CN112183834A - Online generation and execution method and equipment for power grid accident handling plan - Google Patents
Online generation and execution method and equipment for power grid accident handling plan Download PDFInfo
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Abstract
The invention relates to an online generation and execution method of a power grid accident disposal plan, which comprises the following steps: determining a lost electronic system according to the fault information; searching a complex electrical path; carrying out safe retrieval on all searched complex circuit paths; checking the complex circuit paths which pass the safe retrieval, and if at least one complex circuit path which passes the checking exists, selecting an optimal path according to a checking result; if the complex circuit path passing the verification does not exist, cutting off part of the load according to a general strategy, then searching the complex circuit path again according to the steps, carrying out safe retrieval and verification, and selecting an optimal path; generating a plan according to the optimal path; and automatically executing the plan.
Description
Technical Field
The invention relates to a power grid accident handling plan online generation and execution method and equipment, and belongs to the technical field of power grid dispatching.
Background
The regional power grid is generally designed in a closed loop mode, operates in an open loop mode, is connected through a hot standby switch, and generally presents a radiation type structure. The power grid accident plan editor forecasts accident scenes according to the normal operation mode of the current power grid and conforms to the principle of 'one mode and one plan', and the power grid accident plan editor carries out station-by-station repair and edition. For example, 185 transformer substations of the Longyan power grid are required, the repair and compilation work consumes more than 300 working hours each year, the plan issue is usually not earlier than 5 months each year, the time and labor are wasted, the production practice and timeliness requirements are not met, and the main defects are summarized as follows: 1. the repair and compilation workload is large: the compilation, the check and the approval usually need more than two months. 2. Large space and breadth, and non-ideal propaganda and penetration effect: the selection of the complex circuit path of the monthly accident-reversal drilling regulator is greatly different from the pre-programmed plan under the line. 3. Timeliness and practicability do not meet the requirements: because the operation modes such as temporary wiring transaction, risk maintenance and the like can not be comprehensively considered by the pre-programmed accident plan, at least 35 parts of the adaptive temporary plan are repaired and programmed per year on average.
The invention patent publication No. CN111049131A entitled "method and system for generating a plan for online fault handling of regional power grid" discloses a technical scheme for generating a plan online according to fault information, but only discloses a principle of selecting an optimal path, and needs to manually execute the plan.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a method and a device for online generation and execution of a power grid accident handling plan, which automatically generate and execute the plan according to a fault condition and select a re-routing path by integrating safety and economy.
The technical scheme of the invention is as follows:
the first technical scheme is as follows:
determining a power-off electronic system according to fault information, wherein the power-off electronic system comprises a source power-off station and a forced power-off station;
searching a complex circuit path, wherein the complex circuit path is communicated with a power transmission power supply and a power loss electronic system;
carrying out safe retrieval on all searched complex circuit paths, and abandoning complex circuit paths which do not pass the safe retrieval;
checking the complex circuit paths which pass the safe retrieval, and if at least one complex circuit path which passes the checking exists, selecting an optimal path according to a checking result; if the complex circuit path passing the verification does not exist, cutting off part of the load according to a general strategy, then searching the complex circuit path again according to the steps, carrying out safe retrieval and verification, and selecting an optimal path;
generating a plan according to the optimal path, wherein the plan comprises a list of devices to be automatically remotely controlled and operated with operation sequences;
and automatically executing a plan, and automatically executing the switch pulling-closing operation according to the operation sequence according to the list of the equipment to be automatically remotely controlled with the operation sequence.
Further, the fault information comprises accident transient process protection alarm, wave recording, switch deflection information, equipment protection signals and telemetering change data; the specific steps for determining the electronic system according to the fault information are as follows:
when a protection action signal and switch deflection are detected, starting a judgment program; after 20 seconds of delay, if the voltage amplitude of the bus is greater than 90% or the bus voltage is less than or equal to 0.2kV, judging that the source is a source voltage loss station;
and scanning all associated stations of the source voltage loss station, and if the associated stations have current and voltage 10S before the fault occurs and buses of the associated stations have no voltage after the fault occurs, determining that the station is forced to be voltage loss.
