基于改进的势能界面判据实时预测电力系统稳定性  

REAL TIME FAST PREDICT TRANSIENT STABILITY BASED CORRECTED POTENTIAL SURFACE CRITERION

作　　者：吕志来[1] 张保会[1] 哈恒旭[1] 

机构地区：[1]西安交通大学电气工程学院,陕西省西安市710049

出　　处：《中国电机工程学报》2002年第4期94-99,共6页Proceedings of the CSEE

基　　金：高等学校博士学科点专项科研基金(RFDP-98069814)

摘　　要：提出了一种电力系统实时快速的暂态稳定预测分析方法,该方法由实测和预测分析相结合,取代了传统暂稳分析方法中的解析推理。基于同步多参量测量装置实时采集和测量得到的数据,利用时差方法(TD法)与具有遗忘因子的BP算法相结合的混合算法直接对这些时间序列数据进行多步预测,导出了利用这些预测的状态量数据的多机系统失步快速预测判据及计算公式,给出了失步预测的构成方案。多种故障条件下的模拟计算结果表明:系统呈 现首摆失稳模式时,失步预测方案给出的稳定边界与使用全部状态量离线数值积分计算所得稳定边界相一致。A new prediction control method is proposed for improving transient stability of power systems in this paper. This method uses the combination of the practical measurement with prediction analysis to replace the traditional deductivecalculation. This paper presented a hybrid algorithm combining the temporal differences methods with BP algorithm basedsynchronization multi-parameter measurement. It helps to solve the computing problem incrementally in traditional BPalgorithm on multi-step predicting and has the ability ofstructural learning. The proposed scheme of high real timeprediction for out-of-step consists of control center basedcomputer and synchronization multi-parameter measuremenbased microprocessors. A number of numerical simulationsunder different swing conditions show that the scheme issatisfied with both correctness and fastness. The fault critical clearing time predicted by the scheme is almost equal to that calculated by the numerical integration program under the same fault conditions.

关 键 词：势能界面 判据 实时预测 电力系统稳定性 

分 类 号：TM712[电气工程—电力系统及自动化]