Regional inter-station spare power automatic switching device based on dispatching master station end and control method thereof

Abstract

The invention provides regional inter-station spare power automatic switching based on a dispatching master station end, which comprises a spare power automatic switching control module integrated in a D5000 intelligent dispatching control system of the dispatching master station end, and the spare power automatic switching control module acquires remote signaling and telemetering data acquired by the D5000 intelligent dispatching control system so as to perform regional inter-station spare power automatic switching control; compared with traditional spare power automatic switching, the spare power automatic switching control module between the regional stations can adjust branches of spare power supplies of two transformer substations at will according to the operation mode of a power grid, is more flexible and changeable, saves the space of the transformer substations, saves laying of secondary cables and optical cables, and greatly reduces the investment cost of the transformer substations.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of power grid control, and particularly relates to a regional inter-station backup power automatic switching based on a dispatch master station end and a control method thereof. BACKGROUND

[0002] At present, to realize the regional inter-station backup power automatic switching function, independent backup power automatic switching devices and inter-station communication optical cables need to be installed in two substations. This method needs to set up a separate screen cabinet in the secondary equipment room of each substation, and then install the backup power automatic switching device in the screen cabinet. This requires that the backup power automatic switching device be configured with an independent power supply air switch from the substation DC feeder screen and be laid with secondary cables to ensure that the backup power automatic switching device can work normally. At the same time, in order to enable it to have the regional inter-station backup power automatic switching logic function, it is also necessary to collect the opposite substation incoming line power switch position state through optical fibers, and collect the switch quantity signals and analog quantity signals such as bus voltage and incoming line current voltage of each power switch of the substation through secondary cables. At present, this inter-station backup power automatic switching not only uses the limited space of the substation secondary equipment room, but also needs to lay a large number of cables and communication optical cables. This invisibly increases the investment cost and the later maintenance cost of the substation.

[0003] In summary, since the prior art scheme needs to set up an independent screen cabinet in the substation and install a dedicated backup power automatic switching protection device, and in addition, the dedicated backup power automatic switching device also needs to be laid with a large number of cables and optical cables, there is the problem of high investment cost. Secondly, the prior art scheme also has the problem of limited operation mode: after the installation of the dedicated backup power automatic switching device, the switch quantity and analog quantity of the main and backup power sources will be fixed and cannot be changed, and the backup power automatic switching function of other branch power sources cannot be realized.

[0004] In view of this, the present application provides a regional inter-station backup power automatic switching based on a dispatch master station end and a control method thereof. SUMMARY

[0005] The present application aims to provide a regional inter-station backup power automatic switching based on a dispatch master station end and a control method thereof. A backup power automatic switching control module is integrated in the dispatch master station end D5000 intelligent dispatch control system. The backup power automatic switching control module references the switch quantity signals such as the positions of the main and backup power sources of two substations and the analog quantity signals such as the bus voltage and the current voltage of the main and backup power sources collected by the D5000 system to the backup power automatic switching control algorithm, and finally realizes the function of automatic switching of the main and backup power sources. Since the dispatch master station end D5000 intelligent dispatch control system collects the remote signaling and remote measurement data of all devices of two substations, the backup power automatic switching of the present application can adjust the branch of the main and backup power sources at will according to the operation mode of the power grid, thereby realizing the automatic switching function of the main and backup power sources under different operation modes. At the same time, it also saves the limited space of the substation secondary equipment room and the laying of secondary cables and optical cables, and reduces the construction investment cost of the substation.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows:

[0007] A regional inter-station backup automatic transfer system based on the dispatch master station includes a backup automatic transfer control module integrated into the D5000 intelligent dispatch control system at the dispatch master station. The backup automatic transfer control module acquires remote signaling and telemetry data collected by the D5000 intelligent dispatch control system to perform regional inter-station backup automatic transfer control.

[0008] The regional inter-station automatic transfer switch involves a total of 6 switches between any two substations, including the incoming switch, bus branch switch, and tie switch of substation A, and the incoming switch, bus branch switch, and tie switch of substation B. The incoming switch of substation A connects to the I section busbar and incoming power supply of substation A; the bus branch switch of substation A connects to the I section busbar and II section busbar of substation A; and the tie switch of substation A connects to the II section busbar of substation A and the tie switch of substation B. The incoming switch of substation B connects to the I section busbar and incoming power supply of substation B; the bus branch switch of substation B connects to the I section busbar and II section busbar of substation B; and the tie switch of substation B connects to the II section busbar of substation B and the tie switch of substation A.

