Vulnerable line recognition method for power distribution network

An identification method and a technology for power distribution lines, which are applied in the direction of circuit devices, AC network circuits, electrical components, etc., can solve the problems of weak line identification methods that need to be improved, safety hazards, and single vulnerable indicators

Pending Publication Date: 2018-04-10
广东电网有限责任公司惠州供电局
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Problems solved by technology

[0004] However, when introducing research methods such as complex network theory, the definition of most vulnerability indicators is still considered relatively simple, and the structural characteristics and operating characteristics of the power system

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  • Vulnerable line recognition method for power distribution network
  • Vulnerable line recognition method for power distribution network
  • Vulnerable line recognition method for power distribution network

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Embodiment Construction

[0056] The technical solutions of the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0057] The invention provides a method for identifying vulnerable lines in a distribution network, which calculates a line vulnerability evaluation index from the perspective of the topology structure and operating state of the power grid to quantify the size of the vulnerability, so as to identify the vulnerable line. The specific steps are as figure 1 shown, including:

[0058] Step S1, according to the topology structure of the distribution network and the power flow results in the normal operation state of the system, calculate the active power index of the distribution line. Calculate the degree k of all nodes in the system according to the topology of the distribution network i , determine the active injection power P of all nodes in the system according to the power flow calculation results under nor...

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Abstract

The invention discloses a vulnerable line recognition method for a power distribution network, and the method comprises the steps: calculating the active degree and improved betweenness of a line according to a system structure of the power distribution network; calculating the potential safety hazard vulnerability of the line according to the load impact and the condition of a fault line; calculating the weight coefficient of each index through an analytic hierarchy process, integrating all indexes and factors according to the weights, and obtaining the vulnerability index of the line of thepower distribution network. According to the scheme of the invention, the method gives full consideration to the structural characteristics and operation characteristics of the power distribution network. Compared with a conventional vulnerability evaluation index, the indexes can reflect the importance of the line in a system topological structure, and also can reflect the potential safety hazardvulnerability of the line under the load impact and fault line breakage. The vulnerable line in the power distribution network can be recognized more reasonably and effectively according to the calculated value of the integrated vulnerability index.

Description

technical field [0001] The invention relates to the technical field of power systems, in particular to a method for identifying vulnerable lines in a distribution network. Background technique [0002] In recent years, frequent blackouts at home and abroad have attracted widespread attention. Taking the 2003 American and Canadian blackouts and the 2006 Western Europe blackouts as examples, the occurrence of many blackouts has seriously affected people's normal life and caused huge Economic losses. Accident analysis shows that large-scale power outages often start from the cascading failure of individual components, and are closely related to the vulnerable links in the power system during the propagation and expansion stage of the accident. Therefore, it is of great significance to accurately identify the vulnerable links in the power system and take corresponding control strategies to improve the security of the power system and reduce the probability of failure. [0003]...

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Application Information

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IPC IPC(8): H02J3/00
CPCH02J3/00H02J2203/20
Inventor 王孝琳张繁碧黄志球张志宏蔡思海黄锦伟李高标欧志光陈德权邓惠华何奕枫黄国良郑超裴月琳罗星球赖来源周晓明郭琳林冠强陈慧欢刘智斌何鸿远朱锡锋林丽红胡凯何志强郑伟杰叶剑挺
Owner 广东电网有限责任公司惠州供电局
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