Method for Monitoring Harmonic Sources of Power Network

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 electric power system automation, and in particular relates to a method for monitoring a harmonic source of a power grid. Background technique [0002] With the development of the country's economy and technology and the improvement of people's living standards, the power consumption of the power system is gradually increasing. At present, my country's power generation system is still dominated by thermal power generation that burns coal as an energy source. [0003] With the continuous consumption of fossil energy and people's increasing awareness of environmental protection, new clean energy represented by wind energy and solar energy is playing an increasingly important role in the entire energy consumption. Due to wind energy, solar energy, and time-varying nature, a large number of harmonics are inevitably generated in the above-mentioned clean energy power generation process. With the continuous increase of ...

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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 the main source of grid harmonics, so they cannot quickly Carry out emergency treatment for harmonic sources; if the harmonic sources that cause grid harmonics exceeding the standard are not quickly located and dealt with, the excessive grid harmonics may cause further faults in the grid, thereby affecting the reliability of the grid power supply

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