Since MATPOWER represents dispatchable demand as negative generation with 
negative cost, the objective function ends up being the negative of net 
benefits. Normally you want to maximize net benefits (total benefit to demand 
minus total cost of supply). MATPOWER does this by minimizing the negative of 
net benefits. So a negative objective function silly means that the benefits to 
the loads is greater than the cost to generators … which is what you normally 
expect.

    Ray


> On Mar 16, 2016, at 5:13 AM, Mounika Vanjarapu <[email protected]> 
> wrote:
> 
> sir
> 
> what does  it means a negative objective function.



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