Voltage control method, photovoltaic power supply device and photovoltaic power supply system

A voltage control method and photovoltaic power supply technology, which are applied in battery circuit devices, photovoltaic power generation, circuit devices, etc., can solve the problems of photovoltaic power supply devices unable to output electric energy and photovoltaic energy waste.

Active Publication Date: 2020-04-24
CHINA UNITED NETWORK COMM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When the DC power supply device is in the equal charge state, the DC bus voltage changes in real time, and the output voltage of the photovoltaic power supply device is generally output in a static output mode. Therefore, when the DC bus voltage becomes larger, the output voltage of the photovoltaic power supply device may be lower than the DC The bus voltage causes the power of the photovoltaic power supply device to fail to output, resulting in waste of photovoltaic energy

Method used

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  • Voltage control method, photovoltaic power supply device and photovoltaic power supply system
  • Voltage control method, photovoltaic power supply device and photovoltaic power supply system
  • Voltage control method, photovoltaic power supply device and photovoltaic power supply system

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Embodiment Construction

[0015] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0016] It should be noted that, in the embodiments of the present invention, words such as "exemplary" or "for example" are used for example, illustration or illustration. Any embodiment or design solution described as "exemplary" or "for example" in the embodiments of the present invention shall not be construed as being more preferred or more advantageous than other embodiments or design solutions. Rather, the use of words such as "exemplary" or "such as" is...

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Abstract

The embodiment of the invention provides a voltage control method, a photovoltaic power supply device and a photovoltaic power supply system, and relates to the field of new energy. The method is usedfor improving the energy utilization rate of the photovoltaic power supply system. The method comprises the following steps: the photovoltaic power supply device obtains first system parameters, wherein the first system parameters comprise an output voltage of the photovoltaic power supply device and a direct current bus voltage; the photovoltaic power supply device determines the charging stateof the direct-current power supply device according to the direct-current bus voltage, wherein the charging state comprises current-limiting charging and voltage-limiting charging; and the photovoltaic power supply device adjusts the output voltage according to the DC bus voltage and the charging state. The method is used for dynamically adjusting the output voltage of the photovoltaic power supply device.

Description

technical field [0001] The invention relates to the field of new energy, in particular to a voltage control method, a photovoltaic power supply device and a system. Background technique [0002] The current photovoltaic power supply system includes a photovoltaic power supply device, a DC power supply device and a DC bus connected thereto. The photovoltaic power supply device and the DC power supply device usually provide time-sharing power supply. According to the charge and discharge state of the battery pack in the photovoltaic power supply system, the operating state of the DC power supply device may include a floating charge state, a discharge state and an equal charge state. When the DC power supply device is in the state of equal charging, the DC bus voltage changes in real time, and the output voltage of the photovoltaic power supply device is generally output in a static output mode. Therefore, when the DC bus voltage becomes larger, the output voltage of the photov...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00H02J7/35
CPCH02J7/0029H02J7/35Y02E10/56
Inventor 赵国瑞侯永涛王殿魁
Owner CHINA UNITED NETWORK COMM GRP CO LTD
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