CN106711996A - Bus voltage failure fault power supply recovery and switching operation sequence generating method - Google Patents

Abstract

The invention discloses a bus voltage failure fault power supply recovery and switching operation sequence generating method, which comprises the steps of establishing a CSP model of a power distribution network, and adopting a dynamic asynchronous backtracking algorithm to look for a method which satisfies a constrained relationship and loads a load to a contact element with an optimized target function, generating a switching operation sequence generating method based on the contact elements through comparing variation of loading methods of the contact elements before and after power supply recovery, and supplying an obtained switching operation sequence result to an operation command system for a dispatcher to perform decision execution or automatic execution, so that the power supply recovery speed is faster. The bus voltage failure fault power supply recovery and switching operation sequence generating method adopts the switching operation sequence generating method based on the variation of the loading methods of the contact elements before and after power supply recovery, is simple and easy in operation, cannot cause the situations that the power supply recovery requirements are not satisfied due to feeder overload or closed loop and the like, is feasible in the existing power distribution network structure, is convenient for implementation, and facilitates the dispatcher to transfer the loads quickly and safely when large-area power outage such as bus voltage failure occurs.

Description

A kind of bus loss of pressure failure service restoration and switching operation generation method

Technical field：

The recovery process powered during the large-area power-cuts caused the present invention relates to a kind of power distribution network bus loss of pressure and power supply Recover the generation method of switching operation, belong to field of feeder automation.

Background technology：

With the development and growth in the living standard of social economy, people are increasingly strong to the dependence of electric energy, to power supply The requirement of reliability is also improved constantly, and power distribution network scale is big and wiring is complicated, and the system failure caused by accidentalia is to be difficult to Avoid.The failure that power distribution network takes place frequently is this kind of microvariations of feeder fault, for this microvariations, if dispatcher turns by rule of thumb Move non-faulting dead electricity load and typically do not result in more major break down, the success rate of transfer load is also higher, but as bus loss of pressure Though this large area blackout takes place frequently unlike feeder fault, there is generation every year substantially, only process by rule of thumb often Misoperation can be caused to cause feeder line overload or cause the greater area of loss of power accident to occur, and can only made by rule of thumb Obtain fault handling time long, cause more economic losses, it is therefore necessary to which the power supply for studying bus loss of pressure failure afterload is extensive Compound method simultaneously generates sequence of switching operations.

The service restoration of power distribution network refers to how to be realized to non-faulting power supply interrupted district on the basis of fault location and isolation Service restoration optimization problem.Power distribution network service restoration is substantially exactly the network reconfiguration after breaking down, and is to position simultaneously After having isolated failure, on the premise of the various constraints of power distribution network are met, by changing contact element and block switch in network Folding condition, finds for the optimal service restoration method of one or several object functions.

For this problem of power distribution network service restoration, the solution that can be taken has a lot, for example：Use heuristic search Method finds recovery scheme；Fuzzy evaluation is carried out to candidate scheme with the method for fuzzy mathematics；With genetic algorithm, simulated annealing The intelligent algorithms such as method, expert system approach carry out optimizing；Service restoration can also be realized using multi-agent technology.And it is directed to large area The research of this service restoration problem that has a power failure is fewer, and existing method has mathematical optimization technique, genetic algorithm, multiple agent to be immunized Algorithm, tabu search algorithm etc., more have document to consider after distributed power source is accessed service restoration after power distribution network large-area power-cuts Method.Tabu search algorithm to initial value, Tabu Length, candidate solution number have very strong dependence, operation result it is possible to Fall into local optimum, it is impossible to ensure that one surely obtains globally optimal solution.Genetic algorithm is also easy to produce substantial amounts of infeasible solution, for matching somebody with somebody Network optimization quality reconstruction preferably, but is not very applicable for wide-area failures load restoration problem.The present invention is used Service restoration method based on CSP models, using asynchronous backtracking algorithm optimizing, while the significance level of load is considered, finally For the ease of dispatcher's fast and safely transfer load, the invention provides a kind of switching operation generation method.

