Capacitores de potência: os bancos capacitivos em alta tensão, baixa tensão e os grandes bancos de capacitores

Abstract

The main purpose of this work is to cooperate with people directly responsible for the reactive compensation sector at energy concessionaries and industrial plants. This work presents: high and low voltage capacitor banks and great capacitor banks, informing bank ranges, standard specifications that must be followed and its prescription; how connection schemes of capacitor banks are normally utilized and installed in three-phases nets; adequate use of operating equipments, such as magnetic contactors and sectional switches of load opening; protection and control equipments, guiding users against the risks of inadequate protection; bank dimensioning; security recommendations, how to handle the banks; and safety fuse calculation. It was also covered, regarding the great capacitor banks: stage fractioning; bank formation, mostly the equations that help to study the behavior of great banks; characteristics of several connection schemes, its advantages and disadvantages; lightning arresters and grounding switches applications; and an example of dimensional calculation of capacitor banks. This example consists in the bank determination and configuration, choice of the safety fuse, TC’s , relays and grounding switches dimensioning.