CN113193549A

CN113193549A - System and method for regulating and controlling transaction perception and fault co-processing

Info

Publication number: CN113193549A
Application number: CN202110363781.0A
Authority: CN
Inventors: 梁文腾; 李�杰; 李骁; 张佳楠; 余建明; 单连飞; 李如意; 屈晓旭; 张越; 闫威; 朱荣奇
Original assignee: State Grid Jiangsu Electric Power Co Ltd; Beijing Kedong Electric Power Control System Co Ltd
Current assignee: State Grid Jiangsu Electric Power Co Ltd; Beijing Kedong Electric Power Control System Co Ltd
Priority date: 2021-04-02
Filing date: 2021-04-02
Publication date: 2021-07-30
Anticipated expiration: 2041-04-02
Also published as: CN113193549B

Abstract

The invention discloses a system and a method for regulating and controlling transaction perception and fault cooperative disposal. According to the system, the risk of the power grid is analyzed through a fault intelligent sensing technology and information related to the power grid fault in an evenized and objective manner, regulation and control personnel are assisted to execute a staged power grid fault disposal process in a process guiding manner, and the functions of provincial and local fault cooperative disposal and information sharing are realized. Meanwhile, log electronic automatic recording is carried out on the fault handling flow and the content, and a complete fault handling report is formed. The intelligent and automatic level of the regulation and control system is obviously improved, and the workload of the regulation and control personnel is reduced.

Description

System and method for regulating and controlling transaction perception and fault co-processing

Technical Field

The invention relates to the field of power system fault disposal, in particular to a system and a method for regulating and controlling transaction perception and fault cooperative disposal.

Background

The modern power grid is a large-scale and highly complex nonlinear system, with the access of a large-scale intermittent power supply and a distributed power supply, the power grid trend and the strategy of system scheduling real-time operation control are more complex, the power grid fault probability and the whole-grid stable operation risk are obviously increased, especially the influence of large-scale power grid cascading faults on national economy is serious, and potential safety hazards are indirectly caused.

In recent years, with the continuous promotion of three-in-five-in-one power grid and intelligent power grid dispatching, the timeliness, safety and cooperativeness of accident handling are required to be improved when the power grid fails, and the lean management level of production is fundamentally improved. However, the existing fault handling means has simple strategy, poor capability, long time and low precision, and can not meet the operation requirement of the modern intelligent power grid. In order to improve the stable operation reliability of a power grid and guarantee the operation safety of the power supply network, a safe and reliable fault cooperative disposal process which can sense, quickly predict and assist real-time decision making is urgently needed, an effective solution and a multi-stage risk disposal strategy are provided for regulation and control of the power grid and emergency treatment of faults, so that the power grid accident disposal capacity is improved, the power grid faults are efficiently treated, the continuous expansion of an electric power safety hidden danger area is prevented, and a large-scale power failure accident is prevented.

Currently, with the help of construction and application of a power grid intelligent scheduling control system, a cooperative disposal function module for regulating and controlling real-time perception of an operation event and fault is already put into market use, but the existing means are more focused on data acquisition, monitoring, safety check and the like, and a fault disposal mode usually takes experience and manual analysis of related engineering technicians as main parts, so that a power grid fault scheduling decision has certain data one-sidedness and scheme limitation, and the lean management requirement of power grid fault disposal cannot be met: currently, an intelligent auxiliary decision-making means aiming at multiple equipment types based on an artificial intelligence technology is lacked; the safety early warning link before the power grid accident is lost, and the function is incomplete; the perception source of the regulation and control event is single, and the intelligent analysis function aiming at the power grid fault is lacked; the intelligent assistance capability in the power grid accident is insufficient, and a reasonable intelligent assistance decision suggestion cannot be given; in the process of handling the power grid accident, fault information between provincial and local two-stage dispatching cannot be shared in real time, and a cooperative linkage handling mechanism is lacked; the fault processing does not realize the automatic log recording function of the processing process, and the processing process cannot be subjected to repeated analysis after the fact.

Disclosure of Invention

The invention aims to provide a system and a method for regulating and controlling transaction perception and fault co-processing. According to the system, the risk of the power grid is analyzed through a fault intelligent sensing technology and information related to the power grid fault in an evenized and objective manner, regulation and control personnel are assisted to execute a staged power grid fault disposal process in a process guiding manner, and the functions of provincial and local fault cooperative disposal and information sharing are realized. Meanwhile, log electronic automatic recording is carried out on the fault handling flow and the content, and a complete fault handling report is formed. The intelligent and automatic level of the regulation and control system is obviously improved, and the workload of the regulation and control personnel is reduced.

In order to achieve the purpose, the regulation and control affair perception and fault cooperative disposal system comprises a fault perception module, a fault studying and judging module, a risk analysis module and a fault disposal module; the fault sensing module is used for sensing the power grid faults in a mode of monitoring fault information sent by the power grid comprehensive intelligent alarm system or manually additionally recorded power grid fault information in real time, and integrating a plurality of associated power grid faults into a single power grid fault event according to fault electrical distances and conditions that faults exist at intersections of public substations; acquiring power grid fault information, power grid operation information and power grid scheduling log information in a single power grid fault event; and matching the external data system associated information related to the power grid fault event according to the fault equipment name and the occurrence time range condition aiming at the single power grid fault event. The fault studying and judging module is used for identifying fault equipment corresponding to a single power grid fault event by combining power grid fault information of an external data system and aiming at the single power grid fault event, acquiring associated fault characteristic information of the fault equipment, and determining a fault source corresponding to the associated fault characteristic information according to a preset power grid fault studying and judging standard, so that different studying and judging conclusions are obtained, and fault studying and judging information is formed. And the risk analysis module analyzes the power grid operation state after the fault by adopting a network analysis technology and identifies various corresponding power grid operation risks. The fault handling module is used for providing various risk handling strategies and corresponding power restoration schemes by combining the external file of the power generation and utilization in the subarea and the external file of the load transfer adjustment mode in the subarea according to various power grid operation risks output by the risk analysis module and depending on power grid operation specifications.

A coordinated processing method for regulating and controlling transaction perception and provincial and local faults comprises the following steps:

s1, failure sensing: the fault sensing module senses the power grid faults in a mode of monitoring fault information sent by a power grid comprehensive intelligent alarm system or manually additionally recorded power grid fault information in real time, and integrates a plurality of associated power grid faults into a single power grid fault event according to fault electrical distances and conditions that faults exist at intersections of public substations; acquiring power grid fault information, power grid operation information and power grid scheduling log information in a single power grid fault event; aiming at a single power grid fault event, matching external data system associated information related to the power grid fault event according to the name of the fault equipment and the condition of the occurrence time range;

s2, fault study and judgment: the fault studying and judging module is combined with the power grid fault information of an external data system, and aiming at a single power grid fault event, fault equipment corresponding to the single power grid fault event is identified, associated fault characteristic information of the fault equipment is obtained, and a fault source corresponding to the associated fault characteristic information is determined according to a preset power grid fault studying and judging standard, so that different studying and judging conclusions are obtained, and fault studying and judging information is formed;

s3, risk analysis: the risk analysis module identifies the power grid operation information after the fault by adopting a network analysis technology, and identifies corresponding various power grid operation risks;

s4, failure handling: the fault handling module is used for providing a plurality of risk handling strategies and corresponding power restoration schemes by combining the external file of the power generation and utilization in the subarea and the external file of the load transfer adjustment mode in the subarea according to the operation specification of the power grid aiming at various power grid operation risks output by the risk analysis module;

s5, provincial and local synergy: the provincial and regional coordination module realizes the sharing and retrieval of fault information between a provincial dispatching system and a regional dispatching system, and the issuing of instructions and the reporting of results in the process of fault disposal;

s6, logging: the log recording module establishes a standardized closed-loop operation process and records a fault handling log in real time; tracking and monitoring the running state of the power grid after the fault occurs, and after the fault is treated and treated in real time, and recording information such as power grid risks, treatment strategies, task operations and the like under key time nodes in stages; and completing the duplicate analysis of the historical fault information and the disposal strategy after the fault event is ended.

The invention has the beneficial effects that:

1. the invention can instantly acquire and push the comprehensive intelligent alarm fault, trigger to complete fault perception, automatically acquire and integrate the associated fault, operation and log information of a plurality of regulating and controlling operation systems according to the fault event information, provide fault research and judgment analysis results and facilitate the overall excavation of the fault event source and the influence degree.

2. The invention adopts network analysis technologies such as topology search and the like to complete risk analysis, and calls sensitivity, partition electricity distribution balance and plan information to provide a dispatcher with post-accident staged disposal strategies and power restoration suggestions.

3. According to the invention, through provincial and local collaborative interaction, a standardized closed-loop operation flow is established, risk analysis is updated in real time, a disposal log is recorded, zero-scattered fault information is effectively integrated, the risk of manual disposal is reduced, and the efficiency, accuracy and normalization of power grid fault disposal are improved.

