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This paper introduces a new optimization method to determine the optimal allocation of Unified Power Quality Conditioner (UPQC) in the distribution systems. UPQC is a versatile Custom Power Device (CPD) to solve problems related to voltage and current by the series and shunt compensator in the distribution systems. The task of UPQC highlighted in t...
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The Series and Shunt units don't have a typical dc link. So their control systems not exactly as same as the traditional UPQC control strategies.This device can improve power quality and composes power electronic series which was in MV/LV Substation, alongside a few electronic-shunt units associated near the end users.Additionally, the increment in...
Citations
... To solve difficulties with reactive power compensation, a modern algorithm based on swarms of natural creatures must be used. It has been mentioned in [16] to use the Moth Flame Optimisation (MFO) technique for UPQC placement. Utilizing MFO, the optimal position and complicated voltage supplied by the UPQC's series compensator is determined. ...
... Также при выходе из строя общего звена постоянного тока для обоих преобразователей универсальный регулятор прекращает свою работу, в то время как при разделении накопительных элементов в случае отказа в одном из них оставшийся преобразователь останется в работе, и регулятор будет функционировать частично. Таким образом, оснащение каждого активного преобразователя своим звеном постоянного тока является предпочтительным с точки зрения эффективности повышения качества электрической энергии и сохранения части функций универсального регулятора в комбинированных системах электроснабжения переменной структуры [42,43]. ...
The urgent nature of the power quality improvement in the nonlinearly loaded industrial power lines in order to ensure production efficiency is substantiated. The necessity of
multi-functional compensation and filtering devices with active converters in hybrid power
lines is demonstrated. The CFD feature variation of power qualities in case of change in parameters of a power line or connected load. The main configurations of the general-purpose power
quality controls which also are the multi-functional compensation and filtering devices with
a few active converters are determined. The prospects for the general-purpose power quality
controls with distributed configuration in hybrid power lines from the viewpoint of the control
efficiency are shown. The need for the analysis of the cross-feed of active converters in a general-purpose distributed-structure control in the power quality improvement in different cases
of anharmonicity is substantiated. The mathematical and simulation models are constructed
for the general-purpose power quality control with the distributed structure in the nonlinearly
and linearly loaded power lines. The integrated analysis of the modeling results is carried out
to assess the efficiency of the power quality improvement by the general-purpose control by
the preset quality determinants at different sequences of the active converters under conditions
of anharmonicities of the source and load. The influence of the general-purpose power quality control with the distributed structure on the components the power factor under complex
anharmonicity is estimated.
... The authors in ref. [46] presented an MFO approach to obtain the appropriate placement and sizing of a UPQC to give a solution for providing reactive power compensation in electrical networks. Thus, the load flow program now includes both the voltage that is injected by the series compensator and the reactive power that is injected by the shunt compensator. ...
The use of FACTS devices in power systems has become increasingly popular in recent years, as they offer a number of benefits, including improved voltage profile, reduced power losses, and increased system reliability and safety. However, determining the optimal type, location, and size of FACTS devices can be a challenging optimization problem, as it involves mixed integer, nonlinear, and nonconvex constraints. To address this issue, researchers have applied various optimization techniques to determine the optimal configuration of FACTS devices in power systems. The paper provides an in-depth and comprehensive review of the various optimization techniques that have been used in published works in this field. The review classifies the optimization techniques into four main groups: classical optimization techniques, metaheuristic methods, analytic methods, and mixed or hybrid methods. Classical optimization techniques are conventional optimization approaches that are widely used in optimization problems. Metaheuristic methods are stochastic search algorithms that can be effective for nonconvex constraints. Analytic methods involve sensitivity analysis and gradient-based optimization techniques. Mixed or hybrid methods combine different optimization techniques to improve the solution quality. The paper also provides a performance comparison of these different optimization techniques, which can be useful in selecting an appropriate method for a specific problem. Finally, the paper offers some advice for future research in this field, such as developing new optimization techniques that can handle the complexity of the optimization problem and incorporating uncertainties into the optimization model. Overall, the paper provides a valuable resource for researchers and practitioners in the field of power systems optimization, as it summarizes the various optimization techniques that have been used to solve the FACTS optimization problem and provides insights into their performance and applicability.
