Do distributed photovoltaic systems contribute to the power balance?

Tom Key, Electric Power Research Institute. Distributed photovoltaic (PV) systems currently make an insignificant contribution to the power balance on all but a few utility distribution systems.

What is a grid-connected photovoltaic system?

Grid-connected photovoltaic (PV) systems cover a wide range of applications. Most PV systems are residential (up to several kW) and commercial scale (up to several MW) connected to distribution networks. However, many PV systems are large generation facilities (some exceeding 100 MW) and are connected to the transmission system.

Why is the model of a grid-tied PV system limited?

The modeling performed specifically for this work was limited because of the available time. One author has developed a detailed system-level model of a grid-tied PV system, and extensively experimentally verified the model with assistance from the Distributed Energy Test Laboratory at Sandia National Laboratories.

How to scale dynamic model to the size of aggregated PV generation?

To scale the dynamic model to the size of the aggregated PV generation, the generator MVA base MVA (mvab parameter in the example above) must be adjusted. In this case, fixed power factor was emulated by setting the reactive limits (qmin and qmax in the example above) to zero. The model allows two basic reactive power control modes, listed below.

What is PV plant dynamic modeling?

PV plant dynamic modeling is an area of active research. As with any other model, the WECC generic PV plant models will evolve based on industry experience and technology evolution.

What is DC power distribution architecture?

Investigate DC power distribution architectures as an into-the-future method to improve overall reliability (especially with microgrids), power quality, local system cost, and very high-penetration PV distributed generation. Develop advanced communications and control concepts that are integrated with solar energy grid integration systems.