Substation Engineering

EES Consulting provides complete electrical and civil designs of substations, covering gas-insulated substations (GIS) as well as conventional air-insulated substations (AIS). Our experience covers all common switching arrangements (radial bus, main and transfer bus, double bus, ring bus and breaker-and-one-half) for voltages through 230kV.

We perform design of new substations as well as upgrades and equipment change-outs at existing stations. Services include controls and protection system design, site development and drainage design, foundation design, support structure design, bus and equipment layout design, as well as conduit and grounding system design. Our design is performed in close coordination with the project owner to ensure the owner’s requirements and interests are fully reflected in the final design.

EES provides complete design and bid documents and, if requested, construction support services to the owner, such as shop drawing reviews and witnessing factory and field tests through project commissioning. Our experience also covers development of bidding documents for alternative project delivery methods, such as EPC (“Engineer, Procure, Construct”)

Featured Projects

Los Angeles County Aliso Canyon

The County of Los Angeles asked EES Consulting to evaluate alternatives to mitigate the need to withdraw natural gas from the Aliso Canyon storage facility. The facility was used to supply gas during peak winter usage as well as to supply natural gas-fired generators during peak summer demand, but it was shut down after a massive leak released more than 100,000 metric tons of methane. EES found that measures put in place by utilities in Southern California to maintain system reliability without utilizing Aliso Canyon were working, and that resuming natural gas injections was unnecessary in the near term. In the longer term, the acquisition of demand response, energy storage, and energy efficiency could effectively displace the need for Aliso Canyon. EES also provided a series of recommendations to improve the implementation of the mitigation measures. (Image:Earthworks)

Grays Harbor PUD Integrated Resource Plan

EES Consulting prepared Grays Harbor’s 2020 Integrated Resource Plan. Grays Harbor is required to submit an IRP to the state of Washington every two years that demonstrates how it will meet the electric power needs of its members with a reliable supply of power delivered in the most cost-effective manner. The 2020 IRP was an evaluation of resource alternatives that could be deployed to meet Grays Harbor’s load and meet state of Washington renewable energy requirements under the Energy Independence Act and carbon-free energy requirements under the Clean Energy Transformation Act. Grays Harbor embarked on an IRP to study alternative sources of supply that could best serve its customers’ needs for the period 2021-2040.