Modelling load balance type static var compensator control system response

Dawson, Kim Maree (2005) Modelling load balance type static var compensator control system response. [USQ Project] (Unpublished)


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As power system interconnection becomes more prevalent, there has been an increase in use
of thyristor controlled shunt connected compensation devices for dynamic power system
compensation and power transmission capacity increase. A Static Var Compensator (SVC)
functions as a variable reactance capable of operating in both the inductive and capacitive
region as required on a cycle by cycle basis to provide compensation at the point of
connection to the power system.
Voltage regulation is the operational objective of most SVCs. Therefore, transient response
of SVC control systems impacts overall power system performance and inappropriate
settings may lead to voltage instability. SVCs are also commonly used to convert single
phase load into balanced three phase load, thereby reducing negative phase sequence
voltages and currents within the power transmission system. As most load balancing SVCs
are consistently operated to their capacity, removal from service to apply and test control
system setting changes impacts system regulation and stability. Therefore, model
development of a load balancing type SVC control system to predict response to setting
changes may provide an alternative to lengthy outages of SVC plant.
This paper examines the theoretical basis of thyristor controlled shunt compensation,
establishing conditions for voltage support and unbalanced load compensation. Load
balancing type SVC control system model development and validation is documented.

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Item Type: USQ Project
Refereed: No
Item Status: Live Archive
Depositing User: epEditor USQ
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Electrical, Electronic and Computer Engineering
Date Deposited: 11 Oct 2007 00:22
Last Modified: 02 Jul 2013 22:32
Uncontrolled Keywords: static var compensator (SVC), thyristor, voltage, waveforms
Fields of Research (FoR): 09 Engineering > 0906 Electrical and Electronic Engineering > 090602 Control Systems, Robotics and Automation

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