直驱永磁风电机组虚拟惯量控制的实验方法研究

An Experimental Study Method of D-PMSG With Virtual Inertia Control

基于风电并网系统的数学模型及风电机组虚拟惯量控制的基本原理,提出一种直驱永磁风力发电机组虚拟惯量控制的实验研究及系统设计方法。实验系统涉及多台模拟风电机组,其中,风力机及电网部分基于特性模拟的方法实现,而永磁发电机及全功率变流器采用实际物理装置实现。模拟风电机组能够有效模拟兆瓦级风电机组的转矩响应特性、低转速特性及惯性响应特性,等值电网部分能够有效模拟实际电网的惯性响应特性及频率响应特性。风电机组是虚拟惯量控制研究的重点,为此特别给出了适用于虚拟惯量控制研究的模拟风电机组的设计及具体实现方法。构建了一套模拟风电并网实验系统进行测试,并通过与仿真结果进行对比,验证了提出的设计方法的有效性。

This paper presented an experimental study and experimental system design method of the directly-driven wind turbines with permanent-magnet synchronous generators（D-PMSG） with virtual inertia control based on the mathematical model of the wind power integrated system（WPIS） and the principle of virtual inertia control. In the experimental system, the part of wind turbines and the power grid was realized based on characteristic simulations, and the part of PMSG and the full-power converter used the actual physical devices. The simulated D-PMSG could effectively present the torque response characteristics, low-speed characteristics and inertia response characteristics of MW-level wind turbines, and the equivalent power grid could effectively simulate the inertia and frequency response characteristics of practical power grids. Due to the fact that the wind turbine is the key point of virtual inertial control study, a design and implementation method of the simulation wind turbine which can be applied to the virtual inertia control was proposed. A multi-machine simulation wind power integrated experimental system was built and experimental tests were performed. The proposed design method is validated to be effective by comparing with the simulation results.