Control method of component turn-off device, and component turn-off device
A control method and component technology, applied in the direction of electrical components, photovoltaic power generation, AC network circuits, etc., can solve the problems of unfavorable promotion and large-scale use of component disconnectors, increase the volume of component disconnectors, etc., and achieve favorable promotion and The effect of large-scale use, reduction of overall volume and cost, and reduction of system power consumption
Active Publication Date: 2019-07-05
ZHEJIANG INTEPOWER ELECTRONIC CO LTD
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Problems solved by technology
[0004] It can be seen that, in order to avoid disconnection of the output voltage power supply caused by the sag of the input voltage, the component disconnector in the prior art needs to increase the capacitor for continuous power supply, and the continuous power capacitor will inevitably greatly increase the volume of the component disconnector, which does not Conducive to the promotion and large-scale use of component disconnectors
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[0045] The core of the present invention is to provide a control method of a component disconnector and a component disconnector, which are used to reduce the volume of the component disconnector, thereby facilitating the popularization and large-scale use of the component disconnector.
[0046] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0047] figure 2 A circuit diagram of a module switch provided by an embodiment of the present invention; image 3A flow chart of a control method for a component switch pro...
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The invention discloses a control method of a component turn-off device. On the basis of an existing component turn-off device, a control chip controls a communication chip to be closed after detecting that the input voltage of the component turn-off device is lower than a preset threshold value, so that the power consumption of the system is reduced, the needed electric energy is reduced in the time period of the input voltage sag, the power supply in the input voltage sag can be met without arranging a large-volume follow-up capacitor, the overall size and the cost of the component turn-offdevice can be further reduced, and popularization and large-scale use of the component turn-off device are facilitated. The invention further provides the component turn-off device which has the beneficial effects.
Description
technical field [0001] The invention relates to the technical field of system safety protection, in particular to a control method of a component disconnector and the component disconnector. Background technique [0002] Due to the renewable and clean nature of solar energy, photovoltaic grid-connected power generation technology has developed rapidly. In a common photovoltaic system, multiple photovoltaic modules are connected in series to form a string, and then connected to an inverter to convert DC to AC and connect to the grid. The photovoltaic modules connected in series form a DC high voltage, which will cause personal danger and fire accidents. Therefore, the on-site photovoltaic system requires the inverter to have anti-arc protection, that is, the operation of the inverter must be shut down immediately when an arc is detected. However, even if the inverter stops running, the DC cables after the photovoltaic modules are connected in series will still output high vo...
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IPC IPC(8): H02J3/38
CPCH02J3/383Y02E10/56
Inventor 周懂明罗宇浩
Owner ZHEJIANG INTEPOWER ELECTRONIC CO LTD