... • MFO algorithm. The authors in [46] have presented a MFO approach to obtain the appropriate placement and sizing of UPQC to giving a solution for providing reactive power compensation in electrical network. Thus, the load flow program now includes both the voltage that is injected by the series compensator and the reactive power that is injected by the shunt compensator. ...
Using flexible AC transmission system (FACTS) devices in power systems while adhering to some equality and inequality constraints, researchers around the world sought to address this issue with the objectives of improving the voltage profile, reducing power losses in transmission lines, and increasing system reliability and safety. The recent development of FACTS controllers opens up new perspectives for safer and more efficient operation of electrical power networks by continuous and rapid action on power systems parameters, such as phase angle shifting, voltage injection and line impedance compensation. Thus, an improvement on voltage profile and enhancement of power transfer capability can be obtained. It is for that, the idea behind the FACTS concept is to enable the transmission system to be an active element in increasing the flexibility of power transfer requirements and in securing stability of integrated power system. It may also be effective in transient stability improvement, power oscillations damping and balancing power flow in parallel lines. The primary issue that has significantly piqued the interest of a number of researchers working in this field is the FACTS optimization problem, which involves determining the optimal type, location, and size of FACTS devices in electrical power systems. For solving this mixed integer, nonlinear and non-convex optimization problem, this paper provides an in-depth and comprehensive review of the various optimization techniques covered in published works in the field. In this review, a classification of optimization techniques in five main groups that are widely used, such as classical optimization techniques or conventional optimization approaches, Meta heuristic methods, analytic methods or sensitive index methods and mixed or hybrid methods, is summarized. In addition, a performance descriptions and comparison of these different optimization techniques are discussed in this study. Finally, some advice is offered for future research in this field.
... This technique was tested on IEEE 14,24,30,39,57, and 118 bus test systems and was also simulated for five different use cases. i) OPP without considering zero injections, ii) OPP considering zero injections, iii) OPP without considering zero injections and one PMU loss, iv) OPP considering zero injections and one PMU loss, and v) OPP considering zero injections and one PMU loss and a line outage. ...
The phasor measurement unit (PMU) is an essential measuring device in current power systems. The advantage seems to be that the measuring system could simultaneously give voltages and currents phasor readings from widely dispersed locations in the electric power grid for state estimation and fault detection. Simulations and field experiences recommend that PMUs can reform the manner power systems are monitored and controlled. However, it is felt that expenses will limit the number of PMUs that will be put into any power system. Here, PMU placement is done using a binary spider monkey optimization (BSMO) technique that uses BSMO by simulating spider monkeys’ foraging behavior. Spider monkeys have been classified as animals with a fission-fusion social structure. Animals that follow fission-fusion social systems divide into big and tiny groups, and vice versa, in response to food shortage or availability. The method under development produced the optimum placement of PMUs while keeping the network fully observable under various contingencies. In the study published in IEEE14, IEEE24, IEEE30, IEEE39, IEEE57, and IEEE118, the proposed technique was found to reduce the number of PMUs needed.
... The UPQC are power electronic devices that act like controlled voltage and current sources in power systems so that it can remove or reduce the effect of power quality issues like harmonics, sags, swells, imbalances in power source or loads and also lead to improve the power factor [1,2]. The growing interest in UPQCs come from last century, and since the concept of "power quality" has been gaining increasing popularity in the field of electrical engineering, today, it has become a great topic for companies providing electricity service, equipment manufacturers and end users, that leading to solutions searching to solve the problems of power quality [3][4][5][6][7][8]. ...
span>In this paper we present a new algorithm to generate the reference signals to control the series and parallel power inverters in an unified power quality conditioner “UPQC” to enhance power quality. The algorithm is based in the instantaneous power tensor formulation which it is obtained by the dyadic product between the instantaneous vectors of voltage and current in n-phase systems. The perfect harmonic cancelation algorithm “PHC” to estimate the current reference in a shunt active power filter was modified to make it hardy to voltage sags through unit vector template generation “UVGT” while from the same algorithm it extracts the voltage reference for series active power filter. The model was validated by mean of simulations in Matlab-Simulink®.</span
... In [21] Apr 2019, Srider and Prakash proposed whale optimization algorithm for finding optimal location and sizing of the DG. Main objective function is minimization of power loss and cost with maximum voltage stability index, this method is tested for IEEE 69 bus system. ...
