Periodic waveform sampling data compression system and method for electric power system
A technology of sampling data and waveform synchronization, which is applied in the direction of electrical digital data processing, special data processing applications, electrical components, etc., and can solve the problems that the data is not recorded and the sampling rate cannot be too high
Active Publication Date: 2011-01-26
HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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Problems solved by technology
[0003] In order to solve the technical problem in the threshold trigger recording method existing in the prior art that the data when the power failure occurs is not recorded because the trigger setting is wrong or the storage space is not enough, and the continuous recording method is limited by the storage capacity. Due to the technical problem that the sampling rate cannot be too high, the present invention provides a periodic waveform synchronous sampling data compression system for power systems
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[0020] The present invention will be described in detail below in conjunction with the drawings:
[0021] See figure 1 The structure diagram of the power system periodic waveform synchronous sampling data compression system and method of the present invention. Such as figure 1 As shown, the power system periodic waveform synchronous sampling data compression system includes: a synchronous sampling unit 101, a comparator 102, a synchronous frequency multiplication unit 103, a time stamp generator 104, a data processing unit 105, and an encoding unit 106. The output terminal of the comparator 102 is respectively connected to the input terminal of the time stamp generator 104 and the input terminal of the synchronous frequency multiplication unit 103, and the output terminal of the synchronous frequency multiplication unit 103 is connected to the input terminal of the synchronous sampling unit. The output terminal of the synchronous sampling unit 101 and the output terminal of the t...
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The present invention relates to a compression system and method for electrical power system periodic waveform synchronous sampling data, wherein the system comprises a synchronous sampling unit, a comparator, a synchronous frequency doubling unit, a time-mark generator, a data-processing unit and a encode unit; the method comprises the following steps: 1. convert periodic signal to square wave signal through the comparator; 2. generate synchronous sampling pulse through the synchronous frequency doubling unit and the synchronous sampling unit performs synchronous digifax conversion under synchronization of synchronous sampling pulse and inputs convertion result into the data-processing unit, meanwhile, the time-mark generator records start moment of each frequency current and input time mark into the data-processing unit; 3. preliminary treatment to information through the data-processing unit; 4. encode to form a compressed file through the encode unit. The present invention performs preliminary treatment to sampled data before encode, enhances compression ratio, realizes high sampling frequency, overcomes influence to non-integer-period sampling, and improves data consistency.
Description
【Technical Field】 [0001] The invention relates to data compression technology in a power system, in particular to a data compression system and method for synchronous sampling of periodic waveforms of the power system. 【Background technique】 [0002] The power system recorder is divided into threshold trigger recording and continuous recording. Among them, the threshold-triggered recording method only records the data before and after the failure when the calculated data exceeds the set threshold. It cannot fully record the effective information of the power system, because the main purpose of the preset trigger value is to predict the possibility of the power grid. There is a risk that the trigger value is set to accurately capture the event that occurs. In many cases, the data when the power failure occurs is not recorded because of the wrong trigger setting or insufficient storage space. As for the continuous recording mode, the sampling rate cannot be too high due to the lim...
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IPC IPC(8): H02H7/26G06F17/00
Inventor 张东来王超张斌
Owner HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL