This disclosure describes techniques for improving the operational efficiency of rack power systems. A standby state is configured for each power supply unit (PSU). In the standby states, the PSU does not supply current to the load but is operationally ready to immediately transition to a power sourcing mode as needed. Transition between modes can be controlled through logic built within the PSU or through logic included in a power shelf controller that monitors the power draw of each PSU. The power shelf controller can calculate and deploy the number of PSUs that are to be placed in standby state in order to enable the remaining PSUs that are in a power sourcing mode to operate close to their peak efficiency point. The techniques enable power supply units (PSU) in the rack power system to operate near the peak efficiency point, thereby optimizing the performance of the overall rack power system and reducing operational costs.

Creative Commons License

Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.