The content of the invention：

The technical problems to be solved by the invention are：There is provided it is a kind of based on CSP models and consider load significance level and The bus loss of pressure failure service restoration and switching operation generation method of contact element loading load method change, are easy to scheduling Personnel's quick and safe transfer load in this large-area power-cuts of generation bus loss of pressure.

The present invention is for the technical solution adopted for solving the technical problem：

A kind of bus loss of pressure failure service restoration and switching operation generation method, load restoration is reducing loss of outage Maximum turns to object function, and power distribution network reconfiguration result is presented in the form of contact element loading load method change, switching manipulation Order specifically includes following steps to be generated based on the change of contact element loading load method before and after service restoration：

A, the network parameter for reading distribution system：

Using simplified model of distribution networks, will power distribution network regard a kind of figure as, the feeder switch along distribution line is regarded as The summit of figure, the feeder line between two summits, in order to calculate simplicity, ignores three-phase imbalance factor, it is assumed that distribution as the side of figure Online voltage is equal everywhere, and the line load electric current for representing phase reflects, sets up the data structure of representation system network parameter, i.e., The matrix D description of the row of N rows 8 is defined, i.e.,：

Wherein, d_i1The sequence number on (i=1,2 ... N) description side；d_i2~d_i4The sequence number of the node that description connects with the side, T The side connects with three nodes when connecing；d_i5~d_i7Be with this while adjoining while sequence number, T connect it is corresponding abutted while with three, d_i8The payload on the side is represented, is represented with the electric current for representing phase；Idle element is -1 in D matrix；

B, bus loss of pressure judge and isolated fault that each contact element loads the mode of load after preservation failure cut-out：

If certain voltage of bus is dropped to by normal value is approximately 0, and the electric current of the N number of source point being connected with the bus or The voltage and current of the chopped-off head switch of the corresponding distribution line of person is dropped to by normal value and is approximately 0, then can determine whether to be bus loss of pressure, General N desirable 2~5；Bus breaks down, and system automatically cuts off the source point breaker isolated fault being connected with the bus, while The information of the load that other contact elements that preservation is connected with cut off feeder line are loaded；

C, distribution network load service restoration optimization is carried out, show that each contact element after recovering loads the mode of load：

Power distribution network constraint satisfaction problemx CSP models are built, CSP models are described as a triple P=(X, D, C), and X is change Quantity set, is denoted here as contact element collection；D is the cartesian product of the domain of definition of each element in X, D_iRepresent i-th contact Element loads the mode collection of load, and it is node that each way is all used to switch, and load is the load tree representation on side；C is constraint Collection, service restoration scheme must is fulfilled for constraining C, and distribution network load is recovered must to be fulfilled for following constraint：

(1) node voltage is in allowed band；

(2) contact element load is no more than rated value；

(3) radiation net mode operation；

(1) (2) are constrained in the domain of definition internal inspection of variable and is met, constraint (3) is equivalent to each load by a connection Network power elements, i.e., the load that any two contact elements are loaded does not have identical element, using matrix R as shown below_ijCome Represent the restriction relation between two contact elements：

Wherein, the mode that the mode of the loading load of contact element i has m kinds, the loading load of contact element j has n kinds, unit A is taken when in the pth kind loading load method of part i and the q kinds loading load method of element j without identical element_pqIt is 1, comprising phase Value is 0 during with element；

R_ijIn matrix element can not arbitrarily arrange, the mode of all loading loads in each contact element is first pressed into mesh Scalar functions are arranged from big to small, and are numbered in this order and then drawn constraint matrix；Consider that object function has a power failure for maximum reduction Economic loss, that is, the corresponding total interruption cost of load for being loaded is maximum, and formula is：

Wherein, N_iIt is the number of the load of contact element i loadings；k_bFor the corresponding unit loss of outage of b-th load takes With although some sensitive users unit interruption costs less, belong to sensitiveness load, power failure will also result in big shadow Ring, this seasonal k*k_bInstead of k_b, k takes 3~5；p_bIt is b-th size of load, is reflected with electric current；

