A method for on-line automatic transfer of load in a power supply substation in case of total failure

Abstract

The present application relates to the field of power distribution automation, and particularly relates to a kind of full stop on-line automatic load transfer method of feed supply substation.A kind of full stop on-line automatic load transfer method of feed supply substation, comprising the following steps: (1). feed supply substation full stop fault characteristic quantity detection;(2). determine whether to occur feed supply substation full stop fault, if no feed supply substation full stop fault occurs, then return to step (7), if there is feed supply substation full stop fault, then continue step (3);(3). obtain main grid control system data;(4). obtain distribution network control system data;(5). update feed supply substation full stop fault processing scheme execution table;(6). execute feed supply substation full stop fault recovery power supply program;(7). determine whether to return to feed supply substation full stop fault.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of power distribution automation, and in particular to a method for automatically transferring loads online when a feeder substation is completely out of service. BACKGROUND

[0002] Substations play a crucial role in the process of power transmission, and a complete failure of a hub-effect substation will have a great impact on the operation of the distribution network. Feeder substations located in the distribution network serve as a link between the main power source and power customers. Once a failure occurs and the substation is completely out of service, the distribution lines, distribution transformers, and power customers connected to the substation will be directly affected.

[0003] In the traditional method, when a feeder substation is completely out of service, the distribution network dispatcher manually searches for a power supply channel connected to the low-voltage bus of the faulty substation. The capacity of the current lines and backup transformers is calculated to determine whether the loads of the low-voltage bus of the faulty substation can be supplied through the distribution network. This method has the following disadvantages: the time for handling the failure is usually long, which increases the power customers' perception of the outage over time; the need for dual power supply for important customers is not considered, which may not meet the reliability level of power supply; and the load transfer path of the low-voltage bus of the faulty substation cannot be considered comprehensively, which may result in uneven load distribution.

[0004] With the construction and operation of the new generation of centralized distributed dispatching management system and the deepening application of big data technology, it is necessary to provide a new scheme to meet the actual use requirements. SUMMARY

[0005] To overcome the deficiencies of the prior art, the present application provides a method for automatically transferring loads online when a feeder substation is completely out of service. When a feeder substation is completely out of service, the distribution network lines and station power in the substation can be transferred in a timely manner, improving the reliability of power supply and having good use and promotion value.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0007] A method for automatically transferring loads online when a feeder substation is completely out of service, comprising the following steps:

[0008] (1) detecting the characteristic quantity of the feeder substation complete failure;

[0009] (2). Determine whether the feeder substation total failure occurs, if no feeder substation total failure occurs, return to step (7), if there is a feeder substation total failure, continue step (3);

[0010] (3). Obtain the main grid control system data;

[0011] (4). Obtain the distribution network control system data;

[0012] (5). Update the feeder substation total failure handling scheme execution table;

[0013] (6). Execute the feeder substation total failure recovery power supply program;

[0014] (7). Determine whether the feeder substation total failure is restored.

[0015] Further, the feeder substation total failure characteristic quantity detection, step (1) specifically includes: according to the sampling step length of 1 second, the main grid control system is patrolled, and the total station accident total action signal and the power supply line side bus voltage telemetry of the substation are continuously detected.

[0016] Further, the feeder substation total failure characteristic quantity detection in step (1) includes the following:

[0017] If the main grid control system appears "total station accident total action" signal at T1, record the signal as Fault01;

[0018] If the main grid control system appears "all power system failure action" signal at T2, record the signal as Fault02;

[0019] If the main grid control system appears "10kV / 35kV station power supply line abnormal action" signal at T3, record the signal as Fault03;

[0020] If the main grid control system appears "capacitor switch under-voltage protection action" signal at T4, record the signal as Fault04;

[0021] If the main grid control system appears "main transformer 10kV / 35kV side backup protection alarm action" signal at T5, record the signal as Fault05;

[0022] When the above situation Fault occurs in the main grid control system within time T, the main grid control system records the occurrence of substation total failure, and the scanning of substation total failure characteristic quantity is completed.

