CN202196154U - Double-fed motor testing system and testing method thereof - Google Patents
Double-fed motor testing system and testing method thereof Download PDFInfo
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- CN202196154U CN202196154U CN2011202945869U CN201120294586U CN202196154U CN 202196154 U CN202196154 U CN 202196154U CN 2011202945869 U CN2011202945869 U CN 2011202945869U CN 201120294586 U CN201120294586 U CN 201120294586U CN 202196154 U CN202196154 U CN 202196154U
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Abstract
The utility model discloses a double-fed motor testing system and a testing method thereof. The system includes a generator unit, an electric motor unit and a system starting unit, wherein the generator unit includes a motor A and a double-fed frequency converter A; the electric motor unit includes a motor B and a double-fed frequency converter B; the system starting unit includes a stator short circuit contactor A and a stator short circuit contactor B; and both the motor A and the motor B are double-fed motors with the same specification model and are in rigid connection through a coupler. The method includes a stator short circuit rotor variable frequency operation mode and a double-fed operation mode. In the utility model, a stator of a test-assistant motor adopts short circuit, a rotor is controlled through the double-fed frequency converter, so that the self-starting of an opposite-towed system is realized, and the problem that the double-fed motor can not be started due to the narrow speed regulation range during the double-fed operation caused by limitation to output voltage of the rotors of the double-fed motors is solved. Through changing the control method of the double-fed motor, the system is started and operates at low speed, thereby greatly saving the testing cost.
Description
Technical field
The utility model relates to the closed torque testing system of a kind of electric power, especially a kind of double feedback electric engine test macro.
Background technology
Motor is one of most important equipment in the wind-powered electricity generation unit, and it has not only determined the generating quality of power supply of whole unit, and influences the serviceable life of blower fan.Therefore before the blower fan general assembly, must test to motor each item performance, comprising load testing, temperature rise test, variable speed constant frequency test etc.In order to satisfy the performance test of double feedback electric engine, just need design a cover and can simulate wind energy and be directed against double feedback electric engine under different rotating speeds, it is applied the test platform of different torques.
Present testing scheme is to adopt the total power frequency conversion speed-adjusting system to test, and as shown in Figure 1, being tried motor is double feedback electric engine, is tried the rotor current of motor through the double-fed Frequency Converter Control, and it is operated under the double-fed generating operation mode; Accompanying the examination motor is asynchronous squirrel-cage motor, drives through the total power frequency converter, and it is operated under the electric model.Tried motor and accompany the examination motor to be connected by shaft, though this scheme is simple in structure, the rotational speed regulation wide ranges, had following problem: accompany the examination motor to need the total power frequency converter to drive, the equipment cost height; Because accompanying the examination motor is asynchronous squirrel-cage motor, specifications and models under the prerequisite of not changing frock, can only be tested a double feedback electric engine with different by the examination motor at every turn, and test fixture is complicated, influences testing efficiency.
So-called double feedback electric engine drag control; Be that the double feedback electric engine stator is incorporated into the power networks; Promptly continuous with electrical network, realize motor stator and rotor while and electrical network exchange electric energy through regulating the rotor excitation, its power consumption or feed are determined by rotating speed: stator rotor while feed during greater than synchronous rotational speed; Stator feed rotor power consumption during less than synchronous rotational speed.The speed of being incorporated into the power networks of double feedback electric engine can not be very low, this be because when double feedback electric engine slippage when rotating speed is very low big, cause double fed electric machine rotor voltage very high, existing double-fed frequency converter is difficult to realization.
Chinese patent ZL200610021181.1 discloses other a kind of method that is used for gearbox testboard of wind-driven generator set; This method is in order to solve the problem of operation under the double feedback electric engine slow-speed of revolution; Except that by the examination motor with accompany the examination motor, additional configuration a starter motor realize that double feedback electric engine is to dragging control.This just makes that the total system configuration is lengthy and tedious, and equipment cost increases.
Therefore develop that a kind of cost is low, easy to use, the succinct double feedback electric engine test macro of configuration is very necessary.
