Analysis of Active and Reactive Power and Voltage Control in the Power Structure with the Help of Unified Power Flow Controller

2018 ◽  
pp. 485-494
Author(s):  
Sahil Rotra ◽  
Inderpreet Kaur ◽  
Kamal Kant Sharma
Keyword(s):  
Power Flow ◽  
Reactive Power ◽  
Voltage Control ◽  
Power Structure ◽  
Unified Power Flow Controller ◽  
Active And Reactive Power ◽  
Flow Controller ◽  
Power Flow Controller

scholarly journals Real and Reactive Power Control by using 48-pulse Series Connected Three-level NPC Converter for UPFC

2011 ◽  
pp. 1-5
Author(s):  
A. Naveena ◽  
M.Venkateswara Rao
Keyword(s):  
Transmission Line ◽  
Power Flow ◽  
Reactive Power ◽  
System Stability ◽  
Unified Power Flow Controller ◽  
Control Mechanisms ◽  
Active And Reactive Power ◽  
Reactive Power Flow ◽  
Flow Controller ◽  
Power Flow Controller

The equipments based on the power electronics have been improved under the name of Flexible Alternating Current Transmission Systems (FACTS) in the last years. Unified Power Flow Controller (UPFC) is the most widely used FACTS device to control the power flow and to optimize the system stability in the transmission line. UPFC is a FACTS devices that can control active and reactive power flow in transmission line by means of injection controllable series voltage to the transmission line. This paper proposes a new connection for a Unified Power Flow Controller (UPFC) to control the active and reactive power flow control in two sides of a transmission line independently and it regulates bus voltage in the same transmission line, furthermore it is possible to balance line current too. This connection of the UPFC will be called an center node UPFC (C_UPFC). It is one of the newest devices within the FACTS technology. The structure and capability of the C_UPFC is discussed and its control scheme is based on the d-q orthogonal coordinates. According to this, the performance of UPFC for several modes of operations using different control mechanisms based on Proportional-Integral (PI) and PID based controllers has been studied. The obtained simulation results from Matlab/simulink confirm the effective features.

scholarly journals Optimal Placement of Unified Power Flow Controller by TOPSIS Method for Loss Minimization

2021 ◽  
Vol 10 (1) ◽  
pp. 126-131
Author(s):  
Million Alemayehu Bedasso* ◽  
R. Srinu Naik
Keyword(s):  
Power System ◽  
Power Flow ◽  
Reactive Power ◽  
Optimization Technique ◽  
Optimal Placement ◽  
Unified Power Flow Controller ◽  
Power Losses ◽  
Active And Reactive Power ◽  
Flow Controller ◽  
Power Flow Controller

In order to eliminate active and reactive power losses in the power system, this paper proposes TOPSIS and DE algorithm for determining the best location and parameter settings for the Unified Power Flow Controller (UPFC). To mitigate power losses, the best UPFC allocation can be achieved by re-dispatching load flows in power systems. The cost of incorporating UPFC into the power system. As a consequence, the proposed objective feature in this paper was created to address this problem. The IEEE 14-bus and IEEE 30-bus systems were used as case studies in the MATLAB simulations. When compared to particle swarm optimization, the results show that DE is a simple to use, reliable, and efficient optimization technique than (PSO). The network's active and reactive power losses can be significantly reduced by putting UPFC in the optimum position determined by TOPSIS ranking method.

scholarly journals Power quality improvement using fuzzy logic controller based unified power flow controller

2021 ◽  
Vol 21 (1) ◽  
pp. 1
Author(s):  
Ahmed Nasser Alsammak ◽  
Hasan Adnan Mohammed
Keyword(s):  
Fuzzy Logic ◽  
Power Quality ◽  
Power Flow ◽  
Fuzzy Logic Controller ◽  
Reactive Power ◽  
Unified Power Flow Controller ◽  
Active And Reactive Power ◽  
Reactive Power Flow ◽  
Flow Controller ◽  
Power Flow Controller

