Summary of the invention
The purpose of this invention is to provide that the timely failure rate of a kind of energy is low, the supervising device and the method for work thereof of the last transfer wind cooling system that can monitor in mode intuitively.
For achieving the above object, the supervising device of main transfer wind cooling system of the present invention, the Drive and Control Circuit that have Programmable Logic Controller, links to each other with the control signal output ends of Programmable Logic Controller; Its architectural feature is: Programmable Logic Controller has digital signal end; Programmable Logic Controller is controlled the input amount of each oil pump and blower fan in the refrigeratory of main transfer wind cooling system by Drive and Control Circuit automatically according to the oily temperature digital signal and the load current digital signal of the main-transformer at this main transfer wind cooling system place of its digital signal end reception; The fault-signal input end of Programmable Logic Controller is connected with the CPLD failure detector circuit, detecting phase shortage, overload or the short trouble that each oil pump and blower fan may exist in the refrigeratory, and will have the oil pump and the blower fan excision of described fault by Drive and Control Circuit.
Further, the present invention also has and the two-way touch-screen that is electrically connected of Programmable Logic Controller, so that the various parameters in the Programmable Logic Controller are artificially set, also can write down and show failure message, main-transformer oil temperature and load current that refrigeratory exists simultaneously.
In the technique scheme, the CPLD failure detector circuit comprises CPLD lack detection circuit, CPLD overload detection circuit and CPLD short-circuit detecting circuit; CPLD lack detection circuit, CPLD overload detection circuit and CPLD short-circuit detecting circuit link to each other with default phase signal input end, overload signal input end and the short-circuit signal input end of Programmable Logic Controller respectively.
Above-mentioned CPLD lack detection circuit comprises accurate transformer circuit, rectification circuit, comparator circuit, CPLD and the driving circuit of serial connection successively; Accurate transformer circuit can according to separately each of each oil pump in the refrigeratory and blower fan mutually working current generate the corresponding induction current of respectively organizing, described induction current is exported corresponding status signal behind rectification circuit and comparator circuit, CPLD can judge according to described status signal whether oil pump and the blower fan in the refrigeratory of main transfer wind cooling system exists open-phase fault, and the described open-phase fault signal that will judge is delivered to the open-phase fault signal input part of Programmable Logic Controller behind driving circuit.
Further, the circuit structure of described CPLD overload detection circuit and CPLD short-circuit detecting circuit is identical with the CPLD lack detection circuit.
Further, Programmable Logic Controller of the present invention is connected with the running status testing circuit; Programmable Logic Controller detects power supply status, the main-transformer cold oil recurrent state of main transfer wind cooling system by the running status testing circuit.
Further, the indicator signal output terminal of Programmable Logic Controller of the present invention is connected with indicator light circuit.
Further, the manual control input end of Programmable Logic Controller of the present invention is connected with manual control circuit, manual control circuit comprise the selector switch of a distant place/on the spot, automatic/hand selector switch and with refrigeratory in each oil pump and the corresponding gauge tap of blower fan.
Further, the communication ends of Programmable Logic Controller of the present invention also is electrically connected with the remote monitoring center is two-way by communication module; The digital signal end of described Programmable Logic Controller is the communication ends of Programmable Logic Controller; Programmable Logic Controller is delivered to the oil temperature signal and the load current value signal of control signal and described main-transformer in the remote monitoring center by communication module communication ends.
The method of work of the supervising device of main transfer wind cooling system of the present invention comprises:
The communication ends of Programmable Logic Controller receives oily temperature digital signal and the load current digital signal from the main-transformer at this main transfer wind cooling system place at remote monitoring center;
Programmable Logic Controller is controlled the input amount of each oil pump and blower fan in the refrigeratory of main transfer wind cooling system by Drive and Control Circuit automatically according to the gentle load current of described main-transformer oil;
Programmable Logic Controller detects phase shortage, overload or the short trouble that each oil pump and blower fan may exist in the refrigeratory respectively by the CPLD lack detection circuit in the CPLD failure detector circuit, CPLD overload detection circuit and CPLD short-circuit detecting circuit, and will have the oil pump and the blower fan excision of described fault by Drive and Control Circuit.
Wherein, can artificially set the warm higher limit of the parameter in the Programmable Logic Controller such as main-transformer oil, oily temperature lower limit, oily temperature return difference, load current higher limit, load current lower limit, load current return difference and rotation time with the two-way touch-screen that is electrically connected of Programmable Logic Controller, and can write down, show the oil pump in the refrigeratory of main transfer wind cooling system and running state information and failure message and the described main-transformer oil temperature and the load current value of blower fan.
