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題名 | Design, Implementation and Field Tests for Performance Evaluations of a Brand-new Phasor Measurement Unit Based on Global Positioning System=以全球衛星定位系統為基礎之嶄新的高性能同步相量量測器之設計、製作、與現場實測評估 |
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作者 | 塗同銘; 江昭皚; 楊俊哲; 林穎宏; 劉志文; | 書刊名 | Journal of the Chinese Institute of Electrical Engineering |
卷期 | 8:2 2001.05[民90.05] |
頁次 | 頁103-118 |
分類號 | 440.98 |
關鍵詞 | 同步相量量測器; 全球衛星定位系統; 離散式傳立葉轉換; 全球同步時脈產生器; 頻率估測; Phasor measurement unit; PMU; Global positioning system; GPS; Discrete fourier transforms; DFT; Global synchronism clock generator; GSCG; Frequency estimation; |
語文 | 英文(English) |
中文摘要 | 在本文中,提出一種嶄新的同步相量量測器(Phasor Measurement Unit, PMU)設計。使用全球衛星定位系統 (Global Positioning System, GPS) 所提供的精確時間同步訊號做為 PMU 的計時基準,可大幅地提高同步量測的準確度及降低設備成本。然而GPS提供的同步時間訊號頻率為1 Hz,不能直接做為量測取樣訊號所用,故本論文設計一全球同步時脈產生器電路,以做為所研製之同步相量量測器的時脈基準,能使不同量測器每一次的資料取樣時差小於1μ以內。在本文中,亦同時提出一種離散式傳立葉轉換演算法並將之內建在同步相量量測器內,以便能消除量測時訊號雜訊、諧波、直流偏移、及量測裝置本身誤差的影響,進而擷取出精確的系統基頻相量與系統頻率以為電力系統狀態監測、控制、保護工作之用。兩部同步相量量測器原型機於臺電161千伏系統現場實測結果顯示,其間相位的同步精確度甚至可達0.3042度。藉由分析兩部量測器於實驗室及現場實測量測結果,驗證出本論文所研製的同步相量量測器及全球同步時脈產生器電路架構確實能符合即時運算、精確、以及同步的要求。 |
英文摘要 | A description of two prototypes of laboratory developed Phasor Measurement Units (PMUs) is presented. Due to availability of time synchronism in Global Positioning System (GPS), the synchronized PMUs can real-time measure voltage and current phasors from substations in real time and thereby open up new possibilities for power system protection and control. The PMU's are also equipped with a new timing device named "Global Synchronism Clock Generator, GSCG". The GSCG's hardware and software design is also developed. Experimental results show that the synchronized error of the rising edge between two GSCGs' clocks is well within 1μs when the clock frequency is below 2.499 MHz. This paper also proposes a new Discrete Fourier Transform (DFT) based algorithm (termed as Smart Discrete Fourier Transform, SDFT) that has been built into the PMUs to eliminate system noise, harmonics, dc-offset and measurement errors such that extremely accurate fundamental frequency components are true system frequency can be extracted for system monitoring, protection, and control applications. The measurement results between Chung-Jeng and Chang-Te 161 kV substations of Taiwan Power Company by PMUs equipped with GSCGs are presented. Field tests show that the synchronization accuracy of the newly designed PMUs acan achieve even up to 0.3042°. An examination of the field test results indicates that the new PMUs meet the real time calculations and precise synchronization requirements. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。