利用效率排序演算法分析汽電共生系統最適運轉研究

OPTIMAL OPERATION FOR COGENERATION SYSTEM BY SORTED TABLE ALGORITHM

簡慧菁(Hui-ching Chien)

指導教授 ： 陳斌魁

大同大學/電機資訊學院/電機工程學系所/碩士(2009年)

摘要

本研究針對某具有背壓式蒸汽渦輪機與抽汽冷凝式汽渦輪機混合運轉的汽電共生廠，在滿足廠內高壓、中壓製程蒸汽需求及電力需求下，考慮時間電價的變化，提出效率排序演算法（Sorted Table Algorithm）以求得各鍋爐及發電機組之最佳運轉模式，期能達到降低運轉成本與節約能源之目的。
效率排序演算法（Sorted Table Algorithm）採用equal lambda觀念，將機組成本曲線微分後取分段線性近似，再根據各分段點為轉折點，累積轉折點之負載量建立對照表，直接由系統目標負載量對應到系統之遞增成本，再推算機組的運轉狀態及負載量，無須疊代運算，可減少運算時間，快速求解。效率排序演算法的另一優點在於計算過程中不需考慮收斂寬限度，因此不會因數值振盪而不收斂；因此只要有解必能找到結果，為一種系統化的求解方法。
本文以一汽電共生系統為實例，驗證所提方法為實際可行。

關鍵字

汽電共生 ； 效率排序演算法

並列摘要

The main purpose of this thesis is to find the optimal operation strategy for cogeneration systems with back-pressure and extraction turbines by using “Sorted Table Algorithm”. The primary requirement of the strategy is to meet process steam demand and to satisfy the time-of- use rates and all related operation constraints to reduce production costs and save energy.

The main idea of Sorted Table Algorithm is equal lambda. A table is composed of the composite loading and the break points from connecting points of the piecewise linearization with the incremental curve of units. The incremental cost of system is corresponded to composite loading and then the state and loading of units would be estimated without recursive calculation; further more, there is no tolerance considered. Therefore, this would be a system method. A real cogeneration system will be used as an example to verify the proposed scheme.

並列關鍵字

Cogeneration ； Sorted Table Algorithm ； equal lambda

參考文獻

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