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Waddell 230kV Switchyard: Principles of Performance for Repair

Fault Location

Transformer

Bus

230,000 volts

Switches

Agenda Number 6.

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Electrical Fault

Transformer 7A experienced an electrical fault that caused it to shut down.

The fault was originated with the C-Phase bus.

Electrical Fault

•Extremely dangerous failure •Additional damage may occur

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Electrical Fault

Normal Operation

Transformer 7B

Transformer 7A

Two pumps on each 

transformer

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After Fault Condition

Transformer 7B

Transformer 7A

Four pumps on one 

transformer

Principles of Performance in Project

Manage Assets to ensure system reliability

Build relationships among work groups: Internal Leadership

Involve all departments upfront: Improved Project Development

Achieve environmental excellence

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Multiple Groups Involved in Repair

Project Management

Waddell

Maintenance Engineering

Mechanical Maintenance

Purchasing

Safety

Environmental

Machine Shop

Engineering Resources

Warehouse

Planning

CAP and Global companies:MEPPI and CGIT

CAP

MEPPI

CGIT

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Sole Sources: MEPPI and CGIT

CGIT Compressed Gas

Insulated Transmission

MEPPI Mitsubishi Electric

Power Products Inc

Existing Conditions

Transformer

BusSwitches

Surge Arrestors

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Schedule

Team PlanningJanuary

2011

Award Contracts May 2011

Phase 1 June 2011

Phase 2March 2012

World Events during Planning

Team PlanningJan 2011

Major Earthquake,

Tsunami, and Nuclear Crisis in

Japan March 2011

Award Contracts May 2011

Phase 1 June 2011

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Phase 1: Repair of Surge Arrestors

Repair

Phase 2:Refurbished Surge Arrestors

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Phase 2: C Phase Bus

Phase 2: Install

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Phase 2: Working among the new switches

Phase 2: Flange Cleaning and Desiccant Replacement

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Phase 2:Preparing the Transformer for Test Conditions

Hi Pot Test Equipment

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Test Equipment connected to Substation

Teamwork for CAP’s Improved Reliability