CN204145339U - A kind of compensation self coupling soft starter device - Google Patents
A kind of compensation self coupling soft starter device Download PDFInfo
- Publication number
- CN204145339U CN204145339U CN201420552407.0U CN201420552407U CN204145339U CN 204145339 U CN204145339 U CN 204145339U CN 201420552407 U CN201420552407 U CN 201420552407U CN 204145339 U CN204145339 U CN 204145339U
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- circuit breaker
- cabinet
- series
- capacitor
- motor
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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 kind of motor compensating formula self coupling soft starter device, is characterized in that: high-voltage power-line is connected with bus-bar through withdrawable circuit breaker, the 1st three-phase instrument transformer TV1; What bus-bar connected successively has the 1st Capacity control cabinet, the 2nd Capacity control cabinet, soft starting cabinet and short circuit cabinet; 1st Capacity control cabinet, the 2nd Capacity control cabinet are connected in series respectively by wire and the 1st high voltage reactor, the 2nd high voltage reactor; Soft starting cabinet connects bus-bar by wire, and the 3rd circuit breaker and autotransformer T are connected in series, and the 6th circuit breaker in the line end of autotransformer T and asterism control cubicle is connected in series, and the 6th circuit breaker and earth connection E are connected in series; The inlet wire of the 4th circuit breaker Q F4 and motor M is connected in series, and the output line of motor M is connected with the 5th current transformer and earth connection; What be connected between the 4th circuit breaker with the 4th current transformer has the 5th circuit breaker, and the 5th circuit breaker is connected with autotransformer centre tap by wire.
Description
Technical field
The utility model relates to the compensation self coupling soft starter device exchanging mesohigh motor, specifically a kind of compensation self coupling soft starter device.
Background technology
Along with the continuous expansion of industrial and mining enterprises' production capacity, power load also continues to increase, the starting capacity of large and medium motor and the contradiction of institute's power distribution network output capacity further outstanding.At present, mesohigh heavy-duty motor generally all adopts reduced voltage starting or soft-start mode, reduce as much as possible starting current and voltage to during electric motor starting to the impact that electrical network and plant equipment produce.Electric machine soft starting comprises liquid resistance reduced voltage starting, variable frequency soft start, controllable silicon series winding soft start etc.Although these soft starter devices (device) centering high-voltage high-power motor serves certain effect, also come with some shortcomings, liquid resistance reduced voltage starting volume is large, and greatly influenced by ambient temperature, low precision, maintenance workload is large.Controllable silicon series winding soft start poor reliability, harmonic content is high.Variable frequency soft start is expensive, and maintenance cost is high, not easily extensively promotes.
Summary of the invention
The purpose of this utility model is the deficiency for existing soft starter device, provides a kind of and compensates self coupling soft starter device; This device is mainly applicable to the soft start of several megawatt to 30MW motor, utilizing this device can meet the requirement of motor starting torque when starting, can reduce again the output current of electrical network.According to the comprehensive parameters of electrical network and mechanical system, within electrical network output current can be controlled in 1.5 ~ 2 times of motor rated current.Supporting electrical network one-time investment and transformer operating cost can be reduced.
The technical solution of the utility model is: a kind of motor compensating self coupling soft starter device, comprises withdrawable circuit breaker QF0, instrument transformer TV1, bus-bar, Capacity control cabinet, the second Capacity control cabinet, capacitor box, soft starting cabinet, short circuit cabinet, asterism control cubicle, motor, motor equivalent electric circuit; It is characterized in that: high-voltage power-line is connected with bus-bar through withdrawable circuit breaker QF0, be provided with the 1st three-phase instrument transformer TV1 in the lower end of withdrawable circuit breaker QF0; What bus-bar connected successively has the 1st Capacity control cabinet, the 2nd Capacity control cabinet, soft starting cabinet and short circuit cabinet.
1st Capacity control cabinet described in the utility model, the 2nd Capacity control cabinet are connected in series respectively by wire and the 1st high voltage reactor, the 2nd high voltage reactor; In the 1st Capacity control cabinet, be provided with the 1st circuit breaker Q F1, the lower end of the 1st circuit breaker Q F1 is provided with the 2nd current transformer TV2, is provided with the 2nd circuit breaker Q F2 in the 2nd Capacity control cabinet, and the lower end of the 2nd circuit breaker Q F2 is provided with the 3rd current transformer TV3.
That installs side by side in described capacitor box has the 1st high voltage reactor, the 2nd high voltage reactor; 1st high voltage reactor and the 1st fuse and the 1st capacitor are connected in series, and the 1st fuse and the 1st capacitor and the 1st discharge coil are connected in parallel; 2nd high voltage reactor and the 2nd fuse and the 2nd capacitor are connected in series, and the 2nd fuse and the 2nd capacitor and the 2nd discharge coil are connected in parallel.
