Power management system

1. A power management system, comprising:

a first power grid coupled to a first circuit breaker;

a first power distribution unit coupled to the first circuit breaker; and

a server device including:

at least one server component;

at least one first power supply unit coupled to the first power distribution unit; and

a power management subsystem coupled to the at least one server component and the at least one first power supply unit, wherein the power management subsystem is configured to:

monitor a first input current draw of each first power supply unit;

determine whether the first input current draw exceeds a first input current limit that is based on the first circuit breaker;

throttle, in response the first input current draw exceeding the first input current limit, the at least one server component to reduce the first input current draw below the first input current limit; and

adjust the first input current limit to reduce a current draw difference between the first input current limit and a throttled current draw that results when the at least one server component is throttled, wherein the reduction of the current draw difference is based on a policy to reduce stranded power on the at least one power supply unit.

2. The system of claim 1 , further comprising:

a second power grid coupled to a second circuit breaker; and

a second power distribution unit coupled to the second circuit breaker, wherein the server device includes:

at least one second power supply unit coupled to the second power distribution unit, wherein the power management subsystem is coupled to the at least one second power supply unit and is configured to:

monitor a second input current draw of each second power supply unit;

determine whether the first input current draw and the second input current draw exceed the first input current limit that is based on the first circuit breaker and the second circuit breaker; and

throttle, in response the first input current draw and the second input current draw exceeding the first input current limit, the at least one server component to reduce the first input current draw and the second input current draw below the first input current limit.

3. The system of claim 1 , further comprising:

a second power grid coupled to a second circuit breaker; and

a second power distribution unit coupled to the second circuit breaker, wherein the server device includes:

at least one second power supply unit coupled to the second power distribution unit, wherein the power management subsystem is coupled to the at least one second power supply unit and is configured to:

monitor a second input current draw of each second power supply unit;

determine whether the second input current draw exceeds a second input current limit that is based on the second circuit breaker; and

throttle, in response the second input current draw exceeding the second input current limit, the at least one server component to reduce the second input current draw below the second input current limit.

4. The system of claim 1 , wherein the server device includes:

a communication system that is coupled to a network and the power management subsystem, wherein the power management subsystem is configured to:

receive, through the network via the communication system from an administrator device, the first input current limit.

5. The system of claim 1 , wherein the power management subsystem is configured to:

retrieve a server device power budget for the server device; and

automatically determine, using the server device power budget, the first input current limit.

6. An Information Handling System (IHS), comprising:

a processing system; and

a memory system that is coupled to the processing system and that includes instructions that, when executed by the processing system, cause the processing system to provide a power management subsystem that is configured to:

monitor a first input current draw of at least one first power supply unit that is coupled to a first power grid via a first circuit breaker;

determine whether the first input current draw exceeds a first input current limit that is based on the first circuit breaker;

throttle, in response the first input current draw exceeding the first input current limit, at least one system component to reduce the first input current draw below the first input current limit; and

adjust the first input current limit to reduce a current draw difference between the first input current limit and a throttled current draw that results when the at least one system component is throttled, wherein the reduction of the current draw difference is based on a policy to reduce stranded power on the at least one power supply unit.

7. The IHS of claim 6 , wherein the power management subsystem is configured to:

monitor a second input current draw of at least one second power supply unit that is coupled to a second power grid via a second circuit breaker;

determine whether the first input current draw and the second input current draw exceed the first input current limit that is based on the first circuit breaker and the second circuit breaker; and

throttle, in response the first input current draw and the second input current draw exceeding the first input current limit, the at least one system component to reduce the first input current draw and the second input current draw below the first input current limit.

8. The IHS of claim 6 , wherein the power management subsystem is configured to:

monitor a second input current draw of at least one second power supply unit that is coupled to a second power grid via a second circuit breaker;

determine whether the second input current draw exceed a second input current limit that is based on the second circuit breaker; and

throttle, in response the second input current draw exceeding the second input current limit, the at least one system component to reduce the second input current draw below the second input current limit.

9. The IHS of claim 8 , wherein the second input current limit is different than the first input current limit.

10. The IHS of claim 6 , wherein the power management subsystem is configured to:

receive, through a network from an administrator device, the first input current limit.

11. The IHS of claim 6 , wherein the power management subsystem is configured to:

retrieve a system power budget; and

automatically determine, using the system power budget, the first input current limit.

12. A method for power management, comprising:

monitoring, by a power management subsystem in a server device, a first input current draw of at least one first power supply unit in the server device that is coupled to a first power grid via a first circuit breaker;

determining, by the power management subsystem, whether the first input current draw exceeds a first input current limit that is based on the first circuit breaker; and

throttling, by the power management subsystem in response the first input current draw exceeding the first input current limit, at least one server component in the server device to reduce the first input current draw below the first input current limit; and

adjusting, by the power management subsystem, the first input current limit to reduce a current draw difference between the first input current limit and a throttled current draw that results when the at least one server component is throttled, wherein the reduction of the current draw difference is based on a policy to reduce stranded power on the at least one power supply unit.

13. The method of claim 12 , further comprising:

monitoring, by the power management subsystem, a second input current draw of at least one second power supply unit that is coupled to a second power grid via a second circuit breaker;

determining, by the power management subsystem, whether the first input current draw and the second input current draw exceed the first input current limit that is based on the first circuit breaker and the second circuit breaker; and

throttling, by the power management subsystem in response the first input current draw and the second input current draw exceeding the first input current limit, the at least one server component to reduce the first input current draw and the second input current draw below the first input current limit.

14. The method of claim 12 , further comprising:

monitoring, by the power management subsystem, a second input current draw of at least one second power supply unit that is coupled to a second power grid via a second circuit breaker;

determining, by the power management subsystem, whether the second input current draw exceed a second input current limit that is based on the second circuit breaker; and

throttling, by the power management subsystem in response the second input current draw exceeding the second input current limit, the at least one server component to reduce the second input current draw below the second input current limit.

15. The method of claim 14 , wherein the second input current limit is different than the first input current limit.

16. The method of claim 12 , further comprising:

receiving, by the power management subsystem through a network from an administrator device, the first input current limit.

17. The method of claim 12 , further comprising:

retrieving, by the power management subsystem, a server device power budget for the server device; and

automatically determining, by the power management subsystem using the server device power budget, the first input current limit.