Murty V.V.S. Yalla of Beckwith Electric Company, Inc.

The PES and IAS Chapters will sponsor a technical seminar on the topic of Generator and Transformer Protection.  The session will be held on Friday, January 23, 2015 at PSE&G’s Hadley Road Facility, 4000 Hadley Road, South Plainfield, NJ  07080-1192.

Topic:

The seminar will cover Generator Protection including: 

• Review of Grounding Techniques and Types of Generator Connections

• Generator Protection as per IEEE C37.102, C37.101, C37.106 and NERC PRC standards

• Negative Sequence Protection Down to Continuous Rating

• 100% Stator Ground Fault – Third Harmonic vs. Injection Method

• Field Ground Fault detection with Injection Method

• Overexcitation (V/Hz) protection

• Low Directional Power Sensitivity Requirements for Sequential Tripping

• Distance Element Enhancements - Load Encroachment Blinding, Power Swing Blocking

• Out-of-Step Protection

• Loss of Field - Element Design to Match Machine Capability Curves, MEL and Steady State Stability

• Abnormal Frequency Protection

The seminar will cover Transformer Protection including:

• Modes of Transformer Failures

• Types of Protection: Phase & Ground Differential, Overcurrent, Overexcitation,

• Unique Factors for Differential Protection

  • Current Magnitude/Phase Differences

  • Effect on Differential Protection: In-Rush Phenomena, CT Saturation, Overexcitation

  • Use of a Ground Differential Element for Sensitive Ground Fault Protection

• Advanced Transformer Inrush and Overexcitation Detection providing Improved Security

• Current Summing for Transformer Overcurrent Protection in Breaker and a Half/Ring bus

• Through-Fault Accumulation & Alarm

Biography:

Dr. Yalla has been with Beckwith Electric Co. since 1989 and presently holds the position of President. He received a BSEE (JNTU) and MSEE (IIT, Kanpur) from India and a Ph.D. in EE from the University of New Brunswick, Canada in 1987. From 1988 to 1989, Dr. Yalla taught and conducted research on digital power system protection at Memorial University in Newfoundland, Canada. He has published several research papers in international journals on digital protection. He holds five U.S. patents in the areas of digital controls and protective relays.

Dr. Yalla is the Deputy Technical Advisor to the United States National Committee (USNC) of the International Electrotechnical Commission (IEC, Geneva, Switzerland) Technical Committee 95. He is the chairman of the IEC TC 95 MT4 which is developing functional standards for measuring relays and protection equipment including distance protection (IEC 60255-121:2014), overcurrent protection (IEC 60255-151:2009), thermal protection (IEC 60255-149:2013) and differential protection (IEC 60255-187). He was a U.S. delegate to the International Council on Large Electric Systems (CIGRÈ, Paris, France) Working Groups on Modern Techniques for Protecting and Monitoring Generating Plants and Power Transformers. He was also a member of the North American Electric Reliability Corporation (NERC) System Protection and Control Subcommittee (SPCS).

In 2006, Dr. Yalla was elected to Fellow grade by the IEEE for his contributions in computer relays for power systems. He serves on the IEEE PES Fellows Committee. He is presently the Chair of the Rotating Machinery Protection Subcommittee of the Power System Relaying Committee. He was the chairman of the working group which developed IEEE Standard C37.102-2006 "Guide for AC Generator Protection." He co-authored an IEEE PES tutorial on the "Protection of Synchronous Generators." He chaired the working group which received the IEEE PES Working Group Recognition Award for an outstanding technical report "Application of Peer-to-Peer Communications for Protective Relaying" at the IEEE PES GM in Denver, Colorado in June 2004. He received the IEEE Florida Council Outstanding Engineer Award in 2005. He received the IEC 1906 Award in 2010 which honors the IEC experts around the world in recognizing their exceptional recent achievements and contributions to the IEC committees. Dr. Yalla also received the businessman of the year award from Indo-US chamber of commerce in 2013.

Email:

Address:6190 118th Avenue North, , Largo, Florida, United States, 33773

Murty V.V.S. Yalla of Beckwith Electric Company, Inc.

Biography:

Email:

Address:Largo, Florida, United States

Murty V.V.S. Yalla of Beckwith Electric Company, Inc.

Biography:

Email:

Address:Largo, Florida, United States