Results 251 to 260 of about 1,644,928 (302)

Virtual testing of distance protection

2006 IEEE Power Engineering Society General Meeting, 2006
Distance relays are the most commonly used protection devices in transmission systems. They require testing during different stages of relay development, commissioning, maintenance, configuration and operation analysis. The paper analyses the requirements for testing of distance relays under different abnormal conditions.
A. Apostolov, H. Kang
openaire   +1 more source

Distance Protection by Digital Technique

IFAC Proceedings Volumes, 1977
Abstract This paper presents a method of distance protection by digital technique. The characteristic of mho and reactance relay is realized by the performance equation. Some performance equations are derived by different methods. One is derived from a torque equation, and other is from the vector relation, Their superiority or inferiority is ...
I. Mitani, M. Yamaura, M. Okamura
openaire   +1 more source

Feeder protection: distance systems

1995
The principle of impedance measurement and the engineering of basic impedance measuring elements into schemes of distance protection whether they be switched, nonswitched, carrier-aided etc., has always formed a very important part of power system feeder protection.
openaire   +1 more source

Distance protection under extreme conditions

10th IET International Conference on Developments in Power System Protection (DPSP 2010). Managing the Change, 2010
The phenomenon this paper looks at is power swings, voltage collapse, series compensation and the effect of shunt active VAR compensation. Power swing blocking although a well established technique in its own right; is hampered by traditional detection methods which can be compromised when the system topology changes.
H. Kang, S. Subramanian, F. Hassan, L. Yao   +3 more
openaire   +1 more source

Distance protection of unsymmetrical lines

European Transactions on Electrical Power, 1996
AbstractTechnical, economical and ecological aspects lead to untransposed power lines. Full transposition schemes are often to expensive and not applicable to short poly‐circuit lines. Therefore line unsymmetry is of importance with respect to the impedance calculation and the setting of distance‐protection relays.
H. Hupfauer, P. Schegner, R. Simon
openaire   +1 more source

A novel distance protection principle

2012 China International Conference on Electricity Distribution, 2012
The features of time difference-based traveling wave distance protection is presented first, then the basic principle of traveling wave distance protection is analyzed comprehensively. The core components, including traveling wave head extraction method and GPS timing part are analyzed in detail, using polarity information of traveling wave to ...
null Feng Peng, null Xiang-jun Zeng, null Hui Liu, null Liang Zou   +3 more
openaire   +1 more source

Distance protection of teed circuits

Proceedings of the Institution of Electrical Engineers, 1967
Multiended network interconnections, such as teed circuits, invariably pose special difficulties in their protection, and the methods of relaying that have been widely applied to plain feeders are often of limited applicability to circuits having more than two ends within the protected zone.
W.D. Humpage, D.W. Lewis
openaire   +1 more source

Zone 2 distance protection coordination with distribution feeder protection

2015 68th Annual Conference for Protective Relay Engineers, 2015
In recent years, renewable energy generators have been widely promoted in Ontario to offset their polluting counterparts. Due to connection cost of these generations, most of the renewable generation stations are connected to Hydro One transmission system at nearby HV transmission lines.
null Fenghai Sui, Miroslav Kostic, null Zhiying Zhang   +2 more
openaire   +1 more source

Fault classification for distance protection

IEEE/PES Transmission and Distribution Conference and Exhibition, 2003
This paper presents an overview of power system fault classification methods and challenges. It also contains some ideas about structured testing.
openaire   +1 more source

An Adaptive Approach in Digital Distance Protection

IEEE Power Engineering Review, 1991
Adaptive distance protection can be obtained by forming an adaptive control system, and rules about information, functions, and time sequence must followed in its design. Three adaptive methods are suggested to deal with the following problems: (1) the effect of frequency variation, (2) the effect of fault resistance in single-phase-to-ground faults ...
null Zhang Zhizhe, C. Deshu
openaire   +1 more source