scholarly journals An optimal allocation of UPFC and transient stability improvement of an electrical power system: IEEE-30 buses

2021 ◽  
Vol 11 (6) ◽  
pp. 4698
Author(s):  
Ali Abdul Razzaq Altahir ◽  
Marwa M. Marei
Keyword(s):  
Power Flow ◽  
Transient Stability ◽  
Optimal Allocation ◽  
Load Flow ◽  
Unified Power Flow Controller ◽  
Electrical Networks ◽  
Electrical System ◽  
Electrical Power System ◽  
Study Results

<span lang="EN-US">Recently, the expansion process of electrical networks has become crucial with the development of electrical systems. One of the active solutions to progress the performance of an electrical system is the usage of flexible AC transmission system (FACTS). As a new generation of telecommunications and power electronics technology, FACTS has provided a new viewpoint to increase the bearing capacity, better control the grid, and reduce costs. The unified power flow controller had a multi-purpose unit that could command the scenario of providing or consuming the power components and maintaining the bus voltage. The study's novelty resided in presenting a modified particle swarm optimization algorithm-based software system and applied a Newton-Raphson load flow solution to get the best solutions for optimal allocation of unified power flow controllers (UPFC). This study has focused on the functions of the UPFC electrical system with corresponding effects on transient stability. MATLAB software (Simulink/code) and excel sheet were performed on IEEE 30 buses as a case study. It has been shown the effectiveness of UPFC with fast response and autonomous command on the flow of power components. The dynamic response for stability improvement for some network buses had been verified to ensure the robustness of UPFC during a sudden disturbance in electrical load. The case study results illustrate that the number of UPFC increased with load increased by (14% and 21%).</span>

Enhancement of Available Transfer Capability Using FACTS Controller

2014 ◽  
Vol 573 ◽  
pp. 340-345
Author(s):  
V. Bhavithira ◽  
A. Amudha
Keyword(s):  
Power Flow ◽  
Transient Stability ◽  
Transmission System ◽  
Load Flow ◽  
Unified Power Flow Controller ◽  
Distribution Factor ◽  
Available Transfer Capability ◽  
Flexible Ac Transmission System ◽  
Transfer Capability ◽  
Ac Transmission

Abstract. This paper discusses about the available transfer capability by using Unified Power Flow Controller-UPFC. Flexible AC Transmission System-FACTS devices helps to reduce power flow on overloaded lines, thereby increasing the loadability of the power system, transient stability, damp out oscillations and also provide security and efficient transmission system. UPFC is one of the most versatile FACTS controllers. It is used for both shunt and series compensation. Newton Raphson method is used to calculate load flow for IEEE 30 bus system. By optimally placing the FACTS device Available Transfer Capability-ATC is improved. The ATC is calculated by using AC Power Transfer Distribution Factor- ACPTDF and this method is based on the sensitivity approach. Imperialistic Competitive Algorithm (ICA) is used to find optimal location of placing UPFC to improve ATC.

Transient Stability Improvement Using UPFC-SMES in A Multi Machine Power System

2016 ◽  
Vol 5 (1) ◽  
pp. 14
Author(s):  
Kantilal Dayalal Joshi ◽  
Vinod Chandrakar
Keyword(s):  
Energy Storage ◽  
Power Flow ◽  
Transient Stability ◽  
Magnetic Energy ◽  
Unified Power Flow Controller ◽  
Superconducting Magnetic Energy Storage ◽  
Clearing Time ◽  
Storage Technologies ◽  
Voltage Sourced Converter ◽  
Magnetic Energy Storage

Unified Power Flow Controller (UPFC) is a Voltage sourced converter based Flexible A.C.Transmission  (FACTS) controller which has a capability of simultaneously or selectively controlling all the parameters affecting transmission of power.  With emphasis on harnessing renewable energy many energy storage technologies are being used. Superconducting magnetic energy storage (SMES) stores energy in magnetic form by means of a D.C. current circulating in a superconducting coil. To exchange power with SMES a power electronic interface is required. Feasibility of interfacing SMES to D.C. link of UPFC has been explored in this paper. A multimachine system with a long transmission line is compensated by UPFC-SMES .A DC-DC chopper modulates power of SMES so as to improve the transient stability of system. Complete simulation has been done using MATLAB/Simulink which shows improvement of first peak, damping of oscillations &amp; improvement in critical clearing time.

Optimal Allocation of FACTS Devices by Using Multi-Objective Optimal Power Flow and Genetic Algorithms

2006 ◽  
Vol 7 (2) ◽  
Author(s):  
Lucio Ippolito ◽  
Antonio La Cortiglia ◽  
Michele Petrocelli
Keyword(s):  
Power Systems ◽  
Power System ◽  
Power Flow ◽  
Optimal Power Flow ◽  
Optimal Allocation ◽  
Cost Effective ◽  
Optimal Number ◽  
Unified Power Flow Controller ◽  
Open Market ◽  
Ac Transmission

The increases in power flows and environmental constraints are forcing electricity utilities to install new equipment to enhance network operation. Some application of Flexible AC Transmission System (FACTS) technologies to existing high-voltage power systems has proved the use of FACTS technology may be a cost-effective option for power delivery system enhancements. Amongst various power electronic devices, the unified power flow controller (UPFC) device has captured the interest of researchers for its capability of regulating the power flow and minimizing the power losses simultaneously. Since for a cost-effective application of FACTS technology a proper selection of the number and placement of these devices is required, the scope of this paper is to propose a methodology, based on a genetic algorithm, able to identify the optimal number and location of UPFC devices in an assigned power system network for maximizing system capabilities, social welfare and to satisfy contractual requirements in an open market power.In order to validate the usefulness of the approach suggested herein, a case study using a IEEE 30-bus power system is presented and discussed.

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