研究目的
To develop an efficient and reliable single stage grid interactive solar powered switched reluctance motor (SRM) driven water pumping system with an improved control technique for proficient MPPT tracking, bidirectional power flow, harmonics elimination, DC offset rejection, and enhanced dynamic performance.
研究成果
The proposed single-stage grid interactive solar powered SRM driven water pumping system with the improved control technique effectively provides efficient MPPT tracking, bidirectional power flow, harmonics mitigation, and DC offset rejection. It offers reliable operation under varying environmental conditions without the need for a battery, reducing cost and maintenance. The system meets IEEE 519 standards for power quality and demonstrates enhanced dynamic performance through simulations and hardware validation.
研究不足
The system is designed for single-phase grid connection and may not be directly applicable to three-phase systems. The control complexity might increase with larger systems, and the absence of a battery could limit energy storage capabilities in completely off-grid scenarios.
1：Experimental Design and Method Selection:
The system is designed as a single-stage configuration without a DC-DC converter, using a PV array, RC filter, interfacing inductor, and a mid-point converter. An improved P&O MPPT algorithm and an enhanced generalized integrator-based control are employed for MPPT tracking and grid synchronization.
2：Sample Selection and Data Sources:
A PV simulator (AMETEK ETS600x17DPVF) with 860W peak power output is used to simulate the PV array. A 8/6 pole, 4-phase, 1500rpm SRM drive is used to drive the pump.
3：List of Experimental Equipment and Materials:
PV simulator (AMETEK ETS600x17DPVF), DSP-dSPACE 1202 MicroLabBox for control execution, digital storage oscilloscope (Agilent DSO-7014A), SRM drive, RC filter components (Rf=5Ω, Cf=10μF), interfacing inductor (Lf=2mH), DC link capacitors (CDC=300μF).
4：Experimental Procedures and Operational Workflow:
The system is tested under various operating modes (PV only, grid only, both PV and grid, no load) with changes in insolation levels and grid conditions. Data on grid voltage, grid current, PV voltage, PV current, motor winding current, and drive speed are collected.
5：Data Analysis Methods:
Performance is analyzed using MATLAB simulations and hardware test results, focusing on MPPT efficiency, power quality (THD), dynamic response, and harmonic spectrum analysis.
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