메뉴 건너뛰기
.. 내서재 .. 알림
소속 기관/학교 인증
인증하면 논문, 학술자료 등을  무료로 열람할 수 있어요.
한국대학교, 누리자동차, 시립도서관 등 나의 기관을 확인해보세요
(국내 대학 90% 이상 구독 중)
로그인 회원가입 고객센터 ENG
주제분류

추천
검색

논문 기본 정보

자료유형
학위논문
저자정보

김준범, 金浚凡 (조선대학교, 조선대학교 대학원)

지도교수
최효상
발행연도
2017
저작권
조선대학교 논문은 저작권에 의해 보호받습니다.

이용수6

표지
AI에게 요청하기
추천
검색

이 논문의 연구 히스토리 (2)

초록· 키워드

오류제보하기
Demand for power of the electricity is increasing worldwide as well as domestic demand. Currently most of the equipment that people use in normal is electric devices and the usage is increasing steadily because of the superiority and convenience of electricity. In recent, by the global warming, heating and cooling facilities are increasing every year. Moreover, new technologies such as smart-phone and EVs are also actively developing as new technologies. Due to the increase in power demand, it is urgent to establish countermeasures for power supply. There is a way to increase the unclear power generation or thermal power generation, which is responsible for the existing base development. However, it causes environmental pollution. In order to meet the demand, research and development of renewable energy sources such as solar or wind power is highly available. Most of the new renewable energy sources attempt to supply power to the system in a distributed power supply system form.
Distribution power system refers to small power generation facilities utilizing new renewable energy sources to increase the simplicity and efficiency in the power systems across regions or networks. This is evaluated as a system with significant possibilities in terms of effectiveness and universality and environmental aspects. However, it is essential to secure the interruption technologies to ensure the actual application of the distributed power system. In the case of distributed power sources, the power is applied in various directions. And if the fault occurs, the fault current could generate with a overlap of various power, and it may cause a severe affect to the devices or the entire grid. Besides, most of the new renewable energies are generated in direct current. DC does not have a current zero. Therefore, in interruption operation in DC, it causes a large arc. If an unexpected arc occurs, the possibility of breaker failure will increase and it may damage circuit breaker and the contacts of it. For these reasons, DC interruption technology should be preceded by a priority to construct a stable distributed power system[1-3].
Electromagnetic transient for DC/PSCAD (EMTDC/PSCAD) program, power system analysis program, has conducted for simulation. This is made by Manitoba HVDC Research Center in Canada to analyze the DC transmission system based on CAD[4].
This paper suggests a superconducting DC circuit breaker that combines superconductor and mechanical dc circuit breaker. The superconductor is a limiting factor in the event of a fault. It limits the fault current by the quench characteristics of the superconductor. After the limitation operation, the limited fault current will flow into mechanical circuit breaker and it conducts a interruption operation. To demonstrate the superiority of the superconducting DC circuit breaker, it was applied to a single circuit to analyze the operational characteristics of the superconducting DC circuit breaker. To assure operability of the operation of the superconducting DC circuit breaker in MVDC distributed power system, grid-connected PV distributed system was applied to compare the operating characteristics.

목차

Ⅰ. 서론········································································1
Ⅱ. 연구배경··································································3
A. 국내 현황 ·······································································3
1. 수요 및 발전 현황···························································3
2. 분산 전원 ····································································6
B. 분산 전원 시스템······························································8
1. 분산전원 연계의 구조 ·····················································8
2. 분산전원 연계의 문제점···················································9
C. 차단 기술 제안································································10
1. DC 차단 기술·······························································10
2. 초전도 DC 차단기 제안···················································11
Ⅲ. 초전도 DC 차단기 설계 및 독작 특성·······················12
A. 초전도 DC 차단기 구조 및 동작 매커니즘···························12
B. 초전도 DC 차단기 설계···························································13
1. 한류부 설계 ··································································13
2. 차단부 설계···································································16
C. 초전도 DC 차단기 동작특성 ················································20
1. 직류 차단 특성································································20
Ⅳ. PV시스템에 적용된 초전도 DC 차단기 동작특성·········24
A. 계통연계형 분산전원 PV 시스템 설계 및 동작특성···············24
1. PV 분산전원형 시스템 설계··············································25
2. PV 분산전원형 시스템 동작 및 과도 특성 ·························32
B. 초전도 DC 차단기 동작 실험·············································35
1. PV 분산전원 시스템 내 초전도 DC 차단기 특성 분석·············35
C. 고찰················································································41
Ⅴ. 결 론········································································42
참 고 문 헌············································································43

최근 본 자료

전체보기

댓글(0)

0