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Line voltage stability indices based on precautionary measure approximation in smart grid

Goh, Hui Hwang and Chua, Q. S. and Lee, S. W. and Kok, Boon Ching and Goh, Kai Chen and Teo, K. T. K. (2014) Line voltage stability indices based on precautionary measure approximation in smart grid. In: Proceedings of the 11th International Conference of Innovation and Management (ICIM 2014), 17-19 November 2014, Vaasa, Finland.


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Voltage stability and voltage collapse issues have in recent years begun to constitute an unpleasant warning to the operational security of power systems. In consequence, the significances to develop preferable methods that would provide a preliminary warning before the voltage collapse had grabbed the attention. This paper considered the implementation of real-time system monitoring methods that able to provide a timely warning in the power system before the voltage collapse occurred. Different line voltage stability indices such as line stability index (Lmn) and voltage collapse point indicator (VCPI) were executed to resolve their performance. The main intension is to recognize which index is most applicable for being adopted in power system control and security applications. Therefore, the time-domain results were used to calculate the line stability indices and to ratify with voltage stability indices theory. The line stability indices were tested in the smaller IEEE 9-bus test case and a larger IEEE 30-bus test case. The PowerWorld simulator was used to provide the time-domain results. Then, the results from the simulation were used to calculate the line stability indices by using Matlab. All the indices were found consistent with the theoretical background. In order to differentiate the performance and the robustness of the indices, the line stability indices’ accuracy was evaluated. From the results in IEEE 9-bus test case and IEEE 30-bus test case, VCPI was found to have the best accuracy performances in reflecting the stability of the power systems

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: power systems; voltage collapse; voltage stability; voltage stability indices
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK1001-1841 Production of electric energy or power. Powerplants. Central stations
Divisions: Faculty of Electrical and Electronic Engineering > Department of Electrical Power Engineering
Depositing User: Mrs. Nurhayati Ali
Date Deposited: 29 Mar 2015 06:40
Last Modified: 29 Mar 2015 06:40
URI: http://eprints.uthm.edu.my/id/eprint/6697
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