  Global energy crises are increasing every moment. Every one has the attention
towards more and more energy production and also trying to save it. Electricity
can be produced through many ways which is then synchronized on a main grid for
usage. The main issue for which we have written this survey paper is losses in
electrical system. Weather these losses are technical or non-technical.
Technical losses can be calculated easily, as we discussed in section of
mathematical modeling that how to calculate technical losses. Where as
nontechnical losses can be evaluated if technical losses are known. Theft in
electricity produce non-technical losses. To reduce or control theft one can
save his economic resources. Smart meter can be the best option to minimize
electricity theft, because of its high security, best efficiency, and excellent
resistance towards many of theft ideas in electromechanical meters. So in this
paper we have mostly concentrated on theft issues.
