Fault Ride-through Strategy for Integration of Permanent Magnet Direct-driven Wind Turbines via MMC-HVDC

YU Yang; XU Qian; YANG Shengfeng; XU Zheng

doi:10.13296/j.1001-1609.hva.2017.10.025

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Fault Ride-through Strategy for Integration of Permanent Magnet Direct-driven Wind Turbines via MMC-HVDC

更新时间：2025-04-26

- Fault Ride-through Strategy for Integration of Permanent Magnet Direct-driven Wind Turbines via MMC-HVDC
- High VoltageApparatus Vol. 53, Issue 10, Pages: 150-157(2017)
- 作者机构：
  
  1. 浙江大学电气工程学院
  2. 浙江省电力公司经济技术研究院
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2017.10.025
  CLC： TM315
- Published：2017
- 稿件说明：
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[1]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.

YU Yang, XU Qian, YANG Shengfeng, et al. Fault Ride-through Strategy for Integration of Permanent Magnet Direct-driven Wind Turbines via MMC-HVDC[J]. High voltageapparatus, 2017, 53(10): 150-157.
[1]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. DOI： 10.13296/j.1001-1609.hva.2017.10.025.

YU Yang, XU Qian, YANG Shengfeng, et al. Fault Ride-through Strategy for Integration of Permanent Magnet Direct-driven Wind Turbines via MMC-HVDC[J]. High voltageapparatus, 2017, 53(10): 150-157. DOI： 10.13296/j.1001-1609.hva.2017.10.025.

摘要

当受端交流电网发生严重短路故障

经柔性直流并网的风电场必须降低出力

使直流输电系统的直流电压保持在安全范围内。针对永磁直驱风机经MMC-HVDC并网系统

提出一种提升其故障穿越能力的控制策略。该策略结合降低风电场交流电压和降低风机输出有功电流2种方式

可以实现风电场侧有功功率的快速降低。同时

为了在故障时限制永磁直驱风机直流链电压的增长

在风机中引入直流电压偏差控制。仿真结果表明:主网发生对称和不对称故障时

MMC直流电压和永磁同步风机直流链电压均可维持稳定

系统可以实现故障穿越。

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.

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