Drawings

FIG. 1 is a schematic diagram of the system of the present invention;

FIG. 2 is a system architecture diagram of the present invention;

FIG. 3 is a functional block diagram of the present invention;

the system comprises a fault sensing module 1, a fault studying and judging module 2, a risk analysis module 3, a fault handling module 4, a province and province cooperation module 5 and a log recording module 6.

Detailed Description

The invention is described in further detail below with reference to the following figures and specific examples:

the system for regulating and controlling transaction perception and cooperative disposal of provincial and local faults, as shown in fig. 1 and 2, comprises a fault perception module 1, a fault studying and judging module 2, a risk analysis module 3 and a fault disposal module 4; the fault perception module 1 is used for perceiving the power grid fault in a mode of monitoring fault information sent by a power grid comprehensive intelligent alarm system or manually additionally recorded power grid fault information in real time, and integrating a plurality of associated power grid faults into a single power grid fault event according to fault electrical distances and conditions that faults exist at intersections of public substations; acquiring power grid fault information, power grid operation information and power grid scheduling log information in a single power grid fault event; and matching the external data system associated information related to the power grid fault event according to the fault equipment name and the occurrence time range condition aiming at the single power grid fault event. The fault studying and judging module 2 is used for identifying fault equipment corresponding to a single power grid fault event by combining power grid fault information of an external data system and aiming at the single power grid fault event, acquiring associated fault characteristic information of the fault equipment, and determining a fault source corresponding to the associated fault characteristic information according to a preset power grid fault studying and judging standard, so that different studying and judging conclusions are obtained, and fault studying and judging information is formed. And the risk analysis module 3 analyzes the power grid operation state after the fault by adopting a network analysis technology and identifies various corresponding power grid operation risks. The fault handling module 4 is used for providing a plurality of risk handling strategies and corresponding power restoration schemes according to power grid operation specifications by combining the external file of the power generation and utilization of the subareas and the external file of the subarea load transfer adjustment mode aiming at various power grid operation risks output by the risk analysis module 3.

The regulation and control transaction perception and fault cooperative disposal system further comprises a provincial and regional cooperative module 5; the provincial and regional coordination module 5 is used for realizing the sharing and retrieval of the power grid fault information between the provincial dispatching system and the regional dispatching system, the issuing of the risk handling strategy and the reporting of the result in the corresponding power restoration scheme.

The regulation and control transaction perception and fault cooperative processing system further comprises a log recording module 6; the log recording module 6 is used for establishing a standardized closed-loop operation process and recording a risk disposal policy log in real time; and tracking and monitoring the running states of the power grid after the fault occurs, during risk disposal and after the risk disposal in real time, recording the risk of the power grid, a disposal strategy and task operation information under the key time node in stages, and finishing recording historical fault information and the disposal strategy after the fault event is finished.

In the technical scheme, the power grid fault information comprises fault characteristic information (equipment tripping condition, protection action condition, fault phase, reclosing action condition), fault brief report and wave recording information; the power grid operation information comprises three-span or three-remote information, section or equipment information (the equipment comprises primary power grid equipment information such as an alternating current line section, an alternating current line section endpoint, a transformer winding, a load, a bus, a breaker, a disconnecting link, a shunt capacitance reactor and the like), fault moment holographic power flow (real-time remote measurement and remote signaling), power grid topological model information and meteorological information; the power grid dispatching log information comprises live-line work, electrical defects, power grid events, operation mode adjustment, relay protection configuration information, recent equipment operation information, equipment maintenance application form information, accident handling plans, risk early warning notification and bus arrangement information; the external Data system power grid fault information comprises part of power grid operation information of a collected collection And monitoring Control system SCADA (Supervisory Control And Data acquisition), And specifically comprises three-span or three-remote information, section or equipment information, fault moment holographic power flow And power grid model information; part of scheduling log information of an OMS (outside Management System) of the power failure Management system specifically comprises live-line work, electrical defects, power grid events, operation mode adjustment, relay protection configuration information, equipment maintenance request form information, accident handling plans, risk early warning notification and bus arrangement; weather information of a weather monitoring system; fault brief report and wave recording information of the fault wave recording system; and monitoring basic fault characteristic information of the evenized system and recent equipment operation information of the intelligent operation ticket system.

In the above technical solution, the associated fault feature information includes an equipment trip condition, a protection action condition, a fault phase and a reclosing action condition; the power grid fault studying and judging conclusion is as follows:

conclusion I, investigation and judgment conclusion of a line fault

Example 1: a, protecting the line a, and if the phase c fails and the line a switch is successfully superposed, the line a fails;

example 2: the line a is in protection action, and meanwhile, if the phase c fails, the line a switches are not superposed to form three jumps, the line a fails;

example 3: the line a is in protection action, and if the switch of the line a is in direct three-hop state due to the c-phase fault, the line a is in fault;

conclusion II, b research and judgment conclusion of bus fault

Example (c): the AA station operates the bus differential protection of the b bus, and when the c-phase fault occurs, the related b1 switch, b2 switch and b3 switch are tripped, the b bus is in fault;

conclusion III, f research and judgment conclusion of main transformer fault

Example (c): the AA station is used for protecting the f main transformer, and when the c-phase fault and the f main transformer trip out, the f main transformer fails;

conclusion four, d research and judgment conclusion of switch failure

Example (c): the AA station performs line protection action, c-phase fault and failure protection action on the d line; simultaneously, an AA station e bus associated with the line d trips, and other switches except the line switch d trip, the switch d refuses to be operated;

note: a. the line d is not specific and can refer to any line;

b. the e bus is not specific and can refer to any bus;

the phase C is not specific and can be any phase of A phase, B phase and C phase;

the AA station is not specific and can refer to any transformer substation;

f, the main transformer is not specific and can be substituted for any main transformer;

the b1, b2, b3 and d switches are not specific and can refer to any switch.

In the technical scheme, the power grid operation risk comprises section out-of-limit, equipment overload, 220kV main transformer or bus power failure and power grid weak links; the equipment overload comprises main transformer overload and line overload; the identification method of the power grid operation risk specifically comprises the following steps:

risk one, cross section out of limit or equipment overload (including transformer winding, AC line segment)

The risk analysis module 3 monitors the running state of the power grid in real time, and counts the newly increased or out-of-limit-increased section out-of-limit condition within 2min of fault occurrence; the cross section out-of-limit judging mode is as follows: reading real-time section active and steady state quota data of the SCADA system, and if the section active power flow real-time value P_ir,secOver-section steady state limit value P_il,secI.e. P_ir,sec＞P_il,secRepresenting the existence of the operation risk of section out-of-limit; otherwise, none;

monitoring the running state of a power grid in real time, and counting the overload conditions of all main transformers and lines at present; the main transformer overload judging mode is as follows: reading real-time main transformer active power and rated capacity data of the SCADA system, and if the real-time value P of the main transformer active power_ir,xfmrExceeds the rated capacity S of the main transformer_in,xfmrI.e. P_ir,xfmr＞S_in,xfmrRepresenting the existence of such operational risks of overloading the main transformer; otherwise, thenNone;

the judgment mode of the line overload is as follows: reading real-time line current and current upper limit data and line phase current real-time value I of SCADA system_ir,lineExceeding the upper limit value I of the line current_il,lineI.e. I_ir,line＞I_il,lineRepresenting the presence of such operational risk of line overload; otherwise, none;

risk two, 220kV main transformer or bus loses the electricity

For a plant station with a voltage level of 220kV, if all main transformers or buses in any station lose power due to power grid faults, the main transformers do not have any transmission power in the downlink, and the risk exists; otherwise, none;

the judgment mode is that the risk analysis module 3 reads real-time telemetering information of an SCADA system of the acquisition and monitoring control system, which contains bus voltage, main transformer active or reactive power and line power information, and the following judgment is completed:

the bus power-loss judging conditions comprise that the bus load is zero, the bus voltage is zero and the bus busbar differential protection does not act; when the bus power-off total judgment condition is met, the bus power-off is identified as follows:

the main transformer power loss judging conditions comprise that main transformer active power is zero, main transformer reactive power is zero, and main transformer main protection and backup protection do not act; when the main transformer power loss judgment condition is met, the main transformer power loss is identified as follows:

risk three, weak link of power grid

The weak link of the power grid comprises a newly-added single-line grid-connected condition of a local power grid, and the specific weak link judgment method comprises the following steps:

firstly, the risk analysis module 3 is combined with a power grid topology model provided by an SCADA (supervisory control and data acquisition), any line (N-1) in the power grid topology model is switched on and off, the line breaking fault of the switched-off line is scanned, whether the conditions of a single plant station 220kV main transformer or bus full stop, dead island separation or island separation of any power supply area exist in the power grid topology or not is judged, and the information of the switched-off line and plant stations at two ends is recorded, namely weak link information;

secondly, the risk analysis module 3 is combined with a power grid model provided by an SCADA (supervisory control and data acquisition) to cut off a plurality of lines (the same tower and rack conditions) in the power grid model topology (N-2), scans the broken line fault of the cut-off line, judges whether any power supply area dead island separation exists in the power grid topology, and records the cut-off line and station information at two ends, namely weak link information;

and finally, the weak link information needs to be newly added local power grid single-line grid connection (the weak link before the fault needs to be eliminated), namely, the judgment (N-1 or N-2) of the local power grid single-line grid connection is carried out before and after the fault respectively, the two times of judgment are recorded, and the newly added information after the fault is obtained through comparison.

In the technical scheme, the risk handling strategy belongs to a first stage of fault handling, and specifically comprises unit output adjustment, rapid load transfer, accident power limit pull, remote strong power transmission without inspection, operation mode adjustment and emergency shooting, and is used for rapidly eliminating power grid operation risks caused by power grid fault events; the power recovery scheme belongs to a second stage of fault handling, and specifically comprises bus bar arrangement adjustment, conventional load transfer, equipment power transmission, mode adjustment recovery and ordered power utilization, and is used for recovering power supply.

In the above technical solution, the risk disposal policy is a corresponding disposal policy given according to different power grid operation risks, and the specific contents are as follows:

the first power grid operation risk: cross section out of limit or equipment overload

Case 1, there is only a cross-sectional out-of-limit

Strategy 1.1, unit output adjustment:

strategy 1.1.1, the fault handling module 4 obtains sensitivity information (positive and negative sensitivities) of the active power of the out-of-limit section to the unit by combining with a sensitivity analysis method in network analysis, and the sensitivity of the out-of-limit section to any unit in the system can be calculated by the following formula by considering the directionality of branches included in the transmission section:

wherein, P_i,secActive power for out-of-limit section, P_j,GIs the active power of the unit node,

represents a branch b_kCorresponding row number, N, in the branch sensitivity matrix D_TIs the number of branches;

strategy 1.1.2, respectively sequencing the positive sensitivity and the negative sensitivity in a descending order according to the absolute value of the sensitivity, respectively obtaining the sensitivity information of the first five units which are sequenced in the front, and forming adjustable unit sensitivity list information which comprises an adjustable unit name, an influence section name and a sensitivity value of the section to the unit;

strategy 1.1.3, preferentially selecting the unit with large absolute value of sensitivity value for adjustment, calculating the unit adjustment number and the active power flow reduction amount of the section which can eliminate the section out-of-limit until the elimination of the out-of-limit or the maximum reduction of the out-of-limit, wherein the calculation method comprises the following steps:

wherein, Δ P_i,secFor the section i active power flow reduction amount,

the coefficient matrix is adjusted for the unit,

for the active adjustment vector, k, of all adjustable units_jjAdjustment of coefficient, P, for a single unit_j,GFor active adjustment of a single unit, n_s,GFor adjustable total number of units, N_GFor eliminating the units with out-of-limit cross-sectionAdjusting the number;

the strategy 1.1.4, if the reduction of the active power flow of the section exceeds the more limit of the section, stopping the analysis of the output adjustment strategy of the unit; otherwise, the strategy 1.1.3 is repeated until the cross section is eliminated or the full sensitivity is selected:

strategy 1.1.5, and finally, the unit output adjustment strategy provided by the fault handling module 4 includes information of the unit to be adjusted, including the unit adjustment number N_GSensitivity value S of section to unit_isec,jGSet adjustment amount P_j,GAnd the reduction amount delta P of the active power flow of the section_i,sec；

Strategy 1.2, fast load transfer strategy:

1.2.1, if the unit output adjustment strategy of the strategy 1.1 cannot completely eliminate the section out-of-limit, calculating the residual out-of-limit amount of the section;

the strategy 1.2.2, in combination with the sensitivity analysis method in network analysis, calculates the sensitivity information (positive sensitivity) of the out-of-limit fault to the load, and the specific calculation method is as follows: considering the directionality of the branches contained in the out-of-limit section, the sensitivity S of the out-of-limit section to any load node_isec,jLCan be calculated by the following formula:

wherein, P_i,secActive power for out-of-limit section, P_j,LIs the active power of the load node,

strategy 1.2.3, sorting the positive sensitivity in descending order according to the absolute value, obtaining the load sensitivity information which is sorted at the top (top five), forming an adjustable load sensitivity list which comprises adjustable load names, influencing section names and the sensitivity value of the sections to the loads, and preferentially selecting the load with large sensitivity value for adjustment;

strategy 1.2.4, matching the content of the compiled external file partition load transfer adjustment modes (divided into one-six types, 6 types and descending priority) with the load sensitivity, namely, if the sensitivity of the load to be transferred in the partition load transfer adjustment modes is positioned in the ordered list of the external offline file partition load transfer adjustment modes, the matching is successful;

strategy 1.2.5, verifying feasibility of the load transfer scheme after successful matching, and comparing load quantity delta R to be transferred of the scheme with power supply margin R of the load transfer partition_nTo determine the feasibility of the solution (the partition power supply margin information can be analyzed directly from the partition power generation external file), the power supply margin R of the partition n_nThe calculation formula is as follows:

R_n＝P_max,n-P_r,n (7)

wherein, P_max,nMaximum power supply capability for partition n; p_r,nThe real-time power supply value of the partition n is obtained;

when delta R < R_nWhen the load is transferred to a subarea to meet the power supply requirement, the transfer scheme is feasible; when Δ R > R_nWhen the load is transferred to the load subarea, the power supply capacity is insufficient, and the transfer scheme is not feasible;

strategy 1.2.6, for all feasible schemes, a transfer strategy with high priority in an external file partition load transfer adjustment mode is preferentially selected; if the same-level strategy exists, the load sensitivity is distinguished, and a transfer strategy with high sensitivity is preferentially selected;

strategy 1.2.7, based on the transfer strategy selected in the previous step, calculating the load adjustment number and the reduction of the active power flow of the section, which can eliminate the out-of-limit of the residual section, until the out-of-limit is eliminated or the out-of-limit is reduced to the maximum extent, and the calculation method is as follows:

wherein, Δ P_i,secFor the section i active power flow reduction amount,

in order to adjust the coefficient matrix for the load,

for the active adjustment vector, k, of all adjustable loads_jjFor a single load adjustment factor, P_j,LRated capacity for a single load, 0.9P_j,LActive adjustment for a single load, n_s,LFor adjustable total number of loads, N_LThe number of load adjustments for eliminating cross-section violations;

a strategy 1.2.8, if the active power flow reduction of the section exceeds the remaining limit of the section, terminating the rapid load transfer strategy analysis; otherwise, the strategy 1.2.4-1.2.7 are repeated continuously until the cross section is eliminated and the sensitivity is selected:

policy 1.2.9, the fast load transfer policy that the failure handling module 4 can provide is partition load information to be transferred, including the load adjustment number N_LActive adjustment of single load of 0.9P_j,LSensitivity value S of section to unit_isec,jLActive power flow reduction delta P of section_i,secTransferring the load out of the subarea and transferring the load into the subarea;

strategy 1.3, emergency power draw limit:

1.3.1, if the strategy 1.2 is completely implemented, the out-of-limit still cannot be completely eliminated, and calculating the residual out-of-limit amount of the section;

strategy 1.3.2, using the sensitivity list (positive sensitivity) of the out-of-limit fault to the load calculated in strategy 1.2, if there is any unadjusted load sensitivity information in the list, i.e. the number of load adjustments N mentioned above_L＜n_s,LThen the strategy 1.3 pull-up limit power adjustment is continued,if the sensitivity of the load in the list has been adjusted completely, i.e. N_L＝n_s,LTerminating the first stage strategy;

strategy 1.3.3 if N_L＜n_s,LCalculating the load adjustment number and the active power flow reduction of the cross section, which can eliminate the cross section, repeating the step until the cross section is eliminated, wherein the calculation method can refer to the formulas (8) to (9);

strategy 1.3.4, if the active power flow reduction of the section exceeds the remaining limit of the section, stopping the electric-power-pulling-limiting strategy analysis of the accident; otherwise, continuing to repeat the strategy 1.3.3 until the cross section is eliminated and the sensitivity of all loads is selected;

policy 1.3.5, the accident pull limit policy that the fault handling module 4 can provide is to-be-pulled limit electrical load information, including load adjustment number N_LSection sensitivity to load value S_isec,jLLoad adjustment amount P_j,LAnd the reduction amount delta P of the active power flow of the section_i,sec；

