Implementation of non-traditional optimization techniques (PSO, CPSO, HDE) for the optimal load flow solution
01 Nov 2008-pp 1-6
TL;DR: This paper presents an approach to obtain the optimal load flow solution using three different intelligent techniques such as particle Swarm optimization (PSO), crazy particle swarm optimization (CPSO) and hybrid differential evolution (HDE) subject to various system constraints.
Abstract: This paper presents an approach to obtain the optimal load flow solution using three different intelligent techniques such as particle swarm optimization (PSO), crazy particle swarm optimization (CPSO) and hybrid differential evolution (HDE) subject to various system constraints. The above optimization techniques have a capability to provide global optimal solution in problem domains where a complete traversion of the whole search space is completely infeasible. The proposed method has been tested on Ward and Hale six bus system and IEEE-14 bus test system. The solutions obtained are quite encouraging and useful in solving the optimal load flow problem. The algorithm and simulation are carried using Matlab software.
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TL;DR: Analysis of the load flow problem in power system planning studies shows that Newton-Raphson is the most reliable method because it has the least number of iteration and converges faster.
Abstract: Load flow is an important tool used by power engineers for planning, to determine the best operation for a power system and exchange of power between utility companies. In order to have an efficient operating power system, it is necessary to determine which method is suitable and efficient for the system’s load flow analysis. A power flow analysis method may take a long time and therefore prevent achieving an accurate result to a power flow solution because of continuous changes in power demand and generations. This paper presents analysis of the load flow problem in power system planning studies. The numerical methods: Gauss-Seidel, Newton-Raphson and Fast Decoupled methods were compared for a power flow analysis solution. Simulation is carried out using Matlab for test cases of IEEE 9-Bus, IEEE 30-Bus and IEEE 57-Bus system. The simulation results were compared for number of iteration, computational time, tolerance value and convergence. The compared results show that Newton-Raphson is the most reliable method because it has the least number of iteration and converges faster.
70 citations
Cites background from "Implementation of non-traditional o..."
...The power system is modeled by an electric circuit which consists of generators, transmission network and distribution network [1]....
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05 Apr 2017
TL;DR: In this article, an electrical model of a 1240 MW combined cycle power plant is developed on Electrical Transient Analyzer Program (ETAP) and load flow, voltage stability and short circuit analyses are performed.
Abstract: Load flow, voltage stability & short circuit analyses of a power system are essential for both design and operating stage performance monitoring and to ensure reliable grid operations by adequate protection scheme settings. In this research work, electrical model of a 1240 MW combined cycle power plant (CCPP) is developed on Electrical Transient Analyzer Program (ETAP) and load flow, voltage stability & short circuit analyses are performed. Effect of power grid voltage instability on system buses of the power plant is evaluated. Using load flow analysis that exploits Newton-Raphson algorithm, buses operating at under voltage due to power grid voltage instability are identified and their voltages are improved according to given voltage constraints that are based on buses criticality with respect to loads. On-load tap changers and reactive power compensation are used to improve steady state voltage stability. Optimal position for capacitor banks placement and number of capacitor banks are suggested by using optimal capacitor placement module of ETAP. The results of short circuit analysis are compared with short circuit current values experienced by the power plant sources. Consequently, favorable results have been accomplished through ETAP for all power system analyses.
13 citations
TL;DR: This project shows the short circuit and contingency analysis by using MI power technology, and explains about the different fault conditions such as symmetrical and unsymmetrical fault analysis in which the system leads to the stable condition.
Abstract: In this paper we have explained about the performance of IEEE-14 bus system by using Mi power technology. In the previous project the load flow analysis and stability analysis was found by using Mi power software. This project shows the short circuit and contingency analysis by using MI power technology. The maximum & minimum real and reactive power limit have been set & the results are obtained. The output result was found more efficient compared to the previous model. All the power system equipments were designed to withstand high efficiency and to withstand worst case condition. The MI power software is the advanced technology in order to improve the load flow analysis, stability analysis, short circuit and contingency analysis. This project explains about the MI power software to which it raises the efficiencies for the calculation of short circuit and contingency analysis. This project explains about the different fault conditions such as symmetrical and unsymmetrical fault analysis in which we are considering about the short circuit analysis. The transient and sub transient components are to be found and the system leads to the stable condition.
6 citations
TL;DR: In this paper, a mathematical algorithm based on the gradient method is proposed to implement OPF to a low-power electrical microgrid, with the objective of improving the voltage's characteristics and reducing the active power losses.
Abstract: First of all, a state of the art regarding the methods to solve optimal power flow (OPF) and its application in electrical microgrids are presented in this article. Afterward, a mathematical algorithm based on the gradient method is proposed to implement OPF to a low-power electrical microgrid, with the objective of improving the voltage's characteristics and reducing the active power losses. Finally, the proposed algorithm is applied to low-power electrical microgrid with photovoltaic generation to demonstrate the effectiveness of the method.
5 citations
Cites background or methods from "Implementation of non-traditional o..."
...The objective of the research was the development of new techniques that allow a better operation; this was done with the purpose of ensuring an economic generation and also meeting the demand of active and reactive power through simple and efficient algorithms [9]....
