CN201918938U - Liquid capacity expansion soft start device of high-voltage motor - Google Patents
Liquid capacity expansion soft start device of high-voltage motor Download PDFInfo
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- CN201918938U CN201918938U CN2011200163528U CN201120016352U CN201918938U CN 201918938 U CN201918938 U CN 201918938U CN 2011200163528 U CN2011200163528 U CN 2011200163528U CN 201120016352 U CN201120016352 U CN 201120016352U CN 201918938 U CN201918938 U CN 201918938U
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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
A liquid capacity expansion soft start device of a high-voltage motor comprises a high voltage switchgear (4), a liquid soft start unit (2) and an operation unit (3) and is characterized in that the soft start device further comprises a capacity expansion compensation unit (1); the capacity expansion compensation unit (1) is connected in parallel with a main circuit consisting of the high voltage switchgear (4) and a motor unit. The capacity expansion compensation unit(1) at least comprises a set of high voltage capacitor fling-cut unit and a dynamic reactive power controller, wherein, the high voltage capacitor fling-cut unit comprises a fling-cut switch and a high-voltage capacitor, and the fling-cut switch is electrically connected with dynamic reactive power control signals; and the dynamic reactive power controller adjusts the size of the reactive power compensation capacitor through fling-cut control signals outputted by a logic programming. Based on a conventional liquid soft start device of a high-voltage A.C. motor, a static reactive power capacitance compensation device is additionally arranged, and the invested reactive power compensation quantity is decided by detecting the rotational speed of the motor and calculating the reactive power requirements in the start processing, so that the range of the application of the conventional liquid soft start compensation device is expanded and better technical effect is achieved.
Description
Technical field
The present utility model relates to a kind of increase-volume soft starter device, relates in particular to the liquid increase-volume soft starter device of a kind of high-power high voltage motor.
Background technology
Flexibly starting high voltage motor is divided into three kinds: solid soft start, liquid soft starting, reactor starting.
The solid soft start control system can be started and protects motor; its CPU carries out phase angle to controllable silicon and triggers the voltage that is added in when control is started to reduce on the motor; control by progressively is added in the level and smooth increase motor electromagnetic torque of voltage on the motor then, accelerates to full speed running up to motor.This start mode can reduce the inrush current of motor, reduces the impact to electrical network and motor self.Also reduced simultaneously being connected in the mechanical shock of mechanical load device on the motor,, reduced fault and maintenance downtime to prolong the useful life of equipment.But at the high power motor starting, solid soft start can produce harmonic wave under the net capacity condition of limited, is not suitable for use in parallel with the FC circuit, can not solve the problem of pressure drop of grid.
For reactor starting, the reactor of being taked in the electric power system is common series reactor and shunt reactor.Series reactor is mainly used to limiting short-circuit current, also has in filter with capacitors in series or in parallelly is used for limiting higher Harmonics in Electric Power Network.But reactor starting is not suitable for the above motor of the starting of high power motor, particularly 10000KW.
Chinese patent CN 10121292A discloses another kind of liquid-state step-down reactive compensation soft starter for high-capacity motor device, comprise liquid-state step-down soft starter device and starting and operation diverter switch, electrical network is inserted by the starting cabinet switch in the end of incoming cables of this liquid-state step-down soft starter device, leading-out terminal links to each other with motor by switching the cabinet switch, and reduced voltage starting device leading-out terminal also and be connected to reactive-load compensation capacitor and carry out system's increase-volume.This invention has reduced the starting current of motor and motor starting to the influence of line voltage, has reduced the voltage fluctuation amplitude, the power factor when having improved motor starting.But foregoing invention is owing to capacity of capacitor bank in the Soft Start-up Process is big, and the switching surge current is big, and the starting time is short, easily cause transient overvoltage in the switching, cause the system works instability, and starting finish after a large amount of capacitor groups withdraw from idlely, can not play the energy saving in running effect.Dynamically do not determine the increase-volume compensation capacity, only utilized the electric capacity of given value, limited range of application.
Summary of the invention
The purpose of this utility model is the defective that exists at prior art, provide a kind of high-tension motor liquid increase-volume soft starter device, its dynamic reactive controller is by the logical program control switching signal of PLC or single-chip microcomputer, calculate the compensation capacity that obtains according to relevant parameter, select the high-voltage power capacitor grouping of respective volume, guarantee normal starting of liquid increase-volume soft starter device and operation compensation, improve system reliability and energy saving in running.
