电工技术学报2012，Vol.27Issue(2)：217-222,6.
分布式发电系统无缝切换控制策略
Study of Control Strategy for Seamless Transfer of Grid-Connected Distributed Generation Systems
摘要
Abstract
The dual-mode inverters for distributed generation （DG） systems can operate in grid-connected and stand-alone mode. When the DG transfer the mode between the grid-connected and stand-alone mode, the control mode changes between the voltage control in stand-alone mode and current control in grid-connected mode. The key technology of dual-mode inverter is to achieve the seamless transfer and reduce the impact of current and voltage. During process of the transfer, the traditional seamless transfer control algorithm neglect non-synchronization of two kinds of transition, which address the issue of seamless transition assuming the work mode switching and control mode switching at the same time to complete. If ignoring the situation, it will cause voltage and current overshoot, which is unfavorable to power grid and load. After the transfer transient is detailed analyzed, this paper presents a voltage and current weighted control strategies without increasing system complexity. The strategy can ensure that the switching tr~insient variables can be controlled to reduce the impact of voltage and current, and achieve seamless transfer. Simulations and experiments results verify the availability and correctness of the proposed method.关键词
双模式/无缝切换/并网/脱网Key words
Dual-mode/seamless transfer/grid-connected/off-grid分类
信息技术与安全科学引用本文复制引用
王晓寰,张纯江..分布式发电系统无缝切换控制策略[J].电工技术学报,2012,27(2):217-222,6.基金项目
国家自然科学基金 （）
秦皇岛市科学技术与发展计划（201001A079）资助项目 （）