[0009] A regional inter-station automatic transfer switch control method based on the dispatch master station terminal, wherein the regional inter-station automatic transfer switch control method is implemented based on the aforementioned automatic transfer switch control module; when substations A and B are in operating mode one, i.e., the tie switch of substation A is in the open position, and the incoming line switch and bus branch switch of substation A are in the closed position, and the tie switch, incoming line switch, and bus branch switch of substation B are in the closed position, the regional inter-station automatic transfer switch operation logic is as follows:

[0010] When the incoming power supply to substation A fails, the automatic transfer switch is activated. After a time delay of T1, a command to trip the incoming switch of substation A is sent. If the incoming switch of substation A does not trip, the automatic transfer switch logic stops operating. If the incoming switch of substation A trips, a command to close the tie switch of substation A is sent after a time delay of T2. At this time, the automatic transfer switch completes the entire operation logic.

[0011] When the incoming power supply to substation B fails, the automatic transfer switch is activated. After a time delay of T1, a command to trip the incoming switch of substation B is sent. If the incoming switch of substation B does not trip, the automatic transfer switch logic stops operating. If the incoming switch of substation B trips, a command to close the tie switch of substation A is sent after a time delay of T2. At this time, the automatic transfer switch completes the entire operation logic.

[0012] Preferably, when both substations A and B are in operating mode one, and the following five conditions are met simultaneously after a T0 delay, the inter-station automatic transfer mode one charging is completed:

[0013] (1) The bus voltages of sections I and II of substations A and B are both greater than the rated voltage U. set ;

[0014] (2) When the "Check standby power supply is energized" control word is activated, the voltage of the interconnection line of substation A is greater than the energized set value U. set Alternatively, the busbar of section II of substation B is energized and the tie switch of substation B is in the closed position; if the "Check standby power supply is energized" control word is not activated, this condition is not considered.

[0015] (3) The A substation tie switch is in the open position, and the A substation incoming line switch, bus branch switch and B substation tie switch, incoming line switch and bus branch switch are in the closed position; if the switch input of "single bus mode" is 1, the position of the bus branch switch is not determined.

[0016] (4) No interlocking backup automatic transfer signal;

[0017] (5) No circuit breaker position abnormal signal.

[0018] A regional inter-station automatic transfer switch control method based on the dispatch master station terminal, wherein the regional inter-station automatic transfer switch control method is implemented based on the aforementioned automatic transfer switch control module; when substations A and B are in operating mode two, i.e., the bus branch switch of substation A is in the open position, and the incoming line switch and tie switch of substation A are in the closed position, and the tie switch, incoming line switch, and bus branch switch of substation B are in the closed position, the regional inter-station automatic transfer switch operation logic is as follows:

[0019] When the incoming power supply to substation A fails, the automatic transfer switch is activated. After a time delay of T1, a command to trip the incoming switch of substation A is sent. If the incoming switch of substation A does not trip, the automatic transfer switch logic stops operating. If the incoming switch of substation A trips, a command to close the bus and branch switches of substation A is sent after a time delay of T2. At this time, the automatic transfer switch completes the entire operation logic.

[0020] When the incoming power supply to substation B fails, the automatic transfer switch is activated. After a time delay of T1, a command to trip the incoming switch of substation B is sent. If the incoming switch of substation B does not trip, the automatic transfer switch logic stops operating. If the incoming switch of substation B trips, a command to close the bus and branch switches of substation A is sent after a time delay of T2. At this time, the automatic transfer switch completes the entire operation logic.

[0021] Preferably, when both substations A and B are in operating mode two, and the following four conditions are met simultaneously after a T0 delay, the inter-station automatic transfer mode two charging is completed:

[0022] (1) The bus voltages of sections I and II of substations A and B are both greater than the rated voltage U. set ;

[0023] (2) The bus branch switch of substation A is in the open position, and the incoming switch and tie switch of substation A, as well as the tie switch, incoming switch and bus branch switch of substation B, are in the closed position.

[0024] (3) No interlocking backup automatic transfer signal;

[0025] (4) No circuit breaker position abnormal signal.

