半月刊

ISSN 1000-1026

CN 32-1180/TP

+高级检索 English
柔性直流电网故障电流主动控制典型方案综述
作者:
作者单位:

新能源电力系统国家重点实验室,华北电力大学,北京市102206

作者简介:

通讯作者:

基金项目:

国家重点研发计划资助项目(2018YFB0904600);国家自然科学基金资助项目(51777072)。


Overview on Typical Schemes for Active Control of Fault Current in Flexible DC Grid
Author:
Affiliation:

State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, China

Fund Project:

This work is supported by National Key R&D Program of China (No. 2018YFB0904600) and National Natural Science Foundation of China (No. 51777072).

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
    摘要:

    柔性直流电网网架结构与运行方式多样,多种电力电子设备之间存在强耦合关系,其故障特性复杂,协调控制困难,对故障电流进行积极主动的控制仍然面临着很大的挑战。文中基于柔性直流电网故障电流发展机理,对交直流电网故障特性做了对比和总结,说明了柔性直流电网故障电流主动控制的必要性和可能性;确定了柔性直流电网故障电流主动控制方案的基本原则;总结了国内外研究成果,根据选择性原则和抑制原理对主动控制方案进行了分类;以几种典型方案为例,分析了不同类型主动控制方案特性,并在PSCAD/EMTDC中进行了仿真验证,对不同主动控制方案的特性进行了对比和总结。结果表明,通过源侧和网侧设备协同配合进行故障电流的主动控制,能够快速隔离故障,节约线路投资成本,具有快速恢复能力。

    Abstract:

    The structure and operation modes of flexible DC grid are diverse, and there are strong coupling relationships among various power electronic devices. The fault characteristics are complex, coordination control is difficult, and active control of fault current still faces great challenges. Based on the development mechanism of fault current in flexible DC grid, the paper compares and summarizes the fault characteristics of AC and DC grids, and illustrates the necessity and possibility of active control of fault current in flexible DC grid. The basic scheme of active control scheme for fault current of flexible DC grid is determined. Domestic and foreign research results is summarized, active control schemes according to selectivity principle and suppression principle is classified. Taking several typical schemes as examples, the characteristics of different types of active control schemes is analyzed and simulated in PSCAD/EMTDC verification, the characteristics of different active control schemes is compared and summarized. The results show that the active control of fault current is coordinated by the source side and the network side equipment, which can isolate fault quickly, save the cost of line investment and recover quickly.

    表 1 交直流电网故障特性对比Table 1 Characteristics comparison of fault current in AC and DC grid
    表 2 柔性直流电网故障电流主动控制典型方案性能对比Table 2 Performance comparison of typical schemes for active control of fault current in flexible DC grid
    图1 柔性直流电网网架结构示意图Fig.1 Diagram of flexible DC grid structure
    图2 ± 500 kV张北柔性直流电网故障电流传播路径Fig.2 Propagation path of fault current for ± 500 kV Zhangbei flexible DC grid
    图3 四端柔性直流电网故障线路电流Fig.3 Current of fault line in four-terminal DC grid
    图4 柔性直流电网故障电流主动控制方案分类Fig.4 Classification of active control scheme for current fault in flexible DC grid
    图5 直流钳压器拓扑结构及动作过程Fig.5 Topology structure and operation process of DC voltage clamper
    图6 直流钳压器动作波形示意图Fig.6 Diagram of operation waveform for DC voltage clamper
    图7 混合子模块型MMC拓扑结构Fig.7 Topology structure of MMC based on hybrid sub-modules
    图8 混合型MMC动作波形示意图Fig.8 Waveform diagram of operation for hybrid MMC
    图9 限流器及断路器拓扑结构及动作过程Fig.9 Topology and operation process of current limiter and DCCB
    图10 限流式DCCB动作波形示意图Fig.10 Waveform diagram of DCCB based on current limiter
    图11 桥臂DM拓扑结构及安装位置Fig.11 Topology structure and installation location of DM
    图12 改进换流器动作过程波形示意图Fig.12 Waveform diagram of operation process for improved MMC
    图13 改进MMC子模块型源网配合主动控制方案Fig.13 Active control scheme of improved MMC based on sub-modules combined source and grid
    图14 源网配合方案动作过程波形示意图Fig.14 Waveform diagram of scheme combined source and grid
    参考文献
    相似文献
    引证文献
引用本文

赵成勇,宋冰倩,许建中.柔性直流电网故障电流主动控制典型方案综述[J].电力系统自动化. DOI:10.7500/AEPS20190626003.

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2019-06-26
  • 最后修改日期:2020-02-08
  • 录用日期:2019-10-22
  • 在线发布日期:
  • 出版日期: