System Reconfiguration Strategy For Shipboard Power Systems Using MultiAgent Systems

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System Reconfiguration Strategy For Shipboard
Power Systems Using Multi-Agent Systems
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Outline

• Introduction
• Multi-Agent System
• System Reconfiguration
• Test System Implementation
• Future Work
• Acknowledgement

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Introduction

• Three-Step Procedure
• Fault detection and isolation
• Circuit reconfiguration
• System back to normal

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Multi-Agent System

• Characteristics
• Reactivity
• Autonomy
• Social Ability
• Intelligence
• Mobility (advanced)
• Adaptability (advanced)

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System Reconfiguration

• Objective
• Restore load as soon as possible
• Restore key loads with higher priority
• Restore as much load as possible
• Operate as few switches as possible

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System Reconfiguration

• Constraints
• No components are overloaded
• Radial constraint must be met
• Constraints of the power source must be met

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System Reconfiguration

• Type of Agents
• Load agents (LAG)
• Sense voltage and current
• Have list of neighboring switches
• Have two level of priority vital and non-vital

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System Reconfiguration

• Type of Agents
• Switch agents (SAG)
• Sense voltage and current
• Have switch connectivity information
• Have available transfer capacity information

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System Reconfiguration

• Type of Agents
• Generator agents (GAG)
• Sense voltage and current
• Have generator capacity information
• Assume ideal power source

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System Reconfiguration

• Restoration Strategy
• Switch lockout

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System Reconfiguration

• Restoration Strategy
• Switch lockout

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System Reconfiguration

• Restoration Strategy
• Activating the reconfiguration process
• When a load agent detects a voltage loss, it will
  send out the request for the restoration to the
  neighboring switch agents.

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System Reconfiguration

• Restoration Strategy
• Reconfiguration negotiation
• 1. Request from load to source
• Both ends of the switch do not have power

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System Reconfiguration
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System Reconfiguration

• Restoration Strategy
• Reconfiguration negotiation
• 1. Request from load to source
• At least one end has power

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System Reconfiguration
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System Reconfiguration

• Restoration Strategy
• Reconfiguration negotiation
• 2. Proposal from generator switch to load

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System Reconfiguration
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System Reconfiguration

• Restoration Strategy
• Reconfiguration negotiation
• 3. Last check from load to boundary switch

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System Reconfiguration
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Test System Implementation
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Future Work

• Improve the algorithm to handle more complicated
  situations
• Include intentional islanding into the algorithm
• Improve system implementation
• Test with more complicated power systems

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Acknowledgement

• ONR Funds N00014-02-1-0623 and N00014-03-1-0744