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Photovoltaic energy storage system and control method thereof

A photovoltaic energy storage and control method technology, applied in the field of photovoltaic energy storage system and its control, can solve the problems of unsuitable photovoltaic energy storage systems and indistinguishable inverters

Pending Publication Date: 2022-07-29
DELTA ELECTRONICS (SHANGHAI) CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method is not suitable for photovoltaic energy storage systems, because this phenomenon is consistent with normal on-off grid switching, and the inverter cannot distinguish

Method used

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  • Photovoltaic energy storage system and control method thereof
  • Photovoltaic energy storage system and control method thereof
  • Photovoltaic energy storage system and control method thereof

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Embodiment Construction

[0044] Some typical embodiments that embody the features and advantages of the present disclosure will be described in detail in the description that follows. It should be understood that the present disclosure is capable of various changes in different embodiments without departing from the scope of the present disclosure, and the descriptions and drawings therein are for illustrative purposes only and not for limitation. this disclosure.

[0045] figure 1 It is a schematic diagram of a circuit structure of a photovoltaic energy storage system according to an embodiment of the present invention. figure 2 Shows figure 1 A detailed circuit diagram of an exemplary embodiment of an inverter in a photovoltaic energy storage system. Please refer to figure 1 , In this embodiment, the photovoltaic energy storage system includes a photovoltaic array assembly 101 , an energy storage unit 102 (eg, a battery unit), an inverter 103 and a fast turn-off switch 104 . The inverter 103 i...

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Abstract

The invention provides a photovoltaic energy storage system and a control method thereof. The photovoltaic energy storage system comprises an energy storage unit, a photovoltaic array assembly, an inverter and a quick turn-off switch. The inverter is electrically coupled to the energy storage unit and the photovoltaic array assembly. The fast turn-off switch is electrically coupled to the inverter, the power grid and the load. The inverter further comprises a detection control circuit which is used for detecting at least two of the first voltage, the second voltage and the third voltage of the alternating current side of the inverter and judging whether the quick turn-off switch is turned off or not according to the detected at least two voltages and a preset reference value. Compared with the prior art, under the condition that extra hardware is not added, whether an emergency situation occurs or not can be accurately judged only through the detection control circuit in the inverter, and connection between the inverter and the photovoltaic array assembly and connection between the inverter and the energy storage unit can be timely disconnected when the emergency situation occurs.

Description

technical field [0001] The present disclosure relates to a photovoltaic energy storage system, and in particular, to a photovoltaic energy storage system capable of disconnecting the connection between the inverter and the energy storage unit (such as a battery) and the connection between the inverter and the photovoltaic array assembly in the event of an emergency and its control method. Background technique [0002] In the photovoltaic energy storage integrated household system, the standard requires that in an emergency, such as a fire, the system should cut off the electrical connection between the photovoltaic array components and the inverter, and between the battery and the inverter in time, so as to ensure Safety. The traditional pure photovoltaic system uses the inverter to send a shutdown command to the fast shutdown device, and the fast shutdown device disconnects the electrical connections between the photovoltaic array components and between the photovoltaic ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00H02J3/38
CPCH02J3/001H02J3/381H02J2300/24H02J7/35H02J3/32H02J7/00712
Inventor 邱纪星陈申徐飞冬
Owner DELTA ELECTRONICS (SHANGHAI) CO LTD
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