CN102638037B - The method for controlling power supply of communication equipment, system and electric power system - Google Patents
The method for controlling power supply of communication equipment, system and electric power system Download PDFInfo
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Abstract
The embodiment of the invention discloses a kind of electric power supply control system of communication equipment and method and have the electric power system of this control system, described control system comprises: be arranged at the control switch on three-phase line; Connect the interchange telemetry circuit of three-phase line, it detects the magnitude of voltage of each phase circuit, the phase line conduction that ME for maintenance value is qualified, and when determining the underproof phase circuit of magnitude of voltage, controlling described control switch and disconnect this phase circuit and connect the output of this phase circuit phase circuit qualified with a magnitude of voltage.The embodiment of the present invention is by the detection to the magnitude of voltage of each phase circuit, understand and whether there is defective phase or phase shortage, and when determining to occur defective phase or phase shortage, by qualified be the line powering of phase shortage or defective phase mutually, to ensure normally carrying out of three phase supply.
Description
Technical field
The present invention relates to power supply technique field, more particularly, relate to a kind of method for controlling power supply of communication equipment, system and electric power system.
Background technology
In electric power system, if civil power situation is poor, as there is three-phase alternating current phase shortage (lacking a phase or two-phase), the load dead electricity will voltage being caused to lack phase under normal circumstances.Various equipment in communication system, in general owing to relating to real time communication, higher power supply reliability is had to power requirement, therefore communication power supply all can be equipped with storage battery and back power supply (as oil machine), start when needed (such as being powered by storage battery power supply or startup hydro power generation when civil power situation is poor), to ensure the normal work of communication equipment.
But, when civil power situation is poor, likely can cause oil machine frequent starting, thus cause larger energy resource consumption.
Summary of the invention
In view of this, the embodiment of the present invention provides a kind of electric power supply control system of communication equipment, method and electric power system, with when three-phase alternating current phase shortage, gives disappearance power supply thus reduce oil start mutually, reduce energy resource consumption by normal phase.
The embodiment of the present invention is achieved in that
On the one hand, a kind of electric power supply control system of communication equipment, comprising:
Be arranged at the control switch on three-phase line;
Connect the interchange telemetry circuit of three-phase line, it detects the magnitude of voltage of each phase circuit, the phase line conduction that ME for maintenance value is qualified, and when determining the underproof phase circuit of magnitude of voltage, controlling described control switch and disconnect this phase circuit and connect the output of this phase circuit phase circuit qualified with a magnitude of voltage.
On the other hand, a kind of electric power system of communication equipment, comprises zero line, three-phase input end, output and connects the phase circuit between each phase input and output, also comprise control system as previously described.
On the other hand, a kind of electric power supply control system of communication equipment, is applied to single-phase multiple-way feed system, comprises:
Be arranged at the control switch on many circuits;
Connect the telemetry circuit of each bar circuit, it detects the magnitude of voltage of each bar circuit, when the magnitude of voltage of the circuit determining current use is defective, controls described control switch and disconnects original circuit and the qualified circuit of turn-on voltage value.
On the other hand, a kind of electric power system of communication equipment, many homophase circuits comprising phase input, output and connect between phase input and output, also comprise control system as previously described.
On the other hand, a kind of method for controlling power supply of communication equipment, comprising:
Detect the magnitude of voltage of each phase circuit in three-phase line;
Judging that whether the magnitude of voltage of each phase circuit is qualified, the phase line conduction that ME for maintenance value is qualified, and when determining the underproof phase circuit of magnitude of voltage, controlling this phase circuit and disconnect and connect the output of this phase circuit phase circuit qualified with a magnitude of voltage.
On the other hand, a kind of method for controlling power supply of communication equipment, is applied to single-phase multiple-way feed system, comprises:
Detect the magnitude of voltage of each bar circuit;
When the magnitude of voltage of the circuit determining current use is defective, disconnect original circuit and the qualified circuit of turn-on voltage value.
As can be seen from above-mentioned technical scheme, compared with prior art, the embodiment of the present invention is by the detection to the magnitude of voltage of each phase circuit, understand and whether there is defective phase or phase shortage, and when determining to occur defective phase or phase shortage, by controlling the control switch be arranged on three-phase line, be communicated with the circuit of defective phase or phase shortage and the circuit of other qualified phases, namely by qualified be the line powering of phase shortage or defective phase mutually, to ensure normally carrying out of three phase supply.And this process can be realized by interchange telemetry circuit and three switches, structure is simple, clear logic.
