Abstract:In view of the defects of functional design and structural design of the existing distribution box, an intelligent modular distribution device of distribution transformer district is designed and developed. The device adopts modular assembly structure, the inlet unit, outlet unit and compensation unit are designed as standardized independent boxes. When installing or overhauling and replacing, the functional units are combined and connected according to requirements. The internal component of the device is designed as a standardized installation module, When the function configuration is changed or overhauled later, the required device modules can be added or replaced, which greatly improves the economy, flexibility and scalability of the distribution device. The device strengthens the protection and isolation measures on the functional structure, fully guarantee the reliability, rapidity and safety of operation and maintenance. The device optimizes the comprehensive control function of power quality, improves the reactive power compensation scheme, increases the three-phase unbalance compensation unit, and further improves the power quality and economic operation level of the station area. Through the actual operation in the pilot area, the feasibility of the device design scheme is verified, and finally the product can be popularized and applied.