Open AccessParameter tuning of the PLL to consider the effect on power system small‐signal angular stability
Author(s) -
Du Wenjuan,
Chen Xiao,
Wang Haifeng
Publication year - 2018
Publication title -
iet renewable power generation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.005
H-Index - 76
eISSN - 1752-1424
pISSN - 1752-1416
DOI - 10.1049/iet-rpg.2016.0835
Subject(s) - phase locked loop , control theory (sociology) , signal (programming language) , engineering , resonance (particle physics) , torque , power (physics) , physics , computer science , electronic engineering , jitter , control (management) , particle physics , quantum mechanics , artificial intelligence , thermodynamics , programming language
A phase locked loop (PLL) tracks the phase of the terminal voltage of a grid‐connected permanent magnetic synchronous generator (PMSG) for wind power generation. Phase tracking by the PLL is used by the vector control for the grid connection of the PMSG. This study investigates the impact of phase‐tracking performance of the PLL on power system small‐signal angular stability. Damping torque analysis conducted in this study explains why the impact of the PLL is normally small. The analysis indicates that under the special condition of open‐loop modal resonance, however, the effect of the PLL may become significant. It is very likely that the open‐loop modal resonance may reduce the power system small‐signal angular stability. Hence, in tuning the parameters of the PLL, the open‐loop modal resonance should be avoided. In this study, the procedure about the parameter tuning of the PLL to consider the effect of open‐loop modal resonance is proposed and demonstrated in an example multi‐machine power system integrated with a PMSG. Analysis and conclusions made in this study are evaluated using the example power system.