CN201937276U - Reactive compensating capacitor control circuit of beam pumping unit - Google Patents
Reactive compensating capacitor control circuit of beam pumping unit Download PDFInfo
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- CN201937276U CN201937276U CN2011200398595U CN201120039859U CN201937276U CN 201937276 U CN201937276 U CN 201937276U CN 2011200398595 U CN2011200398595 U CN 2011200398595U CN 201120039859 U CN201120039859 U CN 201120039859U CN 201937276 U CN201937276 U CN 201937276U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
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- Supply And Distribution Of Alternating Current (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
The utility model relates to a reactive compensating capacitor control circuit of a beam pumping unit, which comprises a vacuum circuit breaker, an alternative current contactor, a PLC (programmable logic controller) control module, a transformer and three reactors. Three-phase alternative current passes through the vacuum circuit breaker to enter a three-phase electric machine of the beam pumping unit. Three reactive compensating capacitors are connected with a three-phase alternative current circuit through three normally open main contacts of the alternative current contactor. Any two phases of the three-phase alternative current circuit are connected with the two ends of a primary coil of the transformer respectively. Outputting normally open contacts of the PLC control module are first connected with the coil of the alternative current contactor in series, and then connected with the two ends of a first secondary coil in parallel. Auxiliary contacts of the vacuum circuit breaker are first connected with an inputting coil of the PLC control module in series, then connected with the two ends of a second secondary coil of the transformer in parallel, and the three reactors are connected with the three-phase alternative current circuit in series respectively. The reactive compensating capacitor control circuit of the beam pumping unit has simple structure and good controlling effects.
Description
(1), technical field: the utility model relates to a kind of capacitor control circuit, particularly a kind of oil pumper reactive-load compensation capacitor control circuit.
(2), background technology: the system power factor improves in order to reduce the electric network reactive-load loss in oilfield enterprise, adopts power capacitor to carry out reactive power compensation usually.Adopt the capacitance compensation mode to have three kinds usually: 1, centralized compensation 2, dispersion compensation 3, indivedual compensation.Wherein indivedual compensation ways are good because of compensation effect, compensates the most thoroughly, are widely used in production is recovered the oil in the oil field.Oil pumper is installed reactive-load compensation capacitor and is just belonged to indivedual compensation ways, its concrete mode of connection is to install in the source box of oil pumper and the direct capacitor in parallel of motor, come the reactive power of compensated motor by capacitor, thereby reduce the circuit reactive loss, improve the system power factor, reach energy saving purposes.
In production practices, find: when horse head is got rid of in the oil pumper operation, the start and stop oil pumper can cause capacitor to blast and casualty accident continually, not only make the damage rate height, life-span of capacitor short, change frequent, cost and have high input, but also there is potential safety hazard, cause the reactive-load compensation capacitor overwhelming majority that is contained in the oil pumper source box to be removed or stop using, can't realize the reactive power compensation of pumping-unit motor.
(3), utility model content:
The technical problems to be solved in the utility model is: at the prior art deficiency, provide a kind of simple in structure, effective oil pumper reactive-load compensation capacitor control circuit of control.
The technical solution of the utility model:
A kind of oil pumper reactive-load compensation capacitor control circuit, contain vacuum circuit-breaker and A.C. contactor, three-phase alternating current is through entering the input of the three phase electric machine of oil pumper behind three main contactss of vacuum circuit-breaker, three reactive-load compensation capacitors are joined together to form a triangle connector in the triangle mode, three summits of triangle connector, three by A.C. contactor are respectively often opened main contacts and are connected with three-phase AC line, this oil pumper reactive-load compensation capacitor control circuit also contains the PLC control module, transformer and three reactors, three instrument transformers that are arranged on the three-phase AC line are connected with three instrument transformer inputs of PLC control module respectively, the two-phase circuit of appointing in the three-phase AC line is connected with the two ends of the former end-coil of transformer respectively, the output normally opened contact of PLC control module and the two ends that are attempted by the first secondary end-coil of transformer after the coil of A.C. contactor is connected, the auxiliary contact of vacuum circuit-breaker and the two ends that are attempted by the second secondary end-coil of transformer after the input coil of PLC control module is connected, three reactors are serially connected on the three-phase AC line respectively.
