a large bilateral power supply;

[0029] The DC feeder protection device in traction substation C obtains the real-time position of the inter-zone disconnector of traction substation B: if the position of the inter-zone disconnector is open, the opposite side is the DC feeder protection device of traction substation B, and the two form bilateral power supply; if the position of the inter-zone disconnector is closed, the opposite side is the DC feeder protection device of traction substation A, and the two form a large bilateral power supply.

[0030] The DC feeder protection device in traction substation C obtains the real-time position of the inter-regional isolating switch of traction substation D: if the inter-regional isolating switch is in the open position, the DC feeder protection device of traction substation D is on the opposite side, and the two form a bilateral power supply; if the inter-regional isolating switch is in the closed position, the DC feeder protection device of traction substation E is on the opposite side, and the two form a large bilateral power supply;

[0031] The DC feeder protection device in traction substation C obtains the real-time position of the inter-regional isolating switch of traction substation D: if the inter-regional isolating switch is in the open position, the DC feeder protection device of traction substation D is on the opposite side, and the two form a bilateral power supply; if the inter-regional isolating switch is in the closed position, the DC feeder protection device of traction substation E is on the opposite side, and the two form a large bilateral power supply;

[0032] The DC negative pole protection device of traction substation C can obtain the real-time positions of the above four inter-zone disconnectors, and obtain the opposite-side DC feeder protection devices corresponding to each of the four DC feeder protection devices in traction substation C according to the real-time positions of the inter-zone disconnectors.

[0033] Preferably, when the DC feeder protection device is in protection action, the double-side tripping of the DC feeder protection is performed as follows:

[0034] When the DC feeder protection device of the traction substation is activated, the circuit breaker controlled by the DC feeder protection device is tripped, and a GOOSE bilateral tripping signal is sent to the DC feeder protection device on the opposite side. After receiving the signal, the DC feeder protection device on the opposite side trips the circuit breaker it controls.

[0035] Preferably, when a circuit breaker controlled by the DC protection device fails, the internal / bilateral tripping scheme for executing the DC circuit breaker failure protection specifically includes:

[0036] When the failure protection of the circuit breaker controlled by the DC feeder protection device or the energy-feed brake protection device of the traction substation is activated, a GOOSE failure protection station internal tripping signal is sent to the DC feeder protection device, the DC feeder protection device and the energy-feed brake protection device in the traction substation. After receiving the GOOSE failure protection station internal tripping signal, the above protection devices of the traction substation trip the circuit breaker controlled by them and lock the closing;

[0037] When the circuit breaker failure protection of the DC feeder protection device is activated, the DC feeder protection device sends a GOOSE failure protection internal inline trip signal to the DC feeder protection device, DC incoming line protection device and energy feed braking protection device in the traction substation, and sends a GOOSE failure protection bilateral inline trip signal to the DC feeder protection device on the opposite side; the above protection devices that receive the GOOSE failure protection internal inline trip signal or the GOOSE failure protection bilateral inline trip signal trip the circuit breaker they control and lock the closing.

[0038] Preferably, for the frame leakage protection action, when the rectifier cabinet frame current protection or the negative cabinet frame current protection of the DC negative pole protection device of the traction substation is activated: the DC negative pole protection device will send a GOOSE frame current FP-1 inter-trip signal to the DC incoming line protection device of the station, and after the DC incoming line protection device receives the GOOSE frame current FP-1 inter-trip signal, it will trip the DC incoming line circuit breaker in the traction substation and lock the closing.

[0039] Preferably, for the frame leakage protection action, when the energy-feed brake cabinet frame current protection of the DC negative pole protection device of the traction substation is activated: the DC negative pole protection device will send a GOOSE frame current FP-3 action signal to the energy-feed brake protection device of this station, and the energy-feed brake protection device will trip the DC circuit breaker of this station and lock the closing after receiving the GOOSE frame current FP-3 action signal.

[0040] Preferably, for the frame leakage protection action, when the DC cabinet frame voltage protection of the DC negative pole protection device of the traction substation is activated: the DC negative pole protection device will send a GOOSE frame voltage inter-trip signal to the DC feeder protection device, DC incoming line protection device and energy feedback braking protection device in the traction substation, and the above protection devices will trip the DC circuit breaker and lock the closing after receiving the GOOSE frame voltage inter-trip signal.

