Load shedding scheme for the two-area system with linear quadratic regulator

2013年第7卷第1期

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《能源前沿（英文）》 >> 2013年第7卷第1期 doi: 10.1007/s11708-012-0224-8

Load shedding scheme for the two-area system with linear quadratic regulator

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Department of Electrical Engineering, National Institute of Technology, Kurukshetra 136119, India

发布日期：2013-03-05

摘要

The power system is prone to many emergency conditions which may lead to emergency state of operation with decay in the system frequency. The dramatic change in the frequency can result in cascaded failure of the system. In order to avoid power system collapse, load shedding (LS) schemes are adopted with the optimal amount of load shed. This paper proposed a methodology in a two-area thermal-thermal system for finding the required amount of load to be shed for setting the frequency of the system within minimum allowable limits. The LS steps have been obtained based on the rate of change of frequency with the increase in load in steps. A systematic study has been conducted for three scenarios: the scheme with a conventional integral controller; the scheme with a linear quadratic regulator (LQR); and the scheme with an LQR and superconducting magnetic energy storage devices (SMES). A comparison of the results has been presented on the two-area system.

关键词

critical load ; frequency response ; load shedding (LS) ; multi-area system ; rate of change of frequency ; linear quadratic regulator (LQR) ; superconducting magnetic energy storage devices (SMES)

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