Toward an Integrated Approach of HV and MV Circuit-Breakers Optimization Maintenance Planning and Reliability Assessment: A Case Study

Abstract

This paper investigates technical and organizational tools to improve maintenance planning performances. Indeed, maintaining a high level of reliability and availability of a Medium Voltage electrical network protection system such as the Medium Voltage and High Voltage circuit-breaker and its numerical protection relay at a low operating expenses cost is one of the most critical and challenging tasks for MV electrical distribution network operators. This work has mainly two goals. Firstly, to propose an operating expenses budget function that evaluates the Planned Scheduled Preventive Maintenance Policy combined with a Condition-based maintenance fora real series-parallel multi-assets MV electrical distribution system with active redundancy under the reliability and the maintenance frequency visits of these components. Secondly, to implement an integrated genetic algorithm approach in order to look for the optimal perfect and planned preventive maintenance scheduling policy and condition-based maintenance that minimizes the maximum operating expenses cost of the entire system.The method determines the optimal schedule of preventive maintenance actions based on minimization both reliabilty and operating expenses costs. Conclusions and recommendations for practice are made on the basis of obtained results.

Smart Grid Challenges in Morocco and an Energy Demand Forecasting with Time Series

“…This mainly concerns the distribution grid operator, as it is responsible for maintaining a reasonable level of reliability, quality, and security. The grid operator has an increasing need for observability via the tools of the power network [27,28].…”

“…The available RE capacity is the highest capacity of wind, hydro, biomass and solar energies which can be introduced to the network with no transit constraints on the lines and the power grid generally [28]. The production of energy in Morocco combines RE and thermal generation.…”

A Failure Analysis Method Based on the Combination of FTA and GGRA: A Case Study on an Engine

“…Understanding the causes of system failure and finding the best way to reduce the failure are important for complex product operation and maintenance. Previous studies about failure rate and reliability assessment have been conducted, of which, established an improved delay time framework to model the two-stage failure process for medical equipment [1]; Guini et al (2018) proposed a hybrid approach of multi-criterion decision support for a product's process planning during the design phase; by investigations of technical and organizational tools to improve maintenance planning performances [2]; Mahmoudi et al (2017) put forward an integrated approach of HV and MV circuit-breakers optimization maintenance planning and reliability assessment [3]; Shao et al (2010) proposed a reliability information predicted modeling of electronic products based on reliability theory on physics of failure [4]; Sun et al (2015) proposed a failure analysis approach for multilayered composite risers used in the offshore oil industry based on a layer-by-layer progressive damage model and a homogenization stress analysis method [5]; proposed a multi-expert multi-criteria decision making model to classify medical devices according to their criticality used to set up guidelines for appropriate maintenance strategies [6]; Mouradi et al (2016) tried to interpret the non-rotating rope's residual strength quantitatively by using an analytical model to track and estimate the rope's reliability in terms of its strands' cumulative damage [7]. However, the system failure causes and the relations among system fault features for complex product in above studies was not fully developed.…”