Design of A Hybrid Controller Based on GA-SMC for the Multi-Terminal VSC-HVDC Transmission System

This paper explains a hybrid control approach to model a controller for voltage source converters (VSCs) in offshore wind farm (OSWF) applications, where the OSWFs are integrated to AC grid through the multi-terminal high voltage direct current (MT-HVDC) transmission system. Proper DC link voltage p...

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Bibliographic Details
Published in2018 2nd IEEE International Conference on Power Electronics, Intelligent Control and Energy Systems (ICPEICES) pp. 138 - 142
Main Authors Srikakulapu, Ramu, Vinatha, U.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.10.2018
Subjects
AC voltage control
DC voltage control
HVDC
offshore wind farm
sliding mode control
voltage source converter
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Summary:This paper explains a hybrid control approach to model a controller for voltage source converters (VSCs) in offshore wind farm (OSWF) applications, where the OSWFs are integrated to AC grid through the multi-terminal high voltage direct current (MT-HVDC) transmission system. Proper DC link voltage provides the effective power dispatch. So, a constant DC link voltage should be maintained to achieve the effective power dispatch between OSWFs and AC grid. A new control approach is a compound of proportional-integral and sliding mode control to regulate the DC link voltage on the grid side VSC. Also, the proposed control approach can control AC voltage and reactive power on wind farm and grid side VSCs respectively. Time- domain simulations executed in MATLAB/Simulink software are used to verify the proposed and conventional control approaches. Transient stability analysis is carried out for a case study. The three-terminal VSC-HVDC system has taken for study, where two OSWFs are fed to AC grid.
DOI:10.1109/ICPEICES.2018.8897474