In order to achieve the above object, the liquid increase-volume soft starter device of this high-tension motor provided by the invention comprises high-tension switch cabinet, liquid soft starting unit, operation unit, and it is characterized in that: described soft starting device also is provided with the increase-volume compensating unit; Described increase-volume compensating unit is connected in parallel in the major loop of high-tension switch cabinet and motor unit composition, described increase-volume compensating unit has one a group of high-voltage capacitance switching unit and a dynamic reactive controller at least, described high-voltage capacitance switching unit comprises fling-cut switch and high-voltage capacitor, and fling-cut switch is electrically connected with the dynamic reactive control signal; Described dynamic reactive controller provides the size of control switching Signal Regulation reactive-load compensation capacitor by programming in logic.
The operation unit that inserts the motor asterism in parallel, described liquid soft starter unit, increase-volume bucking-out system Y type inserts the motor power end of incoming cables.
The operation unit that inserts the motor power end of incoming cables in parallel, described liquid soft starter unit, increase-volume compensating unit Y type inserts the power inleting terminal of operation unit.
Described increase-volume compensating unit is made up of 2 ~ 3 groups of high-voltage capacitance switching unit.
Described fling-cut switch is circuit breaker or vacuum contactor.
The liquid increase-volume soft starter device of this high-tension motor that the utility model proposes increases by an increase-volume compensating unit that has a dynamic reactive controller on the basis of original high voltage motor liquid state soft start device, by rotating speed that detects motor and the reactive power compensation amount that decides input through the reactive requirement in the calculating starting process, expand the range of application of existing liquid soft starting compensation arrangement, had better technical effect.
Description of drawings
Fig. 1 is the liquid increase-volume soft starter device of a utility model high-tension motor main circuit composition diagram (soft start inserts motor asterism end);
Fig. 2 is the liquid increase-volume soft starter device of a utility model high-tension motor main circuit composition diagram (soft start inserts the power end of motor).
The drawing reference numeral explanation:
1-increase-volume compensating unit, 2-liquid soft starting unit, 3-moves unit, 4-high-tension switch cabinet, 5-
Dynamic reactive controller A, 6-dynamic reactive controller B.
Below description by its exemplary embodiment being carried out below in conjunction with accompanying drawing, make above-mentioned feature and advantage
Will become apparent and understanding easily.
Embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail.
What accompanying drawing 1 provided is the liquid increase-volume soft starter device of a kind of high-tension motor that motor asterism termination is gone into, and comprises high-tension switch cabinet 4, liquid soft starting unit 2, operation unit 3, and it is characterized in that: described soft starting device also is provided with increase-volume compensating unit 1; Described increase-volume compensating unit 1 is connected in parallel in the major loop of high-tension switch cabinet 4 and motor unit composition, described increase-volume compensating unit 1 is at least by one a group of high-voltage capacitance switching unit and a dynamic reactive controller, described high-voltage capacitance switching unit comprises fling-cut switch KM and high-voltage capacitor C, and fling-cut switch is electrically connected with the dynamic reactive control signal; Described dynamic reactive controller provides the size of control switching Signal Regulation reactive-load compensation capacitor by programming in logic.Among two embodiment that the utility model provides: comprise 5,6, two reactive-load compensation capacitor C of two dynamic reactive controllers
1, C
2And two fling-cut switch KM
1, KM
2, described fling-cut switch KM
1, KM
2Be electrically connected described dynamic reactive controller 5, dynamic reactive controller 6 and described fling-cut switch KM with described high-tension switch cabinet 4
1, KM
2Be electrically connected described fling-cut switch KM
1, KM
2With described reactive-load compensation capacitor C
1, C
2Be electrically connected; Described dynamic reactive controller 5, dynamic reactive controller 6 provide control switching Signal Regulation reactive-load compensation capacitor C by programming in logic respectively
1, C
2Size.
Electrical network is inserted by high-tension switch cabinet 4 in the end of incoming cables of the liquid increase-volume soft starter device of above-mentioned high-tension motor.The fling-cut switch KM that is adopted
1, KM
2Be circuit breaker or vacuum contactor.Compensation capacity calculates by relevant parameter and obtains, and then, selects the high-voltage power capacitor of respective volume according to the compensation capacity that calculates.
