scholarly journals Design of fractional evolutionary processing for reactive power planning with FACTS devices

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Yasir Muhammad ◽  
Rizwan Akhtar ◽  
Rahimdad Khan ◽  
Farman Ullah ◽  
Muhammad Asif Zahoor Raja ◽  
...  
Keyword(s):  
Power Flow ◽  
Reactive Power ◽  
Flow Analysis ◽  
Voltage Profile ◽  
Network Efficiency ◽  
Power Sources ◽  
Optimal Dispatch ◽  
Facts Devices ◽  
Flexible Alternating Current Transmission ◽  
Reactive Power Planning

AbstractReactive power dispatch is a vital problem in the operation, planning and control of power system for obtaining a fixed economic load expedition. An optimal dispatch reduces the grid congestion through the minimization of the active power loss. This strategy involves adjusting the transformer tap settings, generator voltages and reactive power sources, such as flexible alternating current transmission systems (FACTS). The optimal dispatch improves the system security, voltage profile, power transfer capability and overall network efficiency. In the present work, a fractional evolutionary approach achieves the desired objectives of reactive power planning by incorporating FACTS devices. Two compensation arrangements are possible: the shunt type compensation, through Static Var compensator (SVC) and the series compensation through the Thyristor controlled series compensator (TCSC). The fractional order Darwinian Particle Swarm Optimization (FO-DPSO) is implemented on the standard IEEE 30, IEEE 57 and IEEE 118 bus test systems. The power flow analysis is used for determining the location of TCSC, while the voltage collapse proximity indication (VCPI) method identifies the location of the SVC. The superiority of the FO-DPSO is demonstrated by comparing the results with those obtained by other techniques in terms of measure of central tendency, variation indices and time complexity.

scholarly journals Moth Flame Optimization based Reactive Power Planning

2020 ◽  
Vol 9 (3) ◽  
pp. 1528-1533
Keyword(s):  
Reactive Power ◽  
Search Algorithm ◽  
Gravitational Search Algorithm ◽  
Power Sources ◽  
Facts Devices ◽  
Current Transmission ◽  
Facts Controllers ◽  
Optimal Coordination ◽  
Flexible Alternating Current Transmission ◽  
Reactive Power Planning

Reactive power planning is one of the challenges facing an integrated power network to operate efficiently. It requires optimal coordination of all the reactive power sources in the network. In this work, Moth flame optimization (MFO) based algorithm used for optimal location of flexible alternating current transmission system (FACTS) devices. In standard IEEE 30 and IEEE 57 test systems the proposed approach is examined. The static Var compensator (SVC) and thyristor controlled series capacitor (TCSC) are the two FACTS devices used. The load ability of the power system is enhanced by installing FACTS controllers considering both active and reactive loading. The reactive sources are placed optimally which is chosen by considering position and size of FACTS devices. The proposed method with FACTS devices is compared with other recent techniques like Particle swarm optimization (PSO) and gravitational search algorithm (GSA). It is observed that the MFO based approach is better as compared to other methods in terms of loss and the running cost at various loading conditions.

Optimal TCSC placement for optimal power flow

2012 ◽  
Vol 63 (5) ◽  
pp. 316-321 ◽  
Author(s):  
Fatiha Lakdja ◽  
Fatima Zohra Gherbi ◽  
Redouane Berber ◽  
Houari Boudjella
Keyword(s):  
Mathematical Modeling ◽  
Mathematical Models ◽  
Power Flow ◽  
Optimal Power Flow ◽  
Flow Analysis ◽  
Test System ◽  
Facts Devices ◽  
Optimal Power ◽  
Current Transmission ◽  
Flexible Alternating Current Transmission

Very few publications have been focused on the mathematical modeling of Flexible Alternating Current Transmission Systems (FACTS) -devices in optimal power flow analysis. A Thyristor Controlled Series Capacitors (TCSC) model has been proposed, and the model has been implemented in a successive QP. The mathematical models for TCSC have been established, and the Optimal Power Flow (OPF) problem with these FACTS-devices is solved by Newtons method. This article employs the Newton- based OPF-TCSC solver of MATLAB Simulator, thus it is essential to understand the development of OPF and the suitability of Newton-based algorithms for solving OPF-TCSC problem. The proposed concept was tested and validated with TCSC in twenty six-bus test system. Result shows that, when TCSC is used to relieve congestion in the system and the investment on TCSC can be recovered, with a new and original idea of integration.

