A method for setting specification parameters of a power meter

Abstract

The invention provides a specification parameter setting method of a power instrument. The method comprises the steps that 1) a specification parameter group is specified; 2) a configuration parameter of an electric energy metering module is calculated; 3) the metering error of the electric energy metering module when the specification parameter belongs to the specification parameter group is calibrated successively; and 4) one specification parameter is selected from the specification parameter group and serves as the specification parameter of the power instrument, the configuration parameter and calibration data of the electric energy metering module corresponding to the specification parameter are set in the electric energy metering module, and the power instrument of the selected specification parameter is obtained. During use, one specification parameter of the specification parameter group can be selected as the specification parameter of the power instrument, the power instrument of the selected specification parameter is obtained, the power instrument whose specification parameter can be set is used to replaces power instruments of different specification parameters, the total stock quantity of the power instrument is reduced, the stock cost of the power instrument is reduced, and the occupation space of the power instrument during stock is reduced.

Description

technical field [0001] The invention relates to the technical field of electrical measurement, in particular to a method for setting specification parameters of an electric meter. Background technique [0002] In the power system, power meters are used to measure the power consumption of power users, such as figure 1 Shown is the functional block diagram of the single-phase power meter. The voltage and current of the power user are converted into voltage signals and current signals by the voltage sensor and the current sensor, and then sent to the single-phase electric energy metering module of the single-phase power meter. The phase electric energy metering module completes the measurement of electric parameters, such as voltage, current, active power, reactive power, active electric energy and reactive electric energy, etc. The processor of the single-phase electric energy meter reads the active electric energy of the single-phase electric energy metering module and perfor...

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Problems solved by technology

[0008] The specification parameters of the power meter are provided by the purchaser: voltage specification, current specification, pulse constant, accuracy level, the manufacturer produces the power meter with the specification parameters specified by the purchaser, and the power meter has memory of the electric energy metering module corresponding to the specified specification parameters Therefore, the specification parameters of the power meter cannot be changed after the production is completed, otherwise, the measurement accuracy of the power meter may change

[0009] Since there are many types of specifications of power meters, if a certain number of power meters are stocked corresponding to each specification parameter, the total number of power meters in inventory will be too much, which will increase the inventory cost of power meters and the cost of power meters in stock. Occupies space, so a power meter with settable specifications is needed to replace the power meters with multiple specifications, reducing the number of specifications of power meters, thereby reducing the total inventory of power meters and reducing the inventory cost of power meters and the space occupied by power meters when in stock

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