In addition, control switch has Chang Kai and normally closed two kinds of contacts, and any time only has a kind of closing of contact, realizes mechanical interlocked while can ensureing electric blocking, avoids short circuit hidden danger, improves safety and reliability.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The structural representation of the electric power supply control system of a kind of communication equipment that Fig. 1 provides for the embodiment of the present invention;
The structural representation of the electric power supply control system of the another kind of communication equipment that Fig. 2 provides for the embodiment of the present invention;
The structural representation of the electric power supply control system of another communication equipment that Fig. 3 provides for the embodiment of the present invention;
The particular circuit configurations schematic diagram of the electric power supply control system of a kind of communication equipment that Fig. 4 provides for the embodiment of the present invention;
The structural representation of control switch in the electric power supply control system of a kind of communication equipment that Fig. 5 provides for the embodiment of the present invention;
Described contactor in the electric power supply control system of a kind of communication equipment that Fig. 6 provides for the embodiment of the present invention controls in drive circuit, the coil of each contactor and the syndeton schematic diagram of each phase circuit in described control switch;
The structural representation of the electric power supply control system of another communication equipment that Fig. 7 provides for the embodiment of the present invention;
The flow chart of the method for controlling power supply of a kind of communication equipment that Fig. 8 provides for the embodiment of the present invention;
The flow chart of the method for controlling power supply of the another kind of communication equipment that Fig. 9 provides for the embodiment of the present invention.
Embodiment
Embodiments provide a kind of technical scheme, judge whether to there is phase shortage or defective phase by the magnitude of voltage detected on three-phase line, and determining to there is phase shortage or defective phase time, by qualified be the line powering of phase shortage or defective phase mutually, to ensure normally carrying out of three phase supply.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The electric power supply control system of a kind of communication equipment that the embodiment of the present invention provides comprises: the magnitude of voltage of control switch and detection three-phase line is to control the interchange measurement and control unit of described control switch work according to testing result.Control switch with exchange measurement and control unit and can have different version, describe in detail below by several object lesson.
Example one
Fig. 1 shows the one possibility structure of described electric power supply control system, comprises control switch and exchanges measurement and control unit, wherein:
Described control switch comprises three contactors, and be placed on different phase circuits, each contactor comprises normally opened contact and normally-closed contact, and described normally opened contact is arranged on phase circuit, accepts place phase line input, to power to output when closed; Described normally-closed contact connects the normally opened contact of described normally opened contact near one end of line output and adjacent tentaculum near one end of line output, other contactor place phase line inputs are accepted, to power to the output of this contactor place phase circuit when closed.
Concrete, described control switch comprises KM1, KM2 and KM3, and these contactors are interchange four pole contactor, comprises two pairs of normally opened contacts and two pairs of normally-closed contacts respectively, wherein:
The normally opened contact of KM1 is arranged on A phase circuit, and the normal opened contact of KM2 is arranged on B phase circuit, and the normal opened contact of KM3 is arranged on C phase circuit.
Normally-closed contact one end of KM1 connects the normally opened contact of KM1 near one end of phase line output, and the other end of the normally-closed contact of KM1 connects the normally opened contact of KM2 near one end of phase line output; Normally-closed contact one end of KM2 connects the normally opened contact of KM2 near one end of phase line output, and the other end of the normally-closed contact of KM2 connects the normally opened contact of KM3 near one end of phase line output; One end of the normally-closed contact of KM3 connects the normally opened contact of KM3 near one end of phase line output, and the other end of the normally-closed contact of KM3 connects the normally opened contact of KM1 near one end of phase line output.
Described interchange measurement and control unit is made up of several coil, and these coils control the closed of above-mentioned KM1, KM2 and KM3 respectively or disconnect.Concrete, described interchange monitoring unit is made up of coil KM1 ', coil KM2 ' and coil KM3 ', and wherein, KM1 ' connects A phase circuit and zero line N, KM2 ' connect B phase circuit and zero line N, KM3 ' connect C phase circuit and zero line N.
