Static Var Compensator Substation Design

Static Var Compensator Substation Design

Mitsubishi Electric Power Products Incorporated–Duke Energy Carolinas

Duke Energy Carolinas required a solution to resolve a portion of their territory that has been identified as having a high load pocket with little to no contingencies for serving the load. Duke Energy Carolinas needed to safely, efficiently, and reliably handle the system fluctuations in that territory. One generation source serves as the main source of power for this territory, and has historically experienced periodic unit losses. The Static Var Compensator (SVC) was chosen to handle the system fluctuations in the area, as opposed to an additional generation source which was deemed to be less feasible.

The new SVC yard will be constructed adjacent to an existing 100 kV substation (Rural Hall), and will be constructed with various high security features and devices. Electronic security considerations regarding the specific methods of communications and controls of the equipment and station facilities are also required.

In addition to the physical, structural, protection and controls, and settings substation engineering, Commonwealth will be performing a complete civil design for the site development as well as facilitating the permitting activities via a local environmental contractor. The permitting presented unique challenges as the tree clearing on the site had to be performed in a small time frame to avoid the pup season for the Northern Long-Eared Bat that could have potentially roosted in the trees on this site and delayed construction activities.

The Engineering, Procurement, and Construction (EPC) contract with MEPPI is for a +300 MVAR (capacitive) to -100 MVAR (inductive) Static VAR Compensator (SVC) at Duke Energy Carolinas’ Rural Hall 100 kV substation in Rural Hall, North Carolina.

This solution was implemented in the following market(s):

We utilize our expertise from multiple departments while continuing to build on our strong background of Flexible AC Transmission Systems.

Geoff Biela, P.E.
Engineer - Substation Civil Team Leader

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