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...Optimal Power Flow Methods These mathematical methods have been developed for over 40 years, starting with classical mathematical optimization techniques [9]-[11], and more recently reaching genetic and artificial intelligence algorithms [4] [6] [9] [12] [13]....
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...State of Art An OPF solution provides information regarding to planning, economic programming, system control and the distribution of future expansion [9]....
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01 Jun 2017
TL;DR: In this article, a load flow analysis was performed on six bus bar system using Gauss Seidel method and the change of effects that come from choosing different slack buses to determine the critical stress points, voltage stability, in the multi-bus systems.
Abstract: The load-flow study is a numerical analysis of the flow of electric power in an interconnected system in power engineering. Simplified notation such as the one-line diagram and per-unit system is used for power-flow study and focuses on various features of AC power parameters, such as voltages, voltage angles, real power and reactive power. It analyses the power systems in normal steady-state operation. So, the load flow studies play a major role in analyzing of the power systems. Generally, power system buses are categorized into three classes named load bus, power grid bus and slack bus or swing bus. In fact, slack buses in the power system are chosen among PV buses and also voltage value and phase angle of slack buses must be set 1 and 0, respectively. In this study, analysis of power flow was performed on six bus bar system using Gauss Seidel method. The study analyzed the change of effects that come from choosing different slack buses to determine the critical stress points, voltage stability, in the multi-bus systems. At the beginning of the each power flow analysis, different busses which have generator were determined as the slack bus and the analysis was performed without increasing the load. The effects of changes in critical points were examined at the end of the all possible analysis.
4 citations
Cites background from "Implementation of non-traditional o..."
...Power flow study plays a key role in the planning of additions or expansions to transmission and generation facilities [1-2]....
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References
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06 Aug 2002
TL;DR: A concept for the optimization of nonlinear functions using particle swarm methodology is introduced, and the evolution of several paradigms is outlined, and an implementation of one of the paradigm is discussed.
Abstract: A concept for the optimization of nonlinear functions using particle swarm methodology is introduced. The evolution of several paradigms is outlined, and an implementation of one of the paradigms is discussed. Benchmark testing of the paradigm is described, and applications, including nonlinear function optimization and neural network training, are proposed. The relationships between particle swarm optimization and both artificial life and genetic algorithms are described.
35,104 citations
"Implementation of non-traditional o..." refers methods in this paper
...IMPLEMENTATION OF OPTIMIZATION TECHNIQUES The implementation of the discussed PSO based optimization techniques to solve the problem of optimal load flow solution has been analysed [5, 8]....
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TL;DR: A practical method is given for solving the power flow problem with control variables such as real and reactive power and transformer ratios automatically adjusted to minimize instantaneous costs or losses by Newton's method, a gradient adjustment algorithm for obtaining the minimum and penalty functions to account for dependent constraints.
Abstract: A practical method is given for solving the power flow problem with control variables such as real and reactive power and transformer ratios automatically adjusted to minimize instantaneous costs or losses. The solution is feasible with respect to constraints on control variables and dependent variables such as load voltages, reactive sources, and tie line power angles. The method is based on power flow solution by Newton's method, a gradient adjustment algorithm for obtaining the minimum and penalty functions to account for dependent constraints. A test program solves problems of 500 nodes. Only a small extension of the power flow program is required to implement the method.
1,575 citations
"Implementation of non-traditional o..." refers background in this paper
...The power balance equation expresses the fact that there are no power losses in any bus, which means that the input power tom a bus equals the output power from that bus [3, 9]....
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TL;DR: An implementation of an interior point method to the optimal reactive dispatch problem is described in this article, which is based on the primal-dual algorithm and the numerical results in large scale networks (1832 and 3467 bus systems) have shown that this technique can be very effective to some optimal power flow applications.
Abstract: An implementation of an interior point method to the optimal reactive dispatch problem is described. The interior point method used is based on the primal-dual algorithm and the numerical results in large scale networks (1832 and 3467 bus systems) have shown that this technique can be very effective to some optimal power flow applications. >
842 citations
"Implementation of non-traditional o..." refers background in this paper
...The power balance equation expresses the fact that there are no power losses in any bus, which means that the input power tom a bus equals the output power from that bus [3, 9]....
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Book•
28 Aug 2006TL;DR: In this paper, modern power system analysis was used to analyze modern power systems and their relationship with modern power control systems, including the power control system analysis and power control control systems.
Abstract: Modern power system analysis , Modern power system analysis , مرکز فناوری اطلاعات و اطلاع رسانی کشاورزی
605 citations
01 Jun 1982
TL;DR: Modern power system analysis, Modern power systemAnalysis, مرکز فناوری اطلاعات, کسورزی, امیران رسانی , اوشاوρز عاعد, £1,000, £2,500, £3,000 per megawatt-hour.
529 citations
"Implementation of non-traditional o..." refers background in this paper
...The main information obtained from the load comprises magnitudes and phase angles of load bus voltages, reactive powers and voltage phase angles at generator buses, real and reactive power flows on transmission lines together with power at the references bus, other variables being specified [ 1 , 2]. This information is essential for the continuous monitoring of the current state of the system and for analyzing the effectiveness of the ......
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...i = 1,…., NP where the crossover factor ρc ∈ [0, 1 ] is a constant and has to be set by the user STEP 8: Compute the value of objective function STEP 9: Apply selection and evaluation operation according to...
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