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Controller for switching grid connection photovoltaic power generation system and off-grid photovoltaic power generation system

A photovoltaic power generation system and photovoltaic control technology, applied in photovoltaic power generation, electrical components, circuit devices, etc., can solve problems such as limiting the application of off-grid photovoltaic power generation systems, large battery capacity, and inability to solve public grid failures or power outages.

Active Publication Date: 2012-09-26
广东永光新能源设计咨询有限公司
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The grid-connected photovoltaic power generation system is mainly a power generation method attached to the public grid. Since the grid-connected photovoltaic inverter is a current source inverter, the grid-connected photovoltaic power generation system cannot solve the problem of public grid failure or power outage; while the off-grid In photovoltaic power generation systems, energy storage devices (such as batteries) play a role in storing and distributing the electric energy generated by off-grid photovoltaic power generation systems. application

Method used

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  • Controller for switching grid connection photovoltaic power generation system and off-grid photovoltaic power generation system

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Embodiment Construction

[0026] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0027] Such as figure 1 and figure 2 As shown, the present invention provides a controller for switching between grid-connected and off-grid photovoltaic power generation systems, including a detection control device, a main switch and four terminals;

[0028] The four terminals are AC grid terminal 1, photovoltaic power station terminal 2, user load terminal 3 and energy storage device terminal 4; AC grid terminal 1 is connected to the AC grid, photovoltaic power station terminal 2 is connected to the photovoltaic power station, and user load terminal 3 is connected to the user load, and the energy storage device terminal 4 is externally connected to the energy storage device through a bidirectional inverter. In the embodiment of the present invention, the energy storage device is a battery pack, and the photovoltaic power station includes ...

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Abstract

The invention relates to a controller for switching a grid connection photovoltaic power generation system and an off-grid photovoltaic power generation system, which comprises a detection control device, a main switcher and four wiring terminals; the detection control device comprises a logic locking module, and a grid fault detection module, a first photovoltaic control module and a second photovoltaic control module which are respectively connected with the logic locking module; and the logic locking unit is connected with the main switcher, and is used for controlling the main switcher to switch the grid connection photovoltaic power generation system and the off-grid photovoltaic power generation system according to the detection information of the grid fault detection module, the first photovoltaic control module and the second photovoltaic control module. According to the controller for switching the grid connection photovoltaic power generation system and the off-grid photovoltaic power generation system, the logic locking module controls the main switcher to quickly switch a grid connection photovoltaic power generation method or an off-grid photovoltaic power generation method, so that the load of a user or important loads can continue to work uninterruptedly without being affected by the faults of utility power or power-off, and the grid connection photovoltaic power generation system and the off-grid photovoltaic power generation system are effectively integrated.

Description

technical field [0001] The invention relates to a controller for switching between grid-connected and off-grid photovoltaic power generation systems. Background technique [0002] At present, the mainstream photovoltaic power generation application technology has two forms: grid-connected photovoltaic power generation system and off-grid photovoltaic power generation system. The grid-connected photovoltaic power generation system is mainly a power generation method attached to the public grid. Since the grid-connected photovoltaic inverter is a current source inverter, the grid-connected photovoltaic power generation system cannot solve the problem of public grid failure or power outage; while the off-grid In photovoltaic power generation systems, energy storage devices (such as batteries) play a role in storing and distributing the electric energy generated by off-grid photovoltaic power generation systems. application. Contents of the invention [0003] In view of this...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02J9/06
CPCY02B10/72Y02E10/566Y02E10/563Y02B10/70Y02E10/56
Inventor 屈柏耿孙韵琳侯进旺沈辉段春艳章大钧李柏青
Owner 广东永光新能源设计咨询有限公司
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