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Storage medium, photovoltaic power generation system and control method thereof

A photovoltaic power generation system and controller technology, applied in photovoltaic power generation, energy storage, greenhouse gas reduction, etc., can solve problems such as power instability and large impact on the power grid

Pending Publication Date: 2021-06-18
BYD CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Embodiments of the present invention provide a storage medium, a photovoltaic power generation system and a control method thereof, so as to solve the problem that the output power of the current photovoltaic power generation system is very unstable and has a great impact on the power grid

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  • Storage medium, photovoltaic power generation system and control method thereof
  • Storage medium, photovoltaic power generation system and control method thereof
  • Storage medium, photovoltaic power generation system and control method thereof

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Embodiment Construction

[0023] In order to make the above objects, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] It will be appreciated that the specific embodiments described herein are intended to explain the present invention, and is merely the embodiments of the invention, and not all embodiments are not intended to limit the invention.

[0025] Refer figure 1 , figure 1 A photovoltaic power generation system provided by the embodiment of the present invention, which includes:

[0026] The photovoltaic panel is connected to the DC side of the photovoltaic inverter, respectively, for converting solar energy into electrical energy output;

[0027] The energy storage module, the energy storage module includes at least two DCDC converters, and a battery connected to the low voltage side of each DCDC converter, each DCDC converter is connected between the DC s...

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Abstract

The embodiment of the invention provides a storage medium, a photovoltaic power generation system and a control method thereof. The photovoltaic power generation system comprises a photovoltaic panel, an energy storage module, a photovoltaic inverter and a controller. The controller is used for controlling a main DCDC converter in at least two DCDC converters to work in a constant low-voltage mode under the condition that starting of the photovoltaic inverter is completed so as to start a battery connected with the low-voltage side of each DCDC converter, and under the condition that battery starting is finished, controlling at least one DCDC converter except the main DCDC converter to work in a constant power mode, controlling the main DCDC converter to stop, and controlling the sum of the output power of all DCDC converters according to the output power of the photovoltaic panel, the current input power of the photovoltaic inverter and the rated power of the photovoltaic inverter, so that when the main DCDC converter is not switched to the constant power mode, the input power of the photovoltaic inverter can be adjusted through the other DCDC converters, and the stability of the input power of the photovoltaic inverter is improved.

Description

Technical field [0001] The present invention relates to the field of photovoltaic power generation, and more particularly to a storage medium, a photovoltaic power generation system, and a control method thereof. Background technique [0002] Solar energy is a green energy, an inexhaustible clean energy. However, the photovoltaic power generation is influential and temperature, and when the external environment changes, the photovoltaic power of the photovoltaic panel will change rapidly, and severely affect the power supply quality of the AC power grid, resulting in the power grid company to the photovoltaic power generation. [0003] Since the currently constructing a large photovoltaic power generation system contains only photovoltaic panels and inverters, photovoltaic power is input to the inverter, and the inverter is input to the grid. However, when the light intensity is relatively high, the photovoltaic power is large, so that the power input to the grid is large, when t...

Claims

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Application Information

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IPC IPC(8): H02J3/32H02J3/38
CPCH02J3/32Y02E70/30Y02E10/56
Inventor 景剑飞孙嘉品
Owner BYD CO LTD
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