期刊
IEEE ACCESS
卷 7, 期 -, 页码 145532-145545出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/ACCESS.2019.2945568
关键词
LCC-HVDC transmission; back-to-back HVDC system; reliability; 6-pulse HVDC converter; 12-pulse HVDC converter
资金
- Universiti Sains Malaysia through the Bridging Grant [304, .6316098]
Back-to-back high-voltage direct current systems are used to transfer electrical power between two asynchronous AC systems. The existing bi-pole back-to-back system (2PBTBS) can be converted into the four-pole back-to-back system (4PBTBS) to save in the required infrastructure for proposed installations. This upgrading provides four parallel 12-pulse DC circuits instead of only two 12-pulse DC circuits as in the existing 2PBTBS. The power transfer capability of each DC circuit in the proposed system is 25% of the original system capacity instead of 50% as in the existing 2PBTBS. The reliability of the proposed 4PBTBS is improved twice, and the line-to-line DC voltage levels are reduced to 50% in comparison with the existing 2PBTBS. In this study, the 4PBTBS and existing 2PBTBS are simulated using MATLAB/Simulink. Simulation result shows that the proposed 4PBTBS has four parallel 12-pules DC circuits at lower line-to-line DC voltage and higher power quality compared with the existing 2PBTBS. These results validate the performance of the proposed system obtained from upgrading the existing 2PBTBS.
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