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Development of early warning methods for voltage instability in electric power system

Tai, Chia Wuen (2013) Development of early warning methods for voltage instability in electric power system. Masters thesis, Universiti Tun Hussein Onn Malaysia.


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Voltage collapse is still the biggest threat to the transmission system. It will involve large disturbance, non-linear and discontinuous dynamics. There are many approaches that have been explored to predict the distance of the point of voltage collapse. However, it is still lack of information that related to current system state. With the latest Phasor Measurement Units (PMU) technology, it can provide an alternate pathway to improve the current power system state estimation. Hence, it was of interest to develop better methods that could give an early warning for voltage collapse. This project report concerns the development of methods that can provide in a real time system monitoring fiom PhIU for an early warning of voltage collapse in the electric power systems. The algorithm to predict the distance of the points of collapse is based on the assumption that voltage instability is closely related to maximum loadability of a transmission network, thus the Thevenin impedance is equal to the apparent load impedance at the points of collapse. Few methods were being implemented to track the Thevenin equivalent parameters in order to get the Thevenin impedance and its voltage. Performance of the methods used in this project is based on the analyzed results for the points of voltage collapse.

Item Type: Thesis (Masters)
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK3001-3521 Distribution or transmission of electric power
Depositing User: Normajihan Abd. Rahman
Date Deposited: 14 Sep 2014 08:51
Last Modified: 14 Sep 2014 08:51
URI: http://eprints.uthm.edu.my/id/eprint/4756
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