电流型光伏并网逆变器的关键技术研究

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...

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

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.