摘要
为了提高电力系统电压稳定性,预防电压崩溃,维持电网安全运行,笔者建立了UPFC的等效注入功率模型,采用特征结构分析法(ESA)对系统当前运行状态进行了静态电压稳定分析,并以最小模特征值作为静态稳定的度量。通过电压灵敏度和状态变量对特征模式的参与因子两种指标找到了系统薄弱环节,分别在系统最薄弱节点和一般薄弱节点处安装了UPFC,进行了新英格兰39节点系统计算。算例分析结果表明,UPFC能够提高电网最低的节点电压,提高系统电压稳定性。
In order to enhance power system voltage stability, prevent from voltage collapse, and maintain safe op- eration, the author establishes the equivalent injection power equation of UPFC, and analyzes the static voltage sta- bility of the system at the current operation condition by ESA, and takes the minimum eigenvalue as the metric of static stability. The weak point of the system is found by voltage sensitivity and state variable. The author advises to install UPFC at the weakest node of system and at a weak one, and calculates in New England 39 - node system. The example shows that UPFC is able to enhance the lowest node voltage so as to improve system voltage stability.
出处
《黑龙江电力》
CAS
2014年第6期486-490,共5页
Heilongjiang Electric Power
