一种双馈风电机组一次调频协调控制策略研究

针对风电机组不主动参与系统一次调频的问题,分析风电机组转子动能控制与桨距角调频的控制原理与技术特点,利用2种调频方式在响应与支撑时间上的互补关系,提出一种转子动能与桨距角协调控制的组合调频方法,优化限功率状态下风电机组一次调频性能。设计风电机组一次调频曲线,并进行一次调频控制系统设计。搭建某2.0 MW双馈风电机组Bladed+Matlab联合仿真模型,进行一次调频全过程动态仿真,验证控制策略的正确性与有效性。在2.0 MW大容量机组上进行现场试验研究,试验结果支持理论分析和仿真结果。

A COLLABORATIVE CONTROL OF PRIMARY FREQUENCY REGULATION FOR DFIG-WT

Wind Turbines(WT)have seldom participated in Primary Frequency Regulation(PFR)in the power system initiatively. The principles and properties of PFR based on rotor kinetic energy and pitch control for Doubly-Fed Induction Generator Wind Turbine(DFIG-WT)are analyzed respectively. As those two methods have complementary relationships in response and supporting time,a collaborative PFR control strategy is developed to optimize the PFR performance of the DFIG-WT in power constrained operation status. Moreover,A droop control curve and the PFR control system for DFIG-WT are designed. Then a Bladed and Matlab co-simulation system of a 2.0 MW DFIG-WT is established to emulate the whole PFR process. Finally,a filed test is carried out on a 2.0 MW DFIG-WT by a large capacity grid emulator for the first time,and the test results demonstrate the analysis and simulation.