Utility: Transformer Busbar
Large or small, EMS has the busbar for your power transformer.
Busbar systems in the utilities sector include power generation, transmission and distribution.
Critical markets that use high power busbar within the power generation sector include:
Critical markets that use bus bar in power transmission and distribution applications include:
Busbar failure can present serious problems in the power system. A busbar failure can result in outages of the connected transmission lines. When this happens, the power flow shifts to the remaining functioning lines that now carry more power than they’re capable of. This can lead to tripping of the lines, which can result in a complete blackout or similar failure situations.
For this reason, it’s critical to understand which type of busbar systems should be used for your application.
With the proper busbar system, safe and reliable operation of transmission systems is attained.
Busbar systems can include a single bus bar or multiple bus bars. Depending on the application requirements, a single busbar may be all you need. However, if you underestimate or miscalculate application requirements, you could end up causing a complete blackout.
Below, we provide the advantages, disadvantages and application requirements for the most common power transformer busbar systems.
Single busbar arrangements offer a simple & low cost solution for power control and protection. However, there are some significant disadvantages to single busbar arrangements, including an absence of redundancy, as well as limited flexibility for operation maintenance and management.
Most importantly, if a single busbar arrangement fails the entire substation can be rendered out of service. To improve reliability, a second busbar should be added.
The double busbar arrangement offers far greater flexibility & reliability during substation operation. It’s possible to control power flow by using the busbars independently & switching a feeder from one busbar to the other.
However, since busbar disconnectors cannot break the feeder’s rated current there will still be a power flow disruption, although it will be a much shorter disruption that one caused by a single bus bar arrangement.
The One-Breaker-and-Half-Scheme is a compromise between the double busbar arrangement and a double circuit breaker scheme. With the One-Breaker-and-Half Scheme there can be a loss of a complete busbar without any disruption of the feeders power supply.
Designs with One-Breaker-and-Half Scheme, paired with Double Circuit Breaker Arrangements ensure high redundancy, but result in higher costs.
For higher voltage levels at the nodes of transmission systems on important substations, a 3 phase busbar arrangement should be used.
EMS is an industry leading busbar manufacturer for power transformers. We fabricate busbar sizes for all power transformers, both large and small.