电流型光伏并网逆变器的关键技术研究  

The Key Technologies Research of Current-type PV Grid-connected Inverter

作　　者：郭鹏[1] 江智军[1] 胡炜[1] 

机构地区：[1]南昌大学信息工程学院,南昌330031

出　　处：《电测与仪表》2011年第7期55-60,共6页Electrical Measurement & Instrumentation

摘　　要：由于光伏并网逆变器是太阳能光伏并网发电系统的核心部分,它分为电压型和电流型两种逆变器。针对目前使用最为广泛的电压型光伏并网逆变技术存在着众多的缺陷,本文介绍了一种基于电流源特性的电流型光伏并网逆变器。该装置利用了导抗变换器和采用直接电流双环控制与同步锁相环相结合的综合控制策略,实现了光伏系统电流型并网的目的。采用电流型光伏并网逆变器提高了光伏发电系统的效率,同时具有减小装置系统的体积、节约成本和并网电流受电网的影响小等一系列优点。As the photovoltaic connected grid inverter is the core of the PV Generation system,it is divided into two kinds of voltage and current-type inverter.In the light of the existence of many defects of the most widely used type of photovoltaic voltage-type inverter technology,the article introduces a current–type photovoltaic grid-connected inverter based on the current source characteristics.The inverter uses the impedance converter and direct current double loop control with synchronization PLL integrated control strategy to achieve current-type PV grid-connected system.There are lots of advantages by current-type photovoltaic inverter,such as the efficiency of photovoltaic power generation systems is improved,while the volume of the unit system is reduced,cost savings,and current of grid-connected is little affected by the power grid.

关 键 词：光伏并网 电流型逆变器 导抗变换器 双环控制 锁相环 

分 类 号：TM464[电气工程—电器]