CN102237843A - High-performance variable frequency speed regulation method of high-voltage winding asynchronous motor rotor - Google Patents
High-performance variable frequency speed regulation method of high-voltage winding asynchronous motor rotor Download PDFInfo
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Abstract
The invention provides a high-performance variable frequency speed regulation method of a high-voltage winding asynchronous motor rotor, belonging to a high-voltage high-power variable frequency speed regulation method. In the method, three-phase windings of the high-voltage winding asynchronous motor rotor are subjected to short circuit and connected with a frequency converter with corresponding voltage levels; a double-closed-loop control strategy is adopted in a stator field direction vector control system without a velocity sensor, wherein an inner control loop comprises a rotor current loop and an outer control loop comprises a stator magnetic link loop and a revolving speed loop; and signals output by the inner control loop are sent to an SVPWM (space vector pulse width modulation) algorithm to generate PWM (pulse-width modulation) pulses which are used for switching on and off a power device in the inversion part of the frequency converter, thereby controlling the variable frequency speed regulation of a high-voltage winding asynchronous motor. The method provided by the invention has the advantage that the high-performance stator field direction vector control strategy without the velocity sensor is adopted, so that the level of the voltage which is borne by the power device required by the frequency inverter is reduced in a high-voltage occasion, thus decreasing the system cost and improving the dynamic and static performances and the revolving speed accuracy of the speed regulation system.
Description
Technical field
The present invention relates to a kind of high-power frequency Varying and speed changing method, especially relate to a kind of high-tension winding asynchronous machine rotor high performance variable frequency speed regulation method.
Background technology
In China, the high-tension winding asynchronous machine has been widely used in industrial occasions such as coal, electric power, metallurgy, chemical industry, has improved industrial production efficient.At present, high-tension winding asynchronous motor drive mode mainly contains rotor resistance speed governing, tandem control, high pressure soft starting, high-pressure frequency-conversion etc.Problems such as first three plants that control mode exists all that adjusting speed accuracy is low, bad dynamic performance, energy consumption are big.Compare first three and plant control mode, high-voltage frequency conversion and speed-adjusting mode adjusting speed accuracy height, energy consumption are little, but its technical difficulty is higher, and power demand device withstand voltage value height, equipment complexity, cost height in the frequency converter, the speed governing of only suitable blower fan, pump apparatus.
Recently, a kind of new high-tension winding asynchronous machine rotor frequency Varying and speed changing method is suggested.This method is with high-tension winding asynchronous machine stator winding short circuit, and the rotor winding connects relevant voltage grade frequency converter.Carry out excitation by the rotor winding, the rotating magnetic field cutting stator winding of generation produces induced electromotive force and induced current in stator winding, rotating magnetic field and induced current interact, produce electromagnetic torque, drive the rotor rotation, and then realize the frequency control of high-tension winding asynchronous machine.The advantage of this method is to adopt the alternative high voltage converter of mesolow frequency converter that the high-tension winding asynchronous machine is carried out frequency control, has reduced the withstand voltage of power demand device in the frequency converter.But this method adopts common open loop V/F control, and the electric machine speed regulation dynamic and static state performance is poor, is not suitable for the high performance variable frequency speed regulation occasion.
Summary of the invention
The present invention be directed to existing high-tension winding variable frequency speed modulation of asynchronous motor system adopt common open loop V/F control, electric machine speed regulation dynamic and static state performance poor, be not suitable for problem such as high performance variable frequency speed regulation occasion, a kind of high-tension winding asynchronous machine rotor high performance variable frequency speed regulation method is provided.
The present invention seeks to provide a kind of high-tension winding asynchronous machine rotor high performance variable frequency speed regulation method, this method is that the rotor three-phase winding connects the frequency converter of relevant voltage grade with high-tension winding asynchronous machine three-phase stator winding short circuit; Adopt Speedless sensor stator flux orientation vector control technology, the vector control system of this technology adopts two closed-loop control strategies, and the inner control ring is the rotor current ring, and outer control ring is stator magnet chain link and der Geschwindigkeitkreis; The signal of inner control ring is delivered in the SVPWM algorithm, produced pwm pulse, the opening and turn-offing of control of conversion device inversion part power device, and then control high-tension winding asynchronous machine carries out frequency control; Concrete steps are as follows:
Step 4, the rotor voltage signal under the two-phase rest frame that obtains in the DC bus-bar voltage signal that detects in the step 2, the step 3 is delivered in the SVPWM algorithm, produce pwm pulse, in order to the opening and turn-offing of control of conversion device inversion part power device, and then control high-tension winding asynchronous machine carries out frequency control.
