CN105391058A - Regional power grid anti-error network topology analysis method - Google Patents
Regional power grid anti-error network topology analysis method Download PDFInfo
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- CN105391058A CN105391058A CN201510815203.0A CN201510815203A CN105391058A CN 105391058 A CN105391058 A CN 105391058A CN 201510815203 A CN201510815203 A CN 201510815203A CN 105391058 A CN105391058 A CN 105391058A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses a regional power grid anti-error network topology analysis method. The method comprises the following steps of: firstly, carrying out connectivity analysis on a transformer substation, and specifically, analyzing how many calculating nodes are formed when bus segments of the transformer substation are connected by closing switches; secondly, carrying out system network analysis, specifically, connecting topological nodes of the whole system by branches, and analyzing how many subsystems the system are divided into; and thirdly, carrying out measuring quantity system analysis, specifically, dividing a measuring system according to the subsystems, and checking the observability of each subsystem. According to the invention, power grid devices to be connected are directly connected together, each kind of power grid device is subjected to equivalence processing for forming a network model required by calculation, and based on transformer substation SVG figures and CIM data models obtained from a monitoring system, figure-model sharing is realized.
Description
Technical field
The present invention relates to the anti-error topological analysis technique of electrical network.
Background technology
A main operational outfit of area power grid has generator, transformer, circuit, bus, Shunt Capacitor Unit etc., various grid equipment is linked together by switch, disconnecting link and jointly forms electrical network, and the state changing switch and disconnecting link can form different operational modes.In order to analytical calculation can be carried out under various operational mode, realize the anti-false judgment of the complex operations modes such as the load rejection under special operational mode, cyclization/unlink, female, other generation, the topological analysis of graphic based annexation and model node must be carried out.
Summary of the invention
Technical problem to be solved by this invention is just to provide the anti-error network topology analytical method of a kind of area power grid, by the analysis to switch and disconnecting link real-time status, the grid equipment linked together is connected directly between together, and various grid equipment is formed the network model needed for calculating by equivalent process, make anti-false judgment not only be confined to the anti-false judgment of conventional circuit breaker, isolating switch, grounding switch and ground wire, also can meet the judgement of the complex operations modes such as load rejection, cyclization/unlink, female, other generation.
For solving the problems of the technologies described above, the present invention adopts following technical scheme: the anti-error network topology analytical method of a kind of area power grid, comprises the steps:
The first step is the Topology Analysis Based of transformer station, and the bus section, busbar section analyzing transformer station is connected into how much calculating node by Closing Switch;
Second step is grid analysis, and the topological node of whole system is tied by branch road, and analytical system is divided into how many subsystems;
3rd step is system for measuring quantity analysis, by system subdivision measurement system, and checks the observability of each subsystem.
Further, the rudimentary algorithm of the Topology Analysis Based of transformer station adopts stack mechanism, utilizes stack mechanism to search for the process of connected node contained by a certain bus as follows:
1) each connected node and each switch are put with non-search sign;
2) by a certain connected node, this node is placed in storehouse ground floor;
3) push on: by search switch element, find the connected node do not searched for of the Closing Switch of not searching for be connected, be placed in lower layer stack, and this switch and connected node are put search sign;
4) stack is moved back: a certain connected node without the Closing Switch of not searching for, or does not search for Closing Switch opposite end without not searching for connected node, then move back layer stack;
5) return to the node that sets out: when continuing to move back stack, terminate search procedure, complete the search procedure of a bus.
4th step is from the SVG figure and CIM of transformer station, comprise primitive information and the map data mining platform of various equipment, search out the annexation of the relevant switch of operation, isolation switch, grounding switch, and carry out the differentiation of various electrical island, ground connection island, connection branch road, anti-error topology is correctly worked.
The anti-error network topology analytical method of electrical network of the present invention, the grid equipment linked together is connected directly between together, and various grid equipment is formed the network model needed for calculating by equivalent process, and it is shared to realize artwork based on the transformer station SVG figure obtained from supervisory control system and CIM data model.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the invention will be further described:
Fig. 1 is general network model schematic diagram;
Fig. 2 is that transformer station wiring analyzes schematic diagram;
The process schematic of Fig. 3 for utilizing stack mechanism to search for connected node contained by a certain bus.
Embodiment
Each grid equipment has end points (Terminal) that is one or more and other equipment connections, and these end points are general with an integer representation in figure describes, and are called as node (Node).Node is referred to as connected node (Connectivitynode) before topological analysis.Connected node is the judgment criterion (being connected by 0 impedance) that equipment room is connected, as disconnecting link is connected with bus with disconnecting link, disconnecting link with circuit, switch.The number of connected node is a large amount of, is the basic description of electrical network, is the basic input of topological analysis.The number of connected node is relatively substantially constant.Topological node (Topologicalnode) is made up of multiple connected node, it is the model node generated after topological analysis, linked together by closed switch, disconnecting link, it is the result of topological analysis, be commonly referred to as bus nodes (Bus), the number of topological node can change along with the change of operational mode.
Due to a variety of causes (mainly power grid accident), an electrical network may be split into multiple part (subnet) independent operating, each independently subnet (Subnet) be called as an electrical island (Topologicalisland).Electrical island is divided into island alive (Liveisland) and dead island (Deadisland) according to there being inactivity to inject, and electrical network calculates and should be able to calculate each island of living.
Switchgear is topmost grid equipment in topological analysis, and the change of its state is by the electric network model after the structure of change network and topological analysis.Switchgear is two-port equipment, when on off state is for time closed, is commonly referred to as 0 impedance branch.The main Types of switchgear has: wire jumper, isolating switch (disconnecting link), circuit breaker (switch), fuse (fuse), on-load switch (can only opening and closing normal duty electric current).
When setting up network description, effective way is that the node of element is described the part described as graphics device.An element is multiport parts, respectively connection bus, ground wire and other equipment (as circuit, generator etc.).
In topological analysis, the description of the information used in the topological analysiss such as connected node, topological node, electrical island is summarized as:
◆ each grid equipment has one or more end points;
◆ each end points belongs to a connected node;
◆ connected node is a member of topological node, and topological node is made up of multiple connected node.
Topological node is a member of electrical island, and an electrical island is made up of multiple node and branch road.Have a large amount of junction nodes in network description, accurate is very important with numbering junction nodes fast.Realizing the automation of junction nodes numbering according to some principle is optimal selection.The automation of numbering generally substantially can be realized by plant stand numbering, element anode numbering and element geometric coordinate 3 information.
The model (referring to the result after topological analysis) of universal network as shown in Figure 1, only has two basic elements: node, branch road in the model of universal network, in Fig. 1, an electrical island comprises 10 nodes, the network of 12 branch roads.
In general network description, node has electromotive force and injection rate, and description corresponding in electric power system has busbar voltage (amplitude and phase angle) and bus power to inject (meritorious injection, idle injection).Have power flow and impedance for the description that branch road is general, corresponding in electric power system is impedance or the equivalent impedance of trend (effective power flow, reactive power flow) and equipment.
Network topology is a public functional block, and major function is the Mathematical Modeling that network physical is modeled as calculating by foundation Real-Time Switch state.Network topology is the prerequisite of various application software, in various network analysis, as state estimation, and Load flow calculation, voltage and reactive power optimization, accident analysis and dispatcher's simulation training etc.
The task of topological analysis is the change processing switching information in real time, automatic division power plant, the calculating nodal point number of transformer station, forms new network topology, the data such as sendout measurement and injection rate, provide the information and date under new junction style to relevant application program thereupon.
The change of electric power system Real-Time Switch state may be excision or drop into generator or load; The calculating node that the bus section, busbar section of transformer station may be made corresponding changes; Also may cause electrical network open loop, cyclization, parallel off and arranged side by side etc.The feature of electric power system real-time topology analysis is accurate and carries out the logical operation of complexity in a large number rapidly.
The first step of Network topology is the Topology Analysis Based of transformer station, and function is that the bus section, busbar section analyzing transformer station is connected into how much calculating node by Closing Switch.The result of transformer station wiring analysis is that each transformer station is divided into several nodes, also can be called node analysis.That is this step is that the connected node in graphics system is parsed into discrete topological node.
As shown in Figures 2 and 3, for a sesquialter mode of connection plant stand, illustrate that this plant stand storehouse method completes the process of topological node search.
The rudimentary algorithm of this step adopts " storehouse " principle---the search logic that last in, first out.Stack mechanism is utilized to search for the process of the contained connected node of a certain bus (topological node) as follows:
1) each connected node and each switch are put with non-search sign;
2) by a certain connected node (the first connected node of such as CBA1 switch), this node is placed in storehouse ground floor;
3) push on: by search switch element, find the connected node do not searched for of the Closing Switch of not searching for be connected, be placed on (and this switch and connected node are put search sign) in lower layer stack
4) stack is moved back: a certain connected node without the Closing Switch of not searching for, or does not search for Closing Switch opposite end without not searching for connected node, then move back layer stack;
5) return to the node that sets out (i.e. ground floor storehouse): when continuing to move back stack, terminate search procedure, complete the search procedure of a bus (topological node).
The second step of Network topology is grid analysis, and task is that the topological node of whole system is tied by branch road, and analytical system is divided into how many subsystems (electrical island).Grid analysis result to have the topoligical node of electrical link to be divided in a subsystem, system not parallel off under normal circumstances, the whole network is a subsystem.
The process that second step and the first step are above analyzed is consistent, and just connected node is changed to topological node, switch element is changed into both-end branch road, detailed process is ignored.
3rd step of Network topology is system for measuring quantity analysis, and task is by system subdivision measurement system, and checks the observability of each subsystem.Measurement system analysis result will meet the data demand of practical power systems state estimation.
The quantity of real network breaker in middle may reach hundreds of to several thousand, and in order to meet the requirement of real-time, Network topology should ensure, to the reliable analysis of various complicated tie lines, should reduce amount of calculation as far as possible again.
It is another process (inverse process) of topological analysis that result of calculation turns back in the corresponding data attribute field of original component, according to the information formed during forward lookup, result of calculation be correctly assigned in external electrical network description, the data be assigned will directly apply to man-machine interface.
The feature of Network topology needs the logical operation of complexity in a large number, computational speed is improved in order to reduce amount of calculation, we have employed following technology: carry out transformer station wiring analysis and system Topology Analysis Based with stack mechanism, in order to improve on-line analysis speed, have employed and distribute row number and positive and negative contingency table supervisor skill avoids the search of scan-type.
In addition, Network topology has in real time and research two kinds of modes.Network topology can regularly or start at any time.
4th step of Network topology is pattern analysis, transformer station SVG figure and CIM data model is obtained from supervisory control system, carry out two modelings completion anti-error device model by drawing instrument, and realize the real-time anti-false judgment based on current Graphics equipment state according to topological anit-misoperation rules language.
Claims (2)
1. the anti-error network topology analytical method of area power grid, is characterized in that comprising the steps:
The first step is the Topology Analysis Based of transformer station, and the bus section, busbar section analyzing transformer station is connected into how much calculating node by Closing Switch;
Second step is grid analysis, and the topological node of whole system is tied by branch road, and analytical system is divided into how many subsystems;
3rd step is system for measuring quantity analysis, by system subdivision measurement system, and checks the observability of each subsystem.
2. the anti-error network topology analytical method of a kind of area power grid according to claim 1, is characterized in that: the rudimentary algorithm of the Topology Analysis Based of transformer station adopts stack mechanism, utilizes stack mechanism to search for the process of connected node contained by a certain bus as follows:
1) each connected node and each switch are put with non-search sign;
2) by a certain connected node, this node is placed in storehouse ground floor;
3) push on: by search switch element, find the connected node do not searched for of the Closing Switch of not searching for be connected, be placed in lower layer stack, and this switch and connected node are put search sign;
4) stack is moved back: a certain connected node without the Closing Switch of not searching for, or does not search for Closing Switch opposite end without not searching for connected node, then move back layer stack;
5) return to the node that sets out: when continuing to move back stack, terminate search procedure, complete the search procedure of a bus.
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Cited By (3)
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| CN107658870A (en) * | 2017-10-17 | 2018-02-02 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | People having the same aspiration and interest unit division Fast implementation based on divided power system topological structure |
| CN112528449A (en) * | 2021-01-01 | 2021-03-19 | 谭世克 | Power distribution network computing bus forming method |
| CN113515826A (en) * | 2021-04-09 | 2021-10-19 | 云南电网有限责任公司昆明供电局 | Power distribution network closed loop circuit topology searching method and system |
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| CN107658870A (en) * | 2017-10-17 | 2018-02-02 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | People having the same aspiration and interest unit division Fast implementation based on divided power system topological structure |
| CN112528449A (en) * | 2021-01-01 | 2021-03-19 | 谭世克 | Power distribution network computing bus forming method |
| CN112528449B (en) * | 2021-01-01 | 2022-07-05 | 青岛公能新能源科技有限公司 | Power distribution network computing bus forming method |
| CN113515826A (en) * | 2021-04-09 | 2021-10-19 | 云南电网有限责任公司昆明供电局 | Power distribution network closed loop circuit topology searching method and system |
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Application publication date: 20160309 |