A multi-bus traction substation self-healing reconfiguration failure recovery power supply method and system

Abstract

A kind of multi-bus traction substation self-healing reconfiguration failure recovery power supply method and system, including: in situ self-healing reconfiguration action, bus fault power supply low voltage side breaker refuses to divide, corresponding switch is locked by GOOSE signal, preset switch number constant value, breaker time delay is gradually opened in the criterion of switch number satisfaction, spare power supply high voltage side breaker time delay is closed, spare power supply low voltage side breaker has no blocking signal, then time delay is gradually closed in the criterion of switch number satisfaction, in situ self-healing reconfiguration action, bus spare power supply low voltage side breaker refuses to close, breaker time delay is gradually closed in the criterion of switch number satisfaction.The present application has the advantages that: when the self-healing action fails due to the failure of self-healing reconfiguration process, the bus will not stop power recovery, and the power supply range can be maximized, avoiding the power failure of non-fault phase bus, the present application does not need to add new equipment, and can be realized by upgrading the existing protection device.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of power system relay protection, and particularly relates to a self-healing reconstruction failure power recovery method and system for a multi-bus traction substation. BACKGROUND

[0002] Ideally, when an incoming line fault or a transformer fault occurs, the self-healing reconstruction system of the substation issues a series of instructions to trip the high and low voltage side breakers of the faulty power supply, and the high and low voltage side breakers of the standby power supply are sequentially closed to restore power supply to the bus.

[0003] Problems:

[0004] Problem 1: If any of the low voltage side breakers of the faulty power supply fails to trip, the self-healing reconstruction process stops, and for a multi-bus substation, the breakers that have not failed subsequently no longer participate in the self-healing reconstruction action of the substation, especially the low voltage side breakers of the non-faulty phase of the standby power supply no longer automatically close, which may result in power failure of all phase buses.

[0005] Problem 2: If any of the low voltage side breakers of the standby power supply fails to close, the self-healing reconstruction process stops, and at this time, the high and low voltage side breakers of the faulty power supply have all been tripped, and the low voltage side breakers of the standby power supply with switch numbers greater than the switch numbers of the breakers that have failed to close also do not close, resulting in that even if the subsequent switches can normally close to restore power supply to the bus, the reconstruction process is interrupted due to the failure to close alarm, the self-healing reconstruction action is exited, and the power supply range of the bus is not maximized. SUMMARY

[0006] To solve the above problems, the application provides a self-healing reconstruction failure power recovery method and system for a multi-bus traction substation, which can correctly execute corresponding actions to restore power supply according to the failure signal when the self-healing reconstruction fails due to the failure to open or close during the self-healing reconstruction process of the substation, ensure that only the bus supplied by the failed switch is powered off, and maximize the restoration of the power supply range of the bus.

[0007] To achieve the above purpose, the technical solution adopted by the application is as follows:

[0008] A self-healing reconstruction failure power recovery method for a multi-bus traction substation, the traction substation including two incoming lines as power supply and standby power supply, and the same number of low voltage side lines of the two incoming lines are respectively connected to corresponding buses; the method comprises:

[0009] When a power supply fails, the self-healing reconfiguration action in the power supply, when the fault power supply low-voltage side breaker occurs a refusal to split alarm, the standby power supply low-voltage side bus breaker is blocked, if the fault power supply low-voltage side breaker number is greater than the refusal to split breaker number, the low-voltage breaker tripping time delay is sequentially sent, otherwise it does not act; the standby power supply high-voltage side breaker is closed after the high-voltage breaker time delay; the corresponding number of standby power supply low-voltage side breaker is sequentially closed after the first low-voltage breaker closing time delay, otherwise the standby power supply low-voltage side breaker does not act.

[0010] The self-healing reconfiguration action in the power supply, the fault power supply low-voltage side breaker is split, the standby power supply high-voltage side breaker is closed, when the standby power supply low-voltage side breaker occurs a refusal to close alarm, the standby power supply low-voltage side breaker greater than the refusal to close breaker number is sequentially closed after the second low-voltage breaker closing time delay, otherwise it does not act.

[0011] The application further comprises the following preferred schemes.

[0012] Further, the low-voltage side breaker number P is set, and the P is equal to the number of the power supply or standby power supply low-voltage side breaker;

[0013] The low-voltage side breaker switch action time interval t is set.

[0014] Further, the power supply low-voltage side breaker number and the standby power supply low-voltage side breaker number are set,

[0015] The power supply low-voltage side breaker number is set from left to right from 1, the standby power supply low-voltage side breaker number is set from left to right from 1, and the same number of power supply low-voltage side breaker and standby power supply low-voltage side breaker are connected to the same bus of the traction substation.

[0016] Further, when the fault power supply low-voltage side breaker occurs a refusal to split alarm, the transformer protection device in the power supply is blocked by the GOOSE signal to close the same number of standby power supply low-voltage side breaker.

[0017] Further, the transformer protection device in the standby power supply uses the GOOSE signal to determine that the low-voltage side breaker of the local side incoming line has no closing blocking signal and the same number of breaker on the opposite side, i.e. the power supply side, is split, and then determines that the power supply side breaker has no refusal to split signal.