Summary of the invention
For solving the problems referred to above that prior art exists, the utility model will design the double feedback electric engine test macro that a kind of cost is low, easy to use, configuration is succinct.
To achieve these goals; The technical scheme of the utility model is following: a kind of double feedback electric engine test macro; Comprise generator unit, motor unit and system start-up unit; Described generator unit comprises motor A and double-fed frequency converter A, and described motor unit comprises motor B and double-fed frequency converter B, and said system start-up unit comprises stator short circuit contactor A and stator short circuit contactor B; Described motor A and motor B be the same specification model double feedback electric engine, be rigidly connected through shaft coupling; Described motor A connects and constitutes loop with double-fed frequency converter A, double-fed frequency converter front end contactor A and the double feedback electric engine contactor A that is incorporated into the power networks successively, and described stator short circuit contactor A is connected motor A and double feedback electric engine and is incorporated into the power networks on the cable between the contactor A; Described motor B connects and constitutes loop with double-fed frequency converter B, double-fed frequency converter front end contactor B and the double feedback electric engine contactor B that is incorporated into the power networks successively, and described stator short circuit contactor B is connected motor B and double feedback electric engine and is incorporated into the power networks on the cable between the contactor B; Pressure regulator is connected with motor unit with generator unit respectively.
Described motor unit of the utility model and generator unit are formed the electric power closed system of symmetry.
Compared with prior art, the utlity model has following beneficial effect:
1, the utility model will be accompanied the stator short circuit of examination motor, and rotor is realized dragging the self-starting of system through the double-fed Frequency Converter Control.Solved because the restriction of double fed electric machine rotor output voltage, the narrow problem that can't start of causing of speed adjustable range when making the double-fed operation.
2, the utility model is realized the speed and the power adjustments of system through regulating the exciting current that double-fed frequency converter A and double-fed frequency converter B are exported to motor A and motor B rotor respectively, accomplishes the motor load test.Though motor speed adjustable range in the double-fed operational process is little, can realize the simulation to wind energy, satisfies the demand of double feedback electric engine load testing.
3, with background technology in the method that is used for gearbox testboard of wind-driven generator set mentioned compare; The utility model need not extra starter motor; Only adopt one to be accompanied the examination motor by examination motor and one; Through changing startup and the slow running that the double feedback electric engine control method realizes system, practiced thrift testing cost greatly.
4, because the examination motor of accompanying of the utility model adopts the double-fed frequency converter to drag, need not adopt the total power frequency converter, practice thrift cost.
5, the quilt of the utility model tries side and accompanies the examination side all to adopt double feedback electric engine, under the situation of not changing frock, can realize being tried motor and the exchange of accompanying the examination motor, the raising testing efficiency.
6, the utility model does not use extra dragging motor can realize startup and the slow running of double-fed to dragging system.
Description of drawings
3 in the total accompanying drawing of the utility model, wherein:
Fig. 1 is the single line schematic diagram of total power frequency conversion system.
Fig. 2 is the single line schematic diagram that the utility model adopts.
Fig. 3 is the electrical configurations sketch among the utility model embodiment.
Among the figure: 1, motor A, 2, motor B, 3, the double-fed frequency converter A; 4, double-fed frequency converter B, 5, double-fed frequency converter front end contactor A, 6, the double feedback electric engine contactor A that is incorporated into the power networks; 7, stator short circuit contactor A; 8, double-fed frequency converter front end contactor B, 9, the double feedback electric engine contactor B that is incorporated into the power networks, 10, stator short circuit contactor B.
