CN201509076U - Remote DC power supply system of movable communication power supply - Google Patents

The utility model discloses a remote DC power supply system of a movable communication power supply which is composed of a near-end control unit connected with 48V DC basic power supply and a far-end control unit connected with a remote base station power supply, the near-end control unit is provided with a circuit module of a DC booster switch mode for converting 48V voltage into 320V-380V DC voltage, the far-end control unit is provided with a voltage buffer circuit module, the near-end control unit transmits the converted DC voltage to at least one far-end control unit, thereby providing power supply to at least one remote base station power supply. The remote DC power supply system does not require to be equipped with an UPS back-up source, which can reduce cost, increase economy and reduce electric energy loss; the remote DC power supply system also can adjust output voltage, automatically adapt over-voltage and under-voltage power supply caused by variable work load in the process of power supply; the remote DC power supply system has simple wiring, does not be limited by geography environment and is convenient to construction and addressing.

The long-range DC power-supply system of mobile communication power supply

Technical field

The utility model relates to a kind of mobile communication power supply, specifically is the long-range DC power-supply system of mobile communication power supply.

Background technology

The construction of mobile communication base station generally all is to carry out around coverage rate, speech quality, returns of investment, construction difficulty or ease, key element such as easy to maintenance.Along with the all-round construction of mobile radio communication and the continuous propelling of 3G network, the development trend of mobile communication base station also must be broadband, big coverage rate construction.Therefore, reconnaissance, power supply, maintenance will become direct the have to problem of overriding concern of networking that influences.

The power supply that being generally the mobile communication base station provides all is an alternating current, in mobile communications network is built, because of communication equipment disperses, civil power inserts difficulty, mains failure or shakiness, human factor power failure etc. communication equipment has been caused very big influence.The equipment that makes is all had higher requirement at aspects such as the operational reliability of installation, addressing, equipment, maintenance workloads.Add in the network application of UPS power devices at traditional civil power, because the unsteadiness of local power supply, and the restriction that is subjected to UPS battery capacity, battery charging and discharging life-span and interruption duration, the raising of communication quality seriously restricted.Owing to need regular visit, regularly battery carried out the loaded down with trivial details work of charge and discharge, therefore increased the system maintenance cost greatly, reduced the economy of system and the functional reliability of communication equipment.

In addition, be the alternating current that the mobile communication base station provided, power factor is generally 0.7-0.8, so the alternating current and the direct current of equal voltage are compared, but the alternating current through-put power is 0.7-0.8 times of direct current, and alternating current is owing to there being power factor to cause the circuit loss, if therefore adopt the direct voltage of 380V to power, can effectively prolong power supply distance and saves energy.

The utility model content

The utility model purpose is to provide a kind of and has incessantly power supply and power supply performance is stable, also has energy-conserving and environment-protective, wiring is simple, not limited by geographical environment, is convenient to construct and the long-range DC power-supply system of the mobile communication power supply of addressing.

To achieve these goals, the technical solution adopted in the utility model is: the long-range DC power-supply system of mobile communication power supply, be to constitute by near-end control unit that is connected with the 48V direct current fundamental power supply of mobile communication central machine room and the Remote Control Unit that is connected with the remote base stations power supply, be provided with in the described near-end control unit the 48V voltage transitions is the circuit module of the DC boosting switching mode of 320V～380V direct voltage, be provided with the voltage buffer circuit module in the described Remote Control Unit, the direct voltage after described near-end control unit is changed by the circuit module of DC boosting switching mode sends more than one Remote Control Unit to.

The circuit module of described DC boosting switching mode is connected with by digital voltage regulating circuit module program software control and that output voltage is carried out the height adjusting according to the distance of power supply distance.

The circuit module of described DC boosting switching mode is connected with and detects power output end voltage and load current, detects and control the detection intelligent protection circuit module of the live load of power supply.

Described voltage buffer circuit module is connected with the unsteady voltage stabilizing circuit module of direct current.

Described voltage buffer circuit module is connected with digital warning circuit module.

The beneficial effects of the utility model: owing to adopt the 48V direct current fundamental power supply of mobile communication central machine room, and the circuit module that utilizes designed DC boosting switching mode boosts this supply voltage and is 320V～380V direct voltage, be the power supply of remote base stations power supply, therefore can not cause the communicating interrupt accident because of the power failure of electric main, this pattern power supply does not need to be equipped with the UPS back-up source yet again, reduced cost, good economy performance has reduced electric energy loss simultaneously; Because the circuit module of DC boosting switching mode also is connected with the digital voltage regulating circuit module by program software control, it adopts the control of power soft start, and very little to the circuit impact, power controlled is good, can regulate between 320V～380V voltage; Because also being connected with, the circuit module of DC boosting switching mode detects the intelligent protection circuit module, can constantly detect power output end voltage and load current by the AD sampling, detect and the live load of control power supply, thereby effectively avoid because circuit or the load infringement accident that the short circuit that causes in the transmission of long line, dew electricity, overload etc. cause; Owing to be connected to Remote Control Unit on the remote base stations power supply, can the voltage that send be cushioned the low-frequency oscillation that the impulse current that produces when eliminating start or load startup causes in long wire loop resistance; Because the voltage buffer circuit module is connected with the unsteady voltage stabilizing circuit module of direct current, it has adopted the buffering voltage stabilizing technique, can adapt to automatically in the power supply process because mistake, the under-voltage power supply of the load system that the live load size variation causes; Since voltage buffer control circuit module be mounted in outdoor communication equipment near, be convenient to very much camouflage, power devices does not rely on local civil power, profile is light and handy, no optional equipment and construction, wiring is simple, not limited by geographical environment, is convenient to construct and addressing.

