Controller tuning of generic positive sequence solar PV models used in interconnection studies

With increased penetration of renewable energy sources in the bulk electricity system, it is important for power system planners and operators to maintain grid stability and carry out system impact studies for identifying reliability-related problems. Adequate models have been developed by the industry to represent positive sequence response of solar PV plants for grid interconnection studies. In this work, both steady state and dynamic modeling of interconnected solar plants are discussed. Test systems are developed in positive sequence power system simulators such as Siemens PSS/E and GE PSLF to capture inverter models' response to various control modes. The results of this work provide a better visualization of how tuning the gains of the electrical control and the power plant control can stabilize solar plant operations in an interconnected network.