计及分布式电源的配电网节点脆弱性分析

配电网作为分配电能的电力网络,随着分布式电源(distributed generation,DG)的接入,配电网变得复杂化,其安全运行问题备受关注,如何找出配电网中的薄弱节点这一问题亟待解决。为保证电力系统安全可靠运行,本文基于复杂网络理论和风险理论提出配电网节点脆弱性的综合指标,求得网络中的脆弱节点,再结合各具体指标数据,定性的分析节点具体薄弱因素,提出改进方式,改进整个网络的脆弱性,为电网工业安全带来保证。本文对于分布式电源的接入位置也有一定的指导作用,分布式电源大都为清洁能源,合理的选择接入点,可以提高电网的可靠运行以及清洁能源的利用率,减少污染排放。

Vulnerability Analysis of Distribution Network Nodes Considering Distributed Generation

Distribution network is the power network of distribution power. With the access of distributed generation (DG), the safe operation of distribution network has attracted much attention and how to find out the weak nodes in distribution network is urgent to be solved. In order to ensure the safe and reliable operation of the power system, this paper puts forward the node comprehensive indexes of the vulnerability of the distribution network based on the complex network theory and the risk theory, and obtains the fragile nodes in the network. Combined with the specific indexes, the specific weak factors of the nodes are qualitatively analyzed, and then some improvements are raised, to improve the vulnerability of the whole network and guarantee the industrial safety of power grid. This paper also has a certain guiding role for the access location of distributed power sources. Distributed power supplies are mostly clean energy, and reasonable selection of access points can improve the reliable operation of the power grid and the utilization of clean energy, which will reduce pollution emissions.