Lab manual psd v sem experiment no 2
- 1. STANI MEMORIAL COLLEGE OF ENGINEERING & TECHNOLOGY POWER SYSTEM DESIGN LAB EXPERIMENT NO. 2 Aim: - Auxiliary power supply scheme for thermal power plant. Apparatus Requirements: - Thermal Power Plant, Main Power Supply, Auxiliary Power Supply. Theory: - The auxiliary power supply can be divided into two categories: Urgent Auxiliary Supply and Service Auxiliary Supply. The Urgent Auxiliaries are those which are associated with the running of a unit and whose loss would cause an immediate reduction of the unit output. The Service Auxiliaries are those whose loss would not affected the output until after a considerable time. Circuit Diagram:- Precautions:1) Do not touch any live conductor. 2) Please keep distance from electrical equipments because voltage level very high i.e. 132 kV, 220 kV, and 400 kV. Procedure:1) There should be two main sources of supply (I) from the grid via the station transformers, (II) from the main generators via the unit transformers.
- 2. 2) The urgent auxiliaries should be supplied from the unit transforms and the service auxiliaries from the station transformers. Each generating unit should have a separate supply and the failure of one unit should not affect the other. 3) The unit board and the station board should be interconnected for starting purposes and to provide a supply in case the unit supply fails. 4) A standby supply should also be provided so that a unit can be brought back to service rapidly in the event of a failure of one of the components in any of the normal supply circuits. Observation Table:- Calculation:- Result:- We have successfully studied about Auxiliary power supply scheme of thermal power plant.
- 3. Viva- Voice Ques. 1 How many categories are divided of auxiliary power supply? Ques. 2 For which supply loss would cause an immediate reduction of the unit output? Ques. 3 What is Thermal Power Plant?
- 4. Ans 1. Urgent Auxiliary Supply Ans 2. The auxiliary power supply can be divided into two categories: Urgent Auxiliary Supply and Service Auxiliary Supply. Ans 3. A thermal power station is a power plant in which the prime mover is steam driven. Water is heated, turns into steam and spins a steam turbine which drives an electrical generator. After it passes through the turbine, the steam is condensed in a condenser and recycled to where it was heated.