摘要
基于虚拟同步发电机算法设计了频率和电压控制器,推导出虚拟同步发电机的下垂特性方程,给出功率解耦及均分控制的理论依据,并对虚拟同步电抗的引入所带来的负荷端电压跌落问题进行了研究,利用下垂特性曲线说明了线路阻抗对无功负荷分配精度的影响,提出从电压控制器参考输入端补偿的改进控制策略。Matlab仿真结果验证了所提控制策略的有效性。
Frequency and voltage controllers were designed based on the virtual synchronous generator(VSG) algorithm,from which the droop characteristic of VSG was derived.The theoretical basis of power decoupling and load share was given.The load-side voltage droop produced by virtual synchronous reactance was studied,and the impact on reactive load distribution of line impedance was analyzed through the droop characteristic curve.An improved control strategy based on the reference input compensation of voltage controller was proposed.The Matlab simulation results show the effect of the proposed control strategy.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2013年第S1期401-406,共6页
Journal of Central South University:Science and Technology
基金
国家重点基础研究发展计划项目(2010CB736005)
国家高技术研究发展计划项目(2012AA050215)
科技部科研院所技术开发研究专项(2011EG113287)
关键词
微电网
负荷分配
虚拟同步发电机
解耦控制
电压跌落
microgrid
load distribution
virtual synchronous generator
decoupled control
voltage droop
