Photovoltaic (PV) systems have variable power generation because of variable parameters (day/night, angle of the panel, clouds, etc.); therefore, it is more challenging to manage distributed voltage, increasing wear and tear in electromechanical utility equipment, and configure protection system with larger distributed generation PV (DGPV) systems. Some of the major issues and their impacts of integrating DGPV are discussed next.
Voltage Regulation
The voltage level of different nodes of distribution system rises locally beyond the acceptable range due to integration of more and more distributed generation PV (DGPV) systems, wind, micro-turbine, and so on. The value of voltage rise depends on feeder characteristics, voltage rating, overhead or underground lines, size of the wire, etc.; the location of solar PV; and load pattern. Advanced inverters can be used to mitigate and eliminate undesirable voltage by shifting the phase angle of sinusoidal current output to absorb or inject reactive power. Advanced inverters can provide capabilities that can benefit the power system, external controllability, real power curtailment in response to excess generation, voltage and frequency ride-through, and so on.
Reverse Power Flow
This story is from the January - June 2019 (Combined Issue) edition of Energy Future.
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This story is from the January - June 2019 (Combined Issue) edition of Energy Future.
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