A distributed photovoltaic power generation grid-connected intelligent black box and its application

Abstract

A distributive photovoltaic generating grid-connected intelligent black box comprises a housing. A control circuit board is disposed in the housing. The control circuit board comprises a CPU central control circuit module, and a crystal liquid display circuit, a wireless communications module, an intelligent lock module, a satellite positioning module, a power circuit module, a multipath current voltage sampling circuit module, an opening-closing control circuit module, a circuit breaker with a shunt trip, a grid connecting end, a user connecting end, and a distributive generating grid-connected connecting end that are separately connected to the CPU central control circuit module. The advantages of the distributive photovoltaic generating grid-connected intelligent black box are as follows: generation grid connection and a user power wiring are integrated, so that controllability is high; the installation location of a grid-connected device is flexibly selected, installation is convenient, the workload is small, and working efficiency is high; interference from outside natural conditions and human factors are avoided, so that operation is safe and reliable; the daily maintenance workload is small, and maintenance costs are low; independence is high, and the intelligence degree is high; and the development demand of an intelligent grid can be completely met.

Description

technical field [0001] The invention relates to a distributed photovoltaic power generation grid-connected intelligent black box and an application thereof, belonging to the technical field of new energy sources in the electric power industry. Background technique [0002] With the rapid development of photovoltaic power generation technology, the amount of distributed photovoltaic power generation connected to the grid is increasing, and the grid connection device has become one of the problems restricting the safety of the power grid. Distributed photovoltaic power generation adopts a complex wiring method of two electric energy meters and a small circuit breaker to realize grid connection. This distributed photovoltaic power generation grid connection method has the following shortcomings: 1) It is difficult to install and select a grid connection device, and the installation workload is large. High work intensity and low work efficiency; 2) During the operation process, ...

AI Technical Summary

Problems solved by technology

Distributed photovoltaic power generation adopts a complex wiring method of two electric energy meters and a small circuit breaker to realize grid connection. This distributed photovoltaic power generation grid connection method has the following shortcomings: 1) It is difficult to install and select a grid connection device, and the installation workload is large. High work intensity and low work efficiency; 2) During the operation process, it is extremely susceptible to interference from external natural conditions and human factors such as rain, ice, snow, dust and corrosive gases, and there are great safety hazards during the operation process; 3) The grid-connected wiring is complicated and long access cycle; 4) The daily maintenance workload is heavy and the maintenance cost is high; 5) Two electric energy meters are used for measurement, and the electricity consumption and power generation are measured separately, while the on-grid electricity is measured by the difference between the two meters. It is an indirect reflection of the electricity on the grid

At present, there are no reports on the application of photovoltaic distributed power generation grid-connected smart black box devices

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