Operationally, under normal circumstances, three-phase input is normal for native system, namely the magnitude of voltage of A, B and C phase circuit is qualified, then KM1 ', KM2 ' and KM3 ' obtain electric, and the normally opened contact in corresponding KM1, KM2 and KM3 is closed, normally-closed contact disconnects, and are powered to three-phase output by normally opened contact.KM1 ' the dead electricity when the magnitude of voltage of A phase circuit is defective, and the magnitude of voltage of B phase circuit is qualified, then the normally opened contact of KM1 disconnects, normally-closed contact closes, and is communicated with the output of B phase circuit and A phase circuit thus, namely to be exported to A phase circuit by B phase circuit and powers.In like manner, when magnitude of voltage that is C phase circuit is qualified when the magnitude of voltage of B phase circuit is defective, export power supply by C phase circuit to B phase circuit; When magnitude of voltage that is A phase circuit is qualified when the magnitude of voltage of C phase circuit is defective, export power supply by A phase circuit to C phase circuit.In addition, when the magnitude of voltage of any two phase circuits is defective, export power supply to the underproof phase circuit of above-mentioned two magnitudes of voltage by the phase circuit that the magnitude of voltage be left is qualified.Such as: when the magnitude of voltage of A, B phase circuit is all defective, be connected with the output of B phase circuit by the closed normally-closed contact of C phase circuit via KM2, be connected with the output of A phase circuit with the closed normally-closed contact of KM1 by the closed normally-closed contact of KM2 simultaneously, namely export power supply by C phase circuit to A, B phase circuit.
In system, the control logic relation of each phase voltage disappearance and deciliter action of corresponding trigger is as shown in table 1, and wherein, "+" represents that coil obtains electric, and "-" represents coil losing electricity.
Table 1
| KM1’ | KM2’ | KM3’ | |
| Normal condition | + | + | + |
| A phase lacks | - | + | + |
| B phase lacks | + | - | + |
| C phase lacks | + | + | - |
| AB phase lacks | - | - | + |
| AC phase lacks | - | + | - |
| BC phase lacks | + | - | - |
Magnitude of voltage described above is qualified refers to magnitude of voltage non-vanishing (namely not phase shortage) or magnitude of voltage lower than pre-determined threshold (general, when magnitude of voltage is lower than certain value, cannot to support the operation of contactor).
The embodiment of the present invention is by the detection to the magnitude of voltage of each phase circuit, when detecting defective phase or phase shortage, by controlling the control switch be arranged on three-phase line, be communicated with the circuit of defective phase or phase shortage and the circuit of other qualified phases, namely by qualified be the line powering of phase shortage or defective phase mutually, to ensure normally carrying out of three phase supply.And, this process is by connecing identical phase circuit by coil and the contactor controlled by coil, the magnitude of voltage of phase circuit whether qualified be reacted directly into coil electric, dead electricity, and coil dead electricity be reacted in contactor often open, the disconnection of normally-closed contact and closed, logic is simple, clear, structural reduction, equipment cost is lower.Meanwhile, adopt the control switch with normally-open normally-close contact, make any time only have a kind of closing of contact, realize mechanical interlocked while can electric blocking being ensured, avoid short circuit hidden danger, improve safety and reliability.
Example two
Fig. 2 illustrates the another kind possibility structure of described electric power supply control system, comprises control switch and exchanges measurement and control unit, wherein:
The structure of described control switch is different from the structure of the control switch in example one, and difference is that normally-closed contact is contrary with normally opened contact position.Described control switch comprises three contactors equally, is placed on different phase circuits, and the normally-closed contact of each contactor is arranged on phase circuit, accepts place phase line input, to power to output when closed; Normally opened contact then connects the normally-closed contact of described normally-closed contact near one end of line output and adjacent tentaculum near one end of line output, other contactor place phase line inputs are accepted, to power to the output of this contactor place phase circuit when closed.
Concrete, described control switch comprises KM4, KM5 and KM6, wherein:
The normally-closed contact of KM4 is arranged on A phase circuit, and the normally closed contact of KM5 is arranged on B phase circuit, and the normally closed contact of KM6 is arranged on C phase circuit.
Normally opened contact one end of KM4 connects the normally-closed contact of KM4 near one end of phase line output, and the other end of the normally opened contact of KM4 connects the normally-closed contact of KM5 near one end of phase line output; Normally opened contact one end of KM5 connects the normally-closed contact of KM5 near one end of phase line output, and the other end of the normally opened contact of KM5 connects the normally-closed contact of KM6; One end of the normally opened contact of KM6 connects the normally-closed contact of KM6 near one end of phase line output, and the other end of the normally opened contact of KM6 connects the normally-closed contact of KM7 near one end of phase line output.
Described interchange measurement and control unit comprises multiple electronic circuit, each electronic circuit be connected with not isopen road and with the contactor one_to_one corresponding in described control switch.
