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A method and system for monitoring user-side harmonic pollution

A harmonic pollution, user-side technology, applied in the direction of electrical devices, measuring devices, measuring electric power, etc., can solve problems such as inability to accurately calculate user-side harmonic pollution

Active Publication Date: 2012-02-22
NORTH CHINA ELECTRICAL POWER RES INST +1
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Problems solved by technology

[0010] The purpose of the present invention is to provide a method for monitoring user-side harmonic pollution, which is used to solve the problem that the user-side harmonic pollution cannot be accurately calculated in the prior art

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  • A method and system for monitoring user-side harmonic pollution
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  • A method and system for monitoring user-side harmonic pollution

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[0053] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with the embodiments and accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

[0054] Embodiments of the present invention provide a method and system for monitoring user-side harmonic pollution. The present invention will be described in detail below in conjunction with the accompanying drawings.

[0055] like image 3 Shown is the flow chart of the present invention detecting user side harmonic emission level, step 301, utilizes the current acquisition device of certain user side to obtain the current data I of user side pccnh , using the voltage acquisition device of the common connection point (PCC: Point of Common Coupling) to obtain the voltage data U of the PCC p...

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Abstract

The invention relates to the field of power quality monitoring, and provides a method and system for monitoring user-side harmonic pollution in order to solve the problem that user-side harmonic pollution cannot be accurately obtained in the prior art. The method of the present invention utilizes the current collection device to collect the current data of the electrical equipment on the user side, and uses the voltage collection device to collect the voltage data of the common connection point, and transmits the current data and the voltage data of the public connection point back to the system end, and uses the partial The least squares regression algorithm calculates the current data of the harmonics transmitted by the user-side electrical equipment and the impedance value of the harmonics of the electrical equipment, and obtains the active power of the harmonics transmitted by the electrical equipment on the user side. When the active power exceeds the preset threshold value, an alarm message will be sent. The beneficial effect of the present invention is that it is convenient to monitor the pollution of the power consumption equipment on the user side to the power grid, so as to reduce the fluctuation of the power supply quality of the power grid.

Description

technical field [0001] The invention relates to the field of power quality monitoring, in particular to a method and system for monitoring user-side harmonic pollution. Background technique [0002] With the wide application of various power electronic devices and nonlinear electrical equipment in various sectors of the national economy, the harmonic pollution in the power system, especially in the distribution network, is becoming more and more serious. The harmonic current generated by the harmonic source is injected into the power grid, which will reduce the power quality of other users on the same line (or adjacent feeder), and will cause related power quality disputes in serious cases. In addition, the currently widely used electric energy metering method cannot accurately distinguish linear and nonlinear loads, as well as the harmonic power absorbed and generated by them in the presence of harmonic sources in the system, nor can it distinguish the background harmonics....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R21/00G01R23/16
Inventor 徐永海邓春肖湘宁蔡维朱永强王建伟张云燕锁娟赵燕坤
Owner NORTH CHINA ELECTRICAL POWER RES INST
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