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کفسابی انجام و آمورش پروژه های گمز GAMS - شبیه سازی اماده مقالات مهندسی برق قدرت با نرم افزار متلب مطلب MATLAB، سال انتشار مقاله 2014

شبیه سازی اماده مقالات مهندسی برق قدرت با نرم افزار متلب مطلب MATLAB، سال انتشار مقاله 2014

نویسنده :هادی
تاریخ:چهارشنبه 14 تیر 1396-03:26 ق.ظ




:14m1 کد

:عنوان مقاله

Impact of Unified Power-Quality Conditioner Allocation on Line Loading, Losses, and Voltage Stability of Radial Distribution Systems

:چکیده

Abstract—This paper presents an investigative study on the
impact of unified power-quality conditioner (UPQC) allocation on
radial distribution systems. A design approach for UPQC, called
sag-based design for phase-angle control for UPQC (UPQC-SPAC)
is proposed. The phase-angle shifting of the load voltage required
to mitigate a given value of voltage sag is determined and the same
is used during a healthy operating condition in order to provide
the reactive power compensation of a distribution network. To
study the impact of the UPQC-SPAC allocation on distribution
systems, it is placed at each node, except the substation node, one
at a time. The load-flow algorithm for radial distribution systems
is suitably modified to incorporate the UPQC-SPAC model. The
simulation results show that a significant amount of power-loss reduction,
under voltage mitigation, and the enhancement of voltage
stability margin can be obtained with an appropriate placement
of the UPQC-SPAC in a distribution network. The performance
comparison of the UPQC-SPAC with one previously reported
design approach shows that it is more efficient in undervoltage
mitigation. An appropriate allocation of the UPQC-SPAC is also
found to be beneficial for the networks with distributed-generation
units.
Index Terms—Power distribution planning, power loss, unified
power-quality conditioner (UPQC), voltage stability.

Sanjib Ganguly, Member, IEEE

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:14m2 کد

:عنوان مقاله

An Estimator-Based Distributed Voltage Predictive Control Strategy for AC Islanded Microgrids

:چکیده

Abstract—This paper presents an estimator-based voltage
predictive control strategy for AC islanded microgrids, which is
able to perform voltage control without any communication
facilities. The proposed control strategy is composed of a network
voltage estimator and a voltage predictive controller for each
distributed generator, where the voltage estimator serves as an
essential tool to obtain network voltages response without using
communication links, while the voltage predictive controller is
able to implement offset-free voltage control for a specified bus.
The dynamic performance of the proposed voltage control
strategy is analyzed through small signal analysis method, from
which the design guideline for the controller parameters is
formulated. Furthermore, the robustness of the proposed voltage
control strategy is investigated under a series of parameters
uncertainties, including the line parameters perturbation, load
parameters variation, different disturbance locations, LC filters
perturbation, output impedances perturbation and DG unit fault.
The simulation and experimental results show that the proposed
control approach is able to perform offset-free voltage control
without any communication links and has a good capability to
reject uncertain perturbations of islanded microgrids.

Index Terms—Distributed voltage predictive control, voltage
estimator, dynamic performance, robustness, islanded microgrid .

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:14m3 کد

:عنوان مقاله

Optimal sizing and location of SVC devices for improvement of 
voltage profile in distribution network with dispersed photovoltaic and wind power plants

:چکیده

a b s t r a c t
Intermittent power generation of wind turbines and photovoltaic plants creates voltage disturbances in power distribution networks which may not be acceptable to the consumers. To control the deviations of the nodal voltages, it is necessary to use fast dynamic control of the reactive power in the distribution network. Implementation of the power electronic devices, such as Static Var Compensator (SVC), enables effective dynamic state as well as a static state of the nodal voltage control in the distribution network. This paper analyzed optimal sizing and location of SVC devices by using genetic algorithm, to improve nodal voltages profile in a distribution network with dispersed photovoltaic and wind power plants. Practical application of the developed methodology was tested on an example of a real distribution network.
2014 Elsevier Ltd. All rights reserved.

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:14m4 کد

:عنوان مقاله

Method for Evaluating Battery Size Based on Loss of
Load Probability Concept for a Remote PV System

:چکیده

 

Abstract—Solar photovoltaic power is one of the potential
renewable energy generation technologies which have recently
received considerable attention globally. However, the stochastic
nature of these energy sources makes the power output difficult
to predict and control exactly and hence energy storage device is
expected to coordinate with such energy sources to maintain
system reliability. This paper presents a realistic evaluation
model of photovoltaic power and battery storage which can be
used in Monte Carlo simulation. The highly intermittent nature
of solar radiation, charge/discharge constraints of battery storage
and operating coordination between energy storage and system
are incorporated while modeling. The developed models are
applied for calculating battery size of photovoltaic system based
on reliability criteria such as Loss of load probability (LOLP) for
a remote case study area. Finally, the system performance is
assessed by increasing the peak demand of the study area.
Keywords—solar photovoltaic; battery storage; loss of load
probability; Monte Carlo simulation

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