testGFM - Test methods for assessing grid forming characteristics

Due to the increase in the share of renewable energy in electricity generation, the structure of power grids experienced a change in recent years. Using renewable energy sources and storage technologies practically always relies on converter technology. In the past, this percentage share was minimal or even negligible, but today operating situations already occur in which the dynamic characteristics of the power grid are strongly influenced by the displacement of the classically used synchronous generators. In contrast to conventional rotating machines, the behaviour of power electronic systems primarily depends on implemented control strategies. In practice, there is a wide variety of different control strategies, although there are still unanswered questions about their stability in the power grid. One possibility is to emulate the positive (stability) characteristics of synchronous generators. These control strategies are called grid forming controls. However, to ensure a secure supply, grid operators must ensure compliance with this behaviour. Due to the lack of transparency of the control system and to protect the intellectual property of the manufacturers, test methods must be developed that enable the properties to be verified externally. In this project, methods for classifying the grid-friendly behaviour of power generation systems are researched and their implementation in converter technology is investigated. Platform-independent testing and evaluation procedures are subsequently developed and tested in various simulation environments and Hardware-in-the-Loop platforms. This enables the fundamental knowledge about reliable assessment of the required grid codes and provides the foundation for the stable integration of energy-efficient renewable generation.