CN103679546A - N-1 calculating method for combined calculation of main networks and distribution networks and automatic spare-power switching actions - Google Patents
N-1 calculating method for combined calculation of main networks and distribution networks and automatic spare-power switching actions Download PDFInfo
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Abstract
The invention discloses an N-1 calculating method for combined calculation of main networks and distribution networks and automatic spare-power switching actions. The N-1 calculating method includes the following steps on the basis of combination of the main networks and the distribution networks: a), researching combined network analysis of the main networks and the distribution networks, correlating feeder outlet switches of the distribution networks and low-voltage loads of the main networks, and then performing topology analysis, state estimation and load flow calculation; b), creating automatic spare-power switching models of the main networks according to network frames of the main networks; c); analyzing main-network fault risks caused by simultaneous or successive faults of multiple equipment due to factors such as severe weather, equipment defects and personal faults; d), according to results of the combined network analysis of the main networks and the distribution networks, mapping power-loss low-voltage loads of the main networks to feeders of the distribution networks, and then finding out power-loss distribution transform of the distribution networks due to faults of the main networks; e), analyzing predicted faults of the distribution networks, and analyzing power-loss distribution transform caused by feeder faults; f), summarizing fault analysis results, and summarizing power-loss distribution transform both caused by the faults of the main networks and the distribution networks to acquire an N-1 calculating report based on combination of the main networks and the distribution networks. Generally, the faults of the distribution networks refer to simultaneous or successive faults of multiple feeders due to the factors such as the severe weather, the equipment defects and the personal faults.
Description
Technical field
What the present invention relates to is that the N-1 computing method of taking into account prepared auto restart action are combined in a kind of main distribution.
Background technology
Power distribution network refers to accept electric energy from power transmission network or regional generating plant, is distributed on the spot or distributed to step by step by voltage the power network of all types of user by distribution facility.Power distribution network is usually radiation network and looped network and deposits have different electric pressures, and load kind is numerous and diverse, and significance level is difference to some extent.Power supply mode based on closed loop design, open loop operation becomes the more outstanding feature of power distribution network; Hand in hand, the multi-joint network mode of connection makes power distribution network load transfer become more complicated, the requirement of user's uninterrupted power supply makes load transfer become normality.Scheduling difficulty and risk continue to increase, and objectively need to set up the scheduling decision mechanism based on risk of science more.The power distribution network in city connects major network and power consumer, and the stable operation of power distribution network is related to whether stable operation of whole electric system, and urban power distribution network is carried out to risk assessment, and the weak link of finding out electrical network is of great immediate significance.
Traditional N-1 computing method cannot be carried out main distribution combined calculation, be difficult to introduce the decision-making mechanism based on risk assessment in field of distribution network, the risk evaluating system that lacks the main distribution associating of full voltage grade, lack and a set ofly can at major network, carry out the N-1 computing method of prepared auto restart emulation, lack a set of computing technique that can meet distribution scheduling, the side's of fortune day to day operation needs.
Summary of the invention
The object of the invention is to overcome the deficiency that prior art exists, and provide a kind of main distribution to combine, take into account the N-1 computing method that prepared auto restart moves, these computing method are from intelligent distribution network actual conditions, be conceived to intelligent distribution network risk assessment and safe early warning mechanism, design feature from intelligent distribution network, operation practical experience, equipment running status distribution character is set about, utilize information fusion, the method and technologies such as l-G simulation test, disclose the incidence relation of power distribution network event and power distribution network operation risk, inquire into the caused operation of power networks feature/index of grid event in the time, the regularity of distribution on space, carry out on this basis based on main distribution associating, the N-1 that takes into account prepared auto restart action calculates, analyze risk that intelligent distribution network may face and to the extent of injury of intelligent distribution network and coverage.
The object of the invention is to complete by following technical solution, the N-1 computing method of taking into account prepared auto restart action are combined in described main distribution, and it is included in the commbined foundations of major network and distribution, carries out following job step: main distribution joint network is analyzed; Set up major network prepared auto restart model; Major network contingency analysis; Major network failure effect is derived to Distribution Network Failure consequence; Distribution contingency analysis; Fault analysis result gathers; Specifically:
A) study the analysis of main distribution joint network, with the feeder line gate out switch of distribution and the low-voltage load of major network, carry out associatedly, carry out afterwards topological analysis, state estimation, trend and calculate;
B), according to major network rack, set up major network prepared auto restart model;
C) analyze afterwards a plurality of equipment (comprising major network circuit, bus, main transformer) of causing due to reasons such as inclement weather, equipment deficiency, human errors simultaneously or major network failure risk that successive failure causes, consider the prepared auto restart situation of falling row after fault actions, the action meeting of these prepared auto restarts is discharged to the dead electricity load causing due to fault under charged transformer station automatically;
D) result of then utilizing main distribution joint network to analyze, is mapped to the dead electricity low-voltage load of major network on distribution network feeder, finds out subsequently the dead electricity distribution distribution transforming causing due to major network fault;
E) carry out again distribution contingency analysis, conventionally distribution network failure risk is a plurality of feeder lines whiles or the successive failure causing due to reasons such as inclement weather, equipment deficiency, human errors, the feeder line tripping operation causing as thunderbolt and respective switch tripping or malfunction cause the expansion of power failure equipments etc., and the failure mode showing under different topological structures and different wiring situation is also different, the power failure range causing is also different, analyzes afterwards the dead electricity distribution transforming causing due to feeder fault;
F) finally carry out fault analysis result and gather, the dead electricity distribution transforming that the mistake point distribution transforming that major network fault is caused and Distribution Network Failure cause gathers, and obtains the report calculated of main distribution associating N-1.
