how can i fuzzify the load_power vector?

I'm using the power flow algorithm from "http://www.mathworks.com/matlabcentral/fileexchange/34200-radial-power-flow" I have a load_power vector which contains actual load powers. There is a projected increase in load power of 6% and maximum increase of 10% (so any load can be at 100%, 106% or 110% of the actual vector). How can I fuzzify the load_power vector so that the program gives a fuzzy load flow? I've considered looping with different values of the load power with subsequent changes in load power but this is impractical for large vector. (for a 33-bus system, there will be 3^33 runs) NB:(tic toc gave me a run time of approx 2.3 seconds for one run, so 3^33 should be taking me millions of years... T_T)