Texas A&M University Conference for Protective Relay Engineers

Prior to the 58th Annual Conference for Protective Relay Engineers, please join us at the College Station Hilton Hotel, College Station, TX. Enjoy breakfast and lunch while receiving expertise on the following:

  • Study Blackout Avoidance through modern protection and control concepts.
  • Learn strategies to Upgrade Power Plant Protection to the Latest IEEE guides and requirements of the insurance industry.
  • Learn power plant Motor Bus Transfer made easy, smooth and reliable.
  • Discover the subtle yet Critical Transformer Protection element advances afforded by digital technology.
  • Learn how NOT to "Nuisance Trip" your DGs.
  • The session includes Three (3) Technical Papers and Two (2) Tutorials!
Session Outline
Monday, April 4, 2005
8:00-8:30 AM Check In
College Station Hilton Hotel

Ballroom 7
Complimentary Continental Breakfast
8:30-9:15 "Power Plant Protection and Control Strategies for Blackout Avoidance"
by Charles Mozina
9:15-9:30 Q&A
9:30-10:15 "Upgrade of Generator Protection to Comply with IEEE Guides"
by Thomas Beckwith
10:15-10:30 Break
10:30-12:00 "Upgrade of Generator Protection to Comply with IEEE Guides" CONTINUED
by Thomas Beckwith
12:00-12:15 Q&A
12:15-1:00 Complimentary Lunch
1:00-1:45 "Motor Bus Transfer: Considerations and Methods"
by Clark Shaughnessy
1:45-2:00 Q&A
2:00-2:45 "Advanced Concepts in Transformer Protection"
by Clark Shaughnessy
2:45-3:00 Break
3:00-4:30 "Advanced Concepts in Transformer Protection" CONTINUED
by Clark Shaughnessy
4:30-4:45 Q&A
4:45-5:30 "How to Nuisance Trip Distributed Generation"
by Charles Mozina
5:30-5:45 Q&A

 

Additional Session Information

"Power Plant Protection and Control Strategies for Blackout Avoidance"
by Charles Mozina

Technical paper covering the following topics:

  • Coordination of generator protection with the AVR (limiters and controls)
  • Explore generator protection tactics to provide security against stable swings and load encroachment
  • Explore generator protection tactics to provide reliability for tripping on unstable swings and local area undervoltage depression brought about by VAr deficit caused by a generator
  • Discuss modern AVR limiter and control functions compared to older legacy systems (advantages), role of power system stabilizer (PSS) and positive/negative field forcing to help maintain generator and system stability
  • Describe effects of voltage depression on AVR control and limiters
  • Response of small versus large machines using field forcing to support voltage during system faults
  • Response of small versus large machines using PSS to maintain stability during system upset
  • Review wide area generator interaction for system voltage support and stability during system upset

"Upgrade of Generator Protection to Comply with IEEE Guides"
by Thomas Beckwith

Tutorial covering the following topics:

  • Latest developments reflected in:
    • Std. 242: Buff Book
    • C37.102: IEEE Guide for Generator Protection
    • C37.101: IEEE Guide for AC Generator Ground Protection
    • C37.106: IEEE Guide for Abnormal Frequency Protection for Power Generating Plants
  • Improved sensitivity
    • Negative sequence
    • 100% stator ground fault
    • Field ground fault
    • Loss of Field
  • Dual Mho Element to ride through system swings
  • Voltage supervision for fast trip release
    • Overexcitation
    • Reverse power
  • Improved Security
    • Distance Element Enhancements
  • Load encroachment blinding
  • Power swing blocking (for stable swings)
  • New protections
    • Inadvertent energizing
    • VT fuse loss (integrated)
  • Special applications unique to generators
    • Generator breaker failure
  • Pole flashover (prior to syncing)

"Motor Bus Transfer: Considerations and Methods"
by Clark Shaughnessy

Technical paper covering the following topics:

Addresses the types of motor bus transfer (MBT), technical challenges and analyzes the thought process for proper setting creation that is involved when implementing a MBT system for power plant spinning motor auxiliary buses or industrial plant spinning motor buses. Classic approaches are described and conditions are explored that make these transfers proper or improper. Advanced implementations of MBT methodology are explored that use high speed sensing, decision making and breaker control to account for the dynamic conditions in and about the plant, such as, motor dispatch and loading, new source conditions and faults.

Describes an automatic high-speed system to transfer loads from the interrupted bus section to the alternate bus with no interruption of service to the transferred bus section loads. The system has been successfully used at a number of power plant and industrial facilities. Operating experience at these facilities will be discussed in the paper. The system is designed to provide a high-speed fast transfer immediately after separation. A unique feature of the system is that if the initial fast transfer is unsuccessful a second in-phase transfer attempt is made at the first phase coincidence (first zero degree crossing). The paper describes the measurement technique that is used to predict phase angle, slip frequency and voltage decay at the time of closure to the alternate source. It also addresses the setting and application requirements to avoid motor damage due to shaft torque and inrush current. The transfer system is also equipped with a residual voltage transfer backup scheme to address the case where a severe fault near the plant disrupts the voltage on bus being transferred to the point where high-speed transfer and in-phase transfer attempts are unsuccessful.

