Outline
- I. Introduction
- II. Transformer Coupled Dual Input Converter
- III. Control System
- IV. Simulation Results
- V. Conclusion
رئوس مطالب
- چکیده
- 1. پیشگفتار
- 2. مبدل ورودی دوگانهی همراه ترانسفورماتور
- A. اصل عملیاتی TCPIC
- B. جریان القاگر مثبت میشود
- C. جریان القاگر منفی میشود
- D. کنترل شارژ باتری و MPPT
- E. کنترل شارژ-تخلیهی باتری
- 3. سیستم کنترل
- 4. نتایج شبیهسازی
- 5. نتیجهگیری
Abstract
Power from Solar is absolutely perfect for use with irrigation systems for gardens; allotments; greenhouses and also for supporting the main grid. Since the power generation of PV system is highly depends upon the environmental conditions such as availability of sunlight; atmospheric temperature; wind speed etc. Combining a storage device with PV is one of the viable solutions to deal with the intermittency of renewable energy sources. Conventional methods of combining these components involve multistage converters and single-stage converters. The no of stages and switches increases the overall efficiency of the system decreases. In the conventional system an individual converter is used for maximum power point tracking and also a battery charge controller. These two individual converters are not used in every time. Transformer coupled dual input DC-DC converter is discussed in the system which integrates both the MPPT and battery charging discharging control. A coordinated control is used for making the system to work in four different modes of operation and there by satisfying the efficient MPPT and battery current tracking. The system is simulated and studied under various conditions in MATLAB/Simulink platform.
Keywords: Battery Charge Control - Integrated Converter - MPPT Tracking - PV-Battery System - TCDICConclusions
Among the RES (renewable energy sources) available in the world PV based energy harvesting are more reliable for rural;off grid and also for green energy applications. Since the electrical energy available from PV is DC we can use it for serving the DC loads which reduces the conversion losses. Since RES depends largely on the environmental condition a battery storage system is very essential in PV based standalone system to obtain uninterrupted power supply.
Such a PV-battery based system is proposed in this work which is used serve the DC loads of smart green building. Apart from conventional system the MPPT tracking as well as the efficient battery charging discharging is controlled by a single converter which increases the reliability and efficiency of the system. Need of dedicated converter for ensuring MPP operation of the PV array is taken out here which leads to enhanced utilization of power converters also lesser no of components as the system has only one conversion stage. Isolation as well as the boosting up of input voltage is done using transformer without increasing the number of PV panels and battery. System provides easy and potent control structure ensuring proper operating mode selection and smooth shift between different possible operating modes. The system operations are validated at different operating conditions in the MATLAB/Simulink platform.