O que é subestações de transmissão ?
Autor: Prof. Cide | Publicado: 2014-01-19T17:31:00-03:00

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Sabemos que a elevação da
tensão &nbsp;reduz a corrente elétrica que
circula nas linhas de transmissão, conseqüentemente reduz as perdas elétricas
inerentes ao transporte da eletricidade. As subestações de transmissão são
aquelas localizadas nos pontos estratégicos de conexão com geradores,
consumidores e empresas distribuidoras. 







Na
conexão com os geradores, a função das subestações de transmissão é elevar o
nível de tensão da energia elétrica gerada. Já nas conexões com os consumidores
ou concessionárias, a função é rebaixar os níveis de tensão.







Nestas
subestações são instalados os transformadores e ainda os equipamentos de
seccionamento (chaves) para manobras de manutenção e de situações de
contingência, além de disjuntores e equipamentos de medição e proteção do
sistema, como medidores de tensão, corrente e pára-raios.







No
Brasil, a ANEEL é o órgão responsável em estipular os preços de transporte da
eletricidade a serem cobrados aos consumidores. Esses valores devem cobrir os
custos de capital, de operação e manutenção das empresas transmissoras de
energia elétrica.