高压电器2017，Vol.53Issue(10)：150-157,8.DOI:10.13296/j.1001-1609.hva.2017.10.025
永磁直驱风机通过MMC-HVDC并网的故障穿越策略
Fault Ride-through Strategy for Integration of Permanent Magnet Direct-driven Wind Turbines via MMC-HVDC
于洋 1徐谦 2杨升峰 2徐政1
作者信息
- 1. 浙江大学电气工程学院,杭州310027
- 2. 浙江省电力公司经济技术研究院,杭州310008
- 折叠
摘要
Abstract
It is necessary to reduce the output power of wind farms connected by flexible HVDC when a severe AC fault occurs in the grid.In this way,the DC voltage of the HVDC system can be kept within the safe range.A control strategy is proposed for enhancing the fault ride-through capability of the MMC-HVDC system connecting permanent magnet direct-driven wind turbines to the grid.A controlled voltage drop in the wind farm AC system and a controlled reduction of wind turbines'output active currents are combined to achieve a fast power reduction.Meanwhile,DC voltage deviation control is adopted to limit the voltage increase of the wind turbine DC link.The results of simulations show that the DC side voltages of MMC and wind turbines can keep stable under balanced or unbalanced fault conditions.The whole system can achieve fault ride-through by employing the proposed strategy.关键词
风电并网/永磁直驱风机/模块化多电平换流器/故障穿越/直流电压偏差控制Key words
wind power integration/permanent magnet direct-driven wind turbines/modular multilevel converter/fault ride-through/DC voltage deviation control引用本文复制引用
于洋,徐谦,杨升峰,徐政..永磁直驱风机通过MMC-HVDC并网的故障穿越策略[J].高压电器,2017,53(10):150-157,8.
