석유시추선의 전력계통 설계 및 해석

다국어 초록 (Multilingual Abstract)

As electricity has been used in ship's propulsion, it is necessary to increase the system voltage and current for the electrical distribution system. So it is required to improve the system safety and efficiency, the power stability, the efficiency of the generation through various analysis of ship's electric power system. In this paper, the electrical service reliability of the power distribution system of Semi Submersible Drilling Rigs(SSDRs) has been analysed and discussed using Electrical Transient Analysis Program(ETAP).
In the case of Semi Submersible Drill Rigs that are being used in most of the deepwater drilling operations, it can move by thrusters with Dynamic Positioning System(DPS), and has equipped a drilling packages like pumps, pipes and drills.
The electrical distribution system of Drilling rigs is quite similar to typical redundancy system of electric propulsion ships made for transportation. However it is required the electrical distribution system of 2 to 4 split bus or more because of the severe marine environment, the hazards of fire and explosion, 24-hours operation, the standards and regulations related to oil and gas drilling. There are some more difficulties in design and engineering of the off-shore plants electric power system because it is required more severe and strict conditions.
In this paper, to verify the stability of designed power system, the power system of SSDRs is modeled at first and load flow is analysed on each operational mode and also analysed on transient characteristics due to start/stop action between generators and loads. On the basis of the analysis the voltage variation in the distribution feeder is discussed.
As a result, the load flow analysis shows the resonable result with appropriate load distribution and the capacity of generators and transformers are enough to feed the maximum load. The capacity of generators and transformers have an acceptable margin for future load and emergency load.

목차 (Table of Contents)

• 1. 서 론 1
• 1.1 연구배경 및 동향 1
• 1.2 연구목적과 구성 1
• 2. 석유시추선의 전력계통 3
• 2.1 전력계통의 구성 3
• 2.1.1 시추선의 기준 모델 5
• 2.2 부하의 구성 6
• 2.3 운전 모드 6
• 2.3.1 이동 모드 7
• 2.3.2 시추 모드 1 7
• 2.3.3 시추 모드 2 8
• 2.3.4 리밍 모드 8
• 3. 전력계통의 해석 9
• 3.1 전력조류방정식 9
• 3.2 뉴턴-랩슨(Newton-Raphson)법 15
• 3.3 발전기 모델 17
• 3.3.1 여자기(Exciter) 20
• 3.3.2 조속기(Governor) 23
• 3.3.3 발전기 운전정보 26
• 3.4 변압기 모델 33
• 3.4.1 2권선 변압기 34
• 3.4.2 3권선 변압기 35
• 3.4.3 변압기 운전정보 37
• 3.5 전동기 모델 41
• 3.5.1 유도전동기 41
• 3.5.2 유도전동기 운전정보 45
• 3.6 Lumped load 47
• 4. 전력조류 시뮬레이션 및 결과 49
• 4.1 분석조건 및 기준 49
• 4.1.1 분석조건 49
• 4.1.2 분석기준 49
• 4.2 분석결과 50
• 4.2.1 모선의 운전전압 50
• 4.2.2 변압기 여유율 52
• 4.2.3 운전 모드별 전력조류 53
• 5. 비상시 전력계통해석 58
• 5.1 발전기 및 부하의 탈락 59
• 5.1.1 추진부하의 탈락 59
• 5.1.2 발전기 1대의 탈락 69
• 5.1.3 발전기 2대의 탈락 76
• 5.1.4 고압모선의 3상 단락 80
• 5.2 단락전류계산 85
• 5.2.1 단락전류계산 85
• 5.2.2 고장유형 88
• 6. 결 론 93