[0023] T = max (T1, T2, T3, T4, T5) - min (T1, T2, T3, T4, T5)

[0024] T∈[50ms,1000ms]

[0025] Fault=Fault01&Fault02&Fault03&Fault04&Fault05.

[0026] Further, the judging whether the full stop fault of the feeding substation occurs in step (2) specifically comprises:

[0027] If the "total action of full station accident" signal and the "action of used electric system fault" signal occur, and the signal holding time is greater than or equal to 1000 ms, and the phase voltage of the bus on the power line side of the substation is less than or equal to 0.3U N , the relationship between the remote measurement of the phase voltage of the bus on the power line side of the substation and the rated phase voltage U a is U N ≤0.3U b , and the relationship between the remote measurement of the phase voltage of the bus on the power line side of the substation and the rated phase voltage U N is U c ≤0.3U N .

[0028] If the "total action of full station accident" signal and the "action of 10kV / 35kV station used electric power line source abnormality" signal occur, and the signal holding time is greater than or equal to 1000 ms, and the phase voltage of the bus on the power line side of the substation is less than or equal to 0.3U N , the relationship between the remote measurement of the phase voltage of the bus on the power line side of the substation and the rated phase voltage U a is U N ≤0.3U b , and the relationship between the remote measurement of the phase voltage of the bus on the power line side of the substation and the rated phase voltage U N is U c ≤0.3U N .

[0029] If the "total action of full station accident" signal and the "action of main transformer 10kV / 35kV side backup protection warning" signal occur, and the signal holding time is greater than or equal to 1000 ms, and the phase voltage of the bus on the power line side of the substation is less than or equal to 0.3U N , the relationship between the remote measurement of the phase voltage of the bus on the power line side of the substation and the rated phase voltage U a is U N ≤0.3U b , and the relationship between the remote measurement of the phase voltage of the bus on the power line side of the substation and the rated phase voltage U N is U c ≤0.3U N .

[0030] When one or more of the above situations occur in the main grid control system, the main grid control system records the occurrence of the full stop fault of the feeding substation, and the judging of the full stop fault of the feeding substation is completed.

[0031] Further, the acquiring of the data of the main grid control system in step (3) specifically comprises:

[0032] Find the number of main transformer TN of the feeder substation in the main grid regulation system, and the low-voltage side switches 101, 102, 301, 302 of the main transformer of the feeder substation.

[0033] Find the low-voltage bus BN in the main grid regulation system, and the electrical connection switches 110, 120, 100, 300 between the low-voltage buses of the feeder substation.

[0034] Find the low-voltage low-voltage backup power supply configuration of the feeder substation in the main grid regulation system, and the backup power supply BZT01, BZT02, BZT03, BZT04 configured by 110, 120, 100, 300 switches.

[0035] Further, the step (4) obtains the distribution network regulation system data, specifically including:

[0036] Find the topology structure of each outgoing line of the low-voltage side of the feeder substation in the distribution network regulation system, analyze each outgoing line according to the vertical priority traversal algorithm, and confirm the internal substation connection set Nset and the external substation connection Wset of each outgoing line.

[0037] Further, the step (5) updates the feeder substation full stop processing scheme execution table, specifically including:

[0038] For each outgoing line Line of the low-voltage side of the feeder substation, if there is a new external connection, update the feeder substation full stop processing scheme execution table to the database, if there is no new external substation connection, do not modify the feeder substation full stop processing scheme execution table. When there are important users in the power failure area, the priority order of load recovery is also required.

[0039] Further, the step (6) executes the feeder substation full stop fault recovery power supply program, specifically including:

[0040] According to the execution order of the feeder substation full stop processing scheme execution table, operate the switch devices in the main grid regulation system and the distribution network regulation system, and complete the recovery of the voltage bus and outgoing line of the feeder substation.

