CN103427484A - Centralized control method of regional power grid spare power automatic switching devices - Google Patents
Centralized control method of regional power grid spare power automatic switching devices Download PDFInfo
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Abstract
The invention provides a centralized control method of regional power grid spare power automatic switching devices. According to the characteristics that regional power grids are designed in a closed-loop mode, and run in an open-loop mode, in terms of states of the spare power automatic switching devices, switch states, power supply point distribution, branch point distributing situations and power grid basic topology structural information, a topology identifying method is adopted to form a current flow matrix in the direction of currents, the matrix describes a real-time topology structure of a network, when an element in an expected accident set fails, a set of the power automatic switching devices which should operate is searched by means of the matrix, and centralized control is carried out on the power automatic switching devices. The centralized control method overcomes the defects that according to a traditional spare power automatic switching device, unnecessary motion delay of a next-level spare power automatic switching device can be caused, the superior and subordinate relationship of the spare power automatic switching devices is difficult to distinguish.
Description
Patent field
The invention belongs to area power grid fault recovery technology field and power system automation technology field, relate to the fault recovery of area power grid, is a kind of centralized area power grid prepared auto restart control method specifically.
Background technology
Electric power occupies critical role in national economy and people's lives, and fault outage brings heavy losses can to social production and people's lives, so it is extremely urgent to improve power supply reliability.China's area power grid and net, provincial power network are different, are closed loop design, radial operation.When certain electric component break down and meeting out of service cause non-fault zone, downstream to have a power failure, in order to improve power supply reliability, installed a large amount of automatic throw-in equipment of emergency power supplies in electrical network, the abbreviation prepared auto restart.When electrical network breaks down when bus is had a power failure, the action of a series of switches by meeting the prepared auto restart operation principle, make stand-by power supply be powered to the dead electricity bus.Due to the operation characteristic of area power grid and the complexity of structure, fault may cause many buses to have a power failure after occurring, and this just may cause a plurality of prepared auto restart actions, yet not all these prepared auto restart actions are all necessary.The prepared auto restart of action is more, also may cause further fault, so consider that the combinatorial problem between prepared auto restart is very necessary.The tradition prepared auto restart adopts electric pressure that be set operate time, to realize the combination of actions of prepared auto restart, but this easily causes traditional prepared auto restart action logic to be fixed, regular time cooperation meeting causes some unnecessary action delay to the next stage prepared auto restart between the superior and the subordinate.In addition, contain a large amount of T modes of connection in area power grid, sometimes be difficult to distinguish the relationship between superior and subordinate of prepared auto restart according to electric pressure.
Summary of the invention
The shortcoming that the present invention easily causes the unnecessary action delay of next stage prepared auto restart and is difficult to distinguish the relationship between superior and subordinate of prepared auto restart in order to overcome traditional prepared auto restart, proposed a kind of centralized area power grid prepared auto restart control method.The application is specifically by the following technical solutions:
A kind of centralized area power grid prepared auto restart control method is characterized in that described method comprises the steps:
(1) electric information of monitoring area power grid, bus and breakout are considered as to node processing, circuit, transformer and bus connection switch are considered as to branch road, set up net based structures matrix D, prepared auto restart state matrix B, on off state matrix K, contingency set matrix F, power supply point distribution matrix M and breakout distribution matrix T;
(2) generate trend according to the net based structures matrix of setting up, prepared auto restart state matrix, on off state matrix, power supply point distribution matrix and breakout distribution matrix and flow to Matrix C;
(3) if certain element that forecast accident is concentrated breaks down, revise the corresponding element in the contingency set matrix.
