頻率的良窳反應出系統安全性與可靠性。對於電力系統運轉而言，負載頻率控制(LFC)的研究是不可缺少的部分。一般而言，大部分的電力公司採用自動發電控制(AGC)，以維持系統的供電平衡並穩定系統頻率。LFC效能的好壞取決於電力公司使用AGC的方式，本文提出AGC三項參考效能指標，分別為CPS1、運轉成本與備轉餘裕量，用以評估電力系統運轉的品質。相關的研究方法是利用MATLAB/ Simulink軟體建構出數學模型，以近似台電系統的LFC動態特性。由台電公司實際的系統參數與負載資料，可模擬不同的AGC模式對參考效能指標的重要影響。最後，利用多因素評分優選法找出適合的系統運轉建議，以期望電力調度員在LFC運作上能有更好的成效。

The supply frequency reflects system security and reliability in the operation power system. The load-frequency control (LFC) is an indispensable study in the system research. In general, most utilities adopt automatic generation control (AGC) to make load-generation balance and thus stabilize the frequency. The performance of the LFC is highly dependent on the way of the utilities making use of the AGC. In this thesis, we propose three referred performance indices of AGC — CPS1, operating cost and reserve margin, respectively, to evaluate the quality of system operation. Relative research method is to use MATLAB/Simulink software to construct a mathematical model to approximate the LFC dynamics of the Taipower system. Taking the real system parameters and load information from Taipower, the simulation program can simulate various AGC modes that have significant influences on the referred performance indices. Finally, a multi-factor score optimization method is utilized to find out the recommended operating portfolio for system operators to make smarter decisions in the LFC.

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