The present invention is by the mode to main distribution associating, uncertain factor in operation of power networks is carried out to qualitative assessment, thereby can find out weak link the timely discovering device defect of power distribution network operation, for the reasonable arrangement power distribution network method of operation and in time replacing and the maintenance of equipment provide foundation, to reduce the generation of power outage, reduce loss of outage.
Accompanying drawing explanation
Fig. 1 is the FB(flow block) of computing method of the present invention.
Embodiment
Below in conjunction with specific embodiment and accompanying drawing, the present invention will be described in detail: the N-1 computing method of taking into account prepared auto restart action are combined in main distribution of the present invention, it is included in the commbined foundations of major network and distribution, carries out following job step: main distribution joint network is analyzed; Set up major network prepared auto restart model; Major network contingency analysis; Major network failure effect is derived to Distribution Network Failure consequence; Distribution contingency analysis; Fault analysis result gathers; Specifically:
A) study the analysis of main distribution joint network, with the feeder line gate out switch of distribution and the low-voltage load of major network, carry out associatedly, carry out afterwards topological analysis, state estimation, trend and calculate;
B), according to major network rack, set up major network prepared auto restart model;
C) analyze afterwards a plurality of equipment (comprising major network circuit, bus, main transformer) of causing due to reasons such as inclement weather, equipment deficiency, human errors simultaneously or major network failure risk that successive failure causes, consider the prepared auto restart situation of falling row after fault actions, the action meeting of these prepared auto restarts is discharged to the dead electricity load causing due to fault under charged transformer station automatically;
D) result of then utilizing main distribution joint network to analyze, is mapped to the dead electricity low-voltage load of major network on distribution network feeder, finds out subsequently the dead electricity distribution distribution transforming causing due to major network fault;
E) carry out again distribution contingency analysis, conventionally distribution network failure risk is a plurality of feeder lines whiles or the successive failure causing due to reasons such as inclement weather, equipment deficiency, human errors, the feeder line tripping operation causing as thunderbolt and respective switch tripping or malfunction cause the expansion of power failure equipments etc., and the failure mode showing under different topological structures and different wiring situation is also different, the power failure range causing is also different, analyzes afterwards the dead electricity distribution transforming causing due to feeder fault;
F) finally carry out fault analysis result and gather, the dead electricity distribution transforming that the mistake point distribution transforming that major network fault is caused and Distribution Network Failure cause gathers, and obtains the report calculated of main distribution associating N-1.
Shown in Fig. 1, main distribution of the present invention is combined: major network route is: set up the major network prepared auto restart model consisting of main transformer prepared auto restart, circuit backup power automatic switching and other prepared auto restart, and carry out successively: the dead electricity distribution transforming that major network contingency analysis, the analysis of main distribution joint network and major network fault cause; Distribution route is successively: distribution contingency analysis, analyze the dead electricity distribution transforming that dead electricity distribution transforming that feeder fault causes and Distribution Network Failure cause; The calculating of carrying out N-1 is combined in above-mentioned major network and distribution, obtains N-1 report calculated, by this N-1 report calculated, can analyze risk that intelligent distribution network may face and to the extent of injury of intelligent distribution network and coverage.
Claims (1)
1. N-1 computing method of taking into account prepared auto restart action are combined in main distribution, it is characterized in that it is included in the commbined foundations of major network and distribution, carries out following job step:
A) study the analysis of main distribution joint network, with the feeder line gate out switch of distribution and the low-voltage load of major network, carry out associatedly, carry out afterwards topological analysis, state estimation, trend and calculate;
B), according to major network rack, set up major network prepared auto restart model;
C) analyze afterwards a plurality of equipment (comprising major network circuit, bus, main transformer) of causing due to reasons such as inclement weather, equipment deficiency, human errors simultaneously or major network failure risk that successive failure causes, consider the prepared auto restart situation of falling row after fault actions, the action meeting of these prepared auto restarts is discharged to the dead electricity load causing due to fault under charged transformer station automatically;
D) result of then utilizing main distribution joint network to analyze, is mapped to the dead electricity low-voltage load of major network on distribution network feeder, finds out subsequently the dead electricity distribution distribution transforming causing due to major network fault;
E) carry out again distribution contingency analysis, conventionally distribution network failure risk is a plurality of feeder lines whiles or the successive failure causing due to reasons such as inclement weather, equipment deficiency, human errors, the feeder line tripping operation causing as thunderbolt and respective switch tripping or malfunction cause the expansion of power failure equipments etc., and the failure mode showing under different topological structures and different wiring situation is also different, the power failure range causing is also different, analyzes afterwards the dead electricity distribution transforming causing due to feeder fault;
F) finally carry out fault analysis result and gather, the dead electricity distribution transforming that the mistake point distribution transforming that major network fault is caused and Distribution Network Failure cause gathers, and obtains the report calculated of main distribution associating N-1.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104636990A (en) * | 2015-02-17 | 2015-05-20 | 国家电网公司 | Method of real-time troubleshooting and early warning for shutdown reasons of power grid equipment based on N-1 principle |
| CN104835376A (en) * | 2015-04-14 | 2015-08-12 | 国网上海市电力公司 | Dispatcher training simulation system with automatic switching device of standby power supply automatic safety device operation simulating function |
| CN109191006A (en) * | 2018-09-28 | 2019-01-11 | 广东电网有限责任公司 | A kind of method of 110 kV main transformer N-1 risk automatically scanning of power grid analysis |
| CN109214707A (en) * | 2018-09-28 | 2019-01-15 | 广东电网有限责任公司 | A kind of power grid 110kV bus N-1 risk automatically scanning analysis method |
| CN112330210A (en) * | 2020-11-26 | 2021-02-05 | 国网浙江省电力有限公司舟山供电公司 | Distribution network risk assessment method fusing main network fault analysis |
| CN117689214A (en) * | 2024-01-31 | 2024-03-12 | 天津华凯电气有限公司 | Dynamic safety assessment method for energy router of flexible direct-current traction power supply system |
| CN117689214B (en) * | 2024-01-31 | 2024-05-14 | 天津华凯电气有限公司 | Dynamic safety assessment method for energy router of flexible direct-current traction power supply system |
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| CN103093391A (en) * | 2011-10-28 | 2013-05-08 | 上海博英信息科技有限公司 | City power distribution network arranging method |
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| CN103093391A (en) * | 2011-10-28 | 2013-05-08 | 上海博英信息科技有限公司 | City power distribution network arranging method |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104636990A (en) * | 2015-02-17 | 2015-05-20 | 国家电网公司 | Method of real-time troubleshooting and early warning for shutdown reasons of power grid equipment based on N-1 principle |
| CN104636990B (en) * | 2015-02-17 | 2018-10-02 | 国家电网公司 | Grid equipment stoppage in transit reason based on N-1 criterion is investigated in real time and method for early warning |
| CN104835376A (en) * | 2015-04-14 | 2015-08-12 | 国网上海市电力公司 | Dispatcher training simulation system with automatic switching device of standby power supply automatic safety device operation simulating function |
| CN104835376B (en) * | 2015-04-14 | 2018-06-22 | 国网上海市电力公司 | There is the dispatcher training system system of prepared auto restart automatic safety device action simulation |
| CN109191006A (en) * | 2018-09-28 | 2019-01-11 | 广东电网有限责任公司 | A kind of method of 110 kV main transformer N-1 risk automatically scanning of power grid analysis |
| CN109214707A (en) * | 2018-09-28 | 2019-01-15 | 广东电网有限责任公司 | A kind of power grid 110kV bus N-1 risk automatically scanning analysis method |
| CN109191006B (en) * | 2018-09-28 | 2021-08-10 | 广东电网有限责任公司 | Method for automatically scanning and analyzing risk of N-1 of 110kV main transformer of power grid |
| CN109214707B (en) * | 2018-09-28 | 2021-10-08 | 广东电网有限责任公司 | Power grid 110kV bus N-1 risk automatic scanning analysis method |
| CN112330210A (en) * | 2020-11-26 | 2021-02-05 | 国网浙江省电力有限公司舟山供电公司 | Distribution network risk assessment method fusing main network fault analysis |
| CN112330210B (en) * | 2020-11-26 | 2023-10-27 | 国网浙江省电力有限公司舟山供电公司 | Distribution network risk assessment method integrating main network fault analysis |
| CN117689214A (en) * | 2024-01-31 | 2024-03-12 | 天津华凯电气有限公司 | Dynamic safety assessment method for energy router of flexible direct-current traction power supply system |
| CN117689214B (en) * | 2024-01-31 | 2024-05-14 | 天津华凯电气有限公司 | Dynamic safety assessment method for energy router of flexible direct-current traction power supply system |
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