CN105021921A - Method for recognizing loop closing and opening of power grid based on topology analysis - Google Patents
Method for recognizing loop closing and opening of power grid based on topology analysis Download PDFInfo
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Abstract
The invention relates to a method for recognizing close and open loops of a power grid based on topology analysis, and the method is based on a real-time power grid data model and section, takes a generator set / equivalent line and an equivalent power line as a starting point, carries out the depth-first search analysis of power grid equipment and equipment states through network topology analysis, enables equipment to be divided into an electrical island and a bus number according to the dynamic connection relation of equipment, carries out the analysis of the electrical island and the bus number, and achieves the recognition of the loop closing and opening operations of the power grid. The method can quickly and precisely calculate the loop closing and opening regulation, effectively recognizes the change of an important operation mode of the power grid, provides a basis for the operation analysis of the power grid (the available rate of the analysis results is not less than 99%), facilitates the reduction of a remote operation risk, and improves the safety of remote operation regulation. Moreover, compared with the prior art, the method remarkably improves the operation performance.
Description
Technical field
The invention belongs to electric system regulation automatization field, especially a kind of electrical network based on topological analysis closes recognition methods of unlinking.
Background technology
Along with the quickening of urban construction, urban power consumption is growing, to have a power failure or even the power failure of short time all more responsive.Under this powering mode, accident, interruption maintenance or load transfer plan time unlink operate by closing, the reliability of power distribution network to customer power supply can be guaranteed.But when electrical network closes Open Loop Operation, in the middle of electrical network, larger steady-state current and dash current may be there is.This can have influence on safely and steadily running of electrical network.Therefore, will predict relevant issues in advance before operation, effectively identify that the great method of operation of electrical network changes, this has very important significance to the safe and stable operation of electrical network.
The electrical network of the topology Network Based related in patent of the present invention closes recognition methods of unlinking, can fast, accurate calculation goes out conjunction/Open Loop Operation, effectively identify that the great method of operation of electrical network changes, for operation of power networks analysis provides foundation, be conducive to reducing remote operation risk, promote the security of regulation and control remote operation.
Summary of the invention
The object of the invention is to overcome prior art deficiency, provide a kind of a kind of electrical network based on topological analysis promoting the security of regulation and control remote operation to close recognition methods of unlinking.
The technical solution used in the present invention is:
A kind of electrical network based on topological analysis closes recognition methods of unlinking, the method is based on real-time grid data model and section, with genset/equivalent circuit and equivalent power circuit for starting point, adopt Network topology mode, depth-first search analysis is carried out to grid equipment and equipment state, according to equipment Dynamic link library relation, equipment is divided into different electrical island and bus number, by the analysis to electrical island and bus number, realizes the identification of electrical network being closed to Open Loop Operation.
And the described electrical network based on topological analysis closes recognition methods of unlinking and comprises successively:
(1) electric network model analysis, the electrical equipment of the required search of electricity grid network topological analysis comprises unit, transformer, circuit, bus, switch, disconnecting link, grounding switch etc., wherein, unit, bus, grounding switch, as a single-ended model, distribute one and connect period; Circuit, switch, disconnecting link, as a both-end model, distribute two and connect period; Transformer, according to winding number, two or three connection periods of dynamic assignment, connected equipment connection period is identical;
(2) Network Topology Discovery analysis, with genset/isoline pipeline equipment for starting point, / conjunction state is divided according to equipment connecting relation and equipment, carry out depth-first Network Topology Discovery, until search power failure equipments, load, the electrical equipment for traversal carries out electrical island set, if electrical equipment electrical island is set, then continue search, according to above flow process, until all generators are all searched for complete; Take bus as starting point, carry out Network Topology Discovery equally, search power failure equipments, load, main transformer, carry out bus set for traveled through equipment, according to above flow process, until all buses are all searched for complete;
(3) close and separate ring analysis, system by process simulation drawing/switch-dividing, is analyzed both sides electrical island number and bus number, is differentiated and whether close Open Loop Operation.
And, in the conjunction solution ring analysis that step is (3) described, when switch closing operation, before operation, if switch both sides electrical island is number identical, bus difference, after operation, switch both sides electrical island is number identical, and bus is number identical, then current operation is Loop Closing Operation; When switch divides operation, before operation, if switch both sides electrical island is number identical, bus is number identical, and after operation, electrical island is number identical, and bus difference, then current operation is Open Loop Operation.
Advantage of the present invention and good effect are:
The electrical network of topology Network Based provided by the invention closes recognition methods of unlinking, can fast, accurate calculation goes out conjunction/Open Loop Operation, effectively identify that the great method of operation of electrical network changes, for operation of power networks analysis provides foundation, available rate >=99% of analysis result, be conducive to reducing remote operation risk, promote the security of regulation and control remote operation, its runnability comparatively prior art and way has obvious lifting.
Accompanying drawing explanation
Fig. 1 is the electrical connection schematic diagram in the present invention;
Fig. 2 is the topology search process flow diagram in the present invention;
Fig. 3 is that conjunction in the present invention is unlinked analysis process figure.
Embodiment
Below by accompanying drawing, the invention will be further described in conjunction with specific embodiments, and following examples are descriptive, is not determinate, can not limit protection scope of the present invention with this.
A kind of electrical network based on topological analysis closes recognition methods of unlinking, see Fig. 1, the method is based on real-time grid data model and section, with genset/equivalent circuit and equivalent power circuit for starting point (in Fig. 1, in three circles, alternating current symbol represents), adopt Network topology mode, depth-first search analysis is carried out to grid equipment and equipment state, according to equipment Dynamic link library relation, equipment is divided into different electrical island and bus number, by the analysis to electrical island and bus number, realize the identification of electrical network being closed to Open Loop Operation.In Fig. 1, A-F represents transformer station, and the concrete equipment in transformer station does not draw.The circuit being power supply with generator or equivalence carries out Network Topology Discovery and electrical island, bus computational analysis for starting point, each electrical equipment in final plant stand can generate an electrical island number and bus number, correctly can verify out conjunction Open Loop Operation situation by the numerical value analyzing electrical island before and after electrical equipment operation and bus number.
The electric grid operating of this topology Network Based closes recognition methods of unlinking, and comprises topology search analysis (see Fig. 2) and close separating ring analysis (see Fig. 3) two parts content, and its specific works step is as follows:
Step one: carry out electric network model loading, obtains connection period, the status information of equipment of grid equipment, model load time≤3s;
Step 2: genset/equivalent circuit is extracted, topology search is carried out from genset/equivalent circuit, if the equipment electrical island searched number is-1, then be set to current electrical island number, until each branch road all searches power failure equipments or load, 1 is added to the generator electrical island number that next electrical island number is-1, searches for equally, by that analogy;
Step 3: all buses are extracted, topology search is carried out from sending out bus, if if the equipment bus searched number is-1, then be set to current bus number, until each branch road all searches power failure equipments, load or main transformer, next bus is searched for equally, by that analogy, topological analysis time≤1s;
Step 4: when carrying out switching manipulation, analyzes current switch type, if point operation, obtains the electrical island number of two side apparatus after switching manipulation, bus number, if switch both sides electrical island is number identical, and bus difference, then this is operating as Loop Closing Operation; If closing operation, obtain the electrical island number of two side apparatus before switching manipulation, bus number, if switch both sides electrical island is number identical, bus difference, then this is operating as Open Loop Operation, closes/unlink checking time≤1s.
Through inspection, available rate >=99% of this method analysis result
Although disclose embodiments of the invention and accompanying drawing for the purpose of illustration, but it will be appreciated by those skilled in the art that: in the spirit and scope not departing from the present invention and claims, various replacement, change and amendment are all possible, therefore, scope of the present invention is not limited to the content disclosed in embodiment and accompanying drawing.
Claims (3)
1. the electrical network based on topological analysis closes recognition methods of unlinking, it is characterized in that: the method is based on real-time grid data model and section, with genset/equivalent circuit and equivalent power circuit for starting point, adopt Network topology mode, depth-first search analysis is carried out to grid equipment and equipment state, according to equipment Dynamic link library relation, equipment is divided into different electrical island and bus number, by the analysis to electrical island and bus number, realizes the identification of electrical network being closed to Open Loop Operation.
2. the electrical network based on topological analysis according to claim 1 closes recognition methods of unlinking, and it is characterized in that: the described electrical network based on topological analysis closes recognition methods of unlinking and comprises successively:
(1) electric network model analysis, the electrical equipment of the required search of electricity grid network topological analysis comprises unit, transformer, circuit, bus, switch, disconnecting link, grounding switch etc., wherein, unit, bus, grounding switch, as a single-ended model, distribute one and connect period; Circuit, switch, disconnecting link, as a both-end model, distribute two and connect period; Transformer, according to winding number, two or three connection periods of dynamic assignment, connected equipment connection period is identical;
(2) Network Topology Discovery analysis, with genset/isoline pipeline equipment for starting point, / conjunction state is divided according to equipment connecting relation and equipment, carry out depth-first Network Topology Discovery, until search power failure equipments, load, the electrical equipment for traversal carries out electrical island set, if electrical equipment electrical island is set, then continue search, according to above flow process, until all generators are all searched for complete; Take bus as starting point, carry out Network Topology Discovery equally, search power failure equipments, load, main transformer, carry out bus set for traveled through equipment, according to above flow process, until all buses are all searched for complete;
(3) close and separate ring analysis, system by process simulation drawing/switch-dividing, is analyzed both sides electrical island number and bus number, is differentiated and whether close Open Loop Operation.
3. the electrical network based on topological analysis according to claim 2 closes recognition methods of unlinking, it is characterized in that: in the conjunction solution ring analysis that step is (3) described, when switch closing operation, before operation, if switch both sides electrical island is number identical, bus difference, after operation, switch both sides electrical island is number identical, and bus is number identical, then current operation is Loop Closing Operation; When switch divides operation, before operation, if switch both sides electrical island is number identical, bus is number identical, and after operation, electrical island is number identical, and bus difference, then current operation is Open Loop Operation.
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| Publication number | Priority date | Publication date | Assignee | Title |
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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 |
| CN112199861A (en) * | 2020-10-29 | 2021-01-08 | 云南电网有限责任公司电力科学研究院 | Method for judging closed-loop power regulation feasibility of power distribution network |
| CN115144679A (en) * | 2022-08-31 | 2022-10-04 | 武汉格蓝若智能技术有限公司 | Method and system for identifying real-time topological relation of collected voltage on line |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN112199861A (en) * | 2020-10-29 | 2021-01-08 | 云南电网有限责任公司电力科学研究院 | Method for judging closed-loop power regulation feasibility of power distribution network |
| CN112199861B (en) * | 2020-10-29 | 2023-04-07 | 云南电网有限责任公司电力科学研究院 | Power distribution network closed-loop power regulation feasibility judgment method |
| CN115144679A (en) * | 2022-08-31 | 2022-10-04 | 武汉格蓝若智能技术有限公司 | Method and system for identifying real-time topological relation of collected voltage on line |
| CN115144679B (en) * | 2022-08-31 | 2022-11-29 | 武汉格蓝若智能技术有限公司 | Method and system for identifying real-time topological relation of collected voltage on line |
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