Energy management system and method for integrated charging and energy storage based on microgrid

Abstract

The invention discloses a microgrid-based charge and energy-storage integrated energy management system, which comprises a distributed generation unit, a charge unit, an energy storage unit, an area power supply unit and an energy management system, wherein output ends of the distribution generation unit and the area power supply unit are electrically connected with input ends of the energy storage unit and the charge unit through alternating current buses respectively; meanwhile, the output end of the distribution generation unit is electrically connected with the output end of the area power supply unit through the alternating current bus; the energy management system comprises a distributed monitoring unit, a battery management system (BMS) unit, an electrical load monitoring unit, a charge monitoring unit, a metering and billing unit, an environment monitoring unit, a master monitoring unit and an operation interface unit; the distributed monitoring unit is electrically connected with the distributed generation unit; the BMS unit is electrically connected with the energy storage unit; the electrical load monitoring unit is electrically connected with the area power supply unit; the charge monitoring unit is electrically connected with the charge unit; the metering and billing unit is electrically connected with the charge unit; and the environment monitoring unit is arranged in the distributed generation unit.

Description

technical field [0001] The invention relates to the technical field of power supply management of regional power grids, in particular to an energy management system and method based on a microgrid that integrates charging and energy storage. Background technique [0002] In recent years, the number of fuel vehicles in cities has grown rapidly, and the exhaust gas of fuel vehicles has become one of the important factors for environmental problems such as urban smog and PM2.5. As a green vehicle with broad development prospects, new energy electric vehicles are being actively promoted by governments of various countries, and electric vehicles have developed by leaps and bounds. [0003] With the maturity of electric vehicle charging and swapping technology and the large-scale promotion and use of electric vehicles, the number of supporting charging equipment for electric vehicles will grow rapidly. There are two types of charging piles for household new energy electric vehicl...

AI Technical Summary

Problems solved by technology

However, the power supply systems of residential areas, CBDs, schools, road parking lots, or service areas did not take into account the load of charging pile construction at the beginning of construction. The capacity of the matching transformers in the early stage was small, and the number of charging piles that could be built was extremely limited. , this problem will hinder the development of new energy electric vehicles

[0004] At present, the conventional method is to upgrade the capacity of the original transformer or build a dedicated transmission line for the charging station. These two methods may not only require the transformation of the transmission line, which requires a large investment, but are also limited by the total capacity of the upper-level transformer station. Upgrading or The capacity of new transformers is limited

Therefore, the power supply problem of the regional power grid will seriously restrict the construction of electric vehicle charging piles, thereby hindering the development of new energy electric vehicles

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