Each electronic circuit includes testing circuit 21, comparison circuit 22 and contactor and controls drive circuit 23, wherein:
Described testing circuit 21 connects phase circuit to detect the magnitude of voltage of this phase circuit.
Described comparison circuit 22 is connected with described testing circuit 21, the magnitude of voltage detected and preset value to be compared.
Described contactor controls drive circuit 23 (being hereafter referred to as drive circuit) and connects described comparison circuit 22, there is the coil 24 and driver element 25 that connect each phase circuit, this driver element 25 is for when defective according to comparative result determination magnitude of voltage, the coil 24 of this phase circuit of connection is made to obtain electric, to disconnect normally-closed contact in corresponding contactor and closed normally opened contact, thus connect the output of this phase circuit and the phase circuit of other qualified voltage value, namely powered by the phase circuit of described qualified voltage value.
In practical operation, whether whether qualified magnitude of voltage is can be zero to determine according to magnitude of voltage, and magnitude of voltage is zero is defective (meaning phase shortage), otherwise, mean that magnitude of voltage is qualified.And in the other embodiment of the present invention, described magnitude of voltage is qualified also can refer to that magnitude of voltage is lower than preset value, such as, normal voltage value is 220VAC, as half (i.e. 110VAC) lower than this normal value, determines that magnitude of voltage is defective.The concrete numerical value of preset value can set according to actual needs.
Fig. 3 with Fig. 4 respectively illustrates the described concrete logic module schematic diagram of one and the particular circuit configurations figure that exchange measurement and control unit.
As can be seen from Figure 3:
The electronic circuit corresponding with each coil comprises: described detecting unit 21 comprises transformer 31 and rectifying and wave-filtering partial pressure unit 32, and this rectifying and wave-filtering partial pressure unit 32 connects described transformer 31 output, for carrying out rectification, filtering and point press operation.
Described comparing unit 22 comprises operational amplifier 33, and its negative input end connects the output of described rectifying and wave-filtering partial pressure unit 32, and positive input terminal is by voltage stabilizing didoe ground connection, and voltage keeps preset value.
Described driver element 25 comprises controllable silicon 34 and relay 35, and wherein, the conducting when the output of the operational amplifier 33 connected has voltage of described controllable silicon 34, ends when this output does not have voltage; Described relay one end connects described controllable silicon, other end ground connection, the coils connected in series that its contact is corresponding with place electronic circuit.
Coil (as KM1 ') one end that described electronic circuit is corresponding connects zero line, the other end is connected with each phase circuit by diode, described diode cathode connects each phase circuit, negative lead circle, also namely: connect a circuit be connected with each phase circuit by diode (circuit L).
Fig. 4 embodies the physical circuit exchanging measurement and control unit on the whole, is described in detail below to its structure:
X1, X2 and X3 are three transformers, and specification is that AC220V is converted to 12V-0-12V, after rectifier diode D1, D3, D5, filter capacitor C1, C2, C3, obtain comparatively stable 12V direct current.
VR1, VR2, VR3 are the adjustable resistance of maximum 10K, and ZD1, ZD2, ZD3 are three voltage stabilizing didoes, voltage of voltage regulation 5.1V, and as the input of amplifier anode, ZD4, ZD5, ZD6 are three voltage stabilizing didoes, and voltage of voltage regulation 5.1V, in order to power to relay coil; IC1, IC2, IC3 are three amplifiers, and T1, T2, T3 are three controllable silicons, and RL1, RL2, RL3 are three relays, and control voltage is DC5V, contact voltage AC250V, electric current 2A.
For to the control of A phase circuit (to B, the mode of the control of C phase circuit and process are substantially identical therewith), under normal circumstances, when being input as 220V, after X1, voltage becomes DC12V, regulate VR1, VR2, VR3 resistance value is 5K, through R1, after VR1 dividing potential drop, amplifier negative terminal input voltage is: 12*5/6=10V, positive terminal voltage is 5.1V, therefore operational amplifier IC1 output no-voltage, T1 not conducting, RL1 relay contact disconnects, coil KM1 ' disconnects, KM1 normally-closed contact is in closure state, A phase circuit inputs to and exports power supply, if B, the magnitude of voltage of C phase circuit is also normal, then three-phase normal power supply.And when input voltage will for 112V time, the same IC1 of can be calculated negative terminal input voltage is 5.1V, now IC1 is in critical condition, when voltage declines further, the input of IC1 negative terminal is less than anode input, IC1 output output voltage, trigger T1 conducting, 5V direct current loads on relay R L1 coil by T1, drives the conducting of RL1 relay contact, the loop of closing coil KM1 ', be energized to coil KM1 ', drive the action of KM1 contacts of contactor, KM1 normally-closed contact disconnects, normally opened contact closes, and exports to A phase power by B phase circuit.
