Abstract: Application of TAC1 series high performance high power inverter products of Tianjin Electric

Research Institute on 20-high reversible mill was introduced.The common DC bus multi drive system consists of

active infeed converter and inverter. Firstly，the device selection of the system and the calculation of transformer

capacity were introduced，then the parallel connection mode of high-speed optical fiber communication of parallel

inverter was described，and PROFINET communication network of the system. The real-time parameter curve

recorded by the software was analyzed by the upper computer IBA，and reflected the speed and torque accuracy on

inverter during operation；the system used the power data measured by the power analyzer to analyze the power

factor of the grid side；in order to avoid the overtemperature fault of the device，the system does not need to shut

down and cause belt break，which increases the rejection rate，the system can make real-time warning of the ambient temperature and the device temperature，realizing the tension controllable shutdown and reducing the chance of broken tape.The system not only ensures the stable operation of the system，but also improves the control accuracy of the system and reduces the energy consumption.

    Key words: high power；parallel；active infeed converter；high speed light communication