This paper presents a novel current differential protection scheme for UHV/EHV transmis-sion lines. This method is based on active current component extraction using instantaneous power theory, which is also called ip-iq method, and it has been widely used in APF (active power filter). Adopt three digital PLL (phase-locked loop) to get the positive voltage’s angle and active current containing DC and AC components can be obtained by using dq transfor-mation. The average filter is employed to filter the AC active current component out. This algorithm can eliminate the influence of distributed capacity current fundamentally. Com-pared to compensation methods, it requires no heavy computation, line parameters and volt-age information transmission. Compared to other differential protection methods, it has the advantages of clear physical meaning and simple operation. Simulation results show that the novel protection method is effective and robust, providing a new perspective on transmission lines’ protection.
목차
Abstract 1. Introduction 2. Fundamental 2.1. Power Transmission Line Model and Traditional Current Differential Protection 2.2. Power Transmission Line Model and Traditional Current Differential Protection 3. Protection Scheme Using Active Current 3.1. Extraction of Active Differential Current 3.2. Criteria of Protection 3.3. Setting Principle for Criteria 4. Case Study 4.1. Model Construction 4.2. Testing of Voltage PLL 4.3. No-load Switch-on 4.4. Setting of Protection Threshold 4.5. Internal Fault 5. Conclusion References
보안공학연구지원센터(IJCA) [Science & Engineering Research Support Center, Republic of Korea(IJCA)]
설립연도
2006
분야
공학>컴퓨터학
소개
1. 보안공학에 대한 각종 조사 및 연구
2. 보안공학에 대한 응용기술 연구 및 발표
3. 보안공학에 관한 각종 학술 발표회 및 전시회 개최
4. 보안공학 기술의 상호 협조 및 정보교환
5. 보안공학에 관한 표준화 사업 및 규격의 제정
6. 보안공학에 관한 산학연 협동의 증진
7. 국제적 학술 교류 및 기술 협력
8. 보안공학에 관한 논문지 발간
9. 기타 본 회 목적 달성에 필요한 사업
간행물
간행물명
International Journal of Control and Automation
간기
월간
pISSN
2005-4297
수록기간
2008~2016
십진분류
KDC 505DDC 605
이 권호 내 다른 논문 / International Journal of Control and Automation Vol.7 No.7