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A Harmonic Source Identification and Responsibility Allocation Method Based on Distortion Power

A technology of distorted power and harmonic sources, applied in the field of power grids, can solve problems such as engineering application difficulties, no collection or metering devices, and harmonic impedance difficulties, and achieve the effects of strong operability, clear physical meaning, and improved economic benefits

Active Publication Date: 2018-12-11
STATE GRID FUJIAN ELECTRIC POWER CO LTD +4
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Problems solved by technology

[0009] The disadvantages of using the above method are as follows: (1) It is mainly based on harmonic current and harmonic impedance, but it is very difficult to obtain accurate harmonic impedance; (2) "Intervention method" carries out harmonic responsibility allocation, and artificial disturbances may It will have an adverse effect on the normal operation of the power system; (3) The calculation method for estimating harmonic impedance in the "non-intervention method" is relatively complicated, and the estimation accuracy of harmonic impedance is not high; The angle of the flow, considering the distortion power, not to mention the fact that there is no power collection or metering device, the engineering application is difficult

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  • A Harmonic Source Identification and Responsibility Allocation Method Based on Distortion Power

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Embodiment Construction

[0044] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0045] This embodiment provides a harmonic source identification and responsibility allocation method based on distortion power, such as Image 6 As shown, it specifically includes the following steps:

[0046] Step S1: Measure the public connection point, that is, the relevant physical quantities of the system at the PCC point and all users there;

[0047] Step S2: Calculate the harmonic distortion power D at the PCC point H ;

[0048] Step S3: judging the degree of pollution at the PCC point;

[0049] Step S4: Calculate the harmonic distortion power of each user at the PCC point;

[0050] Step S5: Determine the responsibility that the user should bear after multiple calculations.

[0051] In this embodiment, in the step S1, the required physical quantity is measured by using the smart meter and the filtering device, and the physical quantity incl...

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Abstract

The invention relates to a method for harmonic source identification and liability sharing based on distortion power. The method comprises a step S1 of measuring relevant physical quantities of a system at the position of a public connection point, namely a PCC point, and all users at the position; a step S2 of calculating harmonic distortion power DH at the position of the PCC point; a step S3 of judging a pollution degree at the position of the PCC point; a step S4 of calculating harmonic distortion power of each user at the position of the PCC point; and a step S5 of determining the responsibility the users should undertake after multiple calculations. The method is a unique proprietary technology for quantifying harmonic responsibility through the deformation power at present, harmonic impedance estimation in an existing method is avoided, the accuracy is higher, the operability is higher, and the method is combined with smart meters adopted in quantity in a smart power grid and is more suitable for engineering application.

Description

technical field [0001] The invention relates to the field of power grids, in particular to a method for harmonic source identification and responsibility allocation based on distorted power. Background technique [0002] With the development of social economy and smart grid, a large number of power electronics, electric arc furnaces, impact, intermittent devices and loads are increasingly connected to the system, and the distortion of current and voltage waveforms in the power system is becoming more and more serious. Huge harmonic pollution has been caused, which has endangered the safety and economical operation of the power grid and electrical equipment itself. For this reason, the analysis and comprehensive treatment of harmonic problems have become a subject of widespread concern at home and abroad. [0003] Harmonic source refers to the electrical equipment that injects harmonic current and generates harmonic voltage in the power grid, and usually refers to some nonli...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/00
CPCG01R31/001
Inventor 张逸肖先勇徐双婷林焱黄道姗刘文亮熊军
Owner STATE GRID FUJIAN ELECTRIC POWER CO LTD
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