[0018] Further, the fault power supply low-voltage side breaker greater than the refusal to split breaker number is sequentially sent by the low-voltage breaker tripping time delay,

[0019] The low-voltage breaker tripping time delay is:

[0020] TFN = t x (N - M),

[0021] Wherein, t is the low voltage side breaker switch action time interval setting value, N is the fault power low voltage side breaker number, M is the fault power low voltage side breaker number sending the refusal to share alarm signal, TFN is the number N of the fault power low voltage side breaker opening time delay.

[0022] Further, the standby power high voltage side breaker is automatically closed through the high voltage breaker time delay, and the high voltage breaker time delay TH is calculated according to the following formula:

[0023] TH = t x (P - M + 1),

[0024] Wherein, P is a low voltage side breaker number setting value, M is the breaker switch number of the fault power low voltage side sending the refusal to share alarm signal.

[0025] Further, if the fault power low voltage side breaker has no refusal to share signal, the corresponding number standby power low voltage side breaker is gradually closed through the first low voltage breaker closing time delay, and the first low voltage breaker closing time delay THN1 is calculated according to the following formula:

[0026] THN1 = t x N,

[0027] THN1 is the first low voltage breaker closing time delay of the number N of the standby power low voltage side breaker, and N is the standby power low voltage side breaker number.

[0028] Further, the standby power low voltage side breaker with the breaker number greater than the refusal to share breaker number is gradually closed through the second low voltage breaker closing time delay, and the second low voltage breaker closing time delay THN2 is calculated according to the following formula:

[0029] THN2 = t x (N - K),

[0030] THN2 is the second low voltage breaker closing time delay of the number N of the standby power low voltage side breaker, N is the standby power low voltage side breaker number, and K is the breaker number of the standby power low voltage side sending the refusal to share alarm signal.

[0031] The application also claims a multi-bus traction substation self-healing reconfiguration failure recovery power supply system using the aforementioned self-healing reconfiguration failure recovery power supply method, characterized in that:

[0032] The self-recovery reconfiguration failure recovery power supply system comprises a self-recovery starting module, a self-recovery reconfiguration failure judgment and exit module, a GOOSE signal locking module, a fault power supply low-voltage side breaker refusal to separate alarm module, a fault power supply low-voltage side breaker delay step-by-step tripping control module, a standby power supply high-voltage side breaker delay closing control module, a standby power supply low-voltage side breaker refusal to close alarm module, and a standby power supply low-voltage side breaker delay step-by-step closing control module.

[0033] The self-recovery starting module in the fault power supply is used to start the self-recovery reconfiguration action when the power supply fails, and the fault power supply low-voltage side breaker refusal to separate alarm module is used to send an alarm signal when the fault power supply low-voltage side breaker refuses to separate.

[0034] When the fault power supply low-voltage side breaker refuses to separate, the self-recovery reconfiguration failure judgment and exit module judges the self-recovery reconfiguration failure and exits the self-recovery process, and controls the GOOSE signal locking module to lock the standby power supply low-voltage side breaker with the same number as the refused-to-separate breaker.

[0035] The fault power supply low-voltage side breaker delay step-by-step tripping control module controls the low-voltage breakers with numbers greater than that of the refused-to-separate breaker to send tripping signals step by step through a low-voltage breaker tripping time delay.

[0036] The standby power supply high-voltage side breaker delay closing control module controls the standby power supply high-voltage side breaker to close through a high-voltage breaker time delay.

[0037] When the standby power supply low-voltage side breaker refuses to close, the standby power supply low-voltage side breaker refusal to close alarm module sends an alarm signal.

[0038] The standby power supply low-voltage side breaker delay step-by-step closing control module is used to control the standby power supply low-voltage side breaker to close step by step according to the corresponding delay when the fault power supply low-voltage side breaker refuses to separate or the standby power supply low-voltage side breaker refuses to close.

[0039] The self-recovery reconfiguration failure recovery power supply system further comprises a low-voltage side breaker number setting value module and a low-voltage side breaker switch action time interval setting value module.

[0040] The low-voltage side breaker number setting value module sets a low-voltage side breaker number setting value P, wherein the P is equal to the number of the power supply or standby power supply low-voltage side breakers.

[0041] The low-voltage side breaker switch action time interval setting value module sets a low-voltage side breaker switch action time interval setting value t.

[0042] Further,

[0043] The self-recovery reconfiguration failure recovery power supply system further comprises a breaker number setting module.

[0044] The circuit breaker number setting module sets the power low-voltage side circuit breaker number from left to right starting from 1, sets the standby power low-voltage side circuit breaker number from left to right starting from 1, and the power low-voltage side circuit breaker with the same number and the standby power low-voltage side circuit breaker are connected to the same bus of the traction substation.

[0045] Further,

[0046] When the fault power low-voltage side circuit breaker occurs a refusal to distribute alarm, the GOOSE signal blocking module blocks the closing of the standby power low-voltage side circuit breaker with the same number as the refused circuit breaker.

[0047] Further,

[0048] If the standby power in-substation transformer protection device does not receive the blocking signal sent by the GOOSE signal blocking module, it is determined that the low-voltage side circuit breaker of the in-substation has no closing blocking signal and the same number circuit breaker on the opposite side, i.e., the power side, is in the distribution position, and it is determined that the power side circuit breaker has no refusal signal.

