Reliability evaluation and comparison for next-generation substation function based on IEC 61850 using Monte Carlo simulation

Abstract

The traditional way to evaluate the system reliability or a probability of failure in the system is to use one of two basic approaches, direct analytical techniques or stochastic simulation. The emerging concept of Smart Grid requires advanced automation solutions for distributed electricity production and distribution. The automation system must fill the performance, availability and reliability requirements, including a probability of failure level under the specified limits. IEC61850 is a recent standard for electrical substation automation and it is also extended to the communication between substations. It provides interoperability in substation automation systems (SAS) consisting of devices by different vendors. This paper discusses about the evaluation of system reliability and the probability of failure existing in one protection intelligent electronic devices (IED), the evaluation of the general protection function and the breaker failure protection (BFP) function for practical small transmission substation T1-1. Different practical configurations are considered. A sequential Monte Carlo method is used to simulate the reliability and probability of failure. Comparison between analytical and simulation results is made by increasing the number of trails. Our result indicates how much the redundant ring architecture increases the reliability compared to the cascaded architecture. Applied Monte Carlo simulation method is also a flexible solution that has the ability to change, expand input data and include different parameters without a need to change the underlying software.

Responsiveness of Multi-Channel IEC-61850 Substation Communication Network Reliability Performance to Changes in Repair Factors

“…The papers [1], [2], [29] discuss the reliability, availability and data traffic flow performance of IEC-61850 based SCN. The reliability and availability performance is evaluated using the RBD while Optimised Network Engineering Tools (OPNET) software is used in [27], [30], [39]- [43], [31]- [38]. In the studies presented in [27], [30], [39]- [43], [31]- [38], system diagnostic coverage is not considered in the evaluation of the system reliability performance [2], [6].…”

Evaluation of control system reliability using combined dynamic fault trees and Markov models

“…(4) Gamma Distribution (5) and the gamma function (6) (5) (6) , where represents the number of partial failures per complete failure or events that generate failure. The simulation block outputs were selected as follows:…”

“…Monte Carlo simulation, RBD, Boolean truth table and field data estimation methods are applied to the 5 different UPS configurations. In [6], the analytical and simulation approaches of reliability evaluation for substations and for different substation topologies are investigated. The paper concludes that the Monte Carlo method is a flexible alternative of analytical methods.…”

Impact of Imperfect Repairs and Diagnostic Coverage on the Reliability of Multi-Channel IEC-61850 Substation Communication Network

“…A detailed review of reliability evaluation methods for IEC-61850 based SCN is presented in [6]- [9], which highlight this aspect. More reliability and availability comparison studies are presented in [10], [11]. As a result, the methods exaggerated system performance is obtained through their use; which sees the system appears to underperform during its useful life [1], [9], [12], [13].…”