摘要
该文主要探究兼容分布式电源的直流配电系统运行控制技术,旨在提升直流配电网的电压稳定性和运行可靠性。以直流配电系统中的并网接口作为控制对象,在并网接口中设计三相VSC变换器和DC/DC变换器,均采用电流与电压的双闭环控制策略。在交流负载侧采用恒压恒频控制,满足直流配电网向交流电网供电的需要。仿真结果表明,并网接口的VSC变换器和DC/DC变换器直流侧输出电压在启动1.5 s后达到设定值并且维持稳定,系统动态响应性能良好;交流负载侧电压的幅值和频率恒定,稳定输出220 V交流电压,保证直流配电系统的可靠运行。
This paper mainly explores the operation control technology of DC distribution system compatible with distributed power supply,in order to improve the voltage stability and operation reliability of DC distribution network.Taking the grid-connected interface of DC distribution system as the control object,three-phase VSC converter and DC/DC converter are designed in the grid-connected interface,both of which adopt the double closed-loop control strategy of current and voltage.Constant voltage and constant frequency control is adopted on the AC load side to meet the needs of DC distribution network to supply power to AC network.The simulation results show that the DC-side output voltage of VSC converter and DC/DC converter with grid-connected interface reaches the set value and remains stable after 1.5s start-up,and the dynamic response performance of the system is good;the amplitude and frequency of AC load side voltage are constant,and the output voltage of 220V AC is stable,which ensures the reliable operation of DC distribution system.
出处
《科技创新与应用》
2024年第29期178-180,184,共4页
Technology Innovation and Application
关键词
兼容分布式电源
直流配电系统
变换器
并网接口
控制模块
compatible distributed power supply
DC distribution system
converter
grid-connected interface
control module