Therefore, now 112V be exactly system commutation critical voltage point (namely magnitude of voltage be higher than 112V qualified, otherwise defective).In real work, can by regulating VR1 resistance value size, can the critical commutation voltage value of regulating system within the specific limits.
In system, the control logic relation of each phase voltage disappearance and deciliter action of corresponding trigger is as shown in table 2, and wherein, "+" represents that coil obtains electric, and "-" represents coil losing electricity.
Table 2
| KM1’ | KM2’ | KM3’ | |
| Normal condition | - | - | - |
| A phase lacks | + | - | - |
| B phase lacks | - | + | - |
| C phase lacks | - | - | + |
| AB phase lacks | + | + | - |
| AC phase lacks | + | - | + |
| BC phase lacks | - | + | + |
The scheme that this example provides can when detecting defective phase or phase shortage, by qualified be the line powering of phase shortage or defective phase mutually, to ensure normally carrying out of three phase supply.And also adopt the control switch having normally-open normally-close contact, make any time only have a kind of closing of contact, realize mechanical interlocked while can electric blocking being ensured, avoid short circuit hidden danger, improve safety and reliability.Meanwhile, can pass through to regulate the mode of related resistors resistance to adjust the concrete data of qualified voltage value, to use the various demands in real work, convenient, flexible.In addition, the present embodiment adopts parallel three phase redundant power supply, namely coil (as KM1 ') one end connects zero line, the other end is connected with each phase circuit by diode, described diode cathode connects each phase circuit, negative lead circle, and this mode can ensure whenever to provide maximum voltage to carry out driving power supply to contactor, thus when preventing brownout or dead electricity, contactor cannot action, and then improve reliability.
Example three
Fig. 5 illustrates the another possibility structure of described electric power supply control system, comprises control switch and exchanges measurement and control unit, wherein:
Described control switch comprises: multiple contactor being arranged at the contactor on phase circuit respectively and being arranged between phase circuit.Concrete, comprising:
Be placed in the contactor KMA on A phase circuit, the contactor KMB be placed on B phase circuit, the contactor KMC be placed on C phase circuit, and the contactor KM1 between A phase circuit and B phase circuit, the KM2 between B phase circuit and C phase circuit, described KM1 two ends connect circuit between circuit between KMA and A phase line output, KM2 and B phase line output respectively, and described KM2 two ends connect circuit between circuit between KM2 and B phase line output, KM3 and C phase line output respectively.
The contactor that described interchange telemetry circuit comprises the described comparison circuit of testing circuit, comparison circuit and connection controls drive circuit, wherein: described testing circuit connects each phase circuit to detect the magnitude of voltage of each phase circuit; Described comparison circuit is connected with described testing circuit, the magnitude of voltage detected and preset value to be compared; Described contactor controls drive circuit, has the coil of each phase circuit of controllable silicon, relay and connection, wherein, and the conducting when the magnitude of voltage of the comparative result instruction phase circuit of described comparing unit is qualified of described controllable silicon, otherwise cut-off; Described relay one end connects described controllable silicon, other end ground connection, its contact and the coils connected in series connecting corresponding phase circuit.
Shown in testing circuit, comparison circuit with Fig. 4 in example two above, Elementary Function of the same name is substantially identical, and the structure major part of contactor control drive circuit also in Fig. 4 is identical, difference is in this example, the series circuit of coil can increase other and control contact, please refer to Fig. 6, for contactor described in the present embodiment controls in drive circuit, the coil of each contactor and the syndeton of each phase circuit in described control switch, comprising:
Connect coil KMA ', the coil KMB ' of zero line and all phase circuits, coil KMC ', coil KM1 ' and coil KM2 ', its coil KMA ', coil KMB ' and coil KMC ' are respectively used to control closing or disconnection of described KMA, KMB and KMC.
First switch 601 of connecting with described KMA ', KMB ', KMC ', KM1 ' and KM2 ' respectively, second switch 602, the 3rd switch 603, the 4th switch 604 and the 5th switch 605, described first switch 601 and the 4th switch 604 be the normally opened contact of same relay (RL1 in Fig. 4) and normally-closed contact each other, and described 3rd switch 603 and the 5th switch 605 be the normally opened contact of same relay (RL3 in Fig. 4) and normally-closed contact each other.
