摘要
为解决电网电压骤升情况,研究双馈异步风力发电机在高电压穿越下的动态特性,设计出一种定子电流补偿与转子虚拟电阻协同控制的高电压穿越方案。虚拟电阻控制策略会增加直流母线侧电压,导致电网故障程度加重,定子侧增加电流补偿项的控制策略可以达到控制直流母线电压的作用。转子侧增加虚拟电阻和定子侧增加电流补偿项协同控制策略的方法,可以降低直流母线侧电压,缩短电压振荡过程,从而提高系统的高电压穿越能力。通过在Simulink仿真软件搭建增加转子侧电流补偿项的传统控制模型和定子电流补偿与转子虚拟电阻协同控制策略模型进行仿真,得出定子电流补偿与转子虚拟电阻协同控制策略可以有效抑制有功和无功功率、直流母线侧电压、电磁转矩和转子电流冲击幅度,同时加快母线侧电压恢复时间,提高系统故障穿越能力。
In order to solve the problem of voltage surge in the power grid,the dynamic characteristics of doubly fed asynchronous wind turbines under high voltage ride through are researched,and a high⁃voltage ride⁃through scheme for collaborative control of stator current compensation and rotor virtual resistance is designed.The virtual resistance control strategy will increase the voltage on the direct⁃current bus side,resulting in aggravation of the power grid fault,and the control strategy of increasing the current compensation item on the stator side can achieve the role of controlling the direct⁃current bus voltage.The collaborative control strategy of adding virtual resistance on the rotor side and adding current compensation on the stator side can reduce the voltage on the DC bus side and shorten the voltage oscillation process,thus improving the high voltage ride⁃through capability of the system.By building a traditional control model with rotor side current compensation and a collaborative control strategy model with stator current compensation and rotor virtual resistance in Simulink simulation software,it is concluded that the collaborative control strategy of stator current compensation and rotor virtual resistance can effectively suppress active and reactive power,DC bus side voltage,electromagnetic torque,and rotor current impact amplitude,while accelerating the recovery time of bus side voltage,and improve the system′s fault traversal capability.
作者
项志成
买买提热依木·阿布力孜
郭岳霖
XIANG Zhicheng;MAIMAITIREYIMU Abulizi;GUO Yuelin(College of Electrical Engineering,Xinjiang University,Urumqi 830017,China)
出处
《现代电子技术》
2023年第20期1-6,共6页
Modern Electronics Technique
基金
国家自然科学基金项目(62163034)。
关键词
定子电流
转子电阻
虚拟电阻
协同控制
双馈异步风力发电机
高电压穿越
动态特性分析
stator current
rotor resistance
virtual resisance
collaborative control
double fed induction generator
high voltage ride⁃through
dynamic characterization analysis
