基于虚拟惯量和频率下垂控制的双馈风电机组一次调频策略

摘要

针对双馈风电机组(DFIGs)不具备调频控制能力的问题,设计 DFIG 一次调频控制策略,实现了 DFIG 参与电网一次调频.研究 DFIG 功率控制原理和频率响应过程,并考虑虚拟惯量、频率下垂控制对应的响应时间尺度不同,提出基于虚拟惯量和频率下垂控制的 DFIG 一次调频策略,增强了 DFIG 应对频率变化时的暂态和稳态功率调节能力.基于 RT-LAB 软件搭建了DFIG频率响应控制的半实物仿真平台,仿真与实测结果验证了该方法能够有效提高DFIG电网频率适应性.%A doubly-fed induction generator (DFIG) primary frequency control strategy was designed for the problem that DFIG does not have the ability of frequency regulation, to achieve participation in primary frequency process of the grid. The power control principle and frequency response process of DFIG were analyzed. Considering different response time scales of virtual inertia and primary frequency regulation, a DFIG primary frequency regulation strategy was proposed based on virtual inertia and frequency droop control, which could improve the transient and steady-state power regulation abilities of DFIG to response the frequency change. DFIG frequency response control semi-physical simulation platform was built in RT-LAB simulation software. The simulation and experimental results show that the proposed method effectively improves the DFIG grid frequency adaptability.