Power grid harmonic wave monitoring method

A harmonic source and power grid technology, applied in the direction of electrical components, circuit devices, information technology support systems, etc., can solve problems such as voltage fluctuations, flicker, and affecting the reliability of power grid power supply

Active Publication Date: 2016-03-23
STATE GRID CORP OF CHINA +2
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Problems solved by technology

On the other hand, harmonics can also cause power quality problems such as voltage fluctuations and flicker
[0004] At present, although there are many harmonic sources in the grid, operators can only monitor a single grid harmonic source in real time; at the same time, if the grid harmonics exceed the limit alarm, operators cannot quickly determine

Method used

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Embodiment Construction

[0059] Such as figure 1 Shown is a flow chart of the method of the present invention: the method for monitoring the harmonic source of the power grid provided by the present invention includes the following steps:

[0060] S1. Obtain harmonic data of all typical harmonic sources in the power grid monitoring system;

[0061] S2. Based on the geographic information system, display the location of each typical harmonic source connected to the power system on the geographic map, and monitor the voltage and current of each harmonic source in real time;

[0062] Said typical harmonic sources include wind farms, photovoltaic grid-connected power generation, electric locomotives, rolling mill loads and electric arc furnaces

[0063] S3. Perform harmonic source analysis on the voltage and current of each harmonic source obtained in step S2;

[0064] S4. According to the harmonic source analysis result of step S3, according to the national harmonic standard and the voltage level of the harmonic ...

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Abstract

The invention discloses a power grid harmonic wave monitoring method. The power grid harmonic wave monitoring method includes the following steps that: harmonic wave data of all typical harmonic waves of a power grid system are acquired; positions where the typical harmonic wave sources are connected into the power system are displayed on a geographic map, and the voltage and current of the harmonic wave sources are monitored; harmonic wave source analysis is performed on the voltage and current of the harmonic wave sources; the harmonic wave sources are graded, colored and displayed in real time according harmonic wave states based on national standards; and harmonic wave sources exceeding the standards are specially labeled, and commonly-used filtering methods and specific filtering parameters are labeled. According to the power grid harmonic wave monitoring method of the invention, the parameters of the typical harmonic wave sources of the power grid system are acquired, are analyzed and calculated; hierarchical display and early warning are performed on the harmonic wave sources based on the standards; the harmonic wave sources exceeding the standards can be correspondingly warned against; corresponding filtering methods and the parameters of filters are provided. With the power grid harmonic wave monitoring method of the invention adopted, the states of the harmonic waves of a power grid can be monitored, analyzed, displayed and warned against clearly and comprehensively, and filtering guide can be provided for the harmonic wave sources. The method is simple, efficient and reliable.

Description

Technical field [0001] The invention belongs to the field of power system automation, and specifically relates to a method for monitoring harmonic sources of a power grid. Background technique [0002] With the development of national economy and technology and the increasing improvement of people's living standards, the power consumption of the power system has gradually increased. At present, my country's power generation system is still dominated by thermal power generation using coal as an energy source. [0003] With the continuous consumption of fossil energy and people’s increasing awareness of environmental protection, new types of clean energy represented by wind and solar energy are playing an increasingly important role in the overall energy consumption. Due to wind energy, solar energy, and time-varying nature, a large number of harmonics are inevitably generated during the above-mentioned clean energy power generation process. As the installed capacity of clean energy...

Claims

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Application Information

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IPC IPC(8): H02J13/00
CPCH02J13/00001Y04S10/40
Inventor 陈耀红陈仲伟陈剑刘毅程梦凌
Owner STATE GRID CORP OF CHINA
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