A TECHNIQUE OF MEASURING OF RESISTANCE OF A GROUNDING DEVICE
Journal Title: Електротехніка і Електромеханіка - Year 2016, Vol 0, Issue 3
Abstract
Introduction. Measurement of resistance of the grounding device (GD) by means of a three-electrode system. This requires not only the right choice of installation locations of measuring electrodes, but also the determination of the point of zero potential. Implementation of these requirements quite time-consuming, and in some cases impossible. Aim. Develop a new technique for measuring the electrical resistance of the GD. Task. The method of measuring the resistance of the GD with the help of a three-electrode setup is necessary to exclude the determination of the point of zero potential. Method. Mathematical modeling and calculation engine. Results. A three-electrode system for measuring the resistance of grounding devices (GD) for various purposes is considered. On the basis of Maxwell equations a theoretical substantiation of a new technique for measuring the resistance of any GD of any construction in random soil structure has been proposed. An equation system of the sixth order has been obtained, its solution makes it possible to measure its own mutual resistance in the three-electrode installation with sufficiently high accuracy. Peculiarities of drawing up a calculation scheme of substitution of a three-electrode installation with lumped parameters: self and mutual impedance. Use of the principle of reciprocity eliminates the need of finding a point of zero potential which is a rather difficult task. The technique allows to minimize the spacing of measuring electrodes outside the GD, which substantially reduces the length of wiring of the measurement circuit and increases the «signal-to-interference» ratio and also removes the restrictions on the development of the territory outside the GD being tested. Conclusion. The procedure allows to evaluate the self and mutual impedance grounding all the electrodes in a three-electrode measuring installation of the grounding resistance of the device without finding the point of zero potential.
Authors and Affiliations
I. V. Nizhevskyi, V. I. Nizhevskyi
Keywords
Related Articles
- EP ID EP297974
- DOI 10.20998/2074-272X.2016.3.08
- Views 77
- Downloads 0
ON SUBSTANTIATION OF SELECTION OF ECONOMIC AND MATHEMATICAL METHODS FOR THE ASSESSMENT OF ENERGY EFFICIENCY OF PRODUCTION FACILITIES
Research purpose is generalization and further development of economic- mathematical methods for ensuring energy-efficient operation mode of production facilities. The above methods can be used for selection of the most...
SLIDING MODE CONTROL OF THE DFIG USED IN WIND ENERGY SYSTEM
This paper, presents the application of the direct vector control using the sliding mode control (SMC) on the doubly fed induction generators (DFIG). The synthesis of the control laws is based on the model obtained by th...
ANALYSIS OF ENERGY EFFICIENCY OF OPERATING MODES OF ELECTRICAL SYSTEMS WITH THE TRACTION LOADS
Innovative scenarios of reliable energy supply of transportation process aimed at reducing the specific energy consumption and increase energy efficiency of the systems of electric traction. The paper suggests innovative...
DIRECT FREQUENCY CONVERTER WITH ARTIFICIAL AND NATURAL COMMUTATION FOR BRUSHLESS ASYNCHRONIZED MACHINES
The comparative analysis of direct frequency converters with artificial and natural- switching term of the cyclical control algorithm is presented; the recommendations for their using in brushless asynchronized machines...
CREATION OF HIGH-VOLTAGE PULSE CAPACITORS ON THE BASIS OF A COMPOSITE FILM DIELECTRIC
Research into feasibility of designing high-voltage pulse capacitors based on composite film dielectric systems is presented.