一种功率动态调整的光伏逆变器调压方法  

A Voltage Regulation Method of Photovoltaic Inverter with Dynamic Power Regulation

作　　者：王加澍 马刚[1] 仲泽天 张健[1] 李梦月 吕潇 WANG Jiashu;MA Gang;ZHONG Zetian;ZHANG Jian;LI Mengyue;LÜ Xiao(School of Nari Electrical and Automation Engineering,Nanjing Normal University,Nanjing 210023,Jiangsu,China)

机构地区：[1]南京师范大学南瑞电气与自动化学院,江苏南京210023

出　　处：《电网与清洁能源》2020年第8期67-72,共6页Power System and Clean Energy

基　　金：国家自然科学基金(51607093);江苏省研究生科研与实践创新计划项目(KYCX20_1248)。

摘　　要：越来越多的光伏电源接入配电网,导致在光伏有功出力较大时并网点电压升高甚至越限,严重影响了配电网的安全。针对由于光伏并网造成的电压越限问题,文中分析了电压越限机理,研究传统无功调压策略;在此基础上,融合有功限值确定方法,提出了基于功率动态调整的光伏逆变器调压方法,不同工况下光伏逆变器采用相应控制策略,实现逆变器有功输出最大、无功输出最佳。通过仿真验证了调压方法的有效性。More and more photovoltaic power supplies are connected to the distribution network,which leads to the increase or even exceeding of the limit of the grid voltage when the photovoltaic active power is large,and seriously affects the safety of the distribution network.Aiming at the voltage over limit caused by photovoltaic grid connection,this paper analyzes the mechanism of voltage over limit and studies the traditional reactive voltage regulation strategy.On this basis,combining the method of determining the active power limit,a voltage regulation method of photovoltaic inverter based on dynamic power adjustment is proposed.Under different working conditions,the photovoltaic inverter adopts the corresponding control strategy to achieve maximum active power output and best reactive power output of the inverter.The effectiveness of the voltage regulation method is verified by simulation.

关 键 词：光伏逆变器 配电网 电压越限 自适应调压 

分 类 号：TM732[电气工程—电力系统及自动化]