[0041] Preferably, for the frame leakage protection action, when the positive cabinet frame current protection of the DC negative pole protection device of the traction substation is activated: the DC negative pole protection device will send a GOOSE frame current FP-2 inline trip signal to the DC feeder protection device, DC incoming line protection device and energy feed braking protection device in the station, and send a GOOSE frame current FP-2 bilateral trip signal to the DC feeder protection devices on the opposite sides of each feeder in the station. Each DC protection device that receives the GOOSE frame current FP-2 inline trip signal or the GOOSE frame current FP-2 bilateral trip signal will trip the circuit breaker it controls and lock the closing.

[0042] The present invention also proposes a subway DC protection inter-tripping system based on GOOSE networking communication, comprising: a GOOSE network construction module, a fault state identification module and an inter-tripping action execution module;

[0043] The GOOSE network construction module is used to build a GOOSE network using a fiber optic switch in a subway traction substation;

[0044] The fault state identification module is used to obtain the type of protection action issued by the protection device configured in the subway traction substation, including DC feeder protection action, DC circuit breaker failure fault protection action and frame leakage protection action;

[0045] The inter-trip action execution module is used to execute the corresponding inter-trip scheme according to the protection action type.

[0046] The present invention also provides a terminal, comprising a processor and a storage medium;

[0047] The storage medium is used to store instructions;

[0048] The processor is used to operate according to the instruction to execute the steps of the subway DC protection joint tripping method based on GOOSE networking communication.

[0049] The present invention also proposes a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the steps of the subway DC protection tripping method based on GOOSE networking communication are implemented.

[0050] The beneficial effect of the present invention is that, compared with the prior art, the subway DC protection inter-tripping method proposed by the present invention is a network protection scheme based on GOOSE communication technology, and a GOOSE network is established through an optical fiber switch, so that each protection device in the subway traction substation is equipped with a GOOSE communication board and a GOOSE optical port, and the secondary control cable between DC protection components is completely abandoned, and the efficient and stable transmission of inter-tripping signals of various protection mechanisms and the precise control of the inter-tripping range are realized; in the DC feeder protection link, the device determines the inter-tripping object by monitoring the state of the inter-zone isolating switch of the neighboring station, and directly sends The system outputs a trip command, realizing efficient tripping without signal relay in the large bilateral power supply mode; for circuit breaker failure protection, a double tripping strategy is designed, which is applied to the relay protection devices of DC incoming line / energy feeder and DC feeder circuit breaker respectively; in the frame leakage protection, four sets of independent tripping logics are designed according to the current and voltage leakage conditions of different DC cabinet frames. These logics are deployed on the DC negative pole protection device to ensure the precise control of the tripping range; the present invention realizes the networking of subway DC protection, and has the technical effects of simple and clear network structure, easy compatibility and expansion, comprehensive tripping function and high real-time performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 A schematic flow chart of a subway DC protection joint tripping method based on GOOSE networking communication according to the present invention;

[0052] Figure 2 It is a structural schematic diagram of a subway DC traction power supply system applied by a subway DC protection joint tripping method based on GOOSE networking communication of the present invention;

[0053] Figure 3 The hardware configuration in a single typical traction substation and the GOOSE network topology diagram in a subway DC protection joint tripping method based on GOOSE networking communication of the present invention;

[0054] Figure 4 A schematic diagram of a DC feeder protection bilateral joint trip logic in a subway DC protection joint trip method based on GOOSE networking communication of the present invention;

[0055] Figure 5 It is a logic diagram of failure protection inter-tripping of a DC incoming line circuit breaker and a power-feed brake circuit breaker in a subway DC protection inter-tripping method based on GOOSE networking communication of the present invention;

[0056] Figure 6 A schematic diagram of the DC feeder circuit breaker failure protection inter-tripping logic in a subway DC protection inter-tripping method based on GOOSE networking communication of the present invention;

[0057] Figure 7A schematic diagram of the protection logic of the DC incoming cabinet frame in a subway DC protection joint tripping method based on GOOSE networking communication of the present invention;

[0058] Figure 8 A schematic diagram of DC feeder cabinet frame protection logic in a subway DC protection joint tripping method based on GOOSE networking communication of the present invention;

[0059] Fig. 9 It is a logic diagram of energy-feed brake cabinet frame protection in a subway DC protection joint trip method based on GOOSE networking communication of the present invention;

[0060] Fig.10 A schematic diagram of the negative pole cabinet frame protection logic in a subway DC protection joint tripping method based on GOOSE networking communication of the present invention;

[0061] Fig.11 The present invention is a structural schematic diagram of a subway DC protection inter-tripping system based on GOOSE networking communication. DETAILED DESCRIPTION

[0062] In order to make the purpose, technical scheme and advantages of the present invention clearer, the technical scheme of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The embodiments described in this application are only part of the embodiments of the present invention, not all of them. Based on the spirit of the present invention, other embodiments obtained by ordinary technicians in this field without creative work are all within the scope of protection of the present invention.