<p>The Power quality of the electrical system is an important issue for industrial, commercial, and housing uses. An increasing request for high quality electrical power and an increasing number of distorting loads had led to increase the consideration of power quality by customers and utilities. The development and use of flexible alternating current transmission system (FACTs) controllers in power transmission systems had led to many applications of these controllers. A unified power flow controller (UPFC) is one of the FACTs elements which is used to control both active and reactive power flow of the transmission line. This paper tried to improve power quality using a fuzzy logic controller (FLC) based UPFC, where it used to control both active and reactive power flow, decreas the total harmonic distortion (THD), correct power factor, regulate line voltage and enhance transient stability. A comparison study of the performance between the system with a conventional PID controller and FLC has been done. The theoretical analysis has been proved by implementing the system using MATLAB/SIMULINK package.The Power quality of the electrical system is an important issue for industrial, commercial, and housing uses. An increasing request for high quality electrical power and an increasing number of distorting loads had led to increase the consideration of power quality by customers and utilities. The development and use of flexible alternating current transmission system (FACTs) controllers in power transmission systems had led to many applications of these controllers. A unified power flow controller (UPFC) is one of the FACTs elements which is used to control both active and reactive power flow of the transmission line. This paper tried to improve power quality using a fuzzy logic controller (FLC) based UPFC, where it used to control both active and reactive power flow, decreas the total harmonic distortion (THD), correct power factor, regulate line voltage and enhance transient stability. A comparison study of the performance between the system with a conventional PID controller and FLC has been done. The theoretical analysis has been proved by implementing the system using MATLAB/SIMULINK package.</p>

Effect of unified power flow controller installation in dual feed induction generator (DFIG) wind turbines

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Asaad Shemshadi ◽  
Pourya Khorampour
Keyword(s):  
Power Flow ◽  
Wind Farm ◽  
Reactive Power ◽  
Wind Farms ◽  
Transient Behavior ◽  
Unified Power Flow Controller ◽  
Voltage Fluctuations ◽  
Flow Controller ◽  
Power Flow Controller ◽  
Sudden Load

Abstract In recent years, the use of wind energy to generate electricity in the world has been accelerating and growing. Wind farms are unstable when dynamic voltage fluctuations occur, especially sudden and sudden changes in load, and show oscillating performance at their output. In this paper, the Unified Power Flow Controller (UPFC) has been simulated and studied by Matlab software to improve the dynamic stability and transient behavior of the wind power plant in the event of sudden load changes. The simulation results show that by controlling the UPFC series inverter, voltage fluctuations in the PCC bus are prevented and the UPFC parallel inverter injects power after changing the load for faster recovery and stability of the PCC bus voltage and thus the stability of the wind farm. The UPFC can control the active and reactive power at the transmission line, and in fact, controls the output of the wind turbine with the generator from both sides to the fluctuations caused by sudden load changes that play a role such as sudden disturbances and oscillating errors. Also, the presence of UPFC in the system reduces power fluctuations.

scholarly journals Unified Power Flow Controller for Non-Linear Loads Using Adaptive Power Quality Theory

2019 ◽  
Vol 9 (2) ◽  
pp. 61-67
Author(s):  
Jaya Raju Gaddala ◽  
Sambasiva Rao Gudapati
Keyword(s):  
Power Quality ◽  
Power Flow ◽  
Reactive Power ◽  
Unified Power Flow Controller ◽  
Q Theory ◽  
Non Linear ◽  
Source Current ◽  
Flow Controller ◽  
Power Flow Controller ◽  
Load Conditions

Harmonics reduction techniques in source current were found to be unreliable and imbalanced with different load conditions. This certain unreliability problem in harmonics mitigation is caused by non-linear loads. The harmonics and power quality problems are eliminated by filters. These filters are expensive to provide a dynamic response under various load conditions. The new unified power flow controller composed of a series and shunt compensator provides more secured power systems and good voltage stability at various load conditions. D-Q theory is used to generate the reference current from the AC source current. D-Q theory produces sinusoidal harmonics that are opposite to load harmonics. This UPFC can absorb or inject reactive power in the PCC. D-Q theory followed by a hysteresis current controller generates PWM pulses to the shunt and series compensator. The PI and fuzzy logic controllers preserve the DC link voltage in the storage capacitor. The proposed technique has been simulated by using Matlab simulation under different load conditions.

