A thyristor controlled series compensator model for the power flow solution of practical power networks

Abstract

A new and comprehensive load flow model for the Thyristor Controlled Series Compensator (TCSC) is presented in this paper. In this model the state variable is the TCSC's firing angle, which is combined with the nodal voltage mugnitudes and angles of the entire network in a single frame-of-reference for a unified iterative solution through a Newton-Raphson method. Unlike TCSC models available in the open literature, this model takes account of the loop current that exists in the TCSC under both partial and full conduction operating modes. Also, the model takes proper care of the resonant points exhibited by the TCSC fundamental frequency impedance. The Newton-Raphson algorithm exhibits quadratic or near-quadratic convergence characteristics, regardless of the size of the network and the number of TCSC devices. Index Terms-FACTS, Newton-Raphson, Power Flow Control, TCSC.

A comparison of fuzzy logic and PID controllers to control transmitted power using a TCSC

“…There are also some attempts to derive an accurate model of the TCSC considering harmonics [1][2][3][4][5][6]. In [1], X T CSC was obtained as follows:…”

“…In [3,4], a complete load flow model for the TCSC was proposed by considering all of the harmonics of line currents. A variety of model-based control schemes can be found in [5][6][7], which express the adaptability at higher frequencies and are useful in SSR studies.…”

“…In this respect, flexible AC transmission systems (FACTS) technology has been proposed to provide the actual capacity without the requirement of new transmission lines or reconfiguration [1]. The thyristor-controlled series capacitor (TCSC), as a significant member of the FACTS family, has been applied to solve diverse problems, such as scheduling fast power flow, limiting short-circuit currents, regulating continuous reactance, mitigating subsynchronous resonance (SSR), damping the power oscillation, or enhancing transient stability [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17].…”

Optimal Power Flow Solution of the Algerian Electrical Network using Differential Evolution Algorithm

“…The application of FACTS in electric power system is intended for the control of power flow, improvement of stability, voltage profile management, power factor correction, and loss minimization [9][10][11][12]. Power flow through an ac line is a function of phase angle, line and voltages and line impedance.…”

Assessment of Voltage Stability Using Network Equivalent

“…Researchers have developed mathematical model of FACTS controllers to incorporate them in modern power system analysis. Research is continuing to find suitable FACTS controller for a particular system operation [10], [11].…”