Description of drawings

The utility model is described in further detail below in conjunction with accompanying drawing.

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is a circuit block diagram shown in Figure 1;

Fig. 3 is the electrical schematic diagram of the circuit module of the DC boosting switching mode shown in the diagram 2;

Fig. 4 is the electrical schematic diagram of the digital voltage regulating circuit module shown in the diagram 2;

Fig. 5 is the electrical schematic diagram of the detection intelligent protection circuit module shown in the diagram 2;

Fig. 6 is the voltage buffer circuit module shown in the diagram 2 and the electrical schematic diagram of digital warning circuit module;

Fig. 7 is the electrical schematic diagram of the unsteady voltage stabilizing circuit module of direct current shown in the diagram 2.

Among the figure: 1, near-end control unit; 2, the circuit module of DC boosting switching mode; 3, digital voltage regulating circuit module; 4, detect the intelligent protection circuit module; 5, composite cable; 6, voltage buffer circuit module; 7, the unsteady voltage stabilizing circuit module of direct current; 8, digital warning circuit module; 9, Remote Control Unit; 10, remote base stations power supply; 11,48V direct current fundamental power supply.

Embodiment

Adopt long-range direct current supply to have following characteristics in the utility model:

1, the dielectric voltage withstand intensity of composite fiber inside conductor is AC 500V grade (DC break down voltage DC1000V), be DC380V (corresponding alternating voltage AC 265V) and Remote Power Supply adopts specified direct-current working volts, well below the limiting voltage of lead, be safe in transmission therefore;

2, direct-current remote feeding power suspend over the ground, to the power supply mode of input isolation, such transmission means is fine to the security of circuit. Because of neutral ground, the live wire of alternating current has voltage to the earth in the time of can effectively avoiding with the civil power AC-powered, and for a long time use meeting of circuit because of drench with rain, moist, aging etc. Leaked Current of Line to Ground even short circuit phenomenon may take place. Therefore direct-current remote feeding power can never cause line accident;

3, direct current supply is owing to adopt switching power unit, and voltage transitions efficient height adopts the control of power soft start, impact very little to circuit, the power controllability is good, has complete fast multiple redundancy protection function for faults such as line load overload, short circuits, and the circuit safety in operation is good;

4, the direct-current remote feeding power input directly uses the machine room dc source, power supply interrupts never, therefore can not cause because of the power failure of electric main the communicating interrupt accident, this pattern power supply is equipped with the UPS back-up source again than electric main powering mode is more economical on using, fault rate is lower.

5, the Alternating Current Power Supply scope of device power supply (DPS) is generally the AC85-275V standard, is the highest input DC388V when being scaled direct current supply, and therefore adopting the powering mode of the highest pressure limiting DC380V also is safe to the terminal consumer.

6, direct current transmission is good to Personal Safety than alternating current. Because the power supply that suspends is adopted in direct current supply, two transmission lines all do not have voltage to the earth, therefore when attendant's repair and maintenance equipment, can not cause electric shock or electric shock accidents even touch because of carelessness single circuit yet.

7, direct-current remote feeding power adopts the following safe voltage of DC60V to carry out wireline inspection when start and circuit zero load, just voltage is brought up to rated operational voltage when load is effectively worked, this pattern can effectively prevent the shock hazard that circuit causes personnel in construction or maintenance process.

Application of the present utility model:

One, environment for use

1, working temperature: Remote Power Supply proximal device-20 ℃～+ 55 ℃;

Remote equipment-40 ℃～+ 70 ℃;

2, storage temperature :-45 ℃～+ 85 ℃;

3, relative humidity: 10%～90%;

4, height above sea level :≤3000m;

5, atmospheric pressure: 70～106KPa;

6, radiating mode: the heat radiation of Remote Power Supply proximal device sampling fan inside, remote equipment adopts natural heat dissipation.

Two, main performance index

1, input voltage: 39V-60V (representative value 48V);

2, output voltage: 300V-350V-380V (can manually arbitrarily switch);

3, peak power output: 800W (650W exports continuously);

4, system effectiveness: 85%;

6, no-load protection electric current 0.01-0.04A;

7 safe mode voltages: 55V low pressure detects, and reduces output voltage automatically when equipment open circuit, zero load, and is very safe to the person like this, gets an electric shock in avoiding safeguarding;

8, the impedance that suspends over the ground: greater than 10M Ω;

9, lightning protection grade: near-end output 10KA, far-end input 20KA.