CN201789332U - Power supply system of communication base station - Google Patents

Abstract

The utility model discloses a power supply system of a communication base station, which supplies power for a strip-shaped coverage area, and comprises a first remote power transmission cable, a second remote power transmission cable and main and reserve power switching devices, wherein the first remote power transmission cable which implements remote cascade power supply for base stations along the first remote power transmission cable is laid from a near end to a remote end of the strip-shaped coverage area, the second remote power transmission cable which implements remote cascade power supply for base stations along the second remote power transmission cable is laid from the remote end to the near end of the strip-shaped coverage area, a power input end of each base station is provided with the main and reserve power switching devices, and the main and reserve power switching devices achieve automatic switching between the first remote power transmission cable and the second remote power transmission cable. The power supply system of the communication base station has the characteristics that a reserve power supply can reliably achieve seamless switching, and is high in power supply reliability. The base station automatically selects a direction with high voltage to supply power, which is equivalent to reducing the transmission distance and the power loss of transmission lines.

Description

A kind of electric power system of communication base station

Technical field

The utility model relates to the power supply field of communication base station, particularly the communication base station of zonal distribution is carried out the electric power system of centrally connected power supply.

Background technology

In the modern communications equipment, promote the use of the high voltage direct current electric power system gradually, to replace traditional UPS is the communication base station power supply, for example, the man-to-man technical scheme of the general employing of remote electric power system of power supply is provided for the DSLM equipment of user side from local side by digital subscriber, promptly a local supply module is set at the DSL local side, with the local supply module provide-the 48V direct voltage is raised to suitable direct voltage (being generally 280V) and is loaded on the Digital Subscriber Line, at far-end a far end supply module (being generally Switching Power Supply) is set, the far end supply module becomes DSL equipment required voltage for no reason with the voltage transitions that transmits on the Digital Subscriber Line.Here it is usual said direct current remote power feeding source.Such electric power system solves the problem of long-term electricity consumption, but, if the supply line from the end office (EO) to the user side is out of joint, can not provide power supply for the equipment of user side, as scene, (establish as the tunnel of high ferro, highway longer distance along the line, bridge etc. at some specific region length-specifics; Length 10KM, 10 of base station sites), mobile communications network is covered special scenes with fail safe, high reliability request, adopt high pressure (280V) direct current far to supply technology, if electric power system breaks down, then there is the interior communication of bigger scope to interrupt, will be necessarily very social influence, therefore, such system often need also prepare the stand-by power supply provided for oneself in each base station.Such system causes the danger of communication disruption though solved the outage that long-range direct current supply may bring, but the epoch of having got back to each base station configuration ups system, does not meet the needs of modern communications development.

The utility model content

In order to overcome existing long-range DC power-supply system is that the employing UPS of base station electric power system backs up caused deficiency, and the utility model provides a kind of electric power system of communication base station.

The utility model for realizing the technical scheme that its purpose adopts is: a kind of electric power system of communication base station, for the base station of banded overlay area provides electric power system, comprise that laying the article one for enforcement remote subtending in base station along the line power supply from the near-end of described banded overlay area to far-end far supplies the transmission of electricity cable, far-end in described banded overlay area lays a second for enforcement remote subtending in base station along the line power supply to near-end and far supplies the transmission of electricity cable, power input in each base station all is provided with a master, the backup battery switching device, described master, the backup battery switching device is far far realized between the cable automaticallying switch for transmitting electricity for transmission of electricity cable and second in article one.

Concrete, in the electric power system of above-mentioned a kind of communication base station: described active and standby part of power supply switching device comprises two isolating diodes and high voltage direct current circuit breaker, the positive pole of described isolating diode connects described article one respectively and far far supplies the transmission of electricity cable for transmission of electricity cable and second, negative pole all is connected with the input of described high voltage direct current circuit breaker, and the output of described high voltage direct current circuit breaker connects the power input of described base station.

Characteristics of the present utility model:

1, active and standby part of power supply switching can reliably realize seamless switching, power supply reliability height.

2, the base station selects a high direction of voltage to power automatically, is equivalent to reduce transmission range and transmission line power loss.

Below with reference to drawings and Examples, the utility model is carried out comparatively detailed explanation.

Description of drawings

Fig. 1 is the utility model embodiment 1 electric power system block diagram.

Fig. 2 is active and standby part of power supply switching device principle schematic among the embodiment 1.

