Abstract: The present invention refers to a centralized system and process for measuring, registering, reading and billing data referring to electric energy consumption of a plurality of consumers (14-17), which receive the electric energy through a plurality of respective consumer connecting cables (18-21), connected to a main electric energy inlet cable (12) which, in turn, is connected to the electric energy distributing network (11).
Type:
Grant
Filed:
April 23, 1997
Date of Patent:
November 3, 1998
Assignee:
Centro de Pesquisas de Energia Eletrica - Cepel
Inventors:
Reynaldo Sigiliao Da Costa, Landulfo Mosqueira Alvarenga, Roberto Pereira Caldas, Ary Vaz Pinto Junior, Julio Cesar Gomes Pimentel, Cesar Jorge Bandim, Fabio Cavaliere De Souza
Abstract: A process for measuring electricity consumption, especially suitable for small consumers, comprises the steps of continuously measuring consumer current, integrating the current with time to obtain a value (A.h) relating to consumption; adjusting the integration in function of the voltage of the network to obtain an adjusted value (A.sub.v.h) proportional to a preestablished unit of electricity consumption; and computing the number of preestablished units obtained to provide a value proportional to chargeable electricity consumption. The adjustment to the integration is carried out in accordance with four bands of network voltage, in the form of a nominal band on either side of the nominal network voltage, an overvoltage band, an extended voltage band below the nominal band, and an undervoltage band.
Type:
Grant
Filed:
July 3, 1996
Date of Patent:
April 7, 1998
Assignee:
Centro De Pesquisas De Energia Eletrica--Cepel