Algorithms and models of power losses in circuit breakers installed in networks
| Autor: | E. I. Gracheva, A. N. Alimova, A. N. Gorlov |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
business.industry
Computer science 020209 energy 020208 electrical & electronic engineering Electrical engineering lcsh:A 02 engineering and technology контактные соединения contact connections Power (physics) автоматические выключатели номинальный ток 0202 electrical engineering electronic engineering information engineering конструктивные особенности аппроксимирующие функции rated current design features lcsh:General Works circuit breakers approximating functions business Circuit breaker |
| Zdroj: | Vestnik MGTU, Vol 23, Iss 4, Pp 345-353 (2020) |
| ISSN: | 1997-4736 1560-9278 |
| DOI: | 10.21443/1560-9278-2020-23-4-345-353 |
| Popis: | Determination of the main characteristics of the topology and technical condition of equipment underoperating conditions is necessary for analyzing and assessing power and electricity losses in intrashoplow-voltage industrial power supply networks. A comparative analysis of the technical characteristicsof automatic circuit breakers VA57-31 (KEAZ), NSX100 TM-D (Schneider Electric), DPX3 160 (Legrand), Tmax XT1 TMD (ABB) has shown that the main technical parameters of the machines are close in their values. At that it has been found out that automatic switches of the BA57-31 series have the lowest value of power losses per pole (7.5 W), whereas the automatic switches of the Tmax XT1 TMD series have the highest value (10 W). Thus, under the operating conditions of the equipment, the lowest value of power and electricity losses is characteristic of low-voltage electrical networks with installed circuit breakers of the BA57-31 series, and the highest value of losses is noted in in-shop systems with installed circuit breakers Tmax XT1 TMD. Using catalog data, the dependences of active power losses in circuit breakers on rated currents have been established; the algorithms have been developed and the obtained dependences have been modeled using approximating functions. The standard deviation of the compiled approximating functions has been calculated. Analytical expressions of the dynamics of power losses per pole have been determined as a function of the rated current. The graphical dependences of the investigated parameters of low-voltage equipment have been presented. The developed models are recommended to be used to increase the reliability of the assessment and refinement of the amount of active power and electricity losses in low-voltage electrical networks of industrial power supply systems, agrotechnical complexes, and enterprises of the public utility sector. |
| Databáze: | OpenAIRE |
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