CN202997984U - Frequency changer KNKF energy-saving system of oil field pumping unit - Google Patents
Frequency changer KNKF energy-saving system of oil field pumping unit Download PDFInfo
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- CN202997984U CN202997984U CN 201220556484 CN201220556484U CN202997984U CN 202997984 U CN202997984 U CN 202997984U CN 201220556484 CN201220556484 CN 201220556484 CN 201220556484 U CN201220556484 U CN 201220556484U CN 202997984 U CN202997984 U CN 202997984U
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- kowtowing
- frequency converter
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Abstract
Disclosed is a frequency changer KNKF energy-saving system of an oil field pumping unit. Frequency changer direct current (DC) buses which are led from DC terminals of frequency changers of a plurality of pumping units are incorporated into a common bus through a protective fuse and a DC contactor KMZ which are in tandem connection. A KNKF controller is introduced by the system for achieving centralized control, and the KNKF controller is provided with a common bus voltage detecting end which is directly connected with the common bus. An up working dead point and a down working dead point of each pumping unit enable sensor signals to be respectively transmitted to the KNKF controller. The common bus is further connected with a regenerative braking unit, and under extreme circumstances, the regenerative braking unit works and feeds electric energy back to an alternating current (AC) supply network in which each frequency changer is inserted through an output end. Special to the places such as an oil field where more than two frequency changers are used, the KNKF controller enables the plurality of pumping units to work coordinately and to achieve energy complementation, and thus a great many electric energy is saved compared with the fact that a dynamic braking mode needs to be adopted in one frequency changer, equipment cost is saved compared with an energy feedback mode, and an ideal energy-saving effect is achieved.
Description
Technical field
The utility model relates to oil field kowtow machine and frequency converter energy conserving system, is the kowtow frequency converter KNKF energy conserving system of machine of a kind of oil field specifically.
Background technology
Along with the maturation of converter technology and the popularization of application, generally adopt speed govornor by frequency modulator on kowtowing machine in the oil field.The application of frequency converter on the machine of kowtowing improved operating efficiency, extended the useful life of the machine of kowtowing, and also has certain energy-saving effect.The machine energy-saving effect does not reach best but existing frequency conversion is kowtowed, and adopts the frequency converter of energy feedback type, and feedback device often is in running status, to the harmonic pollution increase of electrical network, the corresponding increase of line loss.When particularly same place had the frequency conversion system of many energy feedbacks, it is more outstanding that the problems referred to above can become.
Summary of the invention
Technical problem to be solved in the utility model is to address the above problem, and the frequency converter energy conserving system that provides a kind of oil field to kowtow machine adopts a kind of controller two or more kowtow motor speed and cycles to be controlled the purpose that reaches energy-conservation.
The kowtow frequency converter energy conserving system of machine of described oil field, comprise that many outputs connect the machine of the kowtowing frequency converter of motor, it is characterized in that: this system also comprises the KNKF controller, incorporate common bus into from the frequency changer direct current bus that many described dc terminals of kowtowing the machine frequency converter are drawn, common bus connects the DC bus-bar voltage test side of KNKF controller, each dynamo-electric machine of kowtowing all is provided with monitors the transducer of machine operating state of kowtowing, and sends respectively sensor signal to the KNKF controller.
The frequency changer direct current bus that described many described dc terminals of kowtowing the machine frequency converter are drawn is incorporated common bus into through protection fuse and the D.C. contactor KMZ of serial connection.
The dc terminal of each machine frequency converter of kowtowing connects the D.C. contactor KMZ control line bag of D.C. contactor KMZ and connects rear and receive and control on power supply with the fault-free output switch KF that this machine frequency converter of kowtowing carries.
The dc terminal of each machine frequency converter of kowtowing connects the protection fuse with fusing monitoring switch contacts KR; described fusing monitoring switch contacts KR is connected in series in the series loop of the D.C. contactor KMZ control line bag of this frequency converter and the fault-free output switch KF that this machine frequency converter of kowtowing carries, plays the chance fault and cuts off the effect of this machine frequency converter of kowtowing.
Each machine frequency converter of kowtowing takies one group of control channel of central control system KNKF controller, this group passage detect this machine frequency converter of kowtowing state and with user's central control system exchange message, in the KNKF controller, this group control channel analog output is connected to this machine frequency converter input end of analog signal two of kowtowing, one of the speed preset component of machine frequency converter of kowtowing as this as KNKF controller speed preset signal output part.
The given simulation by user's central control system of principal velocity of machine frequency converter of respectively kowtowing is exported to the fixed end oral instructions to each frequency converter input end of analog signal one.
Described transducer is low sensors and the high position sensor for the machine operating state of kowtowing.
