直驱式风电机组的稳定性及低电压穿越能力分析  

Stability of Grid-connected Direct-driven Wind Turbine Generators and the Ability of Low Voltage Ride Through

作　　者：杨子成[1] YANG Zi-cheng(State Grid Shanxi Electric Power Company, Taiyuan 030001 ,China)

机构地区：[1]国网山西省电力公司,太原030001

出　　处：《电力学报》2016年第5期391-400,共10页Journal of Electric Power

摘　　要：现今直驱永磁风力发电机得到人们越来越多的广泛重视。虽然该机组在能量转换效率和并网特性上有了很大改善,但其出力仍要受到自然风速的限制,风速的随机性与不可控性直接导致风电场成为不稳定的间歇性电源。因此,对该机组建模并研究其相关运行特性,分析其对电网的消极影响并提出措施加以改善,是风电场规划设计阶段的基础性工作。通过搭建基于直驱式风力发电机的并网系统仿真模型,分析机组处于风速扰动和电网故障时的运行特性和稳定性,以及机组的低电压穿越能力,提出有效抑制直流电容过电压的保护措施,保障直流电容和变流器装置安全运行。该研究结果对于制造直驱式风力发电机企业的发展,及该类型并网机组的安全稳定运行具有重要意义。Nowadays, direct-driven wind turbine with permanent magnet synchronous generators get more and more attention. Although the generator on the energy conversion efficiency and grid-cormected features have improved a lot, but its output power are limited by natural wind speed. Wind randonmess and no-controllable directly led to the wind farm to become unstable intermittent power supply. Therefore, research on the generator modeling and its related fea- tures, analyzes the negative impact on the grid and put forward improving measures, is the basic work of wind farm planning and design stage. This paper investigates the operating characteristic and stability of grid-connected direct- driven wind generator under wind speed disturbance and short circuit faults, and the ability of wind power low voltage ride through. By effectively restrain dc over-voltage protective measures ensure the safety operation of dc capacitor and converter device. The results provide great significance for the development of enterprises manufacturing direct-driven wind turbines, as well as the safe and stable operation of the type grid-connected wind generators.

关 键 词：直驱式风力发电机 稳定性 低电压穿越 卸荷电阻 

分 类 号：TM315[电气工程—电机]