Wherein, CPLD lack detection circuit, CPLD overload detection circuit and CPLD short-circuit detecting circuit carry out fault detect by the faradic size that detects accurate transformer circuit.
Wherein, the manual control input end of Programmable Logic Controller is connected with manual control circuit, manual control circuit comprise the selector switch of a distant place/on the spot, automatic/hand selector switch and with refrigeratory in each oil pump and the corresponding gauge tap of blower fan; Manual control circuit can be selected control to the operation of the refrigeratory of the control mode of Programmable Logic Controller and main transfer wind cooling system.
Wherein, Programmable Logic Controller is sent to the remote monitoring center with the running state information and the failure message of each oil pump and blower fan in the refrigeratory by communication module.
Technique scheme of the present invention has following good effect compared to existing technology:
(1) supervising device of main transfer wind cooling system of the present invention adopts the CPLD failure detector circuit, judge according to the faradic size that accurate transformer circuit generates whether institute's survey oil pump or blower fan exist phase shortage, overload or short trouble, solved the high problem of failure rate that adopts the traditional detection components and parts and bring.(2) but the touch-screen that the present invention adopts can artificially set and record the parameter in the Programmable Logic Controller etc., the running state information and the failure message that show relevant institute survey oil pump or blower fan, make to monitor on the spot to become very directly perceived, improved the practicality and the ease for use of main transfer wind cooling system of the present invention.(3) communication ends of the Programmable Logic Controller among the present invention is electrically connected with the remote monitoring center is two-way by communication module, thereby making the oily temperature and the load current signal of the main-transformer of Programmable Logic Controller reception is digital signal, has further improved monitoring precision and reliability.Simultaneously the remote monitoring center can also monitor the work state information and the failure message of each oil pump and blower fan in the refrigeratory intuitively, and can carry out far-end control to each oil pump and blower fan in the refrigeratory, has realized remote monitoring and combining of monitoring on the spot.
Embodiment
Embodiment 1
See Fig. 1, the supervising device of the main transfer wind cooling system of present embodiment has Programmable Logic Controller 1, indicator light circuit 2, manual control circuit 3, touch-screen 4, running status testing circuit 6, CPLD failure detector circuit 7, Drive and Control Circuit 8.The communication ends of Programmable Logic Controller 1 is through communication module 50 and remote monitoring center 51 two-way electrical connections.
PLC Programmable Logic Controller 1 adopts the FX2N-80MR-001 of Mitsubishi, and is connected with the FX2N-16EX of Mitsubishi at the I/O of FX2N-80MR-001 expansion mouth.The communication ends of FX2N-16EX is connected with communication module 50, and communication module 50 adopts the FX-485PC-IF of Mitsubishi.
The indicator signal output terminal of Programmable Logic Controller 1 is connected with and can indicates the running status of this main transfer wind cooling system or the indicator light circuit 2 of guilty culprit to the user.Indicator light circuit 2 comprises: refrigeratory fan failure signal lamp, refrigeratory fan run signal lamp, refrigeratory oil pump emergency light, refrigeratory oil pump run signal lamp, power failure lamp, power monitoring pilot lamp, the warm high pilot lamp of oil, the big pilot lamp of electric current, short trouble pilot lamp, contactor malfunction indicator lamp, automatic pilot lamp and manual pilot lamp etc.Above-mentioned signal lamp or pilot lamp are serially connected in the corresponding output terminal of Programmable Logic Controller 1.
The manual control input end of Programmable Logic Controller 1 is connected with manual control circuit 3, manual control circuit 3 comprise the selector switch of a distant place/on the spot, automatic/hand selector switch and with the refrigeratory 9 corresponding gauge tap of main transfer wind cooling system; Manual control circuit 3 can be selected control to the operation of the refrigeratory 9 of the control mode of Programmable Logic Controller 1 and main transfer wind cooling system.
Touch-screen 4 and Programmable Logic Controller 1 two-way the electrical connection.Can artificially set and can write down, show the oil pump in the refrigeratory 9 of main transfer wind cooling system and failure message and the main-transformer oil temperature and the load current of blower fan to the warm higher limit of the parameter in the Programmable Logic Controller 1 such as main-transformer oil, oily temperature lower limit, oily temperature return difference, load current higher limit, load current lower limit, load current return difference and rotation time by touch-screen 4 users.
