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Harmonic voltage responsibility measuring method based on harmonic power monitoring

A harmonic voltage and harmonic power technology, applied in the field of harmonic voltage responsibility measurement, can solve the problems of inaccurate harmonic responsibility, background harmonic harmonic impedance error, etc., to avoid the effect of direct measurement

Inactive Publication Date: 2016-05-11
SOUTHEAST UNIV
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  • Application Information

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Problems solved by technology

The premise of applying the linear regression method to accurately evaluate the harmonic responsibilities shared by users is that the background harmonics at the common connection point are basically stable. large error, which leads to inaccurate measurement of harmonic responsibility

Method used

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  • Harmonic voltage responsibility measuring method based on harmonic power monitoring
  • Harmonic voltage responsibility measuring method based on harmonic power monitoring
  • Harmonic voltage responsibility measuring method based on harmonic power monitoring

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Embodiment Construction

[0033] The technical solutions of the embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0034] Such as figure 1 As shown, the embodiment of the present invention provides a method for measuring harmonic voltage responsibility based on harmonic power monitoring, including the following steps:

[0035] Step 10) Obtain the electrical operating parameters of the system. The electrical operating parameters of the system include the average rated voltage U of the system bus N and the actual minimum short-circuit capacity S of the system bus k1 .

[0036] Step 20) Calculating the harmonic impedance of the system: using the electrical operating parameters of the system obtained in step 10), calculating the harmonic impedance of the system.

[0037] In said step 20), the harmonic impedance X of the system is calculated according to formula (1) h :

[0038] X h = ...

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Abstract

The invention discloses a harmonic voltage responsibility measuring method based on harmonic power monitoring. The harmonic voltage responsibility measuring method comprises the following steps of a step 10), acquiring an electric operation parameter of the system; a step 20), calculating a harmonic impedance of the system, namely calculating the harmonic impedance of the system according to the electrical operation parameter acquired in the step 10); a step 30), acquiring harmonic testing data, and forming a harmonic testing data set; a step 40), determining a harmonic current vector, namely calculating an angular phase difference between the harmonic current and the harmonic voltage based on the harmonic testing data acquired in the step 30); and a step 50), measuring the harmonic voltage responsibilities, namely measuring the harmonic voltage responsibilities at the user side and the system side according to the system harmonic impedance obtained in the step 20) and the harmonic current vector obtained in the step 40). The harmonic voltage responsibility measuring method has advantages of accurately dividing the harmonic voltage responsibilities at the system side and the user side, and facilitating targeted treatment to harmonic pollution of a power grid.

Description

technical field [0001] The invention belongs to the technical field of power quality analysis and control, and specifically relates to a method for measuring harmonic voltage responsibility based on harmonic power monitoring. Background technique [0002] In order to effectively control the harmonic pollution in the power grid, the State Bureau of Quality and Technical Supervision promulgated "Power Quality: Harmonics of Public Power Grids" in 1993 to make specific regulations on the allowable thresholds of harmonics in public power grids, but only the thresholds are not scientific. Therefore, it is necessary to quantitatively divide the harmonic responsibilities shared by the system and each user at the public connection point. [0003] The key to the quantitative division of harmonic pollution responsibility is to accurately estimate the harmonic impedance. At present, harmonic impedance estimation methods mainly include "interventional" methods and "non-interventional" m...

Claims

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Application Information

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IPC IPC(8): G01R19/00G01R25/00
CPCG01R19/00G01R25/00
Inventor 邱海峰顾伟王旭冲储佳伟
Owner SOUTHEAST UNIV
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