基于虚拟同步发电机的逆变电源控制策略研究.pdfVIP

学兔兔 第52卷 第2期 电测与仪表 V0I．52 No．2 2015年 1月25日 Electrical Measurement Instrumentafion Jan．25，2015 基于虚拟同步发电机的逆变电源控制策略研究 徐湘楚，朱凌，郭本峰 (华北电力大学新能源电力系统国家重点实验室，河北保定071003) 摘要：针对采用常规下垂控制方法的逆变电源存在稳定时电压和频率的偏移，不能完全满足电网运行要求的问 题，采用了一种新的逆变电源控制方法即虚拟同步发电机(VSG)控制策略。建立了虚拟同步发电机的模型，参 考同步发电机控制理论，重点设计了功频控制器和励磁控制器，搭建了以大容量汽轮发电机模拟电网的逆变器 并网发电系统。通过Matlab／Simulink仿真验证了虚拟同步发电机中转动惯量的作用和虚拟同步发电机的并 网调节特性，仿真结果表明，基于虚拟同步发电机的逆变电源在外特性上近似等效为一个同步发电机，具有良 好的调频调压性能，能很好地适应电网的运行要求。 关键词：虚拟同步发电机；转动惯量；功频控制器；励磁控制器；调频调压 中图分类号：TM464 文献标识码：A 文章编号：1001。1390(2015)02-0080-05 Research on the control strategies of inverters based on the virtual synchronous generator Xu Xiangchu，Zhu Ling，Guo Benfeng (State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources， North China Electric Power University，Baoding 071003，Hebei，China) Abstract：Voltage and frequency deviation occur in the steady state in the inverters which adopts the conventional droop control method，which cannot completely meet the requirement of the grid operation．In view of this problem，a new control strategy of inverters called virtual synchronous generator(VSG)was adopted in this paper．A virtual syn— chronous generator model was established，a power~equency controller and an excitation controller were designed based on the control theory of the synchronous generator，and an inverter grid—connected power—generating system was constructed，which used a large capacity steam turbine generator to simulate the grid．The function of the rotational in— ertia and the