Programmable Logic Controller 1 also is connected with running status testing circuit 6; Running status testing circuit 6 comprises the oil flow relay that is used to detect the cold oil recurrent state, be used to detect the AC relay of power supply status and be arranged on that the oil temperature of Programmable Logic Controller 1 is high, the oil temperature is low and the contact of the high input end of load current etc.Programmable Logic Controller 1 detects power supply status, main-transformer cold oil recurrent state, oil temperature height state and the load current size state of main transfer wind cooling system by running status testing circuit 6 and described status information is outwards shown by indicator light circuit 2 and touch-screen 4.
Drive and Control Circuit 8 links to each other with the control signal output ends of Programmable Logic Controller 1, and what Drive and Control Circuit 8 comprised the refrigeratory control output end that is serially connected in Programmable Logic Controller 1 is used to the A.C. contactor contact controlling the A.C. contactor control coil of refrigeratory 9 and be arranged on refrigeratory 9 power ends etc.
See Fig. 2, the fault-signal input end of Programmable Logic Controller 1 is connected with CPLD failure detector circuit 7, and CPLD failure detector circuit 7 comprises CPLD lack detection circuit 71, CPLD overload detection circuit 72 and CPLD short-circuit detecting circuit 73.
See Fig. 3 and Fig. 4, CPLD lack detection circuit 71 comprises accurate transformer circuit 711, rectification circuit 712, comparator circuit 713, CPLD714 and the driving circuit 715 of serial connection successively.
In the present embodiment, it is the CPLD of EPM7128SL8-15 that CPLD714 adopts model.Also can adopt other ASIC special ICs, comprise CPLD CPLD and FPGA field programmable gate array etc.
CPLD overload detection circuit 72 and CPLD short-circuit detecting circuit 73 adopts the circuit structure identical with CPLD lack detection circuit 71.
Programmable Logic Controller 1 is by the running status and the main-transformer cold oil recurrent state of each oil pump and blower fan in the refrigeratory 9 of running status testing circuit 6 detection main transfer wind cooling systems.
The digital signal end that remote monitoring center 51 is sent into Programmable Logic Controller 1 with the oily temperature digital signal and the load current digital signal of the main-transformer at this main transfer wind cooling system place by communication module 50 also is a communication ends.
The refrigeratory 9 of the main transfer wind cooling system of present embodiment has 4, and each refrigeratory has 1 table oil pump and 2 typhoon machines.So refrigeratory 9 has 12 3 cross streams motors, totally 36 power inleting terminals.
During the work of the supervising device of described main transfer wind cooling system, Programmable Logic Controller 1 judges whether the working power of main transfer wind cooling system is normal, if normal, the power supply of then devoting oneself to work; If undesired, then drop into standby power supply and point out the working power failure message.The communication ends of Programmable Logic Controller 1 receives oily temperature digital signal and the load current digital signal from the main-transformer at this main transfer wind cooling system place at remote monitoring center 51; Programmable Logic Controller 1 is controlled by the input amount of each oil pump and blower fan in the refrigeratory 9 of 8 pairs of main transfer wind cooling systems of Drive and Control Circuit automatically according to the gentle load current of described main-transformer oil.Programmable Logic Controller 1 detects phase shortage, overload or the short trouble that each oil pump and blower fan may exist in the refrigeratory 9 respectively by the CPLD lack detection circuit 71 in the CPLD failure detector circuit 7, CPLD overload detection circuit 72 and CPLD short-circuit detecting circuit 73, and will have the oil pump and the blower fan excision of described fault by Drive and Control Circuit 8.Programmable Logic Controller 1 is sent to remote monitoring center 51 with the running state information and the failure message of each oil pump and blower fan in the refrigeratory 9 by communication module 50 simultaneously.
Wherein, when Programmable Logic Controller 1 automatically in the control refrigeratory 9 during the input amount of each oil pump and blower fan, if Programmable Logic Controller 1 records the oil temperature of main-transformer greater than 45 ℃ of preset lower limit, then Programmable Logic Controller 1 is that 3 refrigeratorys put into operation with the work refrigeratory in the refrigeratory 9 of main transfer wind cooling system; If the oil temperature that Programmable Logic Controller 1 records main-transformer greater than 65 ℃ of capping values or the load current that records main-transformer greater than the capping value, then Programmable Logic Controller 1 is that the 4th refrigeratory puts into operation with the standby refrigeratory in the refrigeratory 9 of main transfer wind cooling system, and the high pilot lamp of oily temperature in the while indicator light circuit 2 is bright or the big pilot lamp of electric current is bright; The oil temperature of main-transformer to be measured also is 65 ℃ of described oil temperature capping values and difference 1O ℃ of oily temperature return difference less than 55 ℃; Or the load current that records main-transformer is during less than the difference of described load current capping value and load current return difference, and Programmable Logic Controller 1 is with the standby refrigeratory excision in the refrigeratory 9 of main transfer wind cooling system.
