Modulation controls for the New Zealand DC hybrid project

1400 MW New Zealand HVDC upgrade: Introducing power modulation controls and round power mode

“…This controller enables the generators in both power systems to provide power reserves to support the network frequency after a severe disturbance in either power system. This controller was already implemented for the existing HVDC Pole 2 controls [3]. The SRS transfer function is shown in Fig.…”

“…Therefore, the HVDC system can control the frequency and maintain stable operation of the Haywards / Wellington area island. This controller was already implemented for the existing HVDC Pole 2 controls [3]. The CFC transfer function is shown in Fig.…”

“…The control also provides effective damping of post fault power oscillations. This controller was already implemented in the existing HVDC Pole 2 controls [3]. The FSC transfer function is shown in Fig.…”

“…The beneficial impact of modulation functions on the power system stability is well-known and has to be studied thoroughly, [1] and [2]. Thus, modulation functions were also studied in 1991 for the New Zealand Pole 2 HVDC project [3]. For the upgrade, the Pole 2 modulation functions were re-studied to take account of the increased capacity that will be provided at completion of the project, and of the changes that have occurred in the New Zealand power system since 1991, [4] and [5].…”

Advanced nonlinear control of complex power systems

“…Therefore, AC voltage restores sufficiently and AC system collapse is prevented. References for this kind of control can be found in [76,[121][122][123][124][125][126][127][128][129][130][131]. Among them, coordinated modulation of active power and reactive power control through firing angle control is proposed in [126].…”