摘要
电网准则要求风力发电机组应该具有并网点电压调节能力。基于这一问题,提出了直驱永磁同步风力发电系统无功功率支撑策略。建立了风力涡轮机、永磁同步电机以及电压源型变换器的数学模型,分析了网侧和机侧变换器的控制原理,给出了系统控制框图。通过Matlab/Simulink仿真软件建立了1.5 MW直驱永磁同步风力发电系统的仿真模型,分别对电网正常和电网故障情况进行了仿真研究。实验结果表明所提出的无功功率支撑策略在直流母线电压稳定的基础上能够提升公共耦合点(point of common coupling,PCC)电压。当风电场中多台风电机组采用该方法时,能够帮助PCC电压恢复至正常范围。
Grid criterion requires that the wind power generating system should have PCC voltage regulationability.Based on this problem,the reactive power support strategy was proposed for direct drive permanent magnetsynchronous wind power generation system.The mathematical model of wind turbine,permanent magnet synchronousmotor and voltage source converter was established,the control principles of the grid side and the machine sideconverter were analyzed,and the control graphs were also given.The simulation model of1.5MW direct drivepermanent magnet synchronous wind power generation system was established by Matlab/Simulink simulationsoftware.Simulation results show that the proposed control strategy can improve the point of common coupling(PCC)voltage on the basis of DC bus voltage stability.When the proposed control strategy is applied for multiple windturbine generators in the wind farm,it can restore the PCC voltage to the normal range.
作者
杨骏华
陈永强
刘扬
YANG Junhua;CHEN Yongqiang;LIU Yang(School of Electrical and Information Engineering,Xihua University,Chengdu 610039 ,Sichuan,China)
出处
《电气传动》
北大核心
2017年第2期43-47,共5页
Electric Drive
关键词
直驱永磁同步风力发电系统
无功支撑
最大功率跟踪控制
并网变换器
矢量控制
direct drive permanent magnet synchronous wind power generation system
reactive support
maximum power tracking control
grid-connected converter
vector control
