Multifunctional single-phase digital watthour meter

Abstract

The invention provides an arrangement for realizing multifunctional single-phase digital watthour meter which comprises, three ways of analog-digital converter (ADC), at least two groups of effective value arithmetic elements and an electricity stealing judgment unit, at least a power arithmetic element and at least a numerical frequency conversion element, the electricity stealing judgment unit includes an electricity stealing judgment logic circuit and a read-write register, which configures different electricity anti-theft judgment normalized value according to different environment of applications, the electricity stealing judgment logic circuit proceeds judgment computation based on the effective value of the two ways of electric current and value configured in the register, and sends out the electricity stealing signal and right current instantaneous value for participating the power computation, the power arithmetic element calculates the energy power, and the numerical frequency conversion unit completes the impulse output conversion.

Description

Technical field [0001] The utility model relates to a multi-functional architecture of a single-phase digital watt-hour meter, in particular to the architecture of a single-phase digital watt-hour meter that realizes anti-stealing electricity and judging different electricity theft standards according to different application environments. Background technique [0002] Early single-phase digital watt-hour meters only completed the function of measuring active energy, including 2 analog-to-digital converters (ADC), 1 set of multipliers, 1 set of low-pass filters (LPF), 1 integrator (INTER) and 1 digital frequency converter. With the development of electric energy measurement applications, single-phase digital watt-hour meters with anti-stealing functions have appeared. On the basis of simple single-phase digital watt-hour meters, an analog-to-digital converter and a stealing judgment circuit are added. Among the different current paths of the roads, the one that meets the po...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the deficiency that the existing single-phase digital watt-hour meter architecture cannot meet all the different application environments, the utility model adopts the readable and writable register value as the judgment standard to judge electricity stealing, which can flexibly adapt to various electricity stealing judgments Standard, which reduces the requirements for hardware, and can also meet some special application requirements, such as superimposing two currents as an effective current value

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