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The optimization of the size and location of Photovoltaic (PV) Distributed Generation (DG) is a method for reducing distribution networks loss, cutting costs for utilities, and integrating renewable energy into the power grid. However, this optimization problem is a difficult mixed continuous discrete problem that is difficult to solve efficiently. Herein, we propose a novel Sequential PVDG Placement...
In this paper, the phase shifting transformer (PST) is introduced in the Transmission Expansion Planning (TEP) problem considering significant wind power integration. The proposed planning model is formulated as a bilevel program which seeks to determine the optimal strategy for the network reinforcements and the PST locations. The objective of the upper level problem is to minimize the total consumer...
This paper presents an optimal placement of multi-type FACTS devices within the grid for maximizing the system loadability. The model selects the best device, location and setting considering a limited budget. The model is solved using genetic algorithms. Results shows that there is nonlinear relationship between the budget and the system loadability. Furthermore, there is a budget threshold above...
The inadequate power supply in Nigeria necessitates the implementation of other power generation media to augment the shortage and reduce heavy reliance on the National Grid. However, the cumbersome nature of these energy systems design which comprise equipment selection, renewable energy resources data collection, mathematical analysis and technical/ economic analysis is hectic and time consuming;...
A Model dedicated to EMI prediction in a DC-DC converter is presented in this paper. The model is analytical to be used by a deterministic optimization algorithm. This model not only predicts EMI but also thermal effects of the converter. Numerical and experimental validation of the model are performed regarding EMC aspects and perspectives for the final optimization purpose are presented.
Plug-in electric vehicles (PEVs) are receiving global attention. However, the integration of large-scale PEVs brings challenge to the existing power system. Therefore, it is necessary to develop a coordinated charging strategy for PEVs. In this paper, based on aggregate PEV charging load model, we propose a coordinated charging strategy for multiple stations in the distribution network, which aims...
This paper presents a numerical comparison between the second order cone relaxation for single-phase distribution systems and the semidefinite relaxation for the multiphase distribution systems for the optimal power flow problem considering unbalanced load and generation. Towards this end, the IEEE 37-bus test feeder is adapted using four different distribution line models for the various feeder segments...
This paper develops an iterative searching method to find the optimal power management strategy and component sizes for a hybrid power system that consists of a proton exchange membrane fuel cell, a chemical hydrogen production system, photovoltaic arrays, and a Li-Fe secondary battery set. In order to find the most suitable power management and component sizes, we build a MATLAB/SimPowerSystem simulation...
The energy balancing task for modular multilevel converters is solved as an optimization problem, resulting in optimized feed-forward circulating currents and common-mode voltage. In contrast to the classic approach of specifying circulating current components and common-mode voltage, a maximized subset of (transformed) arm energies are specified during optimization in order to identify optimized...
Demand Side Management (DSM) strategies are often associated with the objectives of smoothing the load curve and reducing peak load. Although the future of demand side management is technically dependent on remote and automatic control of residential loads, the end-users play a significant role by shifting the use of appliances to the off-peak hours when they are exposed to Day-ahead market price...
The Internet of things (IoT) will make it possible to interconnect and simultaneously control distributed electrical loads. Various technical and regulatory concerns have been raised that IoT-operated loads are being deployed without appropriately considering and systematically addressing potential cyber-security challenges. Hence, one can envision a hypothetical scenario when an ensemble of IoT-controlled...
In recent years, photovoltaic (PV) penetration has significantly increased in distribution networks. In the future, it will be more and more important to predict how much and where PV will be installed. Existing agent-based PV diffusion models just considered the spreading of residential PV, but actually there is a large amount of non-residential PV such as industrial and commercial. Its effect should...
Many benefits can derive by a massive integration of distributed energy resources (DERs) into distribution system; in this view a big issue concerns the treatment of the high number of information needed for a full exploitation of DERs, which require new functionalities and tools for their management and control. A possible solution is to introduce virtual aggregations, such as load areas and virtual...
In this paper, a design and a simulation of a PID controller are presented to control a DC motor speed. The design is proposed to increase a dynamic stability of the motor speed. Changing the speed setpoint values may generate oscillations, thus the controller is required to maintain a system stability. The PID controller is tuned using Differential Evolutionary (DE) and Particle Swarm Optimization...
The objective of this paper is to establish a methodology to evaluate the performance of candidate ship concept designs in the context of mission scenarios. To automate the design evaluation, it is necessary to properly set in an automated way system variables that identify the desired operating point. This is accomplished by defining a constrained static optimization problem. A cost function is minimized...
Anugrah Citra Boga is a food processing industry that produces meatballs as their main product. One of the problems in the company is the distribution of the products. Moreover, the distribution cost was never examined scientifically to obtain the optimal value. By simulating the distribution route to minimize the distribution time, then lower cost of the distribution will be expected. Therefore,...
This paper proposes an optimal energy management model for a grid-connected micro-hydrokinetic pumped hydro storage (MHK-PHS) hybrid system supplying the commercial load. The aim of the model is to minimize the energy costs through power-flow control variables and time-of-use (TOU) tariff scheme. The optimization problem will be solved through the use of the linprog solver in the MATLAB's optimization...
This paper proposes a novel approach to implement a real-time reconfiguration strategy to minimize the effect of the faults in a Shipboard Power System (SPS). In order to deal with the reconfiguration problem during fault situations in Medium Voltage DC (MVDC) SPS, a real-time Simulated Annealing (SA)-based reconfiguration technique is designed and implemented in the Real-Time Digital Simulator (RTDS)...
The energy-efficient management of complex industrial plants is a non-trivial task. While the traditional approach to improve energy systems efficiency is based on advanced hardware design, it is nowadays known that advanced management systems offer a unique opportunity to significantly enhance both efficiency and performance by mostly acting on software components. In this paper we consider the problem...
An offline optimal flexible load transfer strategy of more electric aircraft including operation mode and fault location of variable frequency starter generator is proposed, whose key innovation is to quantify variable operational safety margin using node voltage flexibility. Firstly, a series of scenes that show the fluctuation of load in different operation mode are generated through the Monte Carlo...
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