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.

scholarly journals Optimal placement of facts devices to reduce power system losses using evolutionary algorithm

2021 ◽  
Vol 21 (3) ◽  
pp. 1271
Author(s):  
Mahmood Khalid Zarkani ◽  
Ahmed Sahib Tukkee ◽  
Mohammed Jasim Alali
Keyword(s):  
Power System ◽  
Evolutionary Algorithm ◽  
Power Flow ◽  
Reactive Power ◽  
Research Work ◽  
Test System ◽  
Optimal Placement ◽  
Unified Power Flow Controller ◽  
Voltage Profile ◽  
Facts Devices

<p>The rapid and enormous growths of the power electronics industries have made the flexible AC transmission system (FACTS) devices efficient and viable for utility application to increase power system operation controllability as well as flexibility. This research work presents the application of an evolutionary algorithm namely differential evolution (DE) approach to optimize the location and size of three main types of FACTS devices in order to minimize the power system losses as well as improving the network voltage profile. The utilized system has been reactively loaded beginning from the base to 150% and the system performance is analyzed with and without FACTS devices in order to confirm its importance within the power system. Thyristor controlled series capacitor (TCSC), unified power flow controller (UPFC) and static var compensator (SVC) are used in this research work to monitor the active and reactive power of the carried out system. The adopted algorithm has been examined on IEEE 30-bus test system. The obtained research findings are given with appropriate discussion and considered as quite encouraging that will be valuable in electrical grid restructuring.</p>

Shunt-Series FACTS Devices on Network Constrained Unit Commitment

2016 ◽  
Vol 5 (1) ◽  
pp. 40
Author(s):  
G.A. M. Hosaini Hajivar ◽  
S.S. Mortazavi
Keyword(s):  
Power Systems ◽  
Power Flow ◽  
Reactive Power ◽  
Unit Commitment ◽  
Normal Operation ◽  
Voltage Profile ◽  
Facts Devices ◽  
Reactive Power Flow ◽  
Generation Cost ◽  
Shunt Series

<p>Shunt-Series FACTS Devices (SSFD) would play an important role in maintaining security and reduce Total Generation Cost (TGC) in the economical operation of power systems. The application of this devices to the AC model of Network-Constrained Unit Commitment (NCUC) for the day ahead scheduling is presented in this paper. The proposed AC model of NCUC with SSFD would include active and reactive power flow constraints which increase the network controllability at normal operation. A general SSFD model is introduced for the reactive power management in NCUC which is based on the reactive power injection model (RPIM). The case studies reveal that power transfer capability and voltage profile of the power system is improved by compensating SSFD. Meanwhile simulation results demonstrate the combined use of these devices to NCUC have a significant impact on maintaining network security,  lower TGC and increase using the maximum capacity of the existing transmission network.</p><p> </p>

scholarly journals Transient stability enhancement of statcom integration in power grid

2019 ◽  
Vol 16 (2) ◽  
pp. 553
Author(s):  
I. A Ethmane ◽  
A.K. Mahmoud ◽  
M. Maaroufi ◽  
A. Yahfdhou
Keyword(s):  
Power Quality ◽  
Power Flow ◽  
Distribution Systems ◽  
Transient Stability ◽  
Reactive Power ◽  
Voltage Drop ◽  
Flow Analysis ◽  
Drop Out ◽  
Power Flow Analysis ◽  
Facts Devices

T<span>o solve load growth of a hybrid existing electrical system, we at first build generation stations (wind, solar or thermical). And secondly in 2025 year, when the system is so meshed, some buses will be very far from production energy, the transits power will be lower than the transmission capacity, and the voltage drop out margin limit of stability. Therefore it is proposed to install Flexible AC Transmission System (FACTS) devices to enhance the transient power stability and quality in the power system. The power flow analysis of Newton Raphson method is performed on a seven (7) bus system with and without static synchronous compensator (STATCOM). The STATCOM is a shunt connected FACTS devices that are useful for reactive power compensation and mitigation of power quality problems in transmission and distribution systems. These investigations indicate the need of power flow analysis and determine best locations of STATCOM on the proposed system. The results of simulation have been programmed in MATLAB and PSS/E Simulator. In the end the expected disturbances and the power quality enhancement of the network in the horizon 2025 were attenuated by integration of STATCOM that is able to supply or absorb reactive power and to maintain the voltage at 1pu.</span>

scholarly journals Power Losses and Bus Voltage in Transmission Lines of a 28 Bus System

2020 ◽  
Vol 8 (5) ◽  
pp. 5675-5684
Keyword(s):  
Power System ◽  
Transmission Lines ◽  
Power Flow ◽  
Reactive Power ◽  
Flow Analysis ◽  
Power Losses ◽  
Integrated Network ◽  
Line Outages ◽  
Flexible Alternating Current Transmission ◽  
Bus Voltage

