Reliability of Supply
As a result of reforms in the power sector many new Distribution Companies have started their operations. Apart from improving financial viability, reduction of T&D losses the distribution reforms have been identified as a key area in terms for fulfilling consumers‘ expectations in terms of service delivery in the area of Reliability and Quality of power supply. Reliability and Quality of power supply were rarely an issue till recent past and little or no attention was paid to these aspects of power supply. If consumers‘ expectations are not fulfilled in respect of Reliability and Quality of power supply there is resentment and they are reluctant to pay for the service. On the other hand if the expectations are met or surpassed the consumers are satisfied and willingness to pay increases by sharing the tariff hike. This in turn helps to tone up the financial viability of the DISCOMs (Distribution Companies). Reliability has to do with continuous and uninterrupted power supply i.e. total loss of voltage. Reliability does not cover voltage sags, swells, impulses or harmonics. Reliability indices typically consider such aspects as – Number of consumers Connected load Duration of the interruptions measured Quantum of power interrupted and
Frequency of interruption
There are many indices of measurement. The 3 most commonly referred are SAIFI, SAIDI and CAIDI as defined in IEEE standard 1366 (IEEE – Institute of Electrical and Electronics Engineers with its headquarter in USA which is dedicated to advancing technological innovation and excellence for the benefit of humanity). Reliability of Power Supply and Consumer Satisfaction Reliability of Service needs to be always given primary importance by electric utility system. Consumer is least interested about the availability of power sources, grid conditions but he must be ensured a power supply, which is most