The termination high-tension switch cabinet of three-phase alternating-current motor M.High-tension switch cabinet 4 comprises terminal T, starting operation switch QF
1, current transformer TA
1, capacitor C, indicator light L, lightning arrester F
1, zero sequence current mutual inductor TA
3Form with earthed switch K, sub-T inserts mains supply, terminal T, starting operation switch QF by band edge
1, current transformer TA
1, zero sequence current mutual inductor TA
3Meet three-phase alternating-current motor M after the serial connection, current transformer TA
1With zero sequence current mutual inductor TA
3Between and meet an earthed switch K, earthed switch two ends lightning arrester connected in parallel F
1, also be connected in parallel on earthed switch K two ends after capacitor C and the indicator light L series connection.
The other end serial connection operation unit 3 of three-phase alternating-current motor M, described operation unit 3 is by current transformer TA
2With starting operation switch QF
2Be connected to neutral point N after the serial connection
1, neutral point N
1Lead-out wire is connected in series a lightning arrester F
2Back ground connection.The current transformer TA of operation unit 3
2With starting operation switch QF
2Between connect liquid soft starting unit 2.Liquid soft starting unit 2 comprises that one is connected to neutral point N
2Variable resistor A.
The liquid increase-volume soft starter device of a kind of high-tension motor that is applied in the access of motor power end of incoming cables that accompanying drawing 2 provides, the liquid increase-volume soft starter device of high-tension motor wherein, comprise high-tension switch cabinet 4, liquid soft starting unit 2, operation unit 3, it is characterized in that: described soft starting device also is provided with increase-volume compensating unit 1; Described increase-volume compensating unit 1 is connected in parallel in the major loop of high-tension switch cabinet 4 and operation unit 3, described increase-volume compensating unit 1 is at least by one a group of high-voltage capacitance switching unit and a dynamic reactive controller, described high-voltage capacitance switching unit comprises fling-cut switch KM and high-voltage capacitor C, and fling-cut switch is electrically connected with the dynamic reactive control signal; Described dynamic reactive controller provides the size of control switching Signal Regulation reactive-load compensation capacitor by programming in logic.Among two embodiment that the utility model provides: comprise 5,6, two reactive-load compensation capacitor C of two dynamic reactive controllers
1, C
2And two fling-cut switch KM
1, KM
2, described fling-cut switch KM
1, KM
2Be electrically connected described dynamic reactive controller 5, dynamic reactive controller 6 and described fling-cut switch KM with described high-tension switch cabinet 4
1, KM
2Be electrically connected described fling-cut switch KM
1, KM
2With described reactive-load compensation capacitor C
1, C
2Be electrically connected; Described dynamic reactive controller 5, dynamic reactive controller 6 provide control switching Signal Regulation reactive-load compensation capacitor C by programming in logic respectively
1, C
2Size.
Electrical network is inserted by high-tension switch cabinet 4 in the end of incoming cables of the liquid increase-volume soft starter device of above-mentioned high-tension motor.The fling-cut switch KM that is adopted
1, KM
2Be circuit breaker or vacuum contactor.Compensation capacity calculates by relevant parameter and obtains, and then, selects the high-voltage power capacitor of respective volume according to the compensation capacity that calculates.
In addition, change part wherein also has 2 points, one: adopt the liquid soft starting unit of more simplifying 2 also the switch terminals of this liquid soft starter unit 2 to be connected in parallel in the output major loop of increase-volume compensating unit 1 and switch cubicle 4; The output of liquid soft starter unit 2 is connected in parallel in the major loop of operation unit connection three-phase alternating-current motor M.Its two with three-phase alternating-current motor M move to the operation unit 3 output.
By the liquid increase-volume soft starter device of this high-tension motor that adopts technique scheme, on the basis of original high voltage motor liquid state soft start device, increase the dynamic reactive Electric capacity compensation device, by rotating speed that detects motor and the reactive power compensation amount that decides input through the reactive requirement in the calculating starting process.Detail parameters that the determining of reactive compensation capacity needs the user that electrical network, motor, load are provided and user are to the requirement of pressure drop of grid.The idle Electric capacity compensation device that increases has satisfied a large amount of reactive requirement in the motor starting procedure, has reduced producing excessive pressure drop of grid in the motor starting procedure.After using this device, can reduce the dilatation input of low capacity electrical network, economize on resources.
It should be noted that; above content is to further describing that the present invention did in conjunction with concrete execution mode; can not assert that the specific embodiment of the present invention only limits to this; under above-mentioned instruction of the present invention; those skilled in the art can carry out various improvement and distortion on the basis of the foregoing description, and these improvement or distortion drop in protection scope of the present invention.
