摘要
基于罗氏线圈的电子式电流互感器在智能电网中已经得到了广泛的应用。提出了基于罗氏线圈微分输出的行波波头识别新方法。实现行波测距的关键在于精确提取行波浪涌的突变点,而罗氏线圈可以直接给出一次信号的微分信号;因此,直接利用其输出的微分行波信号进行判断,提高行波信号的识别能力。构建了仿真电路并进行了验证,表明罗氏线圈输出的微分信号在突变点的变化较一次电流行波更为明显,对双端和单端行波故障测距法的仿真结果表明测距结果准确。
Given that the electronic current transducer based on the Rogowski coil has been widely applied in the power system, this paper presents a travelling wave front identification method based on differential characteristics of the Rogowski coil.The key to realize the fault location is to obtain break-points of the travelling wave surge accurately,especially in the initial surge. The output of the Rogowski coil is a differential signal,which can be directly used for identifying the surge's mutation point to improve the ability to identify travelling waves.The results of the verification of the method by the simulation as built suggest the differential signal the Rogowsky coil outputs changes at the mutation point more obvious than the primary current travelling wave. The simulation results for the single-end and double-end fault location show that the distance measurement is correct and precise.
出处
《电网与清洁能源》
北大核心
2015年第6期12-14,20,共4页
Power System and Clean Energy
关键词
电子式互感器
罗氏线圈
行波
electronic transducer
Rogowski coil
traveling waves
