Distribution Capacitance Calculation and Reactive Power Compensation of Cable Line

LI Yan; LIU Yunpeng; MU Quanru

doi:10.14044/j.1674-1757.pcrpc.2020.05.001

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Distribution Capacitance Calculation and Reactive Power Compensation of Cable Line

更新时间：2024-09-14

- Distribution Capacitance Calculation and Reactive Power Compensation of Cable Line
- POWER CAPACITOR & REACTIVE POWER COMPENSATION Vol. 41, Issue 5, Pages: 1-5(2020)
- 作者机构：
  
  1. 华北电力大学河北省输变电设备安全防御重点实验室
  2. 华北电力大学新能源电力系统国家重点实验室
  3. 保定市鑫通电器设备有限公司
- 作者简介：
- 基金信息：
- DOI：10.14044/j.1674-1757.pcrpc.2020.05.001
  CLC： TM761.12;TM75
- Published：2020，
- 稿件说明：
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[1]李岩,刘云鹏,穆全儒.电缆贯通线分布电容计算方法及无功补偿[J].电力电容器与无功补偿,2020,41(05):1-5.

LI YAN, LIU YUNPENG, MU QUANRU. Distribution Capacitance Calculation and Reactive Power Compensation of Cable Line. [J]. Power capacitor & reactive power compensation, 2020, 41(5): 1-5.
[1]李岩,刘云鹏,穆全儒.电缆贯通线分布电容计算方法及无功补偿[J].电力电容器与无功补偿,2020,41(05):1-5. DOI： 10.14044/j.1674-1757.pcrpc.2020.05.001.

LI YAN, LIU YUNPENG, MU QUANRU. Distribution Capacitance Calculation and Reactive Power Compensation of Cable Line. [J]. Power capacitor & reactive power compensation, 2020, 41(5): 1-5. DOI： 10.14044/j.1674-1757.pcrpc.2020.05.001.

摘要

铁路10 kV电力贯通线中电缆比例逐渐增高

由于电缆分布电容大

负荷较轻时易导致功率因数低。为了补偿无功

需对电缆分布电容进行评估

给出了单芯电缆分布电容计算公式

利用有限元方法计算三芯电缆线路分布电容。提出一种基于电抗调压式动态无功补偿装置

通过真空有载分接开关配合自耦变压器完成电压调节。装置根据用电负荷

改变真空有载分接开关的档位

实现铁路贯通线的无功调节。介绍真空有载分接开关特性和动作时序过程

运用有限元方法针对实际三芯电缆线路设计补偿容量并制作补偿装置

样机挂网运行后进行现场测试。现场运行数据证实了分布电容计算方法以及无功补偿方案的适用性。

Abstract

With the gradual increase of proportion of cables in 10 kV power lines for railway.The power factor is low due to big distribution capacitance of cable in case of light load.For the reactive power compensation

the distribution c apacitance of cable needs evaluation.The c alculation formula of distributed capacitance of single-core cable is given.Capacitance for three-core cable line is calculated by finite element method.A kind of reactive power compensation device based on reactance voltage regulation is proposed.The voltage regulation is completed by a vacuum on-load tap-changer（OLTC） with auto transformer.The device changes the gear of the OLTC in accordance with the electrical load so to achieve reactive power regulation of railway line.Both the feature and operation time sequence process of the OLTC is presented.Compensation capacity for the three-core cable line is designed and the compensation device is made by the use of FEM and the sample is subject to site test after operation in the network.The calculation method of distributed capacitance and the suitability of the reactive power compensation proposal are proved by the site operation data.

关键词

动态无功补偿铁路有载分接开关

Keywords

dynamic reactive power compensationrailwayon-load tap-changer

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