CN203326941U - Large-scale synchronous motor soft start system - Google Patents
Large-scale synchronous motor soft start system Download PDFInfo
- Publication number
- CN203326941U CN203326941U CN2013203815274U CN201320381527U CN203326941U CN 203326941 U CN203326941 U CN 203326941U CN 2013203815274 U CN2013203815274 U CN 2013203815274U CN 201320381527 U CN201320381527 U CN 201320381527U CN 203326941 U CN203326941 U CN 203326941U
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- synchronous motor
- compensation
- breaker
- motor
- synchronous machine
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Abstract
The utility model provides a large-scale synchronous motor soft start system which comprises a soft start system and a dynamic compensation system which are connected in parallel on a high-voltage primary bus. The soft start system comprises a breaker, a synchronous motor and a magnetic control soft starter. An output end of the high-voltage primary bus is connected with an input end of the synchronous motor through the breaker, and an output end of the synchronous motor is respectively connected with the earthed breaker and the earthed magnetic control soft starter. The dynamic compensation system comprises a compensation breaker, an electric reactor, a compensation switch and an inverter circuit. An output end of the high-voltage primary bus is connected with an input end of the electric reactor through the compensation breaker, and an output end of the electric reactor is connected with the earthed inverter circuit through the compensation switch. The large-scale synchronous motor soft start system provided by the utility model has advantages of high degree of automation, reliable and stable operation and high utilization rate of a reactive power compensator. By the adoption of the system, voltage drop can be controlled within a range permitted by a power grid and a motor, and starting requirements of a motor can be met, smooth starting of a motor is realized, and impact on the power grid is reduced.
Description
Technical field
The utility model relates to a kind of Soft Starting System, relates in particular to a kind of Large Synchronous Machine Soft Starting System.
Background technology
Start Large Synchronous Machine and need to meet two conditions:
(1) in the process of synchronous motor starting, pressure drop of grid can not surpass 15%, otherwise affects the normal operation of other electric equipment in same supply line.
(2) should meet the requirement (usually requiring to be greater than 70%) of synchronous motor starting terminal voltage.Otherwise synchronous machine can not start, and causes and starts unsuccessfully.
In the situation of low capacity electrical network, if meet the synchronous motor starting terminal voltage, be greater than 70% condition, but pressure drop of grid can not meet the electrical network requirement all over 15%.If in the situation that guarantee that pressure drop of grid little 15% adopts reduced-voltage starting, starting current times is less like this, but motor terminal voltage only has 40% left and right, can not meet the requirement of electric motor starting, be to realize that Large Synchronous Machine starts so use separately step down start equipment in the low capacity electrical network.
The utility model content
The purpose of this utility model is for problems of the prior art, and a kind of Large Synchronous Machine Soft Starting System is provided.
A kind of Large Synchronous Machine Soft Starting System of the present utility model, comprise the Soft Starting System and the dynamic compensating system that are connected in side by side on high pressure primary side bus; Described Soft Starting System comprises circuit breaker, synchronous machine, magnetic control soft starting device; The output of high pressure primary side bus is connected with the input of synchronous machine by circuit breaker, and the output of synchronous machine is connected with respectively the circuit breaker of ground connection and the magnetic control soft starting device of ground connection; Described dynamic compensating system comprises compensation circuit breaker, reactor, compensating switch, inverter circuit; The output of high pressure primary side bus is connected with the input of reactor by the compensation circuit breaker, and the output of reactor is connected with the inverter circuit of ground connection by compensating switch.
Described magnetic control soft starting device is magnet controlled reactor.
The relative prior art of the utility model has the following advantages:
1, the utility model seals in the step-down soft initiator in the stator loop of synchronous motor, pass through closed-loop control system, adjust the size of controlling direct current in winding, the impedance of magnet controlled reactor descending automatic stepless within predetermined time reduces, the terminal voltage of motor progressively rises to total head, realizes motor constant current soft start.
2, dynamic reactive compensation device of the present utility model is according to the current information of detection system, send offset current, its reactive current can be followed rapidly the variation of reactive load electric current and be changed, and the required reactive power of auto-compensation network system, realize dynamic stepless compensation to power system reactive power.
