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Development of a thyristor valve for next generation 500 kV HVDC transmission systems

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6 Author(s)
Hasegawa, T. ; Kansai Electr. Power Co. Inc., Osaka, Japan ; Yamaji, K. ; Irokawa, H. ; Shirahama, H.
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A high voltage thyristor valve is the basic component of an HVDC transmission system. Development of a 500 kV valve for next generation HVDC transmission systems is described. First, the power loss of the valve is analyzed to decide a reasonable wafer size for the light-triggered thyristor. From these results, a six inch diameter wafer size is selected. A light-triggered thyristor, with ratings of 8 kV and 3.5 kA, is developed using the six inch wafer. The design of the valve employing the thyristor and test results with a prototype valve prove that a 500 kV valve can be realized by this design method

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Power Delivery, IEEE Transactions on  (Volume:11 ,  Issue: 4 )