ZA200806855B - Base station power management system and method - Google Patents
Base station power management system and method Download PDFInfo
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- ZA200806855B ZA200806855B ZA200806855A ZA200806855A ZA200806855B ZA 200806855 B ZA200806855 B ZA 200806855B ZA 200806855 A ZA200806855 A ZA 200806855A ZA 200806855 A ZA200806855 A ZA 200806855A ZA 200806855 B ZA200806855 B ZA 200806855B
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- providers
- phase current
- base station
- power
- provider
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- 238000000034 method Methods 0.000 title claims description 10
- 238000007726 management method Methods 0.000 claims description 22
- 238000004891 communication Methods 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 2
- 230000001413 cellular effect Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000036039 immunity Effects 0.000 description 1
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Description
BASE STATION POWER MANAGEMENT SYSTEM AND METHOD
This invention relates to a base station power management system and method.
It has become common practice for providers, for example, cellular telephony services providers, to share base stations. As a result of this sharing, site power management has become necessary, especially for sites whose infrastructure has not been upgraded by the relevant electricity suppliers to cater for the increasing demand for electrical power.
It is therefore an aim of the present invention to provide a power management system and method that can automatically adapt to, manage and control the power needs of a plurality of providers in real time.
According to a first aspect of the invention there is provided a base station power management system, the base station comprising a power supply input and a plurality of power supply outputs for a plurality of providers, respectively, the system comprising
. . . iN a processor that can access a predefined maximum limit of phase current that the plurality of providers, in combination, can draw; a plurality of sensors to determine the current that each phase of each provider is drawing in real time, the plurality of sensors being in communication with the processor so that this information is available to the processor; and a switching means that can be controlled by the processor, the switching means being associated with each of the plurality of providers so that if the total phase current being drawn by the plurality of providers exceeds the predefined maximum limit of phase current, the switching means can cut power to at least one of the plurality of providers in order to reduce the total phase current
In an example embodiment, the switching means can rotate which provider is to have its : power cut, so that when the total phase current being drawn by the plurality of providers exceeds the predefined maximum limit of phase current, at least one provider will have its power cut and at least one provider will still have power supply.
In an example embodiment, the switching means comprises latching relays.
In an example embodiment, the power supply input comprises a mains power supply and power produced by an electrical generator.
In an example embodiment, the system comprises sensors to monitor the mains power supply so that when there is an interruption in the mains power supply, the system is able to automatically switch over to generator power.
According to a second aspect of the invention there is provided a base station power management method, the base station comprising a power supply input and a plurality of power supply outputs for a plurality of providers, respectively, the method comprising: determining the current that each phase of each provider is drawing in real time; and cutting power to at least one of the plurality of providers, if the total phase current being drawn by the plurality of providers exceeds the predefined maximum limit of phase current, in order to reduce the total phase current.
In an example embodiment, the method comprises rotating which provider is to have its power cut, so that when the total phase current being drawn by the plurality of providers exceeds the predefined maximum limit of phase current, at least one provider will have its power cut and at least one provider will still have power supply.
In an example embodiment, the method comprises: monitoring the mains power supply, and automatically switching over to generator power when there is an interruption in the mains power supply. :
According to a third aspect of the invention there is provided a base station power management system, the base station comprising a power supply input and a plurality of power supply outputs for a plurality of providers, respectively, the system comprising’ memory to store a predefined maximum limit of phase current that the plurality of providers, in combination, can draw; and a processor to: determine the current that each phase of each provider is drawing in real time; and cut power to at least one of the plurality of providers if the total phase current being drawn by the plurality of providers exceeds the predefined maximum limit of phase current, in order to reduce the total phase current.
. ‘ .
In an example embodiment, the processor may be arranged to rotate which provider is to have its power cut, so that when the total phase current being drawn by the plurality of providers exceeds the predefined maximum limit of phase current, at least one provider : will have its power cut and at least one provider will still have power supply.
