What is voltage control in a power system?
Voltage control is an integral part of power system operation. This requires generating equipment to measure a voltage, compare the measurement to a reference and increase/decrease the reactive power flow out of the generating equipment.
Which method is considered as the most effective voltage control method?
As the inductor voltage is sensitive to the phase shift ϕ, but not sensitive to the change in magnitude of reference, the IVC method is more effective in keeping the line current in phase with the line voltage.
What is the need for voltage control in a power system?
Voltage control in an electrical power is importance for proper operation for electrical power equipment to prevent damage such as overheating of generators and motors, to reduce transmission losses and to maintain the ability of the system to withstand and prevent voltage collapse [2].
Which is not a method of voltage control?
Which of the following equipment is not used for voltage control? Explanation: Induction generators are not used for voltage control. Tap changing transformer is used to control distribution end voltage for upto limited voltage variations.
What are the methods of voltage control?
Methods of voltage control in power system
- Using excitation control or voltage regulators at generating stations.
- By using tap changing transformers.
- Using induction regulators.
- By using shunt reactors.
- By using shunt capacitors.
- Using synchronous condensers.
Which of the following is voltage control methods?
Controlling the system voltage by the help of shunt inductive element is known as shunt compensation. The methods used for controlling the voltage are explained below in details. 1. Off – Load Tap Changing Transformer – In this method, the voltage is controlled by changing the turn ratio of the transformer.
Which of the power system following is used for voltage control in?
AVRs are used to control the voltage at the terminals of the generators.
What is the purpose of voltage control?
The purpose of a voltage regulator is to keep the voltage in a circuit relatively close to a desired value. Voltage regulators are one of the most common electronic components, since a power supply frequently produces raw current that would otherwise damage one of the components in the circuit.
How is voltage control used in a power system?
The task of voltage control is closely associated with fluctuating load conditions and corresponding requirements of reactive power compensation. Therefore several voltage control methods are employed in power system to keep the voltage levels within 4.
How is the voltage of a transformer controlled?
The methods used for controlling the voltage are explained below in details. 1. Off – Load Tap Changing Transformer – In this method, the voltage is controlled by changing the turn ratio of the transformer. The transformer is disconnected from the supply before changing the tap.
When to increase voltage in a power system?
The voltage is normally high at light load and low at the heavy-load condition. For keeping the voltage of the system in limits, some additional equipment requires which increase the system voltage when it is low and reduces the voltage when it is too high. The following are the methods used in the power system for controlling the voltage.
How are series capacitors used to control voltage?
Voltage Control by Series Capacitors In Extra High Voltage (EHV) or Ultra High Voltage System (UHV) systems series capacitors are connected in series with the transmission line to reduce the effect of inductive reactance XL between the sending end and receiving end of the line.