[0049] Further,

[0050] The fault power low-voltage side circuit breaker delay step-by-step distribution control module sends a distribution signal to the fault power low-voltage side circuit breaker with a number greater than the refused circuit breaker number through a low-voltage circuit breaker distribution time delay step-by-step,

[0051] The low-voltage circuit breaker distribution time delay is:

[0052] TFN=t×(N-M),

[0053] wherein t is the set low-voltage side circuit breaker switch action time interval constant value, N is the number of the fault power low-voltage side circuit breaker, M is the number of the circuit breaker sending the refusal alarm signal of the fault power low-voltage side, and TFN is the distribution time delay of the fault power low-voltage side circuit breaker with the number N.

[0054] Further,

[0055] The standby power high-voltage side circuit breaker delay closing control module controls the standby power high-voltage side circuit breaker to automatically close through a high-voltage circuit breaker time delay TH, and the high-voltage circuit breaker time delay TH is calculated according to the following formula:

[0056] TH=t×(P-M+1),

[0057] wherein P is the number of low-voltage side circuit breakers set constant value, and M is the number of the refused switch of the circuit breaker sending the refusal alarm signal of the fault power low-voltage side.

[0058] Further,

[0059] If the fault power low-voltage side breaker has no refusal to break signal, the standby power low-voltage side breaker delay step-by-step closing control module controls the corresponding numbered standby power low-voltage side breaker to be closed step by step through a first low-voltage breaker closing time delay, and the first low-voltage breaker closing time delay THN1 is calculated according to the following formula:

[0060] THN1=t×N,

[0061] THN1 is the first low-voltage breaker closing time delay of the standby power low-voltage side breaker numbered N, and N is the number of the standby power low-voltage side breaker.

[0062] Further,

[0063] The standby power low-voltage side breaker delay step-by-step closing control module controls the standby power low-voltage side breaker with a breaker number greater than the refusal to close breaker number to be closed step by step through a second low-voltage breaker closing time delay, and the second low-voltage breaker closing time delay THN2 is calculated according to the following formula:

[0064] THN2=t×(N-K),

[0065] THN2 is the second low-voltage breaker closing time delay of the standby power low-voltage side breaker numbered N, N is the number of the standby power low-voltage side breaker, and K is the number of the breaker of the standby power low-voltage side that has a refusal to close alarm signal.

[0066] An electronic device comprises a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein the processor implements the steps of the multi-bus traction substation self-healing reconstruction failure recovery power supply method when executing the computer program.

[0067] The present application has the following advantages:

[0068] When a refusal to break or refusal to close failure occurs during the self-healing reconstruction process, the bus will not stop recovering power supply, and the remaining low-voltage side breakers can correctly perform corresponding actions to recover power supply according to the refusal signal, ensuring that only the refused switch power supply bus is powered off, maximizing the recovery of bus power supply range, and avoiding non-fault phase bus power failure due to self-healing action failure. BRIEF DESCRIPTION OF DRAWINGS

[0069] Figure 1 It is a schematic diagram of a multi-bus traction substation.

[0070] Figure 2 It is a flowchart of an embodiment of the multi-bus traction substation self-healing reconstruction failure recovery power supply method of the present application. DETAILED DESCRIPTION

[0071] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present application. The embodiments described in the present application are only a part of the embodiments of the present application, rather than all the embodiments. Based on the spirit of the present application, all other embodiments obtained by those skilled in the art without creative work shall fall within the protection scope of the present application.

[0072] The application discloses a self-recovery reconfiguration failure recovery power supply method for a multi-bus traction substation.

[0073] When a power supply fails, self-recovery reconfiguration is performed in the power supply, when a fault power supply low-voltage side breaker occurs a refusal to divide alarm, the standby power supply low-voltage side breaker is blocked to close the same bus breaker, if the fault power supply low-voltage side breaker number is greater than the refusal to divide breaker number, a step-by-step opening signal is sent through a low-voltage breaker opening time delay, otherwise, no action is taken; the standby power supply high-voltage side breaker is closed through a high-voltage breaker time delay; if there is no refusal signal for the fault power supply low-voltage side breaker, the corresponding number of standby power supply low-voltage side breakers is gradually closed through a first low-voltage breaker closing time delay, otherwise, the standby power supply low-voltage side breaker does not act.

[0074] Self-recovery reconfiguration is performed in the power supply, the fault power supply low-voltage side breakers are opened, and the standby power supply high-voltage side breaker is closed, when a refusal to close alarm occurs in the standby power supply low-voltage side breaker, the standby power supply low-voltage side breaker with a number greater than the refusal to close breaker number is gradually closed through a second low-voltage breaker closing time delay, otherwise, no action is taken.

[0075] A low-voltage side breaker number P is set, and the P is equal to the number of the power supply or standby power supply low-voltage side breakers. A low-voltage side breaker switch action time interval t is set.

[0076] The power supply low-voltage side breaker number and the standby power supply low-voltage side breaker number are set, the power supply low-voltage side breaker number is set from left to right starting from 1, the standby power supply low-voltage side breaker number is set from left to right starting from 1, and the power supply low-voltage side breaker with the same number and the standby power supply low-voltage side breaker are connected to the same bus of the traction substation.

[0077] When a refusal to divide alarm occurs in the fault power supply low-voltage side breaker, the transformer protection device in the power supply side blocks the standby power supply low-voltage side breaker with the same number as the refusal to divide breaker to close through a GOOSE signal. The transformer protection device in the standby power supply side uses a GOOSE signal to determine that there is no closing blocking signal for the low-voltage side breaker in the side and the same number breaker is in the power supply side, and then determines that the power supply side breaker has no refusal signal.