Six switch 606 in parallel with the 4th switch 604, described 6th switch 606 and second switch 602 RL2 each other in same relay Fig. 4) normally opened contact and normally-closed contact.
Connect with described KM1 ' and the 7th switch 607 controlled by KMB ', and the 8th switch 608 that is in parallel with described 7th switch 607 and that control by KMA '.
9th switch 609 of connecting with described KM2 ' and the tenth switch 610, ten one switch 611 in parallel with described 9th switch 609, and the twelvemo in parallel with described tenth switch 610 closes 612, and close 612 the 13 switches 613 in parallel with described twelvemo, wherein, 9th switch 609, the tenth switch the 610 and the 13 switch 613 control by KMB ', KMA ' and KM1 ' respectively, and the 11 switch 611 and twelvemo are closed 612 and all controlled by KMC '.
Native system operationally, when three-phase is normal, KMA, KMB, KMC closes, KM1, KM2 disconnects, system exports three-phase, when exchanging telemetry circuit and A phase voltage disappearance or voltage being detected lower than a certain set point, disconnect KMA, even if RL1 coil obtains electric, disconnect to make the first switch (normally-closed contact of RL1), and after confirming that KMA disconnects, through Preset Time time delay (such as 10S, concrete delay time can regulate according to actual conditions) after, closed KM1, i.e. closed 4th switch (normally opened contact of RL1), KM1 ' is obtained electric, powered by the relative A phase of normal B, when A, B are identical during disappearance, disconnect KMA, KMB, and after confirming that KMA, KMB disconnect, after Preset Time time delay (such as 10S), closed KM1, KM2, power to fault phase A, B time identical with normal phase C, ensure follow-up load normal power supply, detailed control logic figure in table 3, wherein, "+" represents that coil obtains electric, and "-" represents coil losing electricity.
Table 3
In described control switch shown in Fig. 6, the coil of each contactor with the implementation procedure of the electric blocking of the syndeton of each phase circuit is: when KMA and KMB closes (being controlled by KMA ', KMB ' adhesive simultaneously) simultaneously, (namely the 4th switch 604 and the 6th switch 606 disconnect in the normally-closed contact disconnection of contactor KMA, KMB, first switch 601 and second switch 602 close), KM1 ' loop disconnects, contactor KM1 is disconnected, ensures to there will not be short trouble between A, B phase; And when KMB and KMC closes (being controlled by KMB ' and KMC ' adhesive simultaneously) simultaneously, the normally-closed contact of contactor KMB, KMC disconnects (the 9th switch 609,11 switch 611 disconnects), the loop of KM2 ' disconnects, KM2 can not close, and there will not be short trouble between B, C phase; When KMA, KMC, KM1 are simultaneously closed, KM1, KMA, KMC disconnect simultaneously, and KM2 ' loop disconnects, and KM2 can not close, and there will not be short trouble between A, C phase.
Technological thought of the present invention can also be expanded for single-phase multiple-way feed system, when a certain road of load powers failure, automatically switches to other route and powers, and ensures power supply reliability.
Fig. 7 shows single-phase duplex feeding structure chart, as shown in the figure, comprises control switch and telemetry circuit, and wherein, described control switch is that KMD is made up of normally-closed contact and normally opened contact, and concrete structure can refer to the structure of the contactor KM1 in embodiment above; Described telemetry circuit connects phase circuit and zero line, detect the magnitude of voltage of A circuit and B circuit, when the magnitude of voltage of the circuit determining current use is defective, controls described control switch and disconnect original circuit (A circuit) and the qualified circuit (B circuit) of turn-on voltage value.
Described telemetry circuit is specially the coil KMD ' controlling described control switch, its upper and lower normally-closed contact of electric control KMD and keying of normally opened contact.
It should be noted that, the electric power system comprising the control system that each embodiment above provides belongs to protection category of the present invention too.
In addition, also provide the method realizing above-mentioned control system control procedure herein, i.e. a kind of method for controlling power supply of communication equipment, basic procedure as shown in Figure 8, comprises the following steps:
The magnitude of voltage of each phase circuit in step S81, detection three-phase line;
Step S82 judges that whether the magnitude of voltage of each phase circuit is qualified, if qualified, then enters step S83; Otherwise enter step S84.
