Grid Forming Control for Power Systems with up to 100% Inverter Based Generation

The development of renewable energy sources supplying electrical power systems in a large scale could cause important stability issues at the system level. A possible solution would be the introduction of grid forming controllers or the power electronic converters interfacing these sources. One of the suggested grid-forming technologies is the Virtual Synchronous Machine (VSM), which emulates the transient electromechanical characteristics of traditional synchronous machines. In this paper, the controller of a proposed grid forming converter will be presented. In a small power system load and fault disturbances, balanced and unbalanced, will be applied, presenting the behaviour of the proposed grid forming converter. Electromagnetic transient (EMT) software is used to study the converter output waveforms, as RMS models partially hide the response of the power converters during abnormal operation.