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Method and system for monitoring user-side harmonic pollution

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

Active Publication Date: 2010-06-09
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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Embodiment Construction

[0055] 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.

[0056] 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.

[0057] Such as 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 PC...

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Abstract

The invention relates to the field of electric energy quality monitoring, aiming to solve the problem that user-side harmonic pollution can not be correctly obtained in the prior art. The invention provides a method and a system for monitoring the user-side harmonic pollution. The method comprises the following steps of: collecting current data of a user-side electrifying apparatus by utilizing a current collecting device; collecting public connection point voltage data by utilizing a voltage collecting device; transmitting the current data and the public connection point voltage data to a system terminal; calculating the current data of emission harmonic of the user-side electrifying apparatus and an impedance value of the harmonic of the electrifying apparatus at the system terminal by utilizing a partial least-squares regression algorithm to acquire active power of the emission harmonic of the user-side electrifying apparatus; and sending alarming information when the active power of the emission harmonic exceeds the preset threshold. The invention has the advantages of conveniently monitoring the pollution to power grid by the user-side electrifying apparatus to reduce 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 non-linear 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 severe cases. Moreover, the currently widely used electric energy metering method cannot accurately distinguish between linear and nonlinear loads, as well as the harmonic power absorbed and generated by them, and cannot distinguish background harmonics when there are harmonic sources in the system. s...

Claims

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Application Information

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IPC IPC(8): G01R23/16G01R21/00
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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