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See detailCompound Model of Inverter Driven Grids Stability Analysis of Island Power Grids Containing Only Voltage Source Inverters
Jostock, Markus UL; Sachau, Jürgen UL

in Abstract book of 5th International Conference on Integration of Renewable and Distributed Energy Resources (2012)

This paper presents a structured development of a compound state space model of an inverter driven power grid. It allows to perform stability investigations on power grids, depending on the inverter ... [more ▼]

This paper presents a structured development of a compound state space model of an inverter driven power grid. It allows to perform stability investigations on power grids, depending on the inverter parameters influencing their dynamich behavior and on the grid structure. The general approach is to separate the active components, i.e. the inverters, from the passive components, i.e. the grid, and model them separately. A state space model of a single voltage source inverter is developed and then extended into a multi-inverter model. Based on the linearized power equations of one grid branch, a matrix representation of the grid is developed, based on the sorted node incidence matrix. The grid matrix model and the multi-inverter state space model are joined into one compound control model for inverter driven power grids. [less ▲]

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See detailFrequency Coupling in Inverter Grids Modeling the Mutual Interference of Voltage Source Inverters in Island Grids
Jostock, Markus UL; Sachau, Jürgen UL

in Abstract book of 5th International Conference on Integration of Renewable and Distributed Energy Resources (2012)

This paper presents a model to describe the mutual frequency disturbance of meshed and interconnected voltage source inverters during transient phases. The model provides a weighted mutual frequency ... [more ▼]

This paper presents a model to describe the mutual frequency disturbance of meshed and interconnected voltage source inverters during transient phases. The model provides a weighted mutual frequency coupling matrix taking into account that the mutual frequency measurement disturbance decreases for increasing electric distance between the inverters (i.e. depend on the line admittance) and depends on the respective inverter’s rated power, meaning that stronger inverters have more influence than small ones on the other inverters frequency perception. [less ▲]

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