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Photovoltaic power generation system control method and device, power optimizer and storage medium

A photovoltaic power generation system and power optimizer technology, which is applied in photovoltaic power generation, circuit devices, control/regulation systems, etc., and can solve problems such as mismatch oscillations

Pending Publication Date: 2021-09-28
江苏领充创享新能源科技有限公司
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Problems solved by technology

[0004] However, in the existing photovoltaic power generation system, only the case where the MPPT function is performed by a certain module in the "power optimizer" or "photovoltaic inverter", but when the "photovoltaic inverter" performs MPPT tracking, the "power When the "optimizer" DC / DC also performs MPPT tracking at the same time, there are two MPPT DC / DC units in the entire system, and the DC / DC units of these two MPPT levels are trying to find the maximum power point through the disturbance strategy, and then will As a result, there may be a certain degree of competition between the two MPPTs, and there may even be mismatch shocks

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[0069] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. It should be understood that the appended The figures are only for the purpose of illustration and description, and are not used to limit the protection scope of the present application. Additionally, it should be understood that the schematic drawings are not drawn to scale. The flowcharts used in this application illustrate operations implemented in accordance with some embodiments of the application. It should be understood that the operations of the flowcharts may be performed out of order, and steps that have no logical context may be performed in reverse order or concurrently. In addition, those skilled in the art may add one or more other operations t...

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Abstract

The invention provides a photovoltaic power generation system control method and device, a power optimizer and a storage medium, and relates to the technical field of power electronics. The method comprises the following steps of: acquiring an input current and an input voltage of a power optimizer; obtaining actual input power according to the input voltage and the input current; obtaining output power according to the actual input power and a pre-generated first mapping curve which is used for indicating the corresponding relation between the output voltage and the output power of the power optimizer, and comprises a first voltage section linear power curve and a second voltage section linear power curve, the voltage corresponding to a second voltage section being higher than the voltage corresponding to a first voltage section; and outputting the bus voltage corresponding to the output power to a post-stage photovoltaic inverter, so as to make the post-stage photovoltaic inverter determine the target maximum power according to the bus voltage. According to the photovoltaic power generation system control method and device, the power optimizer and the storage medium, the competitive relationship between the power optimizer and the photovoltaic inverter can be effectively balanced, and mismatch oscillation is avoided.

Description

technical field [0001] The present application relates to the technical field of power electronics, in particular, to a photovoltaic power generation system control method, device, power optimizer and storage medium. Background technique [0002] Photovoltaic power generation is a technology that directly converts light energy into electrical energy by using the photovoltaic effect at the semiconductor interface. It is mainly composed of photovoltaic panels (components), controllers and inverters, and the main components are composed of electronic components. The solar cells are packaged and protected after being connected in series to form a large-area solar cell module, and then cooperate with power controllers and other components to form a photovoltaic power generation device. [0003] At present, in photovoltaic power generation systems, there are centralized and distributed systems. Among them, in the centralized photovoltaic system, the photovoltaic panels are gener...

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Application Information

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IPC IPC(8): H02J3/38G05F1/67G05F3/24
CPCH02J3/381G05F1/67G05F3/24H02J2300/24Y02E10/56H02J2300/26
Inventor 卫建荣范杨平赵武生付勇吕剑
Owner 江苏领充创享新能源科技有限公司
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