Micro-grid power quality control method

A control method and power quality technology, which is applied in flexible AC transmission system, single-network parallel feeding arrangement, multi-phase network asymmetry reduction, etc., can solve the problem of reducing equipment life, failure to work normally, power grid voltage, current distortion, etc. question

Inactive Publication Date: 2016-04-20
LUOHE POWER SUPPLY OF HENAN ELECTRIC POWER CORP
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Problems solved by technology

On the other hand, in order to improve the performance of production equipment and expand the use of equipment, a large number of different types of power electronic devices are used in the microgrid. These power electronic devices often distort the voltage and current of the grid, which in turn affec

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[0069] Such as Figure 1-3 As shown, a microgrid power quality control method, wherein the power quality control method includes control of power fluctuations, compensation of reactive power, compensation of three-phase unbalanced current, and compensation of harmonics.

[0070] When multiple micro power supplies in a micro grid work in parallel, when power fluctuations occur, if a micro power supply exceeds its power upper limit output, the droop characteristic of the micro power supply that exceeds the limit needs to be converted to a vertical characteristic, that is, the power output is maintained at the maximum Power, and the angular frequency continues to decrease; while other micro power sources that have not reached the upper limit of the output continue to increase the active power until the system reaches a new balance.

[0071] When the microgrid system is running, according to the droop characteristics of the micropower supply, set the angular frequency to drop to ω 1 Wh...

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Abstract

When the power of a micro-grid fluctuates, the angular frequency of the power can be adjustment to make the micro-grid to meet the load requirement, a TCR can be adjusted to compensate the reactive and three-phase imbalance in a micro-grid system, an active wave recorder is used for compensating harmonic waves in a micro-grid system, and thus stable and efficient operation of the micro-grid is ensured.

Description

technical field [0001] The invention relates to the technical field of power quality management of a distributed power generation source, in particular to a method for controlling the power quality of a microgrid. Background technique [0002] With the development of technology, the proportion of electrical equipment based on computer microprocessors in the electrical load is gradually increasing. These precision equipment generally have high power quality requirements. On the other hand, in order to improve the performance of production equipment and expand the use of equipment, a large number of different types of power electronic devices are used in the microgrid. These power electronic devices often distort the voltage and current of the grid, which in turn affects the microgrid equipment. In particular, the normal operation of precision equipment may even fail to work normally in severe cases, which may also reduce the life of these equipment and increase network loss. ...

Claims

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Application Information

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IPC IPC(8): H02J3/38H02J3/24H02J3/18H02J3/26H02J3/01
CPCY02E40/10Y02E40/40Y02E40/50
Inventor 李启林陈立营刘保军吕洋程维欣马永泽史二飞
Owner LUOHE POWER SUPPLY OF HENAN ELECTRIC POWER CORP
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