[0041] Further, the step (7) determines whether the feeder substation full stop is restored, specifically including:

[0042] According to the sampling step length of 2 seconds, patrol the remote signal in the main grid regulation system, and when the "full station accident total action" signal and the "10kV / 35kV station power supply abnormal action" signal are restored, it is determined that the feeder substation full stop fault is restored.

[0043] The beneficial effects of this invention are:

[0044] 1) It can adapt to multiple operating conditions of the main power grid and distribution network, monitor and analyze the complete power outage fault of the feeder substation in real time, and restore power supply to the feeder substation in the event of a complete power outage fault.

[0045] 2) This method can effectively improve the power supply restoration efficiency after a complete substation outage, and enhance the control and management capabilities of dispatching and operation personnel for efficient operation of the distribution network.

[0046] 3) The handling of complete power outage faults in feeder substations has been transformed from traditional manual calculation to offline calculation and online matching, which effectively improves the accuracy and effectiveness of dispatching operations and enhances the quality and efficiency of power supply service command.

[0047] 4) Effectively reduces the processing time for total power outages at feeder substations, shortens the time that electricity customers perceive as a power outage, and reduces the risk of customer complaints due to power outages.

[0048] 5) The substation full shutdown online automatic load transfer method provided by the present invention does not require additional configuration of new equipment, and has great economic benefits and promotional value.

[0049] 6) The substation full shutdown online automatic load transfer method provided by the present invention is applicable to the feeder substations used, including grid-side feeder substations and user-side substations with interconnection. Attached Figure Description

[0050] Appendix Figure 1 Flowchart of an online automatic load transfer method for a fully shut-down feeder substation

[0051] Appendix Figure 2 Feedback diagram of fault signal characteristics of main grid control system

[0052] Appendix Figure 3 Feedback diagram of topological characteristics of distribution network control system

[0053] Appendix Figure 4 This is a schematic diagram of the substation outgoing line connection in the embodiment.

[0054] Appendix Figure 5 The diagram shown is a primary wiring diagram for a two-line, two-transformer substation operating mode in the embodiment.

[0055] Appendix Figure 6 The diagram shown is for the primary wiring configuration of a substation operating with one line and two transformers, as illustrated in the example.

[0056] Appendix Figure 7 The diagram shown is for the primary wiring of a substation operating in a one-line-one-transformer mode as illustrated in the example. Detailed Implementation

[0057] Refer to the drawings Figures 1-7 A method for automatically transferring load in an online manner in the event of a full outage of a feed-supply substation, comprising the following steps:

[0058] 1. Detecting a characteristic quantity of a full outage fault of a feed-supply substation;

[0059] 2. Determining whether a full outage fault of a feed-supply substation occurs, if no full outage fault of a feed-supply substation occurs, returning to step 7, if a full outage fault of a feed-supply substation exists, continuing to step 3;

[0060] 3. Obtaining data of a main grid control system;

[0061] 4. Obtaining data of a distribution network control system;

[0062] 5. Updating an execution table of a full outage fault handling scheme of a feed-supply substation;

[0063] 6. Executing a power supply recovery program for a full outage fault of a feed-supply substation;

[0064] 7. Determining whether a full outage fault of a feed-supply substation is recovered.

[0065] The detection of the characteristic quantity of the full outage fault of the feed-supply substation specifically comprises: continuously detecting a total action signal of a full station accident and a voltage telemetry of a busbar at a power line side of the substation according to a sampling step of 1 second to patrol the main grid control system.

