摘要
针对分布式电源并网发电的现状,提出一种将3台单相逆变器通过三角形连接方式来组成三相并网发电系统的新构想。应用此拓扑结构可以使3台单相逆变器的直流电源侧采用不同的分布式电源,如太阳能电池板、风机或者燃料电池等。同时,通过对系统电压和电流空间矢量的理论分析和计算,获取了系统全功率因数运行的并网控制策略,并针对并网运行过程中常见的现象,如电网电压和发电源发电量突变、由于功率器件的损坏造成的开路和电网短路故障等情况,进行了仿真研究。仿真结果表明,该系统具有高功率因数运行、高可靠性和稳定性等实用性特点。
A three-phase grid-connected generation system is presented,which applies three single-phase inverters connected in delta structure and adopts different power sources for their DC power supply,such as photovohaic cell,windmill or fuel cell. By the space vector analysis and calculation of system voltage and current,the cutting-in control strategy to operate with full power factor is studied. The phenomena frequently happened during cutting-in operation are simulated, such as grid voltage sudden change,power generation sudden change,power device damage,short/open circuit faults. The results show that,the presented system has higher power factor,reliability and stability.
出处
《电力自动化设备》
EI
CSCD
北大核心
2009年第10期59-63,共5页
Electric Power Automation Equipment
基金
国家重点基础研究发展计划项目(973项目)(2005CB221505)~~
关键词
分布式电源
并网发电
逆变器
并网控制
功率因数
distributed generation
grid- connected generation
inverter
cutting- in control
power factor
