Design on intelligent controller of magnetic controlled soft starting for reactive compensation

Abstract

Starting current is too large when the motor is started directly. The motor consumes large amounts of reactive power when it is connected to the electrical network. An intelligent controller of magnetic controlled soft starting is developed for reactive compensation. The controller used the 16-bit MSP430F1612 MCU as a control core. An algorithm with measuring phase angle calculated the power factor, active and reactive power, and could realize auto-tracking of reactive compensation and auto-switching of shunt capacitors. The paper put forward hardware structure and software design in detail. Experimental test demonstrates that the control system can dynamically adjust the output of reactive power compensation equipment, and effectively improve the system power factor, and reduce the motor starting current, so as to achieve the protection of the motor and equipment. © 2011 Springer-Verlag.