8/6/2019 Technical Improvement Proposal for Hydro Power SG.pasiR Malaysia Final

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Technical Improvement Proposal

ForHydro Power SG.PASIRMalaysia

(1760KW)

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1. General information of Power station

1.1 Site information

Design head: 180m

Design water flow: 0.51m/S

50HZ, 415VAC, 760kW,600rp/m

Turbine: CJA237-W-92/110.5

Generator: SFW-W760-10/1430

1.2 Site problem

Gas in governor pressure tank leakage constantly and the limit switch difficulty to setting,

to be replaced with high reliability and free maintenance.

2. Working scope

To ensure PASIR to run safely and continuously, below items in the form will have to be

replaced

Item Name QTY Remark

1 Governor 16.3MPa , Accumulator with airbag embedded,

control the main hydraulic valve

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3. Technical specifications

3.1 Jet servomotor and deflector improvement

Existed jet servomotor structure

The same 4 bolts

of basement

The same 4 bolts

of basement

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Existed deflector structure

New deflector structure after improvement

Old structure

N C li d 2

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Reference power station photo what we done in Sri Lanka

3.2 Governor

Original governor will be replaced with new type of GCJWT1-6.3 which consists of DSC

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DSC regulator

for governor

GOT

Emergency

shutdown valve

Digital

proportional valve

Governor manual

operating hand shank

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Governor general specification:

Type GCJWT1-6.3

Controller DSC(chip made in USA)

Communication RS485

Display 5.7 GOT (LCD)

Control mode Auto, manual(for temporally using)

Regulation mode Frequency, Water level,

Rated pressure 6.3MPa(with air bag)

Frequency

measurement

1099HZ through proximity sensor via tooth

wheel(resolution 0.001HZ)

Converter Digital Proportional Valve(Made in Italy)

Accumulator 140L, with airbag inside

Oil pump 2 pumps

Oil pump control By DSC controller

Size Refer to layout drawing

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With oil pressure sensor, the pressure will be displayed on GOT.

When power disappear, gas will be kept in air bag and pump oil again to build

pressure when power restore

Governor will automatically shutdown jet and change to manual mode when power

disappear.

Almost without maintenance except termly changing or filtering oil annually,

Governor use DSC as regulator, digital proportional valve as converter. Normally it

should always run in auto mode, but manual mode also available for temporary using

if necessary.

Technical specification of main components

a) DSC(digital signal controller), chip made by Microchip US

b) Water level sensor

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c) Oil pressure sensor

d) Operating Terminal

Name MPM484/MDM Pressure/Differential Pressure Transmitting Controller

ApplicationSuitable for pressure or differential pressure measurements of various

liquids compatiable with stainless steel and viton

Installation local thread installation

Feature150 standard meter,local numeral display, relays setting and

controlling, analog signal output.

Range MPM484-0.1...0~0.01...100MPa MDM4840~50kPa...2M

Supply 220VAC24VDC

Output 0/4~10/20mADC0/1~5/10VDC

Accuracy 0.25%FS | 0.5%FS

http://www.microsensor.cn/english/Webs/Products/Show_Products_Details.asp?id=35http://www.microsensor.cn/english/Webs/Products/Show_Products_Details.asp?id=35

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e) mechanical system diagram

3.3 MIV information

This valve will be opened and closed by servomotor which driving pressure oil comes from

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Layout drawing of governor

DateAmountNo.of Rev.fileSignatureMark

StandardDesign

Revision

Check

Technics Date

Authorize

Courtersign

No Code Name Amount Material Weight Annotation

No sheet

Scale

Total sheet

Dr mark AmountWeight

Dr NO.

CBAS

1 1