Section 9(1) in Rajasthan Electricity Regulatory Commission (Transmission Licensee's Standards of Performance) Regulations, 2004
(1)General. - Many loads in power system produce current and voltages at frequencies in multiple of the fundamental frequency. These multiple frequency voltage and currents are called harmonics and their ratio to the fundamental frequency is called harmonic order. Harmonics effect system operation and life of the equipments. Harmonics of add orders are more undesirable. Especially Industrial sub-stations the effect of harmonics are more severe. Some types of loads like Induction and Arc Furnace, electromagnetic equipment such as X-ray machines etc. may produce harmonics in supply voltages. Distribution Licencee shall ensure that the loads connected at the inter-connection points with Licencee not induce any harmonic voltage and distort the supply waveform. Subject to Distribution Licencee observing the Grid Code Connection Conditions in this regard, Licencee shall monitor the voltage harmonic levels at the supply points to the Users (Distribution Licencee, RVUN and major EHV consumer) and other strategic locations on the transmission system.
