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Energy management device for photovoltaic grid-connected power generation system

An energy management device and grid-connected power generation technology, applied in photovoltaic power generation, circuit devices, battery circuit devices, etc., to achieve the effect of reducing power consumption costs and reducing electricity purchases

Active Publication Date: 2017-11-07
EATON PHOENIXTEC MMPL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the photovoltaic grid-connected power generation system in the prior art does not have this function

Method used

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  • Energy management device for photovoltaic grid-connected power generation system
  • Energy management device for photovoltaic grid-connected power generation system
  • Energy management device for photovoltaic grid-connected power generation system

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Embodiment Construction

[0025] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0026] figure 2 It is a block diagram of an energy management device for a photovoltaic grid-connected power generation system according to the first embodiment of the present invention. Such as figure 2 As shown, the energy management device 20 includes a first power measurement device 23 and a second power measurement device 24 respectively connected to the input end and the output end of the grid-connected inverter 12 . The first power measuring device 23 is used to measure the output power of the photovoltaic cell 11, and the second power measuring device 24 is used to measure the power consumption (purchased power) or grid-connected power (sold power) of the photovoltaic grid-connected power generation system. The energy manag...

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Abstract

The invention provides an energy management device for a photovoltaic grid-connected power generation system. The photovoltaic grid-connected power generation system comprises a photovoltaic battery and a grid-connected inverter. The photovoltaic battery is connected with a power grid through the grid-connected inverter. The energy management device comprises a rechargeable battery and a bidirectional DC-DC converter, wherein the rechargeable battery is connected with the input end of the grid-connected inverter through the bidirectional DC-DC converter; a first power measuring device which is used for measuring the output power of the photovoltaic battery; a second power measuring device which is used for measuring the power consumption power or grid-connected power of the photovoltaic grid-connected power generation system; and a converter controller which is used for controlling the bidirectional DC-DC converter for managing the capacity of the rechargeable battery. The energy management device provided by the invention reduces power consumption cost of the user.

Description

technical field [0001] The invention relates to the field of photovoltaic power generation, in particular to an energy management device for a photovoltaic grid-connected power generation system. Background technique [0002] Photovoltaic grid-connected power generation system is a power generation system that directly converts solar radiation energy into electrical energy based on the photovoltaic effect. It is mainly composed of a photovoltaic cell and a grid-connected inverter. The photovoltaic cell converts solar energy into DC power, and the DC power is converted into AC power with the same frequency and phase as the grid through the grid-connected inverter, and then directly supplies power to the AC load or feeds into it. power grid. The photovoltaic grid-connected power generation system is connected to the grid and jointly undertakes the power supply task. [0003] figure 1 It is a block diagram of a photovoltaic grid-connected power generation system in the prior...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02J7/35H02J9/06
CPCH02J3/383H02J7/35H02J9/061H02J9/068H02J3/46H02J3/06H02J3/38Y02E10/56Y04S20/20Y02B70/30
Inventor 黄皓杰蔡佳翰
Owner EATON PHOENIXTEC MMPL CO LTD
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