文档介绍：上海交通大学硕士学位论文 ABSTRACT
基于的集散式小电流接地选线系统的研制
摘要
在中压电网中单相接地故障占总故障的 80 以上对单相接
地危害的治理非常重要在各种治理方式中通过利用微机选线加
上自动跟踪补偿的消弧线圈在供电可靠性人身安全设备安全
和通信干扰等方面良好运行特性的基础上克服了早先谐振接地需
人工调谐等缺点成为比较理想的中性点接地方式
谐振接地系统属于小电流接地系统目前在这类系统中广泛采用
的接地选线装置分为两大类一类是利用各种方法对接地后电网的
固有电气特性做分析从而选出接地支路另一类是基于外加工频
或变频信号注入的原理由于接地故障复杂多变目前还未有一种
理想的接地选线装置能够有效地适用于所有的实际接地故障的选
线
本文在综合分析补偿电网单相接地故障特性的基础上针对零序
电流综合增量法和暂态能量法对永久性和暂态性接地故障进行选线
的原理设计并实现了基于 DSP 和集散式采集系统的选线装置样机
对这两种原理在补偿电网单项接地选线中的应用做了深入的工作
样机使用 TI 公司的 DSP 器件 TMS320LF2407A 作为核心处理器
根据模拟电网配以相应参数的信号调理通道对零序电压电流的
采样率达到 10Ksps 以上能够准确地捕捉单项接地故障发生时刻的
上海交通大学硕士学位论文 ABSTRACT
暂态信息当故障发生时样机针对永久性接地采用效果良好的综
合增量法针对暂态接地则采用暂态能量法进行选线
经模拟电网接地实验证明本课题所研制的选线装置能够在接地
发生时准确有效地选出故障支路
关键词: 小电流单相接地故障选线集散式 DSP
上海交通大学硕士学位论文 ABSTRACT
RESEARCH ON DSP BASED DISTRIBUTED LOCATION SYSTEM IN
SMALL CURRENT NEUTRAL WORKS
ABSTRACT
In medium works, more than 80% of the faults happened are single
phase to earth faults, thus the importance to deal with this kind of fault type is obvious.
Among all the treatments, using pensated neutral with an automatic tracing and
compensating arc-suppression coil aided by a set of faulty feeder location system has
e a promising protection method, for it has many advantages in such aspects:
reliability of power supply, human safety, equipment safety munication
system interference, etc.
Compensated neutral system belongs to the group of small current neutral
grounding system. The basic theory used to perform faulty feeder location in these
networks nowadays can be summarized as two categories: The first category uses the
electrical characteristics of work itself for analysis after the fault happened,
while methods of the second category are based on the means of external signal
injection into work. Due to the variety plexity of the practical faults
happened in reality, a perfect location strategy that meets all kinds of circumstances is
not yet discovered.
This thesis presents the zero prehensive increment method and the
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