DESIGN OF EXPERIMENTAL MODEL FOR STARTUP AND POWER FACTOR CONTROL OF LARGE-CAPACITY SYNCHRONOUS MOTOR

Dương Quốc Hưng; Nguyễn Hữu Công; Nguyễn Văn Liễn; Lê Đình Sơn; Nguyễn Thế Cường

doi:10.34238/tnu-jst.4889

DESIGN OF EXPERIMENTAL MODEL FOR STARTUP AND POWER FACTOR CONTROL OF LARGE-CAPACITY SYNCHRONOUS MOTOR

About this article

Received: 12/08/21 Revised: 14/10/21 Published: 15/10/21

Authors

1. Duong Quoc Hung , TNU - University of Technology
2. Nguyen Huu Cong, Thai Nguyen University
3. Nguyen Van Lien, Hanoi University of Science and Technology
4. Le Dinh Son, ASO Mechatronics joint stock company
5. Nguyen The Cuong, Thai Nguyen University

Abstract

Synchronous motor has many advantages in efficiency, torque and working stability, so it is often applied in large power transmission systems. However, the rotor side of the synchronous motor needs a variable excitation device, so the control of the synchronous motor is complicated. This exciter must perform two tasks. When start up, it must determine exactly when to apply the excitation source to the rotor windings so that the stator's magnetic field "catches" the rotor's magnetic field and rotates synchronously. In the working mode, the excitation controller must automatically adjust the excitation source to stabilize the power factor of motor to the setpoint. This paper presents the design of an experimental model to "catch" synchronously at start-up and control the power factor when working of a large-capacity synchronous motor. With the addition of input conditions to "catch" the synchronization and use the PI controller combined with trial and error method to determine the controller's parameters to create an optimal excitation system.

Keywords

Synchronous motor; Excitation system; Ziegler nichols method; Trial and error method; Start-up the synchronous motor

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DOI: https://doi.org/10.34238/tnu-jst.4889

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