MPPT combiner box with tracking function, and control method using same

Abstract

The invention relates to a MPPT combiner box with a tracking function. The MPPT combiner box comprises a master control board, a power supply module, a DC bus, a motor driving module and a communication module. The power supply module is connected with a photovoltaic panel and an inverter, communicates with the master control board, and includes at least one power converter and the DC bus connected to the power converter. The master control board communicates with the photovoltaic panel to carry out the maximum power point tracking control. A data recorder communicates with the inverter. The master control board communicates with the inverter via the communication module and outputs a control signal to a driving motor. The motor driving module communicates with the master control board. The driving motor is connected with the DC bus and communicates with the motor driving module. The motor driving module controls the driving motor to operate according to the control signal. The invention realizes the integration of a photovoltaic support tracking system and the MPPT combiner box, fully realizes the maximum equipment integration, improves the stability of the system, and reduces thecost of construction and operation and maintenance.

Description

technical field [0001] The invention belongs to the field of solar photovoltaic power generation, and relates to an MPPT combiner box with a tracking function. Background technique [0002] In the existing solar photovoltaic power generation system, the MPPT combiner box and the sun tracking controller are two independent concepts and systems. The main component of the MPPT combiner box is the MPPT controller. The MPPT controller is usually based on the BOOST hardware circuit. It adopts the control structure of the current inner loop and the voltage outer loop and the algorithm of three-point power prediction, and realizes the maximum photovoltaic conversion through the voltage and current regulator. Devices for power point tracking. The sun tracker is a component that tracks the position of the sun according to a certain rule by controlling the tracking bracket to improve the overall power generation of the system. [0003] In the traditional tracking photovoltaic power s...

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Problems solved by technology

[0004] At present, there have been some tracking controller and confluence system integrated devices, such as a tracking control and inverter confluence integrated device disclosed in the invention patent with application number 201510990264.0, but these existing devices only realize two Two independent systems share the physical channels of power supply and communication and place them in the same box, which is not true equipment integration and system integration, so there are still problems of insufficient integration and integration and high cost

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