Further, the specific steps of searching the complex path are as follows:
determining a power transmission power supply associated with the power loss electronic system; and according to a breadth-first search algorithm or a depth-first search algorithm, with a source voltage loss station as a starting point and a trend block diagram connecting line as a path, gradually extending and searching to a power transmission power supply to obtain a plurality of repeated paths.
Further, the specific steps of securely retrieving all the complex paths are as follows:
checking whether a gate of a grounding knife in the region is disconnected; setting switches at each side of an ungrounded main transformer, a small hydropower line switch and a low-cycle action feeder switch to be in a hot standby state; disconnecting the line switch of the station at the side of the complex electric path; if the complex circuit path is powered from a low voltage level, the soft clamp mode needs to be changed.
Further, the verifying the content includes: supply capacity, total switch operation number, network loss and load shedding; the specific formula for selecting the optimal path according to the verification result is as follows:
Ochose＝min(O1,O2,…,Oi,…,OH),i＝1,2,…,H
Oi＝r1·Llengthi+r2·Pflowi+r3·ΔUi+r4·Cti
in the formula: o ischoseNumbering the selected paths, and H is the total number of generated paths; o isiFor a path selection factor, r1～r4Respectively the length L of the path ilengthiOverall tidal current PflowiVoltage deviation DeltaUiAnd total number of switch operations CtiThe weight of (a) is calculated,
the second technical scheme is as follows:
an online generation and execution device for a grid accident handling plan, comprising a memory and a processor, the memory storing instructions adapted to be loaded by the processor and to perform the steps of:
determining a power-off electronic system according to fault information, wherein the power-off electronic system comprises a source power-off station and a forced power-off station;
searching a complex circuit path, wherein the complex circuit path is communicated with a power transmission power supply and a power loss electronic system;
carrying out safe retrieval on all searched complex circuit paths, and abandoning complex circuit paths which do not pass the safe retrieval;
checking the complex circuit paths which pass the safe retrieval, and if at least one complex circuit path which passes the checking exists, selecting an optimal path according to a checking result; if the complex circuit path passing the verification does not exist, cutting off part of the load according to a general strategy, then searching the complex circuit path again according to the steps, carrying out safe retrieval and verification, and selecting an optimal path;
generating a plan according to the optimal path, wherein the plan comprises a list of devices to be automatically remotely controlled and operated with operation sequences;
and automatically executing a plan, and automatically executing the switch pulling-closing operation according to the operation sequence according to the list of the equipment to be automatically remotely controlled with the operation sequence.
Further, the fault information comprises accident transient process protection alarm, wave recording, switch deflection information, equipment protection signals and telemetering change data; the specific steps for determining the electronic system according to the fault information are as follows:
when a protection action signal and switch deflection are detected, starting a judgment program; after 20 seconds of delay, if the voltage amplitude of the bus is greater than 90% or the bus voltage is less than or equal to 0.2kV, judging that the source is a source voltage loss station;
and scanning all associated stations of the source voltage loss station, and if the associated stations have current and voltage 10S before the fault occurs and buses of the associated stations have no voltage after the fault occurs, determining that the station is forced to be voltage loss.
Further, the specific steps of searching the complex path are as follows:
determining a power transmission power supply associated with the power loss electronic system; and according to a breadth-first search algorithm or a depth-first search algorithm, with a source voltage loss station as a starting point and a trend block diagram connecting line as a path, gradually extending and searching to a power transmission power supply to obtain a plurality of repeated paths.
Further, the specific steps of securely retrieving all the complex paths are as follows:
checking whether a gate of a grounding knife in the region is disconnected; setting switches at each side of an ungrounded main transformer, a small hydropower line switch and a low-cycle action feeder switch to be in a hot standby state; disconnecting the line switch of the station at the side of the complex electric path; if the complex circuit path is powered from a low voltage level, the soft clamp mode needs to be changed.
