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Which of the following voltage regulations is considered best?
10%
20%
100%
4%
4%
Voltage regulation is a measure of the change in voltage at the receiving end of a transmission line when the load is removed, keeping the sending end voltage constant. A lower percentage indicates better performance because it signifies that the receiving end voltage remains more stable regardless of load variations.
Voltage regulation is a measure of the change in voltage at the receiving end of a transmission line when the load is removed, keeping the sending end voltage constant. A lower percentage indicates better performance because it signifies that the receiving end voltage remains more stable regardless of load variations.
Voltage┬аRegulation=VFLтАЛVNLтАЛтИТVFLтАЛтАЛ├Ч100% тАФ where VNLтАЛ is no-load voltage and VFLтАЛ is full-load voltage.
It is defined as the change in receiving end voltage from full load to no load, expressed as a percentage of the full load voltage. A smaller value implies that the internal impedance of the transmission line is lower relative to the load, leading to reduced voltage drops and better power quality for end-users.
Voltage regulation reflects the capability of a system to maintain a constant output voltage under varying load conditions.
A regulation of 0% would imply an ideal line with no voltage drop, which is physically impossible due to line resistance and reactance.
Transmission lines are typically designed for low regulation to avoid voltage flicker and equipment malfunction.
Consistent performance for industrial and domestic appliances
Reduced need for external voltage compensation devices
High cost of materials for low-impedance lines
Complex design requirements for large power systems
Electrical power transmission systems
Transformer performance assessment
Regulation values exceeding 10-15% are generally considered poor for grid stability.
Option C (100%) represents a massive drop, indicating high impedance or an inefficient power path, whereas 4% indicates a highly efficient and stable system.
D is correct тАФ A lower percentage value indicates a smaller change in voltage under load, reflecting a more stable and efficient transmission line.
Always remember that in electrical machines and power systems, lower percentage values for impedance or regulation are generally indicative of higher quality or efficiency.