[0026] A regional inter-station automatic transfer switch control method based on the dispatch master station terminal, wherein the regional inter-station automatic transfer switch control method is implemented based on the aforementioned automatic transfer switch control module; when substations A and B are in operating mode three, i.e., the incoming line switch of substation A is in the open position, and the bus branch switch and tie switch of substation A are in the closed position, and the tie switch, incoming line switch, and bus branch switch of substation B are in the closed position, the regional inter-station automatic transfer switch operation logic is as follows:

[0027] When the power supply to substation A fails, the automatic transfer switch is activated. After a time delay of T1, a command to trip the power supply to substation A is sent. If the power supply to substation A does not trip, the automatic transfer switch logic stops operating. If the power supply to substation A trips, a command to close the incoming line switch of substation A is sent after a time delay of T2. At this time, the automatic transfer switch completes the entire operation logic.

[0028] When the incoming power supply to substation B fails, the automatic transfer switch is activated. After a time delay of T1, a command to trip the incoming switch of substation B is sent. If the incoming switch of substation B does not trip, the automatic transfer switch logic stops operating. If the incoming switch of substation B trips, a command to close the incoming switch of substation A is sent after a time delay of T2. At this time, the automatic transfer switch completes the entire operation logic.

[0029] Preferably, when both substations A and B are in operating mode three, and the following five conditions are met simultaneously and after a T0 delay, the inter-station automatic transfer mode three charging is completed:

[0030] (1) The bus voltages of sections I and II of substations A and B are both greater than the rated voltage U. set ;

[0031] (2) When the "Check standby power supply is energized" control word is activated, the voltage of the incoming power supply line of substation A is greater than the energized set value U. set If the "Check backup power supply is powered" control word is not activated, this condition is not considered.

[0032] (3) The incoming line switch of substation A is in the open position, and the bus branch switch and tie switch of substation A, as well as the tie switch, incoming line switch and bus branch switch of substation B are in the closed position; if the switch input of "single bus mode" is 1, the position of the bus branch switch is not determined.

[0033] (4) No interlocking backup automatic transfer signal;

[0034] (5) No circuit breaker position abnormal signal.

[0035] Compared with the prior art, the present invention has the following beneficial effects:

[0036] This invention proposes a regional inter-station automatic transfer switch and its control method based on the dispatch master station. Since the D5000 intelligent dispatch control system used in power grid dispatching not only collects switching and analog signals from each substation but also remotely controls each switch in each substation, this invention integrates a regional inter-station automatic transfer switch control module into the D5000 intelligent dispatch control system. This module incorporates the switching status of each power source in the substation, as well as analog signals such as bus voltage and backup power current and voltage, collected by the D5000 intelligent dispatch control system, into the regional inter-station automatic transfer switch control algorithm, ultimately realizing the regional inter-station automatic transfer switch function. Compared to traditional automatic transfer switches, the regional inter-station automatic transfer switch controller of this invention can arbitrarily adjust the backup power supply branches of two substations according to the power grid operation mode, making it more flexible and adaptable. Traditional automatic transfer switches, once designed, cannot change the backup power supply branches. Furthermore, the regional inter-station automatic transfer switch controller of this invention saves substation space and the laying of secondary cables and optical fibers, significantly reducing substation investment costs. Attached Figure Description

[0037] Figure 1 This is a schematic diagram showing two substations serving as backups for each other.

[0038] Figure 2 This is a block diagram of the inter-station backup automatic transfer control based on the D5000 intelligent control system at the dispatch master station.

[0039] Figure 3 This is a schematic diagram of the system's operating mode.

[0040] Figure 4 This is a schematic diagram of system operation mode two;

[0041] Figure 5 This is a schematic diagram of the third system operation mode. Detailed Implementation

[0042] The following is in conjunction with the appendix Figures 1-5 The technical solution of the present invention will be described in detail below.

[0043] The origins of the inter-station backup self-connection problem, such as... Figure 1 As shown, any two substations have a total of 6 switches. During normal operation, one switch is in the open position, and the other 5 are in the closed position. Conventional automatic transfer switches (ATS) within the two substations cannot provide mutual backup functionality between them. For example, Figure 1 When the open loop point is switch 2DL at station A, if a fault occurs at K3, station B will be unable to restore power supply because the conventional automatic transfer switch cannot function.

[0044] This invention integrates the regional inter-station automatic transfer function into the D5000 intelligent dispatch control system at the dispatch master station, enabling the automatic transfer function of any two power sources in two substations. Figure 2This is a block diagram of the automatic transfer switch (ATS) control system based on the D5000 intelligent control system at the dispatch master station. In the diagram, each substation transmits its remote signaling and telemetry information for each bay to the dispatch master station via the dispatch data network. The ATS control module only needs to associate the required remote signaling and telemetry data from the database. Simultaneously, the dispatcher can flexibly adjust the primary and backup power supply branches for inter-station ATS based on the system operating mode to ensure reliable grid operation.

