光伏逆变器低电压穿越控制策略研究  

Study on Low Voltage-ride-through Control Strategy of Photovoltaic Inverter

作　　者：纪竹童 周娜娜 赵品 封海东 

机构地区：[1]浙江大学工程师学院,浙江杭州310000 [2]山东诚海电子科技有限公司,山东烟台264006 [3]山东蓝天电能科技有限公司,山东烟台264006

出　　处：《电力电容器与无功补偿》2017年第5期176-180,共5页Power Capacitor & Reactive Power Compensation

摘　　要：针对光伏逆变器在电网低电压穿越时会出现过压、过流的问题,提出了一种基于光储协调控制的策略。在低电压时间内,光伏逆变器采用最大功率跟踪控制,利用储能系统吸收多余的有功来解决装置过压的问题;对输出电流采取协调分配控制,不仅解决了过流问题,而且还可向系统提供一定的无功功率以便于系统电压恢复。As for the issue of overvoltage and overcurrent of PV inverter in the ride-through in the low vol- tage grid, a kind of strategy based on photovoltaic-energy storage hybrid System. During the low voltage time, the PV inverter adopts maximum power for the tracking and control, uses the energy system to absorb excessive active power to solve the overvohage problem of the device. Coordination distribution control is adopted for the current output so to not only solve the problem of overcurrent, but also to provide a definite reactive power to the system for the recovery of svstern voltage.

关 键 词：光伏逆变器 低电压穿越 DC-DC变换器 电流直接控制 

分 类 号：TM464[电气工程—电器]