Introduction to Generator Hydrogen Gas Cooling System

The gas unit for generator gas cooling comprises the components necessary to fill the generator with hydrogen, maintain it under pressure, check the gas purity and evacuate the generator. To prevent the formation of explosive gas mixtures, the air in the generator is expelled with CO2 prior to filling with H2. Generator Hydrogen Gas Cooling AreaH2 gas is then pumped in, displacing the C02. When evacuating the generator, the order is reversed. The...

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What is A Steam Turbine?

According to Wikepedia, steam turbine is a mechanical device that extracts heat energy from pressurize steam converts into the mechanical motion. 86% of electric generation in the world is using steam turbine. The steam turbine is a form of heat engine that derives much of its improvement in thermodynamic efficiency from the use of multiple stages in the expansion of the steam. A turbine contains dozens of louvers or angled blades mounted to a central shaft. The turbine output shaft is connected to a massive generator. The wheels and shaft begin...

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Lumut or Segari Power Plant

Lumut Power PlantLumut Power Plant and also known Segari Power Plant is a combine cycle power plant. Owned by Segari Energy Ventures Sdn Bhd (SEV), a subsidiary company of Malakoff Berhad. Located at Mukim Pengkalan Baru, District of Manjung in Lumut Perak with 80 acre site on old tin mining land. It is located 30 km from Manjung Coal Fired 3X700 MW Power Plant which owned by Tenaga Nasional Berhad. Segari combine cycle power plant is designed with...

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Unit No.1 LP Heater No.4 Normal Level Control Valve Diaphragm Leak

Operation called to check control valve which only open 70% but feedback position is 100% By manual from DCS open the valve 0%– 100 % : okPhysical check from field has small leak at the diaphragm nut hole, try retighten the bolt but still leak from opposite side.Inform operation to raised defect, need to replace with the new diaphragm and calibrate the valve. Follow up defectOperation allows replacing the leak diaphragm....

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GP Joran Coal Fired Power Plant 2008 Among Staff Updated

This fishing competition caught the staffs’ interest especially the sport fishing lover. Find my previous post before. Beside it is also good event to show appreciation from the management to build good relationship between company and their staffs. This competition took place on January 26, 2008 from 0800 am to 1200 pm, drew 50 participants from our staff along the seaside behind the pump house. See photos below;1) First photo: Coal Fired Power...

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GP Joran Coal Fired Power Plant 2008

Today our management doing another event in station. GP Joran Coal Fired Power Plant 2008! This is only internal events for our staff and not open to the public.I will post the photo on this event later. More information will be update soon. Don't forget to come back again...

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Band Screen Vega Radar Level Transmitter Trending

I have posting before the new type change of this Vega Hydrostatic Level Transmitter. The current trending is using the old type which often make trouble. As you can see as per photo below, the reading quite hunting.This problem only occured when the sea water level at low tide. At the high tight, no problem and the reading is quite stable. I am not so sure why it's behaviour like this. Already change a few times, but nothing change especially when...

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Conductivity Analyser High Alarm Operated at The Generator Panel

High alarm operated. Permit issued to check probe and termination at panel. Service and tighten termination then get reading 0.13 μS/cm. High alarm reset (>0.20 μS/cm). Conductivity range is 0.00 – 1.00 μs/cm. I already list out in the purchasing for next order. You can check the thing here before together with ABB products. Condenser Hotwell Conductivity SensorManufacturer: ABB 2085-4085Specification: K = ...

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Change New Type Bandscreen Level Transmitter

The old type hydrostatic level transmitter cause few pump trips and need to be change as possible. From the photo below you can see that barnacles growth on the probe itself. Then we change to new Vega Radar Level Transmitter.The Old Type Of Vega Hydrostatic Level TransmitterThe New Type of Vega Radar Level TransmitterBandscreen is water intake screen at the pump hou...