Case 2, there is only device overload

Strategy 2.1, unit output adjustment:

strategy 2.1.1, combining the sensitivity analysis method in network analysis, obtaining the sensitivity information (positive and negative sensitivity) S of the branch (including main transformer and line two kinds of overload equipment) where the overload equipment is located to any unit_ibran,jGThe calculation formula is as follows:

wherein, P_i,branActive power, P, for the overloaded branch_j,GIs the active power of the unit node,

represents a branch b_kCorresponding in branch sensitivity matrix DLine number, N_TIs the number of branches;

strategy 2.1.2, respectively sequencing the positive sensitivity and the negative sensitivity in a descending order according to the absolute value of the sensitivity, respectively obtaining the sensitivity information of the units which are sequenced at the front (the first five), and forming an adjustable unit sensitivity list which comprises the name of the adjustable unit, the name of an influencing branch and the sensitivity value of the branch to the unit;

strategy 2.1.3, preferentially selecting the set with large sensitivity value for adjustment, and calculating the set adjustment number and branch flow reduction amount for eliminating the branch threshold crossing until the threshold crossing is eliminated;

wherein, Δ P_i,branThe active power flow reduction for branch i,

the coefficient matrix is adjusted for the unit,

for the active adjustment vector, k, of all adjustable units_jjAdjustment of coefficient, P, for a single unit_j,GFor active adjustment of a single unit, n_s,GFor adjustable total number of units, N_GAdjusting the number of the units capable of eliminating the overload of the branch;

strategy 2.1.4, if the reduction of the active power flow of the branch exceeds the limit of the branch, stopping the analysis of the output adjustment strategy of the unit; otherwise, continuing to repeat the strategy 2.1.3 until the branch overload is eliminated or the whole sensitivity is selected;

the strategy 2.1.5, the unit output adjustment strategy that the fault handling module 4 can provide is the information of the unit to be adjusted, including the unit adjustment number N_GSensitivity value S of branch to unit_ibran,jGMachine set adjustmentTotal amount P_j,GAnd branch current reduction Δ P_i,bran；

Strategy 2.2, emergency power draw limit:

strategy 2.2.1, if the output adjustment strategy of the unit of strategy 2.1 can not completely eliminate overload, calculating the residual overload capacity of the branch;

strategy 2.2.2, combining sensitivity analysis method in network analysis, obtaining sensitivity information (positive sensitivity) S of branch to any load_ibran,jLThe calculation formula is as follows:

wherein, P_i,branActive power, P, for the overloaded branch_j,LIs the active power of the load node,

strategy 2.2.3, respectively sorting the positive sensitivities in a descending order according to the sensitivity sizes, and respectively obtaining the load sensitivity information which is sorted in the front (the first five), so as to form an adjustable load sensitivity list which comprises adjustable load names, influencing branch names and sensitivity values of the branches to the loads;

and 2.2.4, preferentially selecting the load sensitivity value to be large for adjustment, and calculating the number of load adjustment and the branch flow reduction amount which can eliminate the branch threshold crossing until the branch threshold crossing is eliminated, wherein the calculation is as follows:

wherein, Δ P_i,branThe active power flow reduction for branch i,

in order to adjust the coefficient matrix for the load,

strategy 2.2.5, if the branch power flow reduction amount exceeds the branch residual overload amount, stopping the accident power-pulling-limiting strategy analysis; otherwise, the strategy 2.2.4 is repeated until the branch overload is eliminated or the full sensitivity is selected:

policy 2.2.6, the accident pull limit policy that the fault handling module 4 can provide is to-be-pulled limit electrical load information, including the load adjustment number N_LSensitivity value S of branch to load_ibran,jLLoad adjustment amount 0.9P_j,LAnd branch current reduction Δ P_i,bran；

Strategy 2.3, fast load transfer strategy:

the strategy 2.3.1 is that the power limiting loads of the pull-limit power strategy are transferred one by one to recover power supply according to the power limiting information of the accident pull-limit power strategy and the compiled content of the external file partition load transfer adjustment mode;

strategy 2.3.2, matching the compiled content of external file partition load transfer adjustment modes (divided into one-six types, 6 types and descending priority) with the power limiting information, namely, if the load to be transferred of the external off-line file partition load transfer adjustment modes is located in the power limiting information list of the accident power-pulling limiting strategy, the matching is successful;

strategy 2.3.3, verifying feasibility of load transfer scenario after successful matchAnd comparing the load quantity delta R to be transferred with the power supply margin R of the load transfer subarea_nTo determine the feasibility of the solution (the partition power supply margin information can be analyzed directly from the partition power generation external file), the power supply margin R of the partition n_nThe calculation formula is as follows:

R_n＝P_max,n-P_r,n (18)

strategy 2.3.4, for all feasible schemes, a transfer strategy with high priority in an external offline file partition load transfer adjustment mode is preferentially selected;

policy 2.3.5, the fast load transfer policy that the failure handling module 4 can provide is load information of the partition to be transferred, including power-limited load transfer amount 0.9P_j,LTransferring the load out of the subarea and transferring the load into the subarea;

case 3, out-of-section and equipment overload coexistence

When the cross section is out of limit and the equipment is overloaded, providing a strategy to preferentially solve the equipment overload;

strategy 3.1, unit output adjustment, handling of equipment overload

A strategy 3.1.1, obtaining sensitivity information (positive and negative sensitivities) of a branch (comprising a main transformer and two types of line out-of-limit equipment) to a unit by combining a sensitivity analysis method in network analysis;

strategy 3.1.2, respectively sequencing the positive sensitivity and the negative sensitivity in a descending order according to the absolute value of the sensitivity, respectively obtaining the sensitivity information of the unit which is sequenced at the front (the first five), and forming an adjustable unit sensitivity list;

strategy 3.1.3, preferentially selecting the set with large sensitivity value for adjustment, calculating the set adjustment number and branch flow reduction amount capable of eliminating the branch out-of-limit until eliminating the out-of-limit, and calculating the modes in the formulas (12) to (13);

strategy 3.1.4, if the reduction amount of the branch active power flow exceeds the branch overload amount, stopping the analysis of the unit output adjustment strategy; otherwise, continuing to repeat the strategy 3.1.3 until the branch overload is eliminated or the whole sensitivity is selected;

the strategy 3.1.5, the unit output adjustment strategy provided by the fault handling module 4 is information of the unit to be adjusted, and the information comprises the unit adjustment number, the sensitivity value of the branch to the unit, the unit adjustment total amount and the branch tide reduction amount;

strategy 3.2, emergency power draw limit, handling equipment overload

Strategy 3.2.1, if the unit output adjustment cannot completely eliminate the equipment overload, directly calculating the residual limit of the branch;

strategy 3.2.2, obtaining sensitivity information (positive sensitivity) of the overload branch to the load by combining a sensitivity analysis method in network analysis;

strategy 3.2.3, sorting the positive sensitivity in descending order according to the sensitivity to obtain the load sensitivity information sorted in the front (top five), and forming an adjustable load sensitivity list;

strategy 3.2.4, preferentially selecting the adjustment with large load sensitivity value, calculating the load adjustment number and branch load flow reduction amount capable of eliminating the branch overload until the overload is eliminated, and calculating the modes in the formulas (16) to (17);

strategy 3.2.5, if the branch power flow reduction amount exceeds the branch residual overload amount, stopping the accident power-limiting strategy analysis; otherwise, the strategy 3.2.4 is repeated until the branch overload is eliminated or the full sensitivity is selected:

strategy 3.2.6, providing load information of the power limit to be pulled, wherein the load information comprises the number of load adjustment, the sensitivity value of the branch to the load, the total amount of load adjustment and the branch tidal current reduction amount;

strategy 3.3, fast load transfer strategy, handling section out-of-limit

A strategy 3.3.1, if the cross section out-of-limit is completely eliminated when the treatment equipment is overloaded, directly skipping the strategy, and if the cross section out-of-limit cannot be completely eliminated, calculating the residual out-of-limit amount of the cross section;

a strategy 3.3.2, which combines a sensitivity analysis method in network analysis to obtain sensitivity information (positive sensitivity) of the out-of-limit section to the load;

strategy 3.3.3, sorting the positive sensitivity in descending order according to the absolute value of the sensitivity to obtain the load sensitivity information which is sorted in the front (top five), forming an adjustable load sensitivity list, and preferentially selecting the load sensitivity with a large value for adjustment;

strategy 3.3.4, matching the contents of the compiled external file partition load transfer adjustment modes (divided into 6 types of one to six types with descending priority) with the load sensitivity, and preferentially selecting a transfer strategy with high priority; if the same-level strategy exists, distinguishing the load sensitivity, and preferentially selecting the transfer strategy with high sensitivity, namely, if the load sensitivity to be transferred in the partition load transfer adjustment mode is positioned in the sorted list, the matching is successful;

strategy 3.3.5, calculating the load adjustment number and the active power flow reduction of the section, which can eliminate the out-of-limit of the residual section, until the out-of-limit is eliminated or the out-of-limit is reduced to the maximum extent, and calculating reference formulas (8) to (9);

strategy 3.3.6, if the active power flow reduction of the section exceeds the residual limit of the section, terminating the rapid load transfer strategy analysis; otherwise, continuing to repeat the strategy 3.3.4-3.3.5 until the cross section is eliminated and the whole sensitivity is selected:

