Knowledge‐Based Primary and Optimization‐Based Secondary Control of Multi‐terminal HVDC Grids

This chapter presents a knowledge‐based primary and an optimization‐based secondary control scheme for offshore multi‐terminal high voltage direct current (HVDC) grids. It demonstrates that the proposed method ensures optimal power dispatch in the HVDC grid ensuring robustness and flexibility in operation. The chapter discusses the application of intelligent control techniques to offshore wind plants with HVDC transmission. In high voltage multi‐terminal DC (HV‐MTDC) literature, two broad categories of control strategies have been proposed, viz. proportional integral (PI) based strategies‐constant power, constant voltage—and droop strategies. The proposed strategy combines constant active power and droop voltage control strategies. The chapter presents the time domain simulation results carried out with the proposed intelligent control strategy both at the primary and secondary levels. The proposed control scheme employs a computational intelligence technique in the form of a fuzzy controller for primary voltage control and genetic algorithms at the secondary control level.