(4) draw the prepared auto restart set after certain concentrated element of forecast accident breaks down:
If certain element that forecast accident is concentrated breaks down, by trend, flow to the node situation that matrix judges these element two ends, node headed by the node that trend flows out, the node that trend flows into is tail node;
Area power grid is radial operation, and trend flows to load bus by power supply point, when certain element breaks down when out of service, and the downstream load node dead electricity of this element.Trend flow to matrix description trend flowed to the directed walk of load bus by power supply point, when certain element breaks down when out of service, to take the tail node of this element be start node, flows in trend all nodes of reading in matrix and be the dead electricity zone;
If the node that this dead electricity zone comprises does not contain breakout, in the prepared auto restart state matrix, search two side gussets the prepared auto restart of only occurs in this dead electricity zone, and the prepared auto restart that in the prepared auto restart that search is obtained, electric pressure is the highest is as the prepared auto restart set;
If breakout is contained in this dead electricity zone, region of search is divided into to two parts, final prepared auto restart set for this two parts zone search for respectively acquired results and.Node that breakout was connected is usingd respectively as start node in first, by each start node, reads respectively downstream node separately, i.e. power supply area separately, and each power supply area is searched for respectively to the prepared auto restart set drawn separately.Searching method to certain power supply area is, in the prepared auto restart state matrix, the prepared auto restart of only appears in search two side gussets in this power supply area, and the prepared auto restart that in the prepared auto restart that search is obtained, electric pressure is the highest is as the prepared auto restart set.Second portion is that the zone outside the contained zone of first is removed in the dead electricity zone, the searching method regional to this part is, in the prepared auto restart state matrix, the prepared auto restart of only appears in search two side gussets in this zone, and the prepared auto restart that in the prepared auto restart that search is obtained, electric pressure is the highest is as the prepared auto restart set;
(5) area power grid after the resulting prepared auto restart assembling operation of step (4) is carried out to trend calculating, judge whether to exist the circuit of electric current, voltage out-of-limit, if there is no the situation of circuit electric current, voltage out-of-limit, export the resulting prepared auto restart set of step (4), if have circuit to have the situation of electric current, voltage out-of-limit, export the resulting prepared auto restart set of step (4) and out-of-limit line information.
The invention has the beneficial effects as follows:
A kind of centralized area power grid prepared auto restart control method disclosed by the invention, characteristics for area power grid closed loop design, open loop operation, adopt a kind of method of topology identification to form to take the trend that trend is direction to flow to matrix, this matrix description the real-time topology structure of network, the prepared auto restart set that should move for search, carry out centralized control for prepared auto restart.Overcome traditional prepared auto restart and adopt electric pressure that be set operate time, to realize the combination of actions of prepared auto restart, cause traditional prepared auto restart action logic to be fixed, have between the superior and the subordinate regular time to coordinate, can cause so the unnecessary action delay of next stage prepared auto restart.And contain a large amount of T modes of connection in area power grid, sometimes be difficult to distinguish the shortcoming of the relationship between superior and subordinate of prepared auto restart according to electric pressure.
The accompanying drawing explanation
The flow chart that Fig. 1 is the centralized area power grid prepared auto restart control method of the present invention;
Fig. 2 is the area power grid winding diagram of normal operation.
Embodiment
Below with reference to accompanying drawing and example, the content of inventing is described further.
