CN101436823A - Control method and control equipment capable of improving communication power supply AC electric network adaptability - Google Patents
Control method and control equipment capable of improving communication power supply AC electric network adaptability Download PDFInfo
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- CN101436823A CN101436823A CNA2008101872670A CN200810187267A CN101436823A CN 101436823 A CN101436823 A CN 101436823A CN A2008101872670 A CNA2008101872670 A CN A2008101872670A CN 200810187267 A CN200810187267 A CN 200810187267A CN 101436823 A CN101436823 A CN 101436823A
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Abstract
The invention relates to a control method for improving the adaptability of communication power to AC power network. The method comprises the following steps of determining a back-preset voltage Vj(V) and an up-preset voltage Vi(V), regulating output voltage of a rectifier module back by one Vj(v) voltage on the basis of the current battery-cell voltage when alternating current is started, taking the voltage regulated back as a regulation starting point, smoothly and gradually raise the output voltage to Vbat+Vi(V), and rapidly raising the voltage to float charge voltage of the communication power from Vabt+Vi. The invention also relates to a control device for improving the adaptability of the communication power to the AC power network. Therefore, on the premise without increasing system cost, the invention reduces the requirements of the communication power on the power supply quality of the AC power network, and improves the adaptability of the communication power under severe AC power supply conditions.
Description
Technical field
The present invention relates to the mobile communication power supply field, relate in particular to a kind of adaptive control method of raising communication power supply AC network and control appliance.
Background technology
Communication base station is most to be built in electric network composition complexity, remote districts that the Alternating Current Power Supply condition is simple and crude, away from the center of supply, make the Alternating Current Power Supply condition of communication base station further worsen: the alternating voltage that the long Distance Transmission of low-voltage circuit causes significantly falls, alternating voltage wide cut vibration when being interfered, the interchange three-phase that phase angle shift causes is asymmetric, because transmission line is long, the cable zero line resistance increase that causes of multiple connection etc. step by step.
The rectification module of communication power supply is the energy conversion function that is used to finish from AC to DC, in recent years, each communication power supply producer researches and develops the rectification module of wide range input voltage one after another, with improve communication power supply to ac grid voltage significantly fall, the adaptive capacity of alternating voltage wide cut vibration.
Relax the input voltage range of rectification module, solved the adaptive capacity that ac grid voltage significantly falls, the alternating voltage wide cut is vibrated to a great extent, but, can not solve effectively but that to exchange the interchange three-phase that the three-phase voltage phase angle shift causes asymmetric, because transmission line is long, the cable practical problems such as zero line resistance increase that cause of multiple connection step by step.Especially in the moment that exchanges the back incoming call that has a power failure, the discharge voltage of storage battery is lower, the energy part powering load of rectification module output, and a part charges a battery, this moment rectification module the output current maximum, rectification module often faces the difficult problem that can not start.
In actual applications, certain communication base station room exchanges about 2 kilometers of inlet wire.In the middle of exchanging zero line tie point is arranged, and to connect wire rod be that aluminum steel and copper cash mix and be intertwined and connected, zero line resistance reaches 10 ohm.The existence of zero line resistance causes rectification module in that to exchange three-phase voltage asymmetric, or input ac voltage fluctuation during the rectification module heavy load starting, and rectification module constantly enters guard mode, and communication power supply is output not.
Traditional control method is when AC starting, and the rectification module output voltage is Qi Tiaodian with the current magnitude of voltage+Vi of storage battery (V), upwards increases with steeper slope; This rectification module output voltage curve as shown in Figure 1.Among Fig. 1, T1 exchanges power failure constantly; T2 Alternating Current Power Supply constantly recovers; Vbat shows the minimum voltage that exchanges the back battery discharge that has a power failure; After Vbat+Vi showed that Alternating Current Power Supply recovers, the control of rectification module output voltage was Qi Tiaodian with the minimum voltage+Vi (V) that exchanges the back battery discharge that has a power failure; And 53.5V is the communication power supply float charge voltage.And this method has strict requirement to AC network power supply quality, equipment application conditions.
