Wayne G. Hartmann

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Industrial plant feeder protection challenges can occur from events within the plant and on the bulk power system to which the plant is connected. Advanced feeder protection platforms can help improve reliability (security and dependability), selectivity and extend protective functionality using advanced applications.
In pulp and paper plants, power transformers play a critical role in process continuity. These transformers are subject to internal short circuits, external short circuits, and abnormal operating conditions. The following protection challenges to power transformers will be explored, and methods to improve the protection are provided. First, remanence in a(More)
The uniqueness of the electrical environment (asynchronous connection to power system, variable frequency operation, and harmonics) on the output of adjustable-speed drives (ASDs) requires special consideration to be given to the motor protection. The Working Group has investigated and addressed these concerns. This paper announces the report on the(More)
Ground faults in generator stator and field/rotor circuits are serious events that can lead to damage, costly repair, extended outage and loss of revenue. This paper explores advances in field/rotor circuit ground fault and stator ground fault protection. These advanced protection strategies employ AC injection and other tactics to provide benefits in(More)
Pumped storage hydroelectric (PSH) units provide protection complexity not encountered in conventional generating plants. As PSH units operate in both generating and pumping modes, attention must be given to the frequency and phase rotation presented to the relaying. In some PSH applications, additional relays and switching of VT and CT connections are(More)
Distribution Automation (DA) is part of today's evolution of the distribution system. Many utilities already have some Distribution Automation applications (e.g., remote controlling of feeder switches and breakers, automatic reconfiguration, fault detection, fault location, voltage and reactive power control, Advanced Metering Infrastructure (AMI), etc.)(More)
Distributed Energy Resource (DER) continues to make inroads into our distribution systems. This paper explores the impact of DER on distribution Volt/VAr optimization (VVO). Presented is a novel method of coordinating on-load tapchanger (OLTC) to line capacitor (CAP) banks and active VAr regulating distributed energy resource (DER). OLTC controls are used(More)
Ground faults in field/rotor and generator stator circuits are serious events that can lead to damage, costly repair, extended outages, and loss of revenue. This paper explores advances in field/rotor circuit ground fault and stator ground fault protection. These advanced protection strategies employ ac injection, ground differential protection, and the use(More)
Source transfer for industrial facilities such as cement production plants has often been accomplished using discrete relays, such as overcurrent, overvoltage, undervoltage, differential and sync check, plus logic created out of auxiliary relays and timers, or programmable logic controllers (PLCs). The advent of advanced digital protection systems with(More)
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