An over-temperature protection method and controller of a power optimizer
A power optimizer and over-temperature protection technology, which is applied in the direction of emergency protection circuit devices and electrical components, can solve the problem of high temperature sampling cost, and achieve the effect of reducing temperature sampling cost and quantity
Active Publication Date: 2019-05-31
SUNGROW POWER SUPPLY CO LTD
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[0005] The invention provides an over-temperature protection method and controller of a power optimizer to solve the problem of high temperature sampling cost in the prior art
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[0054] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.
[0055] The invention provides an over-temperature protection method of a power optimizer to solve the problem of high temperature sampling cost in the prior art.
[0056] The over-temperature protection method of the power optimizer is applied to the controller of the power optimizer in the photovoltaic power generation system, and the photovoltaic power generation system includes N BUCK-BOOST type power optimizers and N temperature sensors set in one-to-one correspondence, N is a positive ...
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The invention provides an over-temperature protection method and a controller for a power optimizer. Different from the prior art with a constant over-temperature protection threshold, the over-temperature protection method is characterized in that corresponding over-temperature protection thresholds are set based on different working state of a power optimizer; and a corresponding over-temperature protection action is triggered only when the temperature of the power optimizer exceeds the over-temperature protection threshold and thus only a temperature sensor needs to be set for each power optimizer in a photovoltaic power generation system formed by N BUCK-BOOST Type power optimizers, so that the number of the temperatures is halved. And for a photovoltaic power generation system formed by M BUCK type power optimizers, only any S temperature sensors smaller than the M sensors are set for all power optimizers; compared with the prior art, the value of the S can be selected freely and thus the number of the temperature sensors is reduced, so that the temperature sampling costs are lowered.
Description
technical field [0001] The invention relates to the technical field of power electronics, in particular to an over-temperature protection method and controller of a power optimizer. Background technique [0002] With the advancement and development of technology, the development of power optimizer is becoming more and more mature, and power optimizer is getting more and more attention; its application system such as figure 1 As shown, the photovoltaic module is directly connected to the power optimizer to realize power optimization at the module level and maximize the increase in power generation. [0003] During the working process of the power optimizer, in order to avoid the shutdown of the power optimizer caused by the overheating of the power device, thereby affecting the stability and reliability of the system operation, the prior art generally sets the number of half-bridges in each power optimizer and its topology. The same temperature sensor, through the correspond...
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IPC IPC(8): H02H7/12
CPCH02H7/1213
Inventor 谷雨李江松谢晶晶杨宗军
Owner SUNGROW POWER SUPPLY CO LTD