摘要
双馈风机机械与电气解耦,使得接入电网总有效转动惯量降低,增加电网频率调节压力。分析了双馈风机通过虚拟同步发电机控制实现对系统频率响应技术,研究了双馈风机在调频过程中在不同运行工况下能量变化评估方法,提出基于机组状态评估的双馈风机自适应虚拟同步发电机控制。在理论研究基础上进行时域仿真,结果表明,基于运行状态评估的双馈风机自适应虚拟同步发电机控制在不同出力水平下可以对系统频率提供有效支撑,提高系统频率稳定性,同时调频过程中保证机组运行稳定。
Because mechanical part of doubly fed induction generator（DFIG） is decoupled from electrical part, total equivalent rotary inertia of power system decreases with continuous growth of wind power penetration, bringing pressure to frequency regulation of power system. Firstly, frequency response control method of DFIG based on virtual synchronous generator control was analyzed in the paper. Secondly, energy change evaluation method of DFIG in process of frequency regulation was given. Then an adaptive virtual synchronous generator control of DFIG based on operation state evaluation was proposed. At last, time domain simulation was carried out on basis of theoretical study. Simulation results showed that the adaptive virtual synchronous generator control of DFIG could provide frequency support to power grid at all operating conditions, frequency stability of power system was improved, and operation stability of DFIG was guaranteed in process of frequency regulation. 1
出处
《电网技术》
EI
CSCD
北大核心
2018年第2期517-523,共7页
Power System Technology
基金
国家自然科学基金项目(51577174)~~
