摘要
电力电子逆变器作为分布式电源或能量再生回馈系统与微网交互的载体,其控制方法受到了广泛的关注。为了解决该应用场景下逆变器的低阻尼、低惯量缺陷,降低负载波动对微网造成的冲击,将模糊控制与虚拟同步发电机(VSG)技术相结合,提出了基于模糊控制的VSG转动惯量自适应算法。通过分析转动惯量与频率变化的对应关系,建立模糊控制规则,使虚拟转动惯量的值周期最优以改进功频控制的抗干扰性。采用Simulink仿真,验证了提出的算法可有效提高逆变器输出电压频率在微电网孤岛运行条件下的抗干扰性,降低功率波动幅值并优化功率调整动态性能。
As a carrier for the interaction between distributed power or energy regeneration feedback system and microgrid,the control method of power electronic inverter has received widespread attention.In order to solve the low damping and low inertia defects of this type of inverter and reduce the impact of load fluctuations on the microgrid.Fuzzy control with virtual synchronous generator(VSG) technology are combined,an adaptive algorithm for the moment of inertia of VSG based on fuzzy control is proposed.By analyzing the corresponding relationship between the moment of inertia and the frequency change,a fuzzy control rule is established to optimize the value period of the virtual moment of inertia to improve the anti-interference performance of the power frequency control.Simulink simulation is used to verify that the proposed algorithm can effectively improve the anti-interference performance of inverter output voltage and frequency under microgrid island operation conditions,reduce the power fluctuation amplitude and optimize the dynamic performance of power adjustment.
作者
张涛
郑家琪
王福东
陈希有
ZHANG Tao;ZHENG Jia-qi;WANG Fu-dong;CHEN Xi-you(Dalian University of Technologyt Dalian 116024,China;不详)
出处
《电力电子技术》
CSCD
北大核心
2021年第1期40-44,共5页
Power Electronics
基金
国家重点研发计划(2017YFB1301104)
国家自然科学基金(91648204)。
关键词
逆变器
虚拟同步发电机
模糊控制
inverter
virtual synchronous generator
fuzzy control
