Next Article in Journal
A Multi-Objective Optimization Model for the Design of Biomass Co-Firing Networks Integrating Feedstock Quality Considerations
Next Article in Special Issue
Nature-Inspired Whale Optimization Algorithm for Optimal Coordination of Directional Overcurrent Relays in Power Systems
Previous Article in Journal
Forecasting of Coal Demand in China Based on Support Vector Machine Optimized by the Improved Gravitational Search Algorithm
Previous Article in Special Issue
Energy Management Optimization and Voltage Evaluation for Residential and Commercial Areas
Article Menu

Export Article

Open AccessArticle

Suggestion of a New Protection Scheme for a Transmission System Equipped with a Thyristor-Controlled Series Capacitor

1
Department of Electrical Engineering, Changwon National University, Changwon 51140, Korea
2
Korea Electric Power Research Institute, Seoul 34056, Korea
*
Author to whom correspondence should be addressed.
Energies 2019, 12(12), 2250; https://doi.org/10.3390/en12122250
Received: 3 May 2019 / Revised: 1 June 2019 / Accepted: 10 June 2019 / Published: 12 June 2019
(This article belongs to the Special Issue Electric Power Systems Research 2019)
  |  
PDF [15339 KB, uploaded 13 June 2019]
  |  

Abstract

A thyristor-controlled series capacitor (TCSC) is employed to a transmission line in order to enhance the usable capacity of the present as well as upgraded lines, improve system stability, reduce losses, and improve power flow control capability. However, in an abnormal situation, the TCSC may transit from the existing operation mode to the other mode according to its control system and protection strategy. There is much difference in the impedance of the TCSC between each mode. This threatens the reliability of the conventional protection system, especially the distance relay, that works based on the measurement of line impedance. In this paper, we suggest a new protection scheme for a distance relay of a transmission line equipped with a TCSC. In the suggested method, in order to mitigate the effect of the TCSC in the fault loop, the TCSC injected voltage is subtracted from the measured phase voltage before supplying the voltage signal to the distance relay. The suggested scheme was verified by a real time digital simulator (RTDS)-based closed-loop test bed of a protective relay. The effect of the TCSC in the fault loop was completely mitigated. The distance relay works properly with the suggested scheme. View Full-Text
Keywords: fixed series capacitor (FSC); new protection scheme; RTDS; transmission system; TCSC fixed series capacitor (FSC); new protection scheme; RTDS; transmission system; TCSC
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Dinh, M.-C.; Tran, M.-Q.; Lee, J.-I.; Lee, S.-J.; Lee, C.H.; Yoon, J.; Park, M. Suggestion of a New Protection Scheme for a Transmission System Equipped with a Thyristor-Controlled Series Capacitor. Energies 2019, 12, 2250.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Energies EISSN 1996-1073 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top