基于二次谐波电流含有率识别CT饱和方案
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摘要
CT饱和会对电力系统的控制与保护带来影响。详细分析了CT正常传变以及饱和时其二次侧电流的二次谐波特性,分析发现CT正常传变与饱和时二次谐波电流含有率差异很大,进而提出了基于二次谐波电流含有率的识别CT饱和的方案。最后通过J-A模型模拟CT并搭建仿真模型,仿真结果验证了新方案的正确性。
The CT saturation will affect the control and protection of power system. The characteristics of the second harmonics in second side are analyzed in detail under CT normal operation and saturation. In addition, the second current percentage varies greatly between CT normal operation and saturation. Then, a novel discrimination method based on the percentage of the second harmonic current is presented. At last, the simulation model is built based on the J-A model of CT. The simulation results show the conclusions re reasonable.
The CT saturation will affect the control and protection of power system. The characteristics of the second harmonics in second side are analyzed in detail under CT normal operation and saturation. In addition, the second current percentage varies greatly between CT normal operation and saturation. Then, a novel discrimination method based on the percentage of the second harmonic current is presented. At last, the simulation model is built based on the J-A model of CT. The simulation results show the conclusions re reasonable.
引文
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[7]王玉梅,谷斐,张国治,等.基于双判据融合的电流互感器磁饱和检测算法[J].河南理工大学学报,2015,34(3):390-396.
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[9]李宁彩,司大军,王洪亮,等.中压系统中非周期分量对电流互感器暂态饱和影响[J].云南电力技术,2014,42(12):100-103.
[10]刘跃峰.校核电流互感器饱和的方法和抗饱和措施[J].云南电力技术,2012,40(12):81-83.
[2]周昊程,陆广香,周建新,等.负荷变压器差动速断保护区外故障误动原因分析及对策[J].电力系统自动化,2014,38(14):122-125.
[3]李旭,黄继东,倪传坤,等.不同电流互感器对线路差动保护的影响及对策研究[J].电力系统保护与控制,2014,42(3):141-145.
[4]郑涛,陈佩璐,刘连光,等.计及直流偏磁的电流互感器传变特性对差动保护的影响[J].电力系统自动化,2012,36(20):89-93.
[5]罗慧,周卿松,苗红雷,等.基于LMD母线差动保护CT饱和检测方法研究[J].电力系统保护与控制,2015(12):49-54.
[6]毕大强,冯存亮,葛宝明.电流互感器局部暂态饱和识别的研究[J].中国电机工程学报,2012,32(31):184-190.
[7]王玉梅,谷斐,张国治,等.基于双判据融合的电流互感器磁饱和检测算法[J].河南理工大学学报,2015,34(3):390-396.
[8]黄志元,何奔腾,张雪松.利用磁制动检测电流互感器饱和的实用化研究[J].电力系统自动化,2006,30(4):75-79.
[9]李宁彩,司大军,王洪亮,等.中压系统中非周期分量对电流互感器暂态饱和影响[J].云南电力技术,2014,42(12):100-103.
[10]刘跃峰.校核电流互感器饱和的方法和抗饱和措施[J].云南电力技术,2012,40(12):81-83.