[0078] The person skilled in the art can set the low-voltage circuit breaker opening time delay in a step-by-step increasing manner according to the needs under the spirit of the present application; set the high-voltage circuit breaker closing time delay as needed; set the first low-voltage circuit breaker closing time delay and the second low-voltage circuit breaker closing time delay in a step-by-step increasing manner.

[0079] In the preferred embodiment of the present application, the low-voltage circuit breaker opening time delay, the high-voltage circuit breaker closing time delay, the first low-voltage circuit breaker closing time delay and the second low-voltage circuit breaker closing time delay are calculated in the following manner. It should be noted that this preferred embodiment is only for obtaining better technical effects and does not limit the spirit of the present application.

[0080] The fault power supply low-voltage side circuit breaker greater than the number of circuit breakers that refuse to open sends an opening signal step by step after the low-voltage circuit breaker opening time delay,

[0081] Each low-voltage circuit breaker opening time delay is:

[0082] TFN = t × (N - M),

[0083] where t is the set low-voltage side circuit breaker switch action time interval constant, N is the number of fault power supply low-voltage side circuit breakers, M is the number of circuit breakers that send a refusal-to-open alarm signal on the fault power supply low-voltage side, and TFN is the opening time delay of the fault power supply low-voltage side circuit breaker numbered N.

[0084] The standby power supply high-voltage side circuit breaker automatically closes after the high-voltage circuit breaker time delay TH, which is calculated according to the following formula:

[0085] TH = t × (P - M + 1),

[0086] where P is a set low-voltage side circuit breaker number constant, and M is the number of circuit breakers that send a refusal-to-open alarm signal on the fault power supply low-voltage side.

[0087] If there is no refusal-to-open signal for the fault power supply low-voltage side circuit breaker, the corresponding numbered standby power supply low-voltage side circuit breaker closes step by step after the first low-voltage circuit breaker closing time delay THN1, which is calculated according to the following formula:

[0088] THN1 = t × N,

[0089] THN1 is the first low-voltage circuit breaker closing time delay of the standby power supply low-voltage side circuit breaker numbered N, and N is the number of standby power supply low-voltage side circuit breakers.

[0090] The spare power low-voltage side circuit breaker with a number greater than the number of the refused-to-close circuit breaker is gradually closed through a second low-voltage circuit breaker closing time delay, and the second low-voltage circuit breaker closing time delay THN2 is calculated according to the following formula:

[0091] THN2=t×(N-K),

[0092] THN2 is the second low-voltage circuit breaker closing time delay of the spare power low-voltage side circuit breaker with a number N, N is the number of the spare power low-voltage side circuit breaker, and K is the number of the refused-to-close circuit breaker of the spare power low-voltage side.

[0093] The application further discloses a multi-bus traction substation self-recovery reconfiguration failure power recovery system using the self-recovery reconfiguration failure power recovery method.

[0094] The self-recovery reconfiguration failure power recovery system comprises a self-recovery starting module, a self-recovery reconfiguration failure judgment and exit module, a GOOSE signal locking module, a fault power low-voltage side circuit breaker refused-to-close alarm module, a fault power low-voltage side circuit breaker delay step-by-step opening control module, a spare power high-voltage side circuit breaker delay closing control module, a spare power low-voltage side circuit breaker refused-to-close alarm module and a spare power low-voltage side circuit breaker delay step-by-step closing control module.

[0095] The fault power self-recovery starting module is used for starting the self-recovery reconfiguration action when the power fails, and the fault power low-voltage side circuit breaker refused-to-close alarm module is used for sending an alarm signal when the fault power low-voltage side circuit breaker refuses to close.

[0096] When the fault power low-voltage side circuit breaker refuses to close, the self-recovery reconfiguration failure judgment and exit module judges the self-recovery reconfiguration failure and exits the self-recovery process, and controls the GOOSE signal locking module to lock the closing of the spare power low-voltage side circuit breaker with the same number as the refused-to-close circuit breaker.

[0097] The fault power low-voltage side circuit breaker delay step-by-step opening control module controls the low-voltage circuit breaker with a number greater than the number of the refused-to-close circuit breaker to send an opening signal through a low-voltage circuit breaker opening time delay.

[0098] The spare power high-voltage side circuit breaker delay closing control module controls the spare power high-voltage side circuit breaker to close through a high-voltage circuit breaker time delay.

[0099] When the spare power low-voltage side circuit breaker refuses to close, the spare power low-voltage side circuit breaker refused-to-close alarm module sends an alarm signal.

[0100] The spare power low-voltage side circuit breaker delay step-by-step closing control module is used for controlling the spare power low-voltage side circuit breaker to close step by step according to the corresponding delay when the fault power low-voltage side circuit breaker refuses to close or the spare power low-voltage side circuit breaker refuses to close.

[0101] The self-recovery reconfiguration failure recovery power supply system further comprises a low-voltage side breaker number setting module and a low-voltage side breaker switch action time interval setting module.

[0102] The low-voltage side breaker number setting module sets a low-voltage side breaker number setting value P, wherein the P is equal to the number of the low-voltage side breakers of the power supply or the standby power supply.

[0103] The low-voltage side breaker switch action time interval setting module sets a low-voltage side breaker switch action time interval setting value t.

[0104] The self-recovery reconfiguration failure recovery power supply system further comprises a breaker number setting module.

