Common Mode Current Suppression Based on H5 Bridge PV Grid-connected Inverter

WANG Hengli; XU Mianqi; CHENG Guangfeng

doi:10.14044/j.1674-1757.pcrpc.2017.05.032

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Common Mode Current Suppression Based on H5 Bridge PV Grid-connected Inverter

更新时间：2024-09-14

- Common Mode Current Suppression Based on H5 Bridge PV Grid-connected Inverter
- POWER CAPACITOR & REACTIVE POWER COMPENSATION Vol. 38, Issue 5, Pages: 171-175(2017)
- 作者机构：
  
  空军94981部队
- 作者简介：
- 基金信息：
- DOI：10.14044/j.1674-1757.pcrpc.2017.05.032
  CLC： TM464;TM615
- Published：2017，
- 稿件说明：
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[1]王恒利,徐绵起,程光锋.基于H5桥拓扑光伏并网逆变器共模电流抑制[J].电力电容器与无功补偿,2017,38(05):171-175+180.

WANG HENGLI, XU MIANQI, CHENG GUANGFENG. Common Mode Current Suppression Based on H5 Bridge PV Grid-connected Inverter. [J]. Power capacitor & reactive power compensation, 2017, 38(5): 171-175.
[1]王恒利,徐绵起,程光锋.基于H5桥拓扑光伏并网逆变器共模电流抑制[J].电力电容器与无功补偿,2017,38(05):171-175+180. DOI： 10.14044/j.1674-1757.pcrpc.2017.05.032.

WANG HENGLI, XU MIANQI, CHENG GUANGFENG. Common Mode Current Suppression Based on H5 Bridge PV Grid-connected Inverter. [J]. Power capacitor & reactive power compensation, 2017, 38(5): 171-175. DOI： 10.14044/j.1674-1757.pcrpc.2017.05.032.

摘要

光伏并网发电是新能源开发利用的一个重点发展方向

其核心部件是并网逆变器

传统无隔离H桥逆变器无法抑制共模电流

本文研究了新型H5桥逆变器拓扑

与传统H桥逆变器相比

只增加了一个开关管

使得在续流阶段光伏模块和电网之间隔离

实现共模漏电流的抑制;设计了H5桥拓扑双L滤波器

提出了基于准比例谐振控制的双环控制策略;搭建了H5桥逆变器实验平台

验证了H5桥拓扑结构能有效地抑制共模电流

控制策略具有良好的动态和稳态性能

并网电流谐波小。

Abstract

The photovoltaic grid-connected power generation is a key development direction for thedevelopment and utilization of renewable energy and its core components are grid-connected inverter.Thetraditional non-isolation H5 inverter can not suppress and control the common mode current.In this paper

a new type of H5 bridge inverter topology is developed wich

compared to the traditional one

has only oneswitch tube added so to keep isolation between PV module and and power grid during the current flowingperiod and achieve suppression of the common mode leakge current.Double L filter of H5 bridge topology isdesigned and the double loop control strategy based on quasi proportiona reasonant control is proposed.Theexperimental platform of H5 bridge inverter is set up and it is demonstrated that the H5 bridge topologicalstructure can suppress effectively common mode current

the control strategy has good dynamic and staticperofrmance and the grid-connected current has small harmonic.

关键词

光伏并网逆变器H5桥拓扑共模电流准比例谐振

Keywords

photovoltaic grid-connected inverterH5 bridge topologycommon mode currentquasi proportional resonance

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Related Institution

College of Mechanical Engineering,North China University of Science and Technology

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