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Harmonic responsibility dividing model and harmonic responsibility calculation method

A calculation method and responsibility technology, applied in the field of power quality harmonic responsibility calculation

Inactive Publication Date: 2019-03-29
ELECTRIC POWER RES INST OF GUANGXI POWER GRID CO LTD
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Problems solved by technology

But in fact, among multiple users connected on the same bus, their harmonic currents may enhance or cancel each other out, and the individual harmonic current emission level of each user and the harmonic voltage responsibility that each user should bear are not necessarily in a proportional relationship.

Method used

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  • Harmonic responsibility dividing model and harmonic responsibility calculation method
  • Harmonic responsibility dividing model and harmonic responsibility calculation method
  • Harmonic responsibility dividing model and harmonic responsibility calculation method

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Embodiment Construction

[0072] In order to better understand the present invention, the present invention will be further described below in conjunction with accompanying drawing and specific embodiment:

[0073] Such as figure 1 As shown, a harmonic responsibility division model includes a bus X and several users, one side of the bus X to which it belongs is connected to the power supply end of the power system, and the other side of the bus X is connected to several users respectively.

[0074] A harmonic responsibility calculation method of a harmonic responsibility division model includes the following steps:

[0075] (1) Suppose user D is one of several users, and user D is a main nonlinear harmonic source; the hth harmonic current of user D is recorded as The hth harmonic voltage monitored at bus X is recorded as Then the hth harmonic current of user D The hth harmonic voltage monitored at line X is recorded as There are the following relations:

[0076]

[0077] Among them, Z hX i...

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Abstract

The invention relates to the technical field of responsibility calculation for power quality harmonics, in particular to a harmonic responsibility dividing model and a harmonic responsibility calculation method. The method includes the step of calculating the harmonic responsibility of each user on a bus by solving the equivalent harmonic impedance and the background harmonic voltage. The maximumlikelihood estimation method is adopted in the equivalent harmonic impedance, so that the obtained result is high in precision and calculation effect, the harmonic responsibility of each user on the bus can be accurately calculated, and the method is suitable for popularization.

Description

technical field [0001] The invention relates to the technical field of power quality harmonic responsibility calculation, in particular to a harmonic responsibility division model and a harmonic responsibility calculation method. Background technique [0002] The voltage distortion at the busbar in the power system is the result of the joint action of disturbing users. If it is detected that the content rate of a certain harmonic current of a certain user at the bus exceeds the standard, it is considered that the user is responsible for the corresponding harmonic voltage distortion generated by this bus. But in fact, among multiple users connected on the same bus, their harmonic currents may enhance or cancel each other out, and the individual harmonic current emission level of each user and the harmonic voltage responsibility that each user should bear are not necessarily proportional. Therefore, in order to quantitatively divide the harmonic responsibilities among various...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R23/16
CPCG01R23/16
Inventor 郭敏金庆忍陈卫东姚知洋
Owner ELECTRIC POWER RES INST OF GUANGXI POWER GRID CO LTD
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