[0063] like Figure 1 As shown, the present invention proposes a subway DC protection joint tripping method based on GOOSE networking communication, and the method comprises the following steps:

[0064] Step 1: Use fiber optic switches to build a GOOSE network in the traction substation of the subway line;

[0065] The present invention adds an optical fiber switch in the existing subway traction substation, and the DC protection device in the traction substation is equipped with a GOOSE communication board.

[0066] Preferably, the optical fiber switch can be an IEC61850 optical fiber switch, and each DC protection device is connected to the IEC61850 optical fiber switch using optical fiber, and the switches of two adjacent stations are also connected using optical fiber.

[0067] Each traction substation can be equipped with one IEC61850 fiber optic switch to form a network, or two to form a dual-star PRP parallel redundant network.

[0068] like Figure 2 ,3 As shown, the DC protection devices in each traction substation of this scheme include 4 DC feeder protection devices, 1 DC negative pole protection device, 2 DC incoming line protection devices, 1 energy-feed brake protection device and 1 IEC61850 optical fiber switch. Two IEC61850 optical fiber switches can also be configured to form a dual-star PRP parallel redundant network.

[0069] Each of the above protection devices is equipped with a GOOSE communication card, which is equipped with a GOOSE optical port for GOOSE communication, and each protection device is connected to the IEC61850 switch using optical fiber;

[0070] The entire subway line is composed of multiple subway traction substations, and the switches of two adjacent substations are connected by optical fiber.

[0071] like Figure 2 As shown, for the traction substation C in the subway line, the DC protection device in the traction substation C can communicate with the DC protection device in the substation itself, and can communicate with the DC protection devices of the adjacent traction substation B in the downstream direction and the next adjacent traction substation A in the same direction. The DC protection device in the traction substation C can also communicate with the DC protection devices of the adjacent traction substation D in the upstream direction and the next adjacent traction substation E in the same direction.

[0072] Step 2: Execute the corresponding joint tripping scheme according to the type of protection action issued by the DC protection device configured in the traction substation:

[0073] Under normal circumstances, two adjacent DC feeder protection devices located in the same power supply section will send the open and close positions of their respective inter-zone disconnectors to each other and the DC negative pole protection device of the other traction substation through GOOSE.

[0074] by Figure 2 Taking the traction substation C in the example, when the GOOSE network continues to operate normally, the DC feeder protection device 211 of the traction substation C can obtain the real-time position of the inter-zone disconnector 2113 of the traction substation B; the DC feeder protection device 212 of the traction substation C can obtain the real-time position of the inter-zone disconnector 2124 of the traction substation B; the DC feeder protection device 213 obtains the real-time position of the inter-zone disconnector 2113 of the traction substation D; the DC feeder protection device 214 obtains the real-time position of the inter-zone disconnector 2124 of the traction substation D; the DC negative pole protection device of the traction substation C can obtain the real-time positions of all four inter-zone disconnectors of the traction substations B and D.

[0075] When the protection devices configured in the subway traction substation have the following protections, a GOOSE trip signal will be issued: DC feeder protection, DC circuit breaker failure protection and frame leakage protection; the specific trip schemes under each protection action are as follows:

[0076] For DC feeder protection action:

[0077] like Figure 4 As shown, when the DC feeder cabinet trolley is in the working position and the interlocking function of the protection device is enabled, when the DC feeder protection device protection actions such as current quick-break, overcurrent, current rise rate, high current tripping, thermal protection, etc. occur, the DC feeder protection device on this side trips the circuit breaker it controls and sends a GOOSE bilateral interlocking signal to the DC feeder protection device on the opposite side to trip the circuit breaker controlled by the DC feeder protection device on the opposite side.

