两级式三相光伏并网系统无功补偿控制  

Reactive Power Compensation Control for Two Stage Three-Phase Photovoltaic Grid-Connected System

作　　者：海广超 陈华[1] 金晓虎 

机构地区：[1]新疆大学电气工程学院,新疆乌鲁木齐830047

出　　处：《水力发电》2016年第1期89-92,共4页Water Power

摘　　要：光伏并网逆变器为最大限度利用太阳能,大部分情况下以接近单位功率因数运行,逆变器控制功能单一。为提高光伏发电系统的并网能力,同时对本地负载进行无功补偿,节约无功补偿设备的投资,改进了三相瞬时无功电流检测方法,使光伏并网逆变器能够在光伏发电的同时进行无功补偿。并网逆变器模型为电压型电流源方式并网,逆变器控制方法采用双闭环瞬时矢量控制技术。仿真结果表明了该方法可提高光伏发电系统接入电网的能力。The output power of photovoltaic grid connected inverter usually operates close to unity power factor for the maximum utilization of solar energy, and the inverter control function is single. In order to improve the ability of grid connected photovohaic power generation system, provide reactive power compensation to local load and save investment of reactive compensation equipment, the three-phase instantaneous reactive current detection method is improved and the photovoltaic grid connected inverter has additional functions of reactive power compensation. The grid connected inverter is a voltage-type current source mode and the control method adopts double closed-loop instantaneous vector control technology. The simulation results show that the proposed method can improve the ability of photovoltaic power generation system to access the network.

关 键 词：光伏并网逆变器 无功补偿控制 瞬时电流检测 双环控制 

分 类 号：TM615[电气工程—电力系统及自动化]