Inadequate supply of power is increasing day by day and causing a lot of problems and affecting various sectors of the country. This work involves the power analysis on the 28-bus network of the Nigeria 330kV integrated power system. The network consists of twenty-eight (28) buses, nine (9) generation stations, and fifty-two (52) transmission lines. Newton-Raphson (N-R) method of power flow analysis was carried out on the network using the relevant data. This analysis was carried out using PSS®E to determine bus voltages, real and reactive power losses of the integrated network. The work also involves carrying out line outages on various parts of the network to determine the effects on power losses and bus voltages. The results show that the following buses were not in line with the statutory limit of 0.95≤Vi≤1.05: bus 13 (New-Heaven), bus 14 (Onitsha), bus 16 (Gombe), bus 19 (Jos), bus 22 (Kano). Bus 16 was observed to not satisfy the limit during the analysis going as low as 0.7602p.u. in one of the line outages (Makurdi-Mambila off). The total losses was also determined and the highest power loss was observed when Makurdi-Mambila line was taken out of service (142.54MW, 1072.16MVAR) and the lowest loss was observed when the double transmission line between Benin-Sapele were both taken out of service(105.0MW, 830.50MVAR). This result concludes that the Nigeria network still needs to undergo changes to ensure sustainable and reliable power system. Compensation is recommended on the above stated weak buses using Flexible Alternating Current Transmission System (FACTS).

scholarly journals Enhancement of power flow using FACTS systems

2017 ◽  
Vol 7 (1) ◽  
pp. 38-47
Author(s):  
Sekhane Hocine ◽  
Labed Djamel
Keyword(s):  
Power Flow ◽  
Voltage Profile ◽  
Transmission Losses ◽  
Computing Environment ◽  
Software Environment ◽  
Static Synchronous Compensator ◽  
Total Transmission ◽  
Facts Devices ◽  
Current Transmission ◽  
Flexible Alternating Current Transmission

In this paper, both standard IEEE test systems 57-bus and Algerian 59-bus are considered. To enhance the power flow of these two considerable networks in terms of voltage profile and reduce the real and reactive total transmission losses, the inclusion of flexible alternating current transmission systems (FACTS) devices is one of the best solutions. For this, a static synchronous compensator (STATCOM) is proposed. Our code is written in the MATLAB computing environment, based on finding the weakest buses in the network, and placing one or two STATCOMs in an appropriate place; in the next step, there would be recalculation of the power flow again. The results of power flow compared with the popular MATPOWER software environment show the exactitude of our code calculation, and the enhancement of voltage profile, especially in buses where STATCOM is placed. Furthermore, the reduction of real and reactive losses shows the effectiveness of the FACTS device proposed. Keywords: FACTS, STATCOM, MATLAB, MATPOWER.

scholarly journals IMPACT OF STATIC VAR COMPENSATORS ON POWER SYSTEM: A CASE STUDY

2014 ◽  
pp. 4-8
Author(s):  
GUNEET KOUR ◽  
G.S. BRAR ◽  
JASWANTI JASWANTI
Keyword(s):  
Power System ◽  
Power Electronics ◽  
Power Flow ◽  
Reactive Power ◽  
Flow Analysis ◽  
Load Flow ◽  
Voltage Profile ◽  
Flexible Control ◽  
Load Flow Analysis ◽  
Reactive Power Flow

With increase in load, any transmission, distribution and generating model suffers from disturbances. These disturbances effect the overall stability of the system. Criterias like voltage profile, power flows, losses tell us about the state of the system under study. Load flow analysis of the system under study is capable of providing the insight of the system. The Emergence of FACTS device is really a step forward for the flexible control or Power System Operations. FACTS is the name given to the application of the power electronics devices to control power flows and other quantities in the power system. But when it comes to implementation stage, optimizing the location becomes a great concern because of the high cost involved with FACTS devices especially converter like SVC, STATCOM etc. Static Var Compensator (SVC) is a power quality device, which employs power electronics to control the reactive power flow of the system where it is connected. It is able to provide fast-acting reactive power compensation on electrical systems. SVC is one of the methods and can be applied to obtain a system with least losses, increased power flow and healthy voltage profile. Number, location and size of SVC are the main concerns and they can be optimized to a great extent by Genetic Algorithm (GA) or any other method. Use of SVC in a system has shown considerable increase in voltage profile and power flows while decrease in losses.

scholarly journals Voltage regulation and power loss reduction by integration of SVC in distribution networks via PSSE

2020 ◽  
Vol 11 (3) ◽  
pp. 1579
Author(s):  
Ba-swaimi Saleh ◽  
Lee Jun Yin ◽  
Renuga Verayiah
Keyword(s):  
Power Flow ◽  
Voltage Stability ◽  
Flow Analysis ◽  
Distribution Networks ◽  
Voltage Regulation ◽  
Base Case ◽  
Facts Devices ◽  
Load Demand ◽  
Power Loss Reduction ◽  
The Stability

Voltage stability is necessary in order to maintain the health of the grid system. In recent years, the load demand is increasing from time-to-time which compromised the stability of the system. On that purpose, several methods on enhancing the voltage stability of the system was introduced such as the transformer tap and FACTS devices. In a general overview, this study is to propose a several power compensation techniques on the base case of an IEEE-33 bus whereby power flow analysis using Netwon- Raphson in PSS/E software is performed. Afterwards, distributed generation (DG) and Static VAR Compensator (SVC) will be implemented within the distribution network to compensate the voltage instability losses based on the weakest index from the bus system. From both the cases which is proposed earlier, a comparison study is conducted on the performance on both DG and SVC within the proposed network.

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