Solution
We brought a program management approach to the challenge, looking for efficiencies that would allow more to be accomplished in less time. A combination of circuit modeling, studies and iterative design helped us meet the utility’s objectives.
Beginning with the utility’s existing GIS data, we used ASPEN OneLiner software to build a model of each distribution feeder for which a new recloser was proposed. We also completed more than 750 fault current studies to evaluate installation locations and equipment ratings. The output helped with siting and sizing across the program territory.
Depending on the device type, we also ran secondary protection coordination studies. Fault current information and existing protection devices were evaluated within OneLiner and used to design a protection coordination scheme for the affected feeders.
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Solution
We brought a program management approach to the challenge, looking for efficiencies that would allow more to be accomplished in less time. A combination of circuit modeling, studies and iterative design helped us meet the utility’s objectives.
Beginning with the utility’s existing GIS data, we used ASPEN OneLiner software to build a model of each distribution feeder for which a new recloser was proposed. We also completed more than 750 fault current studies to evaluate installation locations and equipment ratings. The output helped with siting and sizing across the program territory.
Depending on the device type, we also ran secondary protection coordination studies. Fault current information and existing protection devices were evaluated within OneLiner and used to design a protection coordination scheme for the affected feeders.
Each proposed location was visited to assess installation feasibility, which involved field inspections of more than 1,000 distribution poles. The collected data and site photography were stored in a web-hosted GIS map, which later supported the development of pole inspection forms in the required formats.
We prepared and submitted permit applications to the relevant jurisdictions; our work included development of drawings and engineered traffic control plans as needed. Efficiencies were achieved through the combined submission of multiple sites simultaneously to save on permitting costs where allowable.
The preparations culminated in preparing distribution designs for each recloser location. Work package preparation included making updates and completing work requests in Pepco’s GWD and WMIS design programs. We were able to gain access, onboard and become effective in using those programs while maintaining the project schedule.
Results
We provided coordination within a wide capacity of system planning, system protection, SCADA, telecom, EMS, OMS, distribution engineering, construction standards and overhead construction. Backed by detailed capture of notes and information, our team achieved smooth integration into Pepco’s workflows and processes, enabling the large volume of work to be completed on a compressed schedule.
Through a program management approach, we gained economies of scale by mobilizing one team for numerous projects. Geospatial tools helped us coordinate among a large and diverse group of stakeholders. A bundled approach was critical to meeting the execution schedule.
In just under a year, we completed our scope to Pepco’s satisfaction, on schedule, supporting the installation of more than 650 reclosers and helping keep the utility’s reliability improvement measures on track.
