Estimation of electrical traction load harmonic impact on distribution networks

Author

Prudenzi, A.

Author_Institution

Electr. Eng. Dept., L´´Aquila Univ., Italy

Volume

2

fYear

2003

fDate

13-17 July 2003

Abstract

The paper deals with the time varying aspect of harmonics by facing the problem of harmonic impact estimation of DC electrified trains in operation in subway systems. To this aim, the paper illustrates the results of a detailed harmonic survey performed on such a system operating in an Italian city. The system provides railway lines supplied at 1,500 V DC through several AC-DC converters. The power supply of the system is provided at medium voltage (20 kV) from five different connections to the public distribution network. Fourteen AC-DC converter electrical substations (ESS) provide the total demand of the system of about 20 MW. In the paper, the problem of identifying the typical daily patterns of harmonic distortion due to the time-variant nonlinear traction load has been assessed. The results thus obtained are finally illustrated and discussed in due detail.

Keywords

AC-DC power convertors; distribution networks; harmonic distortion; power supply quality; power system harmonics; railway electrification; rapid transit systems; substations; time-varying systems; traction power supplies; 1500 V; 20 MW; 20 kV; AC-DC converter; DC electrified train; Italian city; electrical substation; harmonic distortion; harmonic impact estimation; harmonic survey; metro-transit system; public distribution network; railway line; time varying harmonics; time-variant nonlinear traction load; Cities and towns; Electronic switching systems; Harmonic distortion; Monitoring; Power supplies; Power system harmonics; Rail transportation; Substations; Time varying systems; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Engineering Society General Meeting, 2003, IEEE

Print_ISBN

0-7803-7989-6

Type

conf

DOI

10.1109/PES.2003.1270490

Filename

1270490