Intelligent direct power distribution switch and working method thereof

Abstract

The invention discloses an intelligent direct current power distribution switch, which comprises a cabinet body, a switch device, a driving device and a monitoring system, and is characterized in that the switch device is installed in the cabinet body, the switch device comprises a driving shaft and a plurality of switch assemblies, the plurality of switch assemblies are connected in parallel in a circuit, and the driving shaft is matched with the plurality of switch assemblies; the monitoring system is suitable for detecting electric signals of two connecting plate assemblies and controlling starting of the driving device according to changes of the detected electric signals so as to drive the driving shaft to control opening or closing of the multiple switch assemblies. The beneficial effects of the application are that the number of the switch assemblies connected to the circuit can be controlled according to the change condition of the electric signals in the circuit so as to protect the safety of the whole circuit, meanwhile, whether the load fails can be judged according to the abnormal electric signals at the two ends of the switch assemblies, and the switch assembly connected with the failed load is disconnected so as to protect the safety of the whole circuit. And the safety of the whole circuit is further improved.

Description

technical field [0001] The application relates to the field of electric equipment, in particular to a DC power distribution switch. Background technique [0002] With the rapid development of distributed photovoltaics, more distributed photovoltaics will be connected to the urban power grid in the future. Under the conditions of the existing AC distribution network, the photovoltaics generated by DC power generation need to undergo DC / DC and DC / AC two-stage conversion. It is inevitable to introduce a large number of converters to the AC distribution network, which causes waste and reduces efficiency, and its random fluctuations also have a direct impact on the power grid. Therefore, how to connect distributed photovoltaics to the grid more effectively, conveniently and reliably has become an urgent problem to be solved. The DC distribution network can realize the flexible access of distributed photovoltaics, omit the DC / AC inversion process, and reduce the power conversion ...

AI Technical Summary

Problems solved by technology

[0003] However, at present, photovoltaic power generation is related to weather conditions such as four seasons, day and night, and cloudy weather due to solar radiation, resulting in unstable power generation. The following problems are prone to occur in the process of photovoltaic DC power distribution:

[0004] (1) Since the rated current of a single power storage device or other load is a fixed value, when the power generation is too large, a single power storage device or other load may be overloaded

[0005] (2) Due to the instability of power generation, its output current is also unstable, which requires higher stability and safety of DC power distribution switches

[0006] (3) Due to the low level of intelligence of the existing DC distribution network, failures or accidents cannot be prevented in time

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