Vermont Electric Power Company proposes to upgrade the Barre Substation. The upgrade is needed because a recent conditions assessment revealed deficiencies within the substation. The transmission system upgrade will improve reliability of electric facilities serving portions of central Vermont.
Needs & Benefits
The original VELCO Barre Substation was built in 1958, with various modifications and improvements occurring over the nearly 60 years of service. VELCO conducted a condition assessment of the substation and identified the need to replace some of the equipment due to condition. Deficiencies were identified in equipment such as the protection and controls, breakers, switches, foundations and structural steel.
VELCO proposes to address the majority of the concerns by upgrading the protection and control system and constructing a larger control building. Other elements will be addressed by in-kind replacement and modifications of the existing equipment. The Project will require expanding the substation fence by approximately 30 feet on the south side and making various expansions of approximately 15 feet or less on the east, west and north sides.
The proposed improvements to the substation will require the installation of a temporary substation, on land owned by VELCO on the opposite side of Upper Prospect Street.
The project consists of the following components:
- Replace the protection and control system with a system that provides diversity, redundancy and communication aided schemes;
- Install systems to utilize the load tap changer on the 115/34.5 transformer;
- Replace the 115 kV oil circuit breakers and 115 kV circuit switcher with 115kV SF6 breakers;
- Replace a 34.5 kV oil circuit breaker and 34.5 kV capacitor switches with 34.5 vacuum breakers;
- Replace several 34.5 kV disconnect switches and 34.5 kV instrument voltage transformers;
- Replace the existing control building with a new control building that is able to accommodate the new protection and control system, redundant AC & DC station services, communication equipment and security systems. The new control building will be located on the north side of the substation which will better facilitate the construction activities and future access;
- Install a new steel box structure to support 34.5 kV equipment, such as: breaker, switches, station service transformers and instrument voltage transformers;
- Perform various fence expansions as a result of changes to the arrangement of the substation equipment, to improve access for maintenance and for storage of materials.
VELCO’s aesthetic consultant (T.J. Boyle Associates) review the preliminary design plans and performed a visual analysis of the areas of the proposed Project. The findings indicate the Project will not create any adverse aesthetic impacts. A full analysis of potential aesthetic impacts and proposed landscaping to mitigate those impacts will be included with the Petition filed with the Public Utility Commission. VELCO does not anticipate adverse aesthetic impacts from the Project.
VELCO’s noise consultant, Resource Systems Group, Inc. (RSG) assessed the potential noise impacts associated with the Project. A complete engineering noise analysis will be provided as part of the Project’s filing with the Public Utility Commission. Preliminary findings from RSG indicate no adverse impacts are expected at the residences closest to the substation.
- Fall 2017
- Public meetings
- Summer 2018
- Regulatory and permitting process
- Fall 2018
- Construction start
- Fall 2019
- Anticipated completion