电压源型虚拟同步发电机控制策略

Voltage Source Type Virtual Synchronous Generator Control Strategy

新能源发电在电力系统中渗透率的不断提升给电力系统稳定性带来了影响.为了提高电力系统稳定性,本文研究和讨论了电压源型虚拟同步发电机控制策略.利用同步发电机的转子运动方程、一次调频调压特性,虚拟同步机的'惯量',建立电压源型虚拟同步发电机的数学模型,研究了电压源型虚拟同步发电机有功/频率动态响应特性,并分析了主要控制参数对系统稳定性及动态响应的影响.仿真和实验表明,电压源型虚拟同步发电机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.

The continuous increase in the penetration rate of new energy power generation in power systems has had an impact on the stability of power systems.In order to improve the stability of power system,this paper studies and discusses the control strategy of voltage source virtual synchronous generator.By using the rotor motion equation of synchronous generator,the primary frequency regulation and voltage regulation characteristics,the inertia of the virtual synchronous machine,the mathematical model of the voltage source virtual synchronous generator is established,and the active/frequency dynamic response characteristics of the voltage source virtual synchronous generator are studied.And analyzed the impact of the main control parameters on system stability and dynamic response.The simulation and experiments show that the voltage source type virtual synchronous generator is equivalent to a synchronous generator in terms of external characteristics,and has good frequency modulation and voltage regulation performance,which can well adapt to the operation requirements of the power grid.