Abstract
台灣西部走廊高速鐵路預定於民國九十二年商轉，由於其列車的牽引馬達 係以電力電子驅動，馬達之用電甚鉅且變動頻繁，可能造成台電系統的諧 波失真、電壓變動及不平衡等電力品質問題。責任分界點短路容量的變動 ，對高鐵諧波管制等級及電壓變動影響甚鉅。責任分界點短路電流值與該 點所引接的發電機組及輸電線路有關。本論文針對民國九十二年台電系統 發電機組及輸電網路進行研究。分析各高鐵變電站及其引接之台電變電所 的短路電流值，前者假設高鐵電源線為非自備線路，後者假設高鐵電源線 為自備線路。針對各高鐵變電站，本論文評估短路電流值對諧波及電壓變 動管制容許值之影響。在諧波方面，針對三相不平衡條件下，考量變電站 主變壓器不同接線方式，探討適用之諧波管制等級。並就任一高鐵變電站 ，分析正常及轉供模式下，實際注入台電系統的諧波。分析結果顯示：各 列車在不同運轉模式下，注入於台電系統的諧波電流雖有相互之影響；但 對於責任分界點總和諧波失真率則無影響。對於電壓變動，本論文針對高 鐵牽引列車運轉模式，分析對於責任分界點電壓變動之影響。瞭解影響電 壓變動的原因主要為列車之啟動、加速模式，其次為正常煞車，最後始為 緊急煞車模式。本論文即針對牽引列車啟動、加速之各運轉控制模式進行 分析。依據最小短路電流值及高鐵各變電站之最大負載，估計高鐵各變電 站最嚴重之電壓變動率。 Due to the frequent stop-and-go of the trainsets and the large number ofmotors involved, High Speed Railway (HSR) systems have always present a powerquality challenge to the utility companies. Taiwan's High Speed Railway (HSR)System is estimated to enter into commercial operation in 2003. As such, thispaper presents a detailed analysis on the impact that HSR system will have onthe power quality of Taiwan's power grid.Since the short- circuit capacity (SCC) at the duty point between the HSR and the TPC system will largely deter mine the degree of impact that HSR load willhave on the TPC system, this thesis first starts with a detailed analysis of the SCC at the 7 duty points using TPC's 2003 network configuration.When the SCC at the 7 duty points have been determined, the TPC control levelon the harmonics and voltage fluctuation can also be determined. This thesis then analyzes the harmonic injection and voltage fluctuation caused by HSR under various operating conditions and compare the results with TPC regulat-ions. Improvement suggestions are also provided whenever the control level is exceeded.