Single Stage PV System based Direct Torque Controlled PMSM Drive for Pump Load Application

ABSTRACT:

This paper presents design and modelling of single stage standalone PV based PMSM (Permanent Magnet Synchronous Motor) drive. Standalone power supply system is more feasible and convenient option for water pumping applications in irrigation. Three phase DTC (Direct Torque Control) VSI (Voltage Source Inverter) is presented for supplying the PMSM for variation in solar irradiation to control the flow of water in pumping application. MATLAB/SIMULINK environment is used for modeled the proposed single stage standalone PV system based PMSM drive and performance is investigated under change in solar irradiation.

 KEYWORDS:

1.      Direct Torque Control

2.      PMSM Drive

3.      Solar PV

4.      Water Discharge System

 SOFTWARE: MATLAB/SIMULINK

 BLOCK DIAGRAM:

Fig. 1 System configuration of Single stage sensor less standalone solar PV based PMSM drive.

 EXPECTED SIMULATION RESULTS:

Fig.2 Steady state performance for single stage standalone PV based permanent magnet synchronous motor drive

Fig.3 Transient performance under change in irradiation

CONCLUSION:

A single stage off-grid solar photo voltaic system has been modeled using the PMSM employed for centrifugal pump load application. The proposed single stage standalone PV system reduces component count, eliminates intermediate power conversion stage and achieves high conversion efficiency for pumping application. The proposed single stage system gives adequate control on PMSM speed under wide variation in solar irradiation and employing DTC control using three-phase VSl.

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