卢旺达东部省输电线路升级改造后电磁环境的变化分析

摘要

传输线升级不仅可以提高高压传输线容量，而且可以产生更高的经济效益和减轻环境压力，也是成为当今电网发展的主流趋势。然而随着传输线容量的提高，电场、电晕损耗、可听噪声和无线电干扰等问题也随之而来。 本文首先从不同思路和和角度展示了提高传输线容量的方法和措施。其次，使用MATLAB对传输线导体表面的对地电场进行了大量计算，从中得到卢旺达东部省电力系统传输线电晕损耗、可听噪声和无线电干扰等参数。并将这些仿真数据和标准数据进行了对比，同时分析了仿真获取的数据有限性。本文是卢旺达东部省的电力系统传输网优化基础，对传输线周边的环境改善有极大帮助，是未来卢旺达东部省的电力系统发展的一个重要的方向。

目录

声明

摘要

Abstract

TABLE OF CONTENTS

Chap．1 Introduction

1．1 Aims and objectives of the research

1．2 Justification for and introduction to the research

1．3 Organization of the Thesis

Chap2．Rwanda power system status and upgrading transmission line

2．1 Present and planned electrical power systems in Rwanda

2．1．1 Short history of EWSA

2．1．2 Electricity generation

2．1．3 Electricity transmission and distribution network

2．1．4 Medium and low voltage distribution network

2．2 Upgrading transmission line overview

2．2．1 Needy for upgrading transmission line

2．2．2 Alternatives for upgrading transmission line

Chap3．Methodology for calculating electric field strength，corona loss，audible noise and radio interference

3．1 Electric field at the surface of the conductor

3．2 Electric fields at the ground level (1m above ground)

3．3 corona loss

3．4 Audible noise (AN)

3．5 Radio interference (RI)

Chap4．Determination of Electric field strength for Rwanda electric Transmission System

4．1 Determination of electric field on the surface of the conductor

4．2 Determination of ground level electric field strength

4．3 Comparing obtained value with the limitations by standards

Chap5．Determination of corona loss，audible noise and radio interference for Rwanda Electric Transmission System

5．1 Determination of corona loss

5．2 Determination of audible noise

5．3 Determination of radio interference

5．4 Comparing obtained value with the limitations by standards

Chap 6．Conclusion and future work

References

Acknowledgements