Smart Box-type Switch Station Developed

Based on the literature reviewing, the current situation and existing problems are introduced. A design idea about intelligent box-type substation is proposed to solve the existing problems. According to the practical condition of STAR High-Tech, the design contents of box-type substation are described in very much detail, especially, the scheme design for intelligent box-type substation including the main equipments and auxiliary equipments is the key issue to manufacture this kind of product. It is also the key aspects of this paper. Because there are a lot of box-type substations proposals, for different substation, the customer requirements are different. The typical layout of intelligent box-type substation is also introduced. Based on the practical situation, the design for Yaoshan lOkv box-type substation, Yunnan, is presented. Finally, the performance of intelligent box-type substation is analyzed.The intelligent box-type substation is covered by zinc. The main bus is located in a room, separated with the lOkv switchgear. And the measurement room. It has advantages compared with the similar products. This layout can stop the internal arc fault expansion; can avoid harmful moisture, small animal and dusty interferences. It also has good perfomiance and high reliability. Because the heat cannot transmit to the outside of the bus room, a good operation environment for the low space can be obtained. In addition, the intelligent box-type substation use JSXGN type mechanical interlock. In order to simplify the structure, improve the reliability, the design is improved. An auxiliary switch is added, it is integrated with handler of the isolation switch, grounding switch. The maintenance for the auxiliary switch can be carried out in the maintenance room. There are interlock between the door and isolation switch or the grounding switch, only after the isolation switch is open or the grounding switch is closed, the door can be opened, It is the unique characteristics of the substation. The distributed complicated automation system is adopted. The power supply for the control system is the microprocessor controlled DC power supply. It has the advantages of reasonable structure, multi-functions and easy installation.The box-type substation can be widely used in 35-110kv or lOkv substation. It has high reliability and reduces the occupying land, shortens the construction period and reduces the cost. It is coincident with the requirements of the power industry ministry of China for the construction of countryside substation.