CN202150819U - Voltage regulating and compensating soft-start device of reactor of high-voltage AC motor - Google Patents
Voltage regulating and compensating soft-start device of reactor of high-voltage AC motor Download PDFInfo
- Publication number
- CN202150819U CN202150819U CN 201120224161 CN201120224161U CN202150819U CN 202150819 U CN202150819 U CN 202150819U CN 201120224161 CN201120224161 CN 201120224161 CN 201120224161 U CN201120224161 U CN 201120224161U CN 202150819 U CN202150819 U CN 202150819U
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- reactor
- motor
- switch
- main circuit
- compensation capacitors
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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
The utility model belongs to the field of soft start technology of motors and relates to a voltage regulating and compensating soft-start device of a reactor of a high-voltage AC motor. The soft-start device includes a main circuit, a central control unit, a reactor, a reactive compensation capacitor assembly, a switching device of the reactive compensation capacitor assembly. In the utility model, the main circuit of the soft-start device includes a starting switch, a short circuit switch and a current detecting unit. The starting switch, the short circuit and the current detecting unit are connected together in series. A three-phase input terminal of the main circuit is used for connecting a three-phase power source. Another terminal of the main circuit is used for connecting the motor. The reactor is connected to a high-voltage starting loop in series and connects with the short circuit switch in parallel. A series circuit composed of the switching device of the reactive compensation capacitor assembly and the reactive compensation capacitor assembly connects with a series circuit composed of the reactor and the motor in parallel. The central control unit receives signals from the starting switch and the current detecting unit and sends instructions to the switching device of the reactive compensation capacitor assembly, so as to control the reactive compensation capacitor assembly to start running.
Description
Technical field
The utility model belongs to the flexible starter for electric motor technical field, relates to a kind of high voltage motor reactor regulating compensation soft starter device.
Background technology
At present, the high voltage motor soft start has modes such as the soft start of liquid resistance, thyristor soft start, frequency converter soft start and reactor soft start.Wherein the liquid resistance box volume of liquid resistance starting device is big, transportation and difficult installation, and use in the area that is not suitable for being prone to freeze; The thyristor soft starter device adopts a plurality of thyristor series connection dividing potential drops at present, and is higher to the characterisitic parameter coherence request of thyristor, in case all press performance to reduce, very easily causes the damage of whole string components and parts, repairs difficulty; The frequency converter soft starter device is then because it costs an arm and a leg technical sophistication, unsuitable domestic a large amount of high-tension motor startup of unit; And the reactor soft starter device, because its volume is little, convenient for installation and maintenance, advantage such as security reliability is good has obtained extensive use.But in practical application; Often consider conservation of power and reduce electric power increase-volume investment, avoid the network transformer capacity excessive and cause electric energy loss, network transformer capacity that certain limit should be arranged; And the power factor during motor starting is low excessively; Reactive current is excessive, has taken a constant volume of network transformer, makes comparatively difficulty of motor starting sometimes.
Summary of the invention
The purpose of the utility model is exactly not enough to prior art, and a kind of high voltage motor reactor regulating compensation soft starter device is provided, and can carry out reactive power compensation to motor when this device is used to start high voltage motor.
The technical solution of the utility model is: a kind of high voltage motor reactor regulating compensation soft starter device, and its difference is: it comprises, and main circuit, centralized control unit, reactor, compensation capacitors are closed, compensation capacitors is closed fling-cut switch; Main circuit comprises starting switch, shorting switch, the current detecting unit of series connection successively, and the three-phase input end of main circuit is used to connect three phase mains, and the other end of main circuit is used to connect motor; Reactor is connected in the high pressure start loop and is parallelly connected with shorting switch, by compensation capacitors close fling-cut switch, that compensation capacitors is closed the series circuit that constitutes is parallelly connected with the series circuit that is made up of reactor and motor; Centralized control unit receives the signal from starting switch and current detecting unit, close fling-cut switch to compensation capacitors and send instruction, thereby the control compensation capacitors is closed and is devoted oneself to work.
The utility model operation principle: in the starting process of motor; Closing fling-cut switch control compensation capacitors through compensation capacitors closes; When starting, add reactive-load compensation capacitor and can reduce reactive current greatly; The control defective of reactive power compensation on the spot be can not carry out when effectively having overcome reactor soft start motor to motor, very strong minor scale power net starting capability and high reliability the utlity model has.
The beneficial effect of the utility model is: the utility model device closes owing in the reactor soft starter device, being provided with compensation capacitors, can effectively reduce the starting current of motor, avoids the impact to electrical network; Can reduce the distribution capacity of relevant match appliance, conservation of power increase-volume investment; Can reduce the mechanical shock when starting of motor and load equipment; Can improve the starting power factor of motor.
