Differential DC Component Suppression in Three-phase Non-isolated Connected Inverter

JIANG Junqi; YUAN Xiaoping

doi:10.14044/j.1674-1757.pcrpc.2018.01.025

您当前的位置：

首页 >

文章列表页 >

Differential DC Component Suppression in Three-phase Non-isolated Connected Inverter

更新时间：2024-09-14

- Differential DC Component Suppression in Three-phase Non-isolated Connected Inverter
- POWER CAPACITOR & REACTIVE POWER COMPENSATION Vol. 39, Issue 1, Pages: 132-137(2018)
- 作者机构：
  
  1. 吴中开放大学
  2. 中国矿业大学信息与电气工程学院
- 作者简介：
- 基金信息：
- DOI：10.14044/j.1674-1757.pcrpc.2018.01.025
  CLC： TM464
- Published：2018，
- 稿件说明：
移动端阅览
[1]蒋俊祁,袁小平.三相无隔离并网逆变器差模直流分量抑制[J].电力电容器与无功补偿,2018,39(01):132-137.

JIANG JUNQI, YUAN XIAOPING. Differential DC Component Suppression in Three-phase Non-isolated Connected Inverter. [J]. Power capacitor & reactive power compensation, 2018, 39(1): 132-137.
[1]蒋俊祁,袁小平.三相无隔离并网逆变器差模直流分量抑制[J].电力电容器与无功补偿,2018,39(01):132-137. DOI： 10.14044/j.1674-1757.pcrpc.2018.01.025.

JIANG JUNQI, YUAN XIAOPING. Differential DC Component Suppression in Three-phase Non-isolated Connected Inverter. [J]. Power capacitor & reactive power compensation, 2018, 39(1): 132-137. DOI： 10.14044/j.1674-1757.pcrpc.2018.01.025.

摘要

近年来分布式并网发电受到越来越多关注

抑制直流分量注入电网是并网系统必须解决的首要问题

直流分量可分为共模直流分量和差模直流分量。通常使用工频变压器实现直流分量隔离

然而变压器增加了系统的成本、体积和损耗

在无隔离并网系统中

理论上逆变器通过精确地控制可以使输出电流差模直流分量为零。实际上由于闭环系统中测量误差（包括模数转换误差、传感器测量误差）等原因

逆变器输出电流中包含差模直流分量。本文通过与基于瞬时无功功率理论的谐波检测抑制差模直流分量的方法对比

提出了采用滑动平均滤波器来检测输出电流中差模的直流分量

然后将其反馈到系统中进行闭环控制

从而使得差模直流分量达到允许的范围。搭建了40 kW的仿真和实验平台

证明了该方法的有效性。

Abstract

With the growing popularity of distributed generation in recent years

the problem of suppressing DC component to inject into the grid connect system must be solved firstly. DC component is divided into common mode and differential mode. The isolation of DC component is normally achieved by the use power frequency transformer. However

the transformer increases the system cost

size and loss. In the Nonisolation grid-connected system

the inverter can in theory keep the differential DC component of output current to zero by way of accurate control. In fact

the differential DC component is included in the output current of inverter due to such reasons as measurement error in the loop system（including modulus transfer error and the measurement error of sensor）. In this paper

the use of moving average filter is proposed to detect the differential DC component of the output current by the comparison with the harmonic detection suppression differential DC component method based on instantaneous reactive power theory

then it is fed to the system for loop ring control

thus keeping the differential DC component reach the permitted range.The 40 kW simulation and experimental platform is set up and the effectiveness of the method is proved.

关键词

并网逆变器无隔离变压器瞬时无功功率理论滑动平均滤波

Keywords

grid-connected inverternon-isolated transformerinstantaneous reactive power theorymoving average filter

references

Views

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Comprehensive Analysis of Harmonics of Photovoltaic Grid-connected Inverter System

Study on the Control Strategy of Grid-connected Inverter Based on Complex Control

Study on the Design of LCL Filter and Its Active Damping Strategy of Three-phase Grid-connected Inverter

Study on PV Grid-connected Inverter Control Based on Virtual Resistance Harmonic Suppression

Study on Parametric Optimization of LCL Filter of Grid-connected Inverter Based on Nonlinear Programming Genetic Algorithm

Related Author

ZHANG Mengru

DU Peng

GAN Jingfu

YAN Kun

KANG Jinsong

XIA Wei

QIU Lin

郭利辉

Related Institution

State Grid Jibei Electric Power Co., Ltd., Tangshan Power Supply Company

Shandong University

Huazhong University of Science and Technology

Department of Electronics and Information Engineering,Tongji University

Electromechanical)Engineering,Xuchang University

⁰