CN103427484B - A kind of centralized area power grid prepared auto restart control method - Google Patents
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Abstract
A kind of centralized area power grid prepared auto restart control method, for the feature of area power grid closed loop design, open loop operation, according to prepared auto restart state, on off state, power supply point distribution, breakout distribution situation and electrical network Basic Topological information, adopting a kind of topology to know, method for distinguishing formed is that the trend in direction flows to matrix with trend, this matrix description real-time topology structure of network, when forecast accident concentrates certain element failure, utilize the search of this matrix to answer the prepared auto restart set of action, centralized control is carried out to prepared auto restart.Instant invention overcomes traditional prepared auto restart can cause the unnecessary action delay of next stage prepared auto restart and be difficult to the shortcoming of the relationship between superior and subordinate distinguishing prepared auto restart.
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, specifically a kind of centralized area power grid prepared auto restart control method.
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, in closed loop design, and radial operation.When certain electric component breaks down and meeting out of service causes non-faulting region, downstream to have a power failure, in order to improve power supply reliability, in electrical network, installing a large amount of automatic throw-in equipment of emergency power supply, being called for short prepared auto restart.When grid collapses makes bus have a power failure, by meeting the action of a series of switches of prepared auto restart operation principle, stand-by power supply is powered to 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, this just may cause multiple prepared auto restart action, but 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.Tradition prepared auto restart adopts electric pressure to arrange 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, the action delay that cause some unnecessary to next stage prepared auto restart is understood in regular time cooperation between the superior and the subordinate.In addition, containing a large amount of T mode of connection in area power grid, be sometimes difficult to according to electric pressure the relationship between superior and subordinate distinguishing prepared auto restart.
Summary of the invention
The present invention easily causes the unnecessary action delay of next stage prepared auto restart to overcome traditional prepared auto restart and is difficult to the shortcoming of the relationship between superior and subordinate distinguishing prepared auto restart, proposes a kind of centralized area power grid prepared auto restart control method.The application is concrete by the following technical solutions:
A centralized area power grid prepared auto restart control method, it is characterized in that, described method comprises the steps:
(1) electric information of area power grid is monitored, bus and breakout are considered as node processing, circuit, transformer and bus connection switch are considered as 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 set 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 failure of concentrating of forecast accident, then the corresponding element in contingency set matrix is revised.
(4) the prepared auto restart set after certain element failure that forecast accident is concentrated is drawn:
If certain element failure that forecast accident is concentrated, then flow to by trend 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 failure is out of service, and the downstream load node dead electricity of this element.Trend flows to matrix description trend is flowed to load bus directed walk by power supply point, when certain element failure is out of service with the tail node of this element for start node, flow in trend all nodes read in matrix and be dead electricity region;
If the node that this dead electricity region comprises is not containing breakout, in prepared auto restart state matrix, search for the prepared auto restart that two side gussets only occur in this dead electricity region, the prepared auto restart that in the prepared auto restart obtain search, electric pressure is the highest is as prepared auto restart set;
If breakout is contained in this dead electricity region, then region of search is divided into two parts, final prepared auto restart set be this two parts region search for respectively acquired results and.The node that Part I connects using breakout, as start node, reads respective downstream node by each start node, namely respective power supply area respectively, and searches for respectively each power supply area and draw respective prepared auto restart set.That in prepared auto restart state matrix, search for the prepared auto restart that two side gussets only occur in this power supply area, the prepared auto restart that in the prepared auto restart obtain search, electric pressure is the highest is as prepared auto restart set to the searching method of certain power supply area.Part II is the region outside region contained by dead electricity region removing Part I, to the searching method in this part region be, in prepared auto restart state matrix, search for the prepared auto restart that two side gussets only occur in this region, the prepared auto restart that in the prepared auto restart obtain search, electric pressure is the highest is as prepared auto restart set;
(5) area power grid after the prepared auto restart assembling operation obtained step (4) carries out Load flow calculation, judge whether the circuit that there is electric current, voltage out-of-limit, if there is no the situation of circuit electric current, voltage out-of-limit, then export the prepared auto restart set that step (4) obtains, if there is circuit to there is the situation of electric current, voltage out-of-limit, then export prepared auto restart set and out-of-limit line information that step (4) obtains.
