First Side working involvement

After getting the safety equipment, finally we are allow to follow the engineers to work at the side. This time is a 21MBR10CP calibration (pressure transducer calibration). According to the engineers, the pressure transducer calibration need to be checked at least once a year to make sure the pressure transducer's switch is able to disconnect at the correct pressure, 50mbar.

The engineers unplug the pressure transducer and inject pressure to it. Later, they check the disconnect pressure and adjust it to the correct scale. There are three transducers that need to be checked, after watching the engineers doing that, they allow us to hands on for the last transducer, and this is a precious opportunity for me to learn and experience. After checking all three transducers, they attach them back to the machine.




After performing all this work, we go back to the control room, the engineers explain to us that the function of the transducer. They are used for the 2 out of 3 protection system, which means, if two of them show high pressure, the system will trip on its own.



This is what we learn during this calibration check out and we are very lucky to have mr. Tawang who are willing to teach us.

Safety and Health Precaution

Working in YTL power plant which is consider to be a dangerous working place, it is important that everyone taken the safety precaution well to protect ourselves and also others. During the safety briefing, we were informed that to :
1. Wear PPE when we are working in the power plant.
2. Follow the safety precaution when performing certain job.
3. Require a permit before performing any job.


Safety shoes



Safety helmet



Ear plug


Everyone of the trainee are provided these safety equipment and attire that we need once we enter the power plant. Thanks to YTL Power.

Basic Plant Operation

During the first week of industrial training, we had went through the basic operation of the plant. From the input resource (natural gas) until the production (electrical power),this proses is done by a power plant system from SIEMENS v94.2.

GAS TURBINE PLANT:



Natural gas are feed into the gas turbine to generate the first stage power where te rated ISO-power is 150 MW. The siemens V94.2 gas turbine generator are single shaft, single casing and heavy duty design.


HEAT RECOVERY STEAM GENERATOR (HRSG):



For combine cycle system design, the heat produce in the gas turbine is not wasted, where it is used to heat up water to superheated steam to supply it to the second generation stage, steam turbine generation.


STEAM, FEEDWATER AND CONDENSATE PLANT



The drum of each HRSG is supplied with feedwater from the feedwater tank by means of HP feedwater pumps. This feedwater will go through four stage of heating process, they are preheater, economizer, evaporator and superheater.
The superheated steam produce will be sent to the steam turbine via the main steam piping system.

STEAM TURBINE GENERATOR



The steam turbine is designed as a single-casing, axial-flow reaction condensing turbine. When it was supplied with superheated steam, power will be generated. Later, the superheated steam will release its energy and back to steam, and this steam will be cooled down by seawater and recycle back to the boiler stack to heat up again.

Above are the discussion of the basic operation of YTL power plant. The power produce in both gas turbine generator and steam turbine generator, will be gathered and send to TNB for further distribution.

INTRODUCTION

This is the first article for my industrial training blog, so i think i need to do some introduction to the place that the training take place.

Location:
Paka YTL Power Station

Department:
5 weeks in control and instrumental department
5 weeks in electrical department
2 weeks in operation department

Training duration:
5 April 2010 till 25 June 2010

YTL power station is a power plant that consist of 2 combine cycle block. It has a capacity of 808 MW where it means that the station maximum production is 808 MW, but the station will not always stress the machine to perform its maximum rate, normally, it produce around 780 MW plus depends on the schedule. The power that generated by Paka YTL Power Station, will be supply to TNB Sultan Ismail power station where locate just beside YTL power plant. The resource of this power station is natural gas that directly supplied from PETRONAS.




The advantage of combine cycle power plant:
- highest efficiency
- best economy
- greatest flexibility
- fastest installation
- least pollution