Described soft starting cabinet, connects bus-bar by wire; Soft starting cabinet mainly comprises the 3rd circuit breaker Q F3, autotransformer T; 3rd circuit breaker Q F3 and autotransformer T is connected in series, and the 6th circuit breaker Q F6 in the line end of autotransformer T and asterism control cubicle is connected in series, and circuit breaker Q F6 and earth connection E is connected in series.
Described short circuit cabinet, connects bus-bar by wire; Short circuit cabinet mainly comprises the 4th circuit breaker Q F4, the 5th circuit breaker Q F5, the 4th current transformer TV4; The 4th described circuit breaker Q F4 and the inlet wire of motor M are connected in series, and what the output line of motor M was connected in series has the 5th current transformer TV5 and earth connection E; What be connected between the 4th circuit breaker with the 4th current transformer TV4 has the 5th circuit breaker Q F5, and the 5th circuit breaker Q F5 is connected with autotransformer T centre tap by wire.
Induction reactance Xb, the induction reactance Xd of the 2nd reactor winding L2 and the impedance Rd of resistance R that have capacitor C, the 1st reactor winding L1 that 220V power firestreak L and zero line N are connected in parallel; Described capacitor C is the sum of the first capacitor C1 in capacitor box and the second capacitor C2; The parallel connection of this circuit local compensation electric capacity, for motor starting provides part reactive current, reduce further grid side electric current.
The beneficial effects of the utility model are: by the mode at side, motor starting loop shunt capacitance, reactive current is provided by electric capacity, make greatly to reduce from the total current of electrical network absorption during motor starting, start rear section electric capacity still to continue as motor running and do local compensation, make power factor during motor running reach more than 0.95, reduce the fluctuation of line voltage further.This device flexible configuration, stable performance, safe and reliable and freedom from repairs.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is described:
Fig. 1 is electrical structure schematic diagram of the present utility model.
Fig. 2 is the motor schematic equivalent circuit of Fig. 1.
Embodiment
Structural implementation of the present utility model, as shown in Figure 1: high-voltage power-line is connected with bus-bar 1 through withdrawable circuit breaker QF0, is provided with the 1st three-phase instrument transformer TV1 in the lower end of withdrawable circuit breaker QF0; What bus-bar 1 connected successively has the 1st Capacity control cabinet 2, the 2nd Capacity control cabinet 3, soft starting cabinet 4 and short circuit cabinet 5.1st Capacity control cabinet 2, the 2nd Capacity control cabinet 3 to be connected with the 1st high voltage reactor L1 in capacitor box 6, the 2nd high voltage reactor L2 downlink connection respectively by wire, in the 1st Capacity control cabinet 2, be provided with the 1st circuit breaker Q F1, the lower end of the 1st circuit breaker Q F1 is provided with the 2nd current transformer TV2; Be provided with the 2nd circuit breaker Q F2 in 2nd Capacity control cabinet 3, the lower end of the 2nd circuit breaker Q F2 is provided with the 3rd current transformer TV3.
That installs side by side in capacitor box 6 has the 1st high voltage reactor L1, the 2nd high voltage reactor L2; 1st high voltage reactor L1 is connected with the 1st fuse RT1 and the 1st capacitor C1, and the 1st fuse RT1 and the 1st capacitor L1 and the 1st discharge coil 7 are connected in parallel; 2nd high voltage reactor L2 connects with the 2nd fuse RT2 and the 2nd capacitor C2 downlink connection, and the 2nd fuse RT2 and the 2nd capacitor C2 and the 2nd discharge coil 7 ' are connected in parallel.
Soft starting cabinet connects bus-bar by wire, and soft starting cabinet mainly comprises the 3rd circuit breaker Q F3, autotransformer T; 3rd circuit breaker Q F3 connects with autotransformer T downlink connection, and the 6th circuit breaker Q F6 in the line end of autotransformer T and asterism control cubicle 8 is connected in series, and circuit breaker Q F6 connects with earth connection E downlink connection.
Short circuit cabinet 5 connects bus-bar 1 by wire, and short circuit cabinet 5 mainly comprises the 4th circuit breaker Q F4, the 5th circuit breaker Q F5, the 4th current transformer TV4; 4th circuit breaker Q F4 connects with the inlet wire of motor M downlink connection, the output line series connection downlink connection of motor M have the 5th current transformer TV5 and earth connection E; What be connected between the 4th circuit breaker with the 4th current transformer TV4 has the 5th circuit breaker Q F5, and the 5th circuit breaker Q F5 is connected with autotransformer T centre tap by wire.According to load request determination autotransformer no-load voltage ratio, when making motor starting, starting current (terminal voltage of motor) is enough large, guarantees that load is started smoothly.
