Power Quality Analysis
Power Quality is generally defined as the voltage that will enable continues, safe operation of equipment connected to a power source. It is usually expressed as a tolerance around a normal operating voltage level. The causes of poor Power Quality can be Voltage Dip, sag, Swell, Transients, Unbalance, Flicker, Frequency Deviation etc.,
The Consequences of poor power quality are as follows:
- Network Hub Server Failure, Disturbance in Drives, Machines Breakdowns, Shutdowns etc.,
- Exhaustion of Insulation & Later Insulation Failure.
- Nuisance Tripping due to mis-operation of relays& contactors.
To eliminate these problems, power quality analysis should be conducted at regular intervals and the faults in the system should be rectified.
Harmonics are created by electronic equipment with non-linear loads drawing in current in abrupt short pulses. The short pulses cause distorted current waveforms, which in turn causes harmonic currents to flow back into other parts of the power system.
Symptoms of Harmonics
- Notching (Electronic control manufacturing, regulator mis-operation)
- Overheating/Failure (transformer, motors, cables/neutral)
- Nuisance Operation (fuses, breaker, PC lockup)
- Insulation Deterioration
- Capacitor resonance / failure
Due to presence of Harmonics in electrical system, one has to oversize neutral, transformer, generators. Losses & inefficiencies/ PF Penalties are increased. Inconsistent meter readings are observed.
By conducting Harmonic Analysis, parameters such as voltage harmonics & current harmonics.
(1st to 50th Order) can be analysed and can be mitigated by implementing a proper solution.