3, high, the reliable and stable work of the utility model automaticity, the reactive power compensator utilance is high, within pressure drop can being controlled to the scope that electrical network and motor allow, meets the needs of motor starting, realized the motor smooth starting, reduced electrical network is impacted.
The accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, a kind of Large Synchronous Machine Soft Starting System of the present utility model is described in further detail.
A kind of Large Synchronous Machine Soft Starting System as shown in Figure 1, comprise the Soft Starting System and the dynamic compensating system 5 that are connected in side by side on high pressure primary side bus 7; Described Soft Starting System comprises circuit breaker 1, synchronous machine 6, magnetic control soft starting device, and the magnetic control soft starting device is magnet controlled reactor 9; The output of high pressure primary side bus 7 is connected with the input of synchronous machine 6 by circuit breaker 1, and the output of synchronous machine 6 is connected with respectively the circuit breaker 8 of ground connection and the magnetic control soft starting device of ground connection; Described dynamic compensating system 5 comprises compensation circuit breaker 4, reactor 10, compensating switch 11, inverter circuit 12; The output of high pressure primary side bus 7 is connected with the input of reactor 10 by compensation circuit breaker 4, and the output of reactor 10 is connected with the inverter circuit 12 of ground connection by compensating switch 11.
The magnetic control soft starting device is connected with the output of synchronous machine 6 by step-down soft-start cabinet 2; Earthing breaker 8 is connected with the output of synchronous machine 6 by soft start asterism cabinet 3; Circuit breaker 1 is connected with the output of high pressure primary side bus 7 by the motor incoming line cabinet; Compensation circuit breaker 4 is connected with the output of high pressure primary side bus 7 by compensation arrangement incoming line cabinet 13.
Before synchronous machine 6 is driven, compensation circuit breaker 4 and dynamic compensating system 5 close a floodgate, and dynamic compensating system 5 puts into operation.During startup, after the motor incoming line cabinet closes a floodgate, step-down soft-start cabinet 2 is started working, and makes synchronous machine 6 starting currents remain constant, guarantees maximum detent torque, realizes soft start.When synchronous machine 6 stator currents are less than the rated current of 1 times, step-down soft-start cabinet 2 sends throws the total head signal, and soft start asterism cabinet 3 is closed a floodgate, proceed-to-send, and step-down soft-start cabinet 2 is cut; In synchronous machine 6 reduced-voltage starting processes, dynamic compensating system 5, according to the current information of detection system, sends offset current.Its reactive current can be followed rapidly the variation of reactive load electric current and be changed, and the required reactive power of auto-compensation network system, realize dynamic stepless compensation to power system reactive power.
Claims (2)
1. a Large Synchronous Machine Soft Starting System, is characterized in that: comprise the Soft Starting System and the dynamic compensating system (5) that are connected in side by side on high pressure primary side bus (7); Described Soft Starting System comprises circuit breaker (1), synchronous machine (6), magnetic control soft starting device; The output of high pressure primary side bus (7) is connected with the input of synchronous machine (6) by circuit breaker (1), and the output of synchronous machine (6) is connected with respectively the circuit breaker (8) of ground connection and the magnetic control soft starting device of ground connection; Described dynamic compensating system (5) comprises compensation circuit breaker (4), reactor (10), compensating switch (11), inverter circuit (12); The output of high pressure primary side bus (7) is connected with the input of reactor (10) by compensation circuit breaker (4), and the output of reactor (10) is connected with the inverter circuit (12) of ground connection by compensating switch (11).
2. a kind of Large Synchronous Machine Soft Starting System as claimed in claim 1, it is characterized in that: described magnetic control soft starting device is magnet controlled reactor (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203815274U CN203326941U (en) | 2013-06-30 | 2013-06-30 | Large-scale synchronous motor soft start system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203815274U CN203326941U (en) | 2013-06-30 | 2013-06-30 | Large-scale synchronous motor soft start system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203326941U true CN203326941U (en) | 2013-12-04 |
Family
ID=49666232
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013203815274U Expired - Fee Related CN203326941U (en) | 2013-06-30 | 2013-06-30 | Large-scale synchronous motor soft start system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203326941U (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 |
-
2013
- 2013-06-30 CN CN2013203815274U patent/CN203326941U/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 |
Granted publication date: 20131204 Termination date: 20190630 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |