نتایج جستجو برای: faults and power lines
تعداد نتایج: 16922405 فیلتر نتایج به سال:
Aalto University, P.O. Box 11000, FI-00076 Aalto www.aalto.fi Author Muzamir Isa Name of the doctoral dissertation Partial Discharge Location Technique for Covered-Conductor Overhead Distribution Lines Publisher School of Electrical Engineering Unit Department of Electrical Engineering Series Aalto University publication series DOCTORAL DISSERTATIONS 9/2013 Field of research Power Systems and H...
in this paper, we present a new method to determine the optimal location and parameter settings of unifiedpower flow controller (upfc) for removing voltage violations and transmission lines overloading. upfc isconsidered as the most powerful member of the facts devices, that it can control shunt and series power flow.this option gives to upfc the power to control the voltage profile and transmi...
Impulse over-voltages are very common phenomena in electric power systems. Switching impulses are created by switching surges or local faults while lightning impulses are due to lightning strikes to overhead lines. Both impulses can travel as waves in the system, damaging insulation components and equipment. This paper shows that there may well be a reduction in electric field strength of the i...
Transformers in power plants act as intermediaries between the power plant and the power grid, which are affected by electrical stresses such as switching, thermal stresses such as overload and arc, and chemical reactions in the dielectric oil. Acid and moisture components cause deterioration of transformer oil and paper insulation. Condition assessment of transformers is a method to predict an...
Multi-terminal flexible DC distribution line faults develop rapidly, and power electronic equipment has a poor ability to withstand overcurrent. To solve the aforementioned problem, unit protection scheme based on improved Grey Slope Relational Analysis (GSRA) of fault currents is proposed address issue achieving balance between reliability speed relay for lines. This uses current measured at b...
The electrical power industry experiences nowadays a significant need in modern techniques for increasing the capability of power transmission systems. The reason for this lies in growing power flows, caused by ris¬ ing power consumption, and in the deregulation of the electrical market, where power flows should be more flexible. These factors demand more transmission capability from the existi...
Conventional fault location methods using voltages and currents of one terminal are not applicable to multiterminal transmission lines. So far some techniques have been presented to solve fault location problem for multi-terminal transmission lines. In these methods, lumped or distributed frequency domain models of transmission lines have been used. In multi terminal lines, faulty section shoul...
The interline power flow controller (IPFC) is a concept of the FACTS controller for series compensation which can inject a voltage with controllable magnitude and phase angle among multi lines. This paper proposes a novel IPFC-Based Damping Neuro-control scheme using PSO for damping oscillations in a power system to improve power system stability. The addition of a supplementary controll...
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