[0078] Specifically, Figure 2 As shown, the four DC feeder protection devices 211-214 in each traction substation are closed, and continuous power is provided to the DC contact network through the feeder. At this time, the cross-zone disconnectors 2113 and 2124 are disconnected. For each traction substation, the DC feeder 211 in this substation and the DC feeder 213 of the adjacent substation in the downstream direction are on opposite sides to each other, and together they supply power to the left contact network of the same section, forming a power supply arm (also called a power supply partition); the DC feeder 212 of this substation and the DC feeder 214 of the adjacent substation in the downstream direction are on opposite sides to each other, and together they supply power to the right contact network of the same section, forming a power supply arm; the DC feeder protection device 213 of this substation and the DC feeder protection device 211 of the adjacent substation in the upstream direction are on opposite sides to each other, and together they supply power to the left contact network of the same section, forming a power supply arm; the DC feeder 214 of this substation and the DC feeder 212 of the adjacent substation in the upstream direction are on opposite sides to each other, and together they supply power to the right contact network of the same section, forming a power supply arm.

[0079] When traction substation B is out of operation, the cross-zone disconnectors 2113 and 2124 of traction substation B are closed, connecting the two sections of contact network AB and BC into a long section of AC contact network. The circuit breakers of the DC feeder protection device 213 of traction substation A and the DC feeder protection device 211 of traction substation C are closed, and the two are opposite to each other and form a power supply arm with the AC left line contact network, which is called large double-sided power supply; the DC feeder protection device 214 of traction substation A and the DC feeder protection device 212 of traction substation C are closed on the opposite sides to form a large double-sided power supply for the right line.

[0080] by Figure 2 Take the output GOOSE bilateral tripping of the DC feeder protection device 213 of the traction substation C as an example. Figure 4 As shown in FIG. 1 , the bilateral tripping scheme for DC feeder protection includes the following steps:

[0081] (1) When the inter-zone disconnector 2113 of traction substation D is in the open position, the DC feeder protection device 213 of traction substation C and the DC feeder protection device 211 of traction substation D form a bilateral power supply. When the DC feeder protection device 213 of traction substation C is in protection action, it sends a GOOSE bilateral trip signal to the DC feeder protection device 211 of traction substation D. After receiving the signal, the DC feeder protection device 211 of traction substation D trips the circuit breaker.

[0082] (2) When the inter-zone disconnector 2113 of traction substation D is in the closed position, the DC feeder protection device 213 of traction substation C and the DC feeder protection device 211 of traction substation E form a large bilateral power supply. When the DC feeder protection device 213 of traction substation C is in protection action, it will send a GOOSE bilateral trip signal to the DC feeder protection device 211 of traction substation E. After receiving the signal, the DC feeder protection device 211 of traction substation E trips the circuit breaker.

[0083] According to the above steps, the bilateral joint tripping action process of the subway DC feeder protection is finally completed.

[0084] When the circuit breaker controlled by the DC protection device fails, the DC circuit breaker failure protection internal / bilateral tripping is executed, including the DC protection device sending a GOOSE failure protection internal / bilateral tripping signal to the circuit breakers controlled by all DC protection devices in the traction substation and the DC feeder protection device on the opposite side, so as to trip and lock the circuit breaker controlled by the DC protection device on this side and the circuit breaker controlled by the DC feeder protection device on the opposite side; specifically, Figure 5 , 6 As shown in the figure, for the fault state of the circuit breaker controlled by the DC protection device:

[0085] When the failure protection of the circuit breaker controlled by the DC feeder protection device or the energy-feed brake protection device of the traction substation is activated, a GOOSE failure protection station internal tripping signal is sent to the DC feeder protection device, the DC feeder protection device and the energy-feed brake protection device in the traction substation. After receiving the GOOSE failure protection station internal tripping signal, the above protection devices of the traction substation trip the circuit breaker controlled by them and lock the closing;

[0086] When the circuit breaker failure protection of the DC feeder protection device is activated, the DC feeder protection device sends a GOOSE failure protection internal inline trip signal to the DC feeder protection device, DC incoming line protection device and energy feed braking protection device in the traction substation, and sends a GOOSE failure protection bilateral inline trip signal to the DC feeder protection device on the opposite side; the above protection devices that receive the GOOSE failure protection internal inline trip signal or the GOOSE failure protection bilateral inline trip signal trip the circuit breaker they control and lock the closing.

