单相光伏并网逆变器直流注入测量实验研究  

Study of Measurement Experiment of DC Injection for Single-phase Photovoltaic Grid-connected Inverter

作　　者：段文燕[1,2] 伞国成[1] 

机构地区：[1]燕山大学,电气工程学院,河北秦皇岛066004 [2]秦皇岛职业技术学院,河北秦皇岛066100

出　　处：《电力电子技术》2012年第11期10-11,共2页Power Electronics

摘　　要：直流注入是光伏系统并网运行时存在的问题之一。直流注入测量不仅可用于检测光伏逆变器并网电流是否满足IEEE Std,929-2000,还可通过适当控制,将检测到的直流量以大小相等、方向相反的形式叠加到并网电流中,消除并网电流中可能存在的直流分量。设计了一种基于定积分的直流注入数字化测量方案,分析了该方法的基本原理,研究了其数字化实现方法,并进行了基于DSPTMS320F2812平台的实验研究。实验结果表明,该方法可实现快速准确的直流注入测量。DC injection is one of the most important issues for grid-connected photovoltaic （PV） system.The of DC injection can be used to test if the grid current of the PV inverter complies with the IEEE Std.929-2000.It can be reversed and superimposed to the grid current to eliminate the potential DC injection.This paper presents a digital DC injection measurement method based on the definite integration.The basic principle is analyzed and the digital implementation of the proposed method is studied.The experiments based on the DSP TMS320F2812 platform are carried out.Results demonstrate that the proposed method can achieve fast and accurate measurement of DC injection.

关 键 词：逆变器 光伏并网 直流注入 

分 类 号：TM464[电气工程—电器]