Harmonic responsibility calculation method for multiple users on single bus

A computing method, multi-user technology, applied in spectrum analysis/Fourier analysis, etc.

Inactive Publication Date: 2019-07-12
ELECTRIC POWER RES INST OF GUANGXI POWER GRID CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But in fact, among multiple users connected on a single bus, the harmonic currents may enhance or cancel each other out, and the individual ha

Method used

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  • Harmonic responsibility calculation method for multiple users on single bus
  • Harmonic responsibility calculation method for multiple users on single bus
  • Harmonic responsibility calculation method for multiple users on single bus

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Embodiment Construction

[0081] In order to better understand the present invention, the present invention will be further described below in conjunction with accompanying drawing and specific embodiment:

[0082] A single-bus multi-user harmonic responsibility calculation method includes the following steps:

[0083] (1) if figure 1 As shown, set up the harmonic responsibility model of single busbar multi-user; Described model comprises busbar X, some users; Described several users are connected with one side of busbar X; The other side of described busbar is connected with power system power supply terminal;

[0084] (2) Assuming that 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 The relationship between the harmonic current injected by the harmonic source and the harmonic voltage at bus X is as follows:

[0085]

[0086] Among them, Z hX is the hth ...

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Abstract

The invention relates to the technical field of electric power quality harmonic responsibility calculation, in particular to a harmonic responsibility calculation method for multiple users on a singlebus. Equivalent harmonic impedance is solved to calculate the harmonic responsibility of each use for the bus, and the equivalent harmonic impedance adopts a complex least square regression method. Since the equivalent harmonic impedance does not greatly change, the equivalent harmonic impedance serves as a constant, background harmonic voltage is affected by other harmonic source injection harmonic currents in a system, fluctuation is generated in short time, the background harmonic voltage is converted into calculation for the equivalent harmonic impedance, so that the equivalent harmonic impedance is solved through the complex least square regression method, and the harmonic responsibility of each user for the bus can be solved. Therefore, an obtained result is high in accuracy, a calculation effect is good, the harmonic responsibility of each user for the bus can be accurately calculated, and therefore, the method is suitable for promotion.

Description

technical field [0001] The invention relates to the technical field of harmonic responsibility calculation of power quality, in particular to a method for calculating harmonic responsibility of single busbar and multiple users. 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 a certain harmonic current content rate of a certain user at the bus bar exceeds the standard, it is considered that the user is responsible for the corresponding harmonic voltage distortion generated by this bus bar. But in fact, among multiple users connected to a single bus, the harmonic currents may enhance or cancel each other out, and the individual harmonic current emission level of each user is not necessarily proportional to the harmonic voltage responsibility it should bear. Therefore, in order to quantitatively divide the harmonic responsibilities among various harmonic sources...

Claims

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Application Information

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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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