Advanced Control Strategies of PMSG-Based Wind Turbines for System Inertia Support

• Published in: IEEE transactions on power systems Vol. 32; no. 4; pp. 3027 - 3037
• Main Authors: Li, Yujun, Xu, Zhao, Wong, Kit Po
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.07.2017; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Capacitors; Cascading control; Control systems; Energy consumption; Energy harvesting; Frequency control; frequency regulation; Inertia; Kinetic energy; Maximum power point trackers; permanent magnet synchronous generator (PMSG); Rotors; system inertia support; Turbines; Voltage control; Wind energy; Wind power; Wind turbines
• ISSN: 0885-8950; 1558-0679
• DOI: 10.1109/TPWRS.2016.2616171

This paper investigates two novel control strategies that enable system inertia supports by permanent magnet synchronous generator (PMSG) wind turbines during transient events. The first strategy seeks to provide inertia support to the system through simultaneous utilization of dc-link capacitor energy, and wind turbine (WT) rotor kinetic energy (KE). The second strategy supports system inertia through orderly exerting dc-link capacitor energy of WT and then WT rotor KE via a cascading control scheme. Both strategies can effectively provide system inertia support by fully utilizing WT's own potentials, while the second strategy distinguishes itself by minimizing its impacts on wind energy harvesting. Case studies of one synchronous generator connected with a PMSG-based WT considering sudden load variations have been studied to validate and compare the two proposed strategies on providing rapid inertia response for the system.