Voltage may fluctuate due to improper wiring/groundings or sometimes due to sudden load changes. So as to give constant output voltage we need voltage regulation. If we let the voltage to fluctuate then it might cause damage to the equipments
yes.. voltage regulation can be negative
Percent Regulation is the regulation expressed as a percentage is a figure of merit used to specify the performance of a voltage regulator.
The change in output voltage from no load to full load defines the voltage regulation of that transformer.
A transformer will operate with a voltage regulation of zero when it is not supplying a load.
A transformer will operate with a voltage regulation of zero when it is not supplying a load.
'Zero voltage regulation' indicates that there is no difference between its 'no-load voltage' and its 'full-load voltage' -this is only the case for an 'ideal' transformer.
Regulation =(Obtained voltage per phase - rated voltage per phase)/rated voltage per phase *100
Line regulation is a measure of the ability of the power supply to maintain its output voltage given changes in the input line voltage. Line regulation is expressed as percent of change in the output voltage relative to the change in the input line voltage.
To regulate the voltage
People have used a ballast for current regulation and you can use a breakdown diode for voltage regulation.
change in voltage from no load to full load
raised voltage output