基于波形间断角原理识别变压器励磁涌流的新方法  

A new method to identify inrush current based on the principle of dead angle

作　　者：卢雪峰[1] 王增平[1] 徐岩[1] 王慈[1] 

机构地区：[1]华北电力大学电力系统保护与动态安全监控教育部重点实验室,河北保定071003

出　　处：《继电器》2007年第S1期1-4,共4页Relay

摘　　要：本文提出了一种利用波形间断角原理和模糊贴近度原理相结合识别励磁涌流的新方法。该方法的基本思路是,对于理想的故障电流,其任意半周期的面积为一个整周期面积的1/2,而励磁涌流波形由于间断角的存在,没有上述特点,基于此再结合模糊贴近度原理实现故障电流和励磁涌流的区分。仿真结果表明,该算法特征明显,易于工程实现,而且鉴别准确。This paper proposes a new method of using the principle of dead angle combined with the fuzzy degree of nearness to identify the short circuit current and inrush current of transformers.To the waveform of ideal interval fault,the area of any half cycle is one-half of the area of complete alternation.However,the inrush current waveform has not the feature because of the dead angle.The results of theoretical analysis and dynamic simulation show that the method mentioned here can identify the short circuit cur...

关 键 词：间断角原理 模糊贴近度 变压器 故障电流 励磁涌流 

分 类 号：TM407[电气工程—电器]