[0105] The breaker number setting module sets the number of the low-voltage side breakers of the power supply from left to right starting from 1, sets the number of the low-voltage side breakers of the standby power supply from left to right starting from 1, and the low-voltage side breakers of the power supply and the low-voltage side breakers of the standby power supply with the same number are connected to the same bus of the traction substation.

[0106] When the fault low-voltage side breaker of the power supply generates a refusal to distribute alarm, the GOOSE signal blocking module blocks the closing of the low-voltage side breaker of the standby power supply with the same number as the refusal to distribute breaker. If the transformer protection device in the standby power supply does not receive the blocking signal sent by the GOOSE signal blocking module, it is determined that the low-voltage side breaker of the local side has no closing blocking signal and the breaker on the opposite side, i.e., the low-voltage side breaker of the power supply, is in the distribution position, and it is determined that the low-voltage side breaker of the power supply has no refusal to distribute signal.

[0107] In the preferred embodiment of the self-recovery reconfiguration failure recovery power supply system of the multi-bus traction substation, the way of calculating the low-voltage breaker opening time delay, the high-voltage breaker closing time delay, the first low-voltage breaker closing time delay and the second low-voltage breaker closing time delay is the same as the self-recovery reconfiguration failure recovery power supply method of the multi-bus traction substation, which will not be described here.

[0108] The application will be further described below with reference to the accompanying drawings Figure 1 and the accompanying drawings Figure 2 The application will be further described below with reference to the accompanying drawings

[0109] The application will be further described below with reference to the accompanying drawings

[0110] As Figure 1As shown, during normal operation, the 1st incoming line 1BQF, 1B.1 to 1B.5 are closed to supply power to the bus A-E, and the 2nd incoming line 2BQF, 2B.1 to 2B.5 are opened as the standby power supply of the bus. The switch action time interval setting value t is set to 0.1 s, the low voltage side switch number setting value P is set to 5, the switch numbers of 1B.1 to 1B.5 are set to 1 to 5 in turn, and the switch numbers of 2B.1 to 2B.5 are set to 1 to 5 in turn.

[0111] Case 1: 1st incoming line power failure, 1B.1 refuses to open alarm

[0112] The 1st incoming line power failure, the 1B self-healing in the substation is started, the 1B.1 breaker refuses to open alarm, the self-healing reconstruction fails to exit the self-healing process, the 1B protection device uses the GOOSE signal to block the 2B.1 closing, the switch numbers of 1B.2 to 1B.5 are greater than 1B.1, so the closing signals are sent after 1B.2 to 1B.5 pass through TFN = 0.1 x (N-1) in turn, i.e. 1B.2 to 1B.5 pass through 0.1 s, 0.2 s, 0.3 s, 0.4 s in turn to open. The 2BQF closes after passing through TH = t x (P-M+1) i.e. 0.1 x (5-1+1) = 0.5 s, the 2B.1 does not act due to the GOOSE closing signal sent by the 1B protection device, and the 2B.2 to 2B.5 close after passing through THN1 = t x N after the 2BQF closes, i.e. 2B.2 to 2B.5 pass through 0.2 s, 0.3 s, 0.4 s, 0.5 s in turn to close, the bus B-E restores power supply, and only the bus A is powered off.

[0113] Case 2: 1st incoming line power failure, 1B.5 refuses to open alarm

[0114] The 1st incoming line power failure, the 1B self-healing in the substation is started, the 1B.1 to 1B.4 successfully open, the 1B.5 breaker refuses to open alarm, the self-healing reconstruction fails to exit the self-healing process, the 1B protection device uses the GOOSE signal to block the 2B.5 closing, the switch numbers of 1B.1 to 1B.4 are less than 1B.5, i.e. they have successfully opened, so they do not act, the 2BQF closes after passing through TH = t x (P-M+1) i.e. 0.1 x (5-5+1) = 0.1 s, the 2B.5 does not act due to the GOOSE closing signal sent by the 1B protection device, and the 2B.1 to 2B.4 close after passing through THN1 = t x N after the 2BQF closes, i.e. 2B.1 to 2B.4 pass through 0.1 s, 0.2 s, 0.3 s, 0.4 s in turn to close, the bus A-D restores power supply, and only the bus E is powered off.

[0115] Case 3: 1st incoming line power failure, 2B.1 refuses to close alarm

[0116] 1# incoming line power failure, 1B substation self-healing starts, 1B.1 to 1B.5 successfully open, 2BQF successfully closes, 2B.1 refuses to close alarm, substation self-healing reconfiguration fails to exit self-healing process, 2B.2 to 2B.5 switch numbers are greater than 2B.1, so they are closed after THN2 = 0.1 x (N-M), i.e. 2B.2 to 2B.5 are closed after 0.1 s, 0.2 s, 0.3 s, 0.4 s respectively, busbar B-E restores power supply, only busbar A is powered off.

[0117] Case 4: 1# incoming line power failure, 2B.4 refuses to close alarm

[0118] 1# incoming line power failure, 1B substation self-healing starts, 1B.1 to 1B.5 successfully open, 2BQF, 2B.1 to 2B.3 all successfully close, 2B.4 refuses to close alarm, substation self-healing reconfiguration fails to exit self-healing process, 2B.1 to 2B.3 switch numbers are less than 2B.4, i.e. they have been successfully closed, so no action is taken, 2B.5 is closed after THN2 = 0.1 x (N-M), i.e. 0.1 x (5-4) = 0.1 s, busbars A-C, E restore power supply, only busbar D is powered off.