Motor equivalent electric circuit, with reference to accompanying drawing 2, induction reactance Xb, the induction reactance Xd of the 2nd reactor winding L2 and the impedance Rd of resistance R that have capacitor C, the 1st reactor winding L1 that 220V power firestreak L and zero line N are connected in parallel; Described capacitor C is the sum of the first capacitor C1 in capacitor box and the second capacitor C2; The parallel connection of this circuit local compensation electric capacity, for motor starting provides part reactive current, reduce further grid side electric current.
Resistance R represents the resistance on motor internal winding, plays induced field.
Claims (2)
1. a motor compensating formula self coupling soft starter device, comprises withdrawable circuit breaker QF0, instrument transformer TV1, bus-bar, Capacity control cabinet, the second Capacity control cabinet, capacitor box, soft starting cabinet, short circuit cabinet, asterism control cubicle, motor, motor equivalent electric circuit; It is characterized in that: high-voltage power-line is connected with bus-bar through withdrawable circuit breaker QF0, be provided with the 1st three-phase instrument transformer TV1 in the lower end of withdrawable circuit breaker QF0; What bus-bar connected successively has the 1st Capacity control cabinet, the 2nd Capacity control cabinet, soft starting cabinet and short circuit cabinet; 1st Capacity control cabinet, the 2nd Capacity control cabinet are connected in series respectively by wire and the 1st high voltage reactor, the 2nd high voltage reactor;
Be provided with the 1st circuit breaker Q F1 in the 1st described Capacity control cabinet, the lower end of the 1st circuit breaker Q F1 is provided with the 2nd current transformer TV2; Be provided with the 2nd circuit breaker Q F2 in 2nd Capacity control cabinet, the lower end of the 2nd circuit breaker Q F2 is provided with the 3rd current transformer TV3; That installs side by side in capacitor box has the 1st high voltage reactor, the 2nd high voltage reactor, and the 1st high voltage reactor and the 1st fuse and the 1st capacitor are connected in series, and the 1st fuse and the 1st capacitor and the 1st discharge coil are connected in parallel; 2nd high voltage reactor and the 2nd fuse and the 2nd capacitor are connected in series, and the 2nd fuse and the 2nd capacitor and the 2nd discharge coil are connected in parallel;
Described soft starting cabinet connects bus-bar by wire, and soft starting cabinet mainly comprises the 3rd circuit breaker Q F3, autotransformer T; 3rd circuit breaker Q F3 and autotransformer T is connected in series, and the 6th circuit breaker Q F6 in the line end of autotransformer T and asterism control cubicle is connected in series, and circuit breaker Q F6 and earth connection E is connected in series;
Described short circuit cabinet connects bus-bar by wire, and short circuit cabinet mainly comprises the 4th circuit breaker Q F4, the 5th circuit breaker Q F5, the 4th current transformer TV4; The 4th described circuit breaker Q F4 and the inlet wire of motor M are connected in series, and what the output line of motor M was connected in series has the 5th current transformer TV5 and earth connection E; What be connected between the 4th circuit breaker with the 4th current transformer TV4 has the 5th circuit breaker Q F5, and the 5th circuit breaker Q F5 is connected with autotransformer T centre tap by wire.
2. a kind of motor compensating formula self coupling soft starter device according to claim 1, is characterized in that: induction reactance Xb, the induction reactance Xb of the 2nd reactor winding L2 and the impedance Rd of resistance R that have capacitor C, the 1st reactor winding L1 that are connected in parallel on 220V power firestreak L and zero line N; Described capacitor C is the sum of the first capacitor C1 in capacitor box and the second capacitor C2; The parallel connection of circuit local compensation electric capacity, for motor starting provides part reactive current, reduce further grid side electric current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420552407.0U CN204145339U (en) | 2014-09-25 | 2014-09-25 | A kind of compensation self coupling soft starter device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420552407.0U CN204145339U (en) | 2014-09-25 | 2014-09-25 | A kind of compensation self coupling soft starter device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204145339U true CN204145339U (en) | 2015-02-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420552407.0U Expired - Fee Related CN204145339U (en) | 2014-09-25 | 2014-09-25 | A kind of compensation self coupling soft starter device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204145339U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112072958A (en) * | 2019-06-10 | 2020-12-11 | 中科合成油工程有限公司 | Soft start system |
-
2014
- 2014-09-25 CN CN201420552407.0U patent/CN204145339U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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: 20150204 Termination date: 20190925 |