The construction of a new type of power system with dual carbon-driven green economic transformation and a high proportion of clean power is profoundly changing energy consumption habits. As one of the main battlefields of distributed photovoltaics, buildings are also the largest application scenarios for terminal appliances. The intermittence and volatility of new energy sources such as photovoltaics make it difficult for buildings to operate stably and efficiently consume energy, which has become a huge challenge for future development. The development of power electronics and information electronics has brought great changes to the power industry and laid the foundation for the DC of building electrical appliances. In particular, new energy sources such as photovoltaics and energy storage have low-voltage DC characteristics, which further promotes the replacement of AC by DC, making it the development trend of the electric ecology.
After the DC of building electrical appliances, it can better realize the DC direct drive of the source and the load, and efficiently and stably consume it. In addition, it can improve the level of intrinsically safe power consumption, realize flexible energy consumption, and improve the environmental friendliness of the building power supply system. At present, the direct current of building electrical appliances still faces problems such as the DC voltage level of the power supply, the mismatch of the access interface, and the industrialization of direct current.
The topic of building electrical DC technology and interface standards (equipment) mainly focuses on the comprehensive analysis of the key technology system for the development of direct current and interface of solar-storage direct-flexible buildings, and systematically establishes the key technical framework of building electrical DC. Standards, demand-side response models, etc. are studied.
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