[0119] The present disclosure can also be a system, a method, and / or a computer program product. The computer program product can include a computer readable storage medium (or media) having computer readable program instructions thereon for causing a processor to carry out aspects of the present disclosure.

[0120] The computer readable storage medium can be a tangible device that can retain and store instructions for use by an instruction execution device. The computer readable storage medium can be, for example, but is not limited to, an electronic 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. A non-exhaustive list of more specific examples of the computer readable storage medium includes the following: a portable computer diskette, 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 disc read-only memory (CD-ROM), a digital versatile disk (DVD), a memory stick, a floppy disk, a mechanically encoded device such as punch-cards or punched-tape, and any suitable combination of the foregoing. A computer readable storage medium, as used herein, is not to be construed as being transitory signals per se, such as radio waves or other freely propagating electromagnetic waves, electromagnetic waves propagating through a waveguide or other transmission media (e.g., light pulses passing through a fiber-optic cable), or electrical signals transmitted through a wire.

[0121] Computer readable program instructions described herein can be downloaded to respective computing / processing devices from a computer readable storage medium or to an external computer or external storage device via a network, for example, the Internet, a local area network, a wide area network and / or a wireless network. The network can comprise copper transmission cables, optical transmission fibers, wireless transmission, routers, firewalls, switches, gateway computers and / or edge servers. A network adaptation card or network interface in each computing / processing device receives computer readable program instructions from the network and forwards the computer readable program instructions for storage in a computer readable storage medium within the respective computing / processing device.

[0122] Computer readable program instructions for carrying out operations of the present disclosure can be assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine dependent instructions, microcode, firmware instructions, state setting data, or any combination of one or more of the above in any combination of one or more programming languages including an object oriented programming language such as Smalltalk, C++ or the like and conventional procedural programming languages such as the "C" programming language or similar programming languages. The computer readable program instructions can execute entirely on a user's computing device, partly on the user's computing device, as a stand-alone software package, partly on the user's computing device and partly on a remote computing device or entirely on the remote computing device or server. In the latter scenario, the remote computing device can be connected to the user's computing device through any kind of network, including a local area network (LAN) or a wide area network (WAN), or the connection can be made to an external computing device, for example, through the Internet using an Internet Service Provider. In some embodiments, the various aspects of the present disclosure can be implemented by a computer readable program instructions of a personal computer, a special purpose computer, a programmed microprocessor or microcontroller, peripheral integrated circuit elements, an integrated circuit having other programmable elements, a graphics processing unit, a hard-wired electronic or logic circuit such as a discrete element circuit, a Central Processing Unit (CPU), a Field

[0123] The technical scheme of the present application has the following beneficial effects:

[0124] 1. When the self-healing action fails due to the refusal to split or the refusal to join fault in the self-healing reconstruction process, the bus will not stop the power supply;

[0125] 2. It can ensure that the bus powered by the refused switch is powered off, and the power supply range of the bus can be maximally restored;

[0126] 3. The present application does not need to add new equipment, and can be realized by upgrading the program of the existing protection device.

[0127] The above describes the basic principles, main features and advantages of the patent. Those skilled in the art should understand that the patent is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the patent. Without departing from the spirit and scope of the patent, various changes and improvements can be made to the patent, and these changes and improvements all fall within the scope of the claimed patent. The scope of the patent claimed is limited by the appended claims and their equivalents.

Claims

1. A method for restoring power supply after self-healing reconfiguration failure in a multi-bus traction substation, wherein the traction substation includes two incoming lines serving as a power source and a backup power source respectively, and the two incoming lines, having the same number of low-voltage side lines, are respectively connected to the corresponding busbars; characterized in that, The method includes: In the event of a power failure, the self-healing reconfiguration mechanism within the faulty power supply will activate. If the low-voltage side circuit breaker of the faulty power supply fails to trip, the closing of the low-voltage side circuit breaker of the backup power supply connected to the same busbar will be blocked. If the circuit breaker number on the low-voltage side of the faulty power supply is greater than the number of the circuit breaker that failed to trip, a tripping signal will be issued step by step after the low-voltage circuit breaker tripping time delay; otherwise, no action will be taken. The high-voltage side circuit breaker of the backup power supply will close after the high-voltage circuit breaker time delay. If there is no tripping signal from the low-voltage side circuit breaker of the faulty power supply, the corresponding numbered low-voltage side circuit breaker of the backup power supply will close step by step after the first low-voltage circuit breaker closing time delay; otherwise, the low-voltage side circuit breaker of this phase of the backup power supply will not operate. When the self-healing reconfiguration action is performed within the station, all circuit breakers on the low-voltage side of the faulty power supply are opened, and the circuit breakers on the high-voltage side of the backup power supply are closed. When a circuit breaker on the low-voltage side of the backup power supply fails to close, the circuit breakers on the low-voltage side of the backup power supply with numbers greater than the number of the circuit breaker that failed to close are closed step by step after the closing time of the second low-voltage circuit breaker; otherwise, no action is taken.

2. The method for restoring power supply after self-healing reconfiguration failure in a multi-bus traction substation according to claim 1, characterized in that: Set a low-voltage side circuit breaker number set value P, where P is equal to the number of low-voltage side circuit breakers for the power supply or backup power supply. Set the operating time interval t of the low-voltage side circuit breaker switch.