The invention has the beneficial effects as follows:
A kind of centralized area power grid prepared auto restart control method disclosed by the invention, for the feature of area power grid closed loop design, open loop operation, adopting a kind of topology to know, method for distinguishing formed is that the trend in direction flows to matrix with trend, this matrix description real-time topology structure of network, for searching for the prepared auto restart set of answering action, centralized control is carried out for prepared auto restart.Overcoming traditional prepared auto restart adopts electric pressure to arrange operate time, to realize the combination of actions of prepared auto restart, causes traditional prepared auto restart action logic to be fixed, has regular time to coordinate between the superior and the subordinate, can cause the action delay that next stage prepared auto restart is unnecessary like this.And containing a large amount of T mode of connection in area power grid, be sometimes difficult to the shortcoming of the relationship between superior and subordinate distinguishing prepared auto restart according to electric pressure.
Accompanying drawing explanation
Fig. 1 is the flow chart of the centralized area power grid prepared auto restart control method of the present invention;
Fig. 2 is the normal area power grid winding diagram run.
Embodiment
Below with reference to accompanying drawing and example, the content to invention is described further.
The attached flow chart that Figure 1 shows that the area power grid prepared auto restart control method that the present invention is centralized, a kind of centralized area power grid prepared auto restart control method, it is characterized in that, described method comprises the steps:
(1) electric information of area power grid is monitored, bus and breakout are considered as node processing, circuit, transformer and bus connection switch are considered as 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, using circuit, transformer and bus-tie circuit breaker as branch road process.Then area power grid needs the basic electric information of foundation 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, namely, when generating net based structures matrix, even if the branch switch between two nodes disconnects, being also still considered as existence branch road and being reflected in net based structures matrix D.Net based structures matrix is that each branch road of area power grid is used as nonoriented edge process, if there is branch road, then 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 node total number, d
ijfor the element of the i-th row jth row in net based structures matrix D, d
jifor the element that jth row i-th in net based structures matrix D arranges;
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, first two columns is the node serial number of prepared auto restart both sides; 3rd operating state being classified as prepared auto restart, if prepared auto restart is in closure state, then this element is 1, otherwise is 0; 4th electric pressure being classified as this prepared auto restart place bus;
C () described on off state matrix K is the matrix of K × 3, description be the running status of switch, the number of behavior switch, first two columns is the node serial number of these switch both sides, and the 3rd is classified as on off state, if switch is in closure state, then 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, behavior node serial number, the distribution situation of what power supply point distribution matrix M described is area power grid power supply point, if regional node p is power supply point, then m
p=1, otherwise m
p=0, wherein m
pfor the element that p in power supply point distribution matrix is capable; E () breakout distribution matrix T is the matrix of T × 1, what describe is the distribution situation of branch node, behavior node serial number, containing a large amount of T modes of connection in area power grid, each feeder line Branch Power Flow converges at breakout place and shunts, what breakout distribution matrix T described is the distribution situation of area power grid breakout, if area power grid node q is breakout, then t
q=1, otherwise t
q=0, wherein t
qfor the element that q in breakout distribution matrix is capable; F () 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, then f
r=1, otherwise f
r=0, wherein f
rfor the element that r in contingency set matrix is capable.
(2) generate trend according to the net based structures matrix set 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 flows to matrix description trend is flowed to load bus directed walk by power supply point, trend flows to Matrix C and draws by based on net basic matrix D, be that the branch road of area power grid is used as directed edge, the direction of directed edge is determined by Branch Power Flow direction, if there is a branch road between node i, j, and direction of tide points to j by i, then c
ij=1, c
ji=0.
The application preferably adopts following steps to show that trend flows to Matrix C:
A () is found and is in the switch of off-state and the prepared auto restart of off-state from off state matrix K and prepared auto restart state matrix B, find area power grid node i, the j of the switch of off-state and the prepared auto restart both sides of off-state, the j element of the i-th row in net based structures matrix D and the i element of jth row are set to 0;
B () revises the breakout distribution matrix after the change of area power grid running status, if a certain switch disconnects, cause corresponding breakout to be changed to ordinary node, then set to 0 by corresponding element in breakout distribution matrix;
C () obtains the node serial number of power supply from power supply point distribution matrix M, be that starting point starts search with power supply point, i-th row at power supply node i place is found in net based structures matrix D, node j is searched in the i-th row, the j element then retaining the i-th row in net based structures matrix D is constant, is set to 0 by the i element of jth row simultaneously, and then continues search by the identical method of j node, until search endpoint node, namely this row is the node of 0 entirely;
If d () meets termination condition, then search for, exported trend and flow to Matrix C result; Otherwise go to step (c) and continue search, wherein, described termination condition is that trend flows to matrix and occurs that element is that the number of the row of 0 is identical with actual electric network endpoint node number entirely.
