Grid Voltage Synchronization For Distributed Power System Under Grid Fault Condition

Electrical Engineering

Electrical energy can be obtained from conventional and non-conventional energy sources such as solar, wind, biomass, water, and coal, nuclear, oil, and thermal power plants, respectively. Synchronization has been a serious concern in the past due to the time spent estimating grid variables. For the purposes of this study, a battery-based distributed generator is examined. By 2030, the power share of renewable energy-based generation systems is expected to reach 20%, with wind and photovoltaic (PV) systems expected to be the most prominent instances of such system integration into the electrical network. As a result of the increased visibility of these technologies in the electrical network, transmission system operators (TSOs) are becoming increasingly concerned about their impact on grid stability; as a result, grid connection standards for distribution generation systems are becoming increasingly restrictive in all countries. Special limitations for the operation of such palnts under grid voltage failure conditions have earned a significant deal of relevance in previous grid code requirements (GCRs). For example, in fixed-speed wind turbines based on squirrel cage induction generators, the voltage drop in the stator windings can cause the generator to overspeed and trip. Similarly, due to the disconnection of the rotor side converter under such conditions, variable speed wind power systems may lose controllability in the injection of active/reactive power. PV systems, on the other hand, would be affected by the same lack of current.

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