Development Of Flywheel Inverter System For Voltage Sag Mitigation

Ishak, Ruhaizad (2006) Development Of Flywheel Inverter System For Voltage Sag Mitigation. Masters thesis, Universiti Putra Malaysia.

[img] PDF
269Kb

Abstract

Power quality is an issue that has been given a continuous attention by the electricity providers and also the consumers. Nowadays, the application of power electronic devices in the industrial sector has rapidly increased. Many of the equipment used in the industries are sensitive to an even small disturbance in power supply such as voltage sag. Voltage sag can cause low quality product, low production quantity and also machine restarting. The voltage sag problem can reduce the profit in long term if it is not given a proper attention.There are many type of solutions that have been developed to mitigate the voltage sag problem. The type of solution that is usually taken by the consumers is by installing energy storage device such as battery, capacitor and motor generator (MG) to inject the power back to the AC system during the voltage sag. In this work, a flywheel is used as the energy storage device. Flywheel has few advantages such as long life cycle, low maintenance work and also cheap. A DC machine has been used with the flywheel in this application. At normal condition, the flywheel stores kinetic energy during the rotation of the machine. The kinetic energy will be transformed to electrical energy when there is a sag in the AC system. In order to deliver the energy to the AC system, the flywheel is used with the static synchronous compensator (STATCOM) system. This system supplies reactive power to compensate the voltage loss during the sag. This work has been divided into two parts which are the simulation and the experiment part. Two types of faults which are balanced phase fault and unbalanced phase fault have been simulated. The balanced phase fault has been created by starting of large induction motor. On the other hand, the unbalanced phase fault has been created by performing a short circuit on the AC supply system. For the experiment part, this sag mitigation system has been tested under the balanced phase fault condition. From both the simulation and experiment results, a good agreement has been obtained. The mitigation system has shown a good ability in mitigating voltage sag problem.

Item Type:Thesis (Masters)
Subject:flywheels
Subject:Voltage regulators
Chairman Supervisor:Associate Professor Senan Mahmod, PhD
Call Number:FK 2006 103
Faculty or Institute:Faculty of Engineering
ID Code:5153
Deposited By: Nurul Hayatie Hashim
Deposited On:06 Apr 2010 06:50
Last Modified:27 May 2013 07:20

Repository Staff Only: Edit item detail

Document Download Statistics

This item has been downloaded for since 06 Apr 2010 06:50.

View statistics for "Development Of Flywheel Inverter System For Voltage Sag Mitigation"


Universiti Putra Malaysia Institutional Repository

Universiti Putra Malaysia Institutional Repository is an on-line digital archive that serves as a central collection and storage of scientific information and research at the Universiti Putra Malaysia.

Currently, the collections deposited in the IR consists of Master and PhD theses, Master and PhD Project Report, Journal Articles, Journal Bulletins, Conference Papers, UPM News, Newspaper Cuttings, Patents and Inaugural Lectures.

As the policy of the university does not permit users to view thesis in full text, access is only given to the first 24 pages only.