Intelligent integrated monitoring device

A comprehensive monitoring and intelligent technology, applied in the direction of measuring devices, measuring electricity, measuring electrical variables, etc., can solve problems such as protection misoperation, top distortion, device misjudgment, etc., and achieve accurate automatic monitoring, high degree of automation, and high crest factor Effect

Inactive Publication Date: 2013-06-05
SHANGHAI HUAJIAN ELECTRICAL EQUIP
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Problems solved by technology

It is mainly reflected in the fact that the sampling rate of the protection device is not enough to collect high-order harmonic information. When the high-order harmonic content rate is large, the protection will malfunction due to misjudgment
Traditional multi-function meters often have a relatively high sampling rate, but most of them can measure voltage and current with low crest factors.
When the harmonic distortion caused by the nonlinear load is very large, especially when the harmonic content exceeds the fundamental wave content, the crest factor of the electrical parameter will exceed the measurable range of the multi-function meter, so that the top distortion will appear during the sampling process. Cause misjudgment and misoperation of the device

Method used

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  • Intelligent integrated monitoring device

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Embodiment Construction

[0010] The present invention is further described below in conjunction with accompanying drawing:

[0011] See attached figure 1 , which is connected to the main processing module 1 and the sampling module 2, and the main processing module 1 is connected to the input and output module 3; the main processing module 1 controls sampling at a high sampling rate of 256 points per cycle to collect data, and the sampling module 2 is based on a 16-bit independent AD chip AD7606 Realization, the input and output module 3 includes an RS485 communication part, a man-machine interface part, a switching value input part and a relay output part, and the monitoring status quantity can be programmed and configured.

[0012] See attached figure 1 , the main processing module 1 is implemented based on the high-speed ARM core industrial-grade STM32 series MCU, with high integration, rich peripherals, and fast operation speed; the sampling module 2 is implemented based on the 16-bit independent ...

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Abstract

The invention provides an intelligent integrated monitoring device. The intelligent integrated device comprises a main processing module, a sampling module and input and output modules, and is characterized in that the main processing module is connected with the sampling module, and the main processing module is connected with the input and output modules. Compared with the prior art, the intelligent integrated monitoring device has the advantages of high sampling rate, high precision, wide linearity range, high peak factor and high automation degree, and can precisely perform automatic supervisory control on the operation condition on site.

Description

technical field [0001] The invention relates to an intelligent comprehensive monitoring device, which relates to the field of measurement and control in electric power systems. Background technique [0002] In existing low-voltage power distribution sites, more and more nonlinear loads are put into use, which means that the harmonic distortion of electrical parameters is very large. Traditional low-voltage protection, and the application of multi-function meters in these circuits with large harmonic distortion, have gradually appeared some problems. It is mainly reflected in the fact that the sampling rate of the protection device is not enough to collect high-order harmonic information. When the high-order harmonic content rate is large, the protection will malfunction due to misjudgment. Traditional multi-function meters often have a relatively high sampling rate, but most of them can measure voltage and current with low crest factors. When the harmonic distortion caused...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00
Inventor 王晓辉刘巍峰张锋孙旭熹刘悦
Owner SHANGHAI HUAJIAN ELECTRICAL EQUIP
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