The so-called microgrid refers to a small distribution power system consisting of distributed power supply, power load, power distribution facilities, monitoring and protection devices, etc., which are divided into two types: grid-connected and independent, which can realize self-control and autonomous management. . Among them, the grid-connected microgrid can be operated in parallel with the external grid or independently from the network.
According to the person in charge of Longyuan Power, Turpan New Energy City Microgrid is China's first microgrid demonstration project, which was completed and put into operation at the end of 2013. The project will build 8.7 megawatts of photovoltaic roof on the roof of 293 residential buildings. In the same period, a 10 kV switch station and monitoring center, a 1 MW energy storage device, and a bus charging station will be built. More than 5,700 households, institutions, business units, geothermal heat pumps and other users provide power.
The project implements the operation mechanism of “spontaneous use, margin online, and power grid adjustmentâ€. The project company has management rights, management rights and power sales rights in the micro-grid area. The acquisition of the power business license marks that Longyuan Turpan New Energy Co., Ltd., which is in charge of the project, has successfully obtained the qualification of the distribution business and became a power sales company with the right to operate the distribution network.
Compared with the United States, Japan and Europe, China's microgrid started late. Two years ago, the construction of the micro-grid project was officially upgraded to the national level, requiring remote power regions and islands not covered by the power grid, giving priority to the new energy micro-grid approach and exploring new modes of independent power supply technology and operation management.
Casting is the process of pouring molten metal into a mold and cooling and solidifying to obtain parts with the desired shape and properties. Casting is a commonly used manufacturing method, with low manufacturing cost and great process flexibility, and can obtain complex shapes and large castings. 50 to 60%.
Due to the increasing requirements for casting quality, casting accuracy, casting cost and casting automation, casting technology is developing in the direction of precision, large-scale, high-quality, automation and cleaning. Casting technology, special casting technology, casting automation and casting simulation technology have developed rapidly.
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