The utility model local uses 2 occasions with upconverter for oil field etc. at one, multiple devices co-ordination energy complement, compare the separate unit frequency conversion and must adopt the dynamic braking mode will save much electricity, and relatively adopt the energy feedback mode will save equipment cost and energy-saving effect can be more desirable.Many frequency changer direct current bus in parallel are compared the common DC bus mode and be need not special rectifier equipment.Excise online the separate unit faulty equipment when fault occurs, improved the reliability of overall work.
Description of drawings
Fig. 1 is many machine frequency converter KNKF energy conserving system conspectuses of kowtowing,
Fig. 2 is the control principle drawing of frequency changer direct current bus parallel connection,
Fig. 3 is KNKF controller and tie conductor road schematic diagram in the utility model.
in figure: 1-regenerative braking unit, 2-KNKF controller, 3-low sensors, 4-high position sensor, 5-dynamo-electric the machine of kowtowing, 6-D.C. contactor KMZ, 7-protection fuse, 8-machine the frequency converter of kowtowing, 9-fault-free output switch KF, 10-fusing monitoring switch contacts KR, 11-D.C. contactor KMZ control line bag, 12-common bus, 13-user central control system, 14-frequency changer direct current bus, 15-Alternating Current Power Supply line, 16KNKF controller speed preset signal output part, 17-frequency converter input end of analog signal one, 18-frequency converter input end of analog signal two.
Embodiment
the present invention is further described below in conjunction with accompanying drawing: as shown in fig. 1, the kowtow frequency converter energy conserving system of machine of described oil field, comprise that many outputs connect the machine of the kowtowing frequency converter 8 of motor 5, this system also comprises KNKF controller 2, regenerative braking unit 1, incorporate common bus 12 from the frequency changer direct current bus 14 that many described dc terminals of kowtowing machine frequency converter 8 are drawn into through protection fuse 7 and the D.C. contactor KMZ6 that is connected in series, common bus 12 also connects the DC bus-bar voltage test side of regenerative braking unit 1 and KNKF controller 2, every the dynamo-electric machine 5 of kowtowing all is provided with low sensors 3 and the high position sensor 4 of monitoring electric machine operation state, and send respectively sensor signal to KNKF controller 2, KNKF controller 2 carries out corresponding Coordination Treatment according to the operating state of each dynamo-electric machine of kowtowing and the voltage of the common DC bus 12 that detects, and afterwards each change frequency converter is sent corresponding control signal, allow all machine of kowtowing co-ordinations in system, the motor that makes regenerated energy that the motor that is in generating state produces as far as possible be in motoring condition absorbs and reaches energy-conservation purpose, the described regenerative braking unit 1 Alternating Current Power Supply line 15 that automatic operation accesses electric energy feedback by output to each frequency converter under extreme case in addition.
As Fig. 2, the dc terminal of each machine frequency converter 8 of kowtowing connects the D.C. contactor KMZ control line bag 11 of D.C. contactor KMZ6 and connects rear and receive feeder ear with the fault-free output switch KF9 that this machine frequency converter 8 of kowtowing carries.The Alternating Current Power Supply line 15 that electric energy feedback is accessed to each frequency converter.
The dc terminal of each machine frequency converter 8 of kowtowing connects protection fuse 7 with fusing monitoring switch contacts KR10; described fusing monitoring switch contacts KR10 is connected in series to this frequency converter: in the series loop of the fault-free output switch KF9 that D.C. contactor KMZ control line bag 11 and this frequency converter 8 carry, play the chance fault and cut off the effect of this machine frequency converter 8 of kowtowing.
As Fig. 3, introduce a central controller KNKF2 in system, each machine frequency converter 8 of kowtowing takies one group of control channel that middle control is central controller 2, the state that this group passage detects this machine frequency converter of kowtowing whether fault, whether move, and with user's central control system 13 exchange messages, in central controller 2, an analog output of this group control channel is connected to this frequency converter input end of analog signal 2 18 as speed preset signal output part 16 simultaneously, one of the speed preset component of machine frequency converter 8 of kowtowing as this (additional given).Each frequency converter is all controlled by user's central control system 13, the KNKF controller receives the enabling signal that 13 pairs of each devices of frequency conversion of user's central control system send, and rationalization each boot sequence and then provide final enabling signal start-up time to user's central control system 13, user's central control system 13 receives that this signal in time starts this machine frequency converter of kowtowing.
