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001016719 1001_ $$0P:(DE-Juel1)184784$$aBöttcher, Philipp C.$$b0$$eCorresponding author
001016719 245__ $$aStability bounds of droop-controlled inverters in power grid networks
001016719 260__ $$aNew York, NY$$bIEEE$$c2023
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001016719 520__ $$aThe energy mix of future power systems will include high shares of electricity generation by wind turbines and solar photovoltaics. These generation facilities are generally connected via power-electronic inverters. While conventional generation responds dynamically to the state of the electric power system, inverters are power-electronic hardware and need to be programmed to react to the state of the system. Choosing an appropriate control scheme and the corresponding parameters is necessary to guarantee that the system operates safely. A prominent control scheme for inverters is droop control, which mimics the response of conventional generation. In this work, we investigate the stability of coupled systems of droop-controlled inverters in arbitrary network topologies. Employing linear stability analysis, we derive effective local stability criteria that consider both the overall network topology as well as its interplay with the inverters’ intrinsic parameters. First, we explore the stability of an inverter coupled to an infinite grid and uncover stability and instability regions. Second, we extend the analysis to a generic topology of inverters and provide mathematical criteria for the stability and instability of the system. Last, we showcase the usefulness of the criteria by examining two model systems using numerical simulations. The developed criteria show which parameters might lead to an unstable operating state.
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001016719 7001_ $$0P:(DE-HGF)0$$aGorjão, Leonardo Rydin$$b1
001016719 7001_ $$0P:(DE-Juel1)162277$$aWitthaut, Dirk$$b2
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