نتایج جستجو برای: digsilent
تعداد نتایج: 267 فیلتر نتایج به سال:
The recent growing diffusion of dispersed generation in low voltage (LV) distribution networks is entailing new rules to make local generators participate in network stability. Consequently, national and international grid codes, which define the connection rules for stability and safety of electrical power systems, have been updated requiring distributed generators and electrical storage syste...
Distributed Generation (DG) unlike centralized electrical generation aims to generate electrical energy on small scale as near as possible to the load centers, interchanging electric power with the network. Moreover, DGs influence distribution system parameters such as reliability, loss reduction and efficiency while they are highly dependent on their situation in the distribution network. This...
This study presents a novel auxiliary damping control strategy to depress subsynchronous resonance (SSR) oscillations in nearby turbine generators. In the proposed control strategy, SSR damping is achieved by adding turbine generator speed as a supplementary signal at the active power loop of the rotor-side converter (RSC) of doubly-fed induction generator (DFIG)-based wind farms. To design the...
There is cause and effect relationship between increase in load due to increasing penetration of electric vehicles (EV) load that causes unbalanced conditions and affect the power quality such as voltage degradation and even damage the equipment if the system is not properly managed. This paper presents detailed review of energy supply and management in conjunction with load synchronization thr...
In the recent years use of Special Protection Schemes due to impact of notable these schemes in improving the performance of power systems has found increasing usage. The purpose of this paper is design a suitable and fast special protection schemes to deal with extreme contingency that will led to collapse of power network if they occurred. So at the first, for a clear form of power tran...
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...
The reactive power control mechanisms at the smart inverters will affect voltage profile, active losses and cost of procurement in a different way. Therefore, this paper presents an assessment cost–benefit relationship obtained by enabling nine inverters. first eight are available literature include IEEE 1547?2018 standard requirements. ninth mechanism is optimum proposed paper. It formulated t...
This article discusses the problem of minimizing power loss in unbalanced distribution systems through phase-balancing. is represented by a mixed-integer nonlinear-programming mathematical model, which solved applying discretely encoded Vortex Search Algorithm (DVSA). The numerical results simulations performed IEEE 8-, 25-, and 37-node test demonstrate applicability proposed methodology when c...
This document presents a novel methodology to optimize the power system frequency response based on implementation of decentralized controllers. The proposed method focuses control internal rotor angle in selected generator, which allows its governor act as controller that requires input local measurements. Through optimization process, it is first possible establish set optimal parameters for ...
Power flow (PF) is a fundamental tool for operation, automation and optimization of the power systems. Due to nonlinearity PF system equations, classical solutions are computationally very demanding. As common approach in solving nonlinear linearization potential technique which can simplify accelerate calculations. In this context, paper proposes linear fast iterative method based on fixed-poi...
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