After establishing constraint satisfaction problemx model, then need to carry out the search of optimal solution, algorithm is recalled using dynamic asynchronous Scan for, find out the confession of the corresponding loss of outage maximum of load for not only meeting constraints but also causing total contact element loading Electric recovery scheme, show that the contact element after optimization loads the mode of load；

D, the change for loading load method by contrasting each contact element before and after power distribution network service restoration draw service restoration The switching operation of process；

Switching operation should meet claimed below：

(1) operating process keeps the operation of network radiation mode；

(2) overload is not produced in operating process；

(3) the big load of loss of outage should be as early as possible reverted in operating process to power.

In step " D ", the switching operation of the service restoration process, what it was generated comprises the following steps that：

The first step：A contact element is taken out from variables set X, by the load pair of contact element loading before service restoration The sequence number on the side answered is put into queue F_BIn, the sequence number on the corresponding side of load of contact element loading is put into queue after service restoration F_AIn, contrast F_BAnd F_A, the load tree of the contact element institute band and the excision from the load tree are newly accessed after drawing service restoration Feeder load, queue F is put into by the sequence number on the new corresponding side of feeder load for accessing load tree_inIn, will be cut off from load tree The sequence number on the corresponding side of feeder load be put into queue F_outIn；

Second step：By queue F_inAnd F_outIn element by connected mode classify, if F_in(F_out) in element and the queue The element all without syntople, is then put into queue F by other either elements_in1(F_out1) in；Other are had the element of syntople It is divided into different load strings, and regards each load string as an entirety and is put into queue F_in2(F_out2) in, between different load string Without syntople；By F_in1And F_in2In element by power failure economic loss expense from big to small in respective queue arrange, F_out1 And F_out2In element by power failure economic loss expense from small to large in respective queue arrange；

By load is accessed after first excision load, first simple rear complicated, important load is first accessed and cut off afterwards switching operation Principle carry out, so first cut-out queue F successively_out1And F_out2In corresponding load, then access F_in1And F_in2In it is corresponding negative Lotus；

3rd step：For F_out1In the load that should cut off, take out a load element, find out side corresponding with load phase Adjacent F_BIn side, and switch sequence number between the two is put into disconnection switch queue S；

4th step：The 3rd step is repeated until F_out1It is sky；

5th step：For F_out2In load string, find out the F adjacent with the side of the load string_BIn side, and by they Between switch sequence number be put into disconnection switch queue S；

6th step：The 5th step is repeated until F_out2It is sky；

7th step：F_in1And F_in2In element in order and by the 3rd to the 6th step method, by switch to be closed Sequence number is put into closure switch queue T, while other peripheries for being in closure state of the element in addition to T breaker in middle are opened Sequence number is closed to be put into disconnection switch queue S；

The disconnection switch queue S and closure switch queue T based on the contact element can be so generated, if in switching manipulation On off state is at required state before the procedure, then maintained switch state is constant；

8th step：If X is not empty, the first step is returned.

Described contact element is the element of the energy load fault region load of normal operation.

Positive beneficial effect of the invention is as follows：

1st, the present invention uses the service restoration method based on CSP models, simple and be easy to software realization, using asynchronous Backtracking algorithm optimizing, while considering the significance level of load, is easy to dispatcher's fast and safely transfer load, makes service restoration Speed it is faster.

2nd, the present invention considers the significance level of load, and target is minimised as with the economic loss caused by having a power failure, while Consider the influence of sensitiveness Load on Electric Power Grid work.

3rd, the present invention is using the switching operation life based on contact element loading load method change before and after service restoration It is simple to operation into method, and the situation that feeder line overload or closed loop etc. are unsatisfactory for service restoration requirement will not occur.

Brief description of the drawings：

Fig. 1 is the particular flow sheet of service restoration after bus loss of pressure failure of the present invention；

Fig. 2 is switching operation product process figure of the present invention；

Fig. 3 is the test case in embodiments of the invention.

Specific embodiment：

(referring to Fig. 1~Fig. 3) is made further explanation and description to the present invention with reference to the accompanying drawings and examples：

Embodiment：A kind of bus loss of pressure failure service restoration and switching operation generation method, load restoration is reducing Loss of outage maximum turns to object function, and power distribution network reconfiguration result is presented in the form of contact element loading load method change, Switching operation is specifically included following several by being generated based on the change of contact element loading load method before and after service restoration Individual step：

A, the network parameter for reading distribution system：

Test case as shown in Figure 3, the line load electric current reflection for representing phase, sets up the number of representation system network parameter According to structure, i.e. the matrix D of the row of 12 row 8, i.e.,

Wherein, d_i1The sequence number on (i=1,2 ... N) description side；d_i2~d_i4The sequence number of the node that description connects with the side, T The side connects with three nodes when connecing；d_i5~d_i7Be with this while adjoining while sequence number, T connect it is corresponding abutted while with three, d_i8The payload on the side is represented, is represented with the electric current for representing phase；Idle element is -1 in D matrix；

B, bus loss of pressure judge and isolated fault that each contact element loads the mode of load after preservation failure cut-out：

If certain voltage of bus is dropped to by normal value is approximately 0, and the electric current of the N number of source point being connected with the bus or The voltage and current of the chopped-off head switch of the corresponding distribution line of person is dropped to by normal value and is approximately 0, then can determine whether bus loss of pressure, one As N desirable 2~5, bus-bar fault occurs, and system automatically cuts off the source point breaker isolated fault being connected with the bus, while guarantor Deposit the information of the load that other contact elements being connected with cut off feeder line are loaded；Assuming that bus 101 breaks down, breaker S1 disconnects, and preserves the sequence number on the corresponding side of load of contact element S2 and S3 institutes band, the mode of S2 loading loads for (8,7,6, 5), S3's is (12,10,11)；

C, distribution network load service restoration optimization is carried out, show that each contact element after recovering loads the mode of load：

Power distribution network constraint satisfaction problemx CSP models are built, CSP models are described as a triple P=(X, D, C).X is change Quantity set, is denoted here as S2 and S3；D is the cartesian product of the domain of definition of each element in X, D_iRepresent i-th contact element The mode collection of load is loaded, it is node that each way is all used to switch, and load is the load tree representation on side；C is constraint set, is supplied Electric recovery scheme must is fulfilled for constraining C, and distribution network load is recovered must to be fulfilled for following constraint：

(1) node voltage is in allowed band；

(2) contact element load is no more than rated value；

(3) radiation net mode operation；

(1) (2) are constrained in the domain of definition internal inspection of variable and is met, constraint (3) is equivalent to each load by a connection Network power elements, i.e., the load that any two contact elements are loaded does not have identical element, using matrix R as shown below_ijCome Represent the restriction relation between two contact elements：

Wherein, the mode that the mode of the loading load of contact element i has m kinds, the loading load of contact element j has n kinds, unit A is taken when in the pth kind loading load method of part i and the q kinds loading load method of element j without identical element_pqIt is 1, comprising phase Value is 0 during with element；

R_ijIn matrix element can not arbitrarily arrange, the mode of all loading loads in each contact element is first pressed into mesh Scalar functions are arranged from big to small, and are numbered in this order and then drawn constraint matrix；Consider that object function has a power failure for maximum reduction Economic loss, that is, the corresponding total interruption cost of load for being loaded is maximum, and formula is：

Wherein, N_iIt is the number of the load of contact element i loadings；k_bFor the corresponding unit loss of outage of b-th load takes With although some sensitive users unit interruption costs less, belong to sensitiveness load, power failure will also result in big shadow Ring, this seasonal k*k_bInstead of k_b, k takes 3~5；p_bIt is b-th size of load, is reflected with electric current；