(1) electric information of monitoring area power grid, bus and breakout are considered as to node processing, circuit, transformer and bus connection switch are considered as to branch road, set up net based structures matrix D, prepared auto restart state matrix B, on off state matrix K, contingency set matrix F, power supply point distribution matrix M and breakout distribution matrix T;
Using bus and breakout as node, circuit, transformer and bus-tie circuit breaker are processed as branch road.The basic electric information that area power grid need to be set up is as follows:
(a) described net based structures matrix D is the matrix of N * N, what describe is the potential topological structure of area power grid, when generating net based structures matrix, even the branch switch between two nodes disconnects, also still be considered as existing a branch road and reflected in net based structures matrix D.Net based structures matrix is each branch road of area power grid to be used as to nonoriented edge process, if having branch road, a d between area power grid node i and node j
Ij=d
Ji=1, all the other elements are 0, and wherein, N is the node sum, d
IjFor the element of the capable j row of i in net based structures matrix D, d
JiElement for the capable i row of j in net based structures matrix D;
(b) prepared auto restart state matrix B is the matrix of B * 4, description be running status and the electric information of prepared auto restart, the number of behavior prepared auto restart, the node serial number that first two columns is the prepared auto restart both sides; The 3rd classifies the operating state of prepared auto restart as, if prepared auto restart in closure state, this element is 1, otherwise is 0; The 4th classifies the electric pressure of this prepared auto restart place bus as;
(c) matrix that described on off state matrix K is K * 3, description be the running status of switch, the number of behavior switch, the node serial number that first two columns is these switch both sides, the 3rd classifies on off state as, if switch in closure state, this element is 1, otherwise is 0;
(d) power supply point distribution matrix M is the matrix of M * 1, description be the distribution situation of power supply, the behavior node serial number, what power supply point distribution matrix M described is the distribution situation of area power grid power supply point, if regional node p is power supply point, m
p=1, otherwise m
p=0, m wherein
pFor the capable element of p in the power supply point distribution matrix; (e) breakout distribution matrix T is the matrix of T * 1, what describe is the distribution situation of branch node, the behavior node serial number, contain a large amount of T modes of connection in area power grid, each feeder line Branch Power Flow converges and shunts at the breakout place, what breakout distribution matrix T described is the distribution situation of area power grid breakout, if area power grid node q is breakout, t
q=1, otherwise t
q=0, t wherein
qFor the capable element of q in the breakout distribution matrix; (f) the contingency set matrix F is the matrix of F * 1, description be possible fault element, F is the number of forecast accident element, if element r fault, f
r=1, otherwise f
r=0, f wherein
rFor the capable element of r in the contingency set matrix.
(2) generate trend according to the net based structures matrix of setting up, prepared auto restart state matrix, on off state matrix, power supply point distribution matrix and breakout distribution matrix and flow to Matrix C;
In described centralized area power grid prepared auto restart control method, in described step (2), trend flow to matrix description trend flowed to the directed walk of load bus by power supply point, it is that basis draws by net basic matrix D that trend flows to Matrix C, be that the branch road of area power grid is used as to directed edge, the direction of directed edge determines by the Branch Power Flow direction, if having a branch road between node i, j, and direction of tide is to point to j, c by i
Ij=1, c
Ji=0.
The application preferably adopts following steps to show that trend flows to Matrix C:
(a) from off state matrix K and prepared auto restart state matrix B, find in the switch of off-state and the prepared auto restart of off-state, find area power grid node i, the j of the prepared auto restart both sides of the switch of off-state and off-state, j element and the capable i element of j that the i in net based structures matrix D is capable are set to 0;
(b) revise the breakout distribution matrix after the area power grid running status changes, if a certain switch disconnects, cause corresponding breakout to be changed to ordinary node, in the breakout distribution matrix, corresponding element is set to 0;
(c) obtain the node serial number of power supply from power supply point distribution matrix M, take power supply point as starting point start the search, in net based structures matrix D, find the i at power supply node i place capable, search node j in i is capable, in net based structures matrix D, retain the j element that i is capable constant, by j, capable i element sets to 0 simultaneously, and then continues search by the j node by identical method, until search endpoint node, this row is 0 node entirely;
(d) if meet termination condition, searched for, the output trend flows to the Matrix C result; Continue search otherwise go to step (c), wherein, described termination condition is that trend flows to matrix and occurs that element is that the number of 0 row is identical with actual electric network endpoint node number entirely.
(3) if certain element that forecast accident is concentrated breaks down, revise the corresponding element in the contingency set matrix.
