CN201699650U - Electric machine voltage compensation control device for farmland water pump - Google Patents
Electric machine voltage compensation control device for farmland water pump Download PDFInfo
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- CN201699650U CN201699650U CN2010202611242U CN201020261124U CN201699650U CN 201699650 U CN201699650 U CN 201699650U CN 2010202611242 U CN2010202611242 U CN 2010202611242U CN 201020261124 U CN201020261124 U CN 201020261124U CN 201699650 U CN201699650 U CN 201699650U
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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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Abstract
An electric machine voltage compensation control device for a farmland water pump relates to the technical field of electric machines for farmland water pumps and resolves the problem of power supply of electric machines for farmland water pumps during rural power consumption peak time. Three-phase output ends of a first circuit breaker are connected with a primary side three-phase input end of a three-phase transformer, a secondary side three-phase output end of the three-phase transformer is connected with three-phase input ends of a second contactor, a secondary side center tap of the three-phase transformer is connected with three-phase input ends of a first contactor, three-phase output ends of the second contactor are connected with three-phase input ends of a thermal relay after being correspondingly connected with three-phase output ends of the first contactor, a voltage detection and control unit is connected between two-phase output ends of the three-phase output ends of the first circuit breaker, one of three circuits of the output ends of the first circuit breaker is provided with a primary side of a current transformer, and a secondary side of the current transformer is connected with an ampere meter. The electric machine voltage compensation control device is used for compensating voltage of electric machines for the farmland water pumps.
Description
Technical field
The utility model relates to a kind of farmland water pump electric moter voltage compensate control apparatus, belongs to farmland water pump technical field of motors.
Background technology
At the user terminal of rural power grids and power supply remote districts, a transformer often will drive 300 to 400 farmland pump workings in tens kilometers supply districts simultaneously, and so big load causes the power supply quality of electrical network very poor.Show as: the concentrated pumping irrigation phase of peak times of power consumption and farmland water pump, supply power voltage drops to 260～300 volts from 400 volts, even electric voltage dropping about 200 volts appears, so big voltage fluctuation meeting cause controlling the farmland water pump with the A.C. contactor of motor tremble, contact arcing, coil smolder and burn and over current of motor such as burns at fault, and be very easily accidents caused.Under the situation that supply power voltage significantly falls; protection equipment such as the peasant household that has even cancellation contactor, thermal relay and fuse; directly power supply is guided to the input of farmland water pump with motor, force motor under the situation of 50% rated voltage, to move, in this case with disconnecting link; the operating current of motor will reach 1.5 times of rated current; cause motor to be exerted oneself inadequately, rotating speed descends, and water yield obviously reduces; strengthened the line loss consumption of electrical network simultaneously, made power supply be in the collapse precarious position.
The peasant household that has selects for use big capacity autotransformer automatic pressure-regulating type pressurizer to regulate supply power voltage, because pressurizer need bear the impact of farmland water pump with the big electric current of motor transient starting, its capacity need reach the farmland water pump with more than the several times of power of motor, causes oneself power consumption big; Because the sliding contact of described pressurizer frequently moves, and the arc light between the contact can influence the useful life of pressurizer again, therefore, this mode is not suitable for large tracts of land and promotes the use of simultaneously.
For not delaying field irrigation opportunity, the mode that the peasant household that also has takes to purchase diesel generating set solves the powerup issue of farmland water pump, causes the cost of field irrigation significantly to increase like this.
Summary of the invention
The utility model provides a kind of farmland water pump electric moter voltage compensate control apparatus in order to solve the powerup issue of farmland, rural electricity consumption peak period water pump with motor.
