Harmonic contribution division method and harmonic contribution division system

A technology of responsibility and harmonics, applied in the field of harmonic responsibility division method and system, can solve the problems that cannot reflect the characteristics of harmonic voltage and harmonic current changes, cannot eliminate the influence of background harmonic fluctuations, and have low accuracy, so as to improve Partitioning accuracy, reducing calculation deviation, and good stability

Active Publication Date: 2015-06-10
GUANGZHOU POWER SUPPLY CO LTD +1
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Problems solved by technology

[0003] Most of the traditional harmonic responsibility division methods are based on the definition of harmonic responsibility, which is calculated by the average value of the measured harmonic voltage and harmonic current. Large, and cannot reflect the change characteristics of harmonic voltage and harmonic current, and cannot eliminate the impact of background harmonic fluctuations
The traditional harmonic responsibility division method has the disadvantage of low accuracy

Method used

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  • Harmonic contribution division method and harmonic contribution division system
  • Harmonic contribution division method and harmonic contribution division system
  • Harmonic contribution division method and harmonic contribution division system

Examples

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Embodiment Construction

[0021] A method for division of harmonic responsibilities such as figure 1 shown, including the following steps:

[0022] Step S110: collecting the harmonic voltage data of the bus and the harmonic current data of the harmonic source to be sought on the feeder.

[0023] Specifically, data collection can be carried out through voltmeters and ammeters. Collect the hth harmonic voltage data at bus X and the hth harmonic current data of the harmonic source to be sought on the feeder I · = [ I · ( 1 ) , I · ( 2 ) , . . . , I · ( N ) ] , Where N is the number of sampling points.

[0024] Step S120:...

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Abstract

The invention relates to a harmonic contribution division method and a harmonic contribution division system. The harmonic contribution division method comprises the following steps of acquiring harmonic voltage data of a bus and harmonic current data of a harmonic source to be calculated on a feeder line; calculating background harmonic impedance by using a leading fluctuation quantity method according to the harmonic voltage data and the harmonic current data; and dividing harmonic contributions of the harmonic source to be calculated by using a quantile regression method according to the harmonic voltage data, the harmonic current data and the background harmonic impedance. The background harmonic impedance is estimated by the leading fluctuation quantity method, fluctuation quantity with a leading function is screened out to calculate the background harmonic impedance, influences of background harmonic and measurement noise fluctuation on a background harmonic impedance estimation result are restrained effectively, and the background harmonic impedance is calculated accurately; and the background harmonic current is calculated according to the background harmonic impedance, and quantile regression is performed to obtain the harmonic contributions of the harmonic source. Calculation deviation caused by background harmonic fluctuation can be reduced, division accuracy is improved, and the stability and the data utilization rate are high.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a harmonic responsibility division method and system. Background technique [0002] With the development of modern power electronics technology, more and more non-linear devices are connected to the power grid, injecting a large number of harmonics into the power grid, causing voltage distortion, leading to the deteriorating power quality of the power grid, which greatly affects the The stable and safe operation of the power grid. Therefore, in order to provide users with safe and reliable electric energy, it is first necessary to clarify the responsibilities of users of each harmonic source, and to punish users of harmonic injection. [0003] Most of the traditional harmonic responsibility division methods are based on the definition of harmonic responsibility, which is calculated by the average value of the measured harmonic voltage and harmonic current. Large, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R23/16
Inventor 许中陆国俊陈静杨源马智远臧天磊栾乐黄裕春
Owner GUANGZHOU POWER SUPPLY CO LTD
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