Three-phase alternating current passes through knife switch successively; three fuses; three main contactss of vacuum circuit-breaker; the motor comprehensive protection controller; enter the input of three phase electric machine behind three reactors; three instrument transformers are arranged on the three-phase AC line between motor comprehensive protection controller and three reactors; the tie point that three of A.C. contactor often leave main contacts and three-phase AC line is between motor comprehensive protection controller and three instrument transformers, and the tie point at the two ends of the former end-coil of appointing two-phase circuit and transformer in the three-phase AC line is also between motor comprehensive protection controller and three instrument transformers.
The model of motor comprehensive protection controller is JDK8S.
Be attempted by the two ends of the first secondary end-coil of transformer after often the driving auxiliary contact and run indicator is connected of A.C. contactor, power supply indicator is attempted by the two ends of the second secondary end-coil of transformer, the warning output indicator light taking alarm of PLC control module.
The model of PLC control module is LGK7M-DR20U/DC, and A.C. contactor is the vacuum A.C. contactor.
A kind of oil pumper reactive-load compensation capacitor control circuit, contain vacuum circuit-breaker and A.C. contactor, three-phase alternating current is through entering the input of the three phase electric machine of oil pumper behind three main contactss of vacuum circuit-breaker, three reactive-load compensation capacitors are joined together to form a triangle connector in the triangle mode, three summits of triangle connector, three by A.C. contactor are respectively often opened main contacts and are connected with three-phase AC line, this oil pumper reactive-load compensation capacitor control circuit also contains PLC control module and three reactors, three instrument transformers that are arranged on the three-phase AC line are connected with three instrument transformer inputs of PLC control module respectively, two-phase power taking circuit is connected to appointing on the two-phase circuit in the three-phase AC line, the output normally opened contact of PLC control module be attempted by between the two-phase power taking circuit after the coil of A.C. contactor is connected, the auxiliary contact of vacuum circuit-breaker with also be attempted by between the two-phase power taking circuit after the input coil of PLC control module is connected, three reactors are serially connected on the three-phase AC line respectively.
Three-phase alternating current passes through knife switch successively; three fuses; three main contactss of vacuum circuit-breaker; the motor comprehensive protection controller; enter the input of three phase electric machine behind three reactors; three instrument transformers are arranged on the three-phase AC line between motor comprehensive protection controller and three reactors; the tie point that three of A.C. contactor often leave main contacts and three-phase AC line is between motor comprehensive protection controller and three instrument transformers, and the tie point of appointing the two-phase circuit in two-phase power taking circuit and the three-phase AC line is also between motor comprehensive protection controller and three instrument transformers.
The model of motor comprehensive protection controller is JDK8S.
Be attempted by between the two-phase power taking circuit after often the driving auxiliary contact and run indicator is connected of A.C. contactor, power supply indicator is attempted by between the two-phase power taking circuit, the warning output indicator light taking alarm of PLC control module.
The model of PLC control module is LGK7M-DR20U/DC.
The beneficial effects of the utility model:
1. the utility model adopts the action of PLC control module control A.C. contactor, thereby controls being switched on or switched off of reactive-load compensation capacitor; When after the vacuum circuit breaker disconnects, opening again, after PLC control module time-delay a period of time (such as 10 minutes) reactive-load compensation capacitor is connected, so that the abundant self discharge of reactive-load compensation capacitor (be more than 3 minutes discharge time usually), eliminate the interpolar residual charge, prevent reactive-load compensation capacitor loaded-up again, avoided the damage that it is caused; When the vacuum circuit breaker disconnected, reactive-load compensation capacitor disconnected immediately, had prevented that the rotation of balance of well pumping unit piece inertia from driving the injury that the motor self power generation causes reactive-load compensation capacitor.The utility model is not only fine to have solved the injury that the frequent start-stop oil pumper causes reactive-load compensation capacitor, and eliminated the reactive-load compensation capacitor blast unsafe factor of hurting sb.'s feelings, prolonged simultaneously the useful life of capacitor greatly, save production cost, really reached energy saving purposes.Oil pumper reactive-load compensation capacitor control circuit of the present utility model is simple and clear, easy for installation, with low cost, effect is obvious, safe and reliable.
