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

Utegulov, Arman; Koshkin, Igor; Koshkina, A. I.

doi:10.1051/e3sconf/202022001032

Cited by 3 publications

(1 citation statement)

References 2 publications

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“…Due to the specific's mode of the quarry's electrical network, which is associated with the use of repeated short-term switching on energy-intensive motors, where the no-load currents rise in the shortest possible time to the latching currents [7][8][9]. All these oscillatory processes affect the deviations of the phase voltage values relative to the ground from the nominal values, thereby changing the zero-sequence voltage, which is directly dependent on the network insulation resistance.…”

Section: Introductionmentioning

confidence: 99%

"Approbation of the developed method for determining network insulation parameters on an operating excavator"

Kurabayev¹,

Tatkeyeva²

2023

BTOUEn

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"One of the factors that determine the safety of electrical installations in ungrounded AC systems is the insulation resistance to earth. Early recognition and fault clearance, accompanied by a change in the active and reactive components of the insulation conductivity in ungrounded AC systems, will ensure work safety in electrical installations. Due to the fact the scale of cases of electrical injuries continues to remain significant, despite the tightening of the requirements of regulatory and technical documentation and the creation of newer effective methods and protection equipment against electric shock, therefore, increasing the level of electrical safety in the operation of mining machines and complexes is an urgent task. The article depicts the results of the approbation of the developed method for determining network insulation parameters on an operating excavator. The developed method is based on measuring phase voltages and angles of their vectors before and after connecting an additional capacitance to the phase of the electrical network and to the earth. According to the developed method, numerical data of the insulation condition in an electrical network with a voltage up to 1000 V and the single-phase earth fault current were calculated. During the approbation of the developed method, the lack of the existing protective residual current device was identified. Keywords: network insulation, admittance, susceptance, neutral shift, zero-sequence voltage. "

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Section: Introductionmentioning

confidence: 99%

"Approbation of the developed method for determining network insulation parameters on an operating excavator"

Kurabayev¹,

Tatkeyeva²

2023

BTOUEn

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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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Experimental research of the developed method to determine the network insulation for ungrounded AC systems in laboratory conditions

Tatkeyeva

Kurabayev

Ataullaev

et al. 2022

2022 International Conference on Electrical, Computer and Energy Technologies (ICECET)

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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

Cited by 3 publications

References 2 publications

"Approbation of the developed method for determining network insulation parameters on an operating excavator"

"Approbation of the developed method for determining network insulation parameters on an operating excavator"

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

Experimental research of the developed method to determine the network insulation for ungrounded AC systems in laboratory conditions

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