双馈风电机组虚拟惯量控制量化分析与参数优化整定

Quantitative Analysis and Parameter Optimization of Virtual Inertia Control for Doubly Fed Wind Turbine

风电机组虚拟惯量控制与锁相环、滤波器等环节交互耦合,各环节及参数对惯量响应特性的影响机理尚不明晰,不利于虚拟惯量控制优化与参数整定。为此,首先建立了考虑锁相环动态特性、滤波器带宽的双馈风电机组虚拟惯量附加控制详细状态空间模型,从系统稳定性与阻尼特性2个方面,量化锁相环参数、滤波时间常数、虚拟惯量系数对风电机组惯量响特性的影响与变化规律;在此基础上,从系统小干扰稳定、惯量时间常数、阻尼比角度出发,探讨了上述参数的优选取值范围,并提出了虚拟惯量关键参数优化整定方案。最后,在Matlab/Simulink中搭建了双馈风电机组接入无穷大电网仿真模型,仿真验证了理论研究与所提参数整定方案的合理性与有效性。

The virtual inertia control of the doubly fed wind turbine interacts with the phase locked loop,the filter and the other links.However,the influences of each of the link parameters on the inertia response characteristics are seldom known clearly,which is not conducive to the optimization of the virtual inertia control and the parameter tuning.For this reason,this paper firstly establishes a detailed state space model doubly fed wind turbines with virtual inertia control considering the dynamics of the phase-locked loop and the bandwidth of the filter.From the two aspects of the system stability and the damping characteristics,the influences and the change laws of the parameters of the phase-locked loop,the filter time constant,and the virtual inertia control coefficient on the inertia response characteristics of the wind turbines are quantified;On this basis,from the point of view of the small signal stability,the inertia time constant and the damping ratio of the system,the optimal value range of the above parameters is discussed,and the optimal tuning scheme of the virtual inertia control parameters is proposed.Finally,the simulation model of the doubly fed wind turbine connected to the infinite power grid is built in the Matlab/Simulink,based on which the rationality and effectiveness of the theoretical research and the proposed parameter tuning scheme are verified.