﻿ 架空线路参数计算方案研究 Research on Calculation Scheme of Overhead Line Parameters

Journal of Electrical Engineering
Vol.04 No.03(2016), Article ID:18556,5 pages
10.12677/JEE.2016.43021

Research on Calculation Scheme of Overhead Line Parameters

Min Cao1, Furong Yin2, Yun Xia3

1Electric Power Science Research Institute of Yunnan Power Grid Co., Ltd., Kunming Yunnan

2Guangzhou Zenithsun Technology Co., Ltd., Guangzhou Guangdong

3Beijing Yin Diagram Simulation Technology Co., Ltd., Beijing

Received: Aug. 30th, 2016; accepted: Sep. 17th, 2016; published: Sep. 20th, 2016

ABSTRACT

As the relay protection effect on the stability of power grid is more and more big, the accuracy of the relay protection setting value is becoming more and more important. And in the process of relay protection setting calculation, overhead line parameters are very important basic data. Traditional calculation method, without considering the tower connection form leads to problem of inaccurate calculation results. This paper according to the overhead line parameters calculation schemes provided by a relay protection department, studied each tower connection form of processing and where each line belongs to, and put forward the existing problems and improvement ideas.

Keywords:Relay Protection, Overhead Line Parameters, A Formula to Calculate

1云南电网有限责任公司电力科学研究院，云南 昆明

2广州致讯信息科技有限责任公司，广东 广州

3北京殷图仿真技术有限公司，北京

1. 引言

2. 架空线路参数计算公式

2.1. 单位正序阻抗

2.2. 单位零序阻抗

3. 架空线路参数计算方案

1) 先根据本文第2章节所述的计算公式以及2个厂站间杆塔的接线形式 [3] ，计算出每个杆塔所接架空线的单位正序阻抗、单位零序阻抗

Table 1. Definition of the formula variable

Table 2. Units of positive sequence impedance calculation formula

2) 再根据一定的规则算出每个杆塔所接架空线的长度，本方案采取的规则为：首厂站到杆塔1以及杆塔1到杆塔2之间的线路属于杆塔1；杆塔2到杆塔3之间的线路属于杆塔2；依次类推，一直到杆塔n到末厂站之间的线路属于杆塔n结束。

Table 3. Formula for calculating unit zero sequence impedance

Figure 1. Schematic diagram of overhead line

3) 用每个杆塔的单位正序阻抗以及单位零序阻抗，乘以属于各杆塔的线路长度，得出属于各杆塔的线路正序以及零序阻抗。

4) 将各个杆塔的线路正序阻抗以及零序阻抗相加，得出首厂站到末厂站之间的架空线路阻抗参数。

4. 架空线路参数计算改进思路

4.1. 存在的问题

4.2. 改进的思路

5. 结语

Research on Calculation Scheme of Overhead Line Parameters[J]. 电气工程, 2016, 04(03): 168-172. http://dx.doi.org/10.12677/JEE.2016.43021

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