[1]高淑萍,高悦,宋国兵,等.利用Teager能量算子瞬时能量的模块化多电平换流器多端柔性直流电网保护方法[J].西安交通大学学报,2020,54(09):040-48.[doi:10.7652/xjtuxb202009004]
 GAO Shuping,GAO Yue,SONG Guobing,et al.A Protection Method Based on Instantaneous Energy of Teager Energy Operator for Modular Multilevel Converter Multiterminal Flexible Direct Current Grid[J].Journal of Xi'an Jiaotong University,2020,54(09):040-48.[doi:10.7652/xjtuxb202009004]
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利用Teager能量算子瞬时能量的模块化多电平换流器多端柔性直流电网保护方法
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《西安交通大学学报》[ISSN:0253-987X/CN:61-1069/T]

卷:
54
期数:
2020年第09期
页码:
040-48
栏目:
出版日期:
2020-09-10

文章信息/Info

Title:
A Protection Method Based on Instantaneous Energy of Teager Energy Operator for Modular Multilevel Converter Multiterminal Flexible Direct Current Grid
文章编号:
0253-987X(2020)09-0040-09
作者:
高淑萍1 高悦1 宋国兵2 姜元月1 段必聪1
1.西安科技大学电气与控制工程学院, 710054, 西安; 2.西安交通大学电气工程学院, 710049, 西安
Author(s):
GAO Shuping1 GAO Yue1 SONG Guobing2 JIANG Yuanyue1 DUAN Bicong1
1. School of Electrical and Control Engineering, Xi’an University of Science and Technology, Xi’an 710054, China; 2. School of Electrical Engineering, Xi’an Jiaotong University, Xi’an 710049, China
关键词:
柔性直流电网 模块化多电平换流器 故障 Teager能量算子 纵联保护
Keywords:
flexible direct current grid modular multilevel converter direct current fault Teager energy operator pilot protection
分类号:
TM773
DOI:
10.7652/xjtuxb202009004
文献标志码:
A
摘要:
为提高模块化多电平换流器多端柔性直流电网快速清除和隔离故障的能力,提出了一种利用Teager能量算子提取电压故障分量瞬时能量的纵联保护方法。根据多端柔性直流电网故障后的电压故障分量瞬时能量的不同,利用Teager能量算子对电压故障分量进行处理,提取电压故障分量瞬时能量最大值,构造保护判据,给出整定原则。利用各保护测量安装处的电压故障分量瞬时能量最大值判定故障区间及区内外故障。利用同侧换流站正负极电压故障分量瞬时能量之比进行单双极故障判定,并进行故障选极。在PSCAD/EMTDC仿真平台搭建了±500 kV四端柔性直流电网模型进行验证,结果表明,所提方法可在3 ms内快速可靠动作,耐过渡电阻能力强,在不同的工况下都可准确进行故障区间及区内外故障判别,并可实现故障选极。
Abstract:
To improve the ability of quick clearing and isolating faults of modular multi-level converter(MMC)multi-terminal flexible DC grid, a new pilot protection method with instantaneous energy of voltage fault component extracted by Teager energy operator is proposed. According to the difference of the instantaneous energy of the voltage fault component in the multi-terminal flexible grid with a fault, the protection method chooses Teager energy operator to process the voltage fault component to obtain the maximum instantaneous energy of voltage fault component, then establishes the protection criterion by the maximum instantaneous energy of the voltage fault component, and gives the setting principle. The fault interval and the internal and external faults are determined by the maximum value of the instantaneous energy of the fault component at each protection measurement device, unipolar or bipolar fault is distinguished by the ratio of positive and negative pole fault components’ instantaneous energy of converter station on the same side for fault pole seletion. A ±500 kV four-terminal flexible DC power grid model is constructed to verify the protection algorithm on PSCAD/EMTDC. Simulation shows that the proposed protection method can operate quickly and reliably within 3 ms, has strong capacity to resist transition resistance, and can accurately identify the fault interval, distinguish between internal and external faults, implement fault pole selection under different conditions.

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备注/Memo

备注/Memo:
收稿日期: 2020-03-23。作者简介: 高淑萍(1970—),女,副教授,硕士生导师。基金项目: 国家自然科学基金资助项目(51777166); 国家自然科学基金联合基金重点支持项目(U1766209); 国家留学基金资助项目。
更新日期/Last Update: 2020-09-10