Comprehensive Structural Reliability Assessment When Choosing Switchgear Circuits for 35–220 kV Step-Up Substations

Aleksandra V. Varganova, Aleksandr S. Irikhov, Anastasia A. Utesheva, Vadim R. Khramshin, Aleksandr S. Maklakov and Andrey A. Radionov ()
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Aleksandra V. Varganova: Power Engineering and Automated Systems Institute, Nosov Magnitogorsk State Technical University, 455000 Magnitogorsk, Russia
Aleksandr S. Irikhov: JSC Magnitogorsk GIPROMEZ, 455044 Magnitogorsk, Russia
Anastasia A. Utesheva: JSC Magnitogorsk GIPROMEZ, 455044 Magnitogorsk, Russia
Vadim R. Khramshin: Power Engineering and Automated Systems Institute, Nosov Magnitogorsk State Technical University, 455000 Magnitogorsk, Russia
Aleksandr S. Maklakov: Department of Automation and Control, Moscow Polytechnic University, 107023 Moscow, Russia
Andrey A. Radionov: Department of Automation and Control, Moscow Polytechnic University, 107023 Moscow, Russia

Energies, 2024, vol. 17, issue 7, 1-15

Abstract: The basic requirements for the design of a switchgear for main 35–220 kV step-down substations are reliability and efficiency. Switchgear circuits are chosen depending on the number of supply and transit lines and transformers, the substation’s place in the power supply system, and the area that can be allocated under the substation construction. The substation switchgear’s reliability depends on the circuit type and the equipment to be installed. When designing, as a rule, standard substation switchgear circuit solutions are chosen with often unreasonably overstated reliability indicators and, as a consequence, capital costs. This paper explores the issues of automated choice of the best option for the 35–220 kV substation switchgear circuit, considering its structural reliability and additional costs for the area allocated under the electrical unit. A distinctive feature of the work is a comprehensive accounting of the reliability indicators of the substation and the influence of the layout of switchgear circuits as a whole on the performance indicators of future electrical installations. The developed technique is used at the pre-design stages and allows for reducing further capital, maintenance, and repair costs for electrical units by up to 14.5%. The developed approach is implemented in the original TER CAD software product.

Keywords: reliability of power supply; reliability indicator; economic damage from power supply interruption; switchgear; substation (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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