Adaptive Distance Protection for Transmission Lines Incorporating SSSC With Energy Storage Device

H. V. Gururaja Rao,Nagesh Prabhu,R. C. Mala

doi:10.1109/access.2020.3019173

Abstract

A Static Synchronous Series Compensator incorporating energy storage device (SSSC-ES) at the DC bus enables the exchange of true power with the system in addition to line reactance compensation. This facilitates improved control of real and reactive power in a transmission system. However, the four-quadrant operation of SSSC presents additional problems for the accurate operation of conventional transmission line protection. In this paper, an in-depth analysis of the effect of emulated reactance and resistance by SSSC-ES installed at the center of a hybrid series compensated line on the performance of distance relay is carried out. An investigation is performed with all possible operating modes and control strategies of SSSC-ES, and the possibility of mal-operation of distance protection are explored. A novel adaptive setting based on constant reactance and constant resistance emulation control strategy of SSSC is proposed for quadrilateral distance relay to prevent the mal-operation. MATLAB / SIMULINK is used for the simulation study.

Highlights

FACTS controllers make the AC transmission system flexible by enhancing system controllability and power transfer capability [1]–[3]
Series FACTS controllers are mainly used to compensate for the line reactance and to control power transfer in long transmission lines
Series FACTS controllers enhance the transient stability of a mixed AC/DC system [4]

Summary

Introduction

FACTS controllers make the AC transmission system flexible by enhancing system controllability and power transfer capability [1]–[3]. Series FACTS controllers are mainly used to compensate for the line reactance and to control power transfer in long transmission lines. Series FACTS controllers enhance the transient stability of a mixed AC/DC system [4]. An added advantage of SSSC is the provision for integrating an energy storage device (battery, fuel cell, or Super Conducting Magnetic Energy Storage) for real power supply/absorption. It results in ‘‘enhancement of power transfer control, transient stability improvement, and power oscillation damping’’ [6]

Objectives

Results

Conclusion