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Wet Coal Cause Bunker Level Transmitter Fluctuate

The bunkers level start problem when bunkering with new coal. The situation seems that the problem occurred due to dust extraction filters too dirty which are covered with wet coal. Therefore the dust extraction filters have been cleaned and serviced by coal and ash maintenance team. After that bunkers level reading back to normal.I am suspected that hot coaling had caused condensation in bunkers atmosphere and make dust inside the bunker becomes wet. When dust extraction does not function efficiently, wet coal dust accumulates at the bunker level...

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ECP Flow Switch Already Delivered Today

If you remember my previous post about this flow switch, the stock already zero at our store. At the moment the ECP Flowtech flow switch give a lot of problem to us.10 New Pieces ECP Flowtech Flow Switch Delivery in a BoxThe root cause of the problem it is always broken or the spring easily drop off because of the chlorine which we know that it's create corrosion. We got 10 pieces. Anyway need to modify to 2.5 inch and put some weightage at the...

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WTP ACID DAY TANK LEVEL MAGNETIC SWITCH FAULTY

Acid Day Tank Level Magnetic Switch faulty today as per photo below. Need to replace with the new. Try to get the original specification from the switch itself but nothing was found. Except it's brand Jola.Need to get a new brand from local supplier and easy to purchase. Anyway, we still have three spares at the store before everything finish and have the time to mana...

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Microrec Alarm Came Back

Last week, we already attended the Microrec alarm defect but the alarm came again on last Saturday morning.- Protection Fault 01MAY10EU249XC8 - Calculated Trip Test Fault 01MAY10EU276XC9 - Protection Test Fault 01MAY10EU281XC9 As we are aware the fault alarms were triggered during the microrec self test (every 24 hours) which involved the opening and closing of all the dump valves. Therefore it is very likely that the fault has to do with the speed of valve opening and closing or open and close switches make contact. Look like it requires...

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Washdown Water Sump Level Switch

Washdown Water Sump Level Switch 09ETK90CL010 & CL011 TT4 Defect – Operator called to check Low Level Alarm cannot be reset and High Level Alarm not activate. This will caused pump can’t cut in to pump water from drain pit. The reason to drain water is to allow mechanical team clear sludge from pit. Check at local simulate both signal for Low and High Level for pump cut in. After all water cleared normalize back simulation. Inform operator to monitor again water level after mechanical team clear the sludge....

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New Project Flow Switch at Electrochlorination Plant

Remember when I posted about the flow switch before? Now we have a new project to change all the old flow switch type which give us a lot of problem at the electrochlorination plant. The reason why this old type switch need to be change is because our ECP always tripped when the flow switch is broken. The new project actually to change the contact probe to non-contact which might increase the reliabilty of the plant process. I put here some photo...

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ABB Water Analyser Urgently Required

Below is the list for the spares that need urgently reorder today; Chloride PCB Assembly ABB 8234ABB 8230-130 Chloride Electrode ABB 8234 ABB 8234-150 Silica Magnetic Stirrer Bar- Mixer Block ABB 8241 ABB 0217-321 Silica Drain Pinch Valve ABB 8241 ABB 0234-021 Silica Photocell Housing Assembly Measuring ABB 8241 ABB 8241-158 Silica Temperature Sensor Assy. For Reaction Block ABB 8241 ABB 8240-124 Silica Pump Motor Assembly 50HZ-Terminated ABB 8241 ABB 8240-103 Silica 2-Stream Out-Put...

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Bunker Level Transmitter Faulty

Unit No.1 Bunker 20Unit No.2 Bunker 60 and 70Remove bunker level transmitter and found transmitter detector dirty with wet coal dust. Service and clean then install back to bunker. Reading under monitoring by maintanance team. Picture attached for reference. As per maintanance team suspect dust extraction not working as well....

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Fault Alarm at Microrec Appeared

Turbine Protection Alarm activated last night. After the checking, here we found that; - Protection Fault 01MAY10EU249XC8- Calculated Trip Test Fault 01MAY10EU276XC9 - Protection Test Fault 01MAY10EU281XC9At microrec, a lot of logics need becarefully check since the software history itself given much trouble to unit.Discussed in detail among us this morning examining the risks in re-setting this alarm and the conclusion reached is minimal risk, to be extra careful should be carried out at low loads and after evening peak.More detail: the...