[0045] The inter-station backup automatic power-on operation mode is as follows:

[0046] The method is the same Figure 3 As shown, in substation A, power supply switch 2DL is in the open position, while the other switches are in the closed position.

[0047] Its charging conditions are as follows:

[0048] 1. The voltage U of bus I and II of substations A and B I U II All are greater than the pressure setpoint U set , that is U I >U set And U II >U set ;

[0049] 2. When the "Check standby power supply voltage" control word is activated, the voltage U of power supply line 2 in substation A is... L2 Greater than the pressure set value U set , that is U L2 >U set Alternatively, the B substation's II busbar is energized and the B substation's 2DL busbar is in the closed position. If the "Check standby power supply is energized" function is not activated, this point can be disregarded.

[0050] 3. In substation A, power supply switch 2DL is in the open position, and other switches are in the closed position; when the single bus mode input is "1", the position of switch 3DL is not determined.

[0051] 4. No interlocking backup automatic transfer signal;

[0052] 5. No abnormal circuit breaker position signal;

[0053] If all five conditions are met simultaneously and there is a 10-second delay, the inter-station backup automatic switching method 1 charging is completed.

[0054] Its action logic is as follows:

[0055] When a power supply failure occurs at substation A, power supply switch 1DL of substation A trips, causing a complete power outage at substation A. The automatic transfer switch (ATS) is activated, sending a command to trip power supply switch 1DL of substation A after a time delay of T1. If power supply switch 1DL of substation A does not trip, the ATS logic stops operating. If power supply switch 1DL of substation A trips, a command to close power supply switch 2DL of substation A is sent after a time delay of T2. At this point, the ATS completes its entire operation.

[0056] When a power supply failure occurs at substation B, power supply switch 1DL of substation B trips, causing a complete power outage at substation B. The automatic transfer switch (ATS) is activated, sending a command to trip power supply switch 1DL of substation B after a time delay of T1. If power supply switch 1DL of substation B does not trip, the ATS logic stops operating. If power supply switch 1DL of substation B trips, a command to close power supply switch 2DL of substation A is sent after a time delay of T2. At this point, the ATS completes its entire operation.

[0057] Another scenario of Method 1 involves the power supply switch 2DL of substation B being in the open position, while the other switches are in the closed position. Its working principle is the same as above and will not be repeated here.

[0058] Method 2, as Figure 4 As shown, in substation A, the sectionalizing switch 3DL is in the open position, while the other switches are in the closed position.

[0059] Its charging conditions are as follows:

[0060] 1. The voltage U of bus I and II of substations A and B I U II All are greater than the pressure setpoint U set , that is, UI>U set And U II >U set ;

[0061] 2. In substation A, sectionalizing switch 3DL is in the open position, while other switches are in the closed position.

[0062] 3. No interlocking backup automatic transfer signal;

[0063] 4. No abnormal circuit breaker position signal;

[0064] If all four conditions are met simultaneously and a 10-second delay is elapsed, the inter-station backup automatic switching method 2 charging is completed.

[0065] Its action logic is as follows:

[0066] When a power supply failure occurs at substation A, power supply switch 1DL of substation A trips, causing a loss of voltage on bus I of substation A. The automatic transfer switch (ATS) is activated, sending a command to trip power supply switch 1DL of substation A after a time delay of T1. If power supply switch 1DL of substation A does not trip, the ATS logic stops operating. If power supply switch 1DL of substation A trips, a command to close power supply sectionalizing switch 3DL of substation A is sent after a time delay of T2. At this point, the ATS completes its entire operation logic.

[0067] When a power supply failure occurs at substation B, power supply switch 1DL of substation B trips. At this time, the entire substation B experiences a power outage, and bus II of substation A also experiences a power outage. The automatic transfer switch (ATS) is activated, and after a time delay of T1, a command to trip power supply switch 1DL of substation B is sent. If power supply switch 1DL of substation B does not trip, the ATS logic stops operating. If power supply switch 1DL of substation B trips, after a time delay of T2, a command to close sectionalizing switch 3DL of substation A is sent. At this point, the ATS completes its entire operation logic.

[0068] Another scenario in Method 2 involves the sectionalizing switch 3DL in the open position and all other switches in the closed position at substation B. Its working principle is the same as above and will not be repeated here.

[0069] Method 3 Figure 5 As shown, in substation A, power supply switch 1DL is in the open position, while the other switches are in the closed position.

