Abstract:During photovoltaic power plant design, the position of combiner box is critical. Less cable usage will not only save cost, and will also reduce cable voltage drop loss. Combines with the facts and features of photovoltaic power plant, the mathematic model of combiner box site selection was built bases on Manhattan distance. The objective function was indicated. The most cost efficient point was provided and proved.

Keywords:photovoltaic power plant, photovoltaic array, combiner box;site selection model;site selection improvement;Manhattan distance