When reach default rotation time the working time of the refrigeratory of current operation in the refrigeratory 9 of main transfer wind cooling system, the refrigeratory excision that Programmable Logic Controller 1 is the longest with current working time in the refrigeratory 9 of main transfer wind cooling system is that the refrigeratory of the 4th energy operate as normal puts into operation simultaneously with the standby refrigeratory in the refrigeratory 9 of main transfer wind cooling system.
When Programmable Logic Controller 1 excised the power supply of the refrigeratory that has described fault by Drive and Control Circuit 8, the standby refrigeratory of the Programmable Logic Controller 1 control i.e. refrigeratory of the 4th energy operate as normal put into operation.Simultaneously, Programmable Logic Controller 1 breaks down by indicator light circuit 2 promptings, and described failure message is delivered to touch-screen 4 and remote monitoring center 51.Described failure message comprises the numbering and the fault type thereof of the motor of the oil pump that breaks down or blower fan, so that the maintainer in time finds this fault motor and in time keeps in repair accordingly.
The user is undertaken by selector switch of the distant place in the manual control circuit 3/on the spot and automatic/hand selector switch that a distant place is controlled automatically, manually control or the selection of automatic control mode on the spot on the spot.When selecting distant place automatic control mode, by remote monitoring center 51 control signal is sent into Programmable Logic Controller 1 by communication module 50, Programmable Logic Controller 1 is according to described operation from each oil pump and blower fan in the control signal control refrigeratory 9 at remote monitoring center 51; When selecting on the spot manual control mode, the user can be by the operation of each oil pump and blower fan in the control of the refrigeratory gauge tap in the manual control circuit 3 refrigeratory 9; When selecting on the spot automatic control mode, Programmable Logic Controller 1 is controlled the operation in the refrigeratory 9 of main transfer wind cooling system automatically according to the gentle load current of main-transformer oil at this main transfer wind cooling system place.
The user can be provided with the parameter of the warm higher limit of main-transformer oil in the Programmable Logic Controller 1, oily temperature lower limit, oily temperature return difference, load current higher limit, load current lower limit, load current return difference and rotation time by touch-screen 4; Programmable Logic Controller 1 is carried out control automatically by the parameter of described setting simultaneously.
Still see Fig. 4, in CPLD lack detection circuit 71, corresponding with described 36 power inleting terminals of refrigeratory 9, accurate transformer circuit 711 comprises 36 current transformers, and rectification circuit 712 comprises that 36 rectifiers, comparator circuit 713 comprise 36 comparers.Wherein, each power inleting terminal mutually that accurate transformer circuit 711 is arranged on each oil pump and blower fan (also being 12 3 cross streams motors in the described refrigeratory 9) in the refrigeratory 9, and the corresponding 12 groups of induction currents of 12 3 cross streams motors in generation and the described refrigeratory 9, every group of induction current comprises 3 phases; Described 12 groups of induction currents are the corresponding 12 groups of status signals of output behind each rectifier in rectification circuit 712 and each comparer in the comparator circuit 713 respectively, and every group of state electric signal comprises 3 phases.CPLD714 can judge according to described status signal whether oil pump and the blower fan in the refrigeratory 9 of main transfer wind cooling system exists open-phase fault.Wherein, be high level state mutually as if 3 in one group of status signal, then this group pairing oil pump of status signal or blower fan are normal; Otherwise, be low level state as if having a phase or two-phase in one group of status signal, then should group pairing oil pump of status signal or blower fan phase shortage.The described open-phase fault signal that to judge of CPLD714 is delivered to the open-phase fault signal input part of Programmable Logic Controller 1 behind driving circuit 715 then.Wherein, driving circuit 715 comprises No. 12 driving circuits, each oil pump and blower fan in the corresponding described refrigeratory 9 of described No. 12 driving circuits difference.Described No. 12 driving circuits comprise triode and photoelectrical coupler.The output terminal of described No. 12 driving circuits also is that the output terminal of photoelectrical coupler links to each other with 12 interfaces of the open-phase fault signal input part of Programmable Logic Controller 1.At last, Programmable Logic Controller 1 breaks down by indicator light circuit 2 promptings, and described failure message is delivered to touch-screen 4 and remote monitoring center 51.
