ON THE ISSUE OF DESIGN OF GROUNDING SYSTEMS OF 330(220) KV SUBSTATIONS TO ENSURE THE ELECTROMAGNETIC COMPATIBILITY OF SECONDARY CIRCUITS
Journal Title: Електротехніка і Електромеханіка - Year 2018, Vol 0, Issue 5
Abstract
Purpose. The purpose of the work is to develop the fundamentals of the design methodology of grounding system design of substations with open switchgears 330 (220) kV, which is aimed at ensuring electromagnetic compatibility of secondary circuits of current transformers. Methodology. To carry out the research, the provisions of the theory of experiment planning, the theory of electrical circuits, mathematical modeling in the package Grounding 1.0 and Microsoft Excel were used. Results. During the one-factor experiments, the dependencies of the grounding system resistance and the voltage between the calculated points on the grounding system area, the size of the grid cell, the perimeter of the grounding system horizontal electrodes cross-section, the equivalent soil resistivity, the short-circuit current and the design factor were obtained. It is shown that the grounding system resistance and the voltage between the calculated points are practically independent of the depth of the horizontal electrodes in the depth range from 0.4 m to 1.4 m. Originality. The paper formulated three criteria for grounding system designing of substations 330 (220) kV, aimed at ensuring electromagnetic compatibility of secondary circuits. Practical value. The fundamentals of the methodology for grounding system designing are formulated according to the criterion of preventing false triggering of relay protections in emergency modes.
Authors and Affiliations
O. Yu. Glebov, D. G. Koliushko, G. M. Koliushko, E. P. Eremeeva
Keywords
Related Articles
- EP ID EP494974
- DOI 10.20998/2074-272X.2018.5.11
- Views 101
- Downloads 0
REGULARITIES OF ELECTROMAGNETIC PROCESSES OF A CONTACTLESS EXCITATION SYSTEM OF AN ASYNCHRONIZED GENERATOR BASED ON A CASCADE THREE-PHASE-THREE-PHASE VOLTAGE MODULATOR IN A SINGLE-STAR CIRCUIT
The regularities of electromagnetic processes occurring in a noncontact excitation system of an asynchronized generator based on a cascade three-phase - three-phase voltage modulator in a single-star circuit for the poss...
ON THE INFLUENCE OF THE LEVEL OF AN EXTERNAL MAGNETIC FIELD AND THE LENGTH ON THE MAGNETIC MOMENT OF CYLINDRICAL CORES
Purpose. Analysis of inhomogeneous magnetization of long cylindrical permalloy 50N cores by a uniform constant magnetic field and the influence of length and field level on their magnetic moment. Methodology. The magneto...
AN ANTHOLOGY OF OUTSTANDING ACHIEVEMENTS IN SCIENCE AND TECHNOLOGY. PART 22: INVENTION OF ELECTRIC ENERGY ACCUMULATORS
A brief essay on the history of inventing the main types of accumulators that store and supply electric energy to consumers is given.
INFLUENCE OF CORONARY DISCHARGE PARAMETERS ON THE EFFICIENCY OF LIGHTNING PROTECTION SYSTEM ELEMENTS
Purpose. Investigation of the formation of space charge in the region of the apex of lighting rod, under the action of the electric field of a thunderstorm cloud, to evaluate the efficiency of elements of lighting protec...
SIMULATION OF MAGNETIC INDUCTION DISTRIBUTION IN A COAXIAL LINEAR MOTOR WITH AXIAL AND RADIAL DIRECTION OF PERMANENT MAGNETS MAGNETIZATION
The paper presents results of computer simulation and experimental study of magnetic induction distribution in a coaxial linear motor air gap throughout the length of the runner active part at different heights of the ai...