(3) if certain element failure of concentrating of forecast accident, then the corresponding element in contingency set matrix is revised.
(4) the prepared auto restart set after certain element failure that forecast accident is concentrated is drawn:
If certain element failure that forecast accident is concentrated, then flow to by trend 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 failure is out of service, and the downstream load node dead electricity of this element.Trend flows to matrix description trend is flowed to load bus directed walk by power supply point, when certain element failure is out of service with the tail node of this element for start node, flow in trend all nodes read in matrix and be dead electricity region;
If the node that this dead electricity region comprises is not containing breakout, in prepared auto restart state matrix, search for the prepared auto restart that two side gussets only occur in this dead electricity region, the prepared auto restart that in the prepared auto restart obtain search, electric pressure is the highest is as prepared auto restart set;
If breakout is contained in this dead electricity region, then region of search is divided into two parts, final prepared auto restart set be this two parts region search for respectively acquired results and.The node that Part I connects using breakout, as start node, reads respective downstream node by each start node, namely respective power supply area respectively, and searches for respectively each power supply area and draw respective prepared auto restart set.That in prepared auto restart state matrix, search for the prepared auto restart that two side gussets only occur in this power supply area, the prepared auto restart that in the prepared auto restart obtain search, electric pressure is the highest is as prepared auto restart set to the searching method of certain power supply area.Part II is the region outside region contained by dead electricity region removing Part I, to the searching method in this part region be, in prepared auto restart state matrix, search for the prepared auto restart that two side gussets only occur in this region, the prepared auto restart that in the prepared auto restart obtain search, electric pressure is the highest is as prepared auto restart set;
(5) area power grid after the prepared auto restart assembling operation obtained step (4) carries out Load flow calculation, judge whether the circuit that there is electric current, voltage out-of-limit, if there is no the situation of circuit electric current, voltage out-of-limit, then export the prepared auto restart set that step (4) obtains, if there is circuit to there is the situation of electric current, voltage out-of-limit, then export prepared auto restart set and out-of-limit line information that step (4) obtains.
Below with area power grid as shown in Figure 2 for embodiment, introduce the technical scheme of the application further, 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 and has installed prepared auto restart, and marks in fig. 2;
Although area power grid is generally containing numerous node, the node in electrical network is also only connected with limited several node, and therefore net based structures matrix D is a sparse matrix.For convenience of description with minimizing input variable, net based structures matrix D is entered as the matrix of N × d, N is node serial number, and d is the maximum of this distribution network interior joint degree, and 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 be connected with this row node, connected node the is not enough maximum node number of degrees with 0 polishing.
The application, using the area power grid shown in accompanying drawing 2 as embodiment, is described in detail technical scheme of the present invention, the present invention includes following steps:
(1) input the basic electric information of area power grid, set up net based structures matrix D=[231123; 142024; 1450; 2360; 3600; 4500; 89230; 710240; 71000; 8900; 112130; 1114190; 111400; 121300; 1617230; 215180; 151800; 161700; 1220210; 219220; 192200; 202100; 17150; 28160]; Prepared auto restart state matrix B=[340110; 56010; 780110; 910010; 1314010; 15160110; 1718010; 12190110; 21220110]; On off state matrix K=[1111; 1231; 131; 241; 2241; 2201; 2481; 2161; 7231; 23151; 12191]; The element that contingency set matrix F comprises is circuit 1 ... 11 and transformer 12 ... 21, numbering as shown in Figure 2, and sequentially sets up contingency set matrix F=[000000000000000000000] according to this; Power supply point distribution matrix M=[110000000000000000000000] and breakout distribution matrix T=[000000000000000000000011];
(2) area power grid is traveled through, generate trend according to the direction of tide of actual electric network and flow to Matrix C=[031123; 042024; 0050; 0060; 0000; 0000; 0900; 01000; 0000; 0000; 012130; 01400; 0000; 0000; 01700; 00180; 0000; 0000; 00210; 019220; 0000; 0000; 07150; 08160];
(3) certain element failure that forecast accident is concentrated, then revise contingency set matrix.Example 1 circuit 3 breaks down, and contingency set matrix modifications is F=[001000000000000000000]; Switch opens between node 1 and 3, corresponding on off state matrix is changed to K=[1111; 1231; 130; 241; 2241; 2201; 2481; 2161; 7231; 23151; 12191];
Example 2 circuit 2 breaks down, and contingency set matrix modifications is F=[010000000000000000000]; Node 1 and 23,7 and 23, switch opens between 23 and 15, corresponding on off state matrix is changed to K=[1111; 1230; 131; 241; 2241; 2201; 2481; 2161; 7230; 23150; 12191];