[0066] The detection method of the characteristic quantity of the full outage fault of the feed-supply substation comprises the following:

[0067] If a "total action of a full station accident" signal of the main grid control system appears at T1, the signal is recorded as Fault01;

[0068] If a "system fault action" signal of the main grid control system appears at T2, the signal is recorded as Fault02;

[0069] If a "10kV / 35kV station power supply abnormal action" signal of the main grid control system appears at T3, the signal is recorded as Fault03;

[0070] If a "capacitor switch under-voltage protection action" signal of the main grid control system appears at T4, the signal is recorded as Fault04;

[0071] If a "main transformer 10kV / 35kV side backup protection alarm action" signal of the main grid control system appears at T5, the signal is recorded as Fault05;

[0072] When the above-mentioned Fault signals appear in the main grid control system within a time T, the main grid control system records the occurrence of a full outage fault of the substation, and the scanning of the characteristic quantity of the full outage fault of the substation is completed.

[0073] T = max(T1, T2, T3, T4, T5) - min(T1, T2, T3, T4, T5)

[0074] T ∈ [50ms, 1000ms]

[0075] Fault = Fault01 & Fault02 & Fault03 & Fault04 & Fault05

[0076] The judging the full stop fault of the feeding substation specifically comprises:

[0077] If the "total action of the full station accident" signal and the "action of the fault of the used electric system" signal appear, and the signal holding time is greater than or equal to 1000ms, and the relationship between the remote measurement of the phase voltage of the bus on the incoming line side of the power supply of the substation and the rated phase voltage U N is U a ≤ 0.3U N , U b ≤ 0.3U N , U c ≤ 0.3U N .

[0078] If the "total action of the full station accident" signal and the "abnormal action of the 10kV / 35kV station-used electric incoming line power supply" signal appear, and the signal holding time is greater than or equal to 1000ms, and the relationship between the remote measurement of the phase voltage of the bus on the incoming line side of the power supply of the substation and the rated phase voltage U N is U a ≤ 0.3U N , U b ≤ 0.3U N , U c ≤ 0.3U N .

[0079] If the "total action of the full station accident" signal and the "alarm action of the backup protection on the 10kV / 35kV side of the main transformer" signal appear, and the signal holding time is greater than or equal to 1000ms, and the relationship between the remote measurement of the phase voltage of the bus on the incoming line side of the power supply of the substation and the rated phase voltage U N is U a ≤ 0.3U N , U b ≤ 0.3U N , U c ≤ 0.3U N .

[0080] When one or more than one of the above situations appears in the main grid regulation and control system, the main grid regulation and control system records the occurrence of the full stop fault of the feeding substation, and the judgment of the full stop fault of the feeding substation is completed.

[0081] The acquisition main network regulation system data specifically includes:

[0082] The main network regulation system is searched to find the number of main transformers TN of the feeding substation, and the low-voltage side switches 101, 102, 301, and 302 of the main transformer of the feeding substation.

[0083] The main network regulation system is searched to find the low-voltage bus BN, and the electrical connection switches 110, 120, 100, and 300 between the low-voltage buses of the feeding substation.

[0084] The main network regulation system is searched to find the low-voltage low-voltage backup power supply configuration of the feeding substation, and the backup power supply BZT01, BZT02, BZT03, and BZT04 configured by the switches 110, 120, 100, and 300.

[0085] The acquisition main network regulation system data specifically includes:

[0086] The topology structure of each outgoing line on the low-voltage side of the feeding substation is searched in the distribution network regulation system, each outgoing line is analyzed according to the vertical priority traversal algorithm, and the internal substation connection set Nset and the external substation connection Wset of each outgoing line are confirmed.

[0087] The update feeding substation full stop processing scheme execution table specifically includes:

[0088] For each outgoing line Line on the low-voltage side of the feeding substation, if there is a new external connection, the feeding substation full stop processing scheme execution table is updated to the database, and if there is no new external substation connection, the feeding substation full stop processing scheme execution table is not modified. When there are important users in the power failure fault area, the priority order of load recovery is also required.

[0089] The execution feeding substation full stop fault recovery power supply program specifically includes:

[0090] The switches in the main network regulation system and the distribution network regulation system are operated according to the execution order of the feeding substation full stop processing scheme execution table, and the recovery power supply of the voltage bus and the outgoing line of the feeding substation is completed.

