Journal
IEEE TRANSACTIONS ON POWER DELIVERY
Volume 31, Issue 2, Pages 789-797Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPWRD.2015.2440354
Keywords
Commutation failure; hybrid HVDC; LCC; MMC; voltage-source converter (VSC); wind farm
Categories
Funding
- China Electric Power Research Institute
- State Key Laboratory of Alternate Electrical Power System with Renewable Energy, China
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This paper presents the control and operation of a hybrid HVDC system comprising a wind farm-side voltage-source converter rectifier and a grid-side LCC inverter for integrating wind power. The configuration and operation principle of the hybrid HVDC system are described. Commutation failure in the LCC inverter during an ac network disturbance is considered and its impact on the hybrid system operation is analyzed. An enhanced control strategy for the LCC inverter at the grid side and an alternative modular multilevel converter (MMC) topology using mixed half-bridge and full-bridge modules considered for the rectifier at the wind farm side are proposed. Simulation results using Matlab/Simulink are presented to demonstrate the robust performance during LCC inverter commutation failure to validate the operation and recovery of the hybrid system with the proposed control strategy and MMC configuration.
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