Ferroresonance is a complex non-linear electrical phenomenon that can make thermal and dielectric problems to the electric power equipment. Ferroresonance causes overcurrents and overvoltages which is dangerous for electrical equipment. In this paper, ferroresonance investigation will be carried out for the 33kV/110V VT at PMU Kota Kemuning, Malaysia using ATP-EMTP simulation. Different precond...

Numerical optimization using recurrent finite-element simulations is a promising direction in design of power equipment. Previously, the speed and memory limitations of computers made such an approach unfeasible in comparison with analytical techniques. Recently, exponential improvements in the computer industry induced shifts toward numerical algorithms. The methodology presented here allows a...

Synchronous switching is one subject that have gained a great deal of relevance not only because of their potential for increasing reliability and for making a contribution to improve the overall power quality of the electric systems, but also for economic reasons. These concepts can be instrumental in minimizing the use of auxiliary components, such as pre-insertion resistors, in reducing equi...

This mathematical model allows calculation of Unit Commitment (hereinafter UC), providing for compliance with all technical limitations in the equipment state and electricity regime parameters to ensure the minimization of the total cost of electric power generation, as determined on the basis of notifications wholesale market participants on the composition and parameters of the generating equ...

In recent years, accidents of urban large scale sewage treatment plant at home and abroad have took a big loss to countries and individuals. Based on field research and scientific analysis of one large sewage treatment plant this paper use the safety check list to evaluate its safety and get that the main risk factors which should be focused on are poisoning and suffocation, electrical injuries...

This paper describes vibration diagnosis based on electric faults. These faults could appear in electrical equipment in general, but this paper focuses on the case of transformer, induction and dc motor. In order to do the diagnosis there are analysed vibration signals from the piezoelectric accelerometer. This accelerometer is installed on the frame of the equipment. The signals acquired are a...

Aim of this article is to clarify the potential use of EEG signal in modern information age. The basic principle of Brain Computer Interface (BCI) lies in the connection of brain waves with output device through some interface. BCI technology represents a communication interface between brain and computer. To sense electric signal from the brain, it is usually used an equipment based on the las...

The design and implementation of the instructional electric machine laboratory is described in this paper. The objectives of this project are to upgrade 50-year old laboratory equipment and to provide students with hands-on experience on up-to-date electric machines, drives and instruments, as well as to improve their understanding of the theory learned from lectures. Instead of the systems esp...

Most safety regulations and standards concentrate their efforts on intrinsic safety – the possibility that injury or damage could occur due to electric shock, fire, mechanical instability, sharp edges, etc. In this paper we are concerned with functional safety – where the hazards and risks depend upon the correct operation of devices, equipment, systems or installations. IEC 61508 [3] is the ba...

Simulation techniques to reduce the fuel consumption in hydraulic excavators are presented in three categories: first, a strongly non-linear dynamic simulation technique for a coupling system with a non-linear hydraulic system and a linkage system; second, a technique for evaluating fuel consumption in the engine when the engine powers the hydraulic pump in a digging operation performed by a hy...