電力系統即時調度與分析技術之研究__臺灣人文及社會科學引文索引資料庫

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題名：	電力系統即時調度與分析技術之研究
作者：	巫俊慶
作者(外文)：	Wu,Chun-Ching
校院名稱：	國立彰化師範大學
系所名稱：	工業教育與技術學系
指導教授：	黃維澤姚凱超
學位類別：	博士
出版日期：	2017
主題關鍵詞：	分散式能源；微電網；經濟調度；多區域；直接搜尋法；線性規劃；分散式電源；最佳調度；母線電壓；靈敏因子；牛頓-拉法森法；動態規劃；最佳路徑；即時應用；Distributed Energy Resources；Microgrid；Economic Dispatch；Multi-Area；Direct Search Method；Linear Programming；Distributed Generation；Optimal Dispatch；Bus Voltage；Sensitivity Factors；Newton–Raphson Method；Dynamic Programming；Optimal Path；Real-Time Application
原始連結：	連回原系統網址
相關次數：	被引用次數:期刊(0) 博士論文(0) 專書(0) 專書論文(0) 排除自我引用:0 共同引用:0 點閱:1

摘要
在包含微電網的電力系統中，尤其是配電變電所等級的微電網，因饋入與逆送大量的電力潮流對於電力系統影響甚鉅。因此電力調度變得更為複雜，而且要找到一個最佳的解決方案是困難的。本論文提出分為三階段的最佳電力調度模型，來解決此一調度的問題。所提出的模型，將整個電力系統分為兩個部分，亦即為主要電網與微電網，根據多區域調度的基本概念來解決最佳電力調度的問題。在第一階段中，使用靈敏因子方法來解決主電力系統經濟調度的問題；.在第二階段中，藉由改良式直接搜尋法求解微電網最佳電力調度問題；在第三階段中，整個電力系統的調度則根據前兩階段的解決方案，來建立線性遞增模型，求解最佳整體電力系統最佳調度問題。本論文所提方法使用Matlab撰寫方程式，並以IEEE 14-bus和30-bus的測試系統來證實其可行性和準確性。模擬結果證明提出的方法，可適用於求解此一電力系統經濟調度問題。
此外，本論文亦提出一簡單且有效率的方法，適合求解中壓微電網含不同類型的分散式電源之最佳電力調度問題，這些不同類型的分散式電源之燃料成本係由二次函數與線性函數所組成，故不適用傳統拉格朗日乘數法做電力系統經濟調度，因而提出直接搜尋法求解微電網在併網運轉與自主運轉情況下之最佳經濟調度，模擬結果證明所提出的直接搜尋法為一簡單且適用於中壓微電網之最佳電力調度。
最後，本論文提出一基於靈敏因子的母線電壓大小和相位角快速求解方法，透過動態規劃下得到最佳路徑解進而求解母線電壓，所提的方法，首先以賈可比分佈因子法計算線路電力潮流的實功率和虛功率，計算非擺動母線的的電壓大小和相位角，並透過動態規劃得到的最佳路徑解，模擬結果證明提出的方法，展現出計算快速和高準確度。

以文找文

Absrtract
The inclusion of many microgrids (MGs) in power systems, especially distribution-substation-level MGs, significantly affects power systems because of large amounts of import and export power flows. Consequently, power dispatch has become complicated, and finding an optimal solution is difficult. In this study, a three-stage optimal power dispatch model is proposed to solve such dispatch problems. In the proposed model, the entire power system is divided into two parts, namely, main power grid and MGs. The optimal power dispatch problem is resolved on the basis of multi-area concepts. In stage I, the main power system economic dispatch (ED) problem is solved by sensitive factors. In stage II, the optimal power dispatches of the local MGs are addressed via an improved direct search method. In stage III, the incremental linear models for the entire power system can be established on the basis of the solutions of the previous two stages and can be subjected to linear programming to determine the optimal reschedules from the original dispatch solutions. The proposed method is coded by using Matlab and tested by utilizing IEEE 14-bus and 30-bus test systems to verify its feasibility and accuracy. The simulation results demonstrated that the proposed approach can be used for the ED of power systems with MGs as virtual power plants.
Furthermore, this dissertation proposes a simple and efficient approach for the optimal dispatch in a medium-voltage microgrid with various of DGs. The fuel costs generated by these DGs are determined using quadratic and linear functions dependent on the types of DGs. Instead of using the traditional Lagrange multiplier method for power system economic dispatch, the proposed direct search method (DSM) approach is able to handle several inequality constraints without introducing any multipliers, and furthermore it can solve the non-derivative problems or the fuel cost functions being much more complicated. Accordingly, the DSM can determine the optimal dispatch of MGs with various types of DGs and can minimize generation costs under grid-tied and autonomous operations. The simulation results demonstrate that the proposed DSM is a highly suitable and simple approach for the determination of the optimal dispatch in medium-voltage MGs with various types of DGs.
Finally, the calculation of bus voltage magnitudes and phase angles is a challenging task in real-time applications for power systems. The voltage profile, which denotes the present conditions of a power system, is determined by executing the traditional AC power flow program or by searching the supervisory control and data acquisition system. The AC power flow program is not suitable for several real-time applications, such as contingency analysis and security control calculations, because of complexity and convergence problems. Fast computation is the major concern in such applications. In this dissertation, a new method based on sensitivity factors, referred to as Jacobian-based distribution factors (JBDFs), is proposed for calculating bus voltage magnitudes and phase angles. This method requires setting up JBDFs and deriving optimal solution paths of bus voltage for non-swing buses through dynamic programming under base-case loading conditions. Under real-time conditions, the proposed method initially calculates real and reactive power line flows via JBDFs, and then computes the voltage magnitudes and phase angles of non-swing buses through the derived optimal solution paths. The excellence of the proposed hybrid calculation method is evaluated through IEEE test systems. Simulation results demonstrate that the proposed method exhibits fast computation and high accuracy.

以文找文

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