2. PLC control module of the present utility model also can be monitored three-phase alternating current in real time by connected instrument transformer, and it possesses following advantage:
When the heavy current impact electrical network, start defencive function, often open main contacts for three that disconnect the preceding A.C. contactor of reactive-load compensation capacitor, the impact when making reactive-load compensation capacitor avoid the electrical network instability;
When fault such as phase shortage occurring when electrical network, output alarm signal, on-call maintenance is carried out in prompting.
3. the utility model was provided with three reactors before reactive-load compensation capacitor, can alleviate the impact of line voltage shakiness like this, filtering clutter, harmonic wave, heavy current, the voltage of moment when avoiding when the enforcement motor is counter under the oil pumper generates electricity to the impact of reactive-load compensation capacitor and A.C. contactor adhesive.
(4), description of drawings:
Fig. 1 is one of principle schematic of oil pumper reactive-load compensation capacitor control circuit;
Fig. 2 be oil pumper reactive-load compensation capacitor control circuit principle schematic two.
(5), embodiment:
Embodiment one: referring to Fig. 1, among the figure, oil pumper reactive-load compensation capacitor control circuit contains vacuum circuit-breaker QF1 and A.C. contactor QF2, enter the input of the three phase electric machine 3M of oil pumper behind three main contacts QF1-K1 of three-phase alternating current through vacuum circuit-breaker QF1, three reactive-load compensation capacitor C1, C2, C3 is joined together to form a triangle connector in the triangle mode, main contacts QF2-K1 and three-phase AC line A are often opened by three of A.C. contactor QF2 respectively in three summits of triangle connector, B, C connects, this oil pumper reactive-load compensation capacitor control circuit also contains PLC control module AM, transformer KB and three reactor XL1, XL2, XL3, be arranged on three-phase AC line A, B, three instrument transformer L1 on the C, L2, L3 respectively with three instrument transformer input A1 of PLC control module AM, B1, C1 connects, three-phase AC line A, B, two-phase circuit A among the C, B is connected with the two ends of the former end-coil of transformer KB respectively, the output normally opened contact of PLC control module AM and the two ends that are attempted by the first secondary end-coil of transformer KB after the coil QF2-L of A.C. contactor QF2 connects, the auxiliary contact QF1-K2 of vacuum circuit-breaker QF1 and the two ends that are attempted by the second secondary end-coil of transformer KB after the input coil of PLC control module AM is connected, three reactor XL1, XL2, XL3 is serially connected in three-phase AC line A respectively, B, on the C.
Three-phase alternating current is successively by knife switch DK; three fuse FU1; FU2; FU3; three main contacts QF1-K1 of vacuum circuit-breaker QF1; motor comprehensive protection controller BD; three reactor XL1; XL2; enter the input of three phase electric machine 3M behind the XL3; three instrument transformer L1; L2; L3 is arranged on motor comprehensive protection controller BD and three reactor XL1; XL2; three-phase AC line A between the XL3; B; on the C; often open main contacts QF2-K1 and three-phase AC line A for three of A.C. contactor QF2; B; the tie point of C is positioned at motor comprehensive protection controller BD and three instrument transformer L1; L2; between the L3, three-phase AC line A; B; two-phase circuit A among the C; the tie point at the two ends of the former end-coil of B and transformer KB also is positioned at motor comprehensive protection controller BD and three instrument transformer L1; L2; between the L3.
The model of motor comprehensive protection controller BD is JDK8S.
Be attempted by the two ends of the first secondary end-coil of transformer KB after often the opening auxiliary contact QF2-K2 and run indicator HD connects of A.C. contactor QF2, power supply indicator LD is attempted by the two ends of the second secondary end-coil of transformer KB, the warning output of PLC control module AM indicator light AD taking alarm.
The model of PLC control module AM is LGK7M-DR20U/DC, and A.C. contactor QF2 is the vacuum A.C. contactor.
This oil pumper reactive-load compensation capacitor control circuit is applicable to the oil pumper that adopts 600V-1140V power supply.
