Topological structure of hybrid direct-current power transmission system based on auxiliary power supply and starting method
A technology of auxiliary power supply and power transmission system, which is applied in the direction of power transmission AC network, electrical components, output power conversion device, etc. The effect of reducing shock, prolonging service life and protecting power equipment
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[0022] Such as figure 1 is the topology diagram of the entire hybrid DC power transmission start-up system, where 1 is the two-terminal AC system, 2.1 is the first AC circuit breaker, 2.2 is the second AC circuit breaker, 2.3 is the second AC circuit breaker, and 3.1 is the first converter transformer, 3.2 is the second converter transformer, 3.3 is the third converter transformer, 3.4 is the fourth converter transformer, 4 is the AC filter, 4.5 is the converter reactor, 5 is the VSC converter, 6 is the LCC converter , 7 is a stabilizing capacitor, 8 is a DC circuit breaker, 9 is a DC filter, 10 is a smoothing reactance, 11 is a starting power supply, and 12 is an uncontrolled rectification circuit.
[0023] figure 2 , 3 They are the basic control block diagrams of the VSC converter on the rectification side and the LCC converter on the inverter side, respectively. Among them, the VSC converter adopts the d-q decoupling direct current control method to determine the tran...
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