نتایج جستجو برای: roy billiton ieee 31 bus test system
تعداد نتایج: 3037006 فیلتر نتایج به سال:
Here, a novel Gaussian bare-bones bat algorithm (GBBBA) and its modified version named as dynamic exploitation (DeGBBBA) are proposed for solving optimal reactive power dispatch (ORPD) problem. The plays fundamental role in ensuring stable, secure, reliable well economical operation of the system. GBBBA employs distribution updating positions an effort to mitigate premature convergence problem ...
In this paper, the Static Var Compensator (SVC) has been used to improve dynamic behaviour of power system. To do this, a new objective function is formulated considering power loss reduction, voltage profile improvement and loadability margin decrease. Other contribution of this research is proposing a novel structure for Particle Swarm Optimization (PSO) algorithm through modifying the initia...
This paper proposes a pricing system for power system security in deregulated electricity market that includes voltage stability constraint in a multi-objective OPF problem. The OPF maximizes social benefit, as well as the distance from the voltage-collapse point. While pricing system security, ancillary service such as reactive power has been included. Effect of N–1 contingency on pricing is a...
Abstract This paper addresses the challenge of protecting electrical networks in presence distribution generators (DGs). The use DGs affects fault currents, leading to miscoordination between protection relays and causing constraints on network reliability. To tackle this issue, authors propose an adaptive scheme (APS) based a modified pelican optimization algorithm (MPOA) active database manag...
Restructuring of electric industry has seriously affected the operation and planning process of electric power systems. Due to the unbundling process and new market requirements, a set of new challenges and goals have been introduced in the field of transmission planning. Moreover, the uncertainty level of input data to planning process has been increased significantly. In this paper first, the...
This paper proposes a new voltage stability assessment method based on vector analysis method. This index extraction process relies on measurements of active and reactive powers from connected buses to the generator buses. Therefore, a limit for beginning of voltage collapse is determined based on the maximum power transfer theory. On the other hand, when the system requires load shedding, a ne...
In this paper a new algorithm is presented for power systems controlled islanding based on constrained spectral clustering. The proposed algorithm minimizes two objective functions of power flow disruption in transmission lines and generation - demand imbalance in islands to ensure transient stability within islands and to minimize necessary actions in reconfiguration of transmission system, ge...
Allocation of measurement devices is a necessity of distribution system which is an application of state estimation. In this paper, the problem of active and reactive measurement devices is modeling using a multi-objective method. The objectives of the problem are to minimize the use of measurement devices, increase in state estimation output, improve the state estimation quality and reduce cos...
Distribution load flow (DLF) calculation is one of the most important tools in distribution networks. DLF tools must be able to perform fast calculations in real-time studies at the presence of distributed generators (DGs) in a smart grid environment even in conditions of change in the network topology. In this paper, a new method for DLF in radial active distribution networks is proposed. The ...
BACKGROUND In the past few decades, a significant volume of work has been carried out on various aspects of the state estimation problem to estimate an optimum state vector of the power system. This problem has been focused on, in previous studies regarding the computational efficiency and numerical robustness in view to find point estimates for system state parameters. This current investigati...
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