A Universal Controller for Grid-Connected Voltage-Source Converters
Lennart Harnefors, Jarno Kukkola, Mikko Routimo, Marko Hinkkanen, Xiongfei Wang
2020IEEE Journal of Emerging and Selected Topics in Power Electronics159 citationsDOIOpen Access PDF
Abstract
The power-synchronization control (PSC) and vector current control (VCC), the latter including cascaded outer loops, are, respectively, considered to be grid-forming and grid-following schemes. They have significant structural differences. Despite that, it is here shown that the two schemes can be unified by making a series of minor modifications to PSC. This results in a universal controller, allowing various combinations of the two schemes to be explored. Fundamentally, it allows PSC to be used as a guideline for a robust VCC design, permitting stable and well-performing operation irrespective of the grid strength.
Topics & Concepts
ConvertersController (irrigation)GridVoltageElectrical engineeringComputer scienceControl theory (sociology)Voltage sourceElectronic engineeringEngineeringMathematicsControl (management)BiologyAgronomyGeometryArtificial intelligenceMicrogrid Control and OptimizationAdvanced DC-DC ConvertersMultilevel Inverters and Converters