Whether each machine frequency converter of kowtowing moves or how to move is to be sent by user's central control system 13, and with the described KNKF2 controller of this patent exchange correlation control signal, the given simulation by user's central control system 13 of the principal velocity of each frequency converter is exported to the fixed end oral instructions and is given each frequency conversion frequency converter input end of analog signal 1 given as the principal velocity of frequency converter.
the frequency converter of many machines of kowtowing can adopt common frequency converter, interchange input separately is attempted by on same power supply, draw frequency changer direct current bus 14 from the dc terminal of frequency converter separately, preferably be with fusing monitoring switch contacts KR10 through overprotection fuse 7(), incorporate common bus 12 after D.C. contactor KMZ6 into, frequency converter requires to have and is ready to (being fault-free) output switch KF9(passive node output type and can adds auxiliary relay separately), each frequency converter power-on time and order no requirement (NR) when powering on, the D.C. contactor KMZ6 adhesive of controlling separately after frequency converter is ready to (DC bus-bar voltage is normal) separately is incorporated into the power networks, automatically excise from network when fault is arranged and prevent that fault from further enlarging, its control principle as shown in Figure 2.In addition because other reason of operating mode and some can not make each machine of kowtowing work in the intended manner, constantly inevitablely still there is remaining energy demand to discharge at some.Increase the regenerative braking unit of suitable capacity when practical application, be used under extremity, unnecessary Way of Regenerating Energy Feedback being arrived electrical network on common DC bus.Demanded power output when it should be noted that the capacity of each frequency converter of this system's indication and corresponding motor and actual motion is suitable, if there is the difference can not be over 1 times.
As shown in Figure 1 at the end of run up and down of every the machine of kowtowing, each installs a high-order tachogenerator 4 and low level tachogenerator 3, the running status that can detect every the machine of kowtowing by the described KNKF controller 2 of this patent scheme is in motoring condition or at generating state, and can calculate the time of up-down stroke.As shown in Figure 3, the fault of every frequency converter and run signal all feed back to this controller, this controller controls for the start-stop that switching signal of every frequency converter participates in frequency converter, provides simultaneously an analog quantity control signal as the speed preset component of every frequency converter.This component superposes with the given signal of the master of frequency converter in the actual speed of frequency converter is given, speed to each machine of kowtowing is finely tuned, the final energy that makes the motor feedback that is in generating state in whole system that arrives, the motor that is in as much as possible motoring condition by dc bus absorbs, when making systematic steady state as much as possible not to the electrical network feedback energy.Due to the uncontrollability of extreme case, the voltage that this controller needs to detect constantly on common DC bus simultaneously participates in above-mentioned speed adjusting to each frequency conversion after processing judgement.
At first to guarantee just to keep between each relative running status when starting in order to make system satisfy above-mentioned working method.When also not starting in system, controller at first to detect each frequency converter whether can devote oneself to work (being ready to), then judge after the enabling signal that the central production control unit that will receive intrasystem each frequency converter or field control personnel send by central control system 13, and rationalization each boot sequence and then provide final enabling signal start-up time.Certainly sometimes on-the-spotly need the situation such as maintenance to occur to do in original control system to switch the restriction that the control of frequency converter at this moment need not to be subject to this controller.Always can be artificial being divided into two groups and some groups first starting one group or one when starting of each frequency converter to system with a plurality of machines of kowtowing, when waiting this group or platform to run to terminal point, start another or one group.Certainly should divide into groups according to the suitable principle of total energy when having the odd number platform in system or having several capacity that difference is arranged.
KNKF controller 2 detect Liang Tai and the frequency converter more than two start complete after, will monitor or judge running status separately, running status by detecting each and the voltage of dc bus carry out computing and relatively provide corresponding control signal in frequency converter speed preset amount separately, each speed of in good time fine setting to be to keep the relative motion relation between each, makes the voltage of dc bus remain on the voltage following (680V usually) of starting working in the regenerative braking unit as far as possible.Provide correct control signal and must know in advance that power, residing running status and the composite technology of each frequency conversion institute drive motors require to provide suitable amount trimmed.So system must have the default ability of parameter, stronger operational capability is sampled faster and exports responding ability.
The main interface that 2 pairs of systems of KNKF controller need and operation necessary condition are as shown in Figure 3.This KNKF controller 2 and central control system 13 or field operation box need to have mutual handshaking between (following central control system comprises field operation box), central control system 13 preferably has single-set operation or by the integrated control handoff functionality of this KNKF controller 2, not limited by the KNKF controller.Send to the KNKF controller when switching to centralized control and start the order (operating personnel send) of certain, the startup answer signal that the KNKF controller provides each according to the actual conditions of Site Detection is to middle control, and middle control receives that providing each variable frequency starting order after answer signal starts and at once start this motor.The KNKF controller provides this startup answer signal at once after the starting command of receiving First, then begins to detect this operation shape too, reaches the startup answer signal that provides next suitable opportunity.The equipment that concrete start-up course starts according to the real data of predefined individual device and the on-the-spot needs that provide judges and provides suitable startup answer signal, with assurance equipment at initial time to being conducive to the final state operation of regulating.After start, the speed preset of each frequency conversion is given by middle control as required, can provide also by the main given way in Fig. 3 and can be provided by other modes, the KNKF controller detects each running status and the voltage in public direct-current loop constantly, through calculation process provide each speed fine adjustment signal given to addition speed in, running status to each is finely tuned, finally reach a more satisfactory stable state, need not be worked in the regenerative braking unit.KNKF controller 2 is made modular structure, carries out expansion interface and configuration according to the equipment number of units of each system.Parameter setting or programming that controller adopts programmable way to be correlated with according to different equipment.