The phase line conduction that step S83, ME for maintenance value are qualified.
Step S84, control this phase circuit and disconnect and connect the output of this phase circuit phase circuit qualified with a magnitude of voltage.
The realization of each step also can control the keying realization of the contactor be arranged on described three-phase line, the structure of contactor by coil, and the syndeton of contactor, coil and three-phase line please refer to the content of components of system as directed above, does not repeat them here.
Control system shown in corresponding diagram 7, also provides a kind of method for controlling power supply herein, and its basic procedure as shown in Figure 9, comprises the following steps:
Step S91, detect the magnitude of voltage of each bar circuit;
Step S92, when the magnitude of voltage of the circuit determining current use is defective, disconnect original circuit and the qualified circuit of turn-on voltage value.
Particular content also with reference to the related content of system embodiment above, can not repeat at this equally.
It should be noted that, in this specification, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.For device disclosed in embodiment, because it corresponds to the method disclosed in Example, so description is fairly simple, relevant part illustrates see method part.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (7)
1. an electric power supply control system for communication equipment, is characterized in that, comprising:
Be arranged at the control switch on three-phase line;
Connect the interchange telemetry circuit of three-phase line, it detects the magnitude of voltage of each phase circuit, the phase line conduction that ME for maintenance value is qualified, and when determining the underproof phase circuit of magnitude of voltage, controlling described control switch and disconnect this phase circuit and connect the output of this phase circuit phase circuit qualified with a magnitude of voltage;
Wherein, described control switch comprises three contactors, and be placed on different phase circuits, each contactor includes: normally opened contact and normally-closed contact;
Described normally opened contact is arranged on phase circuit, accepts place phase line input, to power to output when closed; One end of described normally-closed contact connects described normally opened contact one end near line output, the normally opened contact that the other end connects adjacent tentaculum is near one end of line output, other contactor place phase line inputs are accepted, to power to the output of this contactor place phase circuit when closed;
Or,
Described normally-closed contact is arranged on phase circuit, accepts place phase line input, to power to output when closed; One end of described normally opened contact connects described normally-closed contact one end near line output, the other end connects with the normally-closed contact of adjacent tentaculum near one end of line output, other contactor place phase line inputs are accepted, to power to the output of this contactor place phase circuit when closed;
When the magnitude of voltage of any two phase circuits is defective, the phase circuit qualified by the magnitude of voltage be left exports power supply to underproof described two the phase circuits of magnitude of voltage.
2. control system according to claim 1, is characterized in that, described interchange telemetry circuit specifically connects zero line respectively by three and forms with the coil on not isopen road, and each coil is corresponding with the contactor on its same line;
The normally opened contact of each described contactor is closed when the coil that this contactor is corresponding powers on, and disconnect, and the normally-closed contact of each described contactor disconnects when the coil that this contactor is corresponding powers on during power down, closed during power down.
3. control system according to claim 1, is characterized in that, described interchange telemetry circuit comprises multiple electronic circuit, each electronic circuit be connected with not isopen road and with the contactor one_to_one corresponding in described control switch, described electronic circuit comprises:
Connect phase circuit to detect the testing circuit of the magnitude of voltage of this phase circuit;
Be connected with described testing circuit, with the comparison circuit that the magnitude of voltage detected and preset value are compared;
The contactor connecting described comparison circuit controls drive circuit, there is the coil and driver element that connect each phase circuit, this driver element is used for when according to the phase circuit of comparative result determination magnitude of voltage lower than described preset value, the coil of this phase circuit of connection is made to obtain electric, to disconnect normally-closed contact in corresponding contactor and closed normally opened contact.
4. control system according to claim 3, is characterized in that,
Described testing circuit comprises transformer and rectifying and wave-filtering partial pressure unit, and this rectifying and wave-filtering partial pressure unit connects described transformer output, for carrying out rectification, filtering and point press operation;
Comparing unit comprises operational amplifier, and its negative input end connects the output of described rectifying and wave-filtering partial pressure unit, and positive input terminal is by voltage stabilizing didoe ground connection, and voltage keeps preset value;
Described driver element comprises controllable silicon and relay, and wherein, the conducting when the output of the operational amplifier connected has voltage of described controllable silicon, ends when this output does not have voltage; Described relay one end connects described controllable silicon, other end ground connection, the coils connected in series that its contact is corresponding with place electronic circuit.
5. the control system according to claim 3 or 4, is characterized in that, described coil one end connects zero line, and the other end is connected with each phase circuit by diode, and described diode cathode connects each phase circuit, negative lead circle.
