摘要
为研究输入电压波动对多并网逆变器稳定性的影响,对输入电压波动时多并网逆变器的稳定性进行仿真研究,建立三相LCL型并网逆变器的数学模型,推导出并网逆变器输入电压和并网电压、电流的关系,用MATLAB中的Simulink仿真工具搭建三相LCL并网逆变器仿真模型和三台并网逆变器并联的仿真模型,研究输入电压的突变对并网逆变器稳定性和并网电能质量的影响,探讨通过调节LCL滤波器参数来提高单台和多台并网逆变器接入电网的稳定性和电能质量的效果。仿真结果表明:输入电压的突变会降低多并网逆变器的稳定性和并网电能质量,调节LCL滤波器参数可以有效提高多并网逆变器的稳定性和并网电能质量。
In order to study the influence of input voltage fluctuations on the stability of multi-grid-connected inverters,the stability of multiple grid-connected inverters under input voltage fluctuations is simulated and studied.The mathematical model of three-phase LCL grid-connected inverter is established.The relationship between the input voltage of the grid-connected inverter and the grid-connected voltage and current is derived.The Simulink simulation tool in MATLAB is used to build a three-phase LCL grid-connected inverter simulation model and a simulation model of three grid-connected inverters connected in parallel.The influence of sudden changes in input voltage on the stability of grid-connected inverter and grid-connected power quality is studied.The effect of improving the stability and power quality of single and multiple grid-connected inverters connected to the grid by adjusting the parameters of the LCL filter is discussed.The simulation results show that:1)sudden changes in input voltage can reduce the stability of multiple grid-connected inverters and the quality of grid-connected power;2)adjusting LCL filter parameters can effectively improve the stability of multiple grid-connected inverters and the quality of grid-connected power.
作者
谢玲玲
孙昌茂
陆柳
龚仁喜
XIE Ling-ling;SUN Chang-mao;LU Liu;GONG Ren-xi(School of Electrical Engineering, Guangxi University, Nanning 530004, China)
出处
《广西大学学报（自然科学版）》
CAS
北大核心
2020年第5期1154-1162,共9页
Journal of Guangxi University（Natural Science Edition）
基金
国家自然科学基金资助项目(61863003,61561007)
广西自然科学基金资助项目(2019GXNSFAA245019)。
关键词
时变输入电压
并网逆变器
稳定性
电能质量
time-varying input voltage
grid inverter
stability
power quality