(4) draw the prepared auto restart set after certain concentrated element of forecast accident breaks down:
If certain element that forecast accident is concentrated breaks down, by trend, flow to the node situation that matrix judges these element two ends, node headed by the node that trend flows out, the node that trend flows into is tail node;
Area power grid is radial operation, and trend flows to load bus by power supply point, when certain element breaks down when out of service, and the downstream load node dead electricity of this element.Trend flow to matrix description trend flowed to the directed walk of load bus by power supply point, when certain element breaks down when out of service, to take the tail node of this element be start node, flows in trend all nodes of reading in matrix and be the dead electricity zone;
If the node that this dead electricity zone comprises does not contain breakout, in the prepared auto restart state matrix, search two side gussets the prepared auto restart of only occurs in this dead electricity zone, and the prepared auto restart that in the prepared auto restart that search is obtained, electric pressure is the highest is as the prepared auto restart set;
If breakout is contained in this dead electricity zone, region of search is divided into to two parts, final prepared auto restart set for this two parts zone search for respectively acquired results and.Node that breakout was connected is usingd respectively as start node in first, by each start node, reads respectively downstream node separately, i.e. power supply area separately, and each power supply area is searched for respectively to the prepared auto restart set drawn separately.Searching method to certain power supply area is, in the prepared auto restart state matrix, the prepared auto restart of only appears in search two side gussets in this power supply area, and the prepared auto restart that in the prepared auto restart that search is obtained, electric pressure is the highest is as the prepared auto restart set.Second portion is that the zone outside the contained zone of first is removed in the dead electricity zone, the searching method regional to this part is, in the prepared auto restart state matrix, the prepared auto restart of only appears in search two side gussets in this zone, and the prepared auto restart that in the prepared auto restart that search is obtained, electric pressure is the highest is as the prepared auto restart set;
(5) area power grid after the resulting prepared auto restart assembling operation of step (4) is carried out to trend calculating, judge whether to exist the circuit of electric current, voltage out-of-limit, if there is no the situation of circuit electric current, voltage out-of-limit, export the resulting prepared auto restart set of step (4), if have circuit to have the situation of electric current, voltage out-of-limit, export the resulting prepared auto restart set of step (4) and out-of-limit line information.
The area power grid of below take as shown in Figure 2 is embodiment, further introduces the application's technical scheme, and this electrical network comprises 1 220kV transformer station, 5 110kV transformer stations, 2 three-winding transformers, 10 two winding transformers and 11 circuits.This system has 9 places prepared auto restart has been installed, and marks in Fig. 2;
Although area power grid generally contains numerous nodes, the node in electrical network also only is connected with limited several nodes, so net based structures matrix D is a sparse matrix.For convenience of description with reduce input variable, net based structures matrix D is entered as to the matrix of N * d, N is node serial number, the maximum that d is node degree in this distribution network, as shown in Figure 2, the maximum of node degree is 5, as node 2,3 etc.Element in net based structures matrix D is the node serial number that is connected with this row node, the not enough maximum node number of degrees of connected node with 0 polishing.
