Optimal location of UPFC based on PSO algorithm considering active power loss minimization (original) (raw)
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Optimal placement of facts devices to reduce power system losses using evolutionary algorithm
Indonesian Journal of Electrical Engineering and Computer Science, 2021
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.
Optimal Placement of Facts Devices in Power System for Power Quality Improvement
2019
Power Quality is an important issue in power systems where compensating devices play a very important role to improve voltage profile reduce power losses and mitigate power quality problems. Implementation of the Flexible AC Transmission Systems (FACTS) devices to optimally in power flow of IEEE 30 & 57 bus systems to shrink power losses and improved voltage profile for power quality improvement. In this paper four types of FACTS controllers STATCOM, SVC, TCSC and UPFC are implemented by conventional method for power quality improvement. Here an assessment is also made between conventional method and evolutionary computation method to authenticate performance, results shows usefulness of the projected method.
Incorporation of different FACTS devices in Transmission system for minimization of losses
The World Academy of Research in Science and Engineering
This paper presents an AC Transmission system power flow controlled by injecting a compensating voltage in series with the line and injecting reactive power in shunt with the bus. Static Synchronous Series Compensator (SSSC) and Static Synchronous Compensator (STATCOM) are utilized as a series and shunt compensation, respectively while Unified Power Flow Controller (UPFC) is considered as a shunt-series compensator.The prediction of dynamic voltage collapse at the buses is found by calculating voltage collapse prediction index (VCPI) for placement of shunt FACTS devices and Fast voltage stability index (FVSI) for placement of series FACTS devices. This paper covers, in depth, the modeling and simulation methods required for a thorough study of the steady-state operation of electrical power systems with these flexible AC Transmission Systems (FACTS) controllers. A thorough grounding on the theory and practice of positive sequence power flow is offered here. MATLAB® codes are utilized for the implementation of the three devices in the Newton-Raphson algorithm. Power flow control ranges are evaluated for standard 14-bus system. Results are reported and studies are presented to illustrate and compare the effectiveness of the STATCOM, SSSC and UPFC.
International Journal of Electrical and Computer Engineering (IJECE), 2021
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 multipurpose 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%).
IIUM Engineering Journal
As the world's energy consumption increases, the expansion of the energy system becomes increasingly important. However, the creation of new transmission lines requires excessive costs and time if the same transmission capacity is to be added to the existing network. Today's electrical networks are faced with high risks of voltage instability and real power losses. This development tends to occur due to the lack of reactive control power (RPL) in heavily stressed operating conditions caused by increased demand for loads and the rapid development of power systems worldwide. This paper has adopted the setting of FACTS (flexible AC transmission system) devices as additional control parameters for reducing transmission losses in power system static types of two FACTS devices consisting of SVC (static VAR compensators) while the TCSC (thermistor controlled series compensator) is included in the issue formulation. During this paper, the proposed algorithm was to determine the opt...
Springer,cham, 2019
One of the significant problems in the power system network is the overloading of the transmission system which increases stress on transmission lines. This problem can be mitigated by the addition of isolated and individually controlled devices such as FACTS to the existing networks. Thus, the main objective of this paper is determining the optimal placement of SVC and TCSC FACTS device at bus and lines and minimizing the total power loss & enhances the transferred power by applying these SVC and TCSC FACTS devices. To this end, first, load flow analysis was done using the Newton Raphson technique. Then, the optimal location was found by the voltage stability index (L-indices) and fast voltages stability indices (FVSI). The critical bus has the lowest voltage and the critical line has the largest value of FVSI. Consequently, SVC and TCSC FACTS device is installed on both the critical bus and the critical line respectively. To validate the methodology, we use IEEE-30 bus standard test system network and the simulation is done on PSAT (power system analysis toolbox) in MATLAB. Finally, based on the finding of the simulation result, the best locations for SVC and TCSC FACTS devices for improving power transfer, voltage profile and loadability are the weakest bus and line of the system.
PERFORMANCE IMPROVEMENT OF TRANSMISSION SYSTEM USING UPFC BY GA AND PSO ALGORITHMS
Power losses and voltage instability are major problems in present power systems. It has become more complex day by day due to less security and reliability. Flexible AC transmission systems (FACTS) controllers have been mainly used for solving various power system steady state control problems. Flexible AC transmission systems or FACTS are devices which allow the flexible and dynamic control of power systems and enhancement of system stability using FACTS controllers. Based on PSO algorithm is an effective method for finding the optimal choice and location of FACTS controllers. It also increases load ability of the line and minimizes losses. This paper presents comparative study of GA and PSO algorithms for one of the FACTS controller i.e., UPFC device. The suggested algorithm has been applied to IEEE-30 bus system.
Enhancement of Power System Loadability with FACTS Devices
Journal of The Institution of Engineers (India): Series B, 2014
This paper discusses the use of genetic algorithm (GA) and particle swarm optimization (PSO) based approach for the allocation and coordinated operation of multiple flexible ac transmission system (FACTS) devices for the economic operation as well as to increase power transfer capacity of an interconnected power system under different loading condition. The GA and PSO based approach is applied on IEEE 30-bus system. The system is reactively loaded starting from base to 200 % of base load. FACTS devices are installed in the different locations of the power system and system performance is noticed with and without FACTS devices. First, the locations, where the FACTS devices to be placed is determined by calculating active and reactive power flows in the lines. GA and PSO based algorithm is then applied to find the amount of magnitudes of the FACTS devices. Finally comparison between these two techniques for the placement of FACTS devices is presented and superiority of GA approach is established.
International Research Journal of Modernization in Engineering Technology and Science, 2022
Over the years, the Nigerian power system is faced with lingering problems, such as severe power losses, as well as very high failure index that directly affect the quality and reliability of power distributed to the consumers. However, currently, the Nigerian power industry is undergoing restructuring, especially in the generation and distribution systems. In view of the deregulation of electricity distribution and marketing, the traditional practices of the Nigerian power system are undergoing changes so as to address the identified problems in the existing power system. This specifically involves better utilisation of the existing power system resources to improve on the system reliability and minimize cost. One method of improving on maximum power transfer and minimising cost as well as power losses in the existing power system is through optimal location of FACTS (Flexible Alternating Current Transmission Systems) devices. The problem of improving power loss in power transmission line is a task that must be solved in an optimal manner. Thus, this research seeks to carry out performance analysis on a Thyristor Controlled Series Compensator (TCSC) FACTS device for transmission line. In addition, optimal placement of the TCSC FACTS device is also proposed for control of inline flow and maintains bus voltages in desired level and reducing losses as required. (FACTS) devices have been proposed as an effective solution for controlling power flow and regulating bus voltage in electrical power systems, resulting in low system losses, and improved power stability. This paper presents an optimal location of FACTS devices along transmission line using Genetic algorithm (GA). Optimisations seek to ensure maximum power transfer, improve on system reliability and minimise cost. The proposed algorithm is tested on Shiroro-Minna 132 kV transmission line. GA was trained on the transmission line data and the TCSC FACTS device parameters. Thus with GA, the optimal FACTS location can be achieved according to series compensation. The obtained results showed the viability of the proposed approach for transmission lines in Nigeria.