strategy 3.3.7, providing load information of the subareas to be transferred, including load transfer amount, load transfer out of the subareas, load transfer into the subareas and active power flow reduction of the cross section;

strategy 3.4, accident power limiting, handling section out-of-limit

Strategy 3.4.1, if the cross section out-of-limit cannot be completely eliminated by the rapid load transfer strategy, calculating the residual out-of-limit amount of the cross section;

a strategy 3.4.2, using the sensitivity information (positive sensitivity) of the out-of-limit section to the load, if the sensitivity adjustment amount of the load remains, continuing the pull-limit power adjustment, if the sensitivity information does not remain, terminating the strategy of the first stage of the out-of-limit section;

strategy 3.4.3, calculating the load adjustment number and the active power flow reduction amount of the cross section which can eliminate the cross limit until the cross limit is eliminated or the cross limit is reduced to the maximum extent, and calculating modes refer to formulas (8) to (9);

strategy 3.4.4, if the active power flow reduction of the section exceeds the remaining limit of the section, stopping the electric-power-pulling-limiting strategy analysis of the accident; otherwise, continuing to repeat the strategy 3.4.3 until the cross section is eliminated and the sensitivity of all loads is selected;

strategy 3.4.5, providing load information of the limited power to be pulled, wherein the load information comprises the load adjustment number, the sensitivity value of the section to the load, the total load adjustment amount and the active power flow reduction amount of the section;

policy 3.5, fast load transfer policy, handle device overload

According to the strategy 3.5.1, matching contents are carried out according to the power limiting information of the strategy four-accident power pulling and limiting strategy, the compiled content of the partition load transfer adjustment mode and the load sensitivity, and the power limiting loads of the power pulling and limiting strategy are transferred one by one to recover power supply;

strategy 3.5.2, matching the compiled content of external file partition load transfer adjustment modes (divided into one-six types, 6 types and descending priority) with the power limiting information, namely, if the load to be transferred of the external file partition load transfer adjustment modes is positioned in the power limiting information list of the accident power pulling and limiting strategy, the matching is successful;

and (8) a strategy 3.5.3 for verifying the feasibility of the load transfer scheme after successful matching and comparing the load quantity delta R to be transferred of the scheme with the power supply margin R of the load transfer subarea_nTo determine the feasibility of the solution (the partition power supply margin information can be analyzed directly from the partition power generation external file), the power supply margin R of the partition n_nThe calculation formula is referred to as formula (18);

a policy 3.5.4, wherein for all feasible schemes, a transfer policy with a higher priority in the external file partition load transfer adjustment mode is preferentially selected;

strategy 3.5.5, providing load information of the subareas to be transferred, wherein the load information comprises the electricity-limiting load transfer amount, load transfer-out subareas and load transfer-in subareas;

and operating risk II of the power grid: weak link

According to the risk analysis module 3, integrating the obtained weak link information to obtain a weak link analysis conclusion, such as: the station G is connected with the grid through a single line through a line f (the line is weak equipment), and the current power grid is weak in operation;

and (3) a weak link, namely a local power grid single-line grid-connected disposal strategy, distinguishing according to whether the local power grid contains a power plant, if:

weak link 1, local grid power plant-free (split into electric death island)

The weak link strategy is 1.1, the local dispatching is informed, and the line inspection is carried out on the line b;

the weak link strategy is 1.2, and remote strong power transmission is not carried out through inspection;

weak link 2, local grid with power plant (island operation after disconnection)

A weak link strategy 2.1 is used for notifying local dispatching, performing line inspection on the line b and controlling zero power balance of the line b;

the weak link strategy is 2.2, and remote strong power transmission is not carried out through inspection;

regarding weak link strategies 1.2 and 2.2, the following description is made, wherein according to the scheduling regulation specification, the remote strong power transmission conditions without checking are divided into: judging personnel conditions, basic conditions, additional conditions and negative conditions;

"personnel conditions" include "short term field inspection disabled"; "basic conditions" include "interval no abnormal alarm", "master station no abnormal or defect"; "additional conditions" include "remote inspection", "personnel safety in the station"; "negative conditions" include "no cable", "no live-line operation in station", "possible fault in station" and "no tower fall, no line break, no climbing"; the conditions are determined according to provincial dispatching regulations, when the remote forced transmission operation without inspection is required to be carried out on the line, the conditions need to be confirmed one by power grid regulation and control personnel, and the forced transmission operation is carried out after all the conditions are met.

In the above technical solution, the starting time of the fault handling second-stage power restoration scheme is after the fault handling first-stage strategy is completed; the specific contents in the fault handling second-stage power restoration scheme are not prioritized and all belong to a post-trigger mode when the conditions are met; the specific content in the fault handling second stage power restoration scheme comprises the following steps:

in the complex power scheme 1, equipment power transmission comprises 'remote forced transmission through inspection' and 'remote trial transmission through inspection'

Different equipment types are distinguished, and the fault handling module 4 automatically pushes different power transmission condition editing templates, specifically:

aiming at a feed line and a connecting line, a power transmission mode of 'strong transmission at a remote place after inspection' is adopted;

aiming at a charging wire, a power transmission mode of 'remote trial transmission through inspection' is adopted;

aiming at a bus and a main transformer, a power transmission mode of 'remote trial transmission through inspection' is adopted;

according to the scheduling specification, "checked distant heavy power transmission" includes "affirmative condition" and "negative condition"; the 'positive condition' comprises 'no abnormity of primary equipment', 'no abnormity of secondary equipment', 'correct protection and reclosing', 'all main transformer line switches on a bus where a feeding switch of a feeding station is located are disconnected', and 'no threat to personnel in the station by power transmission'; the 'negative condition' comprises 'no cable', 'no live-wire operation in station', 'no tower falling, no broken wire and no climbing';

the checked remote power transmission test comprises a positive condition, a protection action condition and a line patrol condition; "positive conditions" include "no abnormality in primary equipment", "no abnormality in secondary equipment", and "no safety threat to personnel in the station by supplying power to the fault trip circuit"; the protection action condition comprises that protection and reclosing signals act correctly; the 'line patrol condition' comprises 'confirming that normal operation is not influenced after line patrol inspection';

the conditions are determined according to provincial dispatching regulations, when the remote forced delivery or trial delivery operation of the checked fault equipment needs to be carried out, the conditions need to be confirmed one by power grid regulation and control personnel, and the power delivery operation is carried out after all the conditions are met;

multiple electricity scheme 2, orderly power utilization

If the power grid operation risk of the type of equipment overload exists, an accident power pulling and limiting strategy and a quick load transfer strategy are provided in the first stage of fault handling, or only the accident power pulling and limiting strategy is provided, and the total power pulling and limiting quantity is greater than the total quick load transfer quantity, the second stage handling strategy is triggered;

if the power grid risk of the type of cross section out-of-limit exists, a rapid load transfer strategy and an accident power limiting pulling strategy are provided in the first stage of fault handling, and the total power limiting pulling quantity is larger than the total power limiting pulling quantity, the second stage handling strategy is triggered;

finally, analytical conclusions are provided, such as: "the electric load of the subarea 1 cannot exceed the maximum power supply capacity P of the subarea_max”；

Multiple current scheme 3, bus tie bar adjustment

For the line fault output by the fault sensing module 1, reading bus bar arrangement information of the OMS system and acquiring bus bar arrangement adjustment content;

filtering and screening bus bar content, matching a fault device (only when a line has a fault, the bus bar content exists) scheduling number with a station to which any end of the line belongs, and obtaining fault-related inverted bus bar information;

the bus tie bar adjustment is one of the power supply recovery modes after the power grid line fault, and the common adjustment mode is the bus bar reversing operation, such as: "a station, 4W89 or 46R1 on-off, 4W90 switch adjusted to positive bus running, 11 months and 22 days in 2019";

power restoration scheme 4, mode adjustment restoration

Adjusting the content of the determined operation mode of the fault handling first stage 'fast load transfer strategy' to restore the original state, such as: "turn b master change from partition 1 to partition 2", reverse the above recorded contents, such as: "transfer b main transformer from partition 2 to partition 1";

multiple Power scheme 5, conventional load transfer

Analyzing and acquiring a subarea power supply margin value P of 4 hours in the future by combining with an external file for subarea power generation and utilization_margin(ii) a Obtaining the existence margin gap (i.e. the power supply margin value P of the subarea)_margin<0) The method is implemented by the following specific implementation mode that the conventional load transfer between the subareas is completed according to the information such as the subarea name, the power supply margin value and the like:

firstly, matching partition information with a margin gap (less than 0) with partition load transfer adjustment modes (6 types divided into one to six types with descending priority) provided by an external file, and outputting matching information;

secondly, verifying the feasibility of the transfer scheme, comparing the load amount to be transferred of each scheme with the future state power supply margin of the received load partition, and if the margin is greater than the load, the scheme is feasible; otherwise, the scheme is not feasible (for all feasible schemes, a transfer strategy with high priority is preferably selected);

and finally, providing future state low margin partition information, partition load information to be transferred and the like.