Embodiment two: referring to Fig. 2, among the figure, oil pumper reactive-load compensation capacitor control circuit contains vacuum circuit-breaker QF1 and A.C. contactor QF2, enter the input of the three phase electric machine 3M of oil pumper behind three main contacts QF1-K1 of three-phase alternating current through vacuum circuit-breaker QF1, three reactive-load compensation capacitor C1, C2, C3 is joined together to form a triangle connector in the triangle mode, main contacts QF2-K1 and three-phase AC line A are often opened by three of A.C. contactor QF2 respectively in three summits of triangle connector, B, C connects, this oil pumper reactive-load compensation capacitor control circuit also contains PLC control module AM and three reactor XL1, XL2, XL3, be arranged on three-phase AC line A, B, three instrument transformer L1 on the C, L2, L3 respectively with three instrument transformer input A1 of PLC control module AM, B1, C1 connects, two-phase power taking circuit is connected to three-phase AC line A, B, two-phase circuit A among the C, on the B, the output normally opened contact of PLC control module AM be attempted by between the two-phase power taking circuit after the coil QF2-L of A.C. contactor QF2 connects, the auxiliary contact QF1-K2 of vacuum circuit-breaker QF1 with also be attempted by between the two-phase power taking circuit three reactor XL1 after the input coil of PLC control module AM is connected, XL2, XL3 is serially connected in three-phase AC line A respectively, B, on the C.
Three-phase alternating current is successively by knife switch DK; three fuse FU1; FU2; FU3; three main contacts QF1-K1 of vacuum circuit-breaker QF1; motor comprehensive protection controller BD; three reactor XL1; XL2; enter the input of three phase electric machine 3M behind the XL3; three instrument transformer L1; L2; L3 is arranged on motor comprehensive protection controller BD and three reactor XL1; XL2; three-phase AC line A between the XL3; B; on the C; often open main contacts QF2-K1 and three-phase AC line A for three of A.C. contactor QF2; B; the tie point of C is positioned at motor comprehensive protection controller BD and three instrument transformer L1; L2; between the L3, two-phase power taking circuit and three-phase AC line A; B; two-phase circuit A among the C; the tie point of B also is positioned at motor comprehensive protection controller BD and three instrument transformer L1; L2; between the L3.
The model of motor comprehensive protection controller BD is JDK8S.
Be attempted by between the two-phase power taking circuit after often the opening auxiliary contact QF2-K2 and run indicator HD connects of A.C. contactor QF2, power supply indicator LD is attempted by between the two-phase power taking circuit, the warning output of PLC control module AM indicator light AD taking alarm.
The model of PLC control module AM is LGK7M-DR20U/DC.
This oil pumper reactive-load compensation capacitor control circuit is applicable to the oil pumper that adopts the 380V power supply.
Claims (10)
1. oil pumper reactive-load compensation capacitor control circuit, contain vacuum circuit-breaker and A.C. contactor, three-phase alternating current is through entering the input of the three phase electric machine of oil pumper behind three main contactss of vacuum circuit-breaker, three reactive-load compensation capacitors are joined together to form a triangle connector in the triangle mode, three summits of triangle connector, three by A.C. contactor are respectively often opened main contacts and are connected with three-phase AC line, it is characterized in that: also contain the PLC control module, transformer and three reactors, three instrument transformers that are arranged on the three-phase AC line are connected with three instrument transformer inputs of PLC control module respectively, the two-phase circuit of appointing in the three-phase AC line is connected with the two ends of the former end-coil of transformer respectively, the output normally opened contact of PLC control module and the two ends that are attempted by the first secondary end-coil of transformer after the coil of A.C. contactor is connected, the auxiliary contact of vacuum circuit-breaker and the two ends that are attempted by the second secondary end-coil of transformer after the input coil of PLC control module is connected, three reactors are serially connected on the three-phase AC line respectively.
2. oil pumper reactive-load compensation capacitor control circuit according to claim 1; it is characterized in that: described three-phase alternating current passes through knife switch successively; three fuses; three main contactss of vacuum circuit-breaker; the motor comprehensive protection controller; enter the input of three phase electric machine behind three reactors; described three instrument transformers are arranged on the three-phase AC line between motor comprehensive protection controller and three reactors; the tie point that three of described A.C. contactor often open main contacts and three-phase AC line is between motor comprehensive protection controller and three instrument transformers, and the tie point at the two ends of the former end-coil of appointing two-phase circuit and transformer in the three-phase AC line is also between motor comprehensive protection controller and three instrument transformers.
