摘要
风力发电的随机性及异步发电机组运行需要无功支持等显著的风电并网特点,都会对电力系统的脆弱性产生影响。首先搭建风电场模型,其次由支路功率与节点电压建立支路静态能量函数模型,结合电气介数加权,提出一组新的支路脆弱性评估指标,该组指标能够综合反映支路运行状态和结构重要性,克服了传统方法不能两者兼顾的不足。通过对样本系统接入风电场前后、以及不同风速和不同接入点条件下的电网进行算例仿真分析,全面评估了风电并网运行对系统脆弱性的影响。
The significant characteristics of grid-connected wind farm,such as the randomness of wind power generation and the need of reactive support for the operation of asynchronous generator,will affect the vulnerability of power system.Firstly,wind farm model was built.Then,branch static energy function model was constructed on the basis of branch power and node voltage,combining with the electric betweenness.A new set of comprehensive assessment indicators were proposed,which reflected both the vulnerability of branch status and structure that traditional methods cannot take into account at the same time.At last,the simulations of the proposed method under different wind speeds and different access points were carried out in an example system by comparing the vulnerability assessment results before and after wind farm connected,which can comprehensively evaluate the power system vulnerability with wind farm connected.
出处
《电力系统及其自动化学报》
CSCD
北大核心
2014年第2期37-43,共7页
Proceedings of the CSU-EPSA
关键词
风电并网
异步发电机
电力系统脆弱性
支路能量函数
电气介数
脆弱性评估
脆弱支路
grid-connected wind farm
asynchronous generator
power system vulnerability
branch energy function
electric betweenness
vulnerability assessment
vulnerable branch
