How the Voltage Control in power system is achieved?
Answer: Voltage control is achieved by suitably installing voltage control equipment at specified places such as at Generating stations, Transformer stations supplying power to feeders, and at load end
Name the different methods of controlling voltage in an ac supply system?
Answer: The different methods of controlling the voltages in an ac supply system are:
- Excitation control at generating stations
- By using tap changing transformers
- Induction regulators
- Booster transformers
- Series compensation
- Shunt Compensation
- Synchronous phase modifiers
What is a booster transformer?
Answer: Booster transformer is one which is often used towards the end of a power line in order to raise the voltage to a desired value
Why it is necessary to keep the receiving end voltage constant within specified limits?
Answer: For satisfactory operation of the equipment/machinery supplied by the electrical power network it is necessary to keep the receiving end voltage constant within the specified limits. Too wide variation of the voltage may cause the erratic operation or even malfunction of the consumer appliances
Why excitation control is not possible beyond certain limits?
Answer: Excitation below certain level may cause instability of the system and excitation above specified limits can lead to overheating of the machine's stator and rotor. So excitation control is not possible beyond certain limits
What are the some precautions must be taken when using a booster transformer?
Answer: There must be no fuse on the high voltage (hv) side or primary side since the booster transformer is similar to current transformer. If the fuse blows an extremely high voltage could built up on the secondary side
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