The application is usingd the area power grid shown in accompanying drawing 2 as embodiment, and technical scheme of the present invention is described in detail, and the present invention includes following steps:
(1) the basic electric information of input area power grid, set up net based structures matrix D=[2 3 11 23; 14 20 24; 1 45 0; 2360; 3600; 4500; 89 23 0; 7 10 24 0; 7 10 00; 8900; 1 12 13 0; 11 1,419 0; 11 14 00; 12 13 00; 16 17 23 0; 2 15 18 0; 15 18 00; 16 17 00; 12 20 21 0; 219 22 0; 19 22 00; 20 21 00; 17 15 0; 28 16 0]; Prepared auto restart state matrix B=[3 40 110; 56 010; 780 110; 9 10 0 10; 13 14 0 10; 15 16 0 110; 17 18 0 10; 12 19 0 110; 21 22 0 110]; On off state matrix K=[1 11 1; 1 23 1; 131; 241; 2 24 1; 2 20 1; 24 81; 2 16 1; 7 23 1; 2315 1; 12 19 1]; The element that the contingency set matrix F comprises is circuit 1 ... 11 and transformer 12 ... 21, number as shown in Figure 2, and order is set up contingency set matrix F=[0 000000000000000000 00] according to this; Power supply point distribution matrix M=[1 1000000000000000000000 0] and breakout distribution matrix T=[0 0000000000000000000001 1];
(2) area power grid is traveled through, according to the direction of tide generation trend of actual electric network, flowed to Matrix C=[0 3 11 23; 04 20 24; 0050; 0060; 0000; 0000; 0900; 0 10 00; 0000; 0000; 0 12 130; 0 14 00; 0000; 0000; 0 17 00; 00 18 0; 0000; 0000; 00 21 0; 0 19 22 0; 00 00; 0000; 07 15 0; 08 16 0];
(3) certain element that forecast accident is concentrated breaks down, and revises the contingency set matrix.The example 1 circuit 3 contingency set matrix modifications that breaks down is F=[0 0100000000000000000 0]; Switch opens between node 1 and 3, corresponding on off state matrix is changed to K=[1 11 1; 1 23 1; 130; 241; 2 241; 2 20 1; 24 81; 2 16 1; 7 23 1; 23 15 1; 12 19 1];
The example 2 circuits 2 contingency set matrix modifications that breaks down is F=[0 1000000000000 00 0000 0]; Switch opens between node 1 and 23,7 and 23,23 and 15, corresponding on off state matrix is changed to K=[1 11 1; 1 23 0; 131; 241; 2 24 1; 2 20 1; 24 81; 2 16 1; 723 0; 23 15 0; 1219 1];
(4) search draws the prepared auto restart set;
In example 1, the trend of fault element 3 flows to node 3 by node 1, so node 3 is tail node, from node 3, starts to flow to matrix and read dead electricity zone [35] in trend.Breakout is not contained in this zone, and node 3 and 5 is corresponding prepared auto restart equipment 1 and 2 respectively, and the electric pressure of prepared auto restart equipment 1 is the highest, the prepared auto restart of prepared auto restart equipment 1 for moving.Draw prepared auto restart set [1]
In example 2, the trend of fault element 2 flows to node 23 by node 1, so node 23 is tail node, from node 23, starts to flow to matrix and read dead electricity zone [23 79 15 17] in trend.Breakout is contained in this zone, and the power supply area that node 7 that breakout connects is connected with 15, i.e. [7 9] and [15 17] are searched for respectively by first.Node 7 and 9 is corresponding prepared auto restart equipment 3 and 4 respectively, and the electric pressure of prepared auto restart equipment 3 is the highest, and prepared auto restart equipment 3 is the prepared auto restart set; Node 15 and 17 is corresponding prepared auto restart equipment 6 and 7 respectively, and the electric pressure of prepared auto restart equipment 6 is the highest, and prepared auto restart equipment 6 is the prepared auto restart set.Second portion is [23], and this zone does not have corresponding prepared auto restart, so there is no the prepared auto restart set.And then results added is drawn to prepared auto restart set [3 6];
(5) area power grid after the resulting prepared auto restart assembling operation of 1 pair of step of example (4) carries out trend calculating, and result of calculation does not have the situation of circuit electric current, voltage out-of-limit, exports prepared auto restart set [1].
Area power grid after the resulting prepared auto restart assembling operation of 2 pairs of steps of example (4) carries out trend calculating, and result of calculation does not have the situation of circuit electric current, voltage out-of-limit, exports prepared auto restart set [3 6].
Finally should be noted that: in conjunction with above-described embodiment, only illustrate that technical scheme of the present invention is not intended to limit.It will be understood by those skilled in the art that: those skilled in the art can modify or be equal to replacement the specific embodiment of the present invention, but among the claim protection range that these modifications or change are all awaited the reply in application.
