计及暂态稳定约束的电厂送出系统重合闸时间整定方法研究

Research on the method to set reclosing time of power plant transmission system considering transient stability constraints

基于我国现行的安全稳定导则,发电厂送出线路的重合闸时间可能直接影响电厂的送出能力。为保证电厂送出能力不因重合闸时间整定不合理而降低,建立了考虑重合闸时间对系统暂态稳定性影响的数学模型。应用EEAC(Extended Equl-Area Criterion)暂态稳定量化分析方法研究了考虑重合闸时间的电厂送出系统暂态稳定特性,提出了一种计及暂态稳定约束的电厂送出系统重合闸时间整定方法。实际系统仿真表明,利用该方法能快速确定重合闸时间整定的合理区间,保证重合闸时间整定值满足系统暂态稳定要求。

According to the current Guide on Security and Stablility for Power System, the reclosing moment of power plant transmission lines directly affects the power plant transmission ability. This paper establishes a mathematical model of system transient stability affected by reclosing moment. The system stability characteristics considering reclosing time is studied based on Extended Equl-Area Criterion （EEAC） theory. An approach to setting the reclosing time considering transient stability is proposed. The actual power system simulation shows that it can identify the reasonable range of reclosing time quickly and ensure that the setting value of reclosing time meets the system transient stability requirement.