[0087] Combination Figure 2 When the DC circuit breaker cabinet trolley is in the working position and the failure protection function of the protection device is enabled, when the DC circuit breaker failure protection is triggered, the internal / bilateral tripping scheme of the DC circuit breaker failure protection is executed, as follows:

[0088] (1) When the failure protection of the DC feeder or energy-feed brake circuit breaker of the traction substation is activated, a GOOSE failure protection internal tripping signal will be sent to the circuit breakers controlled by the DC feeder protection device, DC feeder protection device and energy-feed brake protection device in the traction substation. After receiving the signal, the DC protection device will trip the circuit breaker controlled by it and lock the closing.

[0089] (2) When the DC feeder device circuit breaker fails to protect the device, Figure 2 Take the DC feeder protection device 214 of traction substation A in the example: the DC feeder protection device 214 of traction substation A fails to protect, and sends a GOOSE failure protection in-house trip signal to all DC circuit breaker protection devices in the station, tripping and locking the DC circuit breaker of the station. At the same time, the opening and closing position of traction substation B2124 is judged. When 2124 is in the open position, the DC feeder protection device 214 of traction substation A sends a GOOSE failure protection bilateral trip signal to the DC feeder protection device 212 of traction substation B. After receiving the signal, traction substation B212 trips and locks the circuit breaker; when traction substation B2124 is in the closed position, traction substation A214 sends a GOOSE failure protection bilateral trip signal to traction substation C212. After receiving the signal, traction substation C212 trips and locks the circuit breaker.

[0090] According to the above steps, the internal / bilateral joint tripping action process of the subway DC circuit breaker failure protection is finally completed.

[0091] For the frame leakage fault state: different joint trip schemes are executed according to the different objects of the protection action, such as Figures 7-10 As shown, the details are as follows:

[0092] (1) When the rectifier cabinet or negative cabinet frame current protection of the DC negative pole protection device is activated, the DC negative pole protection device will send a GOOSE frame current FP-1 joint trip signal to the DC incoming line protection device 201 and the DC incoming line protection device 202 of the institute. After receiving the signal, the DC incoming line protection device 201 and the DC incoming line protection device 202 will trip the circuit breaker and lock the switch.

[0093] (2) When the energy-feed brake cabinet frame current protection of the DC negative pole protection device is activated, the DC negative pole protection device will send a GOOSE frame current FP-3 action signal to the energy-feed brake protection device 219 of the institute. After receiving the signal, the energy-feed brake protection device 219 trips the DC circuit breaker and locks the switch.

[0094] (3) When the frame voltage protection of the DC negative pole protection device is activated, the protection device will send a GOOSE frame voltage trip signal to all DC circuit breaker cabinet protection devices in the station. After receiving the signal, the protection device trips the DC circuit breaker and locks the closing.

[0095] (4) When the positive cabinet frame current protection of the DC negative pole protection device is activated, Figure 2Taking the positive cabinet frame of traction substation C in the example, the DC negative pole protection device will send the GOOSE frame current FP-2 inline trip signal to all DC circuit breaker cabinet protection devices of traction substation C, tripping and locking the DC circuit breakers in the station. At the same time, the GOOSE frame current FP-2 bilateral trip signal is sent to the DC feeder protection devices on the up and down bidirectional opposite sides of the left line, and the DC feeder protection devices on the up and down bidirectional opposite sides of the right line, tripping and locking a total of 4 feeder circuit breakers on both sides of the left and right lines. That is, when the cross-zone isolating switches 2113 and 2124 of the traction substation B on the downstream side are both in the open position, the DC negative pole protection device of traction substation C sends a GOOSE framework current FP-2 bilateral trip signal to the DC feeder protection devices 213 and 214 of traction substation B. When the cross-zone isolating switches 2113 or 2124 of traction substation B are in the closed position, the DC negative pole protection device of traction substation C responds accordingly and sends a GOOSE framework current FP-2 bilateral trip signal to the DC feeder protection device 213 (traction substation B 2113 is in the closed position) or the DC feeder protection device 214 (traction substation B 2124 is in the closed position) of traction substation A; similarly, when the traction substation on the upstream side is When the inter-region disconnectors 2113 and 2124 of traction substation D are both in open position, the DC negative pole protection device of traction substation C sends a GOOSE frame current FP-2 bilateral trip signal to the DC feeder protection devices 211 and 212 of traction substation D. When the inter-region disconnectors 2113 or 2124 of traction substation D are in closed position, the DC negative pole protection device of traction substation C responds accordingly and sends a GOOSE frame current FP-2 bilateral trip signal to the DC feeder protection device 211 (the inter-region disconnector 2113 of traction substation D is in closed position) or the DC feeder protection device 212 (the inter-region disconnector 2124 of traction substation D is in closed position) of traction substation E. After receiving the signal, the protection device trips and locks the circuit breaker.

