Harmonic monitoring control system based on multi-source microgrid

A harmonic monitoring and control system technology, applied in the field of micro-grid, can solve problems such as loss of control ability of micro-grid harmonics, unstable operation of power electronic equipment, damage to micro-grid user equipment, etc., to reduce micro-grid losses and improve The effect of service life and ensuring the safety of electricity use

Active Publication Date: 2014-07-30
STATE GRID CORP OF CHINA +1
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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 micr...

Method used

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  • Harmonic monitoring control system based on multi-source microgrid

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Embodiment Construction

[0029] The invention is a harmonic monitoring and control system based on a multi-power supply microgrid. like figure 1 as shown, figure 1 It is a schematic diagram of the system configuration of the present invention. It is mainly composed of a data acquisition module, a data storage analysis module and a harmonic information display control module; the data acquisition module is connected with the data storage analysis module, and the data storage analysis module is connected with the harmonic information display control module.

[0030] The data acquisition module uses a GPS synchronous timing device to provide a unified clock signal to each merging unit.

[0031] The data acquisition module is composed of a voltage and current transformer 7, a merging unit 4, and a GPS synchronous timing device 5; the voltage and current transformer 7 is connected between the 220V bus and the micro power supply branches of the fan 1, photovoltaic 2, and energy storage 3, The merging uni...

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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...

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Application Information

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IPC IPC(8): H02J13/00H02J3/38
CPCY02E10/56Y02E40/70Y04S10/123
Inventor 禹加孙峰朱钰王刚程绪可张钊董鹤楠白雪
Owner STATE GRID CORP OF CHINA
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