Further, the verifying the content includes: the method comprises the following steps of (1) transfer capacity, network loss, load shedding, integral tide, voltage deviation and total number of switch operations; the specific formula for selecting the optimal path according to the verification result is as follows:
Ochose＝min(O1,O2,…,Oi,…,OH),i＝1,2,…,H
Oi＝r1·Llengthi+r2·Pflowi+r3·ΔUi+r4·Cti
in the formula: o ischoseNumbering the selected paths, and H is the total number of generated paths; o isiFor a path selection factor, r1～r4Respectively the length L of the path ilengthiOverall tidal current PflowiVoltage deviation DeltaUiAnd total number of switch operations CtiThe weight of (a) is calculated,
the invention has the following beneficial effects:
1. the invention automatically generates and executes the plan on line, thereby reducing the workload of the power grid staff; corresponding plans can be comprehensively and flexibly generated and executed according to the fault conditions, and the power recovery efficiency is improved;
2. the invention can autonomously select the weight of each parameter and select the optimal path according to different factors under different conditions; and a simple and reliable formula for selecting the optimal path is provided, the calculated amount is reduced, and the power recovery efficiency is improved.
Drawings
FIG. 1 is a flow chart of the present invention.
Detailed Description
The invention is described in detail below with reference to the figures and the specific embodiments.
Example one
Referring to fig. 1, an online generation and execution method of a power grid accident handling plan includes the following steps:
determining a power-off electronic system according to fault information, wherein the power-off electronic system comprises a source power-off station and a forced power-off station;
searching a complex circuit path, wherein the complex circuit path is communicated with a power transmission power supply and a power loss electronic system;
carrying out safe retrieval on all the complex circuit paths, and abandoning the complex circuit paths which do not pass the safe retrieval;
checking the complex circuit paths which pass the safe retrieval, and if at least one complex circuit path which passes the checking exists, selecting an optimal path according to a checking result; if the complex circuit path passing the verification does not exist, cutting off part of the load according to a general strategy, then searching the complex circuit path again according to the steps, carrying out safe retrieval and verification, and selecting an optimal path; the method comprises the following specific steps of cutting off part of the load according to a general strategy: firstly, cutting off partial loads according to the power supply capacity limit sequence table of the ultra-power grid, determining a non-power-restoration line according to the current-restoration line in turn by adopting a low-cycle according to an important user list and a low-cycle load reduction sequence table.
Generating a plan according to the optimal path, wherein the plan comprises a list of devices to be automatically remotely controlled and operated with operation sequences, and the method comprises the following specific steps: according to the supply path, automatically searching the equipment sequence required to be operated, and arranging according to the established accident handling logic sequence, namely generating the equipment sequence to be automatically remotely controlled and operated;
in this embodiment, the staff is also required to review the plan on the real-time plan interface, and the interface mainly includes four modules: 1. accident plan list: only when the faults happen together, the accident plan of the current fault is directly displayed; if the faults occur at the same time, double-clicking the corresponding accident plan name to enter a corresponding equipment list to be repressed, a transfer supply line list and an equipment sequence to be automatically remotely controlled; 2. list of devices to be repressed: the method comprises the following steps that a list of voltage loss equipment needing power supply is replied according to a preset plan; 3. transfer route list: displaying the name of a line through which the complex circuit path passes; 4. and (5) waiting for automatic remote control operation of equipment sequences.
And automatically executing a plan, and automatically executing the switch pulling-closing operation according to the operation sequence according to the list of the equipment to be automatically remotely controlled with the operation sequence.
