摘要
由于阵风的影响,电励磁直驱风力发电机可能存在超速引起的定子过电压问题,本文通过电流矢量图分析了电励磁同步发电机(EESG)的弱磁控制范围。在EESG控制系统中可以通过降低转子侧励磁电流来实现弱磁控制,但由于转子侧电感值过大导致弱磁控制响应较慢。提出一种利用虚拟电感实现快速弱磁的方法,仿真和实验结果表明基于"虚拟电感"的EESG弱磁控制方案具有较快的动态响应。
In order to overcome the stator overvoltage of electricity excitation direct-driven wind power generator in case of short-term overspeed, this paper studies the flux weakening control range of electrically excited synchronous generator （EESG）. Flux weakening control can be obtained by reducing the rotor side excitation current, but the response is too slow because of the large rotor side inductance. This paper proposes a method of using the virtual impedance in the rotor side control system to reduce the inductance of the system. Simulation and experiment results show the flux weakening control of EESG based on virtual inductance has good dynamic response.
出处
《电工技术学报》
EI
CSCD
北大核心
2015年第22期49-56,共8页
Transactions of China Electrotechnical Society
基金
国家能源应用技术研究及工程示范项目资助(NY201503)
关键词
虚拟阻抗
弱磁控制
电励磁同步发电机
风力发电系统
. Virtual impedance, flux weakening control, electrically excited synchronous generator,wind power generation system
