کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
766061 1462908 2011 17 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Brushless DC motor drives supplied by PV power system based on Z-source inverter and FL-IC MPPT controller
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی (عمومی)
پیش نمایش صفحه اول مقاله
Brushless DC motor drives supplied by PV power system based on Z-source inverter and FL-IC MPPT controller
چکیده انگلیسی

This paper discusses operation performance of a water pumping system consist of a brushless dc (BLDC) motor coupled a centrifugal pump and accompanying a Z-source inverter (ZSI) fed by a photovoltaic (PV) array, to be improved. Despite conventional double-stage power converters, this paper proposes utilizing a single-stage ZSI to extract the maximum power of the PV array and supply the BLDC motor simultaneously. Utilizing the ZSI provides some inherent advantages such as high efficiency and low cost, which is very promising for PV systems due to its novel voltage buck/boost capability. In addition, in order to precisely perform the maximum power point tracking (MPPT) of the PV array the fuzzy logic-incremental conductance (FL-IC) MPPT scheme is proposed. The proposed FL-IC MPPT scheme provides enough modification to the conventional IC method to enjoy an appropriate variable step size MPPT control signal for the ZSI. Moreover, direct torque control (DTC) is found more effective in comparison with hysteresis current control with current shaping to drive the BLDC motor, because it benefits from faster torque response, reduced torque ripple, less sensitivity to parameters variations, and simple implementation. In the mean time, due to the frequently variations of the PV power generation; delivered mechanical power to the centrifugal pump is variable. Thus, the BLDC motor should be driven with variable reference speed. In order to improve the speed transient response of the BLDC motor and enhance the energy saving aspect of the system, it should enjoy a high quality dynamic response characteristic. Therefore, to realize these purposes, particle swarm optimization (PSO) has been proposed to regulate the proportional-integral-derivative (PID) parameters of the BLDC motor speed controller. The system configuration, operation principle and control methods are presented in detail. Finally, the proposed system was simulated in different operation conditions of the PV array by computer simulations and the effectiveness of the proposed control strategies has been validated by comparative studies and simulation results.


► Employing the BLDC motor in water pumping systems.
► Utilizing the ZSI as a single-stage power converter in the PV water pumping systems based on BLDC motor.
► Improvement of the conventional IC MPPT method with the fuzzy logic control scheme to save more energy from the PV array.
► Taking the advantages of the DTC drive of the BLDC motor.
► Optimizing the water pumping system speed response characteristic by PSO.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Energy Conversion and Management - Volume 52, Issues 8–9, August 2011, Pages 3043–3059
نویسندگان
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