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Wireless sensing network on-line insulation detection frequency adaptive measuring method

A technology of wireless sensor network and frequency detection, which is applied in the direction of frequency measurement device, conversion of frequency to pulse sequence, test circuit, etc., can solve the problem of spectrum leakage and achieve the effect of high-precision online measurement

Active Publication Date: 2016-05-11
DATONG POWER SUPPLY COMPANY OF STATE GRID SHANXI ELECTRIC POWER +1
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Problems solved by technology

[0004] In order to solve the problem of frequency spectrum leakage caused by non-full period truncation of sampling points in the existing wireless synchronous measurement system when the frequency of the power grid is constantly fluctuating, the present invention provides a wireless sensor network online insulation detection frequency self-adaptive measurement method

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  • Wireless sensing network on-line insulation detection frequency adaptive measuring method
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  • Wireless sensing network on-line insulation detection frequency adaptive measuring method

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Embodiment Construction

[0035] A wireless sensor network online insulation detection frequency adaptive measurement method, the method is realized by the following steps:

[0036] 1) Design of site hardware and system structure:

[0037] The wireless synchronous measurement system adopts the structure of one master station and multiple sub-stations; the hardware resources of the master station include SOPC chip, Ethernet, GPS interface, nRF905 module, and the SOPC chip is integrated with ARM processor hard core and FPGA chip; the hardware resources of the substation include FPGA chip and nRF905 module; the communication between each station is realized by wireless;

[0038] 2) Sampling clock synchronization between sites:

[0039] Each station uses the nRF905 module to realize sampling clock synchronization by means of wireless synchronization; at the same time, the master station regularly sends sampling frame synchronization commands to each sub-station, so that the sampling clock error between th...

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Abstract

The invention relates to wireless synchronization measuring systems, and specifically relates to a wireless sensing network on-line insulation detection frequency adaptive measuring method. The method solves the problem of spectrum leakage due to of non-integer-period truncation of the number of sampling points in the condition of continuous fluctuation of the grid frequency in the conventional wireless synchronization measuring system. The wireless sensing network on-line insulation detection frequency adaptive measuring method includes following steps: 1) design of site hardware and a system structure; 2) sampling clock synchronization between sites; and 3) tracking of the grid frequency and adjustment of the site sampling frequency: 3.1) tracking of the grid frequency; 3.2) adjustment of the site sampling frequency: after each site obtains the newest grid frequency, the site sampling frequency is adjusted in real time according to the number of the sampling points and the newest grid frequency, and one integer period can still be completely covered by 256 sampling points set by the site; and 3.3) starting of sampling. The method is applicable to insulation performance measurement of electric power equipment.

Description

technical field [0001] The invention relates to a wireless synchronous measurement system, in particular to a wireless sensor network online insulation detection frequency self-adaptive measurement method. Background technique [0002] The wireless synchronous measurement system (WSN) is widely used in the insulation performance measurement of power equipment. The principle of the commonly used dielectric loss measurement method is as follows: through each station, the leakage current (current flowing through the insulation layer) and the bus voltage of the power equipment are measured respectively. Then calculate the dielectric loss angle δ by calculating the phase difference between the leakage current and the bus voltage (the calculation formula of the dielectric loss angle δ is: δ=π / 2-(φi-φv), where φi is the phase angle of the leakage current , φv is the phase angle of the bus voltage), thus evaluating the insulation performance of the power equipment. [0003] At pres...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/14G01R23/10
CPCG01R23/10G01R31/14
Inventor 冯立伟钟睿赵宁陈运武李尚柏
Owner DATONG POWER SUPPLY COMPANY OF STATE GRID SHANXI ELECTRIC POWER
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