Dynamic interconnected control system and control method for solar battery pack

Abstract

The invention provides a dynamic interconnected control system and a control method for a solar battery pack, which comprises a plurality of MOS switch units, a connection terminal array and a control unit, wherein MOS switches are connected in series to form an array; each electric node of the MOS switch array is connected with a corresponding node of the connection terminal; the MOS switches are electrically connected with a control unit; and the control unit controls switch-on / switch-off of the MOS switches according to the state of the solar battery unit connected with the connection terminal array. The method comprises the following steps of: connecting a plurality of MOS switch units in series; connecting each solar battery unit and an MOS switch in parallel and electrically connecting the solar battery unit and the control unit; using the control unit to monitor the state of each solar battery unit and controlling the switch-on / switch-off of the MOS switches according to the state of the solar battery unit. The dynamic interconnected control system and the control method for the solar battery pack provided by the invention solve the problem that the entire system is affected when a single solar battery unit fails by using a very simple circuit structure.

Description

technical field [0001] The invention relates to a dynamic interconnection control system and control method for solar cell groups. Background technique [0002] The voltage generated by a single solar cell is between 0.8-1.6v. Therefore, in order to realize the output of high voltage and high current, it is necessary to adopt multiple complex topological structures connected in series and in parallel. However, in multiple series and parallel structures, when a single cell is damaged or in a shaded state, it is equivalent to a pn junction with a very high internal resistance connected in series in the circuit, making the entire solar cell group in a mismatch state, and the internal resistance is greatly increased. The increase makes it impossible to output the rated current. At this time, although most of the battery cells are in the power generation state, due to the existence of high internal resistance cells, the output current of the entire series branch will be reduced...

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Problems solved by technology

[0004] In view of the defects and deficiencies in the prior art, the purpose of the present invention is to propose a solar cell group dynamic interconnection control system and control method, which can solve the problems caused by the simple series and parallel structure of the solar cell group in the prior art. When the unit is damaged or shaded, the output current of the entire solar cell array is reduced, resulting in low power generation efficiency

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