[0091] The determination of whether the feeding substation full stop is restored specifically includes:

[0092] According to the sampling step length of 2 seconds, the remote signal in the main network regulation system is patrolled, and when the “total action of the whole station accident” signal and the “10kV / 35kV station power supply abnormal action” signal are restored, it is determined that the feeding substation full stop fault is restored.

[0093] Embodiment 1

[0094] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present application and not used to limit the present application.

[0095] As shown in Figure 1 , a method for automatically transferring load of a feed supply substation in full stop, Figure 5 In the method, permanent three-phase phase-to-phase short circuit faults occur in two 110kV incoming lines of the substation, the faults are removed by the protection action of the 110kV power supply side.

[0096] According to the step length of 1 second for patrolling the main grid control system, as shown in Figure 2 , the remote signaling signals of "total action of station accident", "fault action of used power system", "abnormal action of 10kV / 35kV station power incoming line power supply", "under-voltage protection action of capacitor switch" in the main grid control system will be detected, and the time span is 50 milliseconds. The remote measurement of three-phase voltage of 110kV I section bus is U a = 0.5kV, U b = 0.4kV, U c = 0.4kV; the remote measurement of three-phase voltage of 110kV II section bus is U a = 0.4kV, U b = 0.5kV, U c = 0.6kV; the remote measurement of three-phase voltage of 10kV I section bus is U a = 0.2kV, U b = 0.4kV, U c = 0.1kV; the remote measurement of three-phase voltage of 10kV II section bus is U a = 0.2kV, U b = 0.3kV, U c = 0.1kV.

[0097] The power supply recovery program of the feed supply substation in full stop fault runs in the main grid control system, the number of main transformers is 2, the high-voltage side switches of the running main transformers are 801, 802, 701, 702, 101, 102 switches. The backup power supply operation mode of the high-voltage side of the running transformer is the sectional backup power supply mode, and the backup power supply operation mode of the low-voltage side of the running transformer is the sectional backup power supply.

[0098] According to the step length of 1 second for patrolling the distribution network control system, as shown in Figure 3 , the topological structure analysis is performed on each outgoing line of the low-voltage bus of the substation, the 1F16 line has external substation connection to the 1Q04 line, and the 1F22 line has internal substation connection to the 1F23 line.

[0099] According to the substation primary wiring condition, the backup power automatic switching operation condition and the tie-in operation condition of each outgoing line of the low-voltage side bus of the substation in the main grid control system and the distribution network control system, the result is updated to the feeder substation full stop processing scheme execution table. For each outgoing line Line of the low-voltage side of the feeder substation, the tie-in condition is checked. If the outgoing line 1F16 line has a newly added external tie-in and the rated load limit of the 1Q04 line is less than the highest load limit of the 1Q04 line and the 1F16 line within one day, the feeder substation full stop processing scheme execution table is updated to the database. If there is no newly added external substation tie-in condition for the 1F22 line, the feeder substation full stop processing scheme execution table is not modified. When there are important users in the power failure area, the priority order of load recovery is also required.

[0100] The feeder substation full stop processing scheme execution table is executed in the feeder substation full stop fault recovery power supply program: the remote control command of the main transformer 101 switch and the remote control command of the main transformer 102 switch are sent to the main grid control system; the remote control command of the 1F16 switch is sent to the main grid control system; the remote control command of the 1F16 1Q04 switch is sent to the main grid control system, and the recovery power supply of the 1F16 line due to the feeder substation full stop fault is completed. The outgoing line of the low-voltage side bus of the substation with external substation tie-in is continued to be recovered according to the above method. If the sum of the loads of all lines with internal tie-in is less than the load of one line with internal tie-in, the line is selected to complete the operation of the upper bus string supply. If the sum of the loads of all lines with internal tie-in is greater than the load of one line with internal tie-in, the line with internal tie-in is selected to complete the operation of the upper bus string supply.

