直流配电系统故障分析与保护技术研究

发布时间：2018-01-31 23:08

本文关键词： 直流配电系统保护分区故障分析保护策略　出处：《浙江大学》2014年硕士论文　论文类型：学位论文

【摘要】：随着电力负荷的迅速增长和用户对电能质量要求的不断提高,传统配电系统面临新的挑战。直流配电技术在提高电能质量方面的巨大潜力引起学者们的关注。将直流技术应用于城市中心供电,建设城市直流配电系统,解决城市电网负荷容量大、供电走廊紧张、亟需提升电能质量等问题,是直流技术下一步发展的愿景。由于缺乏成熟、经济的直流断路器和实际运行经验,保护技术成为制约直流配电系统发展的瓶颈。鉴于此,本文概述了直流配电系统保护技术研究的发展现状,从直流配电系统的概念出发,系统阐述了保护技术研究的困境,明确了保护分区与故障类型,对不同保护区内的典型故障进行了理论分析和PSCAD仿真,指出了直流配电系统故障与保护的特殊性。然后综述了直流系统故障隔离及限流装置的发展现状,提出了直流配电系统的保护策略,指出了各保护区域保护系统设计应关注的问题。最后对直流配电系统保护的技术研究做出了展望。
[Abstract]:With the rapid growth of power load and the continuous improvement of power quality requirements of users. Traditional distribution system faces new challenges. The great potential of DC distribution technology in improving power quality has attracted the attention of scholars. DC technology has been applied to power supply in urban centers and the construction of urban DC distribution system. It is the vision of the future development of DC technology to solve the problems such as large load capacity of urban power network, tight power supply corridor and urgent need to improve power quality. Due to the lack of mature, economical DC circuit breaker and practical operation experience. Protection technology has become a bottleneck restricting the development of DC distribution system. In view of this, this paper summarizes the development status of DC distribution system protection technology, starting from the concept of DC distribution system. The difficulties of research on protection technology are expounded systematically, the protection zones and fault types are defined, and the typical faults in different protected areas are analyzed theoretically and simulated by PSCAD. This paper points out the particularity of fault and protection of DC distribution system, then summarizes the development status of fault isolation and current limiting device of DC system, and puts forward the protection strategy of DC distribution system. This paper points out the problems that should be paid attention to in the design of the protection system in each area of protection. Finally, the technical research on the protection of DC distribution system is prospected.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM721.1

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