Title :
Dynamic active power control with improved undead-band droop for HVDC grids
Author :
Vrana, T.K. ; Zeni, Luigi ; Fosso, O.B.
Author_Institution :
NTNU, Trondheim, Norway
Abstract :
The earlier developed control method using a piecewise linear droop curve, with different droop values for the different segments, has now been optimised for dynamic performance. Non-linearities at the junctions of two linear droop sections have been adressed. Also non-linearity of power based DC voltage control has been adressed. Dynamic instability due to high control gains has been treated and a new improved control structure has been proposed. The concepts have been validated with RMS simulation with the DIgSILENT PowerFactory software on the CIGRE B4 DC grid test system.
Keywords :
HVDC power transmission; control nonlinearities; piecewise linear techniques; power control; power grids; power system stability; power transmission control; CIGRE B4 DC grid test system; DIgSILENT PowerFactory software; HVDC grids; RMS simulation; control structure; droop values; dynamic active power control; dynamic instability; dynamic performance; high control gains; linear droop sections; piecewise linear droop curve; power-based DC voltage control nonlinearity; undead-band droop; Active Power Control; Droop Control; HVDC; Meshed DC Grid; Power Converter;
Conference_Titel :
AC and DC Power Transmission (ACDC 2012), 10th IET International Conference on
Conference_Location :
Birmingham
Electronic_ISBN :
978-1-84919-700-7
DOI :
10.1049/cp.2012.1975