Further, the fault information comprises accident transient process protection alarm, wave recording, switch deflection information, equipment protection signals and telemetering change data; the specific steps for determining the electronic system according to the fault information are as follows:
when a protection action signal and switch deflection are detected (when the following accidental conditions occur, the following accidental conditions are considered together, namely 1, a reclosing action signal, a switch on-off, a switch off-on and a switch on-off, 2, a bus coupler (switch off) or an incoming line spare power automatic switching action signal, and the switch is not deflected), starting a judgment program; after 20 seconds of delay, if the voltage amplitude of the bus is greater than 90% or the bus voltage is less than or equal to 0.2kV, judging that the source is a source voltage loss station;
scanning all associated stations of the source voltage loss station, if the associated stations have current and voltage 10S before the fault occurs and buses of the associated stations have no voltage after the fault occurs, judging that the associated stations are forced to be voltage loss stations, and finally generating a voltage loss station report.
Further, the specific steps of searching the complex path are as follows:
determining a power transmission power supply associated with the power loss electronic system; and according to a breadth-first search algorithm or a depth-first search algorithm, with a source voltage loss station as a starting point and a trend block diagram connecting line as a path, gradually extending and searching to a power transmission power supply to obtain a plurality of repeated paths.
Further, the complex circuit path should follow the following six prevention principles: 1. preventing non-synchronization; 2. preventing an operating overvoltage; 3. secondary fault impact of the main equipment is prevented; 4. preventing the impact of near zone faults; 5. preventing power transmission with ground wire; 6. prevent the remote control channel from being abnormal. Therefore, all complex circuit paths need to be retrieved safely, and the specific steps are as follows:
checking whether a gate of a grounding knife in the region is disconnected; setting switches at each side of an ungrounded main transformer, a small hydropower line switch and a low-cycle action feeder switch to be in a hot standby state; disconnecting the line switch of the station at the side of the complex electric path; if the complex circuit path is powered from a low voltage level, the soft clamp mode needs to be changed.
The method has the advantages that the scheme is automatically generated and executed on line, so that the workload of power grid workers is reduced; and can generate and execute corresponding plans comprehensively and flexibly according to the fault condition, thereby improving the power recovery efficiency.
Example two
Further, the verifying the content includes: the method comprises the following steps of (1) transfer capacity, network loss, load shedding, integral tide, voltage deviation and total number of switch operations; if the transfer capacity, network loss and load shedding of the complex circuit path do not reach the threshold values, the path is directly eliminated. Selecting an optimal path according to the following 4 principles: 1. the main transformer and the line in the control path are not overloaded; 2. the power transmission line is short in length and high in voltage; 3. the number of operation switches is small; 4. the whole tidal current is small. The formula for selecting the optimal path according to the verification result is as follows:
Ochose＝min(O1,O2,…,Oi,…,OH),i＝1,2,…,H
Oi＝r1·Llengthi+r2·Pflowi+r3·ΔUi+r4·Cti
in the formula: o ischoseNumbering the selected paths; h is the total number of generated paths; o isiSelecting a factor for the path; r is1～r4Respectively the length L of the path ilengthiOverall tidal current PflowiVoltage deviation DeltaUiAnd total number of switch operations CtiWeight of (2)
The embodiment has the advantages that the weight of each parameter can be selected autonomously according to different factors under different conditions, and the optimal path is selected; and a simple and reliable formula for selecting the optimal path is provided, the calculated amount is reduced, and the power recovery efficiency is improved. .
EXAMPLE III
Referring to fig. 1, an online generation and execution device for a grid accident handling plan comprises a memory and a processor, wherein the memory stores instructions, and the instructions are suitable for being loaded by the processor and executing the following steps:
determining a power-off electronic system according to fault information, wherein the power-off electronic system comprises a source power-off station and a forced power-off station;
searching a complex circuit path, wherein the complex circuit path is communicated with a power transmission power supply and a power loss electronic system;
carrying out safe retrieval on all the complex circuit paths, and abandoning the complex circuit paths which do not pass the safe retrieval;
checking the complex circuit paths which pass the safe retrieval, and if at least one complex circuit path which passes the checking exists, selecting an optimal path according to a checking result; if the complex circuit path passing the verification does not exist, cutting off part of the load according to a general strategy, then searching the complex circuit path again according to the steps, carrying out safe retrieval and verification, and selecting an optimal path; the method comprises the following specific steps of cutting off part of the load according to a general strategy: firstly, cutting off partial loads according to the power supply capacity limit sequence table of the ultra-power grid, determining a non-power-restoration line according to the current-restoration line in turn by adopting a low-cycle according to an important user list and a low-cycle load reduction sequence table.
