Journal
IEEE TRANSACTIONS ON POWER ELECTRONICS
Volume 37, Issue 5, Pages 4931-4936Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPEL.2021.3129655
Keywords
Thyristors; Bridge circuits; Topology; Circuit faults; Voltage; Insulated gate bipolar transistors; HVDC transmission; Commutation failure (CF); high-voltage direct current (HVdc); integrated gate commutated thyristor (IGCT); line commutated converter (LCC); thyristor
Categories
Funding
- Integration Projects of National Natural Science Foundation of China-State Grid Joint Fund for Smart Grid [U2166602]
- National Natural Science Foundation of China [51922062]
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In this letter, a new hybrid LCC based on IGCT is proposed to effectively reduce the commutation failure probability of the line commutated converter (LCC) based high-voltage direct current transmission system. By replacing some thyristors with IGCTs, the reverse blocking IGCT can withstand bidirectional voltages and actively turn off fault currents, further interrupting the commutation failure process. Experimental results verify the effectiveness and correctness of the proposed scheme.
In order to effectively reduce the commutation failure probability of the line commutated converter (LCC) based high-voltage direct current transmission system, a new hybrid LCC based on integrated gate commutated thyristor (IGCT) is proposed in this letter. In the proposed converter, a part of the thyristors is replaced by IGCTs. Reverse blocking IGCT is capable of withstanding bidirectional voltages and actively turning off fault currents, further interrupting the commutation failure process. The topology structure, high-power device, and the operation strategy are presented. Finally, the experimental results of a 30-kV/5-kA prototype verify the proposed scheme's effectiveness and correctness.
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