电力系统保护与控制Issue(16)：7-13,7.
独立型微电网中基于虚拟阻抗的改进下垂控制
An improved droop control strategy based on virtual impedance in islanded micro-grid
鲍薇 1胡学浩 1李光辉 1鲍威宇2
作者信息
- 1. 中国电力科学研究院，北京 100192
- 2. 山东大学电气工程学院，山东 济南 250002
- 折叠
摘要
Abstract
Due to the neglect of the impact of feeder impedance, the conventional droop control may result in instability and errors in proportional load sharing when implemented in islanded micro-grid. The inherent limitations of the conventional droop control are analyzed, and it is pointed out that the inverse proportion between the feeder impedance and the rated capacity is the necessary and sufficient condition for the power sharing; then an improved droop control based on virtual impedance is proposed to achieve accurate proportional load sharing, in which virtual impedance is introduced to reduce the power coupling brought by the resistance components of the feeder impedance model and an additional improved voltage/reactive power control is proposed to eliminate reactive power sharing errors caused by imbalanced line impedance. Accurate power sharing can be achieved and the load voltage can be maintained within the desired range by the proposed control strategy. Simulation results are provided to verify the analysis and design.关键词
独立型微电网/下垂控制/线路阻抗/功率均分/虚拟阻抗Key words
islanded micro-grid/droop control/feeder impedance/power sharing/virtual impedance分类
信息技术与安全科学引用本文复制引用
鲍薇,胡学浩,李光辉,鲍威宇..独立型微电网中基于虚拟阻抗的改进下垂控制[J].电力系统保护与控制,2013,(16):7-13,7.