Embodiment
Below in conjunction with accompanying drawing and an embodiment the utility model is described further.As shown in Figure 2; A kind of double feedback electric engine test macro; Comprise generator unit, motor unit and system start-up unit; Described generator unit comprises motor A1 and double-fed frequency converter A 3, and described motor unit comprises motor B2 and double-fed frequency converter B 4, and said system start-up unit comprises stator short circuit contactor A7 and stator short circuit contactor B10; Described motor A1 and motor B2 be the same specification model double feedback electric engine, be rigidly connected through shaft coupling; Described motor A1 connects and constitutes loop with double-fed frequency converter A 3, double-fed frequency converter front end contactor A5 and the double feedback electric engine contactor A6 that is incorporated into the power networks successively, and described stator short circuit contactor A7 is connected motor A1 and double feedback electric engine and is incorporated into the power networks on the cable between the contactor A6; Described motor B2 connects and constitutes loop with double-fed frequency converter B 4, double-fed frequency converter front end contactor B8 and the double feedback electric engine contactor B9 that is incorporated into the power networks successively, and described stator short circuit contactor B10 is connected motor B2 and double feedback electric engine and is incorporated into the power networks on the cable between the contactor B9; Pressure regulator is connected with motor unit with generator unit respectively.Described motor unit and generator unit are formed the electric power closed system of symmetry.
The method of testing of the utility model may further comprise the steps:
A, stator short circuit rotor-side variable frequency operational mode: stator short circuit contactor B10 is connected; The stator that makes motor B2 is by short circuit; Double-fed frequency converter B 4 links to each other with the rotor winding of motor B2 as a total power frequency converter; Directly drive motor B2 does asynchronous operation, realizes that motor B2 is from static stepless speed regulation in the synchronous rotational speed scope; In the start-up course, double-fed frequency converter B 4 adopts constant voltage and frequency ratio control, guarantees starting moment and limits dash current, realizes dragging the level and smooth startup of system;
B, double-fed operational mode: when the system of dragging is arrived and net spee after; Stator short circuit contactor B10 is broken off the rotor current of double-fed frequency converter A 3 control motor A1, the rotor current of double-fed frequency converter B 4 control motor B2; The stator of motor A1 and motor B2 is sent with electrical network frequency together, with pressure, synchronous electric energy; Satisfying is incorporated into the power networks require after, make double feedback electric engine contactor A6 and the double feedback electric engine contactor B9 that is incorporated into the power networks that is incorporated into the power networks connect successively, motor A1 and motor B2 are operated under the double-fed operational mode.
Described and the net spee of the utility model is generally 70%～90% of synchronous rotational speed.
As shown in Figure 3, motor A1 is as being made generator operation by the examination motor, and motor B2 is as accompanying the examination motor to make electric operation.Motor A1 and motor B2 capacity are 1520KW, and the stator rated voltage is 690V, and the stator rated current is 1060A; The stator rated frequency is 50Hz, and the rotor open-circuit voltage is 2100V, and the working rotor frequency is 0～20Hz; The motor synchronous rotating speed is 1500RPM, and rated speed is 1800RPM.
Before carrying out electromechanical testing, need be connected by shaft through the motor output shaft of shaft coupling with motor A1 and motor B2.When testing, at first QF is connected, system works voltage is stabilized in 690V, double-fed frequency converter front end contactor A5, double-fed frequency converter front end contactor B8 and stator short circuit contactor B10 are connected through pressure regulator.The motor B2 stator winding that accompany examination this moment is by short circuit, and double-fed frequency converter double-fed frequency converter B 4 is regulated the input current of motor B2 rotor, and directly drive motor B2 does the Asynchronous Frequency-variable operation and adopts constant voltage and frequency ratio control.When rotating speed arrives 1300RPM and net spee, stator short circuit contactor B10 to be broken off, double-fed frequency converter B 4 is by rotor-side variable frequency mode switch to double-fed operational mode.Double-fed frequency converter B 4 feeds exciting current to motor B2 rotor winding, and detects the generating energy data voltage, frequency, phase place etc. of motor B2 stator winding.When motor B2 stator winding generating energy data with the electric network data coupling and satisfy when being incorporated into the power networks condition, connect the switch stator short circuit contactor A7 that is incorporated into the power networks, this moment, motor B2 operated in also under the net state.
