Comparative Analysis of Busbar Protection Architectures

Abstract

The performance of three commonly used busbar protection architectures (centralized, decentralized and redundant) is compared, taking into account the reliability indices (failure rate and Mean Time to Repair) of their components. The protection system performance is analyzed, considering that the probability of successful fault clearance is given by the system availability. The different architectures were applied to a double busbar with bus coupler substation. The busbar protection architectures are described by reliability graphs, and the availabilities are computed by Monte Carlo simulation. Key performance indicators are introduced and the influence of the substation size on the protection system performance is analyzed. A comparative study is carried out, allowing to quantify the benefits of the different design options.Index Terms -Availability, power system protection, redundancy, reliability. I.0885-8977 (c)

Sampled value‐based bus zone protection scheme with dq ‐components

“…Hence, the selection of excellent mathematical analysis tools and algorithms has the utmost significance [2, 3]. Security of the protection unit can be improved by appropriate substation design and dividing the bus zone into multiple zones [4]. An internal bus fault, in this case, will disturb only a smaller part of the substation and fewer components will be affected.…”

Initial travelling wavefront‐based bus zone protection scheme

“…The occurrence of a fault on busbar may cause disconnection of all incoming and outgoing lines connected to the busbar. In large substations, busbar protection zone is usually divided into multiple zones [1,2]. Therefore, implementing busbar protection has been one of the difficult aspects of power system protection.…”

Intelligent busbar protection scheme based on combination of support vector machine and S‐transform

“…Although busbar faults rarely occur in power systems, fault currents with high magnitude may appear due to the concentration of the short circuit sources. So, fast and accurate busbar protection scheme is an essential need to curb the damaging effects on equipment and system stability [1–3]. The protection scheme should trip only for internal faults and restrain for external faults out of busbar protection zone.…”