Analysis on Transient Characteristics of Hybrid DC Transmission Connected-grid System with Wind Power

QI Fangfang; WANG Haiyun; CHANG Peng

doi:10.13296/j.1001-1609.hva.2019.05.031

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Analysis on Transient Characteristics of Hybrid DC Transmission Connected-grid System with Wind Power

更新时间：2025-04-26

- Analysis on Transient Characteristics of Hybrid DC Transmission Connected-grid System with Wind Power
- High VoltageApparatus Vol. 55, Issue 5, Pages: 201-206(2019)
- 作者机构：
  
  1. 新疆大学教育部可再生能源发电与并网控制技术研究中心
  2. 国网新疆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.2019.05.031
  CLC： TM712
- Published：2019
- 稿件说明：
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[1]齐方方,王海云,常鹏.含风电的混合直流输电并网系统暂态特性分析[J].高压电器,2019,55(05):201-206.

QI Fangfang, WANG Haiyun, CHANG Peng. Analysis on Transient Characteristics of Hybrid DC Transmission Connected-grid System with Wind Power[J]. High voltageapparatus, 2019, 55(5): 201-206.
[1]齐方方,王海云,常鹏.含风电的混合直流输电并网系统暂态特性分析[J].高压电器,2019,55(05):201-206. DOI： 10.13296/j.1001-1609.hva.2019.05.031.

QI Fangfang, WANG Haiyun, CHANG Peng. Analysis on Transient Characteristics of Hybrid DC Transmission Connected-grid System with Wind Power[J]. High voltageapparatus, 2019, 55(5): 201-206. DOI： 10.13296/j.1001-1609.hva.2019.05.031.

摘要

为了提高直流输电并网系统的暂态稳定运行特性

文中基于送端采用双馈风电机组（DFIG）

建立LCC-二极管-MMC混合直流输电并网系统

研究该系统的并网暂态运行特性

其整流侧采用电网换相换流器（line commutated converter

LCC）

逆变侧采用模块化多电平换流器（modular multilevel converter

MMC）。为解决MMC无法清除直流故障的问题

在逆变侧的直流出口处加装大功率二极管以阻断故障电流通路。在MATLAB/Simulink平台搭建LCC-二极管-MMC风电并网仿真模型

通过设置直流及并网点接地故障

仿真分析LCC及MMC的各种优越性。研究结果表明:该系统不存在逆变侧换相失败的问题且发生直流故障时系统中大功率二极管能够阻断故障电流通路

在故障期间逆变侧直流电压也无突增现象且有功功率波动极小

从而增强了系统的暂态稳定特性。

Abstract

In order to improve the transient stability of the HVDC system

in this paper uses the DFIG based on sending

to establish the LCC-diode-MMC hybrid DC transmission network system

and study the grid-connected transient operation characteristics of the system

the rectifier side using the line commutated converter（line commutated converter

LCC）

inverter side using modular multilevel converter（modular multilevel converter

MMC）. In order to solve the problems of the MMC can’t remove the DC fault

install the high power diode at the DC outlet of the inverter side to block the fault current path. In the MATLAB/Simulink platform

LCC-diode-MMC wind power grid simulation model is established. The superiority of LCC and MMC is analyzed by setting the DC and grounding fault. The results show that the system does not have the problem of inverter phase commutation failure and the high-power diode in the system can block the fault current path when the DC fault occurs

during the fault

the DC voltage of the inverter side does not increase and the active power fluctuates very small

thus enhancing the system’s transient stability characteristics.

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