(4) search draws 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, namely flows in matrix in trend from node 3 and reads dead electricity region [35].This region is not containing breakout, 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, and prepared auto restart equipment 1 is for answering the prepared auto restart of action.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, namely flows in matrix in trend from node 23 and reads dead electricity region [23791517].Breakout is contained in this region, and Part I searches for the power supply area that node 7 that breakout connects is connected with 15 respectively, i.e. [79] and [1517].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 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 prepared auto restart set.Part II is [23], the prepared auto restart that this region is not corresponding, so do not have prepared auto restart set.And then results added is drawn prepared auto restart set [36];
(5) area power grid after the prepared auto restart assembling operation that obtains of example 1 pair of step (4) carries out Load flow calculation, and result of calculation does not have the situation of circuit electric current, voltage out-of-limit, then export prepared auto restart set [1].
Area power grid after the prepared auto restart assembling operation that example 2 pairs of steps (4) obtain carries out Load flow calculation, and result of calculation does not have the situation of circuit electric current, voltage out-of-limit, then export prepared auto restart set [36].
Finally should be noted that: only illustrate that technical scheme of the present invention is not intended to limit in conjunction with above-described embodiment.It will be understood by those skilled in the art that: those skilled in the art can modify to the specific embodiment of the present invention or equivalent replacement, but these amendments or change are all being applied among the claims awaited the reply.
Claims (5)
1. a centralized area power grid prepared auto restart control method, it is characterized in that, described method comprises the steps:
(1) electric information of area power grid is monitored, bus and breakout are considered as node processing, circuit, transformer and bus connection switch are considered as 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 D set up, prepared auto restart state matrix B, on off state matrix K, power supply point distribution matrix M and breakout distribution matrix T and flow to Matrix C;
(3) if certain element failure of concentrating of forecast accident, then the corresponding element in contingency set matrix F is revised;
(4) the prepared auto restart set after certain element failure that forecast accident is concentrated is drawn;
(5) area power grid after the prepared auto restart assembling operation obtained step (4) carries out Load flow calculation, judge whether the circuit that there is electric current, voltage out-of-limit, if there is no the situation of circuit electric current, voltage out-of-limit, then export the prepared auto restart set that step (4) obtains, if there is circuit to there is the situation of electric current, voltage out-of-limit, then export prepared auto restart set and out-of-limit line information that step (4) obtains.
2. area power grid prepared auto restart control method centralized as claimed in claim 1, is characterized in that:
In step (4), if certain element failure that forecast accident is concentrated, then flow to by trend the node situation that Matrix C 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 runs radially, trend flows to Matrix C and describes trend is flowed to load bus directed walk by power supply point, when certain element failure is out of service with the tail node of this element for start node, flow in trend all nodes read in Matrix C and be dead electricity region;
If the node that this dead electricity region comprises is not containing breakout, in prepared auto restart state matrix B, search for the prepared auto restart that two side gussets only occur in this dead electricity region, the prepared auto restart that in the prepared auto restart obtain search, electric pressure is the highest is as prepared auto restart set;
If breakout is contained in this dead electricity region, then region of search is divided into two parts, final prepared auto restart set be this two parts region search for respectively acquired results and, wherein, the node that Part I connects using breakout is as start node, respective downstream node is read respectively by each start node, namely respective power supply area, and each power supply area is searched for respectively draw respective prepared auto restart set, namely in prepared auto restart state matrix B, search for the prepared auto restart that two side gussets only occur in this power supply area, the prepared auto restart that in the prepared auto restart obtain search, electric pressure is the highest is as prepared auto restart set,
Part II is the region outside region contained by dead electricity region removing Part I, to the searching method in this part region be, in prepared auto restart state matrix B, search for the prepared auto restart that two side gussets only occur in this region, the prepared auto restart that in the prepared auto restart obtain search, electric pressure is the highest is as prepared auto restart set.
