and Misoperations Session 3: Management Involvement W E C C E - - PowerPoint PPT Presentation

Webinar Series: Reduction of Unknown Outages and Misoperations

Session 3: Management Involvement

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Welcome

• Webinar is being recorded
• All attendees are muted upon entry. To unmute

yourself either:

– Press *6 on your telephone – Click the microphone icon on your webex panel (red means muted)

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Issue Identified

WECC identified issue with unknown transmission outages and protection system misoperations.

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Western Interconnection

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Transmission Outages Protection System Misoperations

Distribution of Entities

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Transmission Outages Protection System Misoperations

Poll

WECC is considering a survey and report process that would provide entities with their unknown rates and how they compare to their peers, would you be interested in participating?

• Yes
• No
• N/A (not a WECC entity or have already participated in an earlier poll)

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Best Performers

• AltaLink
• Arizona Electric

Power Cooperative

• Bonneville Power

Administration

• Comisión Federal

de Electricidad

• Imperial Irrigation

District

• Pacific Gas and

Electric Company

• Platte River Power

Authority

• Portland General

Electric Company

• Public Utility

District No. 2 of Grant County, Washington

• Salt River Project
• Seattle City Light
• Tri-State Generation

and Transmission Association

• Tucson Electric

Power

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Summary of Entities Practices

18 practices across 4 themes

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Webinar Series

• Session 1: Process and

Documentation

– Bonneville Power Administration – AltaLink

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Webinar Series

• Session 2: Outage

Analytics

– Portland General Electric – Tucson Electric Power

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Webinar Series

• Session 3: Management Involvement

– Platte River Power Authority – Arizona Electric Power Cooperative

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Platte River Power Authority

Tyson Archie, Compliance Specialist

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PRPA Overview

• Municipally-owned

generation & transmission utility

• Located in northern front

range of Colorado

• 403 miles of 115 kV and 230

kV transmission lines

• 26 substations
• 247 employees

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Management Involvement

• Preliminary Disturbance

Report distributed to Protection Engineers, Engineering Managers, Compliance Dept as well as Senior Management

• Ensures all levels of
• rganization are aware an
• peration/event has occurred
• Initiates investigation and

compliance tracking activities

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Becomes High Priority

• Standard practice to conduct an

immediate line patrol and investigation

• Substation maintenance, system
• perations, and engineering

department work together to return system to normal as soon as possible

• 3rd party review on misoperations

before Unknown Cause can be reported

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Process Documentation

• All operations are investigated

using documented policies and

• procedures. Reports are drafted

and delivered to management

• Metrics and Performance Goals

listed in Disturbance Analysis Procedure that correlate to WECC Risk Factor Criteria

• Practices have evolved over

several years

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Culture

• Longstanding culture of promoting reliability
• Continued investment in infrastructure as well as

proactive maintenance schedule allows systems to operate at a high level

• Management engaged in processes and decision

making

• Ownership from all levels in keeping outages and

especially unknown outages to a minimum

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Relay Replacement

• Unknown Outage during blizzard last Spring
• Existing electro-mechanical differential transformer relay

misoperated due to a transmission line fault

• Thorough internal investigation as well as 3rd party review
• No cause could be determined
• Management agreed that upgrading relay to microprocessor type

was appropriate corrective action for system reliability, and to allow additional data gathering for future operations

• Multiple departments rearranged schedules to accommodate relay

upgrade in a timely manner

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Questions

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Arizona Electric Power Cooperative

John Shaver Operations Reliability Compliance Administrator

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Disturbance Resolution

Misoperation Identification

• Disturbance occurs

– System Operators respond accordingly. – System Operators notify appropriate entities and personnel. – Actions are taken to return system to normal.

• Analysis of disturbance begins

– Preliminary disturbance report is created. – Distributed to management, field engineers, operations engineer, and affected member cooperative(s).

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Disturbance Resolution

Misoperation Identification

• System Control Manager reviews

– Consults with System Operators. – Responds to initial inquiries from member cooperative(s).

• Engineering Analysis

– Determine root cause of disturbance.

• Weather
• Foreign interference
• Equipment Failure
• Misoperation
• Human Error, etc.

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Playful Foxes Cause Major Outage

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Disturbance Resolution

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• Resolve Identified Issues

– Modify relay settings, if necessary. – Make repairs to equipment, if necessary. – Review lessons learned from outage. – Determine and implement preventive measures, if appropriate. – Provide training, if necessary.

Disturbance Resolution

• Operations Engineer creates final disturbance

report

– Receives input from all appropriate departments. – Interacts with members during the process.

• Final disturbance report is complete

– Report distributed to affected entities. – Shared with appropriate departments. – Applicable reporting is completed (e.g. TADS).

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Disturbance Resolution

• Accountability

– Director of System Operations presents all disturbances and associated resolutions from previous month at monthly board meeting. – All concerns are addressed. – Input from members is considered and implemented, if appropriate.

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Disturbance Resolution

• Approach to disturbance resolution

– All disturbances expected to be resolved and finalized within a month of occurring. – Accountability from membership drives the resolution process. – “Unknown” is not an option.

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Questions

Recordings:

https://www.wecc.biz/Administrative/Reduction%20of%2 0Unknown%20Outages%20Webinar%20Recording%20Link s.pdf

Webinar content questions: Maggie Peacock (801) 819-7621 mpeacock@wecc.biz

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What’s next

• Positive feedback on survey/report
• Will provide entities their position with the

survey

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