The quality of Electricity involves voltage, frequency, and waveform.

Public Utilities Commission of Sri Lanka (PUCSL)  has issued a regulation (Electricity (Distribution) Performance Standard (Regulation) ) to maintain  the quality of  electricity supply in Sri Lanka

the license holders should provide the electricity supply services and report the data to the PUCSL as per this regulation

Access reliable and safe electric power to commensurate with the quality standards licensee has agreed to provide is a right of an electricity consumer – ( Consumer Rights and Obligations code)

Good power quality can be defined as a steady supply voltage that stays within the prescribed range, steady a.c. frequency close to the rated value, and smooth voltage curve waveform (resembles a sine wave). The lifetime of electrical appliances directly affects from the quality of electricity it gets also the quality of electricity is a very important factor for various industries, self-employed, and public.

Reliability of Electrical Supply

1. System Average interruption frequency index – Number of Breakdowns of electricity to one consumer per year

2. System Average interruption duration index – Cumulative duration of Electricity loss (minutes) to one consumer due to breakdown of electricity per year

3. Unserved estimated energy – Unserved estimated energy per year due to the breakdown of electricity

4. An instant normal breakdown indicator

These values are being processed by the Commission. A penalty system will be introduced for the licensees who do not comply with these values. The Commission encourages licensees to provide a continuous qualitative supply of electricity complying to the indexes.