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Feed Water Tank Pressure Transmitter Bar Absolute

This morning I got another email complaint on our instrumentation field device about Feedwater Tank Pressure Transmitter:"I have been highlighting the Unit 1 Feedwater Tank Pressure Transmitters (01LAA11CP501A/B/C) since December 25th. The transmitters should read Bars Absolute but have been set to Bars Gauge. This means that the FWT Pressure Control operates at 2.7 barg (3.7 bar abs) instead of 1.7 barg (2.7 bar abs). Please use this opportunity...

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RTDs Converter

Related to the previous problem at the Turbine Generator, we find no spares to replace the faulty converter module. The picture and the specification of the RTDs Converter Module as below:Related article to view:U3 Generator Stator Terminal Connection R...

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Unit No.3 Generator Stator Terminal Connection RTDs

I got this email last week;During the unit 3 trip on Saturday 29th December, it was noted that one of the Stator terminal connection point cooling water RTD devices 03MKA11CT611 went off scale, returning to normal about 5-6 hours later. Also, all of the time 03MKA11CT612 was sitting at zero. See attached trend.While it might look as if the behavior of CT611 is genuine (not fluctuating or spiking), the Alstom Generator expert doesn’t believe that it can genuinely go that high after the generator tripped. I took the opportunity myself to check the...

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Water Analyser QUZ Cabin

Purpose of the Water Analyser System in Coal Fired Power Plant ● To ensure that steam and water are of a consistently high quality, they are sampled and chemically analysed at several points in the steam water cycle to monitor their quality. The information from the analyses is used by the operator to control the chemical dosing system. ● To detect a circulating water leakage in the tube sheets of the condenser. The steam and water chemical...

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Waltron Sodium Analyser 9001 Series

Three people from Centrionics Sdn Bhd came to my office yesterday and claimed that they are local Waltron representative for this product in Malaysia. The reason why they are here is to promote their product and hopefully will be used in our Coal Fired Power Station. I enclosed here their proposal and specification for you to review.Waltron sodium Analyser ProposalWaltron sodium Analyser SpecificationSince we have problem on Rosemount Sodium Analyser...

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Electrochlorination Plant (ECP) Flow Switch

Called by operation to check ECP no.1 flow switch failed at stream A. From operation feedback, ECP No 1 tripped on no flow on stream A. Operation tried putting ECP No 1 in service early morning today. It could be the following:-1. Flow switch faulty. Based on our discussion our instrument team (C&I) worked on the flow switch last Saturday. 2. Actual no flow due to wrong isolation, clogging of the inlet pipe, clogging of the outlet pipe....

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Combustion Air Flow

Even today is Saturday, I am going to my office to finish some paper work which need to be submitted end of next week. Also get bored at home and need to do better things. I am not posting my work for today, but this data or report is contributed by my colleague. Regarding of the fluctuating right hand side (RHS) combustion air flow, minor leak was found at air inlet continuous air purge. Some action has been taken to clear the defect. ...

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How to Reboot Microrec

First of all, all breakers should be OFF as per sequence below:1) Upper Level Normal2) Upper Level Standby3) Base Level 14) Base Level 25) Base Level 36) ProtectionThen follow by ON the breakers by this sequence:1) Upper Level Normal2) Base Level 13) Base Level 24) Base Level 35) Protection6) Upper Level StandbyBut remember before you reboot the microrec processor, you must check which upper level normal and upper level standby is active or pursuit (standby) at the ti...

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Manjung Coal Fired 3X700MW Power Plant

Manjung Coal Fired 3X700MW Power PlantProject Description : The Manjung Power Plant, a three-unit, 2100-Megawatt coal-fired power station. Each 700-Megawatt unit consists of a steam generating boiler, high pressure steam turbine with condenser, a generator, other equipment for electrical supplies, and plant controls which incorporate a high degree of automation and safety protection. The Manjung Plant also features the first triple-flue stack...

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