Development of a framework to estimate the condition of mechanical, electrical and plumbing systems with Bayesian Networks

As the Western European building stock ages, attention is increasingly allocated to the maintenance of building components, particularly mechanical, electrical and plumbing (MEP) systems. Although the latter are essential in ensuring the correct operation of a building and the safety of its occupants, they remain the crafts where the most...

A theoretical approach towards digital twins: A balance between an empirical and a fundamental model for distribution transformers

The energy transition will significantly impact distribution transformers as they will have to deal with more load on them, which is also more variable due to renewable energy sources. However, currently, these transformers are often not monitored with sensors. Therefore, the Dutch network operator Stedin asked to investigate the possibilities...

Transformer Condition Assessment & Survival Model

Managing electrical distribution assets entails making the decision on how to proceed with an ageing asset. The three options that asset managers have are run to fail, perform maintenance or repairs and lastly to replace. This decision making process is becoming incrementally more important due to the threat of replacement waves. This a...

(RE)DEVELOP THE FUTURE: An instrument to develop and implement the concept of circularity for the redevelopment initiation phase

Context - The current environmental situation as a result of human life reflects the demand for more consciousness on the embedded energy of buildings. Moreover, due to the recent economic crisis the perceived naturalness to demolish existing buildings for new development is outdated. Hence, new functions should be accommodated in existing...

The use of new data sources in bridge maintenance decision-making: On the effect of using new data sources during decision making moments of bridge maintenance experts through a serious game based experiment

The current practice of bridge maintenance decision-making is informed by subjective visual inspection data with a long time interval between measurements, which creates inefficiencies and possible loss of value in the maintenance entity’s capabilities. New opportunities from technology-related innovations for measurement devices are available...

Influence of test parameters on the on-load tap changer's dynamic resistance measurement

This thesis is aimed to analyze the effect of test parameters on DRM results from OLTC and its implementation in the condition assessment. Two test parameters were selected to be observed, which are test current and circuit resistance. Their amplitude was varied during the measurements and experiments in the laboratory as well as in the field ...

Dielectric Loss Estimation using Damped AC Voltages

Insulation failures in HV components may be caused by lower dielectric strength due to aging processes and by internal defects in the insulation system. It is known, that unlike voltage testing, measurements of the dielectric loss may give an absolute indicator for the quality level of the cable insulation. For several years the application of...

Dielectric Relaxation Analysis to Assess the Integrity of High Voltage DC Cables of the Mass Impregnated Type

This thesis is an in-depth research on information concerning High Voltage Direct Current (HVDC) power transmission. The far reaching effects from faults arising in HVDC cable systems are noteworthy and from this perspective a broad literature review is dedicated to insulation monitoring techniques. The analysis is further subcategorised into on...