3. oil pumper reactive-load compensation capacitor control circuit according to claim 2 is characterized in that: the model of described motor comprehensive protection controller is JDK8S.
4. oil pumper reactive-load compensation capacitor control circuit according to claim 1, it is characterized in that: the two ends that are attempted by the first secondary end-coil of transformer after often the driving auxiliary contact and run indicator is connected of described A.C. contactor, described power supply indicator is attempted by the two ends of the second secondary end-coil of transformer, the warning output indicator light taking alarm of described PLC control module.
5. oil pumper reactive-load compensation capacitor control circuit according to claim 4 is characterized in that: the model of described PLC control module is LGK7M-DR20U/DC, and described A.C. contactor is the vacuum A.C. contactor.
6. oil pumper reactive-load compensation capacitor control circuit, contain vacuum circuit-breaker and A.C. contactor, three-phase alternating current is through entering the input of the three phase electric machine of oil pumper behind three main contactss of vacuum circuit-breaker, three reactive-load compensation capacitors are joined together to form a triangle connector in the triangle mode, three summits of triangle connector, three by A.C. contactor are respectively often opened main contacts and are connected with three-phase AC line, it is characterized in that: also contain PLC control module and three reactors, three instrument transformers that are arranged on the three-phase AC line are connected with three instrument transformer inputs of PLC control module respectively, two-phase power taking circuit is connected to appointing on the two-phase circuit in the three-phase AC line, the output normally opened contact of PLC control module be attempted by between the two-phase power taking circuit after the coil of A.C. contactor is connected, the auxiliary contact of vacuum circuit-breaker with also be attempted by between the two-phase power taking circuit after the input coil of PLC control module is connected, three reactors are serially connected on the three-phase AC line respectively.
7. oil pumper reactive-load compensation capacitor control circuit according to claim 6; it is characterized in that: described three-phase alternating current passes through knife switch successively; three fuses; three main contactss of vacuum circuit-breaker; the motor comprehensive protection controller; enter the input of three phase electric machine behind three reactors; described three instrument transformers are arranged on the three-phase AC line between motor comprehensive protection controller and three reactors; the tie point that three of described A.C. contactor often open main contacts and three-phase AC line is between motor comprehensive protection controller and three instrument transformers, and the tie point of appointing the two-phase circuit in two-phase power taking circuit and the three-phase AC line is also between motor comprehensive protection controller and three instrument transformers.
8. oil pumper reactive-load compensation capacitor control circuit according to claim 7 is characterized in that: the model of described motor comprehensive protection controller is JDK8S.
9. oil pumper reactive-load compensation capacitor control circuit according to claim 6, it is characterized in that: be attempted by between the two-phase power taking circuit after often the driving auxiliary contact and run indicator is connected of described A.C. contactor, described power supply indicator is attempted by between the two-phase power taking circuit, the warning output indicator light taking alarm of described PLC control module.
10. oil pumper reactive-load compensation capacitor control circuit according to claim 9 is characterized in that: the model of described PLC control module is LGK7M-DR20U/DC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200398595U CN201937276U (en) | 2011-02-16 | 2011-02-16 | Reactive compensating capacitor control circuit of beam pumping unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200398595U CN201937276U (en) | 2011-02-16 | 2011-02-16 | Reactive compensating capacitor control circuit of beam pumping unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201937276U true CN201937276U (en) | 2011-08-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200398595U Expired - Lifetime CN201937276U (en) | 2011-02-16 | 2011-02-16 | Reactive compensating capacitor control circuit of beam pumping unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201937276U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102082441A (en) * | 2011-02-16 | 2011-06-01 | 刘锋 | Control circuit of reactive power compensating capacitors for pumping unit |
-
2011
- 2011-02-16 CN CN2011200398595U patent/CN201937276U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102082441A (en) * | 2011-02-16 | 2011-06-01 | 刘锋 | Control circuit of reactive power compensating capacitors for pumping unit |
| CN102082441B (en) * | 2011-02-16 | 2012-10-31 | 刘锋 | Control circuit of reactive power compensating capacitors for pumping unit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110817 Effective date of abandoning: 20130306 |
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| RGAV | Abandon patent right to avoid regrant |