Figure 1 shows a schematic block diagram of a base station power management system according to an example embodiment; and
Figure 2 shows the operation of the base station power management system when power supply demand exceeds power supply capacity
Referring first to Figure 1, a base station power management system 10 is shown, the base station comprising a power supply input, indicated by arrow 12, and a plurality of : power supply outputs, indicated by arrows 14, 16 and 18, for a plurality of providers, respectively.
In an example embodiment, the power supply input 12 comprises a mains power supply 12 and power produced by an electrical generator 36. A generator start output with programmable warm-up delays may be included. The system 10 allows for generator ratings to be derated in accordance with operating altitude.
The system 10 comprises a processor 20 that can access a predefined maximum limit of phase current that the plurality of providers, in combination, can draw. The maximum limit may be determined according to individual site capacity characteristics, including mains supply amperage and generator kVA rating In an example embodiment, all operating parameters may be adjustable from a display and menu system 22. A security
- code arrangement may be implemented to prevent access to settings by unauthorised personnel.
The system 10 may further comprise a plurality of sensors, 24A, 24B and 24C for the 3 phases being supplied to Provider 1, sensors 26A, 26B and 26C for the 3 phases being supplied to Provider 2, and sensors 28A, 28B and 28C for the 3 phases being supplied to Provider 3. The sensors may be used to determine the current that each phase of each provider is drawing, with the plurality of sensors being in communication with the processor 20 so that this information is made available to the processor 20.
Switching means, in the form of latching relays 30, 32 and 34, each associated with each of the plurality of providers, may be used to cut power (provided by either the mains power supply 12 or the electrical generator 36) to at least one of the plurality of providers in order to reduce the total phase current when the total phase current being drawn by the plurality of providers exceeds the predefined maximum limit of phase current. Latching relays are relatively cheaper and use less power than traditional relay contactors.
In an example embodiment, the switching means 30, 32 and 34, under the control of the processor 20, can rotate which provider is to have its power cut, so that when the total phase current being drawn by the plurality of providers exceeds the predefined maximum limit of phase current, at least one provider will have its power cut and at least one provider will still have power supply. This feature will be described in more detail with reference to Figure 2.
In an example embodiment, the system 10 comprises sensors to monitor the mains power supply 12 so that when there is an interruption in the mains power supply 12, the system 10 is able to automatically switch over to generator power using switch 38.
Switch 40 is associated with the mains power supply 12.
The system 10 further includes full metering for the plurality of providers, as indicated by block 42. On a real time display, current, voltage, wattage and energy consumption can be monitored on all provider phases.
Turning now to Figure 2, the operation of the system 10 shown in Figure 1 will be described in more detail. Figure 2 shows the phase current being provided to Provider 1 and Provider 2, the total of these two phase currents, as well as the total current supply capacity of the site (indicated by broken line 44, and which corresponds to the predefined maximum limit of phase current described above)
After a predetermined period of time, the total phase current exceeds the supply capacity 44, and thus the supply of current to one of the providers (in this case, Provider 1) is terminated. As expected, the total phase current gets reduced to below the supply capacity 44 and after a predetermined period of time, typically between 5 and 10 minutes, current to Provider 1 is re-enabled.
It can be seen from the graph in Figure 2 that current to Provider 1 is not immediately acted upon when the supply is exceeded. This is to ensure that it is a genuine overload, and not a spurious demand spike. In an example embodiment, to confirm that itis a true overload condition, a short inrush immunity time period may be provided.
Dotted line 46 shows the total current supply if there was no rotation of the supply current.
