摘要
风电机组运行环境复杂多变、受非定常载荷影响显著,功率变流器作为风力发电系统的关键部件,面临着严峻的可靠性挑战。由于风电机组可及性差和运维成本高,变流器的容错运行不但能有效提高系统不间断运行能力和可用率,而且还能使检修人员可以更合理地安排事后维修,最大程度地提升风电场的经济效益和运维安全保障。为了实现容错运行,该文提出一种基于智能算法实时矢量优化的变流器容错控制方法。该方法采用遗传算法,并以实际参考电压矢量作用时间和角度与设定目标之间的绝对误差最小值作为优化目标函数,同时借助高算力硬件和并行计算策略对畸变电压空间矢量进行实时精准优化补偿。实验结果表明:故障产生的三相电流畸变、直流电压降低和发电机转速波动经容错控制后均有明显改善;容错运行的变流器性能表现稳定,并且不会随故障状态的改变而发生大范围的波动。该文的探索也为在电力电子系统实时控制中运行大计算量的智能优化算法提供了有效的解决方案。
Due to the complex and changeable operating environment,wind turbines are significantly affected by unsteady loads.As a key assembly of wind power generation system,power converters are facing severe reliability challenges.Considering poor accessibility of wind turbines and high cost of operation and maintenance,the fault-tolerant operation of power converter can effectively improve uninterrupted operation capacity and availability of wind turbines,meanwhile it allows maintenance personnel to arrange post-maintenance reasonably.This will contribute to maximize the economic benefits and improve maintenance security of wind farms.To realize fault-tolerant operation,this paper proposed a fault-tolerant control approach for the power converter based on real-time vector optimization of intelligence algorithm.The approach adopted the Genetic Algorithm and designed the objective optimization functions by taking the minimum absolute errors between the acting time,angle of actual reference voltage vector and the set targets.In the meantime,high-performance hardware and parallel computing strategy were used to implement the real-time accurate optimization and compensation of distorted voltage space vectors.The experimental results showed that the three-phase current distortion,DC voltage drop and generator speed fluctuation caused by faults were improved considerably after fault tolerance.The performance of the fault-tolerant converter was stable,and did not fluctuate widely following the change of fault conditions.The research in this paper has also provided an effective solution for running intelligent optimization algorithms with a large amount of calculation in the real-time control of power electronic systems.
作者
施耀华
冯延晖
徐晨
邱颖宁
SHI Yaohua;FENG Yanhui;XU Chen;QIU Yingning(School of Energy and Power Engineering,Nanjing University of Science and Technology,Nanjing 210094,Jiangsu Province,China)
出处
《中国电机工程学报》
EI
CSCD
北大核心
2022年第1期372-384,共13页
Proceedings of the CSEE
基金
国家重点研发计划项目(2019YFE0104800)。
关键词
永磁同步风电系统
变流器故障
容错控制
智能算法
实时矢量优化
permanent magnet synchronous wind power system
converter fault
fault-tolerant control
intelligence algorithm
real-time vector optimization
