Automated Fault Analysis System MiAFAS
Transcript of Automated Fault Analysis System MiAFAS
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Automated Fault Analysis System MiAFAS
Power Research and Development Consultants Pvt. Ltd
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Topics of Discussion
• Automated Fault Analysis System (AFAS)
• MiAFAS
• Case Study
• Summary
• Discussions
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AUTOMATED FAULT ANALYSIS SYSTEM (AFAS)
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Why AFAS
• Complexities of power systems are increasing
• Faults are inherent to the Power Systems
• Fault Analysis/ Diagnosis is very important to power system operations
• Manual Processes are time consuming and may be inaccurate
• Need expertise
Fast and Accurate Fault Assessment is the need
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What is required
System that facilitates:
• Automatic retrieval of disturbance files at a common location
• Automatic fault diagnosis, report generation and intimation to concerned personnel
• Substation and system level analysis for a fault
• Better fault location computation and hence facilitates faster fault clearing
AFAS streamlines the process of fault diagnosis
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What is AFAS
• Digital System to correlate and analyze complex data about power system faults and disturbances for,
– Root Cause Analysis
– Fault Type and location
– Cross checking Protection Coordination
• Information extracted from AFAS will aide
– Operating personnel
– Protection engineers
– Maintenance crew
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What’s in for Whom
Operation & Maintenance Group – Quick response due to more accurate fault location
– Proactive maintenance
– Fault statistics for optimizing maintenance schedule
– Reduced repair and maintenance efforts
– Improved reliability
Protection Group – Determine adequacy of relay operation
– Reduction in time taken for fault analysis
– Meeting regulatory requirements
– Panoramic view of the faults
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Other Benefits
Efficient Data Utilization
Understanding Cause of Failure
Montioring Device Performance
Relay Setting Verification
Process Automation
Effective Use of Resources
Improving Reliability
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AFAS – Components
- Relays
– Analog Data
– Digital Data
• Disturbance Files
Remote Access System
• Communication
System
Data Transmission
• Analysis System
Data Processing
– Relay to SDC
– SDC to Main DC
– File Diagnosis
– Reporting
Measurement, Communication and Analysis
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MIAFAS
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MiAFAS
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MiAFAS Engine
Analysis Results
My intelligent Automated
Fault Analysis System
(MiAFAS)
DR Data from field
System parameters
Connectivity info
System information “add” Intelligence
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Major Types of analysis
• Fault Detection and Classification
– Evolving faults
• Analysis Summary
• Fault location
– Single and double end
• Digital analysis
– Sequence of events
• Relay performance validation
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Major Types of Analysis Auto Reclose/
Breaker Operation
Single/ Three Phase
Successful/ Unsuccessful/ TOR
PD Trip
Relay Operation Analysis
Line
Differential
Distance relay, Carrier trip
SOTF, STUB
Power Swing, Load Encroachment
Over voltage
LBB
Transformer/ Reactor
Differential, REF
DOC/DEF/ Backup Imp
Over flux
LBB
Busbar
Differential
LBB
CT/CVT Analysis
Performance Assessment
CT Saturation
CVT Unbalance
Ferroresonance detection
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Supports
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MiAFAS – Levels of Analysis
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MiAFAS – Modes of Operation
• Online:
– Analysis is done Automatically
– Reports are generated Automatically
– SMS and email alerts
• Offline:
– On-demand execution of selected files
– No SMS and email alert
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Typical Response Time Station DC Zonal Centre
Main Centre AFAS server Fault Report
Polling
RAS processing AFAS processing Report generation
Communication
Network
Com
mu
nic
atio
n
Netw
ork
Fault to operator Intimation in just “5 min”
3.5 min
1.5 min