節能型的分散式電源系統

Abstract

傳統的電源系統由簡單設計的中央式電源系統為降低元件上的電流應力，進而提出分散式電源系統的架構。分散式電源系統因為些許的輸出電壓差異即造成每個模組提供的電流差異性很大，應而降低部分電源模組的可靠性。為了改善並聯模組的可靠度，在後級加上了均流機制。大部分的議題在探討其均流差異量的精準度到很小，及不再往下探討。 本論文在於探討系統設計上，除了使用均流技術達到大電流的需求外，針對電源管理議題以提出一節能型分散式電源管理的原型 ( The prototype of the power saving of the distributed power system )。在大部分的時候，系統通常不會操作在滿載或者重載，而分散式電源系統設計時通常以冗餘系統架構為主。當輕載時，意味者每個電源模組的效率均很差，此時並不需要令每個電源模組均處於工作狀態。換言之，在輕載時只要適當地控制電源模組工作的數量並令其效率提升，即可減少因為功率損失所造成的溫度上升，且有效提升電源系統的可靠性。當重載時，令冗餘系統中的保護電源模組工作，降低其他工作電源模組的電流應力。換言之，在重載時只要適當地增加多餘的電源模組工作的數量，則其電流平方乘以導通電阻的功率損耗降低。如此，亦可以提升冗餘電源系統的可靠性。 總而言之，適時地控制冗餘電源模組工作的數目，令分散式電源系統工作在高效率、低損失的狀態。讓整個電源系統降低元件的應力、成本並提高可靠度。

Traditional power system from the simple design of the central power system components to reduce the current stress, and proceeded to put forward the distributed structure of power system. The current sharing is applied to solve the little difference in the output voltage of each module that is causing the current big difference. Most of the topics are focused on the accuracy of the current sharing deviation and not further discussion. Based on the distributed power supply system with current sharing mechanism, this paper is to explore how to improve the power efficiency of the system. In most of the time, the system does not normally operate in full load, and distributed power system is usually designed mainly to redundant system architecture. When light loads, each power stage works at the same time that means all of them at poor efficiency. In other words, in light load, as long as to control the proper number of the power stages and upgrading the efficiency. When heavy load, let the protect power modules of the redundant power supply system work, to reduce current stress of the other working power modules. In other words, as long as to increase the amount of the proper redundant power supply modules work in heavy load, its current square multiplied by on-resistance reduce the power loss lower. In short, properly control the number of redundant power modules and cause the distributed power systems to work in high-efficiency, low-loss and increase reliability.