The current invention thus provides an intelligent way of rotating power supply to a : plurality of providers during overload conditions. This rotation principle allows for current to be supplied to all providers as opposed to only 1 or 2 providers in a high demand, low supply situation, and thus is able to prevent power supply overload/shutdown. A further advantageous feature is that, due to the rotating power supply, generators with smaller kVA ratings may be installed in the base stations 0 i } I
Claims (12)
1. A base station power management system, the base station comprising a power ! supply input and a plurality of power supply outputs for a plurality of providers, respectively, the system comprising: a processor that can access a predefined maximum limit of phase current that the plurality of providers, in combination, can draw; a plurality of sensors to determine the current that each phase of each provider is drawing in real time, the plurality of sensors being in communication with the processor so that this information is available to the processor; and a switching means that can be controlled by the processor, the switching means being associated with each of the plurality of providers so that if the total phase current being drawn by the plurality of providers exceeds the predefined maximum limit of phase current, the switching means can cut power to at least one of the plurality of providers in order to reduce the total phase current.
2. A base station power management system according to claim 1, wherein the switching means can rotate which provider is to have its power cut, so that when the total phase current being drawn by the plurality of providers exceeds the predefined maximum limit of phase current, at least one provider will have its power cut and at least one provider will still have power supply.
3. A base station power management system according to either of the preceding claims, wherein the switching means comprises latching relays 4, A base station power management system according to any one of the preceding claims, wherein the power supply input comprises a mains power supply and power produced by an electrical generator.
-9. i
5. A base station power management system according to claim 4, wherein the system comprises sensors to monitor the mains power supply so that when there is an interruption in the mains power supply, the system is able to automatically switch over to generator power.
6 A base station power management method, the base station comprising a power supply input and a plurality of power supply outputs for a plurality of providers, respectively, the method comprising: determining the current that each phase of each provider is drawing in real time; and cutting power to at least one of the plurality of providers, if the total phase current being drawn by the plurality of providers exceeds the predefined maximum limit of phase current, in order to reduce the total phase current.
7. A base station power management method according to clam 6, the method comprising rotating which provider is to have its power cut, so that when the total phase current being drawn by the plurality of providers exceeds the predefined maximum limit of phase current, at least one provider will have its power cut and at least one provider will still have power supply.
8. A base station power management method according to either claim 5 or claim 6, the method comprising: monitoring the mains power supply; and automatically switching over to generator power when there is an interruption in the mains power supply.
9. A base station power management system, the base station comprising a power supply input and a plurality of power supply outputs for a plurality of providers, respectively, the system comprising: memory to store a predefined maximum limit of phase current that the plurality of providers, in combination, can draw; and a processor to: determine the current that each phase of each provider 1s drawing in real time, and cut power to at least one of the plurality of providers if the total phase current being drawn by the plurality of providers exceeds the predefined maximum limit of phase current, in order to reduce the total phase current.
10. A base station power management system according to clam 9, the processor being arranged to rotate which provider is to have its power cut, so that when the total phase current being drawn by the plurality of providers exceeds the predefined maximum limit of phase current, at least one provider will have its power cut and at least one provider will still have power supply.
11 A base station power management system, substantially as herein described with reference to Figure 1 of the accompanying drawings.
12. A base station power management method, substantially as herein described with reference to Figure 2 of the accompanying drawings.
: : -11- = ®wF2008/06855 DATED THIS 8™ DAY OF AUGUST 2008 i ei GILFILLAN (JOHN & KERNICK) FOR THE APPLICANT
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ZA200806855A ZA200806855B (en) | 2007-07-26 | 2008-08-08 | Base station power management system and method |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ZA200703428 | 2007-07-26 | ||
| ZA200806855A ZA200806855B (en) | 2007-07-26 | 2008-08-08 | Base station power management system and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ZA200806855B true ZA200806855B (en) | 2010-02-24 |
Family
ID=42097132
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ZA200806855A ZA200806855B (en) | 2007-07-26 | 2008-08-08 | Base station power management system and method |
Country Status (1)
| Country | Link |
|---|---|
| ZA (1) | ZA200806855B (en) |
-
2008
- 2008-08-08 ZA ZA200806855A patent/ZA200806855B/en unknown
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