Correcção do factor de potência e filtragem de harmónicas em instalações eléctricas

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Correcção do factor de potência e filtragem de harmónicas em instalações eléctricas

Publicado: 13 de setembro de 2013 · Categoria: Cadernos técnicos

Deste documento

8 July 2008 1SDC007107G0201 Power factor correction and harmonic filtering in electrical plants Technical Application Papers Power factor correction and harmonic filtering in electrical plants Index Introduction................................................ 2 1 Generalities on power factor correction........................... 3 2 Technical advantages of power factor correction........ 4 2.1 Better utilization of electrical machines..... 5 2.2 Better utilization of electrical lines............. 5 2.3 Reduction of losses................................... 6 2.4 Reduction of voltage drop......................... 6 3 Economic advantages of power factor correction......... 7 4 Production means of reactive power 4.1 Synchronous alternators............................ 8 4.2 Synchronous compensators...................... 8 4.3 Static var compensators............................ 8 4.4 Banks of static capacitors......................... 9 5 Types of power factor (PF) correction 5.1 Distributed PF correction......................... 10 5.2 Group PF correction................................ 11 5.3 Centralized PF correction........................ 11 5.4 Combined PF correction.......................... 11 5.5 Automatic PF correction.......................... 11 6 Calculation of the power factor....................................................... 12 7 Calculation of the necessary reactive power................. 13 7.1 PF correction of three-phase motors....... 14 7.2 PF correction...