基于电压电流突变量的MMC-MTDC纵联保护方案

doi:10.3969/j.issn.1000-7229.2018.10.012

电力建设 ›› 2018, Vol. 39 ›› Issue (10): 99-105.doi: 10.3969/j.issn.1000-7229.2018.10.012

基于电压电流突变量的MMC-MTDC纵联保护方案

王鑫，杨明玉，吕佳宁

华北电力大学电气与电子工程学院，河北省保定市 071003

出版日期:2018-10-01
作者简介:王鑫（1994），女，硕士研究生，主要从事电力系统保护与控制方面的研究工作；杨明玉（1965），女，硕士，副教授，高级工程师，主要从事电力系统微机继电保护方面的研究和教学工作；吕佳宁（1995），女，硕士研究生，主要从事直流输电系统保护方面的研究工作。
基金资助:
国家重点研发计划项目（2016YFB0900203）；河北省自然科学基金项目（E2018502063）；中央高校基本科研业务费专项基金（2017MS096）

MMC-MTDC Pilot Protection Scheme Based on Voltage and Current Mutation

WANG Xin, YANG Mingyu, LU Jianing

School of Electric and Electronic Engineering ,North China Electric Power University, Baoding 071003，Hebei Province, China

Online:2018-10-01
Supported by:
This work is supported by National Key Research and Development Program of China （No. 2016YFB0900203）； Natural Science Foundation of Hebei Province of China （E2018502063）； Fundamental Research Funds for the Central Universities （2017MS096）.

摘要/Abstract

摘要： 作为柔性直流输电线路后备保护的纵联电流差动保护，通过较长延时来防止线路分布电容等问题引起的误动，无法满足保护对于速动性的要求，针对这一问题提出了一套基于电压电流突变量夹角余弦值的纵联保护方案。该方案利用故障发生时，故障与非故障状态下直流线路两端的电压、电流突变量之间的夹角余弦值构造故障识别判据，并利用故障发生时线路正、负极电压的数值差异作为故障极判据，形成了一套完整的纵联保护方案。最后，在PSCAD/EMTDC平台上搭建了基于模块化多电平换流器的多端柔性直流输电（modular multilevel converter-multi-terminal direct current，MMC-MTDC）系统仿真模型对保护方案进行验证，结果表明，所提纵联保护方案能够实现在各种故障情况下的故障判别，并且满足直流线路对保护速动性的要求，可以作为直流线路的后备保护。

关键词: MMC-MTDC, 纵联电流差动保护, 电压电流突变量, 夹角余弦

Abstract: As the reserve protection of the DC transmission line, the longitudinal current differential protection prevents the unwanted operation caused by distributed capacitance by the long delay and the requirement for quick action of the protection cannot be satisfied. This paper proposes a pilot protection based on the cosine of angle difference between the voltage and current mutations. The fault identification criterion is constructed by the cosine of angle difference between the voltage and current mutations. And the difference between the positive and negative voltages is used to identify the fault pole. Finally, a four-terminal MMC-MTDC simulation model is built on the PSCAD/EMTDC platform to verify the protection scheme. The results show that the proposed scheme can realize fault identification under various fault conditions and meet the requirement of fast protection, and can be used as the reserve protection of DC transmission lines.

Key words: MMC-MTDC, pilot current differential protection, voltage and current mutation, cosine

中图分类号:

TM 771

王鑫，杨明玉，吕佳宁. 基于电压电流突变量的MMC-MTDC纵联保护方案[J]. 电力建设, 2018, 39(10): 99-105.

WANG Xin, YANG Mingyu, LU Jianing. MMC-MTDC Pilot Protection Scheme Based on Voltage and Current Mutation[J]. Electric Power Construction, 2018, 39(10): 99-105.

参考文献

［1］汤广福. 基于电压源换流器的高压直流输电技术［M］. 北京：中国电力出版社, 2010：118-120.

［2］徐政, 管敏渊. 柔性直流输电系统［M］. 北京：机械工业出版社, 2013:1-25.

［3］张峻榤, 向往, 林卫星,等. 基于混合型MMC和直流开关的柔性直流电网直流故障保护研究［J］. 电力建设, 2017, 38（8）:52-58.

