A new approach of under-frequency load shedding technique in an islanded distribution network

Karimi, M. and Mohamad, H. and Mokhlis, Hazlie and Bakar, A.H.A. (2012) A new approach of under-frequency load shedding technique in an islanded distribution network. International Review of Electrical Engineering, 7 (2). pp. 4155-4162. ISSN 18276660

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Abstract

Under-frequency load shedding is a common technique to maintain the power system stability by removing the overload in some part of the system. The existing under-frequency load shedding schemes operate successfully in the interconnected grid system. A particular approach of under-frequency load shedding scheme is required for an islanded system which is known to be not as strong as the grid. This paper presents a new approach of load shedding scheme in an islanded distribution system incorporating distribution state estimation. The scheme is based on an intelligent technique to reduce the effect of power deficiency in an islanded network. The disturbance magnitude is calculated based on rate of change of frequency by using the simplest expression of the generator swing equation. Moreover, the process for assessing the power consumption of the customer can be achieved by state estimation method. In this paper, state estimation for a distribution network is developed and enhanced by composite load model to obtain the most practical value of the system state variables. Finally, the calculated value of the disturbance magnitude will be shed according to the estimated value of loads in each bus.

Item Type: Article
Additional Information: Cited By (since 1996):1 Export Date: 17 April 2013 Source: Scopus Language of Original Document: English Correspondence Address: Karimi, M.; Departement of Electrical Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia References: Aghamohammadi, M.R., Shahmohammadi, A., Intentional islanding using a new algorithm based on ant search mechanism (2011) International Journal of Electrical Power & Energy Systems; Mohamad, H., Mokhlis, H., Ab-Halim, A.B., Ping, H.W., A review on islanding operation and control for distribution network connected with small hydro power plant (2011) Renewable and Sustainable Energy Reviews, 15, pp. 3952-3962; Photovoltaics, D.G., Storage, E., (2011) IEEE Guide For Design, Operation, and Integration of Distributed Resource Island Systems With Electric Power Systems; (2000) IEEE Recommended Practice For Utility Interface of Photovoltaic (PV) Systems, p. 1. , IEEE Std 929-2000; (2003) IEEE Standard For Interconnecting Distributed Resources With Electric Power Systems, pp. 1-16. , IEEE Std 1547-2003; 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Uncontrolled Keywords: Distributed generation; Distribution network; Distribution state estimation; Islanding; Under-frequency load shedding
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Engineering
Depositing User: Mr Jenal S
Date Deposited: 10 Jul 2013 08:42
Last Modified: 09 Oct 2019 09:22
URI: http://eprints.um.edu.my/id/eprint/7827

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