Generating a plan according to the optimal path, wherein the plan comprises a list of devices to be automatically remotely controlled and operated with operation sequences, and the method comprises the following specific steps: according to the supply path, automatically searching the equipment sequence required to be operated, and arranging according to the established accident handling logic sequence, namely generating the equipment sequence to be automatically remotely controlled and operated;
in this embodiment, the staff is also required to review the plan on the real-time plan interface, and the interface mainly includes four modules: 1. accident plan list: only when the faults happen together, the accident plan of the current fault is directly displayed; if the faults occur at the same time, double-clicking the corresponding accident plan name to enter a corresponding equipment list to be repressed, a transfer supply line list and an equipment sequence to be automatically remotely controlled; 2. list of devices to be repressed: the method comprises the following steps that a list of voltage loss equipment needing power supply is replied according to a preset plan; 3. transfer route list: displaying the name of a line through which the complex circuit path passes; 4. and (5) waiting for automatic remote control operation of equipment sequences.
And automatically executing a plan, and automatically executing the switch pulling-closing operation according to the operation sequence according to the list of the equipment to be automatically remotely controlled with the operation sequence.
Further, the fault information comprises accident transient process protection alarm, wave recording, switch deflection information, equipment protection signals and telemetering change data; the specific steps for determining the electronic system according to the fault information are as follows:
when a protection action signal and switch deflection are detected (when the following accidental conditions occur, the following accidental conditions are considered together, namely 1, a reclosing action signal, a switch on-off, a switch off-on and a switch on-off, 2, a bus coupler (switch off) or an incoming line spare power automatic switching action signal, and the switch is not deflected), starting a judgment program; after 20 seconds of delay, if the voltage amplitude of the bus is greater than 90% or the bus voltage is less than or equal to 0.2kV, judging that the source is a source voltage loss station;
scanning all associated stations of the source voltage loss station, if the associated stations have current and voltage 10S before the fault occurs and buses of the associated stations have no voltage after the fault occurs, judging that the associated stations are forced to be voltage loss stations, and finally generating a voltage loss station report.
Further, the specific steps of searching the complex path are as follows:
determining a power transmission power supply associated with the power loss electronic system; and according to a breadth-first search algorithm or a depth-first search algorithm, with a source voltage loss station as a starting point and a trend block diagram connecting line as a path, gradually extending and searching to a power transmission power supply to obtain a plurality of repeated paths.
Further, the complex circuit path should follow the following six prevention principles: 1. preventing non-synchronization; 2. preventing an operating overvoltage; 3. secondary fault impact of the main equipment is prevented; 4. preventing the impact of near zone faults; 5. preventing power transmission with ground wire; 6. prevent the remote control channel from being abnormal. Therefore, all complex circuit paths need to be retrieved safely, and the specific steps are as follows:
checking whether a gate of a grounding knife in the region is disconnected; setting switches at each side of an ungrounded main transformer, a small hydropower line switch and a low-cycle action feeder switch to be in a hot standby state; disconnecting the line switch of the station at the side of the complex electric path; if the complex circuit path is powered from a low voltage level, the soft clamp mode needs to be changed.
The method has the advantages that the scheme is automatically generated and executed on line, so that the workload of power grid workers is reduced; and can generate and execute corresponding plans comprehensively and flexibly according to the fault condition, thereby improving the power recovery efficiency.
Example four
Further, the verifying the content includes: the method comprises the following steps of (1) transfer capacity, network loss, load shedding, integral tide, voltage deviation and total number of switch operations; if the transfer capacity, network loss and load shedding of the complex circuit path do not reach the threshold values, the path is directly eliminated. Selecting an optimal path according to the following 4 principles: 1. the main transformer and the line in the control path are not overloaded; 2. the power transmission line is short in length and high in voltage; 3. the number of operation switches is small; 4. the whole tidal current is small. The formula for selecting the optimal path according to the verification result is as follows:
Ochose＝min(O1,O2,…,Oi,…,OH),i＝1,2,…,H
Oi＝r1·Llengthi+r2·Pflowi+r3·ΔUi+r4·Cti
in the formula: o ischoseNumbering the selected paths; h is the total number of generated paths; o isiSelecting a factor for the path; r is1～r4Respectively the length L of the path ilengthiOverall tidal current PflowiVoltage deviation DeltaUiAnd total number of switch operations CtiThe weight of (a) is calculated,
the embodiment has the advantages that the weight of each parameter can be selected autonomously according to different factors under different conditions, and the optimal path is selected; and a simple and reliable formula for selecting the optimal path is provided, the calculated amount is reduced, and the power recovery efficiency is improved.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A power grid accident treatment plan online generation and execution method is characterized by comprising the following steps:
determining a power-off electronic system according to fault information, wherein the power-off electronic system comprises a source power-off station and a forced power-off station;
searching a complex circuit path, wherein the complex circuit path is communicated with a power transmission power supply and a power loss electronic system;
carrying out safe retrieval on all searched complex circuit paths, and abandoning complex circuit paths which do not pass the safe retrieval;
checking the complex circuit paths which pass the safe retrieval, and if at least one complex circuit path which passes the checking exists, selecting an optimal path according to a checking result; if the complex circuit path passing the verification does not exist, cutting off part of the load according to a general strategy, then searching the complex circuit path again according to the steps, carrying out safe retrieval and verification, and selecting an optimal path;
generating a plan according to the optimal path, wherein the plan comprises a list of devices to be automatically remotely controlled and operated with operation sequences;
and automatically executing a plan, and automatically executing the switch pulling-closing operation according to the operation sequence according to the list of the equipment to be automatically remotely controlled with the operation sequence.
2. The method for on-line generation and execution of the grid accident management plan according to claim 1, wherein: the fault information comprises accident transient process protection alarm, wave recording, switch deflection information, equipment protection signals and telemetering change data; the specific steps for determining the electronic system according to the fault information are as follows:
when a protection action signal and switch deflection are detected, starting a judgment program; after 20 seconds of delay, if the voltage amplitude of the bus is greater than 90% or the bus voltage is less than or equal to 0.2kV, judging that the source is a source voltage loss station;
and scanning all associated stations of the source voltage loss station, and if the associated stations have current and voltage 10S before the fault occurs and buses of the associated stations have no voltage after the fault occurs, determining that the station is forced to be voltage loss.
3. The method for on-line generation and execution of the grid accident handling plan according to claim 2, wherein: the specific steps of searching the multiplex path are as follows:
determining a power transmission power supply associated with the power loss electronic system; and according to a breadth-first search algorithm or a depth-first search algorithm, with a source voltage loss station as a starting point and a trend block diagram connecting line as a path, gradually extending and searching to a power transmission power supply to obtain a plurality of repeated paths.
4. The method for on-line generation and execution of the grid accident management plan according to claim 3, wherein: the specific steps of safely retrieving all the complex paths are as follows:
checking whether a gate of a grounding knife in the region is disconnected; setting switches at each side of an ungrounded main transformer, a small hydropower line switch and a low-cycle action feeder switch to be in a hot standby state; disconnecting the line switch of the station at the side of the complex electric path; if the complex circuit path is powered from a low voltage level, the soft clamp mode needs to be changed.
