Generic PLL-Based Grid-Forming Control
Lennart Harnefors, Mario Schweizer, Jarno Kukkola, Mikko Routimo, Marko Hinkkanen, Xiongfei Wang
Abstract
In grid-forming control, the swing equation of a synchronous machine is emulated by a power controller. Thereby, frequency droop, power-oscillation damping, and/or virtual inertia can be obtained. In this letter it is shown that a phase-locked loop (PLL) - which is normally grid following - can be designed so as to, in turn, emulate a generic power controller, thus, becoming grid forming.
Topics & Concepts
Phase-locked loopGridComputer scienceControl (management)PLL multibitControl theory (sociology)Control engineeringElectronic engineeringEngineeringMathematicsJitterArtificial intelligenceGeometryMicrogrid Control and OptimizationIslanding Detection in Power SystemsHVDC Systems and Fault Protection