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Electricity deregulation has caused rapid changes in electricity market structure. Vertically integrated utility which performed all the functions including generation, transmission, distribution and retail services are now disaggregated into separate companies devoted to each function. The main goal of this deregulation is to enhance competition and provide new choices and economic benefits to the...
Recently, the integration of distributed generation (DG) units to distribution networks has grown significantly. This integration provides an opportunity to control the power flow, resulting in the optimal power flow (OPF) at the distribution level. OPF can reduce system losses and decrease the DG generation costs. Additionally, it can improve the voltage profile. Applying OPF to distribution networks...
This paper investigated into a comparative study of modified swarm intelligence based algorithms for solving multi-objective optimal power flow incorporating wind power and load uncertainties to improve its efficiency and optimize power system generation. The proposed method has been tested under a number of modified IEEE test systems. The results show that solving the multi-objective optimal power...
Optimal power flow (OPF) and security-constrained OPF (SCOPF) studies are important tools for both planning and operation of power supply systems. Conventional gradient-based SCOPF methods are commonly used for that purpose, but when analysed system is overstressed with severe multiple contingencies, conventional SCOPF methods may fail to converge. In such cases, meta-heuristic SCOPF methods can be...
This manuscript presents a case study to determine the optimal location and size of photovoltaic systems in an electric distribution networks using particle swarm optimization (PSO) such that network voltage profile is improved and losses are minimized. The distribution network of Masirah Island, Oman, is considered as a case study system. The test system is modeled and simulated using MATLAB load...
A novel approach is anticipated in this paper for optimal feeder reconfiguration and placement of DG units in distribution system with an objective of reduction of real power losses while satisfying operating constraints. Selective Particle Swarm Optimization algorithm (SPSO), modified version of Binary Particle Swarm Optimization algorithm, is used to obtain reconfigured distribution network. A novel...
This paper proposes a modified Cultural-based Bee Optimization Algorithm to solve the stochastic optimal power flow (SOPF) problem incorporating a set of wind farms to improve its efficiency and optimize power system generation. The proposed method has been tested under a number of modified IEEE test systems. The results show that solving the SOPF with the proposed algorithm are more effective than...
The integration of shunts capacitor in the distribution system can have significant effects on the behavior of the system. An improper insertion of this equipment can cause negative impacts, the solution of these impacts requires an optimal location of shunt capacitors with adequate power injected. The main objective of this study is to determine the optimal placement and size so that the maximum...
An optimal battery storage sizing is determined for a high power photovoltaic (PV) grid tied system. The sizing of the battery storage is chosen based on an optimal power flow management system intended to minimize the system running cost. Thus, a lower level power flow optimization problem is formulated along with the required constraints. The operating cost in this problem is formulated as a combination...
It is well known that the power system stabilizer (PSS) which is designed at one operating point cannot guarantee the stabilizing effect of PSS over a wide range of operating conditions. To achieve the PSS with high stabilizing performance against various conditions, this paper focuses on the new parameters optimization of PSS by the probability method. The PSS structure is the practical 2nd-order...
The European transmission system operators of today have to struggle with a general increase in power flows, leading to more and more to line congestions in certain transmission corridors. One reasonable countermeasure for this is active power flow control using phase shifting transformers (PST). To avoid negative interdependencies between these PSTs in different European control areas, the need for...
In this modern era, Economic Load Dispatch (ELD) is one of the essential issues of apprehension in power system process and scheduling. The cost function for each unit in ELD problems is resolved by using mathematical or analytical methods in conservative computation. So, the certain ELD problem is signified as a non linear optimization problem having both equality and inequality constraint that cannot...
Sustainable development of electricity source is currently the aim of electrical engineering and is complex because of both technological issues and the operational challenges. Regulated supply can be extended only with bulk storage facilities. A method of solution is proposed to deal with optimal power flow in a power system where the extensive use of wind and solar PV system is envisaged. Multi-criteria...
This work presents an application of a swarm optimization method to solve the optimal power flow problem taking into account the constraints of frequency and line ampacity in three-phase islanded Microgrids. Each generation unit is equipped with a Power Electronics Interface. In the considered formulation, the droop control parameters are considered as variables to be adjusted by a higher control...
The allure of integrating wind power, as a clean renewable energy source, into distribution grids is usually blurred with its undesirable impacts. These include reverse power flow, voltage rise, and disruption of the normal operation of voltage/VAr (VVAr) control devices. This paper describes a voltage control scheme that coordinates the VVAr control devices along with energy storage to mitigate integration...
This paper presents a hybrid optimization methodology based on directing the foraging of E-Coli bacteria to address the problem of voltage collapse (VC) in electric power systems (EPS). The proposed methodology, named Directed Bacterial Foraging Optimization (DBFO) is described, the results are presented and conclusions are drawn.
The prospective spread of Electric vehicles (EV) and plug-in hybrid electric vehicles arises the need for fast charging rates. High required charging rates lead to high power demands, which may not be supported by the grid. In this paper, an optimal power flow technique of a PV-battery powered fast EV charging station is presented to minimize the operation cost. The objective is to help the penetration...
The application of power electronic converters in the form of loop power flow controllers to distribution radial feeders in order to improve the efficiency of the grid and provide an adequate voltage support is currently an issue of major interest. This paper proposes an Energy Management System to deliver optimum commands to these devices, suited to be implemented in private networks owned by industrial...
This paper proposes an approach for optimal restoration of radial power distribution networks after an incident. This complex problem requires a decision-making process whose combinatorial nature can avoid the assessment of all possible solutions. Thus, the proposed approach is based on a binary coding particle swarm optimization (PSO) tool for handling the discrete variables associated with the switching...
This research utilizes particle swarm optimization (PSO) to minimize the total active power losses in an IEEE 6-bus transmission system. The complexity of the problem lies in integrating Newton-Raphson load flow algorithm, which is used in computing power losses, with PSO algorithm, which is used to minimize these losses. The considered PSO control variables are: the reactive power output of generators,...
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