Transient excitation boosting at Grand Coulee Third Power plant: power system application and field tests

Abstract

Transient excitation boosting (TEB) has been installed on the Grand Coulee Third Power Plant hydrogenerators (three 600 MVA units and three 700 MVA units). TEB is initiated for outages of the 3100 MW Pacific HVDC Intertie, and results in a decaying pulse input to the gemrator voltage regulators. TEB temporarily raises Pacific Northwest transmission voltages which increases voltage-sensitive loads. The increased load brakes Northwest generators which are accelerating because of the loss of HVDC Intertie power. Transient stability of the parallel Pacific AC Intertie is thus improved. Power system-wide commissioning tests were conducted on May 7, 1991. We describe the tests and compare test results with simulation results.

Excitation System Technologies for Wound-Field Synchronous Machines: Survey of Solutions and Evolving Trends

“…This is another example of a tailor-made solution to overcome some limitations of the potential source excitation aiming to improve the transient stability of the power grid [51]. Note that the topology A4 is different from the 'transient excitation boosting' system proposed in the early 1990s [74], which consisted of very powerful static exciters.…”

Wide‐area measurement system‐based transient excitation boosting control to improve power system transient stability

“…The application of the excitation boosting to one generator raises the terminal voltage of this generator and consequently also increases the electrical power of this generator [7][8][9][10][11][12]. Thus, according to (2) and (4), the following points can be obtained:…”

“…The application of the excitation boosting to one generator raises the terminal voltage of this generator and consequently also increases the electrical power of this generator [7–12]. Thus, according to (2) and (4), the following points can be obtained: (a) If the excitation boosting is applied to the CMs and is not applied to the NMs, then only the terminal voltage and the electrical power of the CMs are significantly raised, that is, P e i ( i ∈ CM) is increased and P e i ( i ∈ NM) is little affected.…”

“…It improves the control logics of the TSEC to further explore its stability benefits. After that, the WECC proposes a station communication‐based TEBC and names it as the transient excitation boosting (TEB) [10–12]. Unlike the TSEC and the DEC, the TEB is used to improve the transient stability after the dc‐link outage faults.…”

Modeling, Sizing, and Control of an Excitation Booster for Enhancement of Synchronous Generators Fault Ride-Through Capability: Experimental Validation

“…The second group adds a signal to the reference voltage of the excitation system. This signal either depends on the rotor speed deviation that is locally measured [5], on a decaying pulse triggered by a remote signal [12] or on a decision algorithm based in a Wide Area Measurement System (WAMS) and a fast simulator [13].…”