Multi-path collecting method of smart ammeter

Abstract

The invention belongs to the field of electric power industrial automatic control, and in particular relates to a multi-path collecting method of a smart ammeter. The method comprises the following steps: firstly a voltage transformer and a current transformer are individually connected in each loop; then the voltage transformer and the current transformer are respectively connected with signal input ends of an electronic change-over switch I and an electronic change-over switch II, signal output ends of the electronic change-over switch I and the electronic change-over switch II are connected with an electric energy metering module, and meanwhile, a control pin of an MCU (micro controller unit) is connected with the electronic change-over switches; then the MCU sends change-over command to the electronic change-over switches, the electronic change-over switches perform switching in sequence regularly, switch from the first loop to the Nth loop sequentially, and the voltage transformers and the current transformers on the switched loops transmit the measured three-phase voltage and current signals into the electric energy metering module through the electronic change-over switch I and the electronic change-over switch II; and finally, the electric energy metering module calculates and processes the data. The multi-path collecting method of the smart ammeter provided by the invention has the advantages that multi-path electricity parameters can be collected, and the system structure is simple; and the multi-path collecting method of the smart ammeter is wide in application scope, and can be used for various occasions with different power inputs.

Description

[0001] technical field [0002] The invention belongs to the field of automatic control of the electric power industry, and in particular relates to a multi-channel acquisition method of an intelligent electric meter. Background technique [0003] The electric power industry is an important pillar industry of the national economy, and electric power, as a special commodity, plays a pivotal role in the market economy. At the same time, with the system reform of the electric power industry, the operation and management of the power grid is gradually moving towards commercialization, and the construction of the electric energy metering system is also developing with the development of electric power commercial operation. The main task of the electric energy metering system is to collect, process, store, and count the on-grid electricity of each power plant, the electricity at the junction point of the connection line, and the off-grid electricity at each electricity gateway, pr...

AI Technical Summary

Problems solved by technology

[0004] like figure 1 As shown, for the collection of electric energy of multiple three-phase circuits, the traditional scheme usually sets transformers for collecting voltage and current on each circuit, and also sets modules for measuring electric energy on each circuit. When the electric energy metering module in each circuit obtains the electric energy data and then transmits it to the electric meter, if there are six circuits, it is necessary to install six electric energy metering modules, the equipment investment is high, and the installation and maintenance are more troublesome

[0005] There is another solution, the measuring device on each circuit uses four three-phase meters such as three-phase ammeter, voltmeter, electric energy meter and power meter, so if there are 6 circuits, 24 three-phase meters are required, and the installation is more complicated. And the investment cost is high, which is not in line with the economic interests of enterprises and users

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