scholarly journals Voltage and Reactive Power Control in DFIG Wind Farm Load bus by FACT Device – UPFC

2021 ◽  
Vol 23 (12) ◽  
pp. 207-211
Author(s):  
DR . Dipesh. M .Patel ◽  
◽  
Prof. (Dr.) Karunesh Saxena ◽  
Keyword(s):  
Power Control ◽  
Power Flow ◽  
Wind Farm ◽  
Reactive Power ◽  
Unified Power Flow Controller ◽  
Reactive Power Control ◽  
Flow Controller ◽  
Doubly Fed ◽  
Farm System ◽  
Power Flow Controller

This paper deals with the analysis and simulation of the Unified Power Flow Controller (UPFC) for Grid connected DFIG wind farm system mitigation. The purpose of the paper is to derive and analyze a reactive power control strategy of UPFC dedicated for DFIG mitigation. The FACT device Unified Power Flow Controller (UPFC) is connected with load bus. Paper has demonstrated the improvement in voltages, power transferred to grid, active and reactive power control. Matlab/simulink is used for the work. Paper demonstrated the simulation results for with and without UPFC for Grid connected Doubly Fed Induction Generator wind farm system.

scholarly journals Artificial-neural-network based unified power flow controller for mitigation of power oscillations

2021 ◽  
Vol 24 (3) ◽  
pp. 1323
Author(s):  
Vireshkumar Mathad ◽  
Gururaj Kulkarni
Keyword(s):  
Neural Network ◽  
Artificial Neural Network ◽  
Power Flow ◽  
Reactive Power ◽  
Pi Controller ◽  
Unified Power Flow Controller ◽  
Power Oscillations ◽  
Artificial Neural ◽  
Flow Controller ◽  
Power Flow Controller

The series and shunt control scheme of unified power flow controller (UPFC) impacts the performance and stability of the power system during power swing. UPFC is the most versatile and voltage source converter device as it can control the real and reactive power of the transmission system simultaneously or selectively. When any system is subjected to any disturbance or fault, there are many challenges in damping power oscillation using conventional methods. This paper presents the neural network-based controller that replaces the proportional-integral (PI) controller to minimize the power oscillations. The performance of the artificial neural network (ANN) controller is evaluated on IEEE 9 bus system and compared with a conventional PI controller.

scholarly journals Voltage Profile Improvement with Combined UPFC and IPFC Facts Devices: A Review

2020 ◽  
Vol 1 (1) ◽  
pp. 26-30
Author(s):  
Violet Kaswii ◽  
Michael Juma Saulo
Keyword(s):  
Power System ◽  
Power Flow ◽  
Reactive Power ◽  
Voltage Control ◽  
System Stability ◽  
Voltage Profile ◽  
Transmission Systems ◽  
Facts Devices ◽  
Flow Controller ◽  
Power Flow Controller

The interline power flow controller (IPFC) and the unified power flow controller (UPFC) are both advanced types of flexible AC transmission systems (FACTS). These devices can provide the power system with control of voltage, and that of real and reactive power. This paper reviews the literature on UPFC and IPFC FACTS devices in voltage control and covers two main areas of research (i) voltage control using FACTS devices, and (ii) UPFCs / IPFCs and their applications in power systems. FACTs devices are applied in modern power system networks for the purpose of voltage control while at the same time providing enhanced power system stability. Research has shown that their benefits in the long run outweighs their high cost especially when they are optimally sized and located in the power network. Moreover, in the planning of power transmission systems, a Multi-Criteria Decision Making (MCDM) technique can help in the incorporation of both the costs and technical viability. This approach provides techno-economic optimization and at the same time meeting environmental criteria.

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