[0101] Embodiment 2

[0102] As shown in Figure 1 , a feeder substation full stop online automatic load transfer method, Figure 6 in which a permanent three-phase interphase short-circuit fault occurs in one 110kV incoming line of the substation, and the fault line is cut off by the protection action of the 110kV power supply side.

[0103] According to the step-by-step patrol of the main grid control system, as shown in Figure 2 , the remote signaling signals of "total station accident action", "used power system fault action", "10kV / 35kV station power supply abnormal action", and "capacitor switch under-voltage protection action" in the main grid control system will be detected, with a time span of 50 milliseconds. The remote measurement of the three-phase voltage of the 110kV I section bus is U a = 0.5kV, U b = 0.4kV, U c = 0.4kV; the remote measurement of the three-phase voltage of the 110kV II section bus is Ua = 0.4 kV, U b = 0.5 kV, U c = 0.6 kV; 10 kV I segment bus three-phase phase voltage remote measurement is U a = 0.2 kV, U b = 0.4 kV, U c = 0.1 kV; 10 kV II segment bus three-phase phase voltage remote measurement is U a = 0.2 kV, U b = 0.3 kV, U c = 0.1 kV.

[0104] The feeder substation full stop fault recovery power supply program runs the number of main transformer in the main network control system is 2, the high voltage side switch of the running main transformer is 801, 700, 701, 702, 101, 102 switch. The operation mode of the high voltage side spare power supply of the running transformer is sectional spare power supply mode, and the operation mode of the low voltage side spare power supply of the running transformer is sectional spare power supply.

[0105] According to the step of 1 second, the patrol network control system is shown in Figure Figure 3 . According to the topology structure analysis of each outgoing line on the low voltage bus of the substation, 1F16 line has external substation contact to 1Q04 line, and 1F22 line has internal substation contact to 1F23 line.

[0106] According to the primary wiring condition of the substation, the spare power supply operation condition and the contact operation condition of each outgoing line of the low voltage bus of the substation in the main network control system and the network control system, the result is updated to the feeder substation full stop processing scheme execution table. For each outgoing line Line of the low voltage side of the feeder substation, if the outgoing line 1F16 line has new external contact and the rated load limit of 1Q04 line is less than the highest load limit of 1Q04 line and 1F16 line in one day, the feeder substation full stop processing scheme execution table is updated to the database, if 1F22 line has no new external substation contact, the feeder substation full stop processing scheme execution table is not modified. When the power failure fault occurs in the area, the priority order of load recovery is also needed.

[0107] In the power restoration procedure for a complete power outage at the feeder substation, the following execution table is followed: Commands are sent to the main grid control system for remotely controlled main transformer 101 and 102 switches; commands are also sent to the main grid control system for remotely controlled 1F16 switches; and commands are sent to the main grid control system for remotely controlled 1F16 and 1F161Q04 switches, thus restoring power to line 1F16 due to the feeder substation outage. Power is then restored to the low-voltage busbar outgoing lines of the substation with external connections using the same method. If the sum of the loads of all lines with internal connections is less than the load of any single line with internal connections, that line is selected for the upper busbar series power supply operation. If the sum of the loads of all lines with internal connections is greater than the load of any single line with internal connections, the number of lines supplying power via the upper busbar is reduced using a decreasing dispatch outage method.

[0108] Example 3

[0109] like Figure 1 As shown, a method for automatic online load transfer in the event of a complete power outage at a feeder substation is presented. Figure 7 An internal short circuit fault occurred in the No. 1 main transformer of the substation. The fault was triggered by the differential protection of the 110kV main transformer, which disconnected the faulty transformer.

