摘要
以往的动态无功配置方法大多以确保静态电压稳定为目标,而快速可控的动态无功补偿装置更适用于抑制电网的暂态电压失稳。文中首先分析并指出故障后的极限切除时间是系统暂态电压稳定性的一个衡量指标,安装动态无功补偿可以延长故障的极限切除时间。根据这种特点提出了一种基于极限切除时间指标的动态无功优化配置算法,比较各种配置方案对电网故障后极限切除时间的改变量以得到最优方案。通过IEEE39母线系统的算例说明了该方法的有效性。
The available allocation methods of dynamic Var compensation almost take the ensuring static voltage stability as the objective, while fast responsibility makes dynamic Vat compensation suitable for maintain transient voltage stability. In this paper, the mechanism of transient voltage collapse and improving transient voltage stability by dynamic Vat compensation are analyzed. It is concluded that the critical fault clearing time can be used as an index to evaluate the transient voltage stability, and the allocation of dynamic Var compensation could extend the critical fault clearing time. According to these conclusions, a method for optimal allocation of dynamic Var compensation based on critical fault clearing time is proposed. By comparing the changes of critical clearing time of all critical contingencies before and after dynamic Var compensation placed, an index is drawn to be a criterion of optimal allocation of dynamic Vat compensation, and the optimal allocation scheme is obtained. The method is validated through simulations on IEEE 39-bus power system.
出处
《电力系统自动化》
EI
CSCD
北大核心
2009年第14期17-21,共5页
Automation of Electric Power Systems
基金
国家重点基础研究发展计划(973计划)资助项目(2004CB217907)~~
关键词
动态无功补偿
暂态电压稳定
极限切除时间
静止同步补偿器
dynamic Var compensation
transient voltage stability
critical fault clearing time
static synchronous compensation（STATCOM）
