Electrical Asset Condition-Based Reliability Management System
BoK Content Source:
Sunday, March 5, 2017
For some time a necessary change has been evolving in how we look at maintenance of electrical power systems and equipment. This is being driven by many influences including cost, technology and an ever evolving human resource base to name but a few. Efforts are being directed to explore new approaches and techniques regarding the monitoring, diagnosis, life assessment and condition evaluation of critical facility infrastructure. Power interruptions and failures are one of the major symptoms of ageing electrical distribution components. Facility managers are understandably out to maximize the use and performance of the electrical distribution network assets, while ensuring that quality and reliability are not compromised. Organizations are migrating from traditional time based maintenance to a condition based reliability maintenance (CBRM) program for their electrical assets. CBRM or more simply CBM periodically and more commonly continuously determines the state of equipment deterioration and maintains equipment when the condition falls below acceptable risk thresholds. The process of transition from a reactive maintenance organization to a totally proactive structure is not an overnight project. It will take time, effort and planning to accomplish. The transition requires commitment from all levels of the organization. The key to this approach is to have a reliable means to evaluate the condition of equipment and the system as a whole. To do this all information regarding the equipment is stored and weighted as to its value in determining condition. This includes all “cradle to grave” information starting with manufacturers’ tests and specifications, site acceptance tests and routine maintenance testing. Now more and more on line diagnostics are being used to input real (or close to) real time input to the formula. In addition the more accomplished and superior algorithms will include a component of risk weighting, in other words how critical is the equipment to the ultimate process. Although the ultimate aim is to develop and implement condition and risk-based asset management strategies and capabilities, it is prerequisite or necessity for organizations to fully understand its capability gap and realign its asset management functions by addressing all the necessary building blocks or pillars of asset management. The comprehensive approaches must effectively deal with leadership mindset, integrated asset information system, condition assessment technologies, organizational structure and human competencies and remain consistent with industry standard asset management practices as per ISO PAS 55-1 now ISO 55000. In conclusion, this paper will provide an update on these evolving practices and some early adopters experience with the new methodology. A sample working system utilizing a transformer will be described with the pros and cons of operating such a system rationalized. Real life data will be utilized to explain the principals of operation and if possible real time streaming data from an operational installation will be utilized.