可大規模收集分散式小電能之新式收集網

Abstract

本論文提出可以大規模收集分散式小電能之新式收集網。有鑑於傳統式直 流串並聯收集辦法有很多缺點，主要是在大規模收集時，大電力的電源會 壓制小電力電源對網路供電，使得直流網路收集辦法有很差的收集效率， 因此本論文提出新式交流收集網路去解決傳統直流收集法的缺點．本論文 證實了具有等電位環的樹狀交流電能收集網路系統，本身對傳輸線的特性 阻抗變化不靈敏，且可消除電源電力不均的能力；當電源或傳輸線發生故 障時，系統依然穩定地操作．這完全歸功於等電位環結構．但是，具有等 電位環的樹狀交流電能收集網，它不能用於收集輸出頻率不同的電源電力 ．文中我們提出運用四分之一波長的傳輸線理論，將共振式直流至交流電 壓轉換器與四分之一波長的傳輸線以級聯方式相接，可得到高輸出阻抗的 交流電流源，同時求出它的等效輸出電路． This thesis has presented a new ac network concept, which is completely different from the conventional dc networks, to automatically collect, accumulate, and transmit large amount of ac power sources into useful large power flow. Thetree-like network systems have been proven to have less sensitivity to the parameter variations of transmission lines, eliminate the non- uniform distribution among different power cells, and stably operate when some cells or transmission lines are broken, because that their structure has important equal potential rings added into their layers. The electric cells used in the tree- like networks with equal potential rings permit to have variations in phase and amplitude, but not permit frequency variations leading to the amplitude fluctuationsin the system. Our studies also describe one new implementation of ac current sources which is derived from the cascade of the resonant voltage-source inverter and a quarter-wavelength transmission and determine its equivalent output circuit.