5. The method for on-line generation and execution of the grid accident management plan according to claim 4, wherein: the verification content comprises: the method comprises the following steps of (1) transfer capacity, network loss, load shedding, integral tide, voltage deviation and total number of switch operations; the specific formula for selecting the optimal path according to the verification result is as follows:
Ochose＝min(O1,O2,…,Oi,…,OH),i＝1,2,…,H
Oi＝r1·Llengthi+r2·Pflowi+r3·ΔUi+r4·Cti
in the formula: o ischoseNumbering the selected paths, and H is the total number of generated paths; o isiFor a path selection factor, r1～r4Respectively the length L of the path ilengthiOverall tidal current PflowiVoltage deviation DeltaUiAnd total number of switch operations CtiWeight of (2)
6. An online generation and execution device for a grid accident handling plan, comprising a memory and a processor, wherein the memory stores instructions adapted to be loaded by the processor and to perform the following steps:
determining a power-off electronic system according to fault information, wherein the power-off electronic system comprises a source power-off station and a forced power-off station;
searching a complex circuit path, wherein the complex circuit path is communicated with a power transmission power supply and a power loss electronic system;
carrying out safe retrieval on all searched complex circuit paths, and abandoning complex circuit paths which do not pass the safe retrieval;
checking the complex circuit paths which pass the safe retrieval, and if at least one complex circuit path which passes the checking exists, selecting an optimal path according to a checking result; if the complex circuit path passing the verification does not exist, cutting off part of the load according to a general strategy, then searching the complex circuit path again according to the steps, carrying out safe retrieval and verification, and selecting an optimal path;
generating a plan according to the optimal path, wherein the plan comprises a list of devices to be automatically remotely controlled and operated with operation sequences;
and automatically executing a plan, and automatically executing the switch pulling-closing operation according to the operation sequence according to the list of the equipment to be automatically remotely controlled with the operation sequence.
7. The method for on-line generation and execution of the grid accident management plan according to claim 6, wherein: the fault information comprises accident transient process protection alarm, wave recording, switch deflection information, equipment protection signals and telemetering change data; the specific steps for determining the electronic system according to the fault information are as follows:
when a protection action signal and switch deflection are detected, starting a judgment program; after 20 seconds of delay, if the voltage amplitude of the bus is greater than 90% or the bus voltage is less than or equal to 0.2kV, judging that the source is a source voltage loss station;
and scanning all associated stations of the source voltage loss station, and if the associated stations have current and voltage 10S before the fault occurs and buses of the associated stations have no voltage after the fault occurs, determining that the station is forced to be voltage loss.
8. The method for on-line generation and execution of the grid accident management plan according to claim 7, wherein: the specific steps of searching the multiplex path are as follows:
determining a power transmission power supply associated with the power loss electronic system; and according to a breadth-first search algorithm or a depth-first search algorithm, with a source voltage loss station as a starting point and a trend block diagram connecting line as a path, gradually extending and searching to a power transmission power supply to obtain a plurality of repeated paths.
9. The method for on-line generation and execution of the grid accident management plan according to claim 8, wherein: the specific steps of safely retrieving all the complex paths are as follows:
checking whether a gate of a grounding knife in the region is disconnected; setting switches at each side of an ungrounded main transformer, a small hydropower line switch and a low-cycle action feeder switch to be in a hot standby state; disconnecting the line switch of the station at the side of the complex electric path; if the complex circuit path is powered from a low voltage level, the soft clamp mode needs to be changed.
10. The method for on-line generation and execution of the grid accident management plan according to claim 9, wherein: the verification content comprises: the method comprises the following steps of (1) transfer capacity, network loss, load shedding, integral tide, voltage deviation and total number of switch operations; the specific formula for selecting the optimal path according to the verification result is as follows:
Ochose＝min(O1,O2,…,Oi,…,OH),i＝1,2,…,H
Oi＝r1·Llengthi+r2·Pflowi+r3·ΔUi+r4·Cti
in the formula: o ischoseNumbering the selected paths, and H is the total number of generated paths; o isiFor a path selection factor, r1～r4Respectively the length L of the path ilengthiOverall tidal current PflowiVoltage deviation DeltaUiAnd total number of switch operations CtiThe weight of (a) is calculated,
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