獨立型太陽光發電系統可靠度提升研究

Abstract

本研究旨在探討如何提升獨立型太陽光發電系統的可靠度。第一部分為研究蓄電池(矽鉛電池)的充放電特性以及SOC(State of Charge) 估測，避免蓄電池過放電影響電池壽命，降低系統的可靠度。第二部分則探討以系統停載機率為基準的獨立型太陽光發電系統匹配設計，開發獨立型太陽光發電系統模擬程式，透過系統模擬探討匹配設計對LLP(Loss of Load Power)發生機率的影響。最後架設一個獨立型太陽能冰箱系統進行實測分析。

The thesis aims to investigate how to improve the reliability of an independent solar PV (Photovoltaic) system from battery discharge control and optimal system design for a given probability of LLP (loss of load power). First, we measured the charge and discharge curves of Si-Pb battery (Nano Carbon Silicon Solid-State Battery) and develop a SOC (State of Charge) estimation scheme using Coulomb method to avoid battery over discharged. Secondly, we develop a long-term system simulation program to study the effect of PV system design and load pattern on the probability of LLP and running cost of the system. Finally, an independent solar PV refrigerating system was built and tested to verify the simulation results.