scholarly journals Reduction of SSR oscillations in power system network with STATCOM and UPFC

2018 ◽  
Vol 7 (2.8) ◽  
pp. 603
Author(s):  
J Sreeranganayakulu ◽  
G V. Marutheswar ◽  
P Sujatha
Keyword(s):  
Power Flow ◽  
Power Transmission ◽  
Short Circuit ◽  
Unified Power Flow Controller ◽  
Transmission Network ◽  
Mass Model ◽  
Static Synchronous Compensator ◽  
Mechanical Oscillations ◽  
Short Circuit Fault ◽  
Power Flow Controller

SSR is a complex issue in electric power transmission network because of which the mechanical arrangement of a multi mass model encounters shaft harms. To keep away from this issue the mechanical oscillations which for the most part happen amid a balanced short circuit fault on the transmission network ought to be moderated by a few means. This paper delineates about the IEEE second benchmark framework which is demonstrated and simulated in MATLAB Simulink. The outcomes are compared when Static Synchronous Compensator (STATCOM) is incorporated and furthermore with those when Unified Power Flow Controller (UPFC) included for their viability in moderating the Subsynchronous Resonance motions. 

The unified power flow controller: a new approach to power transmission control

1995 ◽  
Vol 10 (2) ◽  
pp. 1085-1097 ◽  
Author(s):  
L. Gyugyi ◽  
C.D. Schauder ◽  
S.L. Williams ◽  
T.R. Rietman ◽  
D.R. Torgerson ◽  
...  
Keyword(s):  
Power Flow ◽  
Power Transmission ◽  
Unified Power Flow Controller ◽  
Transmission Control ◽  
New Approach ◽  
Flow Controller ◽  
Power Flow Controller

scholarly journals Transmission Capacity Improvement Using Unified Power Flow Controller with New Control Strategy

2021 ◽  
pp. 225-232
Author(s):  
Moe Moe Oo ◽  
◽  
Myint Thuzar
Keyword(s):  
Control System ◽  
Control Strategy ◽  
Power Flow ◽  
Transmission Capacity ◽  
System Response ◽  
Unified Power Flow Controller ◽  
Transmission Network ◽  
Flow Controller ◽  
Power Flow Controller

This paper presents Unified Power Flow Controller (UPFC) with a new control strategy to improve the transmission capacity in power system network. With the growing demand of electricity, it is not possible to erect new lines to face the situation. Therefore UPFC is optimally utilizes to enhance the existing transmission network. A detail explanation of the controllers for both shunt and series converters of UPFC and DC link capacitor rating are presented in this study. To justify the performance of the UPFC model, 230kV transmission system in Upper Myanmar National Grid is considered as case study. The proposed control system performance is checked by applying different faults across a transmission line to which UPFC is connected. This is necessary because of the chance for occurance of fault is larger for this case study network. And, loading condition is changed to study the control system response. The simulation results show the effectiveness and suitable performance of the control strategy at improving transmission capacity. Transmission network model and all simulations have been done using MATLAB/Simulink software.

scholarly journals THE IMPACT OF THE UNIFIED POWER FLOW CONTROLLER ON MAXIMIZATION OF LOADABILITY OF ELECTRIC POWER GRID

2021 ◽  
Vol 26 (4) ◽  
pp. 14-26
Author(s):  
SUNDAY ADETONA ◽  
RAIFU SALAWU ◽  
FRANK OKAFOR ◽  
JOSEPH ADEYEMI
Keyword(s):  
Power Flow ◽  
Stability Index ◽  
Unified Power Flow Controller ◽  
Transmission Network ◽  
Test Bed ◽  
Control Series ◽  
Bee Colony ◽  
Flow Controller ◽  
The Impact ◽  
Power Flow Controller

The building of additional transmission network to meet the demand of the ever-increasing load is expensive, and time consuming. An alternative to constructing new lines is the incorporation of the Flexible Alternating Current Transmission System (FACTS); in which a Unified Power Flow Controller (UPFC) is a member of the ménage, which can be modelled as a combination of Static Var Compensator and Thyristor Control Series Compensator. This study determines the optimal location of the UPFC by randomly adding loads to the existing transmission network until the Fast Voltage Stability Index of one of the lines is at a critical point. This is the vital line in which UPFC components are added. The sizing of the components of the UPFC is determined using Artificial Bee Colony algorithm. The IEEE 30-bus network is exploited as the test bed. The results obtained reveal that the optimal positioning and sizing of the UPFC for the purpose of maximizing loadability of the grid when load angles are assumed to be negligible are the same as when the load angles are considered. The loadability of the test bed when UPFC is not injected in the grid is 440.376 MW, whereas, it is 837.915 MW when the UPFC is optimally located and sized; and this represents 90.27 %. The sizes of the shunt and series components of the UPFC that assist in realizing this maximization are -0.2780 pu and 0.1000 pu respectively.

