Non-Technical Losses in power system: A review

Utilities experience significant revenue fatalities due to Non-Technical Losses (NTLs). These losses are principally caused by fraud activities deliberately performed by the consumers. NTLs lead to a series of additional losses, including damage to grid infrastructure and reduction of grid reliability. This paper presents arigorous review of technologies, methodologies and active approaches aimed at improving with emphasis in the accurate estimation and reduction of NTLs. Additionally, the sources of NTLs along with the possible impacts of NTLs on the economy is also focused.