Claims (5)
1. a centralized area power grid prepared auto restart control method, is characterized in that, described method comprises the steps:
(1) electric information of monitoring area power grid, bus and breakout are considered as to node processing, circuit, transformer and bus connection switch are considered as to branch road, set up net based structures matrix D, prepared auto restart state matrix B, on off state matrix K, contingency set matrix F, power supply point distribution matrix M and breakout distribution matrix T;
(2) generate trend according to the net based structures matrix of setting up, prepared auto restart state matrix, on off state matrix, power supply point distribution matrix and breakout distribution matrix and flow to Matrix C;
(3) if certain element that forecast accident is concentrated breaks down, revise the corresponding element in the contingency set matrix;
(4) draw the prepared auto restart set after certain concentrated element of forecast accident breaks down;
(5) area power grid after the resulting prepared auto restart assembling operation of step (4) is carried out to trend calculating, judge whether to exist the circuit of electric current, voltage out-of-limit, if there is no the situation of circuit electric current, voltage out-of-limit, export the resulting prepared auto restart set of step (4), if have circuit to have the situation of electric current, voltage out-of-limit, export the resulting prepared auto restart set of step (4) and out-of-limit line information.
2. centralized area power grid prepared auto restart control method as claimed in claim 1 is characterized in that:
In step (4), if certain element that forecast accident is concentrated breaks down, by trend, flow to the node situation that matrix judges these element two ends, node headed by the node that trend flows out, the node that trend flows into is tail node;
Area power grid moves radially, trend flow to matrix description trend flowed to the directed walk of load bus by power supply point, when certain element breaks down when out of service, to take the tail node of this element be start node, flows in trend all nodes of reading in matrix and be the dead electricity zone;
If the node that this dead electricity zone comprises does not contain breakout, in the prepared auto restart state matrix, search two side gussets the prepared auto restart of only occurs in this dead electricity zone, and the prepared auto restart that in the prepared auto restart that search is obtained, electric pressure is the highest is as the prepared auto restart set;
If breakout is contained in this dead electricity zone, region of search is divided into to two parts, final prepared auto restart set for this two parts zone search for respectively acquired results and, wherein, node that breakout was connected is usingd respectively as start node in first, read respectively downstream node separately by each start node, i.e. power supply area separately, and each power supply area is searched for respectively to the prepared auto restart set drawn separately, in the prepared auto restart state matrix, the prepared auto restart of only appears in search two side gussets in this power supply area, the prepared auto restart that in the prepared auto restart that search is obtained, electric pressure is the highest is as the prepared auto restart set.
Second portion is that the zone outside the contained zone of first is removed in the dead electricity zone, the searching method regional to this part is, in the prepared auto restart state matrix, the prepared auto restart of only appears in search two side gussets in this zone, and the prepared auto restart that in the prepared auto restart that search is obtained, electric pressure is the highest is as the prepared auto restart set.
