Measurement process for measuring rechargeable electricity consumption in the electricity grid and electronic electricity meter

摘要

PCT No. PCT/BR95/00001 Sec. 371 Date Jul. 3, 1996 Sec. 102(e) Date Jul. 3, 1996 PCT Filed Jan. 11, 1995 PCT Pub. No. WO95/19573 PCT Pub. Date Jul. 20, 1995A 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 (Av.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. An electricity meter for performing the process includes a current transformer (TC) having a primary which is the consumer load line (15) and a secondary which generates a current representative of the current in the load line, a circuit connected to the secondary to integrate the value of such current with time, a detector for detecting when the integration circuit reaches a preestablished chargeable unit value of consumption of electricity, and a counter associated with the detector to sum the detected units of consumption.