[0110] According to the main network control system, which is inspected in 1-second increments, such as Figure 2 As shown. The system will detect the following remote signaling signals in the main grid control system: "Total Station Fault Activation," "Power System Fault Activation," "10kV / 35kV Station Power Supply Incoming Line Abnormal Activation," and "Capacitor Switch Undervoltage Protection Activation," with a time span of 50 milliseconds. The remote measurement of the three-phase phase voltage of the 110kV Section I bus is U. a =65.8kV, U b =66.4kV, U c =66.1kV, the remote measurement of the three-phase phase voltage of the 10kV section I bus is U a =0.2kV, U b =0.4kV, U c =0.1kV; the remote measurement of the three-phase phase voltage of the 10kV II section busbar is U a =0.2kV, U b =0.3kV, U c =0.1kV.

[0111] The power restoration procedure for a complete power outage at the feeder substation involves traversing two operating main transformers in the main grid control system. The high-voltage side switches of the operating main transformers are switches 801, 802, 701, 702, 101, and 102. The automatic transfer switch operation mode on the high-voltage side of the operating transformers is a sectional automatic transfer switch mode, and the automatic transfer switch operation mode on the low-voltage side of the operating transformers is also a sectional automatic transfer switch mode.

[0112] According to the step of 1 second, the distribution network control system is patrolled, such as Figure 3 The topology structure analysis is carried out for each outgoing line on the low-voltage bus of the substation, the 1F16 line has external substation contact to the 1Q04 line, and the 1F22 line has internal substation contact to the 1F23 line.

[0113] According to the primary network control system and the distribution network control system, the primary connection of the substation, the backup power automatic switching operation, and the contact operation of each outgoing line of the low-voltage bus of the substation are obtained, and the result is updated to the feeder substation full stop processing scheme execution table. For each outgoing line Line of the low-voltage bus of the feeder substation, if the outgoing line 1F16 line has new external contact and the rated load limit of the 1Q04 line is less than the highest load limit of the 1Q04 line and the 1F16 line within one day, the feeder substation full stop processing scheme execution table is updated to the database, and if the 1F22 line has no new external substation contact, the feeder substation full stop processing scheme execution table is not modified. When the power failure occurs in the region, the priority order of load recovery is also required.

[0114] In the feeder substation full stop fault recovery power supply program, the feeder substation full stop processing scheme execution table is executed: the remote control of the main transformer 101 switch and the remote control of the main transformer 102 switch command are sent to the main network control system; the remote control of the 1F16 switch command is sent to the main network control system; the remote control of the 1F16 1Q04 switch command is sent to the main network control system, and the recovery power supply of the 1F16 line due to the feeder substation full stop fault is completed. The outgoing line of the low-voltage bus of the substation with external substation contact is continued to be completed according to the above method. If the sum of the loads of all lines with internal contact is less than the load of one line with internal contact, the line is selected to complete the operation of the upper bus string supply, and if the sum of the loads of all lines with internal contact is greater than the load of one line with internal contact, the dispatch power reduction is reduced in the way of the upper bus string supply line.

