Metering box used for low-voltage distributed type photovoltaic power generation

Abstract

The invention discloses a metering box used for low-voltage distributed type photovoltaic power generation. The metering box comprises a box body, and a generation power meter, a gate meter and a power information acquiring terminal connected with the generation power meter and the gate meter are arranged in the box body. A terminal of the generation power meter is connected with an inverter of photovoltaic power generation through a first switch device, a terminal of the gate meter is connected with a load switch device through a second switch device, and the other terminals of the generation power meter and the gate meter are connected with a load through a third switch device. Power generation, grid connection, offline metering and control devices are all packaged in the same box body, so that the metering box has an automatic stealing-preventing control performance thoroughly.

Description

technical field [0001] The invention relates to the field of electric power generation, in particular to a metering box for low-voltage distributed photovoltaic power generation. Background technique [0002] As the country vigorously advocates and promotes new energy projects, more and more residents come to apply for distributed photovoltaic grid-connected projects. According to the different grid-connection needs of customers, according to the principle of "four unifications, convenience and efficiency", speed up the grid-connection speed of distributed photovoltaic power generation projects, and complete the grid-connection services for customers within the process time limit. [0003] However, in the process of grid-connected services, there is a more prominent problem. Because the residential distributed photovoltaic power generation project has certain requirements for the equipment installation site, or the ground, or the roof, or the water surface, the residential d...

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Problems solved by technology

[0003] However, in the process of grid-connected services, there is a more prominent problem. Because the residential distributed photovoltaic power generation project has certain requirements for the equipment installation site, or the ground, or the roof, or the water surface, the residential distributed photovoltaic power generation project that has the installation conditions has certain requirements. Photovoltaic power generation projects are mostly scattered in towns and villages in counties (districts), and the business area is extended to counties and companies

Although the business windows of the city and county companies have launched distributed photovoltaic grid-connected services in a timely manner, after entering the construction stage, because the metering boxes are invested and manufactured by customers themselves, some of the metering boxes provided by customers are based on existing household meter boxes. Some of the transformations carried out are custom-made by customers. The materials, sizes, reserved meter positions, switch configurations, etc. are chaotic. There is no unified technical requirements and configuration principles, and the quality cannot be guaranteed. Failure to pass the grid-connection acceptance application due to reverse power transmission measures and low configuration standards, which affects the service progress of the distributed photovoltaic grid-connected project and easily causes customer dissatisfaction

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