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Title: Advanced series compensation for transmission systems using a thyristor switched capacitor module

Abstract

Recent studies have shown that variable series compensation can be used as an effective method to improve stability and power flow control in modern power systems. To achieve this variable series compensation, small blocks or modules of capacitive reactance are cascaded and switched independently by thyristor pairs to achieve the required degree of compensation. The use of solid state switching provides increased speed, flexibility and reliability over the mechanically switched capacitors that have been previously considered. The specifications for the compensator require realizable and cost effective equipment which meets the technical requirements. Nonlinear simulations in the form of Electro-Magnetic Transients Program (EMTP) studies are used to verify that the design meets these requirements. In addition to the compensator design which is unique to this application, insight is provided into the criteria that must be considered when designing similar equipment for other applications. A method is also proposed to solve the problem of subsynchronous resonance (SSR). This method is based on the combination of static filters and thyristor switching, and is shown to be successful in controlling all SSR modes of the generator at any level of compensation. Finally, a controller is developed for the compensator and by allowing variation inmore » the level of compensation over a wide range, is shown to be effective in damping low frequency oscillations in the system.« less

Authors:
Publication Date:
Research Org.:
Clarkson Univ., Potsdam, NY (United States)
OSTI Identifier:
5064772
Resource Type:
Miscellaneous
Resource Relation:
Other Information: Thesis (Ph.D.)
Country of Publication:
United States
Language:
English
Subject:
24 POWER TRANSMISSION AND DISTRIBUTION; POWER SYSTEMS; POWER TRANSMISSION; STABILITY; CONTROL SYSTEMS; ELECTRIC GENERATORS; SWITCHING CIRCUITS; THYRISTORS; ELECTRONIC CIRCUITS; ENERGY SYSTEMS; SEMICONDUCTOR DEVICES; 240200* - Power System Networks, Transmission & Distribution- (1990-)

Citation Formats

Pilvelait, B R. Advanced series compensation for transmission systems using a thyristor switched capacitor module. United States: N. p., 1992. Web.
Pilvelait, B R. Advanced series compensation for transmission systems using a thyristor switched capacitor module. United States.
Pilvelait, B R. Wed . "Advanced series compensation for transmission systems using a thyristor switched capacitor module". United States.
@article{osti_5064772,
title = {Advanced series compensation for transmission systems using a thyristor switched capacitor module},
author = {Pilvelait, B R},
abstractNote = {Recent studies have shown that variable series compensation can be used as an effective method to improve stability and power flow control in modern power systems. To achieve this variable series compensation, small blocks or modules of capacitive reactance are cascaded and switched independently by thyristor pairs to achieve the required degree of compensation. The use of solid state switching provides increased speed, flexibility and reliability over the mechanically switched capacitors that have been previously considered. The specifications for the compensator require realizable and cost effective equipment which meets the technical requirements. Nonlinear simulations in the form of Electro-Magnetic Transients Program (EMTP) studies are used to verify that the design meets these requirements. In addition to the compensator design which is unique to this application, insight is provided into the criteria that must be considered when designing similar equipment for other applications. A method is also proposed to solve the problem of subsynchronous resonance (SSR). This method is based on the combination of static filters and thyristor switching, and is shown to be successful in controlling all SSR modes of the generator at any level of compensation. Finally, a controller is developed for the compensator and by allowing variation in the level of compensation over a wide range, is shown to be effective in damping low frequency oscillations in the system.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1992},
month = {1}
}

Miscellaneous:
Other availability
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