Description of drawings
Fig. 1 is the circuit theory diagrams of the utility model embodiment.
Among the figure: the R-reactor, the K-centralized control unit, the QF-starting switch, the KM1-shorting switch, the KM2-compensation capacitors is closed fling-cut switch, and the C-compensation capacitors is closed, AT-current detecting unit, M-motor.
Embodiment
Below in conjunction with accompanying drawing the utility model embodiment is further specified.
As shown in Figure 1; A kind of high voltage motor reactor regulating compensation soft starter device; Its main circuit, centralized control unit K, reactor R, compensation capacitors are closed C, compensation capacitors is closed fling-cut switch KM2; Main circuit comprises starting switch QF, shorting switch KM1, the current detecting unit AT of series connection successively, and the three-phase input end of starting switch QF is used to connect three phase mains, and current detecting unit AT is used for tandem motor; Reactor R is connected in the high pressure start loop and is parallelly connected with shorting switch KM1, and closing fling-cut switch KM2, compensation capacitors by compensation capacitors, to close the series circuit that C constitutes parallelly connected with the series circuit that is made up of reactor and motor; Centralized control unit K receives the signal from starting switch QF and current detecting unit AT, close fling-cut switch KM2 to compensation capacitors and send instruction, thereby the control compensation capacitors is closed C and is devoted oneself to work.
During starting, closed starting switch QF, centralized control unit K start working reactor R, through reactor R, output voltage are changed, and press the setting curve increase.Simultaneously, centralized control unit K closes fling-cut switch KM2 adjustment input compensation capacitors according to the power factor adjustment through compensation capacitors and closes, and forms local compensation.When detecting electric current through current detecting unit AT, center control unit K descends; Be the rotating speed of motor M during near rated speed, the start loop power factor rises, and reactive current reduces; Real component increases; This is that centralized control unit K control shorting switch KM1 begins adhesive, and bypasses reactor R, and motor M starts completion.System continues the running status of monitoring motor M, and the various faults alarm and protection is provided.
Below the electric pressure 10kV, power 30000KW and following high pressure cage asynchronous motor when carrying out reactor soft start reactive power compensation, be particularly suitable for using the utility model device.
Above content is the further explain that combines concrete execution mode that the utility model is done, and can not assert that the practical implementation of the utility model is confined to these explanations.For the those of ordinary skill of technical field under the utility model, under the prerequisite that does not break away from the utility model design, can also make some simple deduction or replace, all should be regarded as belonging to the protection range of the utility model.
Claims (1)
1. high voltage motor reactor regulating compensation soft starter device, it is characterized in that: it comprises, and main circuit, centralized control unit, reactor, compensation capacitors are closed, compensation capacitors is closed fling-cut switch; Main circuit comprises starting switch, shorting switch, the current detecting unit of series connection successively, and the three-phase input end of main circuit is used to connect three phase mains, and the other end of main circuit is used to connect motor; Reactor is connected in the high pressure start loop and is parallelly connected with shorting switch, by compensation capacitors close fling-cut switch, that compensation capacitors is closed the series circuit that constitutes is parallelly connected with the series circuit that is made up of reactor and motor; Centralized control unit receives the signal from starting switch and current detecting unit, close fling-cut switch to compensation capacitors and send instruction, thereby the control compensation capacitors is closed and is devoted oneself to work.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120224161 CN202150819U (en) | 2011-06-29 | 2011-06-29 | Voltage regulating and compensating soft-start device of reactor of high-voltage AC motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120224161 CN202150819U (en) | 2011-06-29 | 2011-06-29 | Voltage regulating and compensating soft-start device of reactor of high-voltage AC motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202150819U true CN202150819U (en) | 2012-02-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120224161 Expired - Fee Related CN202150819U (en) | 2011-06-29 | 2011-06-29 | Voltage regulating and compensating soft-start device of reactor of high-voltage AC motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202150819U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103903912A (en) * | 2014-04-14 | 2014-07-02 | 杭州得诚电力科技有限公司 | Synchronous switch and control method thereof |
| CN108448947A (en) * | 2018-05-24 | 2018-08-24 | 浙江智海化工设备工程有限公司 | A kind of Large-scale High-Pressure starting device of motor |
-
2011
- 2011-06-29 CN CN 201120224161 patent/CN202150819U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103903912A (en) * | 2014-04-14 | 2014-07-02 | 杭州得诚电力科技有限公司 | Synchronous switch and control method thereof |
| CN103903912B (en) * | 2014-04-14 | 2016-09-28 | 杭州得诚电力科技股份有限公司 | Synchro switch and control method thereof |
| CN108448947A (en) * | 2018-05-24 | 2018-08-24 | 浙江智海化工设备工程有限公司 | A kind of Large-scale High-Pressure starting device of motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20120222 Termination date: 20190629 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |