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Selection method for optimal path of black-start network reconstruction

An optimal path and network reconfiguration technology, applied in the direction of single-network parallel feeding arrangement, etc., can solve the problems of the black start process not being fast enough, not taking into account the limitation of unit start-up time, etc., and achieve the effect of reducing the black start time

Active Publication Date: 2020-04-21
云南电网有限责任公司怒江供电局
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AI Technical Summary

Problems solved by technology

Most of the algorithms proposed above focus on the optimization of the power transmission path or the optimization of the operation sequence, without considering the limitation of the start-up time of the unit, and the black start process is not fast enough

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  • Selection method for optimal path of black-start network reconstruction
  • Selection method for optimal path of black-start network reconstruction
  • Selection method for optimal path of black-start network reconstruction

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Embodiment Construction

[0022] Such as figure 1 As shown, the method for selecting the optimal path for black-start network reconstruction described in the present invention, the specific steps are as follows:

[0023] Step 1: Taking the switch stations, network hub substations, and hydropower stations in various regions as nodes during the black start process, and taking the switching stations, network hub substations, and connecting lines between hydropower stations as sides, comprehensively consider important loads and branch roads during the black start process. Parameters, etc., assign a weight to each edge to form a start node vector S, an end node vector E, and an edge weight vector W.

[0024] Among them, start node vector S=[1 2 3 ... n-1]; end node vector E=[3 ... n]; edge weight vector W=[a b c d ...]. In the formula, n represents the total number of power grid switch stations, network hub substations and hydropower station nodes in each region; Weights, the weights assigned to key lines...

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Abstract

The invention discloses a selection method for an optimal path of black-start network reconstruction. The method comprises the steps of firstly, taking power grid switching stations, network hub substations and hydropower stations of all regions in the black-start process as nodes, taking connection lines among the switching stations, the network hub substations and the hydropower stations in allregions as edges, comprehensively considering important loads, branch parameters and the like in the black-start process, assigning a weight value to each edge, forming a starting node vector, a termination node vector and an edge weight vector, forming a sparse matrix of an incidence matrix, establishing a directed graph object, displaying each path weight, and finally solving a shortest path from a specified starting node to a terminal point and marking the shortest path. The method has the capability of selecting the optimal path for network reconstruction in the black-start process, the optimal path is searched for black-start network reconstruction, the black-start time is shortened, a foundation is laid for subsequent comprehensive load recovery of a power grid, and the method is ofgreat significance to the whole black-start process.

Description

technical field [0001] The invention belongs to the technical field of power system operation, and specifically relates to a method for selecting an optimal path for black start network reconfiguration. Background technique [0002] The restoration of power supply after a power outage in the power system is a very complicated and time-consuming task, and a large-scale power outage in the system is a low-probability event. Neither dispatchers nor operators of power plants and substations have much practical experience. It is necessary for each power grid to formulate a system recovery plan for black start or external power receiving start in advance according to their actual network, and make preparations for recovery scheduling. After a system-wide power outage or a large-scale regional power outage, the recovery time is longer and more complicated, and the main contradictions and goals of the system in different stages of the recovery process are different. The line builds...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38
CPCH02J3/38Y04S10/50
Inventor 刘晓欣杨修正普碧才孔碧光刘志坚英自才李玲芳王陈喜冯建辉和玲和仕向戴小重佘有明李曦闻彰叶熊仲金张玉梅田锦钊陈永忠马翰超李彦祥王翔晏永飞徐慧张伯谦
Owner 云南电网有限责任公司怒江供电局
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