文章摘要
李斌,叶仕磊,温伟杰,等.基于二极管的直流配电系统故障分区方案及保护策略[J].电力系统自动化,2019,43(23):99-106. DOI: 10.7500/AEPS20190420005.
LI Bin,YE Shilei,WEN Weijie, et al.Diode Based Fault Zone Partition Scheme and Protection Strategy in DC Distribution System[J].Automation of Electric Power Systems,2019,43(23):99-106. DOI: 10.7500/AEPS20190420005.
基于二极管的直流配电系统故障分区方案及保护策略
Diode Based Fault Zone Partition Scheme and Protection Strategy in DC Distribution System
DOI:10.7500/AEPS20190420005
关键词: 直流配电系统  二极管  故障分区  故障定位  保护方案
KeyWords: DC distribution system  diode  fault zone partition  fault location  protection scheme
上网日期:2019-10-29
基金项目:电网安全与节能国家重点实验室开放基金资助项目(JBB51201801595)
作者单位E-mail
李斌 智能电网教育部重点实验室, 天津大学, 天津市 300072 weijie.wen@tju.edu.cn 
叶仕磊 智能电网教育部重点实验室, 天津大学, 天津市 300072  
温伟杰 智能电网教育部重点实验室, 天津大学, 天津市 300072  
王一振 智能电网教育部重点实验室, 天津大学, 天津市 300072  
曹虹 电网安全与节能国家重点实验室(中国电力科学研究院有限公司), 北京市 100192  
王兴国 电网安全与节能国家重点实验室(中国电力科学研究院有限公司), 北京市 100192  
摘要:
      直流故障处理技术包括故障电流清除、故障分区和故障定位等,是直流配电系统广泛工程应用的关键问题。针对采用故障自清除换流器消除故障电流的直流配电系统,为解决健全区失电问题,提出基于二极管的自动故障分区方法和故障定位方法,以及适用于直流配电系统的集成保护方案。首先,介绍了基于二极管故障分区方法的基本原理及其附加硬件要求。其次,针对二极管故障分区的故障特征,提出相应的集成保护方案和故障定位方法。最后,在PSCAD/EMTDC平台搭建五端直流配电系统,通过仿真验证所提方案的有效性。
Abstract:
      Fault processing technology including fault current clearing, fault zone partition and fault location is the key issue of the widely engineering application of DC distribution system. In order to solve the problem of power loss in the sound zone, a diode based automatic fault zone partition method, a fault location method and an integrated protection scheme are proposed for the DC distribution system that uses the fault self-clearing converter to eliminate the fault current. Firstly, the basic principle of diode based fault zone partition method and its additional hardware requirements are introduced. Then, the overall protection scheme and fault location method are proposed considering the fault characteristics of diode based fault partition. Finally, a five-terminal DC distribution system is built on the PSCAD/EMTDC platform to verify the effectiveness of the proposed scheme. This work is supported by Open Foundation of State Key Laboratory of Power Grid Safety and Energy Conservation(No. JBB51201801595). Key words: DC distribution system; diode; fault zone partition; fault location; protection scheme-(上接第57页continued from page 57)Economic Evaluation Method for Multi-scenario DC Transformation of Active Distribution NetworkXU Biao, TANG Wei, ZHANG Lu, MEI Jie, YU Shunjiang(College of Information and Electrical Engineering, China Agricultural University, Beijing 100083, China)Abstract: DC distribution mode has the advantages of high power supply capacity, low loss and flexible control. With the continuous maturity of power electronic technology, AC/DC hybrid distribution network gradually becomes a new research hotspot and development trend. An economic evaluation model for DC transformation of urban distribution network considering high-density load and distributed generator(DG)supply is proposed. The calculation model of minimum installation capacity and its optimal control strategy are used to optimize investment cost and operation cost. In the model, the impairment income caused by the change of DG output curtailment, load shedding and operation cost is considered. In multiple scenarios, the technique of DC transformation is compared with other transformation methods. The influence of DG penetration and DC load ratio on investment economy of DC transformation is also analyzed. The simulation results verify the effectiveness of the proposed economic evaluation method. It also shows that the proposed DC transformation scheme has technical and economic feasibility when the power supply capacity and DG consumption capacity of network are highly required.
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