3. area power grid prepared auto restart control method centralized 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, namely, when generating net based structures matrix D, even if the branch switch between two nodes disconnects, being also still considered as existence branch road and being reflected in net based structures matrix D; Net based structures matrix D is that each branch road of area power grid is used as nonoriented edge process, if there is branch road, then 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 node total number, d
ijfor the element of the i-th row jth row in net based structures matrix D, d
jifor the element that jth row i-th in net based structures matrix D arranges;
B () prepared auto restart state matrix 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, first two columns is the node serial number of prepared auto restart both sides; 3rd operating state being classified as prepared auto restart, if prepared auto restart is in closure state, then corresponding element is 1, otherwise is 0; 4th electric pressure being classified as this prepared auto restart place bus;
C () described on off state matrix is the matrix of K × 3, description be the running status of switch, the number of behavior switch, first two columns is the node serial number of these switch both sides, and the 3rd is classified as on off state, if switch is in closure state, then corresponding element is 1, otherwise is 0;
D () power supply point distribution matrix is the matrix of M × 1, description be the distribution situation of power supply, behavior node serial number, the distribution situation of what power supply point distribution matrix described is area power grid power supply point, if regional node p is power supply point, then m
p=1, otherwise m
p=0, wherein m
pfor the element that p in power supply point distribution matrix is capable;
E () breakout distribution matrix is the matrix of T × 1, what describe is the distribution situation of branch node, behavior node serial number, containing a large amount of T modes of connection in area power grid, each feeder line Branch Power Flow converges at breakout place and shunts, what breakout distribution matrix described is the distribution situation of area power grid breakout, if area power grid node q is breakout, then t
q=1, otherwise t
q=0, wherein t
qfor the element that q in breakout distribution matrix is capable;
F () contingency set matrix is the matrix of F × 1, description be possible fault element, F is the number of forecast accident element, if element r fault, then f
r=1, otherwise f
r=0, wherein f
rfor the element that r in contingency set matrix is capable.
4. area power grid prepared auto restart control method centralized as claimed in claim 1, it is characterized in that: in described step (2), trend flows to Matrix C and describes trend is flowed to load bus directed walk by power supply point, trend flows to Matrix C and draws by based on net based structures matrix D, be that the branch road of area power grid is used as directed edge, the direction of directed edge is determined by Branch Power Flow direction, if there is a branch road between node i, j, and direction of tide points to j by i, then c
ij=1, c
ji=0.
5. area power grid prepared auto restart control method centralized as claimed in claim 3, is characterized in that:
Following steps are adopted to show that trend flows to Matrix C:
A () is found and is in the switch of off-state and the prepared auto restart of off-state from off state matrix K and prepared auto restart state matrix B, find area power grid node i, the j of the switch of off-state and the prepared auto restart both sides of off-state, the j element of the i-th row in net based structures matrix D and the i element of jth row are set to 0;
B () revises the breakout distribution matrix T after the change of area power grid running status, if a certain switch disconnects, cause corresponding breakout to be changed to ordinary node, then set to 0 by corresponding element in breakout distribution matrix T;
C () obtains the node serial number of power supply from power supply point distribution matrix M, be that starting point starts search with power supply point, i-th row at power supply node i place is found in net based structures matrix D, node j is searched in the i-th row, the j element then retaining the i-th row in net based structures matrix D is constant, is set to 0 by the i element of jth row simultaneously, and then continues search by the identical method of j node, until search endpoint node, namely this row is the node of 0 entirely;
If d () meets termination condition, then search for, exported trend and flow to Matrix C result; Otherwise go to step (c) and continue search, wherein, described termination condition is that trend flows to Matrix C and occurs that element is that the number of the row of 0 is identical with actual electric network endpoint node number entirely.
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| CN103944162B (en) * | 2014-04-15 | 2016-01-20 | 国网辽宁省电力有限公司沈阳供电公司 | A kind of distribution network failure restoration methods based on real time forecast accident collection |
| 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 |
| CN107257163B (en) * | 2017-08-02 | 2020-06-19 | 国网上海市电力公司 | Method for determining network backup switch fault node |
| 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 |
| JP2023500471A (en) | 2019-10-28 | 2023-01-06 | エンフェーズ エナジー インコーポレイテッド | Method and apparatus for microgrid tertiary control with integrated overcurrent protection |
| 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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