Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
PSpice Modeling of Electrified Railway Propulsion Drive Rectifiers for Harmonic Analysis
KTH, School of Electrical Engineering (EES), Electromagnetic Engineering. (Division of Electromagnetic Engineering)
KTH, School of Electrical Engineering (EES), Electromagnetic Engineering.ORCID iD: 0000-0002-1607-2493
2009 (English)In: ITST: 2009 9TH INTERNATIONAL CONFERENCE ON INTELLIGENT TRANSPORT SYSTEMS TELECOMMUNICATIONS, New York: IEEE , 2009, 113-116 p.Conference paper, Published paper (Refereed)
Abstract [en]

A method to construct the electrified railway propulsion drive rectifier in PSpice for EMC assessment is developed. The working mechanisms of a three level NPC PWM rectifier and its logical signal generator are elaborated. Besides that, the convergence problem of PSpice is explained and the proper parametric settings for simulation in this paper are given. At last, the noise spectra for two different loads are compared and the causes for this difference are discussed as well.

Place, publisher, year, edition, pages
New York: IEEE , 2009. 113-116 p.
Keyword [en]
three level PWM rectifier, PSpice, Propulsion drive, harmonic analysis
National Category
Telecommunications Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:kth:diva-29681ISI: 000279343400021Scopus ID: 2-s2.0-77950490954OAI: oai:DiVA.org:kth-29681DiVA: diva2:398627
Conference
9th International Conference on Intelligent Transport Systems Telecommunications
Note
QC 20110218Available from: 2011-02-18 Created: 2011-02-11 Last updated: 2012-06-04Bibliographically approved
In thesis
1. Electromagnetic noise generated in the electrified railway propulsion system
Open this publication in new window or tab >>Electromagnetic noise generated in the electrified railway propulsion system
2011 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

The electromagnetic compatibility (EMC) problem in the railway propulsion system is a significant safety issue of high concern. The problems can be caused by any part of the propulsion system as well as any combination of the sub systems. Simulation is a fast economical way to understand the system and to predict the EMC performance. In this thesis, the propulsion system is studied partly from the rectifier to the motor. To simulate the rectifier, a two level pulse width modulation (PWM) controlled rectifier is built in Simulink. Time domain line current as well as frequency domain spectra is studied. The spectrum changing according to time variation is obtained. In order to study the high derivative of switching pulse in the insulated gate bipolar transistor (IGBT), a simple circuit is proposed to investigate it. The high frequency noise spectrum is given and the variation of the spectrum due to the reverse recovery time of the ant-parallel diode is also demonstrated.

Transmission line theory is used to model the cable used to connect the inverter and motor. The method to extract the characteristic capacitance and inductance matrices of the cable system is presented. Decoupling these characteristic matrices is required for modeling the multiconductor transmission line (MTL) in PSpice. A simple way to decouple them is thus proposed here. Through the simulation studies, we analyze the oscillation and overvoltage in the cable. A fourth cable with optimized layout is also illustrated here to reduce the oscillation on the line. Furthermore, the relationship between the length of line and the noise frequency is studied.

Shielding is another way to reduce the electromagnetic (EM) coupling of power lines. The method to model shielded cables in PSpice is given in this thesis. Based on the model we have investigated the shielding effect and analyzed the impact of different grounding conditions on the shielding performance.

Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2011. 50 p.
Series
Trita-EE, ISSN 1653-5146 ; 2011:011
Keyword
Electromagnetic compatibility, railway, propulsion system, shielded cable, transmission line
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering Telecommunications
Research subject
SRA - Transport
Identifiers
urn:nbn:se:kth:diva-31581 (URN)978-91-7415-873-1 (ISBN)
Presentation
2011-03-28, V3, KTH, Teknikringen 72, Stockholm, 10:00 (English)
Opponent
Supervisors
Funder
TrenOp, Transport Research Environment with Novel Perspectives
Note
QC 20110321Available from: 2011-03-21 Created: 2011-03-18 Last updated: 2011-03-21Bibliographically approved
2. High Frequency Model of Electrified Railway Propulsion System for EMC Analysis
Open this publication in new window or tab >>High Frequency Model of Electrified Railway Propulsion System for EMC Analysis
2012 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

A model of the electrified railway propulsion system working in a wide frequency range is studied in this thesis. The high frequency modeling is the first stage to study and predict the Electromagnetic compatibility (EMC) problems in the electrified railway propulsion system, which are safety and reliability issues of high concern. Modeling methods and models for the line converter, motor power supply module, and the traction motor are developed. These models can work individually or be combined together to simulate the main part of the electrified railway propulsion system.

