Harmonic monitoring system

Abstract

The invention provides a harmonic monitoring system which comprises an intelligent measurement terminal, a communication module, a harmonic detector and a database, wherein the intelligent measurement terminal is in communication connection with the database through the communication module, and the database is used for managing and storing all data interaction of the intelligent measurement terminal. The intelligent measurement terminal comprises a data acquisition module, a transformer area line loss analysis module, a transformer area power supply quality analysis module, a transformer area three-phase imbalance analysis module and a transformer area fault research and judgment module. Through data interation amomg modules of the intelligent measurement terminal, monitoring of power distribution network area power equipment faults caused by harmonic waves in a power distribution network area is achieved, power grid operation and maintenance personnel can take improvement measures in time according to harmonic wave monitoring, and the influence of the harmonic waves on the power distribution network area equipment is reduced. According to the system, the monitoring work efficiency of harmonic waves in the power distribution network area is improved, and stable operation of electric power in the power distribution network area is ensured.

Description

technical field [0001] The invention relates to the technical field of distribution network monitoring, in particular to a harmonic monitoring system. Background technique [0002] Distribution network is an important public infrastructure for national economic and social development. In recent years, my country's distribution network construction investment has continued to increase, and the development of distribution networks has achieved remarkable results. However, the impact of harmonics on precision equipment in distribution networks is huge. For example, the design of electromagnetic induction energy meters is based on the fundamental wave conditions. It is considered that when the load voltage and current are constant, when the frequency changes, the voltage working magnetic flux will change due to the change of the voltage coil impedance, and at the same time, the current magnetic flux will also change due to the change of the turntable impedance. Thus affecting the...

AI Technical Summary

Problems solved by technology

From the basic knowledge of electricians and the working principle of the electric energy meter, it can be known that only the interaction of voltage and current with the same frequency can produce average power, and the electric energy meter can only produce torque and distortion when the interaction between the magnetic flux generated by the voltage and current of the same frequency After the waveform of the waveform passes through the electromagnetic element, because the magnetic flux does not change correspondingly with the waveform, the torque cannot be proportional to the average power and an additional error occurs

[0004] The current harmonic monitoring system generally uses hand-held harmonic detection instruments for monitoring. When analyzing the monitoring data, the monitoring process may cause errors in the monitoring data due to human factors, and the monitoring process requires a lot of effort. Labor force, inaccurate monitoring data in the distribution network station area may lead to the inability to accurately judge whether the equipment in the distribution network is normally measured, if the measurement is inaccurate, it will seriously damage the interests of the power supply system and non-harmonic source users

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