Transcript PSERC - Power Systems Engineering Research Center

Power System Monitoring Using
Wireless Substation and SystemWide Communications
Mobile Agent Part
Mladen Kezunovic (P.I.)
Xiangjun Xu
Texas A&M University
PSerc Review Meeting
College Station, March 22, 2002
PSERC
Outline
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PSERC
Introduction
Part I - Summary report
Part II - Technical report
Conclusions
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Part I-Summary report
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PSERC
Introduction
Background
Current Activities
Statement of Work
Activity Schedule
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Introduction
PSERC
Work since December 2001
 Integrating with Circuit Breaker
Monitoring Software
 CLIPS Win32 DLL for embedded applications
 Database systems for small scale
applications
 Applying Agent-Oriented Approach
 Workflow management using software
agents
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Background
PSERC
• System wide communications are
aimed at power system monitoring and
maintenance applications
• MERL’s Concordia mobile agent
software has been applied to solve
system wide communication problems
• Project was Initiated in September
2000 and will end in August 2002
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Current Activities
PSERC
• Integrating with the Circuit Breaker
Monitoring (CBM) software
• Applying agent-oriented approach for
enhancing the circuit breaker
maintenance
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Statement of Work
PSERC
• Study of the mobile agent software
and comparison with other distributed
systems
• Study of the scenarios for application
of the mobile agent software
• Agent-oriented approach applied in the
maintenance process (new)
• Documenting the research results
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Activity Schedule
PSERC
1. Study of the mobile agent software and comparison with other distributed systems
2. Study of the scenarios for application of the mobile agent software
3. Agent-oriented approach applied in the maintenance process
4. Documenting the research results
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Project Status
PSERC
• A prototype system utilizing Concordia for
CB applications has been built earlier
• Real utility data for field demonstration is
missing
• Interfacing to the CB monitoring software as
well as the agent-oriented approach have
been added as a substitute for the filed
demo
• The progress is on schedule
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Publications
PSERC
• M. Kezunovic, X. Xu, D. Wong "AgentOriented
Approach
to
Work
Order
Management
for
Circuit
Breaker
Maintenance", submitted to IEEE PES Summer
Meeting 2002
• M. Kezunovic, X. Xu, D. Wong "Improving
Circuit Breaker Maintenance Management
Tasks by Applying Mobile Agent Software
Technology", submitted to IEEE T&D
Conference 2002, Asia Pacific
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Part II- technical report
PSERC
• Integrating Agent-based software with
Circuit Breaker Monitoring (CBM)
software
• Agent-Oriented approach
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Integrating with CBM Software
PSERC
 CLIPS DLL for embedded applications
• Eliminated the separate expert shell
• Achieved better control over the expert
system engine
• Database systems for small scale
applications
• A good database system is important for
both the developments and applications
• Compared Interbase 6, SQL Anywhere 7
and MySQL 3.23
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Retrieving CBM Results
PSERC
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Agent-Oriented Approach
PSERC
• Proactive software agents rather than
just reactive
• Better assisting the maintenance crew
• Higher level abstraction and
encapsulation
• Better software structure
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Agent-Oriented Approach
(cont’d)
PSERC
• Agent sensors
• subscribing to events of interest
• Agent effectors
• callback functions
External
events
Actions
Facts
Inference
Engine
Callback
Rule base
functions
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Agent-Oriented Approach
(Workflow management)
PSERC
• Automatically driving the workflow to
complete a work order
• The workflow is modeled by rules
• The agent will enter a “sleep” state if
the conditions of the rule are not met
• By subscribing to events of interest,
the agent “senses” the outside world
and acts correspondingly
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Conclusions
PSERC
• A prototype system utilizing Concordia
mobile agent software for circuit breaker
maintenance has been built.
• Interfacing between the real time CBM
system and agent-based system for systemwide communications has been
implemented
• Real application scenarios provided by
utilities are still not available.
• Current focus has shifted to investigating
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the agent-oriented approach.