[仿真]Distance Protection Scheme with Travelling Wave

Abstract--The ultra high voltage direct current(UHVDC) is qBZ;S3  
the important technical means for the solution of high voltage, "@rHGxK  
large capacity, and long distance power transmission. ±800KV IG~Zxn1o  
UHVDC transmission technology will be used in the projects ]PbwG  
which transfer hydroelectric power in Yunnan Province and ]-l4  
Jingshajiang river to Guangdong Province and Shanghai and milQxSpj  
other places in China. Along with the rapid development of m;S%RB^~H  
UHVDC in China , how to improve the security and reliability pE$*[IvQ'  
of the running of UHVDC system has become an urgent thing. D2zqDo<+;  
Travelling wave protection is the main protection for HVDC wkT4R\H>  
link. So it is necessary for us to study Travelling wave y|3!E>Up  
protection for UHVDC link. In this paper, the circuit of ^c|0?EH  
UHVDC transmission is given out. The parameters for jJ?G7Q5l  
different electric equipments, such as converter transformer, 0UQ DB5u  
converter, electric line, reactor, filter are given out. The P#"_H}qC*  
travelling wave protection theory is discussed in this paper,too. mFE7#OM  
The PSCAD program is used to simulate the UHVDC )4H0Bz2G  
transmission system. We have the simulation result and draw `R*!GHro  
the co .. tR_DN  
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