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Asset Management Program



PowerStream, the third largest local electricity distribution company in Ontario, delivers power to more than 238,000 residential and business customers in the municipalities of Aurora, Markham, Richmond Hill, and Vaughan. PowerStream owns and operates distribution assets valued at approximately $617 million, including 4,294 km of underground cable and 17 municipal substations.


BIS is currently working with Kinectrics to develop an asset management program for PowerStream’s distribution system. PowerStream is in the process of imple-menting an asset management program for its transmission and distribution assets. The program includes the development of Health Indices, risk-based economic analyses (probability of failure and criticality), and recommended Asset Sustainability Plans (replacements).

A key part of the asset management program is Asset Condition Assessment (ACA), involving collection and interpretation of condition and performance data to enable informed investment decisions. The primary purpose of the ACA is to detect and quantify long-term degradation, which would necessitate major capital expenditure. The result of the ACA is an optimized life-cycle plan based on real asset sustainability.

The first phase of the project included development of decision-support tools for power station transformers. The second phase was to develop economic decision-support models for underground cables, circuit breakers, and municipal station transformers, based on methodologies used in the first phase.

The general ACA framework is a two-step process consisting of Asset Evaluations and Program Development. The first step, Asset Evaluations, translates condition and criticality information into repeatable, quantitative measures. The second step, Program Development, involves defining intervention modes to mitigate asset risk, performing risk-based economic analyses to minimize asset life-cycle cost, and providing justification and prioritization for long-range spending.

Additional, on-going analyses include decision support tools for poles/conductors/insulators, distribution switchgear, distribution transformers, 230 kV switches/substation HV switches and fuses, and station capacitors and reactors.


The risk-based economic analysis methodology justifies spending decisions by determining the economically optimal timing of asset expenditures based on the associated asset risk profiles and related capital costs for interventions.

The key result of this is that the need for spending on replacement or rehabilitation of existing assets is quantified and highlighted. PowerStream will be able to justify either prioritizing these projects higher relative to other spending need, or increasing their total capital spending to accommodate replacement.

Date Completed: Ongoing

Capital planning support based on condition and risk. Justification for replacement and rehabilitation programs during budget cycle.
Key Results
Quantification of benefits of equipment replacement. Ability to prioritize replacement against other spending needs. Consistent method of assessing condition and criticality of assets.
Joe Bonadie
(905) 532-4432
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