Direct transfer trip with distributed energy resources, and alternatives
October 30, 2024
Freedom
DER
11:00-11:45 AM EST
Radial distribution circuits in North America are generally designed to be energized only from one end. With this design, de-energizing the circuit when necessary is a fairly straightforward matter. However, when Distributed Energy Resources (DERs) are added, these distribution circuits are then energized from multiple points, and ensuring that the circuit is de-energized on command becomes more complicated. One technology sometimes employed to achieve this de-energization with DERs is Direct Transfer Trip (DTT). DTT is proven, mature, and fast-acting, but it is also presents a host of challenges, including that it is expensive and not well-suited for situations with many DERs. Low-cost, scalable, reliable, and fast means of ensuring distribution circuit de-energization in the presence of DERs are needed. This session includes a discussion of DTT, presently-available DTT alternatives with their pros and cons, and potential future means for achieving the needed de-energization function with high reliability, high speed, and low cost.
Radial distribution circuits in North America are generally designed to be energized only from one end. With this design, de-energizing the circuit when necessary is a fairly straightforward matter. However, when Distributed Energy Resources (DERs) are added, these distribution circuits are then energized from multiple points, and ensuring that the circuit is de-energized on command becomes more complicated. One technology sometimes employed to achieve this de-energization with DERs is Direct Transfer Trip (DTT). DTT is proven, mature, and fast-acting, but it is also presents a host of challenges, including that it is expensive and not well-suited for situations with many DERs. Low-cost, scalable, reliable, and fast means of ensuring distribution circuit de-energization in the presence of DERs are needed. This session includes a discussion of DTT, presently-available DTT alternatives with their pros and cons, and potential future means for achieving the needed de-energization function with high reliability, high speed, and low cost.
