摘要
首先介绍了传统同步发电机(SG)的数学模型;其次设计虚拟同步发电机(VSG)控制策略的算法,即将逆变装置等效成发电机的数学模型;然后根据SG频率-有功功率、电压幅值-无功功率下垂特性,设计虚拟调速系统和虚拟励磁控制系统;最后在MATLAB/Simulink环境中建立基于VSG控制的逆变器仿真模型。仿真结果表明,基于VSG控制的逆变器可以模拟出SG大转动惯量、下垂特性、功率输出特性等特点,验证了VSG控制策略的可行性。
Firstly,mathematical model of synchronous generator was introduced. Then,virtual synchronous generator algorithm was designed,and the inverter can imitate the mathematical model of synchronous generator. The virtual speed regulation system and virtual excitation control system were also designed according to frequency-active power sag and voltage amplitude-reactive power sag of synchronous generator. Finally,the simulation model of inverter based on virtual synchronous generator control was established in MATLAB/Simulink. The simulation results show that the inverter based on virtual synchronous generator control can be regarded as a generator with large inertia,drooping characteristics and frequency regulation characteristics. The feasibility of virtual synchronous generator control strategy was verified.
作者
谢桦
张晓晨
李娜
XIE Hua;ZHANG Xiaochen;LI Na(Department of Electrical Engineering, Beijing Jiaotong University, Beijing 100044, China;Smart Grid and Renewable Energy Reseal~h Group, North China Electric Power Reseal~h Institution, State Grid Coqooration of China, Beijing 100045, China)
出处
《电器与能效管理技术》
2018年第8期43-48,共6页
Electrical & Energy Management Technology
基金
国网冀北电科院(0109-300009250-00105)
关键词
分布式电源
逆变器
虚拟同步发电机控制
调频
distributed generation
inverter
virtual synchronous generator control
frequency regulation