Beneficial effect: owing to adopted Speedless sensor stator flux orientation vector control technology, this scheme has realized the decoupling zero of rotor current, can accurately control stator magnetic linkage and torque respectively; Speed closed loop control makes motor actual speed tracing preset rotating speed well; Speedless sensor has then solved shaft encoder problems such as difficult, that maintenance is big has been installed.Compare the high-tension winding asynchronous machine rotor frequency conversion speed-adjusting system that adopts open loop V/F control mode, governing system dynamic and static state performance in this programme is better, the rotating speed control precision is higher and reduced system cost, impels the high-tension winding asynchronous machine to be applied to high-performance speed governing occasion.
Advantage: high-tension winding asynchronous machine rotor high performance variable frequency speed regulation method of the present invention has been used high performance Speedless sensor stator flux orientation vector control strategy, the electric pressure of bearing at high pressure occasion low-converter power demand device reduces, reduced system cost, improve the dynamic and static state performance and the rotary speed precision of governing system, impelled the high-tension winding asynchronous machine to be applied to high-performance speed governing occasion.
Description of drawings
Fig. 1 is a systematic schematic diagram of the present invention.
Fig. 2 is motor of the present invention section rotating speed identification effect figure at full speed.
Fig. 3 is motor accelerating sections rotating speed identification effect figure of the present invention.
Fig. 4 is at the uniform velocity section rotating speed identification effect figure of motor of the present invention.
Fig. 5 is a motor of the present invention section stator flux observer design sketch at full speed.
Fig. 6 is a motor of the present invention section torque control design sketch at full speed.
Specific embodiments
The present invention will be further described below in conjunction with the embodiment in the accompanying drawing:
Embodiment 1: in Fig. 1, technical scheme of the present invention is: with high-tension winding asynchronous machine three-phase stator winding short circuit, the rotor three-phase winding connects the frequency converter of relevant voltage grade.Frequency converter adopts Speedless sensor stator flux orientation vector control technology.Vector control system adopts two closed-loop control strategies, and outer shroud is stator magnet chain link, der Geschwindigkeitkreis, and interior ring is the rotor current ring.Utilize a voltage transformer to detect frequency changer direct current bus voltage, carry out voltage reconstruct in conjunction with frequency converter inversion part threephase switch tubulose attitude and obtain rotor three-phase voltage; Utilize two current transformer detection rotor biphase currents; Rotor three-phase voltage and biphase current are delivered to flux observer, rotating speed estimator after the Clark conversion, obtain stator flux observer value, rotating speed estimated value; The stator flux observer value is fed back in the magnetic linkage adjuster, form the stator magnetic linkage closed loop; The rotating speed estimated value is fed back in the speed regulator, form speed closed loop; With the rotor biphase current through feed back to after Clark and the Park conversion current regulator, in, form the rotor current closed loop.The current regulator output valve is carried out feedforward compensation and the anti-Park conversion of process, obtain the rotor voltage signal under the two-phase rest frame, itself and DC bus-bar voltage signal are delivered in the SVPWM algorithm, produce pwm pulse, in order to the opening and turn-offing of control of conversion device inversion part power device, and then control high-tension winding asynchronous machine carries out frequency control.Compare with the high-tension winding asynchronous machine rotor frequency conversion speed-adjusting system that adopts open loop V/F control mode, the governing system dynamic and static state performance in this programme is better, the rotating speed control precision is higher and reduced system cost.Concrete steps are as follows:
Step 4, with the DC bus-bar voltage signal that detects in the step 2
u Dc, the rotor voltage signal under the two-phase rest frame that obtains in the step 3, deliver in the SVPWM algorithm, produce pwm pulse, in order to the opening and turn-offing of control of conversion device inversion part power device, and then control high-tension winding asynchronous machine carries out frequency control.
