The IUP Journal of Electrical and Electronics Engineering
Influence of SVC Supplementary Controls on the Transient Performance of Power System

Article Details
Pub. Date : April, 2021
Product Name : The IUP Journal of Electrical and Electronics Engineering
Product Type : Article
Product Code : IJEEE10421
Author Name : P V Balasubrahmanyam*
Availability : YES
Subject/Domain : Engineering
Download Format : PDF Format
No. of Pages : 20

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Abstract

Static Var compensators (SVC) are located along the line to maintain constant voltage profile at different loading conditions, increase power transfer capability and maintain stability of the system. Power system modeling is an important task while analyzing the performance of long distance Static Var Compensated transmission system. The paper focuses on selection of suitable supplementary signal to SVC, while considering detailed machine model.


Description

Transmission of power over long distances from generating stations to distant areas of loads is severely limited by stability and voltage regulation issues. Among the technical solutions suggested to solve these difficulties and to make long distance AC transmission feasible and economically advantageous, reactive power (VAR) compensation is a viable option and is finding increasing application. In particular, it has been found that Static Var Compensators (SVCs) located at intermediate points of transmission line can maintain specific voltage profile and can limit the voltage and frequency deviations under disturbances. The inherent ability of SVC is to provide rapid and continuously controllable reactive power compensation in response to changing system conditions. Many systems for which SVC has been considered involve transmission of bulk power over long distances from remote sources of generation. Such systems tend to be poorly damped and their high series compensation may be relatively ineffective.

In this paper, design of supplementary control signals to SVC for improvement of the transient performance is considered. The overall performance of the VAR system is ensured by conducting nonlinear simulation under fault and load change conditions. Stability study of power systems compensated by Thyristor controlled SVCs is carried out with detailed Synchronous Voltage Source (SVS) models of control systems, network transients and synchronous generator.


Keywords

Damping of power oscillations, Minimize voltage deviations, Stability, Power system modeling, Supplementary control signal to SVC, Equal damping criterion

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