This is the wrong group for that question. You need to pose this question in the Matlab users forum for a better response. Keep in mind that Matlab's simulation tools are only as good as your models, therefore spend a lot of time refining your models.
Also a distributed model is like a Gaussian curve model in which the distribution of points (in this case loads) will also need to determined by the statistical distribution for the amount of the loads. Its likely that the wider the distribution, the higher the impact on the system.
So this is a typical problem of load balancing for a electrical loaded system. All factors *must* be taken into account for an accurate simulation compared to experimental results.