184 research outputs found
Single-Switch Differential Power Processing PWM Converter to Enhance Energy Yield of Photovoltaic Panels under Partial Shading
The partial shading on a photovoltaic (PV) panel consisting of multiple substrings poses serious issues of decreased energy yield and occurrence of multiple maximum power points (MPPs). Although various kinds of differential power processing (DPP) converters have been proposed to prevent the partial shading issues, multiple switches and/or magnetic components in proportion to the number of substrings are necessary, hence increasing the circuit complexity and volume. This chapter proposes a novel single-switch DPP PWM converter to achieve simplified circuit. The proposed DPP converter is essentially the combination of a forward/flyback resonant inverter (FFRI) and voltage multiplier (VM). The fundamental operation analysis is performed, and the current sensorless control strategy suitable for the proposed DPP converter is also discussed. A 30-W prototype of the proposed DPP converter was built, and various kinds of experimental verification tests were performed emulating partial shading conditions. With the proposed DPP converter, local MPPs of a partially shaded PV panel were successfully eliminated, and energy yield was significantly enhanced, demonstrating the efficacy and performance of the proposed DPP converter
Effectiveness of Winter-Flooding in Organic Rice Farming and Some Relating Management Practices
Poster Session
The Relationship Between Seedling Quality and Root System of Rice Seedling in Organic Farming Analyzing with Root Modeling
Poster Session
The Relationship Between Deep Rooting and Nitrate Leaching of Wheat in Subsoil Acidity
Poster Session
Optimum Level of Soil Available Phosphorus for AMF Inoculation to Welsh Onion in Non-Allophanic Andosol
Poster Session
Analysis of Differences in Rice Panicle Structure Between Organic and Conventional Farmings Using Image Analysis Technique
Poster Session
Positive Effects of Tubificid Worms on Rice Growth and Yield in Organic Farming System
Poster Sessio
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