Composite transformation ratio self-adaptive intelligent current transformer device

Abstract

The invention discloses a composite transformation ratio self-adaptive intelligent current transformer device which comprises an iron core, a built-in hardware circuit unit, a power transformer primary winding, a metering current transformer primary winding, a power transformer secondary winding and a metering current transformer secondary winding. The iron core comprises a power supply iron coreand a metering iron core, the power transformer primary winding is a center-penetrating turn, and the power transformer secondary winding is uniformly wound on the power iron core. The metering current transformer primary winding is a straight-through turn, and the metering current transformer secondary winding is uniformly wound on the metering iron core. The power transformer primary winding isconnected in series with the metering current transformer primary winding, and the power transformer secondary winding and the metering current transformer secondary winding are connected with the built-in hardware circuit unit. The composite transformation ratio self-adaptive intelligent current transformer device is wide in metering range and high in metering precision, enables the problem of electric energy metering missing to be reduced and the metering accuracy to be improved, and guarantees the fairness of the electric energy transactions.

Description

technical field [0001] The invention discloses a compound transformation ratio adaptive intelligent current transformer device, which belongs to the field of transformer measurement. Background technique [0002] The types and sizes of electricity loads in different periods of time in the power system are different. The daily electricity load changes greatly, and the load on high-voltage lines in different seasons in the same area is also very different. Currently, the current transformer used for metering in the power system The selection of the current transformer is mainly based on the empirical judgment of residential and industrial electricity consumption, and the current transformer transformation ratio is selected by considering the annual growth rate of residential electricity consumption and the maximum load current of industrial users, and because the line load may reach 300% of the rated load, and the line load is below 30% of the rated value during the underestim...

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Problems solved by technology

[0003] Aiming at the deficiencies of the prior art, the object of the present invention is to provide a compound transformation ratio self-adaptive intelligent current transformer device to solve the problem of inaccurate measurement of current transformers existing in the prior art when the load is low or overloaded

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