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Non-linear load metering device

A non-linear load and metering device technology, applied in measuring devices, measuring electrical variables, measuring time integration, etc., can solve problems such as large measurement errors, achieve the effect of improving accuracy and avoiding power leakage

Active Publication Date: 2014-02-26
BAODING JIUDING BAOHU ELECTRIC
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] The purpose of the present invention is to provide a metering device for nonlinear loads to solve the technical problem of large metering errors when traditional metering methods measure nonlinear impact loads

Method used

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Embodiment Construction

[0012] The invention consists of an ultra-broadband metering current transformer and a high-sampling-speed watt-hour meter dedicated to non-linear loads. Among them, the metering current transformer and the high-sampling-speed electric energy meter dedicated to non-linear loads are traditional connection structures. in such as figure 1 In the combined transformer circuit shown, on the secondary circuit of the voltage transformer, an intelligent negative flicker absorber is connected in parallel (the specific circuit structure of the voltage transformer is the same as the traditional one, and the circuit diagram is omitted.); see figure 2 , The current transformer is superimposed on the main transformer to provide a reverse electromotive force to compensate the voltage drop auxiliary transformer generated by the impedance, forming a passive zero-flux compensation current transformer.

[0013] Aiming at the short-term high multiple overload problem of impact load, the current ...

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Abstract

The invention discloses a non-linear load metering device. The non-linear load metering device is composed of an ultra-wideband metering current transformer and an electric energy meter, wherein the electric energy meter is especial for non-linear loads and high in sampling speed. An intelligent negative flicker absorber is connected to a secondary circuit of a voltage transformer in parallel. A passive zero-flux offset current transformer is formed by the current transformer through an auxiliary transformer, wherein the auxiliary transformer is arranged on a main transformer in an overlaid mode and used for providing reverse electromotive force to compensate for voltage drop generated by an impedor. The non-linear load metering device can solve the technical problem that big metering errors are caused when the non-linear impact loads are metered through a traditional metering method.

Description

technical field [0001] The invention relates to a metering device for a power grid. Background technique [0002] With the rapid development of the country's industry, there are more and more impact loads, such as high-frequency smelting, oil extraction, mining machines, excavators, high-speed automatic spot welding, high-speed wire drawing, and electrical equipment with DC speed regulation. The impact load is mainly manifested in the rapid change of current, wide range, large overload operation range, no periodic change, high harmonic content and different harmonic content and directions, accompanied by a large number of voltage flicker. These loads have an impact on the operation of the power grid, and even affect the stability of the power grid, and at the same time endanger the normal operation of power equipment. Non-linear impact load has a greater impact on electric energy measurement, because the design principles of most electric energy meters and transformers are ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R11/17G01R15/18
Inventor 张雅坤许亚辉张建勇焦鹏代新建
Owner BAODING JIUDING BAOHU ELECTRIC
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