The Method for Determining the Insulation Parameters in an Asymmetric Network With a Voltage of Up to 1000 V

Utegulov, Bolatbek

doi:10.1109/fareastcon.2019.8934153

Cited by 2 publications

(3 citation statements)

References 1 publication

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“…To develop the method for determining the ACRLI in AENIN by voltage up to 1000 V, we use the mathematical formula for determining the network's capacitive conductivity of insulation from [2]:…”

Section: Theoretical Basis Of the Developed Methodsmentioning

confidence: 99%

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Experimental Studies of the Developed Method for Determining the Insulation Parameters in an Asymmetric Network by a Voltage up to 1000 V at Mining Enterprises

2020

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In the work experimental studies of the developed method for determining the insulation parameters in an asymmetric electrical network by a voltage up to 1000 V at mining enterprises were carried out. It is based on measuring the module values of line voltage, angle of phase shift between vectors of damaged phase voltage relative to the ground and line voltage at two other phases, as well on measuring the module value of damaged phase voltage relative to the ground before and after connecting additional capacitive conductivity between the network’s phases and the ground. The results of experiment showed that the developed method for determining the insulation parameters has satisfactory accuracy and safety when operating three-phase electrical networks by voltage up to 1000 V at mining enterprises.

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Section: Theoretical Basis Of the Developed Methodsmentioning

confidence: 99%

“…When developing a method for determining the capacitive conductivity of insulation in the AENIN by voltage up to 1000 V at mining enterprises under operating voltage, we use a method for determining the insulation parameters in a symmetric network with an isolated neutral by voltage up to 1000 V [2].…”

Section: Theoretical Basis Of the Developed Methodsmentioning

confidence: 99%

Experimental Studies of the Developed Method for Determining the Insulation Parameters in an Asymmetric Network by a Voltage up to 1000 V at Mining Enterprises

2020

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“…We assume a symmetrical three‐phase electrical network, in which the network insulation admittance between the phases and the earth are equal

{y_a} = {y_b}{\rm{\;}} = {y_c}\;

; accordingly, the zero‐sequence voltage is zero, and the voltages between the phases and the earth are equal to each other [4, 5].…”

Section: The Theoretical Basismentioning

confidence: 99%

Mathematical description of the method for ungrounded AC systems to determine the network insulation

Kurabayev

Suvorov

Utegulov

et al. 2022

IET Generation Trans & Dist

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For the safety of humans and animals in the vicinity of single‐phase earth faults in ungrounded AC systems, the development of methods for monitoring the condition of insulation and protection against electric shocks is an important issue. This paper presents a method for determining insulation parameters in ungrounded AC systems, which provides: (1) Satisfactory accuracy; (2) easy measurements of the voltage modules magnitude; (3) safety when working in electrical installations. The proposed method is based on measuring the zero‐sequence voltage module and phase‐to‐earth voltage module, as well as the angle of phase‐to‐earth voltage vector and zero‐sequence voltage vector before and after connection of additional conductivity between a phase and the earth. In addition, the obtained insulation parameters enable the zero‐sequence current to be decomposed into an active and reactive component, thus ensuring accurate compensation of capacitive currents. By monitoring the state of the active conductivity value, the value of the single‐phase earth‐fault current can be determined at an early stage and the relay protection can thus be correctly set. Consequently, by knowing the insulation condition parameters, the single‐phase earth‐fault currents can be monitored and reduced more effectively, and thus the step voltage, which determines the degree of safety.

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The Method for Determining the Insulation Parameters in an Asymmetric Network With a Voltage of Up to 1000 V

Cited by 2 publications

References 1 publication

Experimental Studies of the Developed Method for Determining the Insulation Parameters in an Asymmetric Network by a Voltage up to 1000 V at Mining Enterprises

Experimental Studies of the Developed Method for Determining the Insulation Parameters in an Asymmetric Network by a Voltage up to 1000 V at Mining Enterprises

Mathematical description of the method for ungrounded AC systems to determine the network insulation

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