...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Emerging and Selected Topics in Power Electronics, IEEE Journal of >A Comprehensive AC-Side Single-Line-to-Ground Fault Ride Through Strategy of an MMC-Based HVDC System
【24h】

A Comprehensive AC-Side Single-Line-to-Ground Fault Ride Through Strategy of an MMC-Based HVDC System

机译：基于MMC的HVDC系统的全面交流侧单线接地故障穿越策略

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

When a single-line-to-ground (SLG) fault occurs on the ac side of the modular multilevel converter (MMC) in an high-voltage direct-current transmission (HVDC) system, it results in the ac-side voltage sag and leads to an instantaneous reduction of the MMC power capacity. Thus, it calls for the fault ride through (FRT) strategy to coordinate two MMC stations in the HVDC system to protect the MMCs against the submodule (SM) capacitor overvoltage in case of the SLG fault. In the meantime, the HVDC system is expected to track the prefault active power as much as possible during the FRT to secure the power system stability. In this paper, a comprehensive FRT strategy is proposed, which is free of interstation communication. The proposed FRT strategy presents fast dynamic response, and it can prevent effectively the MMC SM-capacitor overvoltage and HVDC transmission line overvoltage. Moreover, the second-order voltage and current fluctuations in the HVDC transmission line caused by the grid unbalance are inherently avoided. Validity of the proposed strategy and its superiority over existing methods are demonstrated by simulation of a 200-kV, 400-MW cable-based HVDC system.
机译：当高压直流输电（HVDC）系统中的模块化多电平转换器（MMC）的交流侧发生单线接地（SLG）故障时，会导致交流侧电压骤降和导致MMC功率容量的瞬时降低。因此，它要求通过故障穿越（FRT）策略来协调HVDC系统中的两个MMC站，以在SLG故障的情况下保护MMC免受子模块（SM）电容器的过压。同时，期望HVDC系统在FRT期间尽可能跟踪故障前有功功率，以确保电力系统的稳定性。本文提出了一种全面的FRT策略，该策略无需站间通信。所提出的FRT策略具有快速的动态响应，可以有效地防止MMC SM电容器过电压和HVDC传输线过电压。而且，固有地避免了由电网不平衡引起的HVDC输电线路中的二次电压和电流波动。通过对基于200 kV，400 MW电缆的HVDC系统进行仿真，证明了所提出策略的有效性及其相对于现有方法的优越性。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号