In order to study the effect on voltage stability by changes of the wind power plant parameters. In the paper, taking reactive power of wind power plant as controllable parameter, the bifurcation analysis on single parameter voltage stability is performed. Then on the basis of single parameter analysis, active power was selected as the second controllable parameter to determine two-parameter bifurcation boundary and conduct two-parameter conditionality analysis. At last the controlling role of static var compensator (SVC) on Hopf bifurcation was analyzed. The research results showed that active power output of wind power plant was limited by reactive power absorbed by wind power plant, and SVC could delay Hopf bifurcation, increase wind power system voltage stability region.%为揭示风电场的参数变化对电力系统动态电压稳定的影响.首先应用延拓算法,以风电场无功功率为控制参数,进行了单参数电压稳定性分岔分析.然后在单参数分析的基础上引入有功功率作为第2个控制参数,进行了双参数分岔边界的确定和双参数制约性分析.最后对静止无功补偿器(SVC)对Hopf分岔的控制作用进行了分析.结果表明:风电场吸收的无功功率限制了风电场有功功率的输出,SVC可以延迟Hopf分岔,提高风电系统电压稳定域度.
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