سیستم های حفاظت از خطوط انتقال با کمک کانال های مخابراتی- بخش 2: تحلیل عملکردی مقایسه ای

• The methodology presented in the Part I paper for the performance analysis of transmission line protection systems, based on a probabilistic approach to system successful operation, is applied to four different protection schemes with aided communication channels operating in today's transmission networks.• The system performance takes into account equipment reliability factors: failure rate and time to repair.• New probabilistic performance indicators for transmission line protection are introduced, which are useful for protection system design.• The performance indicators allow quantifying the benefits of the different design options, such as redundancy or equipment sharing.• The new indicators can be used in a cost/benefit analysis, as well as to assess maintenance strategies and equipment reliability requirements.Following the Part I paper, a comparative performance analysis is presented, considering four different transmission line protection schemes, equipped with aided communication channels. In the Part I paper, the performance analysis methodology was presented, which is based on a probabilistic approach to protection system successful operation. The system performance takes in account equipment reliability factors such as failure rate and time to repair, and is assessed by the availability index. In the present paper, new performance indicators are introduced, which are applicable to transmission line protection system design, as well as to describe its probabilistic operation in other power system studies.Four different transmission line protection schemes with aided communication channels, operating in today's transmission networks, are compared. The results obtained for the performance indicators allow quantifying the benefits of the different design options. In particular, the effect of relay and communication channel redundancy, as well as communication channel sharing, is highlighted.Furthermore, results show that the newly defined performance indicators can be used in a cost/benefit analysis, as well as to assess maintenance strategies and communication reliability requirements.