| Popis: |
A transmission element, including a transmission line or an autotransformer, reclosure will cause electrical power transients on the Bulk Electric System. These switching transients can cause a sudden change in electrical power output on nearby generators. The magnitude of the sudden change in power is directly related to the phase angle difference across the breaker poles when opened. The larger the angle difference across the breaker the larger the sudden change in power on the generator. If these sudden changes in power are of a large enough magnitude, permanent damage can be caused to the shaft of the generator. The purpose of this paper is to present a methodology for computing near real-time sudden power changes. This will aid decision makers in identifying potential closing angle issues and giving transmission operators the opportunity to expeditiously mitigate the problem before the transmission element is switched back into service. Furthermore, the methodology is demonstrated via planning and operational examples. Additionally, a Python program that can automatically identify closing angle issues on the Bulk Electric System in near real-time is provided. |