Claims (1)
1. high-tension winding asynchronous machine rotor high performance variable frequency speed regulation method, it is characterized in that: this method is that the rotor three-phase winding connects the frequency converter of relevant voltage grade with high-tension winding asynchronous machine three-phase stator winding short circuit; Adopt Speedless sensor stator flux orientation vector control technology, the vector control system of this technology adopts two closed-loop control strategies, and the inner control ring is the rotor current ring, and outer control ring is stator magnet chain link and der Geschwindigkeitkreis; The signal of inner control ring is delivered in the SVPWM algorithm, produced pwm pulse, the opening and turn-offing of control of conversion device inversion part power device, and then control high-tension winding asynchronous machine carries out frequency control; Concrete steps are as follows:
Step 1, with high-tension winding asynchronous machine three-phase stator winding short circuit, the rotor three-phase winding connects the frequency converter of relevant voltage grade;
Step 2, voltage transformer of employing detect frequency changer direct current bus voltage, carry out voltage reconstruct in conjunction with frequency converter inversion part threephase switch tubulose attitude, obtain the rotor three-phase voltage signal; Adopt two current transformers to detect the rotor biphase current; Rotor three-phase voltage signal and rotor biphase current signal are delivered to after the Clark conversion in flux observer, the rotating speed estimator model, obtain stator flux observer value, rotating speed estimated value, feed back to respectively in magnetic linkage adjuster, the speed regulator, form stator magnetic linkage closed loop, speed closed loop; Magnetic linkage adjuster, speed regulator output are respectively rotor current excitation component set-point, rotor current torque component set-point;
Step 3, with the rotor biphase current that detects in the step 2, be transformed to rotor current signal under the two-phase synchronous rotating frame through Clark and Park, feed back in the current regulator, form the rotor current closed loop; Rotor voltage signal under the current regulator output two-phase synchronous rotating frame adds feedforward compensation and is transformed to rotor voltage signal under the two-phase rest frame by anti-Park;
Step 4, the rotor voltage signal under the two-phase rest frame that obtains in the DC bus-bar voltage signal that detects in the step 2, the step 3 is delivered in the SVPWM algorithm, produce pwm pulse, in order to the opening and turn-offing of control of conversion device inversion part power device, and then control high-tension winding asynchronous machine carries out frequency control.
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102540963A (en) * | 2012-03-16 | 2012-07-04 | 中国重型机械研究院有限公司 | Dynamic torque compensation method for large-inertia rotor |
| CN103470483A (en) * | 2013-09-10 | 2013-12-25 | 广东美芝制冷设备有限公司 | Control method and system of compressor |
| CN103647491A (en) * | 2013-11-30 | 2014-03-19 | 许继电气股份有限公司 | Stator field orientation vector control device and angle compensation method thereof |
| CN103731082A (en) * | 2014-01-03 | 2014-04-16 | 东南大学 | Stator flux linkage estimation method of permanent magnet synchronous motor based on direct torque control |
| CN104935234A (en) * | 2015-06-16 | 2015-09-23 | 河北工业大学 | Voltage vector setting method for variable frequency speed control of high frequency spindle |
| CN106712629A (en) * | 2016-12-15 | 2017-05-24 | 宁波央腾汽车电子有限公司 | Current control method for permanent magnet synchronous motor |
| CN107888122A (en) * | 2017-10-31 | 2018-04-06 | 广东明阳龙源电力电子有限公司 | A kind of vector control system and its strategy process for high voltage converter |
| CN110112743A (en) * | 2019-04-04 | 2019-08-09 | 上海电力学院 | A kind of isolated form variable-frequency transformer and its starting control and expansion method |
