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Metering condition characteristic detector

A technology of working condition characteristics and detectors, applied in the direction of instruments, measuring devices, measuring electrical variables, etc., can solve the problem of no solution, long communication delay time, lack of long-term sampling and recording data and monitoring pulse comparison data in real time Synchronous upload and other issues

Inactive Publication Date: 2016-01-20
ELECTRIC POWER RES INST STATE GRID JIANGXI ELECTRIC POWER CO +2
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Problems solved by technology

However, the existing wave recording equipment is mainly used to analyze power grid faults, and does not have the function of measurement and measurement error comparison; the existing measurement equipment has the measurement function, but does not have the ability to upload long-term sampling wave recording data and monitoring pulse comparison data in real time; Neither can be used to analyze the impact of different metering conditions on metering
[0003] There is no existing solution for combining the energy metering data of the monitoring equipment and the monitored electric energy meter with the wave recording data of the working condition. The conventional RS485 method of reading electric energy has a long and unstable communication delay time, which cannot be compared with the working condition and reference Power comparison

Method used

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  • Metering condition characteristic detector

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Embodiment Construction

[0011] The specific embodiment of the present invention is shown in Fig. 1 .

[0012] In this embodiment, a metering working condition characteristic detector includes a DSP processor, an A / D converter, an SD card, a memory, a display and a peripheral interface. The three-way voltage and three-way current sampling signals of the grid-connected point are connected to the input port of the DSP processor through the A / D converter; the switch input is directly connected to another input port of the DSP processor; the DSP processor is connected to the SD card and the memory respectively , display, external communication interface and other interconnections.

[0013] The detector of this embodiment adopts TI's high-speed DSP processor as the core controller, which has a main frequency of 300MHZ and abundant peripheral interfaces. AD uses a 16-bit high-precision analog-to-digital converter to sample the 3-phase voltage and 3-phase current of the grid-connected point, and through the...

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Abstract

The invention provides a metering condition characteristic detector, including a DSP (Digital Signal Processor), an A / D converter, an SD card, a memory, a display and an external interface. The detector timely and accurately collects voltage and current data according to pulses measured by an onsite meter, and records voltage and current waveforms for a long time. Meanwhile, active pulse count and reactive pulse count of an external ammeter and positions of voltage and current sampling points are recorded at the same time. By means of the active pulse count and reactive pulse count of the external ammeter, errors under different metering conditions and during a long period are analyzed. The detector uses master station software for analyzing influences of different metering conditions on metering. Uploaded data and analyzed data can be used as important research data to be stored. The detector has functions of metering and metering error comparison, and also has functions of sampling recording data for a long time and monitoring and timely and synchronously uploading pulse comparison data. The detector can analyze influences of various voltage and current disturbances such as harmonic waves, three phase unbalance and voltage and current transient on electric energy metering.

Description

technical field [0001] The invention relates to a metering working condition characteristic detector, which belongs to the technical field of electric power metering. Background technique [0002] The existing power quality monitor is a networked, multi-channel, high-performance, high-precision on-line power quality monitoring device, which has automatic measurement, liquid crystal graphics, tabular data display, intelligent statistical analysis, multi-event alarm and Recording, large-capacity monitoring data storage and network data communication functions, it is a high-tech monitoring equipment that integrates modern digital signal processing, computer communication, the latest power quality theory and software engineering ideas. However, the existing wave recording equipment is mainly used to analyze power grid faults, and does not have the function of measurement and measurement error comparison; the existing measurement equipment has the measurement function, but does n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R11/54
Inventor 张春强赵言涛易丁邓佳明
Owner ELECTRIC POWER RES INST STATE GRID JIANGXI ELECTRIC POWER CO
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