6. an electric power supply control system for communication equipment, is characterized in that, comprising:
Be arranged at the control switch on three-phase line;
Connect the interchange telemetry circuit of three-phase line, it detects the magnitude of voltage of each phase circuit, the phase line conduction that ME for maintenance value is qualified, and when determining the underproof phase circuit of magnitude of voltage, controlling described control switch and disconnect this phase circuit and connect the output of this phase circuit phase circuit qualified with a magnitude of voltage;
Wherein, described control switch comprises:
Be placed in first, second and third contactor on A, B, C phase circuit respectively;
The 4th contactor between A phase circuit and B phase circuit, its two ends connect circuit between described first contactor with A phase line output respectively, circuit between described second contactor and B phase line output;
The 5th contactor between B phase circuit and C phase circuit, its two ends connect circuit between described second contactor with B phase line output respectively, circuit between described 3rd contactor and C phase line output;
When described first contactor and described second contactor are simultaneously closed, described 4th contactor is disconnected; When described second contactor and described 3rd contactor are simultaneously closed, described 5th contactor is disconnected; When described first contactor, described 3rd contactor and described 4th contactor are simultaneously closed, described 5th contactor is disconnected;
Wherein, described interchange telemetry circuit comprises:
Connect each phase circuit to detect the testing circuit of the magnitude of voltage of each phase circuit;
Be connected with described testing circuit, with the comparison circuit that the magnitude of voltage detected and preset value are compared;
The contactor connecting described comparison circuit controls drive circuit, has the coil of each phase circuit of controllable silicon, relay and connection, wherein, and the conducting when the magnitude of voltage of the comparative result instruction phase circuit of comparing unit is qualified of described controllable silicon, otherwise cut-off; Described relay one end connects described controllable silicon, other end ground connection, its contact and the coils connected in series connecting corresponding phase circuit;
Wherein, the coil of each phase circuit of described connection comprises:
Connect the first coil of zero line and all phase circuits, the second coil, tertiary coil, the 4th coil and the 5th coil, wherein the first coil, the second coil and tertiary coil are respectively used to control the closed of described first contactor, the second contactor and the 3rd contactor or disconnection;
Respectively with the first switch of described first coil, the second coil, tertiary coil, the 4th coil and the 5th coils connected in series, second switch, the 3rd switch, the 4th switch and the 5th switch, described first switch and the 4th switch be the normally opened contact of same relay and normally-closed contact each other, and described 3rd switch and the 5th switch be the normally opened contact of same relay and normally-closed contact each other;
With the 6th switch of the 4th switch in parallel, described 6th switch and second switch be the normally opened contact of same relay and normally-closed contact each other;
The 7th switch controlled with described 4th coils connected in series and by the second coil, and the 8th switch controlled with described 7th switch in parallel and by the first coil;
With the 9th switch and the tenth switch of described 5th coils connected in series, with the 11 switch of described 9th switch in parallel, and close with the twelvemo of described 11 switch in parallel, and close the 13 switch in parallel with described twelvemo, wherein, 9th switch, the tenth switch and the 13 switch control by the second coil, the first coil and the 4th coil respectively, and the 11 switch and twelvemo are closed and all controlled by tertiary coil.
7. an electric power system for communication equipment, comprises zero line, three-phase input end, output and connects the phase circuit between each phase input and output, it is characterized in that, also comprise as the control system above as described in claim 1-6 any one.
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| CN105048458A (en) * | 2015-08-20 | 2015-11-11 | 国网山东高唐县供电公司 | Automatic phase selector for residential electric meter |
| CN107128185B (en) * | 2016-02-29 | 2020-06-16 | 华为技术有限公司 | Motor drive device and electric automobile |
| CN107086554A (en) * | 2017-05-26 | 2017-08-22 | 中领世能（天津）科技有限公司 | Electric power system and its multi-stage protection device |
| CN111527006A (en) * | 2019-07-24 | 2020-08-11 | 深圳欣锐科技股份有限公司 | Three-phase charging circuit compatible with single-phase input and related equipment |
| CN113972674B (en) * | 2021-11-15 | 2023-12-22 | 国网四川省电力公司广安供电公司 | Low-voltage phase change switch with electric locking function, system and method |
| CN114336907A (en) * | 2021-12-09 | 2022-04-12 | 华人运通(江苏)技术有限公司 | Charging control method, device, equipment and medium for charging pile |
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