摘要
针对传统突变量检测方法易受电网频率波动影响及其改进算法又难以满足继电保护速动性要求,提出了一种新型的自适应面积突变量算法。该算法取每个半周一段时间内电流积分差值作为判断突变量是否发生的依据,采样频率自适应跟踪电网频率,面积宽度随电流幅值大小自适应调整。基于该算法的线路保护装置已经通过国家继电保护及自动化设备质量监督检验中心的动模实验验证,实验显示在突变量发生时,突变量启动元件能快速动作,抗干扰能力强,可靠性高,可快速准确地判断突变量。实验结果表明了该算法的可行和合理性。
For raditional break-variable detecting method is easy to be influenced by grid frequency and its im- proved algorithm is hard to meet the relay speed requirements, the paper proposes a kind of new adaptive area break-variable algorithm. The algorithm takes the difference of current integral in each half cycle as the criteria to judge whether the break-variable occurred. Its sampling frequency could track the that of power system a- daptively and the area width could he adjusted with the current amplitude adaptively. The line protection device based on this algorithm has passed the dynamic simulation examination in National Relay Protection and Auto- mation Equipment Quality Supervision and Inspection Center. The experiment shows that the starting element can make fast action when break-variable occurred. It is better in interference ability, high in reliability and could detect break-variable rapidly and accurately. The experiment result shows that the algorithm is feasible and reasonable.
出处
《电力系统及其自动化学报》
CSCD
北大核心
2012年第3期76-79,共4页
Proceedings of the CSU-EPSA
关键词
突变量算法
继电保护
自适应
动模实验
break-variable algorithm
relay protection
adaptive
dynamic simulation examination
