Abstract: A system and method for determining an acquisition buffer size for use in processing signals, the method including determining a number of samples obtained for a predetermined number of line cycles based on digital signals received from an analog-to-digital converter (106), determining an integer number of line cycles needed for a predetermined target number of samples, and determining an acquisition buffer length based on the integer number of line cycles, as a length of time that can accommodate the determined integer number of line cycles while minimizing or avoiding partial line cycles. The method can further include determining whether the determined acquisition buffer length is within a threshold range, and when not within the threshold, continuing to store a previously determined acquisition buffer length instead of the determined acquisition buffer length. The method may be repeated to continually adjust the acquisition buffer length to minimize or avoid partial line cycles.

Abstract: A system and method for determining an acquisition buffer size for use in processing signals, the method including determining a number of samples obtained for a predetermined number of line cycles based on digital signals received from an analog-to-digital converter (106), determining an integer number of line cycles needed for a predetermined target number of samples, and determining an acquisition buffer length based on the integer number of line cycles, as a length of time that can accommodate the determined integer number of line cycles while minimizing or avoiding partial line cycles. The method can further include determining whether the determined acquisition buffer length is within a threshold range, and when not within the threshold, continuing to store a previously determined acquisition buffer length instead of the determined acquisition buffer length. The method may be repeated to continually adjust the acquisition buffer length to minimize or avoid partial line cycles.

Abstract: A device and method for processing a signal, the method including, by a modulator (1250), receiving an analog signal, modulating the analog signal, and outputting a data frame (1258); receiving, by a counter (1368), the data frame from the modulator and outputting at least two data word sets (1370) each in accordance with a respective one of at least two counter clocks (1372); filtering, by each of at least two digital filter sets (1374), a respective data word set of the at least two data word sets received from the counter, and each outputting, to a switch (1378), a respective filtered data word set (1376). The switch may be configured to select, as an output, one of the filtered data word sets. The switch may be configured to change to a different selected filtered data word set upon detection of a change in line frequency and/or phase.

Abstract: Apparatus and methodology are provided for measuring energy, particularly in a useful way for a multiphase system. Individual, like single-phase metrology blocks are provided to monitor energy in selected phases of a multiphase system. Individual data from a relatively upstream metrology block is passed to a relatively downstream metrology block, with the data stream being concatenated as the stream tracks from one metrology block to another. Energy data is coded as a predetermined small quantum of energy such that the last metrology block in a seriatim configuration of such metrology blocks may compute total energy consumption in the effective multiphase system by simple addition of the energy quantum data arriving at such last metrology block.

Abstract: Apparatus and methodology are provided for measuring energy, particularly in a useful way for a multiphase system. Individual, like single-phase metrology blocks are provided to monitor energy in selected phases of a multiphase system. Individual data from a relatively upstream metrology block is passed to a relatively downstream metrology block, with the data stream being concatenated as the stream tracks from one metrology block to another. Energy data is coded as a predetermined small quantum of energy such that the last metrology block in a seriatim configuration of such metrology blocks may compute total energy consumption in the effective multiphase system by simple addition of the energy quantum data arriving at such last metrology block.

Abstract: A device for measurement of electrical energy having current and voltage sensors 1, 2, a multiplexing circuit 8 and an analogue to digital converter 11. A microprocessor 9 controls the multiplexing circuit in order to supply the current and voltage signals alternately to the converter 11, the microprocessor 9 calculating the electrical energy at a moment in time using two values of the voltage situated around a current sample and using three samples of the current. By these means the time delay between samples of the voltage and current can be corrected.