3. centralized area power grid prepared auto restart control method as claimed in claim 1 or 2 is characterized in that:
(a) described net based structures matrix D is the matrix of N * N, what describe is the potential topological structure of area power grid, when generating net based structures matrix, even the branch switch between two nodes disconnects, also still be considered as existing a branch road and reflected in net based structures matrix D.Net based structures matrix is each branch road of area power grid to be used as to nonoriented edge process, if having branch road, a d between area power grid node i and node j
Ij=d
Ji=1, all the other elements are 0, and wherein, N is the node sum, d
IjFor the element of the capable j row of i in net based structures matrix D, d
JiElement for the capable i row of j in net based structures matrix D;
(b) prepared auto restart state matrix B is the matrix of B * 4, description be running status and the electric information of prepared auto restart, the number of behavior prepared auto restart, the node serial number that first two columns is the prepared auto restart both sides; The 3rd classifies the operating state of prepared auto restart as, if prepared auto restart in closure state, this element is 1, otherwise is 0; The 4th classifies the electric pressure of this prepared auto restart place bus as;
(c) matrix that described on off state matrix K is K * 3, description be the running status of switch, the number of behavior switch, the node serial number that first two columns is these switch both sides, the 3rd classifies on off state as, if switch in closure state, this element is 1, otherwise is 0;
(d) power supply point distribution matrix M is the matrix of M * 1, description be the distribution situation of power supply, the behavior node serial number, what power supply point distribution matrix M described is the distribution situation of area power grid power supply point, if regional node p is power supply point, m
p=1, otherwise m
p=0, m wherein
pFor the capable element of p in the power supply point distribution matrix;
(e) breakout distribution matrix T is the matrix of T * 1, what describe is the distribution situation of branch node, the behavior node serial number, contain a large amount of T modes of connection in area power grid, each feeder line Branch Power Flow converges and shunts at the breakout place, what breakout distribution matrix T described is the distribution situation of area power grid breakout, if area power grid node q is breakout, t
q=1, otherwise t
q=0, t wherein
qFor the capable element of q in the breakout distribution matrix;
(f) the contingency set matrix F is the matrix of F * 1, description be possible fault element, F is the number of forecast accident element, if element r fault, f
r=1, otherwise f
r=0, f wherein
rFor the capable element of r in the contingency set matrix.
4. the described centralized area power grid prepared auto restart control method of claim as arbitrary as claim 1-3, it is characterized in that: in described step (2), trend flow to matrix description trend flowed to the directed walk of load bus by power supply point, it is that basis draws by net basic matrix D that trend flows to Matrix C, be that the branch road of area power grid is used as to directed edge, the direction of directed edge determines by the Branch Power Flow direction, if having a branch road between node i, j, and direction of tide is to point to j, c by i
Ij=1, c
Ji=0.
5. centralized area power grid prepared auto restart control method as claimed in claim 3 is characterized in that:
Preferably adopt following steps to show that trend flows to Matrix C:
(a) from off state matrix K and prepared auto restart state matrix B, find in the switch of off-state and the prepared auto restart of off-state, find area power grid node i, the j of the prepared auto restart both sides of the switch of off-state and off-state, j element and the capable i element of j that the i in net based structures matrix D is capable are set to 0;
(b) revise the breakout distribution matrix after the area power grid running status changes, if a certain switch disconnects, cause corresponding breakout to be changed to ordinary node, in the breakout distribution matrix, corresponding element is set to 0;
(c) obtain the node serial number of power supply from power supply point distribution matrix M, take power supply point as starting point start the search, in net based structures matrix D, find the i at power supply node i place capable, search node j in i is capable, in net based structures matrix D, retain the j element that i is capable constant, by j, capable i element sets to 0 simultaneously, and then continues search by the j node by identical method, until search endpoint node, this row is 0 node entirely;
(d) if meet termination condition, searched for, the output trend flows to the Matrix C result; Continue search otherwise go to step (c), wherein, described termination condition is that trend flows to matrix and occurs that element is that the number of 0 row is identical with actual electric network endpoint node number entirely.
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| CN103944162A (en) * | 2014-04-15 | 2014-07-23 | 国网辽宁省电力有限公司沈阳供电公司 | Power distribution network fault recovery method based on real-time contingency sets |
| CN107257163A (en) * | 2017-08-02 | 2017-10-17 | 国网上海市电力公司 | A kind of standby determination method for throwing malfunctioning node of network |
| CN107526003A (en) * | 2017-07-20 | 2017-12-29 | 北京天泰怡和科技有限公司 | Intelligent distribution network automatic analysis system |
| CN108963959A (en) * | 2018-07-13 | 2018-12-07 | 河南汇纳科技有限公司 | Centralized area power grid prepared auto restart control system and control method based on LoRa |
| CN110955967A (en) * | 2019-11-26 | 2020-04-03 | 广东电网有限责任公司 | Modeling method and system for bus tie spare power automatic switching in BPA |
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