Increasing distributed generation penetration in multiphase distribution networks considering grid losses, maximum loading factor and bus voltage limits

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Increasing distributed generation penetration in multiphase distribution networks considering grid losses, maximum loading factor and bus voltage limits

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This study proposes a new iterative algorithm to improve the performance of multiphase distribution networks by proper placement and sizing of distributed generation (DG) units and single-phase capacitors. The approach consists of utilising the positive-sequence voltage ratio Vcollapse/Vno-load to identify the weakest three-phase and single-phase buses for the installation of DG units and shunt capacitors, respectively. DG penetration levels are increased by evaluating their impacts on voltage profile, grid losses and voltage stability margin while considering the voltage limits at all buses. Detailed simulations are performed for the placement and sizing of a doubly fed induction generator (DFIG) and single-phase capacitors in the IEEE multiphase 34 node test feeder using the DIgSILENT PowerFactory software. The impacts of DFIG on voltage profile, active power loss, maximum loading factor and voltage unbalance factor are highlighted.

Inspec keywords: power grids; iterative methods; asynchronous generators; voltage control; capacitors; voltage regulators; distributed power generation

Other keywords: voltage stability margin; iterative algorithm; DIgSILENT PowerFactory software; voltage unbalance factor; phase capacitor; doubly fed induction generator; bus voltage limit; DG unit; grid loss; IEEE multiphase 34 node test feeder; shunt capacitor; multiphase distribution network; voltage profile; DFIG; distributed generation penetration; loading factor

Subjects: Control of electric power systems; Asynchronous machines; Distributed power generation; Capacitors; Voltage control; Interpolation and function approximation (numerical analysis); Interpolation and function approximation (numerical analysis)

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