本論文探討液化天然氣接收站之生產製程及電力負載特性，並根據製程的電力需求及運轉特性，說明接收站的供電及配電系統設計與規劃要點。本文採用電機暫態分析程式（ETAP），來模擬分析接收站之50Hz系統配電設計，包括故障電流、負載潮流、大馬達啟動及暫態穩定度等。根據分析結果，檢討修正初步配電設計。並且提出改善方案以提升配電系統品質，目標包括有；
(1) 電力潮流計算：以三相電力潮流分析程式解出系統匯流排電壓大小、角度、負載功率、支路電流及支路功率等。
(2) 三相短路故障電流計算：計算方法以IEC 標準為主，除了計算汽電共生廠電力系統的最大故障電流，並且研究如何抑制分散式電源所提供的故障電流、以及對設備選擇之影響。
(3) 大馬達啟動壓降計算：分析大馬達啟動期間，電源匯流排電壓瞬間變化的情形。並透過降壓啟動設備的應用，模擬與改善電壓變動量在系統額定電壓之-15%到+10%間。
(4) 自動卸載策略：以低頻電驛建構卸載策略，避免電力系統總發電量與負載需求間不平衡時，系統頻率與電壓持續下降。以暫態穩定度分析模擬負載卸載的動作，讓系統頻率與電壓回復至正常運轉範園。
本論文可提供做為在配電系統規劃分散式電源時的參考依據。分散式電源的設計，對線路損失及電壓降有部份的改善效益。增加的短路電流可藉著變壓器或限流器等應用來抑制其大小，降低設備短路容量。同時完善的自動卸載規劃，可增加供電可靠度。

The purpose of this paper is to investigate the manufacture and power load characteristic in LNG Received Terminal. Also to illustrate how to design and plan the power supply and distribution system based on LNG process requirement. This paper uses Electrical Transient Analysis Program (ETAP) to simulate power system, including short circuit, power flow, motor starting, and transient stability. The simulating result is applied to review and revise the initial distribution design but also help provide improvement schemes. The desiresd goals include,
(1) Load flow: using three-phase power flow program to calculate the bus voltage magnitude, angle, branch current and power flow.
(2) Fault current: The calculation method is based on IEC standard, not only calculate the maximum fault current of proposed system, but also study how to restrict the fault current from dispersed generation.
(3) Large motor starting: To analysis the bus voltage magnitude during large motor starting. And through the application of startup devices to improve the bus voltage variation within -15% to +10%.
(4) Load shedding: Using low-frequency relay to build up load shedding scheme. In order to ensure power system operating in normal situation, this paper actually simulates load shedding program by transient stability analysis to confirm the frequency and voltage can recovery from automatic load shedding.
This paper is a good reference and example for design of dispersed generation system. It shows the benefit of less loss, voltage drop and how to restrict the fault current from dispersed generation. Satisfied load shedding program also makes sure of high reliability.

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