研究目的
The objective of the proposed work is to design and implement a fuzzy logic based energy management strategy to a hybrid wind solar system for rural electrification.
研究成果
The proposed hybrid wind-photovoltaic system with a fuzzy logic-based energy management strategy shows good performance in maintaining a stable and safe operation. The system efficiently manages diverse renewable energy resources, leading to a reduced operating cost and confirming the effectiveness of the proposed strategy for all operating modes.
研究不足
The study is focused on stand-alone applications and may not directly apply to grid-connected systems. The performance is dependent on the availability of wind and solar resources, which are variable in nature.
1：Experimental Design and Method Selection:
The study involves the design and implementation of a multi-source hybrid Wind-Photovoltaic stand-alone system with a proposed energy management strategy. The system topology is defined, and the various sources are interconnected for maximum energy transfer, optimum control, and energy management to maintain the DC bus voltage at a fixed value.
2：Sample Selection and Data Sources:
The system comprises a 600 W wind generator equipped with a Permanent-Magnet Synchronous Generator (PMSG) and a 400W photovoltaic panel. The system is designed to control the output current and voltage based on wind speed, solar irradiation, battery voltage, and power demand.
3：List of Experimental Equipment and Materials:
The experimental setup includes a DC motor as the prime mover, an Induction machine, a three-phase step-down transformer, a Diode bridge rectifier, a voltage buck regulator (LM 2576), and a dispatch module with relays for load, battery, and charge control.
4：Experimental Procedures and Operational Workflow:
The system operates in different modes (Solar, Wind, Solar and Wind, Battery) based on the availability of renewable resources and load demand. The Fuzzy logic controller adjusts the threshold value for optimal performance.
5：Data Analysis Methods:
The performance of the system is analyzed through simulation and hardware implementation, focusing on the regulation of the DC bus voltage and the efficiency of the energy management strategy.
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Permanent Magnet Synchronous Generator
PMSG
Used in the wind subsystem to generate electricity from wind energy.
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Diode bridge rectifier
Converts the AC voltage from the PMSG to DC voltage.
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DC/DC buck converter
Regulates the DC output voltage to a constant value for the DC bus.
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Photovoltaic panel
Generates electricity from solar energy.
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Light Dependent Resistor
LDR
Senses the solar radiation for the photovoltaic subsystem.
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Voltage buck regulator
LM 2576
Steps down and regulates the DC output voltage from the photovoltaic panel.
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Microcontroller
Implements the fuzzy logic-based energy management strategy.
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Relay
SFH 6106
Acts as a switch in the dispatch module for load, battery, and charge control.
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Relay driver
ULN 2003
Drives the relays from the microcontroller output.
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