Current control method and control system

A current control and current technology, applied in electrical components, circuit devices, photovoltaic power generation and other directions, can solve problems such as large current impact of photovoltaic modules, and achieve the effect of solving high voltage and large current impact, reducing power consumption, and improving safety factor.

Pending Publication Date: 2022-08-05
CHANGSHA JINGHUI SOLAR ENERGY CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For this reason, the present invention proposes a current control method, which solves the problem of large current impact during the shutdown process of photovoltaic modules

Method used

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  • Current control method and control system
  • Current control method and control system
  • Current control method and control system

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Embodiment Construction

[0034] The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, only used to explain the present invention, and should not be construed as a limitation of the present invention.

[0035] In the description of the present invention, it should be understood that the related orientation description, such as the orientation indicated by up, down, front, rear, left, right, etc., is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying The device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed...

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Abstract

The invention discloses a current control method and system, and the method comprises the steps: building the communication connection between a communication collection unit and a main control unit, and between the communication collection unit and a server, and connecting the main control unit with a photovoltaic module; the output end of the photovoltaic module is connected in series with a main control switch; connecting the main control switch in parallel with an auxiliary control switch, and enabling the auxiliary control switch to be in an off state; the driving ends of the main control switch and the auxiliary control switch are respectively connected with the main control unit; the main control unit firstly controls the auxiliary control switch to be switched on, so that the main control switch is in a short-circuited state; and the main control unit controls the main control switch to be switched off, and after the main control switch is switched off, the main control unit controls the auxiliary control switch to be switched off. The impact of large current is effectively solved through the auxiliary control switch, the risk of arc discharge when the main control switch is switched off is eliminated, and the sizes of the main control switch and the auxiliary control switch are greatly reduced. In addition, the main control switch is in a normally-closed state, so that power consumption is effectively reduced, and cost is saved.

Description

technical field [0001] The invention belongs to the field of photovoltaic power generation, and in particular relates to a current control method and a control system. Background technique [0002] In recent years, with the rapid development of the photovoltaic industry, photovoltaic power generation will rapidly replace chemical energy as the main energy source. However, in a power generation system with photovoltaic modules, when a fault, a short circuit needs to be repaired, or an emergency such as a fire occurs, it is necessary to realize the high-voltage DC shutdown of the photovoltaic module level. During the shutdown process, it is necessary to overcome the large If the problem of current and high voltage cannot be overcome, it will cause serious damage to equipment, maintenance personnel or firefighters, and will hinder the development and industrialization of photovoltaic power generation technology in my country. At the same time, solving the problem of high operat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/20H02H5/04H02H3/00
CPCH02H7/20H02H5/04H02H3/00Y02E10/56
Inventor 彭宏亮彭鹏潘新辉
Owner CHANGSHA JINGHUI SOLAR ENERGY CO LTD
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