应用于光伏电站的快速功率跟踪控制策略  

A Fast Power Tracking Control Strategy Applied into Photovoltaic Power Plant

作　　者：陶征[1] 米高祥[1] 李旭[1] 蒋顺平[1] TAO Zheng;MI Gao-xiang;LI Xu;JIANG Shun-ping(NR Electric Co.,Ltd.,Nanjing 211102,China')

机构地区：[1]南京南瑞继保电气有限公司,江苏南京211002

出　　处：《电力电子技术》2020年第10期137-140,共4页Power Electronics

基　　金：国网电力科学研究院有限公司科技项目(JS20-00369)。

摘　　要：提出一种光伏(PV)快速功率跟踪控制策略,先将站内所有的PV逆变器划分成样本型和普通型,样本型逆变器以最大自然发电功率运行,并将自身的电气参数传递给上层快速功率控制装置以获取潜在最大功率。普通型逆变器处于限功率状态,当收到上层装置发送的功率提升目标值后,将功率和直流电压指令值作为内部程序中电压环和电流环的参考值,到达对应的次最大功率点处再继续追踪运行。通过实验验证,该方法解决了常规算法功率调节速率慢的问题,实现了逆变器30 ms以内的功率双向调节,避免了逆变器因直流电压下降而脱网的风险,满足现场PV电站的快速性需求。A photovoltaic(PV)fast power tracking control strategy is proposed which firstly divides all PV inverter in the station into sample and ordinary types.The sample inverter operates at the maximum natural power generation,and its own electrical parameters are passed to the upper fast power controlling device to obtain the potential maximum power.The ordinary inverter is in a power-imited state.After receiving the power boost target value sent by the upper device,the power and DC voltage command values are used as the reference values of the voltage and current loops in the internal program,and continues to track after reaching the corresponding second maximum power point.Through experimental verification,this method solves the problem of slow power regulation rate of the conventional algorithm,realizes the bidirectional power adjustment of the inverter within 30 ms,avoids the risk of the inverter being disconnected from the grid due to the DC voltage drop and meets the rapid requirements of onsite PV power plant.

关 键 词：逆变器 快速功率跟踪控制 光伏电站 

分 类 号：TM464[电气工程—电器]