A method for regulating transaction awareness and fault co-processing, as shown in fig. 3, includes the following steps:

s1, failure sensing: the fault perception module 1 perceives the power grid fault in a mode of monitoring fault information sent by a power grid comprehensive intelligent alarm system or manually additionally recorded power grid fault information in real time, and integrates a plurality of associated power grid faults into a single power grid fault event according to fault electrical distances and conditions that faults exist at a public substation intersection; acquiring power grid fault information, power grid operation information and power grid scheduling log information in a single power grid fault event; aiming at a single power grid fault event, matching external data system associated information related to the power grid fault event according to the name of the fault equipment and the condition of the occurrence time range;

s2, fault study and judgment: the fault studying and judging module 2 is combined with the power grid fault information of an external data system, identifies fault equipment corresponding to a single power grid fault event aiming at the single power grid fault event, acquires associated fault characteristic information of the fault equipment, and determines a fault source corresponding to the associated fault characteristic information according to a preset power grid fault studying and judging standard, so that different studying and judging conclusions are obtained, and fault studying and judging information is formed;

s3, risk analysis: the risk analysis module 3 identifies the power grid operation information after the fault by adopting a network analysis technology, and identifies corresponding various power grid operation risks;

s4, failure handling: the fault handling module 4 is used for providing a plurality of risk handling strategies and corresponding power restoration schemes according to power grid operation specifications by combining the external file of the power generation and utilization in the subarea and the external file of the subarea load transfer adjustment mode aiming at various power grid operation risks output by the risk analysis module 3;

s5, provincial and local synergy: the provincial and regional coordination module 5 realizes the sharing and retrieval of fault information between the provincial dispatching system and the regional dispatching system, the issuing of instructions and the reporting of results in the process of fault disposal;

s6, logging: the log recording module 6 establishes a standardized closed-loop operation process and records a fault handling log in real time; tracking and monitoring the running state of the power grid after the fault occurs, and after the fault is treated and treated in real time, and recording information such as power grid risks, treatment strategies, task operations and the like under key time nodes in stages; and completing the duplicate analysis of the historical fault information and the disposal strategy after the fault event is ended.

Details not described in this specification are within the skill of the art that are well known to those skilled in the art.

Claims

1. The system for regulating and controlling transaction perception and fault co-processing is characterized in that: the system comprises a fault sensing module (1), a fault studying and judging module (2), a risk analysis module (3) and a fault handling module (4);

the fault perception module (1) is used for perceiving the power grid fault in a mode of monitoring fault information sent by a power grid comprehensive intelligent alarm system or manually additionally recorded power grid fault information in real time, and integrating a plurality of associated power grid faults into a single power grid fault event according to fault electrical distances and conditions that faults exist in public substation cross points;

acquiring power grid fault information, power grid operation information and power grid scheduling log information in a single power grid fault event;

aiming at a single power grid fault event, matching external data system associated information related to the power grid fault event according to the name of the fault equipment and the condition of the occurrence time range;

the fault studying and judging module (2) is used for identifying fault equipment corresponding to a single power grid fault event by combining power grid fault information of an external data system aiming at the single power grid fault event, acquiring associated fault characteristic information of the fault equipment, and determining a fault source corresponding to the associated fault characteristic information according to a preset power grid fault studying and judging standard, so that different studying and judging conclusions are obtained, and fault studying and judging information is formed;

the risk analysis module (3) analyzes the power grid operation state after the fault by adopting a network analysis technology, and identifies various corresponding power grid operation risks;

the fault handling module (4) is used for providing various risk handling strategies and corresponding power restoration schemes for various power grid operation risks output by the risk analysis module (3) by combining the external file of the power generation and utilization in the subarea and the external file of the subarea load transfer adjustment mode according to the power grid operation specifications.

2. The system for regulating and controlling transaction perception and fault co-processing is characterized in that: the system also comprises a provincial and regional coordination module (5); the provincial and regional coordination module (5) is used for realizing the sharing and retrieval of the power grid fault information between the provincial dispatching system and the regional dispatching system, the issuing of the risk handling strategy and the reporting of the result in the corresponding power restoration scheme.

3. The system for regulating and controlling transaction perception and fault co-processing is characterized in that: the device also comprises a logging module (6); the log recording module (6) is used for establishing a standardized closed-loop operation process and recording a risk handling strategy log in real time; and tracking and monitoring the running states of the power grid after the fault occurs, during risk disposal and after the risk disposal in real time, recording the risk of the power grid, a disposal strategy and task operation information under the key time node in stages, and finishing recording historical fault information and the disposal strategy after the fault event is finished.

4. The regulated transaction-aware and fault co-handling system according to claim 1, wherein: the power grid fault information comprises fault characteristic information, fault brief report and wave recording information; the power grid operation information comprises three-span or three-remote information, section or equipment information, fault moment holographic power flow, power grid topological model information and meteorological information; the power grid dispatching log information comprises live-line work, electrical defects, power grid events, operation mode adjustment, relay protection configuration information, recent equipment operation information, equipment maintenance application form information, accident handling plans, risk early warning notification and bus arrangement information;

the external data system power grid fault information comprises part of power grid operation information of a collection and monitoring control system SCADA (supervisory control and data acquisition), and specifically comprises three-span or three-remote information, section or equipment information, fault moment holographic power flow and power grid model information; part of scheduling log information of an OMS (operation management system) specifically comprises live-line work, electrical defects, power grid events, operation mode adjustment, relay protection configuration information, equipment maintenance request form information, accident handling plans, risk early warning notification and bus arrangement; weather information of a weather monitoring system; fault brief report and wave recording information of the fault wave recording system; and monitoring basic fault characteristic information of the evenized system and recent equipment operation information of the intelligent operation ticket system.

5. The regulated transaction-aware and fault co-handling system according to claim 1, wherein:

the associated fault characteristic information comprises equipment tripping condition, protection action condition, fault phase and reclosing action condition;

the power grid fault studying and judging conclusion is as follows:

conclusion I, investigation and judgment conclusion of a line fault

conclusion II, b research and judgment conclusion of bus fault

conclusion III, f research and judgment conclusion of main transformer fault

conclusion four, d research and judgment conclusion of switch failure

note: a. the line d is not specific and can refer to any line;

b. the e bus is not specific and can refer to any bus;

the AA station is not specific and can refer to any transformer substation;

the b1, b2, b3 and d switches are not specific and can refer to any switch.

6. The regulated transaction-aware and fault co-handling system according to claim 1, wherein:

the power grid operation risks comprise section out-of-limit, equipment overload, 220kV main transformer or bus power failure and power grid weak links; the equipment overload comprises main transformer overload and line overload;

the identification method of the power grid operation risk specifically comprises the following steps:

risk one, cross section out of limit or equipment overload

The risk analysis module (3) monitors the running state of the power grid in real time, and counts the newly increased or out-of-limit-increased section out-of-limit condition within 2min of fault occurrence; the cross section out-of-limit judging mode is as follows: reading real-time section active and steady state quota data of the SCADA system, and if the section active power flow real-time value P_ir,secOver-section steady state limit value P_il,secI.e. P_ir,sec＞P_il,secRepresenting the existence of the operation risk of section out-of-limit; otherwise, none;

monitoring the running state of a power grid in real time, and counting the overload conditions of all main transformers and lines at present; the main transformer overload judging mode is as follows: reading real-time main transformer active power and rated capacity data of the SCADA system, and if the real-time value P of the main transformer active power_ir,xfmrExceeds the rated capacity S of the main transformer_in,xfmrI.e. P_ir,xfmr＞S_in,xfmrRepresenting the existence of such operational risks of overloading the main transformer; otherwise, none;

risk two, 220kV main transformer or bus loses the electricity

the judgment mode is that the risk analysis module (3) reads real-time telemetering information of an SCADA system of the acquisition and monitoring control system, which comprises bus voltage, main transformer active or reactive power and line power information, and the following judgment is completed:

risk three, weak link of power grid

firstly, the risk analysis module (3) is combined with a power grid topology model provided by an SCADA (supervisory control and data acquisition), any line in the power grid topology model is disconnected, the disconnection fault of the disconnected line is scanned, whether the conditions of a single plant station 220kV main transformer or bus full stop, dead island separation or island separation of any power supply area exist in the power grid topology or not is judged, and the disconnected line and plant station information at two ends are recorded, namely weak link information;

secondly, the risk analysis module (3) is combined with a power grid model provided by the SCADA to cut off a plurality of lines in the power grid model topology, the broken line fault of the cut-off line is scanned, whether dead island separation of any power supply area exists in the power grid topology or not is judged, and information of the cut-off line and plant stations at two ends is recorded, namely weak link information;

and finally, the weak link information needs to be newly added with local power grid single-line grid connection, namely, the judgment of the local power grid single-line grid connection is respectively carried out before and after the fault, the judgment is carried out twice, and the newly added information after the fault is obtained by comparison.

