Optimal strategy Subsidies

a su a law reforming energy subsidy in 2011, but this process is to take five years. Iran ceased to fully-rs to st removing subsidies, end users have been supplied by conventional operational strategy of a small scale generator. There are other factors that encourage this study, one of which is privatization; according to article 44 of Iranian constitution, the government is urged to transfer ownership of power plants and some other Tavanir organization reports that Iran annually needs approxi-ws real need for uch as small scale ied in this study in generators when impacts on other by this study, the nerates electricity rogen, which also can be sold at the end of each day. The economic model of grid-parallel PEM fuel cells was previously studied [5e7]. This eco-nomic model has been improved. First, this model has been extended in Ref. [8,9] to study the effects of variable purchased/sold electricity tariffs. The model also was improved to recover thermal power from both reformer and PEM. The Artificial neural networks (ANNS) [10], evolutionary pro-gramming (EP) and Hill climbing techniques (HC) [5,6] were examined todetermineeconomicoperation strategies of distribute