Method for automatically recording voltage-losing meter-leaking electric energy in three-phase three-wire electric energy measurement

Abstract

The invention discloses a method for automatically recording pressure loss leakage electric energy in three-phase three-wire electrical metering, and is characterized in that: (1) the voltage and current signals of the load circuit are collected; (2) a sample / hold circuit samples the alternating current signals of voltage and current in each period; (3) digital quantity is converted to access a data memory through an A / D converting circuit; (4) a logical operation circuit calculates actually calculated active energy W and actually calculated reactive energy Q; (5) whether three phases have any phase to be disconnected is judged; (6) if the phase is disconnected, the logical operation circuit further records the calculated active energy W and reactive energy Q when disconnection in the step (4); simultaneously, the active energy W' and reactive energy Q' of load consumption are calculated according to principle of shifting; (7) the active energy W'-W and reactive energy Q'-Q of leakage are calculated when disconnection; the invention further discloses an electric energy meter, and is characterized in that the electric energy meter comprises a collection data circuit of the electric energy meter, the sample / hold circuit, the A / D converting, the original data memory and the logical operation circuit that are connected in turn. The invention solves the problem of remedying pressure loss leakage electric energy in three-phase three-wire electrical metering, thereby improving the accuracy of remedying pressure loss leakage electric energy and combining the recorded pressure loss leakage electricity meter with the electric energy meter.

Description

【Technical field】 [0001] The invention relates to a method and an electric energy meter for automatically recording the electric energy of a voltage loss leakage meter in three-phase three-wire electric energy metering, which are usually used in a method and a device for measuring active electric energy and reactive electric energy in an electric power system. 【Background technique】 [0002] In the three-phase three-wire electric energy measurement, when one phase voltage of the electric energy meter loses voltage due to various reasons, the electric energy meter will leak the electric energy. There are shortcomings such as inaccurate calculation, too much workload or too high cost in the existing methods of supplementing the missing meter electric energy. [0003] In order to overcome the above disadvantages, the present invention makes beneficial improvements. 【Content of invention】 [0004] The invention overcomes the disadvantages of the prior art, and provides a meth...

AI Technical Summary

Problems solved by technology

[0002] In the three-phase three-wire electric energy measurement, when one phase voltage of the electric energy meter loses voltage due to various reasons, the electric energy meter will leak the electric energy.

Existing methods of supplementing the missing meter electric energy have disadvantages such as inaccurate calculation, too much workload or too high cost.

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