一种带LC谐振单元的谐波抑制方法  

A harmonic suppression method with LC resonance block

作　　者：刘健犇 倪园 李妮 赵军 张业茂 LIU Jianben;NI Yuan;LI Ni;ZHAO Jun;ZHANG Yemao(State Key Laboratory of Power Grid Environmental Protection,China Electric Power Research Institute Wuhan Branch,Wuhan 430074,China)

机构地区：[1]中国电力科学研究院有限公司武汉分院电网环境保护国家重点实验室,武汉430074

出　　处：《中南民族大学学报（自然科学版）》2024年第6期765-771,共7页Journal of South-Central Minzu University(Natural Science Edition)

基　　金：国家电网有限公司总部科技资助项目(5400-202155352A-0-0-00)。

摘　　要：提出了一种带LC谐振单元的谐波抑制方法,将由电感和电容元件构成的串联谐振单元串接在系统进线端,与传统的无源电力滤波器配合使用.LC谐振单元对基波和谐波呈现不同等效电感值,对谐波呈现为大电感,增加系统谐波等效阻抗,迫使谐波流入无源电力滤波器;通过合适的参数设计,使LC谐振单元对基波也呈现为小电感,且该等效电感上消耗的无功功率等于或略大于无源电力滤波器提供的容性无功功率,从而实现在不补偿无功或消纳无功条件下抑制谐波.仿真验证了所提方法的有效性与正确性.A method of harmonic suppression with LC resonant block is proposed.The series resonant block composed of inductor and capacitor components is connected to the incoming line of the system in series,and it can be used together with the traditional passive power filter.The LC resonance element presents different equivalent inductance values for fundamental wave and harmonic wave,and it shows large equivalent inductance for harmonic wave,thus increasing the equivalent impedance of harmonic wave of the system and forcing harmonics into the passive power filter.By designing appropriate parameter,the LC resonant block can also appear as an small equivalent inductor to the fundamental wave,and the reactive power consumed on the equivalent inductor is equal to or slightly greater than the capacitive reactive power provided by the passive power filter,so harmonic suppression under the condition of no compensation or absorption of reactive power can be realized.Simulation results verify the effectiveness and correctness of the proposed method.

关 键 词：串联谐振 等效阻抗 谐波抑制 无功功率 

分 类 号：TM131.4[电气工程—电工理论与新技术] TN713[电子电信—电路与系统]