Research on Key Technologies of Low voltage Flexible direct system based on Station area Energy consumption optimization

This paper mainly studies the periodic heavy overload problem in the station area. Combined with the energy management system, it can realize the access of lighting, storage and charging of DC bus, as well as the application of three terminals or multi terminal AC port. Through collaborative scheduling, it can promote the consumption capacity of renewable energy in the station area and be applied to the field of AC / DC hybrid microgrid with interactive source network load. Because the converter valve has four quadrant operation capacities, it is designed and developed based on the software and hardware platform with unified functions such as energy storage, reactive power compensation, harmonic compensation and imbalance treatment. A set of key equipment of low-voltage flexible and direct system composed of two converter valve modules with two-way power transmission function is developed and installed in the two low-voltage distribution stations to realize flexible interconnection and energy mutual assistance between the two low-voltage stations and improve the optimization level of energy consumption in the station area.