7. The regulated transaction-aware and fault co-handling system according to claim 1, wherein:

the risk handling strategy belongs to a first stage of fault handling, and specifically comprises unit output adjustment, rapid load transfer, accident power drawing and limiting, remote strong power transmission without inspection, operation mode adjustment and emergency shooting, and is used for rapidly eliminating power grid operation risks caused by power grid fault events;

the power recovery scheme belongs to a second stage of fault handling, and specifically comprises bus bar arrangement adjustment, conventional load transfer, equipment power transmission, mode adjustment recovery and ordered power utilization, and is used for recovering power supply.

8. The regulated transaction-aware and fault co-handling system according to claim 1, wherein: the risk disposal strategy is a corresponding disposal strategy according to different power grid operation risks, and the specific contents are as follows:

Case 1, there is only a cross-sectional out-of-limit

Strategy 1.1, unit output adjustment:

strategy 1.1.1, the fault handling module (4) combines a sensitivity analysis method in network analysis to obtain sensitivity information (positive and negative sensitivities) of active power of the out-of-limit section to the unit, and the sensitivity of the out-of-limit section to any unit in the system can be calculated by the following formula in consideration of the directivity of branches included in the transmission section:

wherein, Δ P_i,secFor the section i active power flow reduction amount,

the coefficient matrix is adjusted for the unit,

for the active adjustment vector, k, of all adjustable units_jjAdjustment of coefficient, P, for a single unit_j,GFor active adjustment of a single unit, n_s,GFor adjustable total number of units, N_GThe number of the units can be adjusted to eliminate the section out-of-limit;

strategy 1.1.5, and finally, the unit output adjustment strategy provided by the fault handling module (4) comprises the unit information to be adjusted, including the unit adjustment number N_GSensitivity value S of section to unit_isec,jGSet adjustment amount P_j,GAnd the reduction amount delta P of the active power flow of the section_i,sec；

Strategy 1.2, fast load transfer strategy:

the strategy 1.2.2, in combination with a sensitivity analysis method in network analysis, calculates sensitivity information of the out-of-limit fault to the load, and the specific calculation method is as follows: considering the directionality of the branches contained in the out-of-limit section, the sensitivity S of the out-of-limit section to any load node_isec,jLCan be calculated by the following formula:

strategy 1.2.3, sorting the positive sensitivity in descending order according to the absolute value, obtaining the load sensitivity information which is sorted at the front, forming an adjustable load sensitivity list which comprises adjustable load names, influencing section names and the sensitivity value of the sections to the load, and preferentially selecting the load sensitivity value to be adjusted in a large order;

strategy 1.2.4, matching the compiled content of the external file partition load transfer adjustment mode with the load sensitivity, namely, if the sensitivity of the load to be transferred in the partition load transfer adjustment mode is positioned in the ordered list of the external offline file partition load transfer adjustment mode, the matching is successful;

strategy 1.2.5, verifying feasibility of the load transfer scheme after successful matching, and comparing load quantity delta R to be transferred of the scheme with power supply margin R of the load transfer partition_nTo determine the feasibility of the scheme, the supply margin R of the partition n_nThe calculation formula is as follows:

R_n＝P_max,n-P_r,n (7)

wherein, P_max,nMaximum power supply capability for partition n; p_r,nThe real-time power supply value of the partition n is obtained; when delta R < R_nWhen the load is transferred to a subarea to meet the power supply requirement, the transfer scheme is feasible; when Δ R > R_nWhen the load is transferred to the load subarea, the power supply capacity is insufficient, and the transfer scheme is not feasible;

wherein, Δ P_i,secFor the section i active power flow reduction amount,

in order to adjust the coefficient matrix for the load,

policy 1.2.9, the fast load transfer policy that the failure handling module (4) can provide is the load information of the partition to be transferred, including the load adjustment number N_LActive adjustment of single load P_j,LSensitivity value S of section to unit_isec,jLActive power flow reduction delta P of section_i,secTransferring the load out of the subarea and transferring the load into the subarea;

strategy 1.3, emergency power draw limit:

strategy 1.3.2, using the sensitivity list of the out-of-limit fault to the load calculated in strategy 1.2, if there is any unadjusted load sensitivity information in the list, i.e. the load adjustment number N_L＜n_s,LThen continue with policy 1.3 pull-up power adjustment, if the load sensitivities in the list have all been adjusted, i.e., N_L＝n_s,LTerminating the first stage strategy;

strategy 1.3.5, the accident pull limit strategy provided by the fault handling module (4) is to-be-pulled limit electric load information, including load adjustment number N_LSection sensitivity to load value S_isec,jLLoad adjustment amount P_j,LAnd the reduction amount delta P of the active power flow of the section_i,sec；

Case 2, there is only device overload

Strategy 2.1, unit output adjustment:

strategy 2.1.1, combining sensitivity analysis method in network analysis, obtaining sensitivity information S of overload equipment branch to any unit_ibran,jGThe calculation formula is as follows:

strategy 2.1.2, respectively sequencing the positive sensitivity and the negative sensitivity in a descending order according to the absolute value of the sensitivity, respectively obtaining the sensitivity information of the units which are sequenced in the front, and forming an adjustable unit sensitivity list which comprises the name of the adjustable unit, the name of an influence branch and the sensitivity value of the branch to the unit;

wherein, Δ P_i,branThe active power flow reduction for branch i,

the coefficient matrix is adjusted for the unit,

the strategy 2.1.5, the unit output adjustment strategy provided by the fault handling module (4) is the information of the unit to be adjusted, and the information comprises the unit adjustment number N_GSensitivity value S of branch to unit_ibran,jGAdjusting total amount P of unit_j,GAnd branch current reduction Δ P_i,bran；

Strategy 2.2, emergency power draw limit:

strategy 2.2.2, combining sensitivity analysis method in network analysis, obtaining sensitivity information S of branch to any load_ibran,jLThe calculation formula is as follows:

strategy 2.2.3, respectively sorting the positive sensitivities in a descending order according to the sensitivity sizes, respectively obtaining the load sensitivity information which is sorted in the front, and forming an adjustable load sensitivity list which comprises adjustable load names, influencing branch names and sensitivity values of the branches to the loads;

wherein, Δ P_i,branThe active power flow reduction for branch i,

in order to adjust the coefficient matrix for the load,

policy 2.2.6, the accident pull limit policy that the fault handling module (4) can provide is to-be-pulled limit electrical load information, including the load adjustment number N_LSensitivity value S of branch to load_ibran,jLLoad adjustment amount 0.9P_j,LAnd branch current reduction Δ P_i,bran；

Strategy 2.3, fast load transfer strategy:

strategy 2.3.2, matching the compiled external file partition load transfer adjustment mode content with the power limiting information, namely, if the load to be transferred of the external off-line file partition load transfer adjustment mode is located in the power limiting information list of the accident power-pulling limiting strategy, the matching is successful;

and 2.3.3, verifying the feasibility of the load transfer scheme after successful matching, and comparing the load quantity delta R to be transferred of the scheme with the power supply margin R of the load transfer partition_nTo determine the feasibility of the scheme, the supply margin R of the partition n_nThe calculation formula is as follows:

R_n＝P_max,n-P_r,n (18)

policy 2.3.5, the failure handling module (4) may provideThe fast load transfer strategy is load information of the subareas to be transferred, and comprises the electricity-limited load transfer amount of 0.9P_j,LTransferring the load out of the subarea and transferring the load into the subarea;

case 3, out-of-section and equipment overload coexistence

strategy 3.1, unit output adjustment, handling of equipment overload

The strategy 3.1.1, in combination with a sensitivity analysis method in network analysis, obtains sensitivity information of the branch to the unit;

strategy 3.1.2, respectively sequencing the positive sensitivity and the negative sensitivity in a descending order according to the absolute value of the sensitivity, respectively obtaining the sensitivity information of the units in the front of the sequence, and forming an adjustable unit sensitivity list;

the strategy 3.1.5, the unit output adjustment strategy provided by the fault handling module (4) is information of the unit to be adjusted, and the information comprises the unit adjustment number, the sensitivity value of the branch to the unit, the unit adjustment total amount and the branch flow reduction amount;

strategy 3.2, emergency power draw limit, handling equipment overload

strategy 3.2.2, combining the sensitivity analysis method in network analysis to obtain the sensitivity information of the overload branch to the load;

strategy 3.2.3, sorting the positive sensitivity in descending order according to the sensitivity to obtain the load sensitivity information sorted in the front order and form an adjustable load sensitivity list;

strategy 3.3, fast load transfer strategy, handling section out-of-limit

a strategy 3.3.2, obtaining sensitivity information of the out-of-limit section to the load by combining a sensitivity analysis method in network analysis;

