摘要
为了降低海上风电场的度电成本,避免可及性差导致的维护困难,提出一种海上双馈风电机组开路故障的容错方法。首先,根据开路故障的位置特点给出不同的硬件重构方案。然后,针对转子侧变流器单相开路故障,优化故障后的三相四开关变频器调制信号,同时加入直流电压偏差,补偿故障引起的直流电容电压波动。仿真与实验结果表明,发生单相开路故障后,通过软、硬件容错技术可实现无冗余配置下的非备份式容错运行,提高机组的可用率。
In order to reduce per kilowatt hour cost in offshore wind farms and avoid maintenance difficulties caused by accessibility , a fault‐tolerant method for wind turbines based on doubly‐fed induction generator （DFIG） is put forward . First of all , different hardware reconfiguration schemes are given according to the different locations and characteristics of the open ‐circuit faults . Then , when single‐phase open‐circuit fault occurs in machine‐side converter , three‐phase four‐switch inverter modulation signals are optimized and the DC voltage deviation is added at the same time to compensate capacitor voltage fluctuation . Simulation and experimental results show that when single‐phase open‐circuit fault of DFIG‐based wind turbines is occurred , backup‐free fault‐tolerant operation is realized without redundancy by hardware reconfiguration and software fault tolerance , and the availability ratio of DFIG‐based wind turbines is also improved .
出处
《电力系统自动化》
EI
CSCD
北大核心
2016年第16期83-89,共7页
Automation of Electric Power Systems
基金
上海市科委科技创新项目(16DZ1203504)~~
关键词
海上风电
双馈感应发电机
开路故障
硬件容错
软件容错
offshore wind power
doubly-fed induction generator （ DFIG ）
open-circuit fault
hardware fault tolerance
software fault tolerance