Claims (7)
1. the oil field frequency converter KNKF energy conserving system of machine of kowtowing, comprise that many outputs connect the machine of the kowtowing frequency converter (8) of motor (5), it is characterized in that: this system also comprises KNKF controller (2), incorporate common bus (12) into from the frequency changer direct current bus (14) that many described dc terminals of kowtowing machine frequency converter (8) are drawn, common bus (12) connects the DC bus-bar voltage test side of KNKF controller (2), each dynamo-electric machine (5) of kowtowing all is provided with the transducer of monitoring the machine operating state of kowtowing, and send respectively sensor signal to KNKF controller (2).
2. the oil field according to claim 1 frequency converter KNKF energy conserving system of machine of kowtowing, it is characterized in that: the frequency changer direct current bus (14) that described many described dc terminals of kowtowing machine frequency converter (8) are drawn is through protection fuse (7) and the D.C. contactor KMZ(6 of serial connection) incorporate common bus (12) into.
3. the oil field according to claim 2 frequency converter KNKF energy conserving system of machine of kowtowing, it is characterized in that: the dc terminal of each machine frequency converter (8) of kowtowing meets D.C. contactor KMZ(6) the fault-free output switch KF(9 that carries of D.C. contactor KMZ control line bag (11) and this machine frequency converter (8) of kowtowing) connect after and receive and control on power supply.
4. the oil field according to claim 3 frequency converter KNKF energy conserving system of machine of kowtowing; it is characterized in that: the dc terminal of each machine frequency converter (8) of kowtowing connects protection fuse (7) with fusing monitoring switch contacts KR(10); described fusing monitoring switch contacts KR(10) be connected in series to the D.C. contactor KMZ control line bag (11) of this frequency converter and the fault-free output switch KF(9 that this machine frequency converter (8) of kowtowing carries) series loop in, play and meet fault and cut off the effect of these machine frequency converter (8) of kowtowing.
5. the oil field according to claim 1 frequency converter KNKF energy conserving system of machine of kowtowing, it is characterized in that: each machine frequency converter (8) of kowtowing takies one group of control channel of central control system KNKF controller (2), this group passage detect this machine frequency converter of kowtowing state and with user's central control system (13) exchange message, in KNKF controller (2), an analog output of this group control channel is connected to this machine frequency converter input end of analog signal two (18) of kowtowing as KNKF controller speed preset signal output part (16), one of the speed preset component of machine frequency converter (8) of kowtowing as this.
6. the oil field according to claim 5 frequency converter KNKF energy conserving system of machine of kowtowing, be characterized in: the given simulation by user's central control system (13) of the principal velocity of the machine frequency converter (8) of respectively kowtowing is exported to the fixed end oral instructions to each frequency converter input end of analog signal one (17).
7. the oil field according to claim 1 frequency converter KNKF energy conserving system of machine of kowtowing, be characterized in: described transducer is for the low sensors (3) of the machine operating state of kowtowing and high position sensor (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220556484 CN202997984U (en) | 2012-10-29 | 2012-10-29 | Frequency changer KNKF energy-saving system of oil field pumping unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220556484 CN202997984U (en) | 2012-10-29 | 2012-10-29 | Frequency changer KNKF energy-saving system of oil field pumping unit |
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| Publication Number | Publication Date |
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| CN202997984U true CN202997984U (en) | 2013-06-12 |
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| CN 201220556484 Expired - Fee Related CN202997984U (en) | 2012-10-29 | 2012-10-29 | Frequency changer KNKF energy-saving system of oil field pumping unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108845260A (en) * | 2018-08-31 | 2018-11-20 | 重庆顺心仪器设备有限公司 | A kind of motor bracket loading test platform based on frequency conversion control technique |
-
2012
- 2012-10-29 CN CN 201220556484 patent/CN202997984U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108845260A (en) * | 2018-08-31 | 2018-11-20 | 重庆顺心仪器设备有限公司 | A kind of motor bracket loading test platform based on frequency conversion control technique |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130612 Termination date: 20151029 |
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| EXPY | Termination of patent right or utility model |