Assessment of duration of the drive operation in the mode of kinetic energy recovery under power supply voltage sags in electrical grids of mechanical engineering enterprises

International Conference on Mechanical Engineering, Automation and Control Systems 2016

机械制造;无线电电子学;计算机科学

Shonin, O.B.^1 ; Novozhilov, N.G.^1

Department of Electrical Engineering, Saint-Petersburg Mining University, 2, 21st Line, St Petersburg

199106, Russia^1

关键词: Computer modeling;    Electrical grids;    Engineering enterprise;    Induction motor drive;    Normal condition;    Power supply voltage;    Production process;    Variable frequency drives;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/177/1/012142/pdf
DOI  :  10.1088/1757-899X/177/1/012142

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

Voltage sags in electric grids of mechanical engineering enterprises may lead to disconnection of important power consumers with variable frequency drives from the power grid and further interruption of the production process. The paper considers a sensorless V/f control system of IRU induction motor drive under normal conditions and under voltage sags on the basis of a computer model of the drive and derivation of a formula for assessment of possible duration of the drive operation in the mode of controlled recovery of kinetic energy accumulated in rotating mass of the drive. Results of simulations have been used to validate results of calculations of the rotor velocity deceleration made in a closed form obtained from the equation reflecting the balance of torques. It is shown that results of calculations practically coincide with results of simulations in the range up to 5% of the velocity initial value. The proposed formula may be useful for estimation of the duration of the drive operation in the mode of recovery of kinetic energy depending on parameters of the motor and driven mechanisms.