Detekcija i kontrola struje curenja solarnih invertora / Detection and Control of Leakage Current of PV Inverters

Energija, ekonomija, ekologija, 2, XXVI (2024) (стр 38-46)
 

АУТОР(И) / AUTHOR(S): Željko V. DESPOTOVIĆ, Miodrag VUKOVIĆ

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DOI: 10.46793/EEE24-2.38D

САЖЕТАК / ABSTRACT:

Struja curenja  u fotonaponskim (FN) sistemima, koja je takođe poznata kao rezidualna struja ili  „leakage current“ (engl.) je posledica parazitnog kapaciteta između FN sistema i zemlje (FN elektrane na tlu)  ili FN sistema i konstrukcije objekta koji je uzemljen (FN elektrane na krovu objekta). Kada parazitna kapacitivnost između FN sistema i elektroenergetske mreže formira petlju, napon zajedničkog moda će proizvesti struju zajedničkog moda na parazitnoj kapacitivnosti. Motivacija za pisanje ove kratke studije je potekla iz prakse gde su se autori suočili sa pomenutim problemom na konkretnoj FN elektrani izlazne snage 10kW. Stoga će glavna tema u radu biti topologije solarnih invertora i njihov dodatni uticaj na rezidualnu struju, kao i načini njene detekcije. Takođe biće dat pregled relevantnih standarda u ovoj oblasti i  neke moguće tehnike za kontrolu struja curenja u FN sistemima sa solarnim invertorima.

КЉУЧНЕ РЕЧИ / KEYWORDS:

FN elektrane, parazitna kapacitivnost, rezidualna struja, FN invertor, diferencijalna zaštita

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