Claims (5)
1. the liquid increase-volume soft starter device of high-tension motor comprises high-tension switch cabinet (4), liquid soft starting unit (2), operation unit (3), and it is characterized in that: described soft starting device also is provided with increase-volume compensating unit (1); Described increase-volume compensating unit (1) is connected in parallel in the major loop of high-tension switch cabinet (4), motor unit composition, described increase-volume compensating unit (1) has one a group of high-voltage capacitance switching unit and a dynamic reactive controller at least, described high-voltage capacitance switching unit comprises fling-cut switch and high-voltage capacitor, and fling-cut switch is electrically connected with the dynamic reactive control signal; Described dynamic reactive controller provides the size of control switching Signal Regulation reactive-load compensation capacitor by programming in logic.
2. the liquid increase-volume soft starter device of a kind of high-tension motor according to claim 1, it is characterized in that: the operation unit that inserts the motor asterism in parallel, described liquid soft starter unit (2), increase-volume bucking-out system (1) Y type inserts the motor power end of incoming cables.
3. the liquid increase-volume soft starter device of a kind of high-tension motor according to claim 1, it is characterized in that: the operation unit that inserts the motor power end of incoming cables in parallel, described liquid soft starter unit (2), increase-volume bucking-out system (1) Y type inserts the power inleting terminal of operation unit.
4. the liquid increase-volume soft starter device of a kind of high-tension motor according to claim 1, it is characterized in that: described increase-volume compensating unit is made up of 2 ~ 3 groups of high-voltage capacitance switching unit.
5. the liquid increase-volume soft starter device of a kind of high-tension motor according to claim 4, it is characterized in that: described fling-cut switch is circuit breaker or vacuum contactor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200163528U CN201918938U (en) | 2011-01-19 | 2011-01-19 | Liquid capacity expansion soft start device of high-voltage motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200163528U CN201918938U (en) | 2011-01-19 | 2011-01-19 | Liquid capacity expansion soft start device of high-voltage motor |
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| Publication Number | Publication Date |
|---|---|
| CN201918938U true CN201918938U (en) | 2011-08-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200163528U Expired - Fee Related CN201918938U (en) | 2011-01-19 | 2011-01-19 | Liquid capacity expansion soft start device of high-voltage motor |
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|---|---|
| CN (1) | CN201918938U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102354996A (en) * | 2011-10-16 | 2012-02-15 | 国船电气（武汉）有限公司 | Control system and control method based on MCR (magnetic control reactor) dynamic reactive power compensation and soft start |
| CN103138276A (en) * | 2013-02-06 | 2013-06-05 | 广东电网公司佛山供电局 | Reactive compensation method and device of distributing line of high-power motor containing 10 kilovolt (KV) |
| CN105529959A (en) * | 2014-09-30 | 2016-04-27 | 株洲变流技术国家工程研究中心有限公司 | Motor thyristor soft-starting control method and application thereof |
| CN112072958A (en) * | 2019-06-10 | 2020-12-11 | 中科合成油工程有限公司 | Soft start system |
-
2011
- 2011-01-19 CN CN2011200163528U patent/CN201918938U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102354996A (en) * | 2011-10-16 | 2012-02-15 | 国船电气（武汉）有限公司 | Control system and control method based on MCR (magnetic control reactor) dynamic reactive power compensation and soft start |
| CN102354996B (en) * | 2011-10-16 | 2014-01-15 | 国船电气（武汉）有限公司 | Control system and control method based on MCR (magnetic control reactor) dynamic reactive power compensation and soft start |
| CN103138276A (en) * | 2013-02-06 | 2013-06-05 | 广东电网公司佛山供电局 | Reactive compensation method and device of distributing line of high-power motor containing 10 kilovolt (KV) |
| CN103138276B (en) * | 2013-02-06 | 2016-03-02 | 广东电网公司佛山供电局 | A kind of reactive-load compensation method of the distribution line containing 10kV heavy-duty motor and device |
| CN105529959A (en) * | 2014-09-30 | 2016-04-27 | 株洲变流技术国家工程研究中心有限公司 | Motor thyristor soft-starting control method and application thereof |
| CN112072958A (en) * | 2019-06-10 | 2020-12-11 | 中科合成油工程有限公司 | Soft start system |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110803 Termination date: 20180119 |