| CN110474362A (en) * | 2019-07-11 | 2019-11-19 | 广东明阳龙源电力电子有限公司 | A kind of low voltage ride through control method and system for high-voltage large-capacity frequency converter |
| CN111224603A (en) * | 2020-02-21 | 2020-06-02 | 珠海格力电器股份有限公司 | Compressor direct torque control method and device, compressor device and air conditioning equipment |
| CN111371360A (en) * | 2020-04-15 | 2020-07-03 | 商飞信息科技（上海）有限公司 | Three-phase squirrel-cage asynchronous motor control method based on anti-interference observer |
| CN111669087A (en) * | 2019-03-08 | 2020-09-15 | 中车大连电力牵引研发中心有限公司 | Asynchronous motor power generation control method and equipment |
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Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102540963A (en) * | 2012-03-16 | 2012-07-04 | 中国重型机械研究院有限公司 | Dynamic torque compensation method for large-inertia rotor |
| CN103470483A (en) * | 2013-09-10 | 2013-12-25 | 广东美芝制冷设备有限公司 | Control method and system of compressor |
| CN103470483B (en) * | 2013-09-10 | 2016-01-06 | 广东美芝制冷设备有限公司 | The controlling method of compressor and control system |
| CN103647491A (en) * | 2013-11-30 | 2014-03-19 | 许继电气股份有限公司 | Stator field orientation vector control device and angle compensation method thereof |
| CN103731082A (en) * | 2014-01-03 | 2014-04-16 | 东南大学 | Stator flux linkage estimation method of permanent magnet synchronous motor based on direct torque control |
| CN103731082B (en) * | 2014-01-03 | 2016-05-18 | 东南大学 | A kind of permanent-magnetic synchronous motor stator magnetic linkage method of estimation based on Direct Torque Control |
| CN104935234A (en) * | 2015-06-16 | 2015-09-23 | 河北工业大学 | Voltage vector setting method for variable frequency speed control of high frequency spindle |
| CN104935234B (en) * | 2015-06-16 | 2017-04-26 | 河北工业大学 | Voltage vector setting method for variable frequency speed control of high frequency spindle |
| CN106712629B (en) * | 2016-12-15 | 2019-06-11 | 宁波央腾汽车电子有限公司 | A kind of current control method of permanent magnet synchronous motor |
| CN106712629A (en) * | 2016-12-15 | 2017-05-24 | 宁波央腾汽车电子有限公司 | Current control method for permanent magnet synchronous motor |
| CN107888122A (en) * | 2017-10-31 | 2018-04-06 | 广东明阳龙源电力电子有限公司 | A kind of vector control system and its strategy process for high voltage converter |
| CN111669087A (en) * | 2019-03-08 | 2020-09-15 | 中车大连电力牵引研发中心有限公司 | Asynchronous motor power generation control method and equipment |
| CN111669087B (en) * | 2019-03-08 | 2022-09-23 | 中车大连电力牵引研发中心有限公司 | Asynchronous motor power generation control method and equipment |
| CN110112743A (en) * | 2019-04-04 | 2019-08-09 | 上海电力学院 | A kind of isolated form variable-frequency transformer and its starting control and expansion method |
| CN110112743B (en) * | 2019-04-04 | 2023-04-28 | 上海电力学院 | Isolation type variable frequency transformer and starting control and capacity expansion method thereof |
| CN110474362A (en) * | 2019-07-11 | 2019-11-19 | 广东明阳龙源电力电子有限公司 | A kind of low voltage ride through control method and system for high-voltage large-capacity frequency converter |
| CN110474362B (en) * | 2019-07-11 | 2023-08-25 | 广东明阳龙源电力电子有限公司 | Low-voltage ride through control method and system for high-voltage high-capacity frequency converter |
| CN111224603A (en) * | 2020-02-21 | 2020-06-02 | 珠海格力电器股份有限公司 | Compressor direct torque control method and device, compressor device and air conditioning equipment |
| CN111224603B (en) * | 2020-02-21 | 2021-09-14 | 珠海格力电器股份有限公司 | Compressor direct torque control method and device, compressor device and air conditioning equipment |
| CN111371360A (en) * | 2020-04-15 | 2020-07-03 | 商飞信息科技（上海）有限公司 | Three-phase squirrel-cage asynchronous motor control method based on anti-interference observer |
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Application publication date: 20111109 |