strategy 3.3.3, sorting the positive sensitivity in descending order according to the absolute value of the sensitivity to obtain the load sensitivity information which is sorted at the front, forming an adjustable load sensitivity list, and preferentially selecting the load sensitivity value to be adjusted;

strategy 3.3.4, matching the compiled external file partition load transfer adjustment mode content with the load sensitivity, and preferentially selecting a transfer strategy with high priority; if the same-level strategy exists, distinguishing the load sensitivity, and preferentially selecting the transfer strategy with high sensitivity, namely, if the load sensitivity to be transferred in the partition load transfer adjustment mode is positioned in the sorted list, the matching is successful;

strategy 3.4, accident power limiting, handling section out-of-limit

a strategy 3.4.2, using sensitivity information of the out-of-limit section to the load, if the sensitivity adjustment amount of the load remains, continuing to pull the limit power adjustment, if no sensitivity information remains, terminating the strategy of the first stage of the section out-of-limit;

policy 3.5, fast load transfer policy, handle device overload

According to the strategy 3.5.1, matching contents are carried out according to the power limiting information of the accident power limiting strategy and the compiled partition load transfer adjustment mode contents and the load sensitivity, and the power limiting loads of the power limiting strategy are transferred one by one to recover power supply;

strategy 3.5.2, matching the compiled external file partition load transfer adjustment mode content with the power limiting information, namely, if the load to be transferred of the external file partition load transfer adjustment mode is located in the power limiting information list of the accident power limiting pulling strategy, the matching is successful;

and (8) a strategy 3.5.3 for verifying the feasibility of the load transfer scheme after successful matching and comparing the load quantity delta R to be transferred of the scheme with the power supply margin R of the load transfer subarea_nTo determine the feasibility of the scheme, the supply margin R of the partition n_nThe calculation formula is referred to as formula (18);

and operating risk II of the power grid: weak link

According to the risk analysis module (3), integrating the obtained weak link information to obtain a weak link analysis conclusion;

and (3) a weak link, namely a local power grid single-line grid-connected disposal strategy, distinguishing according to whether the local power grid contains a power plant:

weak link 1, local power grid power-free plant

weak link 2, local power grid with power plant

regarding the weak link policy 1.2 and the policy 2.2, the following description is made, wherein according to the scheduling regulation specification, the remote strong power transmission conditions without checking are divided into: judging personnel conditions, basic conditions, additional conditions and negative conditions;

personnel conditions include short term inability to field inspection; the basic conditions comprise interval abnormal alarm, and no abnormality or defect of the master station; additional conditions include remote inspection, in-station personnel safety; negative conditions comprise no cable, no live-line operation in the station, possible fault in the station, no tower falling, no disconnection and no climbing; the conditions are determined according to provincial dispatching regulations, when the remote forced transmission operation without inspection is required to be carried out on the line, the conditions need to be confirmed one by power grid regulation and control personnel, and the forced transmission operation is carried out after all the conditions are met.

9. The regulated transaction-aware and fault co-handling system according to claim 1, wherein: the starting time of the fault handling second-stage power restoration scheme is after the fault handling first-stage strategy is completed; the specific contents in the fault handling second-stage power restoration scheme are not prioritized and all belong to a post-trigger mode when the conditions are met; the specific content in the fault handling second stage power restoration scheme comprises the following steps:

in the power recovery scheme 1, equipment is powered on, and the power transmission comprises remote forced transmission through inspection and remote trial transmission through inspection;

different equipment types are distinguished, and the fault handling module (4) automatically pushes different power transmission condition editing templates, specifically:

aiming at a feed line and a connecting line, a power transmission mode of strong power transmission in a remote position through inspection is adopted;

aiming at a charging wire, a power transmission mode of remote trial transmission through inspection is adopted;

aiming at a bus and a main transformer, a power transmission mode of remote trial transmission through inspection is adopted;

according to the scheduling regulation specification, the checked remote strong power transmission comprises a positive condition and a negative condition; the positive conditions comprise that primary equipment is not abnormal, secondary equipment is not abnormal, protection and reclosing are correct, all main transformer line switches on a bus where a feeding switch of the feeding station is located are disconnected, and power transmission does not threaten personnel in the station; negative conditions comprise no cable, no live-line operation in a station, no tower falling, no disconnection and no climbing;

the checked remote power transmission test comprises an affirming condition, a protection action condition and a line patrol condition; the positive conditions comprise that primary equipment is not abnormal, secondary equipment is not abnormal, and safety threat to personnel in the station cannot be caused by power transmission to a fault trip circuit; the protection action condition comprises protection and correct action of a reclosing signal; the line patrol condition comprises that normal operation is not influenced after line patrol inspection is confirmed;

multiple electricity scheme 2, orderly power utilization

If the equipment overload type power grid operation risk exists, an accident power pulling and limiting strategy and a rapid load transfer strategy are already provided in the first stage of fault handling, or only the accident power pulling and limiting strategy is provided, and the total power pulling and limiting quantity is greater than the total rapid load transfer quantity, the second stage handling strategy is triggered;

if the power grid risk of the section out-of-limit type exists, a rapid load transfer strategy and an accident power-limiting pulling strategy are provided in the first stage of fault handling, and the total power-limiting pulling strategy is larger than the total rapid load transfer strategy, the second stage handling strategy is triggered;

finally, an analysis conclusion is provided that the electrical load of the partition 1 cannot exceed the maximum power supply capacity P of the partition_max；

Multiple current scheme 3, bus tie bar adjustment

For the line fault output by the fault sensing module (1), reading bus bar arrangement information of an OMS (operation management system) to obtain bus bar arrangement adjustment content;

filtering and screening bus bar arrangement content, and matching a fault equipment scheduling number with a station to which any end of the line belongs to obtain fault-related inverted bus bar information;

the bus bar arrangement adjustment is used as one of power supply recovery modes after a power grid line fault, and the common adjustment mode is bus bar reversing operation;

power restoration scheme 4, mode adjustment restoration

Adjusting the operation mode determined by the fault handling first-stage rapid load transfer strategy to restore the original state of the content;

multiple Power scheme 5, conventional load transfer

Analyzing and acquiring a subarea power supply margin value P of 4 hours in the future by combining with an external file for subarea power generation and utilization_margin(ii) a Obtaining the power supply margin value P of the subarea with margin gap_margin<The information such as the partition name and the power supply margin value of 0 completes the conventional load transfer between the partitions, and the specific implementation mode is as follows:

first, there will be a margin gap P_margin<The partition information of 0 is matched with a partition load transfer adjustment mode provided by an external file, and matching information is output;

secondly, verifying the feasibility of the transfer scheme, comparing the load amount to be transferred of each scheme with the future state power supply margin of the received load partition, and if the margin is greater than the load, the scheme is feasible; otherwise, the scheme is not feasible;

and finally, providing the information of the future-state low-margin partition and the information of the partition load to be transferred.

10. A method for regulatory transaction awareness and fault co-location using the system of claim 1, comprising the steps of:

s1, failure sensing: the fault perception module (1) perceives the power grid fault in a mode of monitoring fault information sent by a power grid comprehensive intelligent alarm system or manually additionally recorded power grid fault information in real time, and integrates a plurality of associated power grid faults into a single power grid fault event according to fault electrical distances and conditions that faults exist at a public substation intersection; acquiring power grid fault information, power grid operation information and power grid scheduling log information in a single power grid fault event; aiming at a single power grid fault event, matching external data system associated information related to the power grid fault event according to the name of the fault equipment and the condition of the occurrence time range;

s2, fault study and judgment: the fault studying and judging module (2) is combined with the power grid fault information of an external data system, and aiming at a single power grid fault event, fault equipment corresponding to the single power grid fault event is identified, associated fault characteristic information of the fault equipment is obtained, and a fault source corresponding to the associated fault characteristic information is determined according to a preset power grid fault studying and judging standard, so that different studying and judging conclusions are obtained, and fault studying and judging information is formed;

s3, risk analysis: the risk analysis module (3) identifies the power grid operation information after the fault by adopting a network analysis technology, and identifies corresponding various power grid operation risks;

s4, failure handling: the fault handling module (4) is used for providing a plurality of risk handling strategies and corresponding power restoration schemes according to power grid operation specifications by combining the partition power generation and utilization external files and the partition load transfer adjustment mode external files aiming at various power grid operation risks output by the risk analysis module (3);

s5, provincial and local synergy: the provincial and local cooperation module (5) realizes the sharing and retrieval of fault information between a provincial dispatching system and a regional dispatching system, and the issuing of instructions and the reporting of results in the process of fault disposal;

s6, logging: the log recording module (6) establishes a standardized closed-loop operation process and records a fault handling log in real time; tracking and monitoring the running state of the power grid after the fault occurs, and after the fault is treated and treated in real time, and recording information such as power grid risks, treatment strategies, task operations and the like under key time nodes in stages; and completing the duplicate analysis of the historical fault information and the disposal strategy after the fault event is ended.