CPLD overload detection circuit 72 and CPLD short-circuit detecting circuit 73 adopts the circuit structure identical with CPLD lack detection circuit 71.
When CPLD overload detection circuit 72 is carried out the overload fault detection, accurate transformer circuit can according to each oil pump in the refrigeratory 9 and blower fan each mutually working current generate corresponding induction current, described induction current is exported behind rectification circuit and comparator circuit respectively and is respectively organized status signal accordingly, and every group of state electric signal comprises 3 phases.Wherein, the comparison datum of the comparator circuit setting of CPLD overload detection circuit 72 is 1.5 times of comparator circuit in the CPLD overload detection circuit 71, to satisfy the demand that detects overload.CPLD can judge that according to described status signal there are the fault of overload in concrete which oil pump in the refrigeratory 9 of main transfer wind cooling system or blower fan.Wherein, be high level state mutually, then should organize pairing oil pump of status signal or blower fan overload as if 3 in one group of status signal; Otherwise, be low level state mutually as if 3 in one group of status signal, then this group pairing oil pump of status signal or blower fan are normal.The described overload fault signal that to judge of CPLD is delivered to the overload fault signal input part of Programmable Logic Controller 1 behind driving circuit then.Wherein, each oil pump and the blower fan in the corresponding described refrigeratory 9 of each road driver difference in the driving circuit.Described each road driver comprises triode and photoelectrical coupler.The output terminal that described each road output end of driver also is a photoelectrical coupler links to each other with 12 interfaces of the overload fault signal input part of Programmable Logic Controller 1.At last, Programmable Logic Controller 1 breaks down by indicator light circuit 2 promptings, and described failure message is delivered to touch-screen 4 and remote monitoring center 51.
When CPLD short-circuit detecting circuit 73 carries out the short trouble detection, accurate transformer circuit can according to each oil pump in the refrigeratory 9 and blower fan each mutually working current generate corresponding induction current, described induction current is exported behind rectification circuit and comparator circuit respectively and is respectively organized status signal accordingly, and every group of state electric signal comprises 3 phases.Wherein, the set comparison datum of the comparator circuit in the CPLD short-circuit detecting circuit 72 is 3 times of comparator circuit in the CPLD short-circuit detecting circuit 71, to satisfy the demand of short-circuit detecting.The status signal that CPLD exports after according to described comparator circuit can judge there is short trouble in concrete which table oil pump or fan in the refrigeratory 9 of main transfer wind cooling system.Wherein, be high level state as if having a phase or two-phase in one group of status signal, all the other two-phases or are low level state mutually, then should organize pairing oil pump of status signal or blower fan short circuit; Otherwise, be low level state mutually as if 3 in one group of status signal, then this group pairing oil pump of status signal or blower fan are normal.The described short trouble signal that to judge of CPLD is delivered to the short trouble signal input part of Programmable Logic Controller 1 behind driving circuit then.Wherein, each oil pump and the blower fan in the corresponding described refrigeratory 9 of each road driver difference in the driving circuit.Described each road driver comprises triode and photoelectrical coupler.The output terminal that described each road output end of driver also is a photoelectrical coupler links to each other with 12 interfaces of the short trouble signal input part of Programmable Logic Controller 1.At last, Programmable Logic Controller 1 breaks down by indicator light circuit 2 promptings, and described failure message is delivered to touch-screen 4 and remote monitoring center 51.
In the present embodiment, the oil temperature signal and the load current value signal of the main-transformer at this main transfer wind cooling system place are sent into Programmable Logic Controller 1 by communication module 50.In other embodiments, also can adopt alternate manner.
Embodiment 2
The difference of present embodiment and embodiment 1 is: CPLD failure detector circuit 7 comprises CPLD lack detection circuit 71, traditional overload detection circuit and traditional short-circuit detecting circuit.The tradition overload detection circuit adopts each electrothermal relay of mains terminals mutually be arranged on each oil pump and blower fan in the refrigeratory 9, and the contact of described each electrothermal relay is arranged on the overload fault signal input part of Programmable Logic Controller 1; The tradition short-circuit detecting circuit adopts the automatic air-break switch that is arranged on refrigeratory 9 each phase power inleting terminal.
Obviously, the above embodiment of the present invention only is for example of the present invention clearly is described, and is not to be qualification to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give exhaustive to all embodiments.And these belong to conspicuous variation or the change that spirit of the present invention extended out and still are among protection scope of the present invention.