不等容量微源逆变器改进自适应下垂控制策略
Improved Adaptive Virtual Impedance Droop Control for Different Capacities
肖磊 1吴迪 1王在福 1李明阳1
作者信息
- 1. 江苏海洋大学,江苏 连云港 222005
- 折叠
摘要
分布式电源经过不同容量的逆变器介入孤岛微电网时,需要考虑逆变器功率分配、电压和电流的稳定性问题.提出通过两台逆变器的无功功率偏差动态调节虚拟阻抗值,来解决由于线路阻抗不一致导致的功率均衡问题.并重新设计功率控制环,在实际功率和给定功率的偏差后增加积分环节,通过动态调节下垂系数使频率和电压能随着系统的运行自我调节.所提策略可以迅速实现功率合理分配、频率和电压的自愈.最后在MATLAB平台搭建仿真模型,验证本策略的可行性.
Abstract
When a distributed power source intervenes in an island microgrid through inverters of different capaci-ties,it is necessary to consider the stability of inverter power distribution,voltage and current.This paper proposes to dynamically adjust the virtual impedance through the reactive power deviation of the two inverters to solve the problem of power equalization caused by inconsistent line impedance.The power control loop is redesigned,and the integration link is added after the deviation between the actual power and the given power,and the frequency and voltage can be self-adjusted with the system operation by dynamically adjusting the droop coefficient.The strategy proposed in this paper can quickly realize the reasonable distribution of power,and self-healing of frequency and voltage.Finally,a simulation model is built on the MATLAB platform to verify the feasibility of this strategy.
关键词
下垂控制/孤岛微电网/自愈能力/功率均衡Key words
Droop control/Island microgrid/Self-healing ability/Power balance引用本文复制引用
基金项目
国家自然基金青年基金项目(51707078)
江苏省高校自然科学基金面上项目(20KJB70027)
出版年
2024
NETL
NSTL
维普
万方数据