摘要
在太阳能发电系统中,由于负载接入的不同,太阳能并网过程中电网产生大量的谐波和无功电流。根据光伏并网逆变器与有源电力滤波器的特性,将两者进行统一协调控制,这样不仅有利于拓展光伏并网系统的应用,还可以节省谐波与无功补偿设备的投资。再者提出了一种改进型的PI+重复控制策略算法,对系统中的电流谐波进行消除,并在此基础上搭建系统的仿真模型对系统在光伏并网发电且有源电力滤波状态进行了仿真,验证系统的THD降低到标准范围内,说明该控制策略的有效性。
In the solar power generation system,due to the different load access,the grid generates a large number of harmonics and reactive currents during the solar grid connection process.According to the characteristics of photovoltaic grid connected inverter and active power filter,the two are controlled in a unified and coordinated way,which is not only conducive to expanding the application of photovoltaic grid connected system,but also can save the harmonic and reactive compensation equipment investment needs.Moreover,an improved PI+repetitive control strategy algorithm is proposed to eliminate the current harmonics in the system.On this basis,a simulation model of the system is built to simulate the state of the system in photovoltaic grid-connected power generation and active power filtering.Through simulation,the THD of the system is reduced to the standard range,which shows the effectiveness of the control strategy.
作者
王鹏
WANG Peng(Department of Information Engineering,Gansu Vocational and Technical College of Communication,Lanzhou 730050,China)
出处
《电工技术》
2021年第10期61-64,共4页
Electric Engineering
基金
国家自然科学基金项目(编号51267012)。
关键词
光伏发电系统
无功电流
统一协调控制
光伏并网
谐波畸变率
photovoltaic power generation system
reactive current
unified coordinated control
photovoltaic grid connection
harmonic distortion rate