[0070] Its charging conditions are as follows:

[0071] 1. The voltage U of bus I and II of substations A and B I U II All are greater than the pressure setpoint U set , that is U I >U set And U II >U set ;

[0072] 2. When the "Check standby power supply voltage" control word is activated, the voltage U of power supply line 1 in substation A is... L1 Greater than the pressure set value U set , that is U L1 >U set If the "Check backup power supply voltage" function is not enabled, this point can be disregarded.

[0073] 3. In substation A, power supply switch 1DL is in the open position, and other switches are in the closed position; when the single bus mode input is "1", the position of switch 3DL is not determined.

[0074] 4. No interlocking backup automatic transfer signal;

[0075] 5. No abnormal circuit breaker position signal;

[0076] If all five conditions are met and there is a 10-second delay, the inter-station backup automatic switching method three charging is completed.

[0077] Its action logic is as follows:

[0078] When power supply 2 at substation A fails, power supply switch 2DL of substation A trips, causing a complete power outage at substation A. The automatic transfer switch (ATS) is activated, sending a command to trip power supply switch 2DL of substation A after a time delay of T1. If power supply switch 2DL of substation A does not trip, the ATS logic stops operating. If power supply switch 2DL of substation A trips, a command to close power supply switch 1DL of substation A is sent after a time delay of T2. At this point, the ATS completes its entire operation.

[0079] When a power supply failure occurs at substation B, power supply switch 1DL of substation B trips, causing a complete power outage at both substations A and B. The automatic transfer switch (ATS) is activated, sending a command to trip power supply switch 1DL of substation B after a time delay of T1. If power supply switch 1DL of substation B does not trip, the ATS logic stops operating. If power supply switch 1DL of substation B trips, a command to close power supply switch 1DL of substation A is sent after a time delay of T2. At this point, the ATS completes its entire operation.

[0080] Another scenario in Method 3 involves the power supply switch 1DL of substation B being in the open position, while the other switches are in the closed position. Its working principle is the same as above and will not be repeated here.

[0081] In summary, this invention proposes a regional inter-station automatic transfer switch (ATS) based on the dispatch master station. An ATS control module is integrated into the D5000 intelligent dispatch control system. This module incorporates switch signals such as the location of the substation's incoming power supply and analog signals such as bus voltage and incoming current / voltage collected by the D5000 intelligent dispatch control system into the ATS control algorithm, ultimately realizing the ATS function. This invention enables flexible adjustment of the ATS control mode. It allows for arbitrary adjustment of the backup power supply branches between different substations based on the grid operation mode, whereas traditional ATS designs cannot change the backup power supply branches once finalized. Furthermore, this invention saves substation space and reduces the laying of secondary cables and optical fibers, thus lowering substation investment costs.

[0082] The above are preferred embodiments of the present invention. Any changes made to the technical solution of the present invention that do not exceed the scope of the technical solution of the present invention shall fall within the protection scope of the present invention.

Claims

1. A dispatching master station end-based regional inter-station backup power supply device, characterized in that, The application relates to a regional inter-station backup power supply control method and device. The regional inter-station backup power supply control method is realized based on the backup power supply control module in claim 1; when the two substations A and B are in the operation mode one, that is, the tie switch of the substation A is in the split position, the line switch and the bus switch of the substation A are in the closed position, and the tie switch, the line switch and the bus switch of the substation B are in the closed position, the action logic of the regional inter-station backup power supply is as follows:

