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Control method and device for photovoltaic microgrid system

A control method and technology of a control device, which are applied in photovoltaic modules, photovoltaic power stations, photovoltaic power generation and other directions to achieve the effect of simple system structure and control method and smooth output

Active Publication Date: 2016-11-23
BYD CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method overcomes the problem that the output power of photovoltaic DC / AC is greatly affected by the external environment through the charging and discharging function of the energy storage battery in the photovoltaic microgrid system, and the system structure and control method are relatively simple

Method used

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  • Control method and device for photovoltaic microgrid system
  • Control method and device for photovoltaic microgrid system
  • Control method and device for photovoltaic microgrid system

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Embodiment Construction

[0019] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0020] The method and device for controlling a photovoltaic microgrid system according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0021] It should be noted that, in the present invention, the photovoltaic microgrid system may include an energy storage battery, a photovoltaic DC chopper DC / DC, and a photovoltaic DC / AC inverter DC / AC. Among them, such as figure 1 As shown, the output busbar of the energy storage battery can be used as the DC busbar of the photov...

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Abstract

The invention discloses a control method and a control device for a photovoltaic microgrid system. The photovoltaic microgrid system comprises an energy storage battery, a photovoltaic DC / DC device and a photovoltaic DC / AC device. The control method comprises the steps of: detecting output power of the photovoltaic DC / DC device, and detecting SOC of the energy storage battery; controlling the photovoltaic DC / AC device to output at target power in each period regularly when detecting that the output power of the photovoltaic DC / DC device changes; and limiting the target power of the photovoltaic DC / AC device in each period according to the SOC of the energy storage battery during the process of controlling the photovoltaic DC / AC device to output at the target power in each period, and controlling the photovoltaic DC / AC device to output at limited target power in each period. The control method overcomes the problem that output power of the photovoltaic DC / AC device is greatly influenced by the external environment by means of charging and discharging functions of the energy storage battery in the photovoltaic microgrid system, and the system structure and the control mode are relatively simple.

Description

technical field [0001] The invention relates to the field of photovoltaic microgrid systems in power electronics, in particular to a control method and device for a photovoltaic microgrid system. Background technique [0002] With the growth of population and the improvement of living standards, all kinds of mineral energy are rapidly exhausted, and the air pollution and ecological environment crisis caused by the use of fossil energy are becoming more and more serious. In order to reduce air pollution, protect the ecological environment, ensure long-term stable supply of energy, gradually change the existing energy structure, and vigorously develop green energy has become the consensus of all countries. Solar energy has become the most promising green energy due to its cleanness, high efficiency, and inexhaustibility. However, solar energy also has its defects. For example, the power generation capacity is greatly affected by climate and environment, and stable power output...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02S10/20
CPCY02E10/56Y02E70/30
Inventor 杨荣春孙嘉品尹韶文
Owner BYD CO LTD
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