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High-speed data acquiring and digital signal processing board based on FPGA (Field Programmable Gate Array)

A technology of digital signal processing and high-speed data acquisition, applied in the direction of measuring devices, instruments, measuring electronics, etc., can solve the problems of high technical requirements and shortages, and achieve the effects of high data security, fast analysis, and high precision

Active Publication Date: 2011-11-23
ANHUI NANRUI JIYUAN POWER GRID TECH CO LTD +1
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Problems solved by technology

However, there is no perfect traveling wave protection device available in the world at present.
There are two main reasons. One is the lack of suitable mathematical means to analyze high-frequency transient traveling wave signals; the other is that the technical requirements are too high. For example, the sampling frequency is required to be above 500kHz, and the processing time should be completed within 1-2 milliseconds. , the above problems cannot be solved by traditional technical means

Method used

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  • High-speed data acquiring and digital signal processing board based on FPGA (Field Programmable Gate Array)
  • High-speed data acquiring and digital signal processing board based on FPGA (Field Programmable Gate Array)
  • High-speed data acquiring and digital signal processing board based on FPGA (Field Programmable Gate Array)

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Embodiment Construction

[0025] see figure 1 , this example consists of three parts: analog signal input and A / D conversion module I, FPGA-based digital signal processing module II, and communication module III.

[0026] Analog signal input and A / D conversion module I: including signal conditioning circuit, A / D conversion module and A / D control circuit, wherein: the A / D part in the signal conditioning circuit samples three-way voltage, three-way current, sampling rate It is 800K, and it can also be set to 1.6 MHz. In order to match the pre-op amplifier, the secondary side of PT and CT requires a maximum output of ±10V; the A / D conversion chip in the digital-to-analog converter chip A / D selects AD8553 : Sampling rate 800K, built-in sample and hold circuit, using external reference voltage, external clock, low power consumption, low noise, three-state output.

[0027] FPGA-based digital signal processing module II: including the corresponding peripheral circuits and the A / D sampling module and data pro...

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Abstract

The invention discloses a high-speed data acquiring and digital signal processing board based on an FPGA (Field Programmable Gate Array), which is characterized by being integrally provided with an analog signal input and A / D (Analog-to-Digital) conversion module, a digital signal processing module and a communication module, wherein the analog signal input and A / D conversion module comprises a signal conditioning circuit and an A / D conversion module; the digital signal processing module comprises an FPGA module, a storage DDR2 and a data storage FLASH; the digital signal processing module is used for processing original sampling data through the steps of fault starting judgment, fault data shift out and wavelet transform processing; an embedded network is realized by the FPGA module; the communication module is connected with the FPGA module; and a networked physics layer chip is cooperated with an FPGA embedded network to realize the purposes of exchanging, collecting and calculating results with other plates or a background computer. According to the high-speed data acquiring and digital signal processing board, high-frequency transient state traveling wave can be synchronously collected and quickly processed.

Description

technical field [0001] The invention relates to an FPGA-based high-speed data acquisition and digital signal processing device, in particular to a device for high-speed, synchronous data acquisition and fast real-time processing of high-frequency transient signals in a power system. Background technique [0002] Traveling wave protection of transmission lines with ultra-high-speed operation performance is an important topic in the research of power system relay protection. However, there is no perfect traveling wave protection device available in the world at present. There are two main reasons. One is the lack of suitable mathematical means to analyze high-frequency transient traveling wave signals; the other is that the technical requirements are too high. For example, the sampling frequency is required to be above 500kHz, and the processing time should be completed within 1-2 milliseconds. , the above-mentioned problems cannot be solved with traditional technical means. ...

Claims

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Application Information

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IPC IPC(8): G01R31/00G01R31/08
Inventor 谢红福王皓何鸣张可张令意张骥王晓
Owner ANHUI NANRUI JIYUAN POWER GRID TECH CO LTD
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