[0096] According to the above steps, the internal / bilateral joint tripping action process of the subway DC cabinet frame leakage protection is finally completed.

[0097] like Fig.11 As shown, the present invention also proposes a subway DC protection inter-tripping system based on GOOSE networking communication, which is used to implement the above-mentioned subway DC protection inter-tripping method based on GOOSE networking communication. The system includes: a GOOSE network construction module, a fault state identification module and an inter-tripping action execution module;

[0098] The GOOSE network construction module is used to build a GOOSE network using a fiber optic switch in a subway traction substation;

[0099] The fault state identification module is used to obtain the type of protection action issued by the protection device configured in the subway traction substation, including DC feeder protection action, DC circuit breaker failure fault protection action and frame leakage protection action;

[0100] The inter-trip action execution module is used to execute the corresponding inter-trip scheme according to the protection action type.

[0101] The beneficial effect of the present invention is that, compared with the prior art, the network protection scheme based on GOOSE communication technology forms a GOOSE network through an optical fiber switch, so that each protection device in the subway traction substation is equipped with a GOOSE communication board and a GOOSE optical port, completely abandoning the secondary control cable between DC protection components, and realizing efficient and stable transmission of multiple protection mechanism joint trip signals and precise control of the joint trip range. The scheme realizes the networking of subway DC protection, and has the technical effects of simple and clear network structure, easy compatibility and expansion, comprehensive joint trip function, and high real-time performance.

[0102] The present disclosure may be a system, a method and / or a computer program product. The computer program product may include a computer-readable storage medium carrying computer-readable program instructions for causing a processor to implement various aspects of the present disclosure.

[0103] A computer-readable storage medium may be a tangible device that can hold and store instructions used by an instruction execution device. A computer-readable storage medium may be, for example, but not limited to, an electrical storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any suitable combination of the foregoing. More specific examples of computer-readable storage media (a non-exhaustive list) include: a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a static random access memory (SRAM), a portable compact disk read-only memory (CD-ROM), a digital versatile disk (DVD), a memory stick, a floppy disk, a mechanical encoding device, such as a punch card or a raised structure in a groove on which instructions are stored, and any suitable combination of the foregoing. As used herein, a computer-readable storage medium is not to be interpreted as a transient signal per se, such as a radio wave or other freely propagating electromagnetic wave, an electromagnetic wave propagating through a waveguide or other transmission medium (e.g., a light pulse through a fiber optic cable), or an electrical signal transmitted through a wire.

[0104] The computer-readable program instructions described herein can be downloaded from a computer-readable storage medium to each computing / processing device, or downloaded to an external computer or external storage device via a network, such as the Internet, a local area network, a wide area network, and / or a wireless network. The network can include copper transmission cables, optical fiber transmissions, wireless transmissions, routers, firewalls, switches, gateway computers, and / or edge servers. The network adapter card or network interface in each computing / processing device receives the computer-readable program instructions from the network and forwards the computer-readable program instructions for storage in the computer-readable storage medium in each computing / processing device.

[0105] The computer program instructions for performing the operation of the present disclosure may be assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine-related instructions, microcode, firmware instructions, state setting data, or source code or object code written in any combination of one or more programming languages, including object-oriented programming languages, such as Smalltalk, C++, etc., and conventional procedural programming languages, such as "C" language or similar programming languages. Computer-readable program instructions may be executed completely on a user's computer, partially on a user's computer, as an independent software package, partially on a user's computer, partially on a remote computer, or completely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer via any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., using an Internet service provider to connect via the Internet). In some embodiments, an electronic circuit, such as a programmable logic circuit, a field programmable gate array (FPGA), or a programmable logic array (PLA), may be customized by utilizing the state information of the computer-readable program instructions, and the electronic circuit may execute the computer-readable program instructions, thereby realizing various aspects of the present disclosure.

