Protection Device Platform Design Adapted to Distributed Smart Grid

The distributed smart grid realizes the upgrading and transformation of the distribution network form by serving the development of new energy. The new power grid form puts forward new requirements for protection devices. In this paper, a protection device adapted to the construction of distributed smart grid is designed, which can accept the current and voltage analog signals collected by substations, convert them into several digital signals after AC/DC conversion, and identify different fault types of distributed smart grids under the background of clean energy access to the power system after processed by relay protection algorithms in the chip. The device is composed of a protection measurement module, input circuit, output loop, chip, communication loop, and human-machine interface loop, and this paper gives the detailed circuit interface design and equipment selection of each module, which is of great significance to the construction of distributed smart grid.