Operation Frequency Control Method of Electric Energy Metering Signal Processor

Abstract

A system and method for controlling operation frequency of an electric energy measuring signal processor are applied to the digital signal processor in the field of electric energy measurement. According to the method, firstly, the position of a current operation step is obtained by obtaining an appointed bit position of a system counter, wherein the system counter is used for recording the number of commands carried out by the digital signal processor after the digital signal processor begins to operate; then, the number is compared with a preset number so that whether an appointed operation frequency point is reached or not can be determined, and then whether operation with a lower operation frequency is conducted or not is determined. By means of the method, the signal processor can achieve operation dispatching of a filter under various operation frequencies conveniently, and then reduction of power dissipation is facilitated.

Description

【Technical field】 [0001] The invention relates to a control method of a digital signal processor, is particularly suitable for the field of electric energy measurement, and is convenient for realizing the operation frequency control method of multiple down-sampling operations on multi-channel signals. 【Background technique】 [0002] Electric energy meters have gradually developed from early mechanical electric energy meters, counter digital electric energy meters, and liquid crystal simple digital electric energy meters to smart electric meters. Its functions have gradually increased from simple metering energy, and gradually added reactive power metering, effective value measurement, fundamental wave power metering, and fundamental wave effective value measurement. In the recent development trend, the measurement and monitoring of DC and AC signals such as relay status and external electromagnetic field have been added. These put forward higher requirements on the function...

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Problems solved by technology

[0005] The purpose of the present invention is to provide an operation frequency control method of an electric energy metering signal processor, which is used to solve the problem that the existing electric energy metering signal processor cannot perform calculations on the same signal at multiple operation frequencies, resulting in high power consumption

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