Filter capable of real-time monitoring and automatic compensation

Abstract

The invention relates to a filter capable of real-time monitoring and automatic compensation. The filter comprises a current signal monitoring module, a current signal processing module, a high-speedprocessing module, a pulse width modulation module, a current compensation generator, a monitoring feedback module, a pre-charging module and a protection module; when the filter works, the current signal monitoring module monitors current change in a power system in real time; the current signal processing module processes signals and transmits the processed signals to the high-speed processing module; the high-speed processing module performs harmonic wave and fundamental wave separation on the processed signals and sends an instruction to the pulse width modulation module; the pulse width modulation module performs pulse width modulation processing; the current compensation generator generates compensation current of which the amplitude is equal to the amplitude of harmonic current andof which the polarity is opposite to the polarity of the harmonic current; the compensation current is inputted into a power grid through the monitoring feedback module, the pre-charging module and the protection module, so that harmonic waves can be eliminated; and the monitoring feedback module feeds back the compensation current to the high-speed processing module in real time, so that the high-speed processing module can perform adjustment timely. The automatic compensation filter has the advantages of simple structure, economical performance, high practicality, good use effect and the like.

Description

technical field [0001] The invention relates to the technical field of power equipment, in particular to a filter capable of real-time monitoring and automatic compensation. Background technique [0002] With the progress of society, lighting systems, air conditioning systems, elevators, computers, UPS systems, rectifiers, inverters, frequency converters, frequency conversion motors and other non-linear load equipment are widely used, and the fundamental current is distorted to generate harmonics. When harmonic pollution is serious, it will not only cause economic losses, but also bring many problems, such as high equipment failure rate, reduced equipment service life, low productivity, decreased system security, and some problems that are difficult to find out. To reduce the harm caused by such negative effects, filtering is required in electrical equipment. Through the active dynamic filter, a current with equal amplitude and opposite polarity to the grid harmonic current...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of dynamic harmonics and their adverse effects in power grid operation, and provide a filter capable of real-time monitoring and automatic compensation, through which many problems caused by power harmonics can be actively eliminated in real time. The technical scheme of invention is as follows:

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