ZHANG Junjie，XIANG Wang，LIN Weixing，et al. DC fault protection of VSC-HVDC grid based on hybrid MMC and DC switch［J］.Electric Power Construction, 2017, 38（8）:52-58.

［4］胡航海，李敬如，杨卫红，等. 柔性直流输电技术的发展与展望［J］.电力建设，2011，32（5）:62-66.

HU Hanghai，LI Jingru，YANG Weihong ，et al.The development and prospect of HVDC flexible technology ［J］.Electric Power Construction，2011，32（ 5） : 62-66.

［5］BARAN M E，MAHAJAN N R.DC distribution for industrial systems：Opportunities and challenges［J］.IEEE Transactions on Industry Applications，2003，39（6）:1596-1601.

［6］李斌, 何佳伟, 李晔,等. 基于边界特性的多端柔性直流配电系统单端量保护方案［J］. 中国电机工程学报, 2016, 36（21）:5741-5749.

LI Bin, HE Jiawei, LI Ye, et al. Single-ended protection scheme based on boundary characteristic for the multi-terminal VSC-based DC distribution system［J］. Proceedings of the CSEE, 2016, 36（21）:5741-5749.

［7］宁连营, 邰能灵, 郑晓冬,等. 基于单端暂态电流的MMC-HVDC输电线路保护方案研究［J］. 中国电机工程学报, 2017,37（17）:5010-5017.

NING Lianying, TAI Nengling, ZHENG Xiaodong, et al. Research on MMC-HVDC transmission line protection scheme based on one terminal transient current［J］. Proceedings of the CSEE, 2017, 37（17）:5010-5017.

［8］王帅, 毕天姝, 李伟,等. MMC-MTDC线路双极永久性故障快速识别方法研究［J］. 可再生能源, 2017,35（1）:43-49.

WANG Shuai, BI Tianshu, LI Wei, et al. A fast bipolar permanent fault identification approach for MMC-MTDC lines［J］. Renewable Energy Resources, 2017,35（1）:43-49.

［9］何佳伟, 李斌, 李晔,等. 多端柔性直流电网快速方向纵联保护方案［J］. 中国电机工程学报, 2017,37（23）:6878-6887.

HE Jiawei， LI Bin， LI Ye，et al. A fast directional pilot protection scheme for the MMC-based MTDC grid ［J］. Proceedings of the CSEE, 2017,37（23）:6878-6887.

［10］周家培,赵成勇,李承昱,等. 基于直流电抗器电压的多端柔性直流电网边界保护方案［J］. 电力系统自动化,2017,41（19）:89-94,146.

ZHOU Jiapei, ZHAO Chengyong, LI Chengyu, et al. Boundary protection scheme for multi-terminal flexible DC grid based on voltage of DC reactor［J］. Automation of Electric Power Systems, 2017,41（19）:89-94,146.

［11］毕天姝,王帅,贾科,等. 基于短时能量的多端柔性直流单极接地故障线路识别方法［J］. 电网技术,2016,40（3）:689-695.

BI Tianshu, WANG Shuai, JIA Ke, et al. Short-term energy based approach for monopolar grounding line identification in MMC-MTDC system［J］. Power System Technology, 2016,40（3）:689-695.

［12］齐国强,王增平.基于Hilbert-Huang变换的HVDC突变量方向纵联保护方法［J］.电力系统保护与控制,2017,45（20）:92-99.

QI Guoqiang, WANG Zengping. Directional pilot protection method of fault component for HVDC transmission lines based on Hilbert-Huang transform［J］. Power System Protection & Control, 2017,45（20）:92-99.

［13］邢鲁华,陈青,高湛军.基于电压和电流突变量方向的高压直流输电线路保护原理［J］.电力系统自动化,2013,37（6）:107-113.

XING Luhua, CHEN Qing, GAO Zhenjun, et al. A new protection principle for HVDC transmission lines based on fault component of voltage and current［J］. Automation of Electric Power Systems, 2013,37（6）:107-113.

基于电压电流突变量的MMC-MTDC纵联保护方案

MMC-MTDC Pilot Protection Scheme Based on Voltage and Current Mutation

PDF

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 0

编辑推荐

Metrics

本文评价