3. The method for restoring power supply after self-healing reconfiguration failure in a multi-bus traction substation according to claim 2, characterized in that: Set the circuit breaker numbers for the low-voltage side of the mains power supply and the low-voltage side of the backup power supply. The low-voltage circuit breakers of the power supply are numbered from left to right starting from 1, and the low-voltage circuit breakers of the backup power supply are numbered from left to right starting from 1. The low-voltage circuit breakers of the power supply and the backup power supply with the same number are connected to the same busbar of the traction substation.

4. The method for restoring power supply after self-healing reconfiguration failure in a multi-bus traction substation according to claim 1 or 3, characterized in that: When the low-voltage side circuit breaker of the faulty power supply fails to trip, the transformer protection device in the faulty power supply substation blocks the closing of the low-voltage side circuit breaker of the backup power supply with the same circuit breaker number as the one that failed to trip via the GOOSE signal.

5. The method for restoring power supply after self-healing reconfiguration failure in a multi-bus traction substation according to claim 4, characterized in that: The transformer protection device in the backup power supply station uses the GOOSE signal to determine that the circuit breaker on the low-voltage side of the incoming line on this side has no closing lockout signal and the circuit breaker with the same number on the opposite side (i.e., the power supply side) is open. Then it is determined that the circuit breaker on the power supply side has no failure to open signal.

6. The method for restoring power supply after self-healing reconfiguration failure in a multi-bus traction substation according to claim 1 or 3, characterized in that: For faulty power supplies with numbers greater than the number of the circuit breaker that refused to trip, the low-voltage side circuit breakers issue tripping signals step by step after the low-voltage circuit breaker tripping time delay. The tripping time delay for each low-voltage circuit breaker is as follows: TFN = t × (NM), Where t is the set time interval for the low-voltage side circuit breaker to operate, N is the circuit breaker number on the low-voltage side of the faulty power supply, M is the circuit breaker number that issued the failure to open alarm signal on the low-voltage side of the faulty power supply, and TFN is the opening time delay of the low-voltage side circuit breaker with the number N.

7. The method for restoring power supply after self-healing reconfiguration failure in a multi-bus traction substation according to claim 6, characterized in that: The backup power supply high-voltage side circuit breaker automatically closes after a high-voltage circuit breaker time delay TH, which is calculated using the following formula: TH = t × (P - M + 1), Wherein, P is a low-voltage side circuit breaker setting value, and M is the circuit breaker failure switch number that issued the failure-to-open alarm signal on the low-voltage side of the fault power supply.

8. The method for restoring power supply after self-healing reconfiguration failure in a multi-bus traction substation according to claim 7, characterized in that: If the low-voltage side circuit breaker of the faulty power supply has no tripping signal, the corresponding backup power supply low-voltage side circuit breaker will close sequentially after the closing time delay of the first low-voltage circuit breaker. The closing time delay THN1 of the first low-voltage circuit breaker is calculated according to the following formula: THN1 = t × N, THN1 is the closing time delay of the first low-voltage circuit breaker of the backup power supply low-voltage side circuit breaker numbered N, where N is the number of the backup power supply low-voltage side circuit breaker.

9. The method for restoring power supply after self-healing reconfiguration failure in a multi-bus traction substation according to claim 8, characterized in that: The standby low-voltage side circuit breaker with a circuit breaker number greater than the circuit breaker number that failed to close is closed in stages after the closing time delay of the second low-voltage circuit breaker. The closing time delay THN2 of the second low-voltage circuit breaker is calculated according to the following formula: THN2=t×(NK), THN2 is the closing time delay of the second low-voltage circuit breaker of the backup power supply low-voltage side circuit breaker numbered N, where N is the circuit breaker number of the backup power supply low-voltage side circuit breaker, and K is the circuit breaker number of the backup power supply low-voltage side circuit breaker that triggered the failure to close alarm signal.

10. A self-healing reconfiguration failure recovery power supply system for a multi-bus traction substation utilizing the self-healing reconfiguration failure recovery power supply method according to any one of claims 1-9, characterized in that: The self-healing reconfiguration failure recovery power supply system includes a self-healing start module, a self-healing reconfiguration failure judgment and exit module, a GOOSE signal blocking module, a fault power supply low-voltage side circuit breaker failure to open alarm module, a fault power supply low-voltage side circuit breaker delayed step-by-step opening control module, a backup power supply high-voltage side circuit breaker delayed closing control module, a backup power supply low-voltage side circuit breaker failure to close alarm module, and a backup power supply low-voltage side circuit breaker delayed step-by-step closing control module. The self-healing start-up module in the fault power supply is used to initiate the self-healing reconfiguration action when the power supply fails, and the fault power supply low-voltage side circuit breaker failure alarm module is used to issue an alarm signal when the fault power supply low-voltage side circuit breaker fails to open. When the low-voltage side circuit breaker of the faulty power supply fails to trip, the self-healing reconfiguration failure judgment and exit module judges the self-healing reconfiguration failure and exits the self-healing process, and controls the GOOSE signal blocking module to block the closing of the backup power supply low-voltage side circuit breaker with the same number as the circuit breaker that failed to trip. The fault power supply low-voltage side circuit breaker delay-level tripping control module controls low-voltage circuit breakers with numbers greater than the number of circuit breakers that refuse to trip to issue tripping signals step by step after the low-voltage circuit breaker tripping time delay. The backup power high-voltage side circuit breaker delayed closing control module controls the backup power high-voltage side circuit breaker to close after a time delay following the high-voltage circuit breaker time. When the low-voltage side circuit breaker of the backup power supply fails to close, the low-voltage side circuit breaker failure to close alarm module of the backup power supply issues an alarm signal. The backup power supply low-voltage side circuit breaker delayed step-by-step closing control module is used to control the backup power supply low-voltage side circuit breaker to close step-by-step according to the corresponding delay when the fault power supply low-voltage side circuit breaker fails to open or the backup power supply low-voltage side circuit breaker fails to close.

