[仿真]Distance Protection Scheme with Travelling Wave

Abstract--The ultra high voltage direct current(UHVDC) is <VgnrqF6:  
the important technical means for the solution of high voltage, `wk#5[Y_  
large capacity, and long distance power transmission. ±800KV cB?HMLbG>  
UHVDC transmission technology will be used in the projects t;y>q  
which transfer hydroelectric power in Yunnan Province and Y Xn)?  
Jingshajiang river to Guangdong Province and Shanghai and H;IG\k6C  
other places in China. Along with the rapid development of *K m%Vl  
UHVDC in China , how to improve the security and reliability !:e}d+F  
of the running of UHVDC system has become an urgent thing. H!oP!rzEo  
Travelling wave protection is the main protection for HVDC atW;S99#  
link. So it is necessary for us to study Travelling wave ,{:5Z:<|  
protection for UHVDC link. In this paper, the circuit of ds7I .Q'  
UHVDC transmission is given out. The parameters for ZH~m%sA  
different electric equipments, such as converter transformer, B6=8cf"i  
converter, electric line, reactor, filter are given out. The 5=Gq d4&*  
travelling wave protection theory is discussed in this paper,too. #
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The PSCAD program is used to simulate the UHVDC qZA?M=NT?  
transmission system. We have the simulation result and draw n*b
bmG1  
the co .. UY)YhXW  
H#wn3O  

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