Real-Time Sensorless Control of PMSM and SCADA Integration

This article presents an application of real-time control of a Permanent Magnet Synchronous Motor (PMSM) and its integration into Supervisory Control And Data Acquisition (SCADA). Starting from the operating equations of the PMSM and by implementing the global Field Oriented Control (FOC) control strategy, in which the saturation of the integral component of the PI-type controller is prevented by using an anti-windup technique, the numerical simulations performed in Matlab/Simulink lead to good performance, which recommends the real-time implementation. The numerical simulation step is necessary to choose the type of Digital Signal Processing (DSP) used for the real-time implementation, considering that a global criterion of successful implementation is the performance/cost ratio. Moreover, the integration into SCADA provides flexibility of the control system but also the possibility of online/offline processing from the point of view of other specific requirements. Among them we mention the energy quality analysis, whose first exponent calculated also in real-time is Total Harmonic Distortion (THD). Real-time implementations are performed in Matlab/Simulink and LabVIEW programming environments. According to the trend of the last years, the use of an Internet of Things (IoT) platform for viewing the variables of the control process on the Internet has a special place.