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Title: Improvement of transient stability using unified power flow controller

Abstract

The aim of the paper is to analyze the effect of an Unified Power Flow Controller (UPFC) on transient stability margin enhancement of a longitudinal system. To utilize the UPFC possibilities fully, the three controllable UPFC parameters were determined during the digital simulation process performed by the NETOMAC simulation program. The basis for determination of the suitable damping strategy and for determination of the optimal UPFC parameters is a mathematical model, which describes the interdependence between longitudinal transmission system parameters, operating conditions and UPFC parameters in the form of analytical equations. On the basis of the mathematical model, the theoretical UPFC limits were also detected, and their appearance explained.

Authors:
;  [1];  [2]
  1. Faculty of Electrical Engineering and Computer Science, Ljubljana (Slovenia)
  2. Siemens AG, Erlangen (Germany)
Publication Date:
OSTI Identifier:
218331
Report Number(s):
CONF-950103-
Journal ID: ITPDE5; ISSN 0885-8977; TRN: IM9619%%52
Resource Type:
Journal Article
Resource Relation:
Journal Name: IEEE Transactions on Power Delivery; Journal Volume: 11; Journal Issue: 1; Conference: Winter meeting of the IEEE Power Engineering Society, New York, NY (United States), 29 Jan - 2 Feb 1995; Other Information: PBD: Jan 1996
Country of Publication:
United States
Language:
English
Subject:
24 POWER TRANSMISSION AND DISTRIBUTION; POWER SYSTEMS; STABILITY; ELECTRICAL TRANSIENTS; ELECTRIC CONTROLLERS; COMPUTERIZED SIMULATION

Citation Formats

Mihalic, R., Zunko, P., and Povh, D.. Improvement of transient stability using unified power flow controller. United States: N. p., 1996. Web. doi:10.1109/61.484133.
Mihalic, R., Zunko, P., & Povh, D.. Improvement of transient stability using unified power flow controller. United States. doi:10.1109/61.484133.
Mihalic, R., Zunko, P., and Povh, D.. Mon . "Improvement of transient stability using unified power flow controller". United States. doi:10.1109/61.484133.
@article{osti_218331,
title = {Improvement of transient stability using unified power flow controller},
author = {Mihalic, R. and Zunko, P. and Povh, D.},
abstractNote = {The aim of the paper is to analyze the effect of an Unified Power Flow Controller (UPFC) on transient stability margin enhancement of a longitudinal system. To utilize the UPFC possibilities fully, the three controllable UPFC parameters were determined during the digital simulation process performed by the NETOMAC simulation program. The basis for determination of the suitable damping strategy and for determination of the optimal UPFC parameters is a mathematical model, which describes the interdependence between longitudinal transmission system parameters, operating conditions and UPFC parameters in the form of analytical equations. On the basis of the mathematical model, the theoretical UPFC limits were also detected, and their appearance explained.},
doi = {10.1109/61.484133},
journal = {IEEE Transactions on Power Delivery},
number = 1,
volume = 11,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 1996},
month = {Mon Jan 01 00:00:00 EST 1996}
}
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  • This paper shows that the Unified Power Flow Controller (UPFC) is able to control both the transmitted real power and, independently, the reactive power flows at the sending-and the receiving-end of the transmission line. The unique capabilities of the UPFC in multiple line compensation are integrated into a generalized power flow controller that is able to maintain prescribed, and independently controllable, real power and reactive power flow in the line. The paper describes the basic concepts of the proposed generalized P and Q controller and compares it to the more conventional, but related power flow controller, such as the Thyristor-Controlledmore » Series Capacitor and Thyristor-Controlled Phase Angle Regulator. The paper also presents results of computer simulations showing the performance of the UPFC under different system conditions.« less
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  • The unified power flow controller (UPFC) is a tool in the implementation of Flexible AC Transmission Systems (FACTS). It provides for the equivalent of static VAr compensation and series injection using back-to-back force commutated converters. This paper proposes a control strategy to extend UPFC operation to allow for the isolation of harmonics due to nonlinear loads. Simulation results based on the Electromagnetic Transients Program (EMTP) are used to illustrate device performance in a power system environment. Experimental results based on a single phase laboratory implementation verify the proposed control algorithm.