Harmonic monitoring control system based on multi-source microgrid

Abstract

The invention belongs to the technical field of a microgrid, relates to a harmonic monitoring control system based on a multi-source microgrid, in particular to wind power, photovoltaic and energy storage devices, and provides a microgrid harmonic monitoring control system based on data collection and analysis technologies. The system is mainly composed of a data collection module, a data storage and analysis module and a harmonic information display and control module. The data collection module is connected with the data storage and analysis module, and the data storage and analysis module is connected with the harmonic information display and control module. According to the system, the characteristic of independent distribution of a microgrid harmonic source can be fully used, the harmonic current level in the microgrid is effectively controlled, power supply quality of a microgrid user is improved, damage of harmonics to sensitive devices in the microgrid is reduced, the service life of the devices is prolonged, quality of power output by the microgrid is guaranteed, and grid-connected power generation benefits are improved. The system has good application prospects in a microgrid project containing multiple power electronic devices.

Description

technical field [0001] The invention belongs to the technical field of micro-grids, in particular to a harmonic monitoring and control system based on multi-power source micro-grids. Specifically, it involves wind power, photovoltaic and energy storage devices. It is a micro-grid harmonic monitoring and control system based on data acquisition and analysis technology. Background technique [0002] In recent years, as the global energy crisis and environmental pollution problems have become increasingly prominent, actively accepting renewable clean energy and promoting the development of energy-saving and environmental protection industries have become the main ways for countries around the world to effectively respond to environmental and resource crises. With the rapid development of wind power technology, photovoltaic technology and energy storage technology, micro-grid has become an important part of the clean energy field. Different countries are actively carrying out re...

AI Technical Summary

Problems solved by technology

[0003] The primary problem of connecting a microgrid to a large power grid is power quality, and the power electronic equipment used in a large number of microgrids is likely to cause harmonic problems

Microgrids whose harmonics exceed the standard are not allowed to be connected to the large power grid. At the same time, excessive harmonics will also cause damage to microgrid user equipment and unstable operation of power electronic equipment

Although the microgrid has installed filtering devices at present, when the filtering device fails or the operating environment of the operating microgrid changes, the harmonic problem of the microgrid will lose control ability, resulting in the microgrid not being able to operate normally for a long time

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