Embodiment

Embodiment 1, as shown in Figure 1, present embodiment is a kind of for banded overlay area " (as high ferro; highway is along the line; the tunnel; bridge etc.) high density base station chaining distribution special scenes provides the solution of safe and reliable cascade power supply; in the scene of certain specific region length-specific; as high ferro, the tunnel of highway longer distance along the line, bridge etc., length 10KM in the present embodiment, 10 of base station sites, covering has fail safe to mobile communications network, the special scenes of high reliability request, adopt the 280V direct current far to supply technology, by near-end, the far-end both direction is that the remote subtending power supply is implemented in base station along the line.Promptly lay article one respectively in opposite directions by near-end and far-end both direction along the line and far far supply the transmission of electricity cable for transmission of electricity cable and second in the base station, article one, far far basic identical for transmission of electricity cable specification voltage etc. for transmission of electricity cable and second, power input in each base station all is provided with one " active and standby part of power supply switching device ", this switching device mainly adds other functional circuit by isolating diode and high voltage direct current circuit breaker or fuse and constitutes, and is set to the base station power supply by active and standby part.Active and standby part of power supply switching device as shown in Figure 2, active and standby part of power supply switching device is set to the base station power supply by active and standby part, active and standby part of power supply switching device comprises two isolating diodes and high voltage direct current circuit breaker, the positive pole of first isolating diode connects article one far for the transmission of electricity cable, the positive pole of second isolating diode connects second far for the transmission of electricity cable, the negative pole of two isolating diodes all is connected with the input of described high voltage direct current circuit breaker, and the output of described high voltage direct current circuit breaker connects the power input of described base station.Because the unidirectional on state characteristic of isolating diode, arbitrary moment has only a road high input of voltage to power to the base station by isolating diode, and another road input is as backup battery.When main power source power down or voltage were lower than backup battery, backup battery was powered to the base station by isolating diode automatically, does not switch the time difference.When breaking down or the short circuit meeting causes that input current increases in the base station, when reaching high voltage direct current circuit breaker breaking current, the high voltage direct current circuit breaker disconnects and makes the fault base station break away from supply line to avoid influencing other base station.Under the normal power supply state, each base station can be automatically with a higher power supply as main electricity, and another power supply is as backing up power supply (as shown in Figure 1): suppose base station 1, base station 2, base station 3, five of base station 4 and base stations 5 etc. near the base station of first ends since the electrical transmission distance that proximal direction comes less than distal direction, article one far supplies the voltage of transmission of electricity cable in these base stations just to be higher than second and far supplies power transmission line so, article one, far can be higher than the voltage that second far supplies power transmission line for the voltage on the transmission of electricity cable, it is main electricity for the transmission of electricity cable far that the base station is selected article one automatically, and second far is the backup power supply for power transmission line; Five base stations such as base station 6, base station 7, base station 8, base station 9 and base station 10 near the base station of far-end since second far for the electrical transmission distance of power transmission line less than article one far for the transmission of electricity cable, far fall less than article one at these place, base station seconds so and far fall for bus voltage for bus voltage, second far can be higher than article one far for the transmission of electricity cable for bus voltage, it is main electricity for power transmission line far that the base station is selected second automatically, and article one far is the backup power supply for the transmission of electricity cable.When the arbitrary place of bidirectional power supply cable in arbitrary paragraph of 10KM length opens a way (broken string) fault; each base station completely all can by " active and standby part of power supply switching device " with its switching (or maintenance) to wherein one the tunnel being on the power supply of normal power supply state; thereby realize safe and reliable, uninterrupted power supply, guarantee that the base station normally moves.

When even two instantaneous short circuit (swinging cross) fault appears in transmission of electricity cable all fronts any place simultaneously; because local side apparatus is implemented can realize recovering normal power supply in the normal back of detection line after the output overcurrent protection; therefore, relevant base station also just occurs once " restarting " and can not cause blocking-up.

As when permanent short circuit (swinging cross) fault occurring, it is open-circuit condition that the breakdown repair personnel only need in the very first time its transmission of electricity cable fault point to be disposed, then far can recover normal power supply for local side apparatus, it all can recover normal operation in the very first time in all base stations completely.

The advantage of present embodiment

1, active and standby part of power supply switching can reliably realize seamless switching (be zero theoretical switching time), power supply reliability height.

2, the base station selects a high direction of voltage to power automatically, is equivalent to reduce transmission range and transmission line power loss (comparing to power supply with folk prescription).

Condition normal, reliability service that the present embodiment scheme realizes

1, transmission line should adopt Cable structure, the probability minimum of short circuit when promptly circuit breaks down (swinging cross) state.

2, compare this programme with folk prescription to power supply and need lay double cable, increase the cost of cable.

Claims (2)

1. the electric power system of a communication base station, for the base station of banded overlay area provides power supply, comprise that laying the article one for enforcement remote subtending in base station along the line power supply from the near-end of described banded overlay area to far-end far supplies the transmission of electricity cable, it is characterized in that: the far-end in described banded overlay area lays a second for enforcement remote subtending in base station along the line power supply to near-end and far supplies the transmission of electricity cable, and the power input in each base station all is provided with a master who far far realizes between the cable automaticallying switch for transmitting electricity for transmit electricity cable and second in article one, the backup battery switching device.

2. the electric power system of a kind of communication base station according to claim 1, it is characterized in that: described active and standby part of power supply switching device comprises two isolating diodes and high voltage direct current circuit breaker, the positive pole of described isolating diode connects described article one respectively and far far supplies the transmission of electricity cable for transmission of electricity cable and second, negative pole all is connected with the input of described high voltage direct current circuit breaker, and the output of described high voltage direct current circuit breaker connects the power input of described base station.

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