Stability Improvement in Power Systems Using Unified Power Flow Controller (UPFC)

2013 ◽  
Vol 768 ◽  
pp. 392-397 ◽  
Author(s):  
B. Gopinath ◽  
S. Suresh Kumar ◽  
Juvan Michael
Keyword(s):  
Power Flow ◽  
Reactive Power ◽  
Short Circuit ◽  
Electric Energy ◽  
System Response ◽  
Unified Power Flow Controller ◽  
Flow Controller ◽  
Ac Transmission ◽  
Power Flow Controller ◽  
Bus System

Flexible AC transmission system (FACTS) is a system composed of static equipments used for ac transmission of electric energy to improve the power transfer capability and to enhance controllability of interconnected network. Unified Power Flow Controller (UPFC) is the most widely used FACTS device for providing fast acting reactive power compensation on high voltage electricity transmission network. This paper deals with the designing of Adaptive Neuro Fuzzy Inference controller (ANFIC) and fuzzy based Particle Swarm Optimization (PSO) controller for the performance analysis of UPFC. The controller have been designed and tested for controlling the real and reactive power of UPFC. Fuzzy-PI controller is used to control the shunt part of UPFC. The system response under high short circuit level is tested on 5-bus system and 118-bus system. Computer simulation by MATLAB/SIMULINK has been used to verify proposed control strategies.

scholarly journals Power Congestion Control Considering UPFC to Enhance Voltage Stability of the System

2020 ◽  
Vol 9 (3) ◽  
pp. 2257-2263
Keyword(s):  
Power Flow ◽  
Circuit Breaker ◽  
Simulation Software ◽  
Unified Power Flow Controller ◽  
Transmission Network ◽  
Matlab Simulation ◽  
Three Phase ◽  
In Series ◽  
Power Flow Controller ◽  
Shunt Series

This paper proposes a new FACTS device, i.e., Unified Power Flow Controller (UPFC) to relieve power congestion on power grid network. A simple model of a three phase AC–network of 500/230kV, 5-bus network with two transformers and two power generation plants (1000MW, 500MW) is designed. UPFC is designed with IGBT converters connected in shunt- series and both interconnected with DC bus and connected to AC side with transformer and coupling reactors. A contingency case is considered such that two transformers are considered instead of three transformers. The power flow of an UPFC installed at Bus-3 in 5-bus system is analyzed to show how the congestion of power on the grid is relieved through it. A bypass circuit breaker is installed at Bus -3 in the circuit to show the natural power flow without UPFC and power flow after installation of UPFC. The topology of series converter build in UPFC can introduce maximum of 10% of line-ground voltage in series. The simulation network of the 5-bus transmission network with UPFC connected at Bus-3 is designed with MATLAB/SIMULATION Software to estimate the power flow with UPFC connected.

scholarly journals Enhanced power quality using unified power flow controller systems

2021 ◽  
Vol 2089 (1) ◽  
pp. 012035
Author(s):  
Divya Shende ◽  
Prashant Jagtap ◽  
Rutuja Hiware
Keyword(s):  
Power Quality ◽  
Power Flow ◽  
Power Transmission ◽  
Electrical Energy ◽  
Unified Power Flow Controller ◽  
Power Flow Control ◽  
Voltage Quality ◽  
Ac Transmission ◽  
Power Flow Controller

Abstract Electrical system frequently finds and issue due to unstable nature and power quality because of, in relation to great number of nonlinear charges. So, there is need to limit inside of these difficulties and produce fine voltage quality concerns. The Flexible Alternate Flow Transmission Systems (FACTS) are the framework made out of static gear works for the AC transmission of electrical energy. Unified_Power_Flow Controls (UPFC) are the excellent FACTS tools to attach series and shunt together and it could use for framing Power transmission sensitive and active power. Here in the paper, Unified Power Flow Control (UPFC) used to clear the voltage sink and Surge. Unified Control was developed and engineered using amplifiers and rectifiers. The real and reactive modifications in congruous control orientations at the receiver side. Use of Simulink of MATLAB checks quality of energy in the use of Unified Control.

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