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In the typical HVDC power system, the current transformers (CTs) between the Y-delta converter transformer and the converter bridge is located in the delta-winding of the transformer. Under such condition, the measuring current of these CTs includes the zero-sequence circulating current of the delta-winding. In the case of the adjacent transformer energization or the fault of AC system, the zero-sequence...
This paper analyses the mechanism of the sympathetic inrush current of the converter transformer of the HVDC transmission system. The impacting factors of the sympathetic inrush current, including the system impedance, the closing angle and the initial remnant flux of the incoming transformer, and the operating condition of the HVDC system and so on, are analysed utilizing on the PSCAD/EMTDC soft...
This paper has carried out a research on the user-defined modeling of the trigger control module of HVDC converter based on ADPSS/ETSDAC simulation platform is carried out in this paper. A detailed digital simulation model is also constructed. Firstly, an electromagnetic transient simulation model of the HVDC primary system is put up on the ADPSS/ETSDAC simulation platform. On this basis, user-defined...
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