A DC Traction Power Supply System Based on Flexible DC Transmission
A flexible DC transmission and DC traction technology, applied in electric traction, DC circuits can reduce harmonics/ripples, electric vehicles, etc., can solve the problem of rectifier units increasing the complexity of traction substations and affecting the reliability of DC traction power supply systems In order to achieve the effects of small ripple, lower harmonic content, and reduced voltage and power loss
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[0018] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0019] Such as figure 1 As shown, a DC traction power supply system based on flexible DC transmission of the present invention includes a step-down transformer, a double-terminal active high-voltage DC transmission system and a step-down chopper circuit. The double-ended active HVDC power transmission system includes two fully symmetrical converters, each of which is connected to the three-phase AC through a step-down transformer; the input end of the step-down chopper circuit is connected to the double-ended active The source is connected to the DC side of the high-voltage direct current transmission system, and the output end is connected to the traction system through the second switch assembly; the second switch assembly is interlocked with the third switch assembly.
[0020] see figure 1 , the first switch component is QF6, the...
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Abstract
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