當系統進行調度或維修時，配電饋線有時需實施無停電負載轉供。然而轉供饋線間分屬不同變電所、主變壓器一次側電壓等級、以及饋線負載量大小等因素，有時會造成轉供中短時間大電流，嚴重時饋線保護會動作，使斷路器跳開反造成停電。本論文即針對上述問題，利用電力模擬軟體ETAP、ASPEN、MATLAB來建立配電系統轉供的等效電路模型，並評估轉供的可行性。最後應用OLTC、電容器和相移器於抑制變電所轉供之短時間大電流，也深入分析區域輸電網路電壓分佈分析與改善方法探究SVC應用與影響。本文以板橋-樹德轄區為例，經由模擬結果顯示配電饋線轉供操作過程中的短時間高電流，會造成過電流電驛動作，尤其系統重載時更容易發生電驛跳脫，故建議無停電饋線轉供可選擇在夜間輕載或離峰時間進行或使用調整變壓器有載分接頭(OLTC)位置來調整變壓器二次側電壓大小、利用相移器來改善兩轉供變壓器間的相角差降低轉供前兩變壓器的二次侧電壓差與相角差再進行轉供，達到降低轉供中短時間大電流的效果，並提高供電可靠性。另以花東地區電力系統為模擬案例，結果顯示區域內各變電所電壓值相差甚大，利用SVC較能準確將電壓調整至理想值，且放置於轄區內電壓偏高情形較為嚴重之變電所，且該變電所不為電力網末端，補償效果較佳。

When the system requires reconfiguring or repairing, the load on one distribution feeder needs to be transferred to another feeder without interrupting. However, there are several conditions affecting the successful load transferring of distribution feeders, including type of substation, primary-side voltage of transformer, and loading of feeder. Those conditions will affect the short duration high current during feeder load transferring. If the current is too large, the feeder protection relay will be actuated to trip the circuit breaker and cause power outage. To solve above questions, this thesis will use ETAP, ASPEN, and Matlab to establish the models and study the feasibility of uninterruptable transferring of distribution feeder loads. Finally, the OLTC, capacitor and phase shifter are used to reduce the short durational high current problems. After detailed analysis of regional transmission network voltage distribution, the improvement methods by using SVC is explored.. The Bashi-Shuter area, for example, is selected in simulation to show the high current during the load transferring of distribution feeders. It is suggested to proceed the load transferring in the off-peak hours to avoiding the tripping of feeders. It is adjust the transformer taps position using OLTC to adjust transformer secondary side voltage and to used phase shifters to reduce the phase angle between the two transformers. Then it is to achieve lower short-term high-current effects, and improve supply reliability. In the simulation of the Hualien-Taitung sytem, the results show that the substation voltages in the region are great different, the SVC can tune the voltage to ideal values. The SVC should be placed in the substation with highest voltage rising. It is not suitable to placed in the end of the area.

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