2. A dispatching master station-based regional inter-station backup control method, characterized in that, When the line power supply of the substation A is faulty, the backup power supply is started, a command of tripping the line switch of the substation A is sent after a T1 time delay; if the line switch of the substation A is not tripped, the backup power supply logic stops the action; if the line switch of the substation A is tripped, a command of closing the tie switch of the substation A is sent after a T2 time delay; at this time, the backup power supply completes the whole action logic; When the line power supply of the substation B is faulty, the backup power supply is started, a command of tripping the line switch of the substation B is sent after a T1 time delay; if the line switch of the substation B is not tripped, the backup power supply logic stops the action; if the line switch of the substation B is tripped, a command of closing the tie switch of the substation A is sent after a T2 time delay; at this time, the backup power supply completes the whole action logic. When the two substations A and B are in the operation mode one, and the following five conditions are satisfied and a TO time delay is realized, the regional inter-station backup power supply mode one is charged: (3) the tie switch of the substation A is in the split position, the line switch and the bus switch of the substation A and the tie switch, the line switch and the bus switch of the substation B are in the closed position; if the switch input of the "single busbar mode" is 1, the position of the bus switch is not judged; 3. The regional inter-station backup control method based on a dispatch master station end according to claim 2, characterized in that, (4) there is no backup power supply blocking signal; (1) The bus voltage of A, B substations I section, II section is greater than the pressure value U set ; (2) When the "check standby power supply has voltage" control word is put in, the voltage of the A substation tie line is greater than the voltage set value U set , or the B substation II section bus has voltage and the B substation tie switch is in the closed position; if the "check standby power supply has voltage" control word is not put in, this condition is not considered; (5) there is no breaker position abnormal signal. The regional inter-station backup power supply control method is realized based on the backup power supply control module in claim 1; when the two substations A and B are in the operation mode two, that is, the bus switch of the substation A is in the split position, the line switch and the tie switch of the substation A are in the closed position, and the tie switch, the line switch and the bus switch of the substation B are in the closed position, the action logic of the regional inter-station backup power supply is as follows: When the line power supply of the substation A is faulty, the backup power supply is started, a command of tripping the line switch of the substation A is sent after a T1 time delay; if the line switch of the substation A is not tripped, the backup power supply logic stops the action; 4. A dispatching master station-based regional inter-station backup control method, characterized in that, if the line switch of the substation A is tripped, a command of closing the tie switch of the substation A is sent after a T2 time delay; at this time, the backup power supply completes the whole action logic; When the line power supply of the substation B is faulty, the backup power supply is started, a command of tripping the line switch of the substation B is sent after a T1 time delay; if the line switch of the substation B is not tripped, the backup power supply logic stops the action; if the line switch of the substation B is tripped, a command of closing the tie switch of the substation A is sent after a T2 time delay; at this time, the backup power supply completes the whole action logic. If the incoming line switch of A substation is tripped, the command of closing the bus-tie switch of A substation is sent after a time delay of T2; At this time, the whole action logic of the backup power supply device is completed. If the incoming line switch of B substation is not tripped, the action logic of the backup power supply device is stopped; if the incoming line switch of B substation is tripped, the command of closing the bus-tie switch of A substation is sent after a time delay of T2; At this time, the whole action logic of the backup power supply device is completed. When the two substations A and B are in the operation mode two, and the following four conditions are met simultaneously and after a time delay of T0, the backup power supply device between the two substations in the mode two is charged:

5. The regional inter-station backup automatic switching control method based on a dispatch master station end according to claim 4, characterized in that, (2) The bus-tie switch of A substation is in the open position, and the incoming line switch, the bus-tie switch and the incoming line switch of B substation are in the closed position; (1) The bus voltage of A, B substations I section, II section is greater than the pressure value U set ; (3) There is no blocking signal of the backup power supply device; (4) There is no abnormal signal of the breaker position. The backup power supply device between the two substations in the mode three is charged when the two substations A and B are in the operation mode three, i.e., the incoming line switch of A substation is in the open position, the bus-tie switch and the incoming line switch of B substation are in the closed position, and the following action logic of the backup power supply device between the two substations is as follows:

6. A dispatching master station-based regional inter-station backup control method, characterized in that, If the incoming line switch of B substation is not tripped, the action logic of the backup power supply device is stopped; if the incoming line switch of B substation is tripped, the command of closing the bus-tie switch of A substation is sent after a time delay of T2; At this time, the whole action logic of the backup power supply device is completed. If the incoming line switch of B substation is not tripped, the action logic of the backup power supply device is stopped; if the incoming line switch of B substation is tripped, the command of closing the bus-tie switch of A substation is sent after a time delay of T2; At this time, the whole action logic of the backup power supply device is completed. When the two substations A and B are in the operation mode three, and the following five conditions are met simultaneously and after a time delay of T0, the backup power supply device between the two substations in the mode three is charged: (3) The incoming line switch of A substation is in the open position, and the bus-tie switch, the incoming line switch and the bus-tie switch of B substation are in the closed position; if the switch input of the "single bus mode" is 1, the position of the bus-tie switch is not judged; (4) There is no blocking signal of the backup power supply device; 7. The regional inter-station backup automatic switching control method based on a dispatch master station end according to claim 6, characterized in that, (5) There is no abnormal signal of the breaker position. (1) The bus voltage of A, B substations I section, II section is greater than the pressure value U set ; (2) When the "check standby power supply has voltage" control word is put in, the voltage of the power supply incoming line of A substation is greater than the voltage of the voltage setting value U set ; if the "check standby power supply has voltage" control word is not put in, this condition is not considered; ​ ​ ​

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