In figure 3, feeder line capacity be 300A, while limit the feeder load of loading more than in the case of 200A, S2's Domain of definition is { (8,7,6,5,4), (8,7,5,4,3), (8,7,5,4), (8,7,6,5) }, the domain of definition of S3 for (12,10,9, 3,2), (12,10,9,3,4), (12,10,11,9), (12,10,9,3), (12,10,9), (12,10,11) }, according to target Function is arranged from big to small, by the constraint matrix between this generation S2 and S3 that puts in order：

After establishing constraint satisfaction problemx model, then need to carry out the search of optimal solution, algorithm is recalled using dynamic asynchronous Scan for, find out and not only meet constraints but also cause that the corresponding loss of outage of load of total contact element loading is maximum (i.e. The interruption cost of reduction is minimum) service restoration scheme, draw optimization after contact element load load mode；Such as R₂₃ The element of middle the first row first row meets the maximum load load method for requiring and all taking contact element, then the loading that S2 is used is born The mode of lotus is (8,7,6,5,4), and S3's is (12,10,9,3,2)；

D, the change for loading load method by contrasting each contact element before and after power distribution network service restoration draw service restoration The switching operation of process；

The step of specific service restoration switching operation is generated is as follows：

The first step：An element is taken out from variables set X, the load of contact element loading before service restoration is corresponding The sequence number on side is put into queue F_BIn, the sequence number on the corresponding side of load of contact element loading is put into queue F after service restoration_AIn, Contrast draw newly access the contact element institute on-load tree after service restoration with the feeder load cut off from load tree, will be newly The sequence number for accessing the corresponding side of feeder load of load tree is put into queue F_inIn, the feeder load correspondence that will be cut off from load tree The sequence number on side be put into queue F_outIn；For element S in X 2, F_BIt is (8,7,6,5), F_AIt is (8,7,6,5,4) to put sequence number 4 Enqueue F_inIn；

Second step：By queue F_inAnd F_outIn element by connected mode classify, if F_in(F_out) in element and the queue The element all without syntople, is then put into queue F by other either elements_in1(F_out1) in, other are had the element of syntople It is divided into different load strings and regards each load string as an entirety and is put into queue F_in2(F_out2) in, between different load string Without syntople；By F_in1And F_in2In element by power failure economic loss expense from big to small in respective queue arrange, F_out1 And F_out2In element by power failure economic loss expense from small to large in respective queue arrange；

By load is accessed after first excision load, first simple rear complicated, important load " is first accessed and broken afterwards switching operation Open " principle carry out, so first cut-out queue F successively_out1And F_out2In corresponding load, then access F_in1And F_in2Middle correspondence Load；

3rd step：For F_out1In the load that should cut off, take out a load element, find out side corresponding with load phase Adjacent F_BIn side, and switch sequence number between the two is put into disconnection switch queue S；

4th step：The 3rd step is repeated until F_out1It is sky；

5th step：For F_out2In load string, find out the F adjacent with the side of the load string_BIn side, and by they Between switch sequence number be put into disconnection switch queue S；

6th step：The 5th step is repeated until F_out2It is sky；

7th step：F_in1And F_in2In element in order and by the 3rd to the 6th step method method by switch to be closed Sequence number be put into closure switch queue T, while by the element in addition to T breaker in middle other be in closure state peripheries Switch is put into disconnection switch queue S；Generation queue S is (4), and T is (6)；

The disconnection switch queue S and closure switch queue T based on the contact element can be so generated, if in switching manipulation On off state is at required state before the procedure, then maintained switch state is constant；

8th step：If X is not empty, the first step is returned.

Continuation is operated to the element S 3 in variables set and X, and generation queue S is (2,12,4), and T is (11), because switch 4 exists Disconnected in the operation of S2, then kept 4 on off states constant in this operation, also will this it is to be broken switch sequence number delete Remove, obtain S for (2,12)；

Above-described embodiment is the present invention preferably implementation method, but embodiments of the present invention are not by above-described embodiment Limitation, other it is any without departing from Spirit Essence of the invention and the change, modification, replacement made under principle, combine, simplification, Equivalent substitute mode is should be, is included in protection scope of the present invention.