Summary of the invention
Technical problem to be solved by this invention provides a kind of adaptive control method of raising communication power supply AC network and control appliance, solve in the prior art rectification module in that to exchange three-phase voltage asymmetric, or the problem of input ac voltage fluctuation during the rectification module heavy load starting.
In order to solve the problems of the technologies described above, the invention provides the adaptive control method of a kind of raising communication power supply AC network, this method may further comprise the steps:
Determine a pre-readjustment voltage Vj (V), and the pre-voltage Vi (V) that raises;
When AC starting, the output voltage of rectification module is adjusted back a Vj (v) voltage on the basis of current battery tension Vbat;
As opening the accent point, stably output voltage is risen to gradually Vbat+Vi (V) with the voltage behind the readjustment;
From Vabt+Vi, fast voltage is risen to the communication power supply float charge voltage.
The described step that stably output voltage is risen to Vbat+Vi (V) is with default step delta V, upwards increases gradually.
In the steady uphill process of voltage, further comprise: monitor the charge in batteries electric current in real time, and compare,, in next adjustment cycle, revise Δ V, to prevent accumulator super-charge according to comparative result with the maximum charge in batteries electric current that allows.
Described pre-readjustment voltage Vj (V) and described pre-rise voltage Vi (V) adjust according to the Alternating Current Power Supply situation and the rectification module configuration of communication base station respectively.
The present invention also provides a kind of raising communication power supply AC network adaptive control appliance, and this control appliance comprises:
Callback module is used for when AC starting, and the output voltage of rectification module is adjusted back a predeterminated voltage Vj (v) on the basis of current battery tension Vbat;
Slowly start module, be used for the readjustment after voltage as opening the accent point, stably output voltage is risen to gradually Vbat+Vi (V);
The fast module that starts is used for from Vabt+Vi, fast voltage is risen to the communication power supply float charge voltage.
The described module that starts slowly with default step delta V, upwards increases output voltage gradually.
Described device further comprises: monitoring modular is used for monitoring the charge in batteries electric current in real time at the steady uphill process of voltage, and compare with the maximum charge in batteries electric current that allows, according to comparative result, in next adjustment cycle, revise Δ V, to prevent accumulator super-charge.
Therefore, the present invention reduces the requirement of communication power supply to the AC network power supply quality under the prerequisite that does not increase system cost, improves the adaptability of communication power supply under abominable Alternating Current Power Supply condition.
Description of drawings
Fig. 1 is a rectification module output voltage curve chart in the prior art;
Fig. 2 is a kind of flow chart that improves the adaptive control method of communication power supply AC network of the present invention;
Fig. 3 is for utilizing rectification module output voltage curve chart after the inventive method;
Fig. 4 is a rectification module output voltage curve comparison diagram under prior art and the control method of the present invention.
Embodiment
Main thought of the present invention is: by adaptive control method of a kind of communication power supply AC network and control appliance are provided, when the communication power supply AC starting, increase a transition stage, the start-up control point in this stage is a reverse regulation voltage Vj who is lower than the current magnitude of voltage of storage battery, and then with Δ V be step-length slowly regulate output given, open and stable power output so that the control rectification module is reliable, communication power supply is asymmetric to the AC network three-phase, the susceptibility of zero line resistance thereby reduced, and improves the AC network adaptive capacity of communication power supply.
Below by drawings and Examples, the technical scheme of the embodiment of the invention is described in further detail.As shown in Figure 2, for a kind of flow chart that improves the adaptive control method of communication power supply AC network of the present invention, this control method comprises the steps:
Step 204 from Vabt+Vi, rises to voltage the communication power supply float charge voltage fast.
Therefore, during AC starting, rectification module enters opening; Adjusting the output control of rectification module, is Qi Tiaodian with the current magnitude of voltage-Vj of storage battery (V), is step-length with Δ V, upwards increases gradually; Monitor the charge in batteries electric current in real time, and make comparisons, in next adjustment cycle, revise Δ V, to prevent accumulator super-charge with the maximum charge in batteries electric current that allows; Rise to Vbat+Vi (V) until the rectifier output voltage, this moment, rectification module was finished the transient process that bringing onto load never loads to stable output.
Promptly, when the communication power supply AC starting, increase a transition stage, the start-up control point in this stage is a reverse regulation voltage Vj who is lower than the current magnitude of voltage of storage battery, and the rectification module output voltage curve that utilizes this method as shown in Figure 3, exchange the back incoming call that has a power failure, the rectification module output voltage is Qi Tiaodian with the current magnitude of voltage-Vj of storage battery (V), upwards increases gradually; T1 exchanges power failure constantly among Fig. 3; T2 Alternating Current Power Supply constantly recovers; T3 transition stage constantly finishes, and transition stage is finished the slow start-up control of rectification module; Vbat shows the minimum voltage that exchanges the back battery discharge that has a power failure; After Vbat-Vj showed that Alternating Current Power Supply recovers, the control of rectification module output voltage was Qi Tiaodian with the minimum voltage-Vj (V) that exchanges the back battery discharge that has a power failure; Vbat+Vi shows that rectification module output voltage control reaches the minimum voltage+Vi (V) that exchanges the back battery discharge that has a power failure, and this moment, rectification module was finished the transient process that bringing onto load never loads to stable output; 53.5V be the communication power supply float charge voltage.
In order to show advantage of the present invention more significantly,, be rectification module output voltage curve comparison diagram under prior art and the control method of the present invention referring to Fig. 4.Among Fig. 4, the prior art curve is 1, and curve of the present invention is 2; T1 exchanges power failure constantly; T2 Alternating Current Power Supply constantly recovers; T3 transition stage constantly finishes, and transition stage is finished the slow start-up control of rectification module; Vbat shows the minimum voltage that exchanges the back battery discharge that has a power failure; After Vba-Vj showed that Alternating Current Power Supply recovers, the control of rectification module output voltage was Qi Tiaodian with the minimum voltage-Vj (V) that exchanges the back battery discharge that has a power failure; Vbat+Vi shows that rectification module output voltage control reaches the minimum voltage+Vi (V) that exchanges the back battery discharge that has a power failure, and this moment, rectification module was finished the transient process that bringing onto load never loads to stable output; 53.5V be the communication power supply float charge voltage.Compared with prior art control reliable unlatching of rectification module and stable power output, communication power supply is asymmetric to the AC network three-phase, the susceptibility of zero line resistance thereby reduced, and improves the AC network adaptive capacity of communication power supply.
Be example with a 300A DC power-supply system that constitutes by 6 50A/48V rectification modules below, to the technical scheme checking that experimentizes, this scheme elaborated in conjunction with the accompanying drawings.
Experimental facilities:
1,300A DC power-supply system, 6 of 50A/48V rectification modules (being distributed in 1#～6# groove position), direct current output 53.5V/115.7A, the civil power input, one group of battery 500AH, system chassis make joint grounding and handle.
2, seal in slide-wire rheostat in the zero line, be used for the zero line resistance that the simulated field ac power supply system may exist.
Experiment purpose: the back incoming call that observe to exchange has a power failure, rectification module output voltage open transfers the influence to communication power supply work of point voltage, zero line resistance.
Experimental technique: determine earlier the slide-wire rheostat resistance, the method that adds electric starting system is again tested, with simulated field application scenarios more truly.
Description of test:
1, Vn-pe: voltage between zero line and ground wire; Measurement point: system's input wires terminal.
2, Rn: the resistance value that zero line N line seals in (only test the resistance value between the slide-wire rheostat here, do not consider the stube cable at two ends)
Experiment one: current magnitude of voltage+1V is Qi Tiaodian with storage battery
Experimental result is as shown in Table 1:
Table one is Qi Tiaodian with the current magnitude of voltage+1V of storage battery
| Sequence number | Vn-pe(Vac) | Rn (ohm) | Phenomenon |
| 1 | 4.6 | 2 | Rectification module is normally exported |
| 2 | 6.5 | 4 | Rectification module is normally exported |
| 3 | The voltage 200V that rises suddenly | 6 | The equal no-output of rectification module |
Test an interpretation of result:
1, under the situation of Alternating Current Power Supply, during zero line resistance R n＜6 ohm, rectification module all can reliably be opened;
2, under the situation of Alternating Current Power Supply, during zero line resistance R n 〉=6 ohm, rectification module can't reliably be opened;
When 3, zero line resistance reached 6 ohm, because the existence of zero line resistance causes the rectification module terminal voltage to be lower than minimum voltage (80V) requirement of work, rectification module can't reliably be opened;
4, this result is applicable to and exchanges three phase supply balance, interchange threephase load configuration equilibrium, because the existence of the precedence difference that rectification module starts, zero line resistance is to the influence of communication power supply work.
