摘要
储能功率调节系统在典型可再生能源微网离网运行、并网运行及无缝切换运行过程中起决定性支撑作用。提出一种基于共逆变侧电感电流内环、外环软切换的双环无缝切换控制策略,实现储能功率调节系统在多种运行模式间的平滑转换。储能功率调节系统在离网模式下采用逆变侧电感电流内环、电容电压外环的双环控制策略;在并网模式下采用逆变侧电感电流内环、并网侧电感电流外环的双环控制策略。实验结果证明了上述无缝切换策略的有效性。
Energy storage system plays a significant role in the process of islanded operation, grid connected operation and seamless transfer operation among the typical microgrid.A novel seamless transfer control strategy is proposed with generic inner inverter-side current loop and soft switching outer loop, which achieves smooth mode switching of power conversion system.A dual-mode energy storage power conversion system based on LCL filter is utilized.In the islanded mode, a double-loop based on inner loop of inverter-side current and outer loop of capacitance voltage is adopted. While in the grid connected mode, a double-loop based on inner loop of inverter-side current and outer loop of grid- side current is adopted.Experimental results are provided to validate the effectiveness of the proposed control strategy.
出处
《电力电子技术》
CSCD
北大核心
2016年第11期33-34,56,共3页
Power Electronics
基金
国家自然科学基金(51477067)~~
关键词
微网
功率调节系统
并/离网运行
无缝切换
microgRid
power conversion system
grid-connected/islanded operation
seamless transfer
