Double-loop household photovoltaic energy storage system and power supply method thereof

A photovoltaic energy storage and dual-circuit technology, which is applied in photovoltaic power generation, current collectors, electric vehicles, etc., can solve problems such as greater impact on the stability of photovoltaic energy storage systems, power outages at the user side, and impacts on normal electricity consumption by users

Pending Publication Date: 2019-11-12
东莞市新瑞能源技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the prior art, the photovoltaic energy storage system is mainly composed of photovoltaic modules, energy storage batteries, inverters, and electrical loads. The photovoltaic modules and energy storage batteries are DC sources, and the mains power is AC sources. The power energy of the three ways of battery and mains power supply is directly supplied to the photovoltaic energy storage integrated inverter. The system causes the operation of the inverter to have a great impact on the stability of the photovoltaic energy storage system. When the inverter fails or shuts down, the AC output end will be disconnected, resulting in a power outage on the user side; and in practical applications, the inverter When the switch switches the three energy sources, problems often occur, seriously affecting the normal power consumption of users

Method used

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  • Double-loop household photovoltaic energy storage system and power supply method thereof

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Experimental program
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Effect test

Embodiment 1

[0031] Such as figure 1 As shown, a dual-circuit household photovoltaic energy storage system includes a mains input line 1, a photovoltaic module 2, an energy storage device 3, an inverter 4, a switching converter 5 and a user end 6, a photovoltaic module 2, a storage The energy devices 3 are all electrically connected to the inverter 4, the inverter 4 is electrically connected to the mains input line 1, the mains input line 1, and the inverter 4 are both electrically connected to the switching converter 5, and the electric energy of the switching converter 5 The output terminal 53 is electrically connected to the user terminal 6 , and the switching converter 5 is used to automatically switch the AC power flowing out from the mains input line 1 and the inverter 4 so as to supply power to multiple user terminals 6 . In operation, 1. When the inverter 4 is working normally, the switching converter 5 connects the inverter 4 and the user terminal 6, and the photovoltaic module 2 ...

Embodiment 2

[0042] Such as figure 1 As shown, a power supply method for a dual-circuit household photovoltaic energy storage system in Embodiment 1 includes the following steps:

[0043] When there is sufficient light, the photovoltaic module 2 generates power, and the inverter 4 converts the direct current output by the photovoltaic into alternating current to supply power to the user terminal 6;

[0044] When the output power of the photovoltaic module 2 is greater than the power consumption of the user end 6, the photovoltaic module 2 stores the excess electricity into the energy storage device 3 through the inverter 4;

[0045] When the light is insufficient, the photovoltaic module 2 stops discharging, and at this time the energy storage device 3 supplies power, and the inverter 4 converts direct current into alternating current to supply power to the user terminal 6;

[0046] When the photovoltaic module 2 and the energy storage device 3 stop supplying power, the inverter 4 switche...

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Abstract

The invention belongs to the technical field of photovoltaic energy storage, in particular to a double-loop household photovoltaic energy storage system. The system comprises a mains supply input line, a photovoltaic module, an energy storage device, an inverter, a switch converter and a user side; the photovoltaic assembly and the energy storage device are electrically connected with the inverter; the inverter is electrically connected with the mains supply input line; the mains supply input line and the inverter are electrically connected with the switch converter; the electric energy outputend of the switch converter is electrically connected with the user end; and the switch converter is used for automatically switching alternating current power supplies flowing out of the mains supply input line and the inverter, thereby facilitating power supply to the multiple user ends. The photovoltaic energy storage system is stable in work, environment-friendly and efficient. In addition, the invention further provides a power supply method of the system, so that the working stability and efficiency of the system are improved.

Description

technical field [0001] The invention belongs to the technical field of photovoltaic energy storage, and in particular relates to a dual-circuit household photovoltaic energy storage system and a power supply method thereof. Background technique [0002] Photovoltaic energy storage system is an inevitable product of the continuous development of the photovoltaic industry. It plays a variety of functions such as load regulation, coordination with new energy storage, line loss compensation, and power compensation in grid-connected or off-grid systems. At present, the household photovoltaic energy storage integrated inverter has three input interfaces: mains input, PV input (photovoltaic input), and DC input (battery input); it has one output interface: AC output, which supplies power to the load side (for power supply for electrical equipment of household or industrial and commercial users). [0003] In the prior art, the photovoltaic energy storage system is mainly composed o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02J7/35H02J9/06
CPCH02J7/35H02J9/062Y02B10/10Y02B10/70Y02E10/56
Inventor 缪李良王吉平
Owner 东莞市新瑞能源技术有限公司
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