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Power-User
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SCADA System for 2*2 MW Hydropower

11/07/2011 11:16 PM

HI,

I am designing 2*2 MW hydropower in Nepal. Does it need SCADA? I think only PLC may do as well - as SCADA is very costly.

sks

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Guru
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#1

Re: SCADA system for 2*2 MW hydropower

11/07/2011 11:23 PM

How about two potentiometers, a synchroscope, and some miscellaneous confetti, such as a pair of humongous butterfly valves?

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Guru
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#2

Re: SCADA system for 2*2 MW hydropower

11/08/2011 4:25 AM

What do you want the SCADA system to do? We can't 2nd guess what you want.

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#3
In reply to #2

Re: SCADA system for 2*2 MW hydropower

11/08/2011 5:28 AM

for the automation - as for dedicated controls can be done through supervisory control throuhg a cental server by an operator.

regards,

sks

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#4

Re: SCADA system for 2*2 MW hydropower

11/08/2011 6:52 AM

yep, you can make a very fancy SCADA interface to monitor in your computer (or someone Else's) the processes, and hope you don't have any virus to blow your work... I have a thing about remote controlling, and for that not the right person to comment about this matters. I personally find that if you have a critical procedure to monitor don't do it from a distance (unless very necessary) . but thats just me

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Guru

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#5

Re: SCADA System for 2*2 MW Hydropower

11/08/2011 9:13 AM

I think that you should learn the difference between the two.

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#10
In reply to #5

Re: SCADA System for 2*2 MW Hydropower

11/10/2011 5:11 AM

yes... but sometimes is not easy

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Guru

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#6

Re: SCADA System for 2*2 MW Hydropower

11/08/2011 10:36 AM

How many workers, installation size and money are factors to consider.

SCADA doesn't necessarily mean you open yourself up to outside threats if the system is not connected to a public communications grid. Point access can be controlled through physical security which requires less pay for fewer people.

If the system is completely autonomous then SCADA can save money in the long run by reducing the manpower to run the facility, within certified standards of course.

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Participant

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#7

Re: SCADA System for 2*2 MW Hydropower

11/09/2011 12:49 AM

Hi

Before Answering your question, I would like to know what is the aim of PLC system for your project, put it other way, what all the monitoring,controls, and reporting you are looking from your project.

To answer above questions,

Can you send me your FDS or functional design specification?

Based on that I can help you on deciding whether you need SCADA and what all the features you may require?

Regards

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#8

Re: SCADA System for 2*2 MW Hydropower

11/09/2011 1:40 AM

Pls. consider this investment ( including maintenance of SCADA ) against the information which is going to be available and utility of said information. Furthermore all panels from where parameters are to be monitored, must have suitable signal transmmitting mechanism like transducers, potential free contact etc. This MIGHT add additional cost to the panels concerned.

Ashok Toshniwal, Bangalore, India.

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#9

Re: SCADA System for 2*2 MW Hydropower

11/09/2011 8:25 AM

You will need an automation system controlled by PLC's or DCS unit, the SCADA function can be done by any of them.

What you need is a design engineering company to develop the engineering including the control system.

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Guru

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#11

Re: SCADA System for 2*2 MW Hydropower

11/10/2011 8:27 AM

You do not need SCADA to do remote control/data gathering.

I did remote control of 2 x 20 MW gas turbines 25 years ago via a telephone cable using a CONEX link which was really a 2400 bit/second serial link "UART integrated circuit" with some cunning circuitry to get 16 digital signals & 4 analogs transferred.

Also, 20 years ago I did remote SCADA with 2400 baud modem on one gas turbine ( about 256 I/O with 16 analogs) which talked to PLC serial (programmer, but with fenced register write) data interface. The SCADA computer was remote. It disc-logged all digital I/O changes and analogs as well as the standard alarms.

Modern SCADA systems can cope with multiple PLCs and telemetry links to them - your simple sets might be just a supplementary task on an existing remote SCADA computer.

As has been commented, it will depend on how remote and accessible your units are and if there is anyone on-site to observe what happens.

Recorded information on what happened recently and what happened when the unit failed may be be worth a lot of money (so that the technician knows where the fault occurred and has best set of tools and spares when he gets to site) when compared to the cost of each visit to site to locate or correct a fault.

If you are using a PLC or SCADA system I recommend you try very hard contractually to get a system the user (you) can document & modify - I remember a contract where every simple PLC change "in service" cost £1500 upwards because the ladder etc was undocumented to us and "copyright" of the subcontractor.

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67model (1); ashoktoshniwal (1); cuba_pete (1); electronick (2); lyn (1); masterscada (1); sauravbabu (1); TonyS (1); Tornado (1); vargaalex (1)

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