"Advanced Concepts in Transformer Protection"
by Clark Shaughnessy

Tutorial covering the following topics:

  • Review Protection Objectives for Transformers
    • Internal Short Circuit
  • Phase Faults
  • Ground Faults
    • System Short Circuit Back Up Protection
  • Buses and Lines
    • Phase Faults
    • Ground Faults
    • Abnormal Operating Conditions
    • Open circuits
    • Overexcitation
    • Abnormal Frequency
    • Abnormal Voltage
    • Breaker Failure
    • Overload
    • Geo-magnetically induced currents (GIC)
  • Review Connection and Grounding
  • What Makes Transformer Differential Protection a Challenge?
    • CT Ratio, Saturation, Remnance and Tolerance
    • Polarity, Winding Arrangement and Angular Displacement
    • Transformation and LTC-caused Mismatch
    • Zero Sequence Current Elimination
    • Inrush Phenomena
    • Harmonic Content Availability
    • Overexcitation Pnenomena
    • Internal Ground Fault Sensitivity
    • Switch Onto Fault Considerations
  • Advanced Transformer Protection Concepts and Element Design
  • Advanced Installation and Commissioning Tools
  • Commissioning Lab

"How to Nuisance Trip Distributed Generation"
by Charles Mozina

Technical paper covering the following topics:

The protection system at the DG interconnection must provide security to allow the DG to be connected to the utility grid, as well as reliably disconnect the DG from the utility grid for a variety of reasons: loss of utility supply to the feeder (anti-islanding), shunt faults on the utility system, abnormal operation conditions and power import/export restrictions.

Most protection systems are set to trip the DG offline in less than one second, and often much quicker (10-30 cycles). Events can occur on the system and within the DG facility, however, that may lead to undesired trips. These trips occur due to protection elements being set with very close tolerances and the interplay of events that include power surges from cycling of loads within a DG facility, faults within the DG facility that should be cleared by other means, and misapplication of protective elements.
We will various scenarios that can lead to nuisance tripping of DGs that result from: a) power protection sensitivity and directionality with fluctuating DG site load; b) sensitivity and directionality issues for phase fault protection; c) DG facility protection and DG interconnection protection coordination.

We will highlight a feature of modern protective systems that is a event analysis aid, waveform capture, applied at the point of common coupling at the DG facility and the utility. By examining the captured waveforms for the various scenarios-including pre-event currents, voltages and power flows-conclusions can be made as to where the event originated (in the DG facility or on the utility grid), and if the trip decision was correct. If the trip is deemed a nuisance trip, the captured waveforms can help determine a remedial course of action: setting adjustment (pick up and time delay), use of protective elements (directionalizing, use of voltage control) and plant operations modifications (adjustment of generator bias, schemes to stagger tripping of large blocks of load).


WHEN:

Monday, April 4, 2005
8:00 AM - 5:45 PM
WHERE:

College Station Hilton Hotel
Ballroom 7
801 University Drive East
College Station, TX 77840-2116
(979) 693-7500
Click Here for additional Hotel Info

COST:
  Free! Just register below.
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Instructors

Charles Mozina

Charles (Chuck) Mozina is a consultant for Beckwith Electric specializing in system protection. Prior to that, he had been with Beckwith Electric as Application Manager of Protection Products and Systems. He has over 25 years of experience as a protection engineer and manager of system protection for a major utility.

Chuck is an active member of the IEEE PSRC and is the past chairman of the Rotating Machinery Subcommittee. He is active in the IEEE IAS I&CPS committee, which addresses industrial system protection. He is the past US representative to the CIGRE Study Committee 34 on System Protection and chaired a CIGRE working group on generator protection. He also chaired the IEEE task force that produced the tutorial “The Protection of Synchronous Generators,” which won PSRC’s 1995 Outstanding Working Group Award.

Chuck has a BSEE and has authored numerous papers and articles on protective relaying. He is also a former instructor in the Graduate School of Electrical Engineering at Cleveland State University.

Thomas R. Beckwith

Tom Beckwith is President of Beckwith Electric Company. In this capacity, he provides the leadership to develop and implement strategies for product development, marketing, manufacturing, quality control and staffing.

Tom has over thirty years of experience in the power industry, encompassing the fields of sales, management and engineering. He has held positions as VP of Sales and Marketing for RFL Electronics in New Jersey, Consultant for Bectech International and General Manager of the International Division for Basler Electric. Prior to that, Tom had worked for Beckwith Electric for over twenty-two years, beginning as a Product Engineer and Production Manager, to later becoming VP of Marketing and President of the Beckwith Engineering Services and Training division.

Tom has a Bachelor of Science degree in Electrical Engineering from Case Western Reserve University and a Master of Business Administration (MBA) degree from the University of South Florida. He is a member of IEEE and the Power Systems Relaying Committee and is active in various working groups.

Clark Shaughnessy

Clark Shaughnessy is Customer Technical Support Manager of Beckwith Electric and has also been Regional Sales Manager of Asia since 1999.

Clark has over thirty years of experience in the power industry, along with extensive international marketing expertise. Prior to joining Beckwith Electric, Clark was the Asia Segment Manager for General Electric Company’s Power Management division where he was instrumental in expanding sales of protection and control products and systems. Clark also had been employed by Florida Power & Light Company for over five years, first as a supervisor of system protection engineering services and later as a division system protection manager. Prior to that, he had been with General Electric Company for fifteen years as an engineer in the transmission and distribution fields.

Clark is a graduate of the General Electric Advanced Power System Engineering Course. He has a BSEE from the University of Wisconsin in Milwaukee, Wisconsin and an MSEE from Union College in New York. He is a member of the IEEE.

 

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