摘要
并网/独立双模式运行逆变器由于具有较好的经济性,并能够不间断地为负载提供电能等优点,近年来成为研究的热点。提出了一种有效的并网与脱网过程的无缝切换方法。在并网过程中采用了先检测电网是否满足并网要求,继而进行幅值相位跟踪,最后合上并网开关并进行并网软启动,脱网则采用了零电流与零电压的脱网方法。该方法较易于采用数字化完成。仿真和试验结果证明,该方法可有效地实现并网和脱网的无缝切换过程。
The inverter operating at two mode of grid-connection and standing alone,which has the merits of flexibility, high reliability and economy has been thought much.This paper proposes an effective seamless transfer method for standalone and grid-connection mode and this method is easy to achieve by digital control.The Grid-connection progress follows the steps：at first ,checking the grid is suitable for inverter grid-connection, and then adjusting the inverter frequency, phase and tracking the grid.After that, close the switch and let current soft start.The grid-disconnection uses the point of zero voltage and zero current method.The Simulative and experimental results certify the method to be effective.
出处
《电力电子技术》
CSCD
北大核心
2006年第5期56-57,共2页
Power Electronics
关键词
逆变器
电能/无缝切换
inverter
power energy / seamless transfer
