A method for judging the access mode of a battery panel and an inverter
An access mode, battery board technology, applied in the measurement of electrical variables, the conversion of AC power input to DC power output, and the conversion of irreversible DC power input to AC power output, etc., can solve problems such as input power loss
Active Publication Date: 2016-07-27
SUNGROW POWER SUPPLY CO LTD
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[0004] In view of this, the present invention provides a method for judging the connection mode of a battery panel and an inverter to solve the problem of input power loss caused by wrong control in the prior art
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[0047] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.
[0048] The invention provides a method for judging the connection mode of a battery panel to solve the problem of input power loss caused by incorrect control in the prior art.
[0049] Specifically, the method for judging the connection mode of the battery panel is applied to an inverter in a photovoltaic power generation system. The inverter includes: a multi-channel DC side circuit, an inverter bridge and a controller. The multi-channel ...
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An inverter and a method for determining a connection mode of a cell panel in the inverter. The determining method comprises: a controller detects voltage values at input ends of multiple direct current side circuits (S101, S201); determine whether a difference between the voltage values is smaller than a preset value (S102, S206); when it is determined that the difference is larger than the preset value, determine that the cell panel is in an independent connection mode (S103, S203); when it is determined that the difference is smaller than or equal to the preset value, determine by default that the cell panel is in a parallel connection mode (S104, S207); and when it is determined by default that the cell panel is in the parallel connection mode, generate and output, by means of voltage control, the same current specified value to the multiple direct current side circuits (S105, S208), detect again the voltage values at the input ends of the multiple direct current side circuits, and determine the connection mode. By means of the determining method, the controller in the inverter has the function of determining the connection mode, actual judgment of a user is not needed, and the problem of input power loss caused by wrong control adopted by the inverter due to misjudgment of the user is avoided.
Description
Technical field [0001] The invention relates to the technical field of photovoltaic power generation, and in particular to a method for judging the connection mode of a battery panel and an inverter. Background technique [0002] In the current photovoltaic power generation system, due to the actual needs of the user for the configuration of the battery panel, the general system will adopt a multi-input access method, such as figure 1 As shown, taking two solar panels PV1 and PV2 as an example, the user has two access modes for the configuration of the solar panels: independent access modes that are independent of each other and do not interfere with each other. At this time, the control adopts independent control. ; Or connect the positive ends of the two solar panels PV1 and PV2, and the negative ends of PV1 and PV2, which is called parallel access mode, and the control adopts parallel control. [0003] In the prior art, if there is a large input voltage difference in the multipl...
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IPC IPC(8): H02M7/48H02M7/538G01R19/165
CPCH02J3/38H02M7/48
Inventor 耿后来曹金虎金曼倪华伍永富李浩源
Owner SUNGROW POWER SUPPLY CO LTD