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| 研究生： |
侯丞冠 Cheng-Guan Hou |
|---|---|
| 論文名稱： |
快速偵測發生於智慧電網中的電力品質事件 Quickest detection for power quality event in smart grid |
| 指導教授： |
林士駿
Shih-Chun Lin |
| 口試委員: |
鍾偉和
Wei-Ho Chung 張縱輝 Tsung-Hui Chang |
| 學位類別： |
碩士 Master |
| 系所名稱： |
電資學院 - 電子工程系 Department of Electronic and Computer Engineering |
| 論文出版年： | 2014 |
| 畢業學年度： | 102 |
| 語文別： | 中文 |
| 論文頁數： | 32 |
| 中文關鍵詞： | 快速偵測 、電力品質 、智慧電網 、採取隨機分組方式的快速偵測演算法 |
| 外文關鍵詞： | quickest detection, power quality, smart grid, randomized group-wise quickest detection algorit |
| 相關次數： | 點閱：218 下載：2 |
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在本論文中，我們的研究專注於盡可能的以最快的速度偵測發生於智慧電網中的電力品質事件。在多個感測器的情況中，每個感測器會傳送信號至匯集信號中心後並做出最後的決策。因為電力消耗的因素，我們限制了每個感測器至匯集信號中心的頻寬只有1位元，而且在實際應用中，部分感測器可能會有損壞的問題發生，對此情況我們提出了一個採取隨機分組方式的演算法。首先，每個感測器選擇一個適當的時間對發生電力品質事件後的電壓波型做取樣並獲得其機率分佈資訊，每個正常感測器會運用所得的機率分佈資訊做CUSUM (Cumulative sum)演算法並傳送相對應的二進制判定信號給匯集信號中心做最後的決策。為了對抗損壞感測器所傳送的錯誤判定信號問題，匯集信號中心在執行最後決策前會先對所有判定信號進行隨機的分組。在我們模擬部分可以得知我們所提出採取隨機分組的偵測演算法會比採取固定分組的偵測演算法有更短的偵測延遲時間。
In this thesis, we focus on the quickest detection problems for detecting the power quality (PQ) events in smart grids as soon as possible. Multiple sensors will send signals to a fusion center to do the final decision. The bandwidth between each sensor to the fusion center is constrained to be only 1 bit to save the power consumption. However, in practice, some of the sensors may be faulty and we propose a randomized group-wise quickest detection algorithm for combating them. First, the post-PQ-event distribution for each sensor is obtained from proper sampling the continuous post-event waveform. With this distribution, each non-faculty sensor will perform the CUSUM (Cumulative sum) operation and the corresponding binary decision signal is send to the fusion center. To combat the faulty signals, the fusion center will group these signal randomly before performing the final decision. Our simulation results show that our randomized group-wise detection algorithm have smaller detection delay compared with the non-randomized one.
http://energymonthly.tier.org.tw/report/201109/10009.pdf
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