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This paper presents an adaptation of a new meta-heuristic algorithm known as Cuckoo Search (CS) to solve the distribution network reconfiguration problem (DNRC), where the objective is to minimize the real power losses subject to constraints such as voltage levels in nodes, current levels in branches, and maintaining a radial topology in the distribution test system. The performance of the proposed...
At universities around the world, web based on-line distance education is increasingly being offered for advanced engineering education. This includes electric power engineering where individual courses and even complete university degrees are being awarded based on internet based distance education resources and on-line interaction between students and their instructors.
Distributed Generation (DG) sources such as solar and wind power sources are gaining an increased popularity due to the various advantages they provide over the traditional fossilfuel-based power generation sources. However, their effects on the system operation, while expected to be positive, are not yet fully understood. In this paper, we study the effect of adding DG sources to the grid on the...
This paper presents an evaluation of the performance of power circuit breakers (CBs) using direct digital sampling and the signal processing techniques applied to antenna signals obtained from the arc created during the switching process. Some researches have shown that arcing produces impulsive radio-frequency radiation. Therefore, from timing analysis of the received and recorded impulses, the switching...
This paper presents a sensorless scalar volt per hertz (v/f) control technique for maximum power tracking of a grid-connected wind-driven Brushless Doubly-Fed Reluctance Generator (BDFRG). The proposed generator has two stator windings namely; power winding, directly connected to the grid, and control winding, connected to the grid through a bi-directional converter. The capability of the proposed...
Energy is very important for countries which are developing rapidly, such as Turkey, during the fossil fuel prices are increasing. In this respect, renewable technologies such as PV systems are gaining importance in the world gradually due to its eco friendliness, easy applicability and increasing efficiency. Today, incentives for PV systems are being provided to private sector companies and people...
The losses of a new axial flux permanent magnet generator (AFPMG) have been explored theoretically. The machine is designed and analyzed by a electromagnetic finite element method (FEM) simulation package. The suggested generator is three phase with two rotors and a stator between them. The rotors have 32 rare earth disc-type magnets at two sides and the stator has 24 coils. The losses are calculated...
The electrification of vehicles is now considered an effective solution that will reduce fuel consumption and emissions as well as increase energy security through the diversification of available energy sources. The electric energy generated from low-emission renewable resources will play a vital role to meet the electricity needs of the transportation sector and will also address concerns about...
In this paper, a novel cascade nonlinear controller is proposed for output voltage regulation of the DC-DC buck/boost converter in a wide range of operation using exact feedback linearization approach. In the developed controller, only feedbacks from the state variables of the system are used and changes of the load resistance and input voltage aren't needed. To solve the non-minimum phase problem...
The immense deployment of renewable energy resources (RES) have gained significant interest in distribution networks, which creates great challenges for distribution network planners and operators. One way of mitigating such challenges is to combine the integration of RES with energy storage systems (ESS). However, appropriate combination of both RES and ESS requires new planning methodologies in...
This paper proposes an accurate computation for the parameters of the two diode model for the Copper Indium Diselenide (CIS) thin film PV module. The approach is based on a hybrid solution, i.e. by combining the traditional analytical method with the soft computing technique known as the Differential Evolution (DE). In contrast to conventional modelling methods which rely on keeping several parameters...
This paper reports the preliminary results of a new designed harvester system called as the contactless piezoelectric wind energy harvester (CPWEH). It consists of three piezoelectric layers attached with the non-magnetic bars in different lengths in order to produce maximal power for a wide wind wide speed regime. Preliminary magnetic design has proven that three layers can be excited by the magnetic...
This paper presents a control strategy for a standalone wind-energy conversion system using Permanent Magnet Synchronous Generator (PMSG). The presented control strategy aims at regulating the load voltage in terms of magnitude and frequency under different operating conditions including windspeed variation, load variation and the unbalanced conditions. The wind generating-system under study consists...
Energy management systems are used for more efficient use of electric energy. Energy management systems generally just contain demand-side management. A possible solution for demand side management in the existing structures is the use of smart plugs. The smart plug can be defined as a port that monitors and records the parameters such as power consumed, the current drawn and connection point voltages...
In modern times daily increase in load has resulted in transmission network being operated beyond its stability limit. This has considerable impact on power system operations, as it may lead to outage of transmission lines, which includes sudden switching out of lines and its consequent alteration of the structure of the transmission system. In this paper, line vulnerability is investigated through...
Supply quality issues have been addressed, viewed, and reported by the electricity authority in the Kingdom of Saudi Arabia (KSA) and its customers with the common goal of improving the performance of the electricity system and ensuring that the electricity supply service is delivered according to the applicable national regulation and standard and with sufficient reliability and security. This paper...
For the torque control of interior permanent magnet synchronous machines (IPMSMs), it is necessary to set a pair of reference currents based on the reference torque. At base speed the reference currents should be chosen in a way on which total current is minimized. This strategy provides copper-loss minimization and is known as Maximum Torque per Ampere (MTPA). Current methods present various disadvantages,...
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