Polyphase power management system for telecommunications equipment site power plant and method of operation thereof
A polyphase power management system (PMS) and a method of operating the same. In one embodiment, the PMS includes: (1) a switching unit having a polyphase mains input with a neutral, a backup power input, a rectifier output and an other loads output, (2) a mains monitor/controller coupled to the switching unit and configured to monitor the polyphase mains input and route various phases of the polyphase mains input or the backup power input to the rectifier output and the other loads output based on the number of phases that are nominal at the polyphase mains input.
1. A polyphase power management system, comprising:
a switching unit having a polyphase mains input with a neutral, a backup power input, a rectifier output and an other loads output;
a mains monitor/controller coupled to said switching unit and configured to monitor said polyphase mains input and route:
at least one nominal phase of said polyphase mains input to said rectifier output and another nominal phase of said polyphase mains input to said other loads output when at least three phases are nominal at said polyphase mains input,
one nominal phase of said polyphase mains input to said rectifier output and another nominal phase of said polyphase mains input to said other loads output when only two phases are nominal at said polyphase mains input,
one nominal phase of said polyphase mains input to both said rectifier output and said other loads output when only one phase is nominal at said polyphase mains input, and
said backup power input to both said rectifier output and said other loads output when no phases are nominal at said polyphase mains input.
2. The polyphase power management system as recited in claim 1 further comprising at least one rectifier coupled to said rectifier output, said mains monitor/controller further configured to route at least two nominal phases and said neutral of said polyphase mains input to said rectifier output when at least three phases are nominal at said polyphase mains input, said at least one rectifier configured to rectify power from a subset of said at least two nominal phases and said neutral based on voltages of said at least two nominal phases.
3. The polyphase power management system as recited in claim 2 wherein said at least one rectifier is a plurality of rectifiers coupled in parallel.
4. The polyphase power management system as recited in claim 2 further comprising a DC bus coupling an output of said at least one rectifier to telecommunications equipment and at least one battery.
5. The polyphase power management system as recited in claim 1 further comprising a generator coupled to said backup power input and said mains monitor/controller.
6. The polyphase power management system as recited in claim 5 wherein said mains monitor/controller is further configured to place said generator on standby when said only one phase is nominal at said polyphase mains input.
7. The polyphase power management system as recited in claim 1 further comprising a voltage converter coupled to said other loads output and said mains monitor/controller.
8. A method of operating a polyphase power management system including a switching unit having a polyphase mains input with a neutral, a backup power input, a rectifier output and an other loads output, the method comprising:
routing at least one nominal phase of said polyphase mains input to said rectifier output and another nominal phase of said polyphase mains input to said other loads output when at least three phases are nominal at said polyphase mains input;
alternatively routing one phase of said polyphase mains input to said rectifier output and another nominal phase of said polyphase mains input to said other loads output when only two phases are nominal at said polyphase mains input;
alternatively routing one phase of said polyphase mains input to both said rectifier output and said other loads output when only one phase is nominal at said polyphase mains input; and
alternatively routing said backup power input to both said rectifier output and said other loads output when no phases are nominal at said polyphase mains input.
9. The method as recited in claim 8 wherein said routing comprises routing at least two nominal phases and said neutral of said polyphase mains input to said rectifier output when at least three phases are nominal at said polyphase mains input, said at least one rectifier configured to rectify power from a subset of said at least two nominal phases and said neutral based on voltages of said at least two nominal phases.
10. The method as recited in claim 9 wherein said at least one rectifier is a plurality of rectifiers coupled in parallel.
11. The method as recited in claim 9 further comprising providing power from said at least one rectifier to telecommunications equipment and at least one battery via a DC bus.
12. The method as recited in claim 8 further comprising controlling a generator coupled to said backup power input with a mains monitor/controller.
13. The method as recited in claim 12 further comprising placing said generator on standby when said only one phase is nominal at said polyphase mains input.
14. The method as recited in claim 8 further comprising controlling a voltage converter coupled to said other loads output via a mains monitor/controller.
15. A telecommunications equipment site, comprising:
telecommunications equipment;
at least one rectifier;
at least one battery;
a DC bus coupling said telecommunications equipment, said at least one rectifier and said at least one battery and configured to allow said at least one rectifier and said at least one battery to provide power to said telecommunications equipment;
other loads;
a generator; and
a polyphase power management system, including:
a switching unit having a polyphase mains input with a neutral, a backup power input coupled to said generator, a rectifier output coupled to said at least one rectifier and an other loads output coupled to said other loads;
a mains monitor/controller coupled to said switching unit and configured to monitor said polyphase mains input and route:
at least one nominal phase of said polyphase mains input to said rectifier output and another nominal phase of said polyphase mains input to said other loads output when at least three phases are nominal at said polyphase mains input,
one phase of said polyphase mains input to said rectifier output and another nominal phase of said polyphase mains input to said other loads output when only two phases are nominal at said polyphase mains input,
one phase of said polyphase mains input to both said rectifier output and said other loads output when only one phase is nominal at said polyphase mains input, and
said backup power input to both said rectifier output and said other loads output when no phases are nominal at said polyphase mains input.
16. The telecommunications equipment site as recited in claim 15 wherein said mains monitor/controller is further configured to route at least two nominal phases and said neutral of said polyphase mains input to said rectifier output when at least three phases are nominal at said polyphase mains input, said at least one rectifier configured to rectify power from a subset of said at least two nominal phases and said neutral based on voltages of said at least two nominal phases.
17. The telecommunications equipment site as recited in claim 15 wherein said at least one rectifier is a plurality of rectifiers coupled in parallel.
18. The telecommunications equipment site as recited in claim 15 wherein said mains monitor/controller is further configured to place said generator on standby when said only one phase is nominal at said polyphase mains input.
19. The telecommunications equipment site as recited in claim 15 further comprising a voltage converter coupled between said other loads output and said other loads.
20. The telecommunications equipment site as recited in claim 19 wherein said mains monitor/controller is further configured to control said voltage converter.