Automatic Design Optimization Tool for MW-Class Photovoltaic Power Generation Systems

Toshiba has developed a conceptual design tool for MW-class photovoltaic (PV) power generation systems for the public-sector and industrial markets that can automatically lay out solar cell modules and related facilities. We began offering PV engineering services in July 2012.

This conceptual design tool can generate various design alternatives at high speed, taking into account the impacts on sunshine caused by the geographical features and buildings around the installation site. It shortens conceptual design time from about 10 days to about 1 day.

Conventionally, much time was required to generate three-dimensional (3D) layout data for sunshine impact analysis. Due to the automated data generation process, the new tool produces layout data for tens of thousands of PV modules in only about 10 seconds on a PC. It also speeds up solar insolation and reflection analysis by using an original geometric algorithm. Furthermore, we have developed a unique data model that allows simultaneous processing of both layout and electrical design data. Using this data model, the conceptual design tool can perform the entire design process from facilities layout to simulation for annual cost estimation of power generation, as well as DC cabling.

Flow of engineering for design optimization

Consequently, once a facility model has been created with this tool, various design alternatives can be rapidly and easily generated by changing the design parameters of the model in order to clarify the customer's requirements. Furthermore, we can interactively seek the optimal design with a customer during a meeting; for example, to minimize the cost of solar power generation. We are creating design frameworks using this tool in order to reach out to worldwide markets such as emerging-country markets, where PV demand is expected to increase.