作者：王斌1,2, 刘维亭1
作者单位：1. 江苏科技大学电子信息学院, 江苏 镇江 212000;
2. 无锡赛思亿电气科技有限公司, 江苏 无锡 214000
关键词：并网逆变器;谐波含量;lclc滤波器;无源阻尼法;有源阻尼法
摘要：
在利用可再生能源进行并网发电的电力系统中，针对逆变器输出侧并网电流谐波含量较大，会对电网产生一定冲击的问题，提出一种基于三相并网逆变器的lclc型滤波器。该滤波器通过两个lc滤波器级联的方法，形成一个四阶的滤波器，并对滤波器采用基于电容电流采样的有源阻尼法，以实现逆变器输出侧并网电流谐波含量的降低和高阶滤波器谐振尖峰的抑制。通过仿真和实验验证，与传统的lcl型滤波器相比，该滤波器能有效地减小系统在谐振频率处的谐振尖峰，更好地提高系统抗干扰能力；采用的有源阻尼法同无源阻尼法相比，能更有效地降低系统损耗，保证电能的质量和电网稳定的运行。
research on lclc filter of three-phase grid-connected inverter
wang bin1,2, liu weiting1
1. school of electronic information, jiangsu university of science and technology, zhenjiang 212000, china;
2. wuxi silent electrical system technology co., ltd., wuxi 214000, china
abstract: in a power system that uses renewable energy for grid-connected power generation, in view of the large harmonic content of the grid-connected current at the output side of the inverter, which will have a certain impact on the grid, a three-phase grid-connected inverse is proposed. the lclc type filter of the converter. the filter adopts the method of cascading two lc filters to form a fourth-order filter, and the filter adopts the active damping method based on capacitive current sampling to realize the harmonic content of the grid-connected current at the output side of the inverter the reduction and suppression of resonance spikes in high-order filters. through simulation and experimental verification, compared with the traditional lcl filter, the filter can effectively reduce the resonant peak of the system at the resonant frequency, and better improve the anti-interference ability of the system. the active damping method used is the same. compared with the source damping method, the system loss can be reduced more effectively, and the power quality and the stable operation of the power grid can be ensured.
keywords: grid inverter;harmonic content;lclc filter;passive damping method;active damping method
2023, 49(6):122-129 收稿日期: 2021-12-14;收到修改稿日期: 2022-02-05
基金项目: 国家自然基金科学基金项目（51977101）；江苏省省重点研发计划产业前瞻性与共性关键技术重点项目（be2018007）
作者简介: 王斌(1993-),男,江苏徐州市人,硕士研究生,专业方向为电机控制
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