After the motor B2 stable operation, double-fed frequency converter A 3 feeds exciting current to motor A1 rotor winding, and detects the generating energy data of motor A1 stator winding.After satisfying the condition that is incorporated into the power networks, connect the switch double-fed frequency converter front end contactor B8 that is incorporated into the power networks, make motor A1 operate in and net state under.This moment, motor A1 and motor B2 were operated under the double-fed operational mode simultaneously; Through regulating the output current of double-fed frequency converter A 3 and double-fed frequency converter B 4; Running speed that can Adjustment System and the generated output of motor A1; And can be according to the test needs, the power factor of Adjustment System operation satisfies the double feedback electric engine test request.
Electrical system need detect the electric parameters such as output power, motor A1 and motor B2 stator rotor current/voltage of rotating speed, motor A1 and the motor B2 of motor A1 and motor B2; And through the participation of the torque rotary speed controlling models in main control unit computing; Make total system stable, can reach the preferable performance index.
Claims (2)
1. double feedback electric engine test macro; Comprise generator unit, motor unit and system start-up unit; It is characterized in that: described generator unit comprises motor A (1) and double-fed frequency converter A (3); Described motor unit comprises motor B (2) and double-fed frequency converter B (4), and said system start-up unit comprises stator short circuit contactor A (7) and stator short circuit contactor B (10); Described motor A (1) and motor B (2) be the same specification model double feedback electric engine, be rigidly connected through shaft coupling; Described motor A (1) connects and constitutes loop with double-fed frequency converter A (3), double-fed frequency converter front end contactor A (5) and the double feedback electric engine contactor A (6) that is incorporated into the power networks successively, and described stator short circuit contactor A (7) is connected motor A (1) and double feedback electric engine and is incorporated into the power networks on the cable between the contactor A (6); Described motor B (2) connects and constitutes loop with double-fed frequency converter B (4), double-fed frequency converter front end contactor B (8) and the double feedback electric engine contactor B (9) that is incorporated into the power networks successively, and described stator short circuit contactor B (10) is connected motor B (2) and double feedback electric engine and is incorporated into the power networks on the cable between the contactor B (9); Pressure regulator is connected with motor unit with generator unit respectively.
2. a kind of double feedback electric engine test macro according to claim 1 is characterized in that: described motor unit and generator unit are formed the electric power closed system of symmetry.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202945869U CN202196154U (en) | 2011-08-12 | 2011-08-12 | Double-fed motor testing system and testing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202945869U CN202196154U (en) | 2011-08-12 | 2011-08-12 | Double-fed motor testing system and testing method thereof |
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| CN202196154U true CN202196154U (en) | 2012-04-18 |
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| CN2011202945869U Expired - Fee Related CN202196154U (en) | 2011-08-12 | 2011-08-12 | Double-fed motor testing system and testing method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102288913A (en) * | 2011-08-12 | 2011-12-21 | 大连华锐股份有限公司 | Testing system for double-fed motor and testing method thereof |
| CN106199428A (en) * | 2016-07-08 | 2016-12-07 | 兰州电机股份有限公司 | High-power double feed wind power generator pilot system and TT&C system thereof |
-
2011
- 2011-08-12 CN CN2011202945869U patent/CN202196154U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102288913A (en) * | 2011-08-12 | 2011-12-21 | 大连华锐股份有限公司 | Testing system for double-fed motor and testing method thereof |
| CN102288913B (en) * | 2011-08-12 | 2013-04-03 | 大连华锐重工集团股份有限公司 | Testing system for double-fed motor and testing method thereof |
| CN106199428A (en) * | 2016-07-08 | 2016-12-07 | 兰州电机股份有限公司 | High-power double feed wind power generator pilot system and TT&C system thereof |
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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: DALIAN HUARUI HEAVY INDUSTRY GROUP CO., LTD. Free format text: FORMER OWNER: HUARUI CO., LTD., DALIAN Effective date: 20120419 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20120419 Address after: 116013 No. 169 Bayi Road, Xigang District Patentee after: Dalian Huarui Heavy Industry Group Co., Ltd. Address before: 116013 Bayi Road, Xigang District, Liaoning, China, No. 169, No. Patentee before: Huarui Co., Ltd., Dalian |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120418 Termination date: 20130812 |