多耦合线圈混合谐波滤波器研究

Hybrid harmonic filter with multi-coupled coils

为了研究中高压电网中,混合有源滤波器的有源部分更为安全的接入方式,提出一种多耦合线圈混合谐波滤波器。基于多耦合线圈的无源滤波器用于滤除多次特征谐波,能够减小线圈组的占地面积。在多耦合线圈结构的基础上,增加了一个感应线圈,有源部分的电流流经感应线圈,并通过空间磁路耦合的方式注入电网,用以补偿无源部分补偿之后残余的谐波电流。有源部分和无源部分不需要直接连接,有源部分的开路、短路不影响无源部分的正常工作,安全可靠。分析了多耦合线圈混合谐波滤波器的结构和谐波补偿原理,介绍了其电流跟踪控制技术,搭建了仿真模型和实验平台,验证了所提出滤波器的有效性。本方案为解决电力系统谐波问题提供了更多的选择。

In order to study the safer access method of the active part of the hybrid active power filter in the medium and high voltage power grid,a hybrid harmonic filter was proposed with multi-coupled coils.The passive filter based on multi-coupled coils can filter out multiple characteristic harmonics and reduce the occupied area of the coil group.Based on the multi-coupled coils structure,an induction coil was added.The current of the active part flew through the induction coil and was injected into the power grid through spatial magnetic circuit coupling,to compensate the residual harmonic current after the passive part compensation.The active part and the passive part do not need to be connected directly,and the open circuit and short circuit of the active part do not affect the normal operation of the passive part,which is safe and reliable.Structure and harmonic compensation principle were analyzed,the current tracking control technology was introduced,the simulation model and experimental platform were built,and effectiveness of the proposed filter was verified.The solution provides more options for solving the harmonic problem in power system.