The utility model comprises first circuit breaker, the 3rd contactor, thermal relay and motor, be cascaded by the 3rd contactor and thermal relay between first circuit breaker and the motor, the three-phase output end of first circuit breaker connects the three-phase input end of the 3rd contactor, the three-phase output end of the 3rd contactor connects the three-phase input end of thermal relay, and the three-phase output end of thermal relay connects the three-phase input end of motor;
It also comprises current transformer, ammeter, voltage detecting and control unit, three-phase transformer, first contactor and second contactor,
Be parallel with three-phase transformer, first contactor and second contactor on the circuit between first circuit breaker and the thermal relay, the three-phase output end of first circuit breaker connects the primary side three-phase input end of three-phase transformer, the secondary side three-phase output end of three-phase transformer connects the three-phase input end of second contactor, the secondary side centre cap of three-phase transformer connects the three-phase input end of first contactor, and the corresponding back that is connected of the three-phase output end of the three-phase output end of second contactor and first contactor is connected with the three-phase input end of thermal relay; Connect voltage detecting and control unit between two phase output terminals in the three-phase output end of first circuit breaker; Circuit between first circuit breaker and the 3rd contactor is provided with current transformer and ammeter, and a circuit in the three-line of the first circuit breaker output is provided with the primary side of current transformer, and the secondary side of current transformer connects ammeter.
It also comprises second circuit breaker, three-phase compensation capacitor group and voltmeter,
The three-phase input end of second circuit breaker connects the three-phase output end of thermal relay, and the three-phase output end of second circuit breaker connects the three-phase compensation capacitor group, connects voltmeter between two phase output terminals in the three-phase output end of second circuit breaker.
Described three-phase compensation capacitor group is made up of three capacitors, and three capacitors adopt dihedrals to connect, three angles of three-phase compensation capacitor group and the corresponding connection of three-phase output end of second circuit breaker.
The utility model has the advantages that: the utlity model has following advantage:
1, the utility model integrates the farmland water pump and boosts and reactive power compensation with startup, protection, the low-voltage of motor, overcome the deficiency of using autotransformer automatic pressure-regulating type pressurizer to regulate the motor supply power voltage, guaranteed that the farmland water pump still can safe and reliable work under the situation that line voltage significantly falls with motor;
2, the input terminal voltage that the three-phase compensation capacitor group can the lifting motor can be brought up to the power factor of motor more than 0.99 simultaneously, has reduced the line loss consumption;
3, the capacity of the three-phase transformer that adopts of the utility model only is required to be 20% of capacity motor and can meets the demands, and the power loss of himself is no more than 0.3% of rated capacity, and energy-saving effect is obvious;
4, the utility model uses in enormous quantities in the rural area, can obviously reduce the line loss of electric power system, reduces the line drop of electric power system.
Description of drawings
Fig. 1 is an electrical block diagram of the present utility model.
Embodiment
Embodiment one: present embodiment is described below in conjunction with Fig. 1, present embodiment comprises the first circuit breaker Q F, the 3rd contactor KM3, thermal relay FR and motor M, be cascaded by the 3rd contactor KM3 and thermal relay FR between the first circuit breaker Q F and the motor M, the three-phase output end of the first circuit breaker Q F connects the three-phase input end of the 3rd contactor KM3, the three-phase output end of the 3rd contactor KM3 connects the three-phase input end of thermal relay FR, and the three-phase output end of thermal relay FR connects the three-phase input end of motor M;
It also comprises current transformer CTA, ammeter PA, voltage detecting and control unit DYJC, three-phase transformer BK, the first contactor KM1 and the second contactor KM2,
Be parallel with three-phase transformer BK on the circuit between the first circuit breaker Q F and the thermal relay FR, the first contactor KM1 and the second contactor KM2, the three-phase output end of the first circuit breaker Q F connects the primary side three-phase input end of three-phase transformer BK, the secondary side three-phase output end of three-phase transformer BK connects the three-phase input end of the second contactor KM2, the secondary side centre cap of three-phase transformer BK connects the three-phase input end of the first contactor KM1, and the corresponding back that is connected of the three-phase output end of the three-phase output end of the second contactor KM2 and the first contactor KM1 is connected with the three-phase input end of thermal relay FR; Connect voltage detecting and control unit DYJC between two phase output terminals in the three-phase output end of the first circuit breaker Q F; Circuit between the first circuit breaker Q F and the 3rd contactor KM3 is provided with current transformer CTA and ammeter PA, a circuit in the three-line of the first circuit breaker Q F output is provided with the primary side of current transformer CTA, and the secondary side of current transformer CTA connects ammeter PA.
