基于直接磁链跟踪控制的无刷双馈电机无Crowbar对称低电压穿越方法
Crowbarless Symmetrical Low-voltage Ride Through Method for Brushless Doubly Fed Induction Generators Based on Direct Flux Tracking Control
樊慧彬 1王淑红 1李佳彬 1曹建文 2许连丙 2姜铭 2张爱玲1
作者信息
- 1. 太原理工大学电气与动力工程学院,山西省 太原市 030024
- 2. 中国煤炭科工集团太原研究院有限公司,山西省 太原市 030006
- 折叠
摘要
低电压穿越(low-voltage ride through,LVRT)能力是并网型风电机组重要的性能指标之一.该文提出一种基于直接磁链跟踪控制的无刷双馈感应发电机(brushless doubly fed induction generator,BDFIG)无Crowbar对称低电压穿越方法.该方法基于开关表,通过直接选定电压空间矢量来控制无刷双馈电机控制绕组(control winding,CW)磁链的幅值和相位,以迅速抑制低电压穿越期间控制绕组的感应过电压和由此导致的过电流,同时快速向电网注入动态无功电流以支撑电压恢复.该方法无需坐标变换、系统结构简单、磁链动态响应迅速.样机实验结果表明,低电压穿越过程中,有功恢复及无功功率动态响应满足国标相关要求,且控制绕组电流得到有效抑制,验证了所提控制策略的有效性.
Abstract
Low-voltage ride through(LVRT)capability is one of the most critical performance indicators for grid connected wind turbines.In this paper,a crowbarless symmetrical LVRT method for brushless doubly fed induction generators(BDFIG)based on direct flux linkage tracking control is proposed.Based on the switch table,the method controls the amplitude and phase of the BDFIG control winding(CW)flux linkage by directly selecting the voltage space vector,so as to suppress the induced overvoltage rapidly,causing overcurrent in the CW during LVRT,while rapidly injecting dynamic reactive current into the grid to support voltage recovery.The method requires no coordinate transformation,with the advantages of simple system structure and quick flux dynamic response.The experimental results show that during the LVRT,active power recovery and reactive power dynamic response meet the relevant requirements of the Chinese national standard,and the CW current is effectively suppressed,which verifies the effectiveness of the proposed control strategy.
关键词
无刷双馈电机/直接磁链跟踪控制/低电压穿越/磁链幅值优先/开关表Key words
brushless doubly-fed induction generators/direct flux tracking control/low-voltage ride-through/flux linkage amplitude priority/switching table引用本文复制引用
基金项目
国家自然科学基金(51477110)
山西省重点研发计划(高新领域)一般项目(51477110)
出版年
2024
国家科技期刊平台
NSTL
维普
万方数据