Expansion double-electrode direct current transmission system
A direct current transmission system, direct current technology, applied in the direction of power transmission AC network, etc., can solve the problems of unfavorable practical application, extra power consumed by resistors, etc., and achieve good economical and engineering applicability
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[0048] In order to describe the present invention in more detail, the technical solutions and related principles of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
[0049] Such as image 3 As shown, an extended bipolar DC transmission system includes: a rectifier converter station, a rectifier-side current conversion unit 9, a three-pole transmission line 6, an inverter-side current conversion unit 10, and an inverse conversion station; among them:
[0050] The rectifier converter station is used to convert the three-phase AC power of the sending-end AC power grid 1 into bipolar DC power; the rectifier converter station includes an AC bus L1 and a twelve-pulse bridge thyristor connected to the AC bus L1 through two converter transformers 4 Inverter 5, the AC bus L1 is connected to the sending end AC grid 1;
[0051] The twelve-pulse bridge thyristor converter 5 uses such Figure 4 The topological structure...
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