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Microgrid power quality treatment method and device

A technology of power quality and microgrid, applied in the field of microgrid, can solve the problems of microgrid power quality pollution and weak ability to absorb power quality pollution

Active Publication Date: 2020-04-03
QINHUANGDAO POWER SUPPLY COMPANY OF STATE GRID JIBEI ELECTRIC POWER COMPANY +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, as distributed power sources, power electronic equipment and nonlinear loads are randomly connected to the microgrid, the power quality pollution of the microgrid is becoming more and more serious. Trouble with quality pollution

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  • Microgrid power quality treatment method and device
  • Microgrid power quality treatment method and device
  • Microgrid power quality treatment method and device

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Embodiment Construction

[0067] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative work all belong to the protection scope of the present invention.

[0068]In this application, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes none. other elements specifically listed, or also include elements inherent in such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase...

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Abstract

The invention provides a microgrid power quality treatment method and device, and the method comprises the steps: considering the power quality treatment benefit, setting an objective function as theminimum microgrid operation cost, and building an economical active optimization model as an upper optimization model; considering that the objective function is the minimum node voltage deviation andthe minimum node harmonic voltage distortion rate of the microgrid, and taking the power quality management optimization model for managing the node voltage deviation and the harmonic distortion rateas a lower-layer optimization model; and calculating and reasonably distributing the capacity of the grid-connected inverter by utilizing the upper-layer optimization model and the lower-layer optimization model, so that grid connection of the grid-connected inverter according to power requirements is realized, and meanwhile, electric energy pollution of grid-connected nodes can be effectively treated by utilizing the residual capacity of the grid-connected inverter.

Description

technical field [0001] The invention relates to the technical field of micro-grids, in particular to a method and device for controlling power quality of micro-grids. Background technique [0002] With the continuous development of science and technology, the microgrid has gradually become an important supplementary role in the power supply of the large power grid. As a small-scale power generation and distribution system, the microgrid can solve the problem of difficult power supply in some remote areas that are difficult to connect to the large power grid, and the microgrid conforms to the direction of electricity reform, which can expand a huge space for the development of new energy. [0003] However, as distributed power sources, power electronic equipment and nonlinear loads are randomly connected to the microgrid, the power quality pollution of the microgrid is becoming more and more serious. The problem of quality pollution. At this stage, there is an urgent need f...

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Application Information

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IPC IPC(8): H02J3/48
CPCH02J3/48
Inventor 张孟琛贾清泉王珺
Owner QINHUANGDAO POWER SUPPLY COMPANY OF STATE GRID JIBEI ELECTRIC POWER COMPANY
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