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Title: Determination of load block compositions in load-shedding schemes

Abstract

Large disturbances, such as short-circuit faults on a power system, lead power plants into a transient operating mode. Disturbances may propagate over a wide area in the system and may affect groups of generators, loads, and the interconnected network. In some extreme cases, a network may be separated into islands. In these islands, the load demand and the power generated may not be balanced. When there is a deficiency in power generation, frequency and voltage will drop. A typical validation of frequency with time is shown in Fig. 1. If underfrequency occurs in an island, loads are rejected in stages by underfrequency relays according to a predetermined load-shedding scheme so that a balance of load and generation may be recovered and the nominal value of operating frequency may be regained. In the design of an underfrequency load-shedding scheme, it is necessary to determine (1) the maximum overload, (2) the number of load shedding states, (3) the amount of load to be shed in each stage, (4) the underfrequency relay settings, and (5) the load circuits that should be dropped in the load block at each stage.

Authors:
 [1];  [2]
  1. Univ. of Western Australia (AU)
  2. Electrical and Electronic Engineering at the Univ. of Western Australia (AU)
Publication Date:
OSTI Identifier:
6495500
Resource Type:
Journal Article
Journal Name:
IEEE Comput. Applicat. Power; (United States)
Additional Journal Information:
Journal Volume: 1:4
Country of Publication:
United States
Language:
English
Subject:
20 FOSSIL-FUELED POWER PLANTS; 29 ENERGY PLANNING, POLICY AND ECONOMY; 99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE; ELECTRIC GENERATORS; ELECTRICAL FAULTS; INTERCONNECTED POWER SYSTEMS; LOAD ANALYSIS; DISTURBANCES; DYNAMIC LOADS; ENERGY BALANCE; ENERGY DEMAND; LOGIC CIRCUITS; PROGRAMMING; RELAYS; VARIATIONS; DEMAND; ELECTRICAL EQUIPMENT; ELECTRONIC CIRCUITS; ENERGY SYSTEMS; EQUIPMENT; POWER SYSTEMS; 200104* - Fossil-Fueled Power Plants- Components; 296000 - Energy Planning & Policy- Electric Power; 990220 - Computers, Computerized Models, & Computer Programs- (1987-1989)

Citation Formats

Tsang, C P, and Wong, K P. Determination of load block compositions in load-shedding schemes. United States: N. p., 1988. Web. doi:10.1109/67.20552.
Tsang, C P, & Wong, K P. Determination of load block compositions in load-shedding schemes. United States. https://doi.org/10.1109/67.20552
Tsang, C P, and Wong, K P. 1988. "Determination of load block compositions in load-shedding schemes". United States. https://doi.org/10.1109/67.20552.
@article{osti_6495500,
title = {Determination of load block compositions in load-shedding schemes},
author = {Tsang, C P and Wong, K P},
abstractNote = {Large disturbances, such as short-circuit faults on a power system, lead power plants into a transient operating mode. Disturbances may propagate over a wide area in the system and may affect groups of generators, loads, and the interconnected network. In some extreme cases, a network may be separated into islands. In these islands, the load demand and the power generated may not be balanced. When there is a deficiency in power generation, frequency and voltage will drop. A typical validation of frequency with time is shown in Fig. 1. If underfrequency occurs in an island, loads are rejected in stages by underfrequency relays according to a predetermined load-shedding scheme so that a balance of load and generation may be recovered and the nominal value of operating frequency may be regained. In the design of an underfrequency load-shedding scheme, it is necessary to determine (1) the maximum overload, (2) the number of load shedding states, (3) the amount of load to be shed in each stage, (4) the underfrequency relay settings, and (5) the load circuits that should be dropped in the load block at each stage.},
doi = {10.1109/67.20552},
url = {https://www.osti.gov/biblio/6495500}, journal = {IEEE Comput. Applicat. Power; (United States)},
number = ,
volume = 1:4,
place = {United States},
year = {1988},
month = {10}
}