Claims (3)

1. a kind of bus loss of pressure failure service restoration and switching operation generation method, it is characterised in that：Load restoration is subtracting Few loss of outage maximum turns to object function, and power distribution network reconfiguration result is in the form of contact element loading load method change It is existing, switching operation being generated based on the change of contact element loading load method before and after service restoration, specifically include with Under several steps：

A, the network parameter for reading distribution system：

Using simplified model of distribution networks, will power distribution network regard a kind of figure as, the feeder switch along distribution line regards figure as Summit, the feeder line between two summits, in order to calculate simplicity, ignores three-phase imbalance factor, it is assumed that on power distribution network as the side of figure Voltage is equal everywhere, and the line load electric current for representing phase reflects, sets up the data structure of representation system network parameter, that is, define The matrix D description of the row of N rows 8, i.e.,：

$D=\left[\begin{array}{cccccccc}{d}_{11}& d_{12}& d_{13}& d_{14}& d_{15}& d_{16}& d_{17}& d_{18}\\ d_{21}& d_{22}& d_{23}& d_{24}& d_{25}& d_{26}& d_{27}& d_{28}\\ ...& ...& ...& ...& ...& ...& ...& ...\\ d_{N1}& d_{N2}& d_{N3}& d_{N4}& d_{N5}& d_{N6}& d_{N7}& d_{N8}\end{array}\right]$

Wherein, d_i1The sequence number on (i=1,2 ... N) description side；d_i2~d_i4The sequence number of the node that description connects with the side, when T connects The side connects with three nodes；d_i5~d_i7Be with this while adjoining while sequence number, T connect it is corresponding abutted while with three, d_i8Table Show the payload on the side, represented with the electric current for representing phase；Idle element is -1 in D matrix；

B, bus loss of pressure judge and isolated fault that each contact element loads the mode of load after preservation failure cut-out：

If certain voltage of bus is dropped to by normal value is approximately 0, and the N number of source point being connected with the bus electric current or phase The voltage and current for answering the chopped-off head of distribution line to switch is dropped to by normal value and is approximately 0, then can determine whether to be bus loss of pressure, typically N desirable 2~5；Bus breaks down, and system automatically cuts off the source point breaker isolated fault being connected with the bus, while preserving The information of the load that other contact elements being connected with cut off feeder line are loaded；

C, distribution network load service restoration optimization is carried out, show that each contact element after recovering loads the mode of load：

Power distribution network constraint satisfaction problemx CSP models are built, CSP models are described as a triple P=(X, D, C), and X is variable Collection, is denoted here as contact element collection；D is the cartesian product of the domain of definition of each element in X, D_iRepresent i-th contact unit Part loads the mode collection of load, and it is node that each way is all used to switch, and load is the load tree representation on side；C is constraint set, Service restoration scheme must is fulfilled for constraining C, and distribution network load is recovered must to be fulfilled for following constraint：

(1) node voltage is in allowed band；

(2) contact element load is no more than rated value；

(3) radiation net mode operation；

(1) (2) are constrained in the domain of definition internal inspection of variable and is met, constraint (3) is equivalent to each load by a contact unit Part is powered, i.e., the load that any two contact elements are loaded does not have identical element, using matrix R as shown below_ijTo represent Restriction relation between two contact elements：

$R_{ij}=\left[\begin{array}{cccc}{a}_{11}& a_{21}& \mathrm{...}& a_{1n}\\ a_{21}& a_{22}& \mathrm{...}& a_{2n}\\ .& .& & .\\ .& .& \mathrm{...}& .\\ .& .& & .\\ a_{m1}& a_{m2}& \mathrm{...}& a_{mn}\end{array}\right]$

Wherein, the mode that the mode of the loading load of contact element i has m kinds, the loading load of contact element j has n kinds, element i The loading of pth kind load method and element j q kinds loading load method in without identical element when take a_pqIt is 1, comprising identical unit Value is 0 when plain；

R_ijIn matrix element can not arbitrarily arrange, first by the mode of all loading loads in each contact element according to target letter Number is arranged from big to small, and is numbered in this order and then drawn constraint matrix；Consider that object function is economical for maximum reduction has a power failure Loss, that is, the corresponding total interruption cost of load for being loaded is maximum, and formula is：

$f=\max \underset{b=1}{\overset{N_i}{\Σ}}{k}_b{p}_b$

Wherein, N_iIt is the number of the load of contact element i loadings；k_bIt is the corresponding unit interruption cost of b-th load, one Although a little sensitive users unit interruption costs are less, belong to sensitiveness load, power failure will also result in big influence, at this moment Make k*k_bInstead of k_b, k takes 3~5；p_bIt is b-th size of load, is reflected with electric current；

After establishing constraint satisfaction problemx model, then need to carry out the search of optimal solution, carried out using dynamic asynchronous backtracking algorithm Search, finds out and not only meets constraints but also cause that the maximum power supply of the corresponding loss of outage of load of total contact element loading is extensive Compound case, show that the contact element after optimization loads the mode of load；

D, the change for loading load method by contrasting each contact element before and after power distribution network service restoration draw service restoration process Switching operation；

Switching operation should meet claimed below：

(1) operating process keeps the operation of network radiation mode；

(2) overload is not produced in operating process；

(3) the big load of loss of outage should be as early as possible reverted in operating process to power.

2. bus loss of pressure failure service restoration according to claim 1 and switching operation generation method, its feature exist In：In step " D ", the switching operation of the service restoration process, what it was generated comprises the following steps that：

The first step：A contact element is taken out from variables set X, the load of contact element loading before service restoration is corresponding The sequence number on side is put into queue F_BIn, the sequence number on the corresponding side of load of contact element loading is put into queue F after service restoration_AIn, Contrast F_BAnd F_A, the load tree of the contact element institute band and the feeder line cut off from the load tree are newly accessed after drawing service restoration Load, queue F is put into by the sequence number on the new corresponding side of feeder load for accessing load tree_inIn, the feedback that will be cut off from load tree The sequence number on the corresponding side of specific electric load is put into queue F_outIn；

Second step：By queue F_inAnd F_outIn element by connected mode classify, if F_in(F_out) in element and the queue other The element all without syntople, is then put into queue F by either element_in1(F_out1) in；Other elements for having syntople are divided into Different load strings, and regard each load string as an entirety and be put into queue F_in2(F_out2) in, without neighbour between different load string Connect relation；By F_in1And F_in2In element by power failure economic loss expense from big to small in respective queue arrange, F_out1And F_out2 In element by power failure economic loss expense from small to large in respective queue arrange；

By load is accessed after first excision load, first simple rear complicated, important load first accesses the original for cutting off afterwards to switching operation Then carry out, so first cutting off queue F successively_out1And F_out2In corresponding load, then access F_in1And F_in2In corresponding load；

3rd step：For F_out1In the load that should cut off, take out a load element, find out side corresponding with the load adjacent F_BIn side, and switch sequence number between the two is put into disconnection switch queue S；

4th step：The 3rd step is repeated until F_out1It is sky；

5th step：For F_out2In load string, find out the F adjacent with the side of the load string_BIn side, and by between them Switch sequence number be put into disconnection switch queue S；

6th step：The 5th step is repeated until F_out2It is sky；

7th step：F_in1And F_in2In element in order and by the 3rd to the 6th step method, by the sequence number of switch to be closed It is put into closure switch queue T, while other peripheries for being in closure state of the element in addition to T breaker in middle are switched into sequence Number it is put into disconnection switch queue S；

The disconnection switch queue S and closure switch queue T based on the contact element can be so generated, if being switched in switching manipulation State is at required state before the procedure, then maintained switch state is constant；

8th step：If X is not empty, the first step is returned.

3. bus loss of pressure failure service restoration according to claim 1 and switching operation generation method, its feature exist In：Described contact element is the element of the energy load fault region load of normal operation.