Photovoltaics in power systems: Legends, challenges and solutions

Photovoltaics are shifting from being a negligible, often ridiculed, power generation technology to a mainstream source of power. The paper recalls why photovoltaics (PV) are challenging the current method of power system planning and operations. It also reviews past research trends in PV grid integration. Three concrete concerns are discussed in detail. As a trend, the challenge for PV in power systems moves from the technical to its economic feasibility. The paper ends with a list of questions to be answered for establishing PV as an important pillar of a secure and sustainable energy supply with minimal social cost.