Download - Predictive Relay Technology
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The Silent Revolution
by Mario Kuisis
Predictive Relay Technology
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In the world of technology
Significant milestones are reached
Sometimes with great fanfare
Sometimes almost going unnoticed
But always with a lasting impact
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Predictive Relay Technology
Represents such a milestone, and
Is in danger of going unnoticed, but
Deserves more attention!
Why?
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Cost savings and efficiency
Brought about by
Reduced day-to-day maintenance costs
Reduced plant downtime
Prevention of failures
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How?
By embracing predictive diagnostics in the form of
Predictive Relay Technology
To understand a predictive relay, let’s use an illustration close to home
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What is a Predictive Relay?
Imagine you are in good health . . . with a permanently connected micro ECG, also monitoring your temperature,
breathing, perspiration rate, etc., with micro-computer aided diagnostics, and GSM contact to your heart specialist. What are your chances of heart failure?
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Chances of heart failure in this situation are certainly minimised, more likely totally eliminated, provided the specialist reads the danger signals gives you adequate warning and good advice for corrective action which you take seriously.
What is a Predictive Relay?
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What is a Predictive Relay?
The combination of the micro ECG machine the sensors for temperature, etc. the micro-computer the diagnostic software & specialist the GSM modem together constitute a Predictive
Relay
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What is a Predictive Relay?
A predictive relay continuously monitors condition together with influencing operational & environmental parameters which it stores, analyses, trends and interprets in order to diagnose the present status and make a prognosis of future condition. If life-threatening deterioration is predicted it communicates programmed alarm or preventative action.
Definition of a Predictive Relay
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Relating this to power station plant
Electrical machines also have “hearts” Recent research has produced the
equivalent of the ECG machine and diagnostics software
Robust micro-computers with extensive data storage and processing power are common
Sensor technology has advanced equally Communication is possible almost
anywhere
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This means
Predictive relay technology is now a commercial reality for most items of critical electrical power station plant
This includes Generators Motors Transformers Switchgear Peripheral MV, HV & EHV equipment
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Why is this so important?
It is customary to invest heavily in protective relays
No electrical system is built without them
But these serve only to limit damage They are a form of insurance We assume the fault “will happen” Why not apply the same approach to
prevent the fault in the first place?
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A revolutionary solution
Because it has never before been possible in the form of a
Practical, Economic Device!
Until now, this has been the preserveof costly, risky and complex special periodic tests of limited value requiring experts to interpret
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How does this help?
The diagnostics available from the device pinpoints the defect
Limited repair or refurbishment is quicker and cheaper than complete repair or replacement – sometimes nil!
Downside system damage is prevented System uptime is not compromised
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Why has it not been done before?
The technological hurdles are enormous
Measurement sensitivity
Extreme environments
High level data processing and storage
Advanced signal processing techniques
Need for compatibility with plant systems
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Ability to measure all parameters
Need for flexible communication options
Need for robustness
Need for absolute reliability
Calibration issues
Need for simplicity
Why has it not been done before?
These hurdles have been overcome!
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Status of the technology
Predictive relay technology is well established in a large number of 1st world countries
Benefits have been proven through identification of a large number of incipient faults which were exposed on pre-emptive removal and inspection
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Illustration
Examples: predictive relay applications
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How to take advantage
First and foremost, a new mindset
Don’t just limit fault damage with a protective relay
Prevent the fault with a Predictive Relay
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Summary A revolutionary technological milestone
has been reached Faults on key power station plant can
now be predicted and avoided This is achieved by supplementing
Protective Relays with Predictive Relays The technology is fully commercialised,
proven and readily available
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Thank you
?