Power loss reduction, improvement of voltage profile, system reliability and system security are the important objectives that motivated researchers to use custom power devices/FACTS devices in power systems. The existing power quality problems such as power losses, voltage instability, voltage profile problem, load ability issues, energy losses, reliability problems etc. are caused due to continuous load growth and outage of components. The significant qualities of custom power devices /FACTS devices such as power loss reduction, improvement of voltage profile, system reliability and system security have motivated researchers in this area and to implement these devices in power system. The optimal placement and sizing of these devices are determined based on economical viability, required quality, reliability and availability. In published literatures, different algorithms are implemented for optimal placement of these devices based on different conditions. In this paper, the published literatures on this field are comprehensively reviewed and elaborate comparison of various algorithms is compared. The inference of this extensive comparative analysis is presented. In this research, Meta heuristic methods and sensitive index methods are used for determining the optimal location and sizing of custom power devices/FACTS devices. The combination of these two methods are also implemented and presented.
This comprehensive review explores the growing importance of sustainable energy solutions, with a particular focus on the integration of solar and wind technologies within hybrid renewable energy systems. As the demand for clean energy increases, hybrid systems offer a promising solution to address energy security and environmental concerns. However, these systems face significant challenges, including intermittency issues and the complexity of integration into existing power grids. This paper examines the role of hybrid systems in mitigating these challenges and improving grid stability. Additionally, it highlights the role of the unified power quality conditioner in managing power quality and facilitating the integration of renewable sources into distribution networks. Drawing from over 395 research papers, the review offers valuable insights into the current state of the field and presents key directions for future research and practical applications.
The efficiency and operation of current distribution systems have been enhanced by the insertion of renewable distributed generation (RDG). However, the placement of DG does not satisfy the network’s need for reactive power, which keeps the voltage of the buses at a level that maximizes the uncontrolled real and reactive variations of power systems. This paper proposed the optimal allocation of DG and Unified Power Quality Conditioner (UPQC) simultaneously to improve the performance of an active distribution system. The most advanced custom power device is the UPQC which combined with the capability of shunt and series compensator features allows for voltage and current compensation in distribution systems. A suitable optimization method is needed to address the challenge of selecting the capacity and position of these compensators. The Firefly Algorithm (FA) is a promising solution to the challenges of multi-objective optimization. The intended objective is active and reactive power loss reduction while improving the voltage profile without violating any system constraints. The effectiveness of the proposed optimal allocation of DG/UPQC using the FA method was evaluated by comparing it to the allocation of the DG system only and the base case system scenarios, respectively. The results revealed a significant percentage reduction in active and reactive power losses, reaching 72.01% and 66.57% with the optimal DG/UPQC allocation combination, respectively. In comparison to the Artificial Bee Colony Optimization (ABC) method, the results revealed the FA method is more efficient regarding both convergence speed and solution quality. The MATLAB 2021b environment served as the platform for the simulation, and it was tested it using the IEEE 33-bus radial distribution system method.
The distribution systems provide the key link between the power utility and the consumers. For the better operation and planning of the electrical distribution systems, it is essential to analyze the behavior of the network with different nature of loads, its growth and new upcoming D-FACTS devices. In the present work, the authors analyzed distribution system in the presence of UPQC as Distribution FACTS device. The main highlights of the paper are: (i) analysis of distribution system with UPQC, (ii) reduction in the losses of the network and improvement in the voltage profile, (iii) impact of load models and load growth on the performance of system, and (iv) savings in cost of energy loss. The analysis is carried out on IEEE-33 bus radial distribution network with time-varying load and UPQC.