[0106] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents, and any modifications or equivalent replacements that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A subway DC protection tripping method based on GOOSE networking communication, characterized in that: The steps include: In the traction substation of the subway line, a GOOSE network is built using fiber optic switches; According to the type of protection action issued by the DC protection device configured in the traction substation, the corresponding tripping plan is executed: When the DC feeder protection device is in action, the DC feeder protection bilateral tripping is executed, including the DC feeder protection device on this side tripping the circuit breaker it controls, and sending a GOOSE bilateral tripping signal to the DC feeder protection device on the opposite side to trip the circuit breaker controlled by the DC feeder protection device on the opposite side; When the circuit breaker controlled by the DC protection device fails, the DC circuit breaker failure protection internal / bilateral tripping is executed, including the DC protection device sending a GOOSE failure protection internal / bilateral tripping signal to the DC feeder protection device, DC incoming line protection device, energy-feed brake protection device and the DC feeder protection device on the opposite side in the traction substation, so as to trip and lock the circuit breaker controlled by the DC protection device on this side and the circuit breaker controlled by the DC feeder protection device on the opposite side; When frame leakage protection occurs, corresponding interlocking actions are performed according to the current and voltage leakage conditions of different DC cabinet frames.

2. The subway DC protection joint tripping method based on GOOSE networking communication according to claim 1 is characterized in that: The use of optical fiber switches to construct a GOOSE network specifically includes: An IEC61850 optical fiber switch is configured in the subway traction substation. The DC protection device in the traction substation is equipped with a GOOSE communication board. Each DC protection device in the subway traction substation is connected to the IEC61850 optical fiber switch using optical fiber. The switches of two adjacent stations are also connected using optical fiber. Among them, the DC protection devices include 4 DC feeder protection devices, 1 DC negative pole protection device, 2 DC incoming line protection devices and 1 energy-feed brake protection device; For the traction substation C in the subway line, the DC protection device in the traction substation C can communicate with the DC protection device in the substation itself, as well as with the DC protection devices of the adjacent traction substation B in the downstream direction and the next adjacent traction substation A in the same direction. The DC protection device in the traction substation C can also communicate with the DC protection devices of the adjacent traction substation D in the upstream direction and the next adjacent traction substation E in the same direction.

3. The subway DC protection joint tripping method based on GOOSE networking communication according to claim 2 is characterized in that: When the GOOSE network operates normally, the DC feeder protection device and the DC negative pole protection device in the traction substation C can obtain the real-time positions of the inter-zone disconnectors located in the traction substation B and the traction substation D, and determine the opposite DC feeder protection device of each DC feeder protection device in the traction substation accordingly, as follows: The DC feeder protection device in traction substation C obtains the real-time position of the inter-regional isolating switch of traction substation B: if the inter-regional isolating switch is in the open position, the DC feeder protection device of traction substation B is on the opposite side, and the two form a bilateral power supply; if the inter-regional isolating switch is in the closed position, the DC feeder protection device of traction substation A is on the opposite side, and the two form a large bilateral power supply; The DC feeder protection device in traction substation C obtains the real-time position of the inter-regional isolating switch of traction substation B: if the inter-regional isolating switch is in the open position, the DC feeder protection device of traction substation B is on the opposite side, and the two form a bilateral power supply; if the inter-regional isolating switch is in the closed position, the DC feeder protection device of traction substation A is on the opposite side, and the two form a large bilateral power supply; The DC feeder protection device in traction substation C obtains the real-time position of the inter-regional isolating switch of traction substation D: if the inter-regional isolating switch is in the open position, the DC feeder protection device of traction substation D is on the opposite side, and the two form a bilateral power supply; if the inter-regional isolating switch is in the closed position, the DC feeder protection device of traction substation E is on the opposite side, and the two form a large bilateral power supply; The DC feeder protection device in traction substation C obtains the real-time position of the inter-regional isolating switch of traction substation D: if the inter-regional isolating switch is in the open position, the DC feeder protection device of traction substation D is on the opposite side, and the two form a bilateral power supply; if the inter-regional isolating switch is in the closed position, the DC feeder protection device of traction substation E is on the opposite side, and the two form a large bilateral power supply; The DC negative pole protection device of traction substation C can obtain the real-time positions of the above four inter-zone disconnectors, and obtain the opposite-side DC feeder protection devices corresponding to each of the four DC feeder protection devices in traction substation C according to the real-time positions of the inter-zone disconnectors.

4. The subway DC protection joint tripping method based on GOOSE networking communication according to claim 3 is characterized in that: When the DC feeder protection device is in action, the double-side tripping of the DC feeder protection is performed as follows: When the DC feeder protection device of the traction substation is activated, the circuit breaker controlled by the DC feeder protection device is tripped, and a GOOSE bilateral tripping signal is sent to the DC feeder protection device on the opposite side. After receiving the signal, the DC feeder protection device on the opposite side trips the circuit breaker it controls.