Experiment two: current magnitude of voltage-2V is Qi Tiaodian with storage battery
Experimental result is as shown in Table 2:
Table two is Qi Tiaodian with the current magnitude of voltage-2V of storage battery
Test two interpretations of result:
1, under the situation of Alternating Current Power Supply, during zero line resistance R n＜38 ohm, rectification module all can reliably be opened;
2, under the situation of Alternating Current Power Supply, during zero line resistance R n 〉=38 ohm, rectification module can't reliably be opened;
When 3, zero line resistance reached 38 ohm, because the existence of zero line resistance causes the rectification module terminal voltage to be lower than minimum voltage (80V) requirement of work, rectification module can't reliably be opened;
4, this result is applicable to and exchanges three phase supply balance, interchange threephase load configuration equilibrium, because the existence of the precedence difference that rectification module starts, zero line resistance is to the influence of communication power supply work.
Experiment conclusion:
Theory analysis and experimental results show that, take suitable rectification module start-up control method, voltage when being the rectification module startup to be lower than battery tension opens the accent point, power output when reducing the rectification module startup, suitable amplification rectification module never bringing onto load arrives load-carrying transient process, can reduce that communication power supply is asymmetric to the ac power supply system three-phase, the requirement of zero line resistance, improve communication power supply in adaptability complicated, various ac power supply system.
Control method realizes rectification module is opened the voltage control of transferring point by software algorithm, all can not exert an influence to product indexs such as the operating voltage range of communication power supply, working temperature, incoming frequency requirement, lightning protection capability, direct current pressure drop, phone weighted noise, EMC.
Therefore, control method described in the invention has solved that communication power supply can't start in complicated, abominable AC network, inoperable technical barrier.Compared with prior art, reduced the requirement of communication power supply, widened the scope of application of communication power supply the AC network power supply quality.
And, control method described in the invention, the method that exchanges input range with traditional amplification is compared, and does not bring the increase of system cost.For communication power supply manufacturer, under the prerequisite that does not increase system cost, enlarged the product scope of application, promoted product competitiveness, promoted brand value; For communication power supply product at network operation, can reduce engineering cost by the mode of the remote download control module of upgrading in the rectification of network operation product technology, for operator has saved maintenance cost, have important economic value.
Correspondingly, the present invention also provides a kind of raising communication power supply AC network adaptive control appliance, this equipment comprises: callback module, be used for when AC starting, and the output voltage of rectification module is adjusted back a predeterminated voltage Vj (v) on the basis of current battery tension Vbat; Slowly start module, be used for the readjustment after voltage as opening the accent point, stably output voltage is risen to gradually Vbat+Vi (V); The fast module that starts is used for from Vabt+Vi, fast voltage is risen to the communication power supply float charge voltage.
Further, the described module that starts slowly with default step delta V, upwards increases output voltage gradually.And this control appliance also comprises: monitoring modular is used for monitoring the charge in batteries electric current in real time at the steady uphill process of voltage, and compare with the maximum charge in batteries electric current that allows, according to comparative result, in next adjustment cycle, revise Δ V, to prevent accumulator super-charge.
Power output in the time of can adjusting the rectification module startup by this control appliance, suitable amplification rectification module never bringing onto load arrives load-carrying transient process, can reduce that communication power supply is asymmetric to the ac power supply system three-phase, the requirement of zero line resistance, improve communication power supply in adaptability complicated, various ac power supply system.
It should be noted last that, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement the present invention, and not break away from the spirit and scope of technical solution of the present invention and claim.
Claims (7)
1, the adaptive control method of a kind of raising communication power supply AC network is characterized in that, comprises the steps:
Determine a pre-readjustment voltage Vj (V), and the pre-voltage Vi (V) that raises;
When AC starting, the output voltage of rectification module is adjusted back a Vj (v) voltage on the basis of current battery tension Vbat;
As opening the accent point, stably output voltage is risen to gradually Vbat+Vi (V) with the voltage behind the readjustment;
From Vabt+Vi, fast voltage is risen to the communication power supply float charge voltage.
