Photovoltaic power generation unit box transformer substation self-powered device
A photovoltaic power generation and unit box technology, applied in photovoltaic power generation, circuit devices, photovoltaic modules, etc., to improve the reliability of use, reduce maintenance costs, and reduce manual operations.
Pending Publication Date: 2021-05-11
ZHEJIANG ZHENGTAI NEW ENERGY DEV CO LTD
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Problems solved by technology
[0004] At present, the emergency power supply time of the UPS configured in the box is 1h
Method used
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[0017] 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.
[0018] Such as Figure 1-2 as shown, figure 1 A structural schematic diagram of an embodiment of the photovoltaic power generation unit box-type self-consumption device provided by this application; figure 2 It is a schematic diagram of the circuit structure of an embodiment of the UPS power supply delay circuit of the self-consumption device of the box-type photovoltaic power generation unit provided in this application.
[0019] In a specific embodiment, ...
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The invention discloses a photovoltaic power generation unit box transformer substation self-powered device which comprises a QF control power supply unit which is connected with an alternating current bus of the output end of a UPS power supply and used for obtaining power from the UPS power supply after a connected box transformer substation self-powered transformer TC loses power, and further comprises an under-voltage release which is arranged on a UPS power supply incoming line switch 1QF and is used for generating a tripping action to drive the 1QF to be switched off after acquiring that the low-voltage bus voltage of the box transformer substation self-electricity transformer TC is not in voltage, so that the UPS starts to work off line. By changing the connection position of the QF control power supply, the QF control power supply is replaced from the AC bus at the low-voltage side of the self-powered transformer TC to the AC bus section at the output end of the UPS, and when the self-powered transformer TC of the box transformer loses the power supply, the power supply is automatically obtained from the UPS, so that the application reliability of equipment is improved.
Description
technical field [0001] The invention relates to the field of photovoltaic power plant electrical equipment, in particular to a photovoltaic power generation unit box transformer self-consumption device. Background technique [0002] Although with the continuous development of photovoltaic application technology, the efficiency and quantity of photovoltaic power generation are increasing, but due to the size of the battery itself, the output voltage of a single battery is basically stable, and the output is direct current, which needs to be changed to alternating current And pressurized before it can be used. [0003] At present, the on-site step-up box transformer of the power generation unit of the photovoltaic power station generally takes power from the low-voltage side to supply power to the power generation unit’s own load. The box-station measurement and control device belongs to Class I load, and needs to be equipped with a dedicated UPS power supply separately. How...
Claims
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IPC IPC(8): H02J11/00H02J9/06H02S40/30
CPCH02J9/062H02J11/00H02S40/30H02J9/068Y02B10/70Y02E10/56
Inventor 黄兴发李春阳
Owner ZHEJIANG ZHENGTAI NEW ENERGY DEV CO LTD