5. The subway DC protection joint tripping method based on GOOSE networking communication according to claim 3 is characterized in that: When the circuit breaker controlled by the DC protection device fails, the internal / bilateral tripping scheme for executing the DC circuit breaker failure protection specifically includes: When the failure protection of the circuit breaker controlled by the DC feeder protection device or the energy-feed brake protection device of the traction substation is activated, a GOOSE failure protection station internal tripping signal is sent to the DC feeder protection device, the DC feeder protection device and the energy-feed brake protection device in the traction substation. After receiving the GOOSE failure protection station internal tripping signal, the above protection devices of the traction substation trip the circuit breaker controlled by them and lock the closing; When the circuit breaker failure protection of the DC feeder protection device is activated, the DC feeder protection device sends a GOOSE failure protection internal inline trip signal to the DC feeder protection device, DC incoming line protection device and energy feed braking protection device in the traction substation, and sends a GOOSE failure protection bilateral inline trip signal to the DC feeder protection device on the opposite side; the above protection devices that receive the GOOSE failure protection internal inline trip signal or the GOOSE failure protection bilateral inline trip signal trip the circuit breaker they control and lock the closing.

6. The subway DC protection joint tripping method based on GOOSE networking communication according to claim 3 is characterized in that: For the frame leakage protection action, when the rectifier cabinet frame current protection or the negative cabinet frame current protection of the DC negative pole protection device of the traction substation is activated: the DC negative pole protection device will send a GOOSE frame current FP-1 inter-trip signal to the DC incoming line protection device of the station. After the DC incoming line protection device receives the GOOSE frame current FP-1 inter-trip signal, it will trip the DC incoming line circuit breaker in the traction substation and lock the closing.

7. The subway DC protection joint tripping method based on GOOSE networking communication according to claim 3 is characterized in that: For the frame leakage protection action, when the energy-feed brake cabinet frame current protection of the DC negative pole protection device of the traction substation is activated: the DC negative pole protection device will send a GOOSE frame current FP-3 action signal to the energy-feed brake protection device of this station. After receiving the GOOSE frame current FP-3 action signal, the energy-feed brake protection device will trip the DC circuit breaker of this station and lock the closing.

8. The subway DC protection joint tripping method based on GOOSE networking communication according to claim 3 is characterized in that: For frame leakage protection, when the DC cabinet frame voltage protection of the DC negative pole protection device of the traction substation is activated: the DC negative pole protection device will send a GOOSE frame voltage interlocking signal to the DC feeder protection device, DC incoming line protection device and energy feedback braking protection device in the traction substation. After receiving the GOOSE frame voltage interlocking signal, the above protection devices will trip the DC circuit breaker and lock the closing.

9. The subway DC protection joint tripping method based on GOOSE networking communication according to claim 3 is characterized in that: For the frame leakage protection action, when the positive cabinet frame current protection of the DC negative pole protection device of the traction substation is activated: the DC negative pole protection device will send a GOOSE frame current FP-2 inline trip signal to the DC feeder protection device, DC incoming line protection device and energy feed braking protection device in the station, and send a GOOSE frame current FP-2 bilateral trip signal to the DC feeder protection device on the opposite side of each feeder in the station. The above-mentioned DC protection devices that receive the GOOSE frame current FP-2 inline trip signal or the GOOSE frame current FP-2 bilateral trip signal will trip the circuit breaker they control and lock the closing.

10. A subway DC protection tripping system based on GOOSE networking communication using the method according to any one of claims 1 to 9, characterized in that: include: GOOSE network building module, fault status identification module and joint jump action execution module; The GOOSE network construction module is used to build a GOOSE network using a fiber optic switch in a subway traction substation; The fault state identification module is used to obtain the type of protection action issued by the protection device configured in the subway traction substation, including DC feeder protection action, DC circuit breaker failure fault protection action and frame leakage protection action; The inter-trip action execution module is used to execute the corresponding inter-trip scheme according to the protection action type.

11. A terminal comprising a processor and a storage medium; characterized in that: The storage medium is used to store instructions; The processor is configured to operate according to the instructions to execute the steps of the method according to any one of claims 1-9.

12. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the steps of the method according to any one of claims 1 to 9 are implemented.

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