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A power control method for a photovoltaic system and a photovoltaic system applying the method

A photovoltaic system and power control technology, applied in the field of photovoltaic systems, can solve the problems that the power of photovoltaic modules, photovoltaic inverters and energy storage converters cannot be used with maximum efficiency, the power is difficult to schedule, and the control delay is high, so as to achieve accurate and timely Control effect, low delay, small communication interference effect

Active Publication Date: 2021-11-12
厦门科华数能科技有限公司
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Problems solved by technology

[0006] However, since photovoltaic inverters and energy storage converters are usually produced by different manufacturers, communication problems between them make it difficult to dispatch the power of photovoltaic inverters and energy storage converters, and the control delay is high, which makes energy storage components Charging, can not maximize the efficiency of the energy converted by photovoltaic modules

Method used

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  • A power control method for a photovoltaic system and a photovoltaic system applying the method
  • A power control method for a photovoltaic system and a photovoltaic system applying the method

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Embodiment Construction

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are preferred embodiments of the invention and should not be seen as excluding other embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0032] refer to figure 1 , which shows the main structure of the photovoltaic system of the embodiment of the present invention. The photovoltaic modules are connected to the photovoltaic inverter to form a photovoltaic pathway. The energy storage component is sequentially connected to the bidirectional front-end circuit and the energy storage converter to form an energy storage path. The photovoltaic path and the inverter end of the energ...

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Abstract

The invention discloses a power control method of a photovoltaic system and a photovoltaic system applying the method. The method includes: the energy storage converter samples the bus voltage V of its DC side, and increases the output when it is higher than the first threshold Frequency f, to synchronously increase the system operating frequency f'; the photovoltaic inverter reduces the output power P when the system operating frequency f' increases pv , so that the output power of the photovoltaic inverter P pv Balanced with the output power P of the energy storage converter es and load power consumption P load Sum. The photovoltaic system and method provided by the present invention coordinate the overall power distribution of the system by realizing wireless communication between the photovoltaic inverter and the energy storage converter, and have the advantages of fast response, low communication delay and stable operation.

Description

technical field [0001] The invention relates to the technical field of photovoltaic power generation grid connection and energy storage, in particular to a power control method of a photovoltaic system and a photovoltaic system applying the method. Background technique [0002] The photovoltaic (power generation) system is mainly composed of photovoltaic modules and photovoltaic inverters. The photovoltaic modules convert solar energy into electrical energy and then convert it into alternating current through the photovoltaic inverter for grid connection and load. [0003] Since photovoltaic modules can provide more energy during the day than at night, and the power grid usually has limited power generation, in order to make full use of the converted solar energy of the photovoltaic system, so that it can be better coupled with the grid, usually in the photovoltaic system Introduce energy storage components such as batteries, and cooperate with energy storage converters to s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/38H02J3/32H02J13/00
CPCH02J3/32Y02E70/30Y02E10/56Y04S10/14Y04S40/126Y04S10/123Y02E40/70Y02E60/00
Inventor 许林毅许汉林马俊
Owner 厦门科华数能科技有限公司
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