11. The self-healing reconfiguration failure recovery power supply system for multi-bus traction substations according to claim 10, characterized in that: The self-healing reconfiguration failure recovery power supply system also includes a low-voltage side circuit breaker number setting module and a low-voltage side circuit breaker switch action time interval setting module. The low-voltage side circuit breaker number setting module sets the low-voltage side circuit breaker number setting value P, where P is equal to the number of low-voltage side circuit breakers of the power supply or backup power supply. The low-voltage side circuit breaker switch action time interval setting module sets the low-voltage side circuit breaker switch action time interval setting value t.

12. The self-healing reconfiguration failure recovery power supply system for multi-bus traction substations according to claim 11, characterized in that: The self-healing reconfiguration failure recovery power supply system also includes a circuit breaker number setting module; The circuit breaker numbering module sets the circuit breaker numbers on the low-voltage side of the power supply from left to right starting from 1, and sets the circuit breaker numbers on the low-voltage side of the backup power supply from left to right starting from 1. Circuit breakers on the low-voltage side of the power supply and circuit breakers on the backup power supply with the same number are connected to the same busbar in the traction substation.

13. The self-healing reconfiguration failure recovery power supply system for multi-bus traction substations according to claim 12, characterized in that: When the low-voltage side circuit breaker of the faulty power supply fails to trip, the GOOSE signal blocking module blocks the closing of the low-voltage side circuit breaker of the backup power supply with the same circuit breaker number as the one that failed to trip.

14. The self-healing reconfiguration failure recovery power supply system for multi-bus traction substations according to claim 13, characterized in that: If the transformer protection device in the backup power supply station does not receive a blocking signal from the GOOSE signal blocking module, it is determined that the low-voltage side circuit breaker of this side has no closing blocking signal and the circuit breaker with the same number on the opposite side (i.e., the power supply side) is open. Therefore, it is determined that the power supply side circuit breaker has no failure to open signal.

15. The self-healing reconfiguration failure recovery power supply system for multi-bus traction substations according to claim 14, characterized in that: The delayed-step tripping control module for low-voltage side circuit breakers of faulty power supplies issues tripping signals to low-voltage side circuit breakers with numbers greater than the circuit breaker number that refused to trip, after a delay in the low-voltage circuit breaker tripping time. The tripping time delay for each low-voltage circuit breaker is as follows: TFN = t × (NM), Where t is the set time interval for the low-voltage side circuit breaker to operate, N is the circuit breaker number on the low-voltage side of the faulty power supply, M is the circuit breaker number that issued the failure to open alarm signal on the low-voltage side of the faulty power supply, and TFN is the opening time delay of the low-voltage side circuit breaker with the number N.

16. The self-healing reconfiguration failure recovery power supply system for multi-bus traction substations according to claim 15, characterized in that: The backup power supply high-voltage side circuit breaker delayed closing control module controls the backup power supply high-voltage side circuit breaker to automatically close after a high-voltage circuit breaker time delay. The high-voltage circuit breaker time delay TH is calculated according to the following formula: TH = t × (P - M + 1), Wherein, P is a low-voltage side circuit breaker setting value, and M is the circuit breaker failure switch number that issued the failure-to-open alarm signal on the low-voltage side of the fault power supply.

17. The self-healing reconfiguration failure recovery power supply system for multi-bus traction substations according to claim 16, characterized in that: If the low-voltage side circuit breaker of the faulty power supply has no tripping signal, the delayed-step closing control module of the low-voltage side circuit breaker of the backup power supply will control the corresponding numbered low-voltage side circuit breaker of the backup power supply to close step by step after the closing time delay of the first low-voltage circuit breaker. The closing time delay THN1 of the first low-voltage circuit breaker is calculated according to the following formula: THN1 = t × N, THN1 is the closing time delay of the first low-voltage circuit breaker of the backup power supply low-voltage side circuit breaker numbered N, where N is the number of the backup power supply low-voltage side circuit breaker.

18. The self-healing reconfiguration failure recovery power supply system for multi-bus traction substations according to claim 17, characterized in that: The standby power supply low-voltage side circuit breaker delay-step closing control module controls the standby power supply low-voltage side circuit breakers with circuit breaker numbers greater than the circuit breaker numbers that failed to close to close to close in a step-by-step manner after the closing time delay of the second low-voltage circuit breaker. The closing time delay THN2 of the second low-voltage circuit breaker is calculated according to the following formula: THN2=t×(NK), THN2 is the closing time delay of the second low-voltage circuit breaker of the backup power supply low-voltage side circuit breaker numbered N, where N is the circuit breaker number of the backup power supply low-voltage side circuit breaker, and K is the circuit breaker number of the backup power supply low-voltage side circuit breaker that triggered the failure to close alarm signal.

19. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the steps of the method according to claims 1 to 9.

20. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to claims 1 to 9.

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