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Method for setting power transmission quality evaluation segmented compensation parameter based on division operation

A technology for compensating parameters and quality evaluation, which is applied in calculation, electrical components, circuit devices, etc. It can solve the problems of not giving segments, etc., and achieve the effect of easy-to-use operation, simple technical solution, and few steps

Inactive Publication Date: 2018-02-09
HARBIN UNIV OF SCI & TECH
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Problems solved by technology

The research group has developed a brand-new evaluation method of power quality based on phase judgment, and applied for two invention patents, "A Power Grid Transmission Quality Evaluation System Based on Phase Judgment" and "A Power Grid Transmission Quality Based on Division Judgment". Quality Evaluation Method", in which, only specific numbers are given for how to select segmental compensation parameters, but no method for how to set them for different segments is given.

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  • Method for setting power transmission quality evaluation segmented compensation parameter based on division operation

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specific Embodiment 1

[0020] The method for setting segmental compensation parameters for power transmission quality evaluation based on division in this embodiment includes an original sine signal and a differential cosine signal. The differential cosine signal is obtained by performing a differential operation on the original sine signal. The differential cosine signal amplitude is divided to set the segment compensation parameters, including the following steps:

[0021] Step a, segmenting the cycle 2π, the number of segments is N, and N is an integer multiple of 8, and the phase angle range n=2π / N of each segment is calculated;

[0022] Step b, constructing an arithmetic sequence with N / 8+1 elements, the first item of the arithmetic sequence is 0, the tolerance is 2π / N, and the number of items is N / 8+1;

[0023] Step c, from the first element to the N / 8+1th element, respectively calculate the values ​​of sin (element) / cos (element), and obtain N / 8+1 calculation results corresponding to the elem...

specific Embodiment 2

[0028] The method for setting segmental compensation parameters for power transmission quality evaluation based on division in this embodiment includes an original sine signal and a differential cosine signal. The differential cosine signal is obtained by performing a differential operation on the original sine signal. The differential cosine signal amplitude is divided to set the segment compensation parameters, including the following steps:

[0029] Step a: Segment the period 2π, the number of segments is 32 (with the invention patents "A Power Grid Transmission Quality Evaluation System Based on Phase Judgment" and "A Power Grid Transmission Quality Evaluation Method Based on Division Judgment" applied by the application team The same data in), and 32 is an integer multiple of 8, calculate the phase angle range n=2π / 32=π / 16 of each segment;

[0030] Step b. Construct an arithmetic sequence with 5 elements, the first item of the arithmetic sequence is 0, the tolerance is π / ...

specific Embodiment 3

[0052] The method for setting segmental compensation parameters for power transmission quality evaluation based on division in this embodiment includes an original sine signal and a differential cosine signal. The differential cosine signal is obtained by performing a differential operation on the original sine signal. The differential cosine signal amplitude is divided to set the segment compensation parameters, including the following steps:

[0053] Step a. Segment the period 2π, the number of segments is 48 (with the invention patents "A Power Grid Transmission Quality Evaluation System Based on Phase Judgment" and "A Power Grid Transmission Quality Evaluation Method Based on Division Judgment" applied by the application team The data in are different), and 48 is an integer multiple of 8, calculate the phase angle range n=2π / 48=π / 24 of each segment;

[0054] Step b, constructing an arithmetic sequence with 7 elements, the first item of the arithmetic sequence is 0, the tol...

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Abstract

The invention relates to a method for setting a power transmission quality evaluation segmented compensation parameter based on division operation, and belongs to the technical field of power systems,measurement and control systems and detection and evaluation. The method comprises an original sinusoidal signal and a differential cosine signal, sets the segmented compensation parameter by performing division operation on the amplitudes of the original sinusoidal signal and the differential cosine signal, and comprises steps of: dividing a period into segments and calculating the range of phase angle of each segment; then constructing an arithmetic sequence, calculating sin (element) / cos (element) values based on the elements of the arithmetic sequence to obtain calculation results corresponding to the elements, and arranging the calculation results in an ascending order of the corresponding elements, marking every two adjacent calculation results as an interval, and labeling the intervals; and finally transmits the interval labels to the segmented compensation parameter. The method is used to set a segmented compensation parameter table, and lays a theoretical foundation for the implementation of a power quality evaluation means based on phase judgment.

Description

technical field [0001] The invention discloses a divisional compensation parameter setting method for power transmission quality evaluation based on division operation, which belongs to the technical field of electric power system, measurement and control system and detection and evaluation. Background technique [0002] Power quality refers to the quality of electric energy in the power system. The ideal electrical energy should be a perfect sine wave. Some interference factors will make the waveform deviate from sinusoidal, which will cause power quality problems. On the one hand, we study which influencing factors will lead to power quality problems, and on the other hand, we study how to evaluate power quality problems. [0003] As for how to evaluate power quality, there are multiple power quality indicators to evaluate power quality at this stage, including: voltage interruption, frequency deviation, voltage drop, voltage rise, instantaneous pulse, voltage fluctuatio...

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Application Information

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IPC IPC(8): G06Q10/06H02J3/00G06Q50/06
CPCG06Q10/06395G06Q50/06H02J3/00Y02P90/82
Inventor 赵烟桥王发正高冉
Owner HARBIN UNIV OF SCI & TECH