用於工業配電系統可靠度分析之關鍵性元件搜尋研究

本研究利用可靠度區塊圖分析法（Reliability Block Diagram）及故障樹分析法（Fault Tree Analysis, FTA）求出配電系統可靠度數值，進而尋找系統中異常狀態與潛在之問題，並將兩方法相互分析比對，對照IEEE Std 493-1997 所提出可靠度之限制，再運用Birnbaum’s 重要性法則，求得對系統匯流排的關鍵性元件(Critical Device)，並針對系統缺陷處作改善，提升整體可靠度。研究結果顯示，再不考慮人為因素與機組使用壽命時，系統故障事故發生機率與饋線負載數多寡有關；負載分配不平衡時，系統運轉的故障機率將增加，導致生產效率下降，增加成本耗費。進行配電系統可靠度分析時，可求取廠區之平均故障率與不可斷電之負載故障率。此外，研究數據可作為元件適當的替換和設備維修之依據並提昇系統可靠度，減少系統不可斷電之負載停機情況發生，乃降低斷電帶來的損失。為驗證本研究所提方法之可行性，本論文以實際台電161kV配電變電站，作為配電系統可靠度分析之實例研究。

關鍵字

可靠度區塊圖分析法；故障樹分析法；配電系統；關鍵性元件；故障機率

並列摘要

This thesis evaluates the reliability of power distribution power system through Reliability Block Diagram as well as Fault Tree Analysis, FTA, to explore potential problems and abnormal conditions in the system, and then compare between those two methods. Furthermore, this thesis exploits Birnbaum’s importance rule to search for critical device of system bus under the constraints regulated by IEEE standard 493-1997 so as to improve the system, raising the overall reliability. The study results show that, after omitting human factor and normal lifetime of machines, the probability of system faults depend mainly upon the amount of load to feeder, when the capacity distribution of load is unbalanced, the failure rate of operation will increase, lowers production efficiency and adds up the cost. In analyzing dependability of distribution system, we can evaluate the average fault rate of customer and fault rate of uninterruptible load. Besides, the results in this thesis can provide as reference for maintenance and replacement of devices and facility, which raises system dependability, and minimizes losses in the shutdown of uninterruptible loads. To verify the feasibility of propose method in this thesis, this thesis analyzes dependability of distribution system on distribution substation as a case study.

並列關鍵字

Reliability Block Diagram ； Fault Tree Analysis(FTA) ； Power Distribution System ； Critical Device ； Failure Rate

參考文獻

[7] R. N. Allan and M. G. Da. Silva, “Evaluation of Reliability Indices and Outage Costs in Distribution Systems,” IEEE/PES 1994 Summer Meeting San Francisco, CA, July 1994, pp.94.

[8] M. T. Chao and J. C. Fu, “Survey of Reliability Studies of Consecutive-k-out-of-n: F & Related Systems,” IEEE Transactions on Reliability, Vol. 44, No. 1, March 1995, pp. 120-127.

[9] IEEE Recommended Practice for the Design of Reliable Industrial and Commercial Power Systems, IEEE Std. 493, 1997.

[10] IEEE Recommended Practice for Industrial and Commercial Power Systems Analysis, IEEE Std. 399, 1997.

[14] Elsay A. Elsayed, Reliability Engineering, Addison Wesley, USA, No. 1, June 1996.

國際替代計量

用於工業配電系統可靠度分析之關鍵性元件搜尋研究

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