台灣電力防衛系統之研究

A Study on Taiwan Power Defense System

汪以仁(Yi-Jen Wang)

指導教授 ： 劉志文

國立臺灣大學/電機資訊學院/電機工程學研究所/博士(2007年)

https://doi.org/10.6342/NTU.2007.02132

摘要

摘 要
本論文提出一基於相量量測單元(PMU)的台灣電力防衛系統，來防止電力系統因一連串的保護電驛跳脫事故而造成電力系統崩潰。
在一個中央電腦控制中心，使用 PMU 監控電力系統中主要的發電機組以及超高壓輸電線，並且提供預測電力系統不穩定與否及防衛策略之演算法，來避免保護電驛的連續跳脫事故而造成的電力系統崩潰。當故障發生時，我們將所有一同搖擺發電機構成同一群，進而簡化成單機無限匯流排系統。並即時估測單機無限匯流排系統的參數，防衛策略是以保護電驛設定限定等面積法則(Relay Setting Limited Equal Area Criteria)來決定其控制行為的執行時機與矯正量的多寡，其中矯正行為包含負載卸載以及發電機跳機，。
此電力防衛系統是以台電系統來做為建構與測試對象，模擬狀況為台電系統在主要的超高壓輸電線有嚴重的事故，並且引起一連串的電驛跳脫時，而導致類似1999年七月二十九日台灣北部及中部大停電情形。電腦模擬結果顯示，若台電公司有此套電力防衛系統，則1999年之729大停電事件將不會發生。

關鍵字

相量量測單元(PMU) ； 單機無限匯流排系統 ； 電力防衛系統 ； 保護電驛設定限制等面積法則(Relay Setting Limited Equal-Area-Criterion, REAC) ； 729事故 ； 大停電

並列摘要

Abstract
This dissertation proposes a phasor measurement units (PMUs) based power defense system to prevent power system blackout due to a cascading relay trip events..
The power defense system uses PMU’s to monitor the generators and the major EHV transmission lines of a power system, and apply an instability prediction algorithm for initiating the remedial control actions to avoid a sequence of relay trip events whenever necessary. When a fault happens, the power defense system group the generators swinging coherently and reduce the system to One-Machine-Infinite-Bus (OMIB) system equivalent. Then using real-time phasor measurements estimates the parameters of OMIB. The strategy for determining the timing and amount of remedial control actions is a proposed relay setting limited equal-area criterion for OMIB. The remedial control actions consist of load shedding and generation tripping.
The proposed scheme is tested with Taiwan power system, which experienced a severe fault at a major EHV and caused a successive relay trips resulting in system north and center area blackout on July 29,1999(729-event). According to the computer simulation results, if the Taiwan power system had implemented the power defense system then the blackout of 729-event could be avoided.

並列關鍵字

Phasor Measurement Unit (PMU) ； One Machine Infinite Bus(OMIB) ； Power Defense System ； Relay Setting Limited Equal-Area Criterion(REAC) ； 729-event ； Blackout

參考文獻

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