Technical Strategies for Voltage Power Regulation in LV Distribution Networks

  • Maurizio Delfanti Energy Department, Politecnico di Milano.
  • Luisa Frosio Energy Department, Politecnico di Milano
  • Gabriele Monfredini Energy Department, Politecnico di Milano.
  • Marco Merlo Energy Department, Politecnico di Milano.
  • Claudio Rosati Energy Department, Politecnico di Milano.
  • Daniele Rosati MCM Energy Lab srl
  • Gabriele Marchegiani ELVI Elettrotecnica Vitali spa
Keywords: Dispersed Generation, over-voltage, voltage regulation, inverter control, point of common coupling


We report the integration of a novel voltage regulation strategy in the inverter control algorithm for Dispersed Generation (DG) applications. The adoption of a decentralized voltage control based on local curves allows the voltage profile to be controlled at the Point of Common Coupling (PCC) of the generators and, therefore, the capacity of existing distribution networks to host more generation from renewables. The work is focused on a low voltage distribution network and both the reactive power modulation and the real power curtailment are considered in the proposed local strategy. Both numerical and experimental analysis are necessary in order to test and validate the proposed voltage control strategy. Firstly, the performances of the proposed control are tested by a numeral analysis and the impact on both the electrical system and the inverter apparatus is evaluated. Secondly, the benefit of the control strategy is analysed by experimental analysis in a test facility to verify the feasibility of voltage regulation in a real feeder.


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