Abstract:
Decarbonizing power networks in response to climate change has increased the number of sources connected to electrical grids through inverters, such as solar systems. These systems operate differently from synchronous machines in steady-state or transient operation, causing power system stability difficulties.
Most grid codes mandate fault ride-through operational requirements during severe transmission network contingencies to prioritize reactive power delivery to the power system for voltage stability. This control operation may cause the system voltage to rapidly drop under poor operating situations, such as when the power vs.
voltage curve’s critical value is approaching the dependable voltage operating bound. Inverter control techniques must now provide power system stability. This research applies a newly published fault ride-through control strategy for PV inverters to a multimachine power system and shows that it can preserve transient and voltage stability under adverse voltage operating situations.
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