2, the method for claim 1 is characterized in that, the described step that stably output voltage is risen to Vbat+Vi (V) is with default step-length △ V, upwards increases gradually.
3, the method for claim 1, it is characterized in that, in the steady uphill process of voltage, further comprise: monitor the charge in batteries electric current in real time, and compare with the maximum charge in batteries electric current that allows, according to comparative result, in next adjustment cycle, revise △ V, to prevent accumulator super-charge.
4, the method for claim 1 is characterized in that, described pre-readjustment voltage Vj (V) and described pre-rise voltage Vi (V) adjust according to the Alternating Current Power Supply situation and the rectification module configuration of communication base station respectively.
5, the adaptive control appliance of a kind of raising communication power supply AC network is characterized in that, comprising:
Callback module is used for when AC starting, and the output voltage of rectification module is adjusted back a predeterminated voltage Vj (v) on the basis of current battery tension Vbat;
Slowly start module, be used for the readjustment after voltage as opening the accent point, stably output voltage is risen to gradually Vbat+Vi (V);
The fast module that starts is used for from Vabt+Vi, fast voltage is risen to the communication power supply float charge voltage.
6, device as claimed in claim 4 is characterized in that, the described module that starts slowly with default step-length △ V, upwards increases output voltage gradually.
7, device as claimed in claim 4 is characterized in that, further comprises:
Monitoring modular is used for monitoring the charge in batteries electric current in real time at the steady uphill process of voltage, and compares with the maximum charge in batteries electric current that allows, and according to comparative result, revises △ V in next adjustment cycle, to prevent accumulator super-charge.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101847890A (en) * | 2010-05-28 | 2010-09-29 | 中达电通股份有限公司 | Control method for enhancing adaptability of communication power supply to single-phase alternating-current power grid |
| CN103051168A (en) * | 2012-12-28 | 2013-04-17 | 常州龙驰新能源汽车技术有限公司 | Protection method for charging in starting vehicle low voltage DCDC (direct current/direct current) transducer |
| CN105449299A (en) * | 2015-11-17 | 2016-03-30 | 高新兴科技集团股份有限公司 | Floating charge voltage based storage battery remote charge-discharge method |
| CN113961029A (en) * | 2021-12-23 | 2022-01-21 | 苏州浪潮智能科技有限公司 | Method, device and medium for improving output voltage precision |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6246215B1 (en) * | 1999-03-08 | 2001-06-12 | O2 Micro International Limited | Buffer battery power supply system |
| CN1252857C (en) * | 2001-09-26 | 2006-04-19 | 中兴通讯股份有限公司 | Charging method for accumulator |
| US7080273B2 (en) * | 2003-05-02 | 2006-07-18 | Potentia Semiconductor, Inc. | Sequencing power supplies on daughter boards |
| US7623361B2 (en) * | 2005-07-15 | 2009-11-24 | Semiconductor Components Industries, Llc | Power supply soft start controller with no output voltage undershoot when transitioning from skip cycle mode to normal mode |
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2008
- 2008-12-19 CN CN2008101872670A patent/CN101436823B/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101847890A (en) * | 2010-05-28 | 2010-09-29 | 中达电通股份有限公司 | Control method for enhancing adaptability of communication power supply to single-phase alternating-current power grid |
| CN103051168A (en) * | 2012-12-28 | 2013-04-17 | 常州龙驰新能源汽车技术有限公司 | Protection method for charging in starting vehicle low voltage DCDC (direct current/direct current) transducer |
| CN105449299A (en) * | 2015-11-17 | 2016-03-30 | 高新兴科技集团股份有限公司 | Floating charge voltage based storage battery remote charge-discharge method |
| CN105449299B (en) * | 2015-11-17 | 2017-12-08 | 高新兴科技集团股份有限公司 | A kind of long-range charging/discharging thereof of battery based on float charge voltage |
| CN113961029A (en) * | 2021-12-23 | 2022-01-21 | 苏州浪潮智能科技有限公司 | Method, device and medium for improving output voltage precision |
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