A systematic approach to hybrid railway power conditioner design with harmonic compensation for high speed railway To Get this projects Call : 9566355386 / 99625 88976 Visit : www.lemenizinfotech.com / www.ieeemaster.com Mail : projects@lemenizinfotech.com

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A Systematic Approach to Hybrid Railway
Power Conditioner Design with Harmonic
Compensation for High-Speed Railway
Abstract
There are various techniques to relieve the unbalance
problem, such as usage of Scott, YNvd, V/V, and impedance
matching transformers. However, due to traction load variations,
these solutions cannot completely compensate the unbalance
problem. The reactive power and harmonic portions can be
compensated by passive compensators such as capacitor banks
and filters. Compared with passive compensators, active
compensators can provide better dynamic and comprehensive
compensation. The most commonly used compensators in
traction power supply are static VAR compensator (SVC) and
static synchronous compensator (STATCOM). The
compensation performance using SVC for voltage regulation of
25-kV traction is explored. However, its dynamic response is
poor, and compensation results are not satisfactory when the
load is varying. Furthermore, the high-power SVC occupies a
large area. Hereafter, active power filter (APF) is proposed to
provide fast and dynamic response. Unfortunately, the device

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rating of APF is still too high. Compensation device based on
hybrid structure is therefore proposed for lower device rating.
Existing system
An RPC is comprised of pair self-commutated PWM
inverters. These inverters connected to the main phase and teaser
feeding buses, coupled with DC side capacitor such as back-to-
back (BTB) converter. In this way, the two self-commutated
inverters can act as a static var compensator (SVC) to
compensate the reactive power and as an active power
accommodator from one feeding bus to another.
Proposed system
In this paper, a novel hybrid power quality conditioner (HPQC)
is proposed for the co-phase power supply system. The HPQC
can achieve active power balancing, reactive power
compensation and harmonic filtering as pure APC in the co-
phase power supply system. However, the rating of the back-to-
back converter can be lower.

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LeMeniz Infotech
36, 100 Feet Road, Natesan Nagar, Near Indira Gandhi Statue,
Pondicherry-605 005.
Call: 0413-4205444, +91 9566355386, 99625 88976.
Web : www.lemenizinfotech.com / www.ieeemaster.com
Mail : projects@lemenizinfotech.com
Advantages
 Reduction in operation voltage can help to reduce the cost
and switching power loss.
Applications
 Electrified railways.

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LeMeniz Infotech
36, 100 Feet Road, Natesan Nagar, Near Indira Gandhi Statue,
Pondicherry-605 005.
Call: 0413-4205444, +91 9566355386, 99625 88976.
Web : www.lemenizinfotech.com / www.ieeemaster.com
Mail : projects@lemenizinfotech.com
Block diagram
LOAD
CONVERTER 2
WITH PASSIVE
FILTER
ENERGY
STORAGE
CONVERTER 1
WITH PASSIVE
FILTER
DRIVER
CIRCUIT
PIC CONTROLLER
WITH BUFFER
12V
DC
5V DC

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Copyright © 2015 LeMeniz Infotech. All rights reserved
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LeMeniz Infotech
36, 100 Feet Road, Natesan Nagar, Near Indira Gandhi Statue,
Pondicherry-605 005.
Call: 0413-4205444, +91 9566355386, 99625 88976.
Web : www.lemenizinfotech.com / www.ieeemaster.com
Mail : projects@lemenizinfotech.com
Tools and software
 MPLAB – microcontroller programming.
 ORCAD – circuit layout.
 MATLAB/Simulink – Simulation.