The described farmland of present embodiment water pump electric moter voltage compensate control apparatus, in use, the three-phase input end of the first circuit breaker Q F is connected with the three phase supply power supply of electrical network, the secondary side of the three-phase transformer BK that adopts has tap structure, and the size of its secondary voltage is with reference to the fluctuation range value of supply power voltage; Three-phase transformer BK is a step-down transformer, and its secondary voltage is connected the back to the motor M power supply with supply voltage, and this mode can make the capacity of the three-phase transformer BK of employing reduce as far as possible, is about 20% of motor M capacity and gets final product.
In order to improve the input terminal voltage of motor M, present embodiment is not to adopt step-up transformer that low-voltage is raised to 380 volts, but the employing step-down transformer, with the secondary voltage of step-down transformer be input on the motor M after supply voltage is connected in series, its two kinds of voltages be serially connected with the phase place requirement.
Embodiment two: below in conjunction with Fig. 1 present embodiment is described, the difference of present embodiment and execution mode one is that it also comprises the second circuit breaker Q L, three-phase compensation capacitor group 1 and voltmeter PV,
The three-phase input end of the second circuit breaker Q L connects the three-phase output end of thermal relay FR, connects voltmeter PV between two phase output terminals in the three-phase output end of three-phase output end connection three-phase compensation capacitor group 1, the second circuit breaker Q L of the second circuit breaker Q L.Other composition and annexation are identical with execution mode one.
The three-phase compensation capacitor group 1 that adopts in the present embodiment is parallel to the three-phase input end of motor M, it can form the humorous loop of offset with the leakage reactance L of three-phase transformer BK, input terminal voltage that can the lifting motor M, compensate its power factor simultaneously, reduce the reactive loss of motor M, and can suppress the too high self-induced e.m.f that motor M when outage produces.
Embodiment three: present embodiment is described below in conjunction with Fig. 1, the difference of present embodiment and execution mode two is that described three-phase compensation capacitor group 1 is made up of three capacitors, three capacitors adopt dihedrals to connect, three angles of three-phase compensation capacitor group 1 and the corresponding connection of three-phase output end of the second circuit breaker Q L.Other composition and annexation are identical with execution mode two.
The course of work: the secondary tap of three-phase transformer BK can provide the auxiliary voltage of power supply for motor M, this auxiliary voltage is serially connected between power supply and the motor M by contactor control, at any time detect the variation of supply voltage by voltage detecting and control unit DYJC, when supply voltage for gradually hour, voltage detecting and control unit DYJC can provide instruction automatically the 3rd contactor KM3 is disconnected, as required the first contactor KM1 or the second contactor KM2 are connected, auxiliary voltage is superimposed upon on the supply voltage, make load motor M obtain voltage source, the input terminal voltage of motor M is stabilized in the normal range of operation of motor through overcompensation.Voltage detecting and control unit DYJC be the variation of tracking power supply voltage automatically, input terminal voltage to motor M is in time adjusted, when supply voltage returns to normal voltage 370V when above, voltage detecting and control unit DYJC can in time excise additional voltage source from circuit, make the input of motor M overvoltage can not occur.
The stack of auxiliary voltage and supply voltage need be satisfied synchronous requirement, by voltage detecting and control unit DYJC according to the supply voltage situation that detects, automatically realize a phase place and supply voltage homophase, the auxiliary voltage that amplitude equals the supply voltage drop-out value is superimposed upon on the supply voltage, makes motor M obtain power supply through overcompensation.
Embodiment four: the difference of present embodiment and execution mode one is that the secondary side centre cap place output voltage of described three-phase transformer BK is the rated voltage of 10% power supply, and the secondary side three-phase output end output voltage of three-phase transformer BK is the rated voltage of 20% power supply.Other composition and annexation are identical with execution mode one.
Present embodiment makes the secondary tap of three-phase transformer BK that 10% to 20% auxiliary voltage of power supply can be provided for motor M.
The utility model is not limited to above-mentioned execution mode, can also be the reasonable combination of technical characterictic described in the respective embodiments described above.
Claims (3)
1. farmland water pump electric moter voltage compensate control apparatus, it comprises first circuit breaker (QF), the 3rd contactor (KM3), thermal relay (FR) and motor (M), it is characterized in that: be cascaded by the 3rd contactor (KM3) and thermal relay (FR) between first circuit breaker (QF) and the motor (M), the three-phase output end of first circuit breaker (QF) connects the three-phase input end of the 3rd contactor (KM3), the three-phase output end of the 3rd contactor (KM3) connects the three-phase input end of thermal relay (FR), and the three-phase output end of thermal relay (FR) connects the three-phase input end of motor (M);
It also comprises current transformer (CTA), ammeter (PA), voltage detecting and control unit (DYJC), three-phase transformer (BK), first contactor (KM1) and second contactor (KM2),
Be parallel with three-phase transformer (BK) on the circuit between first circuit breaker (QF) and the thermal relay (FR), first contactor (KM1) and second contactor (KM2), the three-phase output end of first circuit breaker (QF) connects the primary side three-phase input end of three-phase transformer (BK), the secondary side three-phase output end of three-phase transformer (BK) connects the three-phase input end of second contactor (KM2), the secondary side centre cap of three-phase transformer (BK) connects the three-phase input end of first contactor (KM1), and the corresponding back that is connected of the three-phase output end of the three-phase output end of second contactor (KM2) and first contactor (KM1) is connected with the three-phase input end of thermal relay (FR); Connect voltage detecting and control unit (DYJC) between two phase output terminals in the three-phase output end of first circuit breaker (QF); Circuit between first circuit breaker (QF) and the 3rd contactor (KM3) is provided with current transformer (CTA) and ammeter (PA), a circuit in the three-line of first circuit breaker (QF) output is provided with the primary side of current transformer (CTA), and the secondary side of current transformer (CTA) connects ammeter (PA).
2. farmland according to claim 1 water pump electric moter voltage compensate control apparatus is characterized in that: it also comprises second circuit breaker (QL), three-phase compensation capacitor group (1) and voltmeter (PV),
The three-phase input end of second circuit breaker (QL) connects the three-phase output end of thermal relay (FR), the three-phase output end of second circuit breaker (QL) connects three-phase compensation capacitor group (1), connects voltmeter (PV) between two phase output terminals in the three-phase output end of second circuit breaker (QL).
3. farmland according to claim 2 water pump electric moter voltage compensate control apparatus, it is characterized in that: described three-phase compensation capacitor group (1) is made up of three capacitors, three capacitors adopt dihedrals to connect, three angles of three-phase compensation capacitor group (1) and the corresponding connection of three-phase output end of second circuit breaker (QL).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202611242U CN201699650U (en) | 2010-07-16 | 2010-07-16 | Electric machine voltage compensation control device for farmland water pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202611242U CN201699650U (en) | 2010-07-16 | 2010-07-16 | Electric machine voltage compensation control device for farmland water pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201699650U true CN201699650U (en) | 2011-01-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202611242U Expired - Lifetime CN201699650U (en) | 2010-07-16 | 2010-07-16 | Electric machine voltage compensation control device for farmland water pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201699650U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105807172A (en) * | 2016-06-01 | 2016-07-27 | 国家电网公司 | Ultrahigh voltage substation simulated operation verifying system |
-
2010
- 2010-07-16 CN CN2010202611242U patent/CN201699650U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105807172A (en) * | 2016-06-01 | 2016-07-27 | 国家电网公司 | Ultrahigh voltage substation simulated operation verifying system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: HARBIN FUYE ELECTRIC TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: HARBIN WEIHAN ELECTRIC EQUIPMENT CO., LTD. Effective date: 20150130 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20150130 Address after: 150060 Heilongjiang city of Harbin province Pingfang District haping Road District Bohai Road No. 25 Patentee after: Harbin Fu Fu Electric Technology Co., Ltd. Address before: 150060 Heilongjiang city of Harbin province Pingfang District haping Road District Bohai Road No. 25 Patentee before: Harbin Weihan Electric Equipment Co., Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170517 Address after: 300308, Tianjin Binhai New Area Free Trade test area (Airport Economic Zone), ten East 121 Patentee after: TIANJIN WEIHAN ELECTRIC CO., LTD. Address before: 150060 Heilongjiang city of Harbin province Pingfang District haping Road District Bohai Road No. 25 Patentee before: Harbin Fu Fu Electric Technology Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110105 |