Optimizing configuration method for micro-grid filters

An optimized configuration and micro-grid technology, applied in harmonic reduction devices, AC networks to reduce harmonics/ripples, etc., can solve problems affecting power quality, micro-grid control impact, and total harmonics cannot be ignored.

Active Publication Date: 2014-08-06
STATE GRID CORP OF CHINA +3
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Problems solved by technology

Computers, color TVs, various office equipment and household appliances all contain a large number of nonlinear loads. The current of these circuits contains a large number of harmonic components. Inputting into the grid will cause voltage waveform distortion and affect power quality.
Although the equipment capacity of a single user is small, the harmonics generated seem to be very few, but there are often a large number of identical electrical equipment in the microgrid, and the total amount of harmonics generated by them will reach a level that cannot be ignored. Grid control has a big impact

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  • Optimizing configuration method for micro-grid filters
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  • Optimizing configuration method for micro-grid filters

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[0066] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0067] Considering that the coexistence of multiple harmonic sources and loads in the microgrid is becoming more and more prominent, the total amount of harmonics generated by them will reach a level that cannot be ignored, which will have a great impact on the control of the microgrid. In order to deal with the harmonic problem in the microgrid more effectively and reasonably, this patent adopts the method of hierarchical optimization configuration to deal with the optimal configuration problem of the filter device in the microgrid.

[0068] Such as figure 1 , the present invention provides a method for optimizing the configuration of a microgrid filter, the method comprising the following steps:

[0069] Step 1: Establish the microgrid filter optimization configuration objective function;

[0070] Step 2: Determine the optimal configuration constraints of...

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Abstract

The invention provides an optimizing configuration method for micro-grid filters. The method comprises the following steps of setting up optimizing configuration objective functions of the micro-grid filters, determining optimizing configuration constraint conditions of the micro-grid filters, and adopting a self-adaptation genetic algorithm and a differential evolution algorithm to adapt to carry out optimizing configuration on the micro-grid filters. The method can be used for optimizing the installation position, the installation type, the installation class number and the parameter of the passive and active filters in a whole micro-grid operating with harmonic wave source loads; on the premise that harmonic wave currents meet the constraint conditions and the filters operate safely, the total investment cost of the filters can be reduced, and the harmonic waves can be effectively restrained.

Description

technical field [0001] The invention relates to an optimal configuration method, in particular to an optimal configuration method for a microgrid filter. Background technique [0002] The possible sources of harmonics in the microgrid mainly include: harmonics generated by nonlinear loads in the microgrid, harmonics generated by the power electronic interface of the micropower source, and harmonic penetration of the distribution network. [0003] The load of the microgrid is mainly low-voltage electrical equipment. These low-voltage electrical equipment are mostly equipped with phase control circuits or rectification circuits. The current contains high harmonic components. This type of load has a small capacity but a large number and relatively concentrated. The impact cannot be ignored. Photovoltaic cells, fuel cells, and micro gas turbines are commonly used micro power sources in micro grids. They generally need to be converted into alternating current through power conve...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/01
CPCY02E40/40
Inventor 吕志鹏盛万兴刘海涛李蕊刘岚吴鸣俞勤政唐亚迪徐永海陶顺
Owner STATE GRID CORP OF CHINA
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