Claims

1. A method for automatically transferring load online in the case of a full outage of a feed-supply substation, characterized in that it comprises the following steps: (1) detecting a characteristic quantity of a full outage fault of the feed-supply substation; (2) determining whether a full outage fault of the feed-supply substation has occurred, if no full outage fault of the feed-supply substation has occurred, returning to step (7), if a full outage fault of the feed-supply substation exists, continuing to step (3); (3) acquiring data of a main grid control system; (4) acquiring data of a distribution network control system; (5) updating an execution table of a full outage fault handling scheme of the feed-supply substation; (6) executing a power supply recovery program for a full outage fault of the feed-supply substation; (7) determining whether the full outage fault of the feed-supply substation has returned. The detection of the characteristic quantity of the full outage fault of the feed-supply substation in step (1) specifically comprises: patrolling the main grid control system according to a sampling step of 1 second, continuously detecting a total action signal of a full station accident and a voltage telemetry quantity of a bus at a power supply incoming line side of the feed-supply substation. The detection of the characteristic quantity of the full outage fault of the feed-supply substation in step (1) comprises the following: If a "total action of a full station accident" signal of the main grid control system appears at T1, the signal is recorded as Fault01; If a "system fault action" signal of the main grid control system appears at T2, the signal is recorded as Fault02; If a "10kV / 35kV station power incoming line power abnormal action" signal of the main grid control system appears at T3, the signal is recorded as Fault03; If a "capacitor switch under-voltage protection action" signal of the main grid control system appears at T4, the signal is recorded as Fault04; If a "main transformer 10kV / 35kV side backup protection alarm action" signal of the main grid control system appears at T5, the signal is recorded as Fault05; When the above situation Fault appears in the main grid control system within a time T, the main grid control system records the occurrence of the full outage fault of the feed-supply substation, and the scanning of the characteristic quantity of the full outage fault of the feed-supply substation is completed. The determination of whether the full outage fault of the feed-supply substation has occurred in step (2) specifically comprises: ； ； ； When one of the above situations appears in the main grid control system, the main grid control system records the occurrence of the full outage fault of the feed-supply substation, and the determination of the full outage fault of the feed-supply substation is completed. If the "total action of all stations accident" signal and the "action of failure of used electric system" signal appear, and the signal holding time is greater than or equal to 1000 ms, and the relationship between the three-phase voltage remote measurement of the power supply line side bus a, b, c of the feeding substation and the rated phase voltage is: ; and ; If the "total action of all stations accident" signal and the "10kV / 35kV station power supply abnormal action" signal appear, and the signal holding time is greater than or equal to 1000ms, and the relationship between the remote measurement of the phase voltage of the power supply line side bus of the feeding substation and the rated phase voltage is: ;​ If the "total action of substation accident" signal and the "main transformer 10kV / 35kV side backup protection alarm action" signal appear, and the signal holding time is greater than or equal to 1000ms, and the relationship between the remote measurement of the phase voltage of the power supply line side bus of the substation and the rated phase voltage is: ; and ; and 2. The method according to claim 1, characterized in that: In step (3), the acquisition of the data of the main grid control system specifically comprises: finding TN transformers of the feed-supply substation and switches 101, 102, 301 and 302 at a low-voltage side of the main transformer of the feed-supply substation in the main grid control system; finding BN busbars and switches 110, 120, 100 and 300 between the low-voltage busbars of the feed-supply substation in the main grid control system; finding a configuration of a low-voltage backup automatic transfer switch of the feed-supply substation in the main grid control system, the backup automatic transfer switches of the switches 110, 120, 100 and 300 being BZT01, BZT02, BZT03 and BZT04. ​ 3. The method of claim 1, wherein, The step (4) of obtaining the data of the distribution network control system comprises: In the distribution network control system, the topology structure of each outgoing line at the low-voltage side of the feeder substation is found, each outgoing line is analyzed according to a vertical priority traversal algorithm, and the internal substation contact set Nset and the external substation contact Wset of each outgoing line are confirmed.

4. The method of claim 1, wherein, The step (5) of updating the execution table of the feeder substation outage fault processing scheme comprises: For each outgoing line Line at the low-voltage side of the feeder substation, the contact situation thereof is checked, if there is a new external contact for the outgoing line Line, the execution table of the feeder substation outage processing scheme is updated in the database, if there is no new external substation contact situation, the execution table of the feeder substation outage processing scheme is not modified; when there is an important user in the power failure occurrence area, the priority order of the load recovery is also needed.

5. The method of claim 1, wherein, The step (6) of executing the feeder substation outage fault recovery power supply program comprises: According to the execution order of the execution table of the feeder substation outage processing scheme, the switch devices in the main network control system and the distribution network control system are operated, and the recovery power supply of the voltage bus and the outgoing line of the feeder substation is completed.

6. The method of claim 1, wherein, The step (7) of determining whether the feeder substation outage is restored comprises: According to a sampling step of 2 seconds, the remote signaling in the main network control system is patrolled, when the "total action of the whole station accident" signal and the "10kV / 35kV station power supply abnormal action" signal are restored, it is determined that the feeder substation outage fault is restored.

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