A two level pulse width modulation (PWM) controlled rectifier used in propulsion system is built in Simulink. It provides different values of DC voltage for DC-link according to design requirements. Time domain line current as well as frequency domain spectra is studied. Harmonic value based on variation in time is given to better understand the behavior of the rectifier. High value of harmonics is found during starting time. The steady-state harmonics are also demonstrated.

For the motor power supply module modeling, multitransmission line theory is used to model the cable used to connect the inverter and motor. A decoupling method to solve N multiconductor transmission lines into N single transmission lines in PSpice is developed and verified. Through simulation, the oscillation and overvoltage in the cable according to different layouts and length of cable are studied. The electromagnetic (EM) noise is dependent on the length of cables. A fourth grounded cable with optimized layout is introduced to reduce the oscillation on the line. By using this method, for the cable layout considered, the magnitude of the oscillation is reduced significantly from 19.48 V at 5.245 MHz to 2.1 V at 4.609 MHz for the 14 meter cable configuration.

In order to improve accuracy of the modeling of propulsion system, a method to represent a traction motor with high accuracy in a wide frequency range in PSpice is presented. This model is based on vector fitting and synthesis of rational function in PSpice by equivalent circuits. It provides a new concept to model the traction motor for EM investigation compared with conventional circuit models. The simulated data can approach the measured data with extremely small error when high order of circuit is used. Verification of this method was done on a 200 kW induction motor. The relative simplicity of this method makes it a good candidate for analysis of industrialized traction motors.

Fast transients induced by reverse-recovery of diodes in pre-charger or short circuit in power supplies are also studied, and it is possible to include them in the proposed model for propulsion system to study their impacts on the system from the EMC point of view. The fast transients with high magnitude are hazardous to the safe operation of the train. A test setup is proposed to study the fast transients caused by output diodes in the pre-charger. In the test setup, one efficient method to eliminate the contact bounce in the IGBT control circuit is also proposed. The voltage responses of the diode may be two or more times higher than the reverse bias voltage when nonlinear behavior of diode happens. A snubber, which has much bigger capacitor than conventional ones, is applied to solve the problem. The effect and robust operation of this snubber is experimentally verified. The overshoot voltage with snubber is reduced to less than 1.2 kV, which is about 60% of that without snubber, when the reverse bias is 1 kV.

Short circuit may also lead to fast transient in the traction system. As there are numerous DC-DC converters in the propulsion system, especially in the auxiliary system, the importance of equipping short circuit protection circuit in power supplies is obvious. A test setup is proposed to study the fast transient induced by short circuit. An effective circuit, which has been experimentally verified, is proposed to reduce the transient current when short circuit occurs. As shown in the example converter, the peak value of the transient current resulting from short circuit is reduced to one fifth of that without protection circuit.

Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2012. 83 p.
Series
Trita-EE, ISSN 1653-5146
Keyword
Electromagnetic compatibility, railway, propulsion system, multitransmission line, ac motor modeling, vector fitting, fast transient
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:kth:diva-96230 (URN)978-91-7501-376-3 (ISBN)
Public defence
2012-06-11, sal F3, Lindstedtsv. 26, KTH, Stockholm, 10:00 (English)
Opponent
Supervisors
Note
QC 20120604Available from: 2012-06-04 Created: 2012-05-31 Last updated: 2012-06-04Bibliographically approved

Open Access in DiVA

No full text

Scopus

Authority records BETA

Thottappillil, Rajeev

Search in DiVA

By author/editor
Jia, KelinThottappillil, Rajeev
By organisation
Electromagnetic Engineering
TelecommunicationsOther Electrical Engineering, Electronic Engineering, Information Engineering

Search outside of DiVA

GoogleGoogle Scholar

urn-nbn

Altmetric score

urn-nbn
Total: 156 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf