CN104113265A - Redundancy four-quadrant brushless double-fed motor speed regulation system allowing smooth handoff - Google Patents
Redundancy four-quadrant brushless double-fed motor speed regulation system allowing smooth handoff Download PDFInfo
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Abstract
The invention provides a redundancy four-quadrant brushless double-fed motor speed regulation system allowing smooth handoff. The system comprises a brushless double-fed motor connected with an alternating current grid, a mechanical load, a pulse width modulation (PWM) converter device of a double-table back-to-back type structure, a converter controller of the converter device, a double-sleeve current detection module, a direct current voltage detection module and a grid voltage detection module and further comprises a main controller man-machine interaction interface. The mechanical load, the PWM converter device and the converter controller are connected with a rotating shaft of the brushless double-fed motor. The system has the advantage that a converter current distribution scheme can be transmitted by the main controller man-machine interaction interface through a communication port and can also be achieved through converters through compromise settlement to form the back-to-back type PWM converter device of the redundancy structure dynamically in real time. Given current values of the converters in the device can be dynamically distributed according to the working state, the fault condition and the overhauling requirement of the converters, and smooth handoff and high reliability operation between different operation states are achieved.
Description
Technical field
The present invention relates to brushless dual-feed motor governing system, particularly a kind of redundancy-type four-quadrant brushless dual-feed motor governing system taking over seamlessly.
Background technology
Brushless dual-feed motor have speed governing flexibly, can four quadrant running and the advantage such as power inverter capacity is lower, and there is not the maintenance issues of brush and slip ring, have broad application prospects.The large capacity future development of brushless dual-feed motor governing system forward mesohigh, once there is sudden shutdown, will cause huge economic loss.At present, the weakest part of brushless dual-feed motor governing system is the reliability of back-to-back PWM converter, once a certain power device breaks down in current transformer, sudden shutdown must occur system, is difficult to realize the high reliability operation of governing system.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art part, a kind of redundancy-type four-quadrant brushless dual-feed motor governing system taking over seamlessly is provided, the PWM convertor assembly of formula back-to-back and the corresponding hierarchy of control by employing with redundancy structure, realize brushless dual-feed motor governing system, particularly the continuous uninterrupted operation of mesohigh brushless dual-feed motor governing system.
For achieving the above object, the redundancy-type four-quadrant brushless dual-feed motor governing system that the present invention can take over seamlessly, comprise the brushless dual-feed motor being connected with AC network and the mechanical load being connected with this brushless dual-feed motor rotating shaft, PWM convertor assembly and current-variable controller thereof, and current detection module, direct voltage detection module and network voltage detection module, PWM convertor assembly and current-variable controller thereof are respectively two platforms formula structure back-to-back, current detection module, direct voltage detection module and network voltage detection module are respectively two covers, also comprise master controller, wherein:
The interchange end of motor side the first current transformer is connected to the control winding of brushless dual-feed motor through the first current detection module, the interchange end of motor side the second current transformer is connected to the control winding of brushless dual-feed motor through the second current detection module, the DC terminal of the DC terminal of motor side the first current transformer and motor side the second current transformer is connected to DC bus separately; The interchange end of grid side the first current transformer is connected to common frequency power network through the 3rd current detection module, the interchange end of grid side the second current transformer is connected to common frequency power network through the 4th current detection module, and the DC terminal of the DC terminal of grid side the first current transformer and grid side the second current transformer is connected to DC bus separately;
The first current detection module is connected with motor side the first current-variable controller, the second current detection module is connected with motor side the second current-variable controller, the 3rd current detection module is connected with grid side the first current-variable controller, and the 4th current detection module is connected with grid side the second current-variable controller;
The first direct voltage detection module is connected respectively with grid side the first current transformer with motor side the first current transformer, the second direct voltage detection module is connected respectively with grid side the second current transformer with motor side the second current transformer, the first network voltage detection module is connected respectively with grid side the first current transformer with motor side the first current transformer, and the second network voltage detection module is connected respectively with grid side the second current transformer with motor side the second current transformer;
Motor side the first current-variable controller, motor side the second current-variable controller, grid side the first current-variable controller and grid side the second current-variable controller are connected respectively with master controller, master controller arranges each current transformer electric current allocative decision, and by each current-variable controller, controls formula PWM convertor assembly back-to-back and move in the ratio of described electric current allocative decision.
The redundancy-type four-quadrant brushless dual-feed motor governing system that can take over seamlessly, the DC terminal of the DC terminal of wherein said motor side the first current transformer 11 and motor side the second current transformer is connected to same DC bus; The DC terminal of the DC terminal of grid side the first current transformer 21 and grid side the second current transformer is connected to same DC bus.
The redundancy-type four-quadrant brushless dual-feed motor governing system that can take over seamlessly, wherein said master controller is by PORT COM instruction current transformer electric current allocative decision, dynamically form in real time the given value of current value of motor side the first current transformer, motor side the second current transformer, grid side the first current transformer and grid side the second current transformer, each current-variable controller receives the four quadrant running that described given value of current value is controlled each current transformer.
The redundancy-type four-quadrant brushless dual-feed motor governing system that can take over seamlessly, wherein said main controller controls is in each current transformer during out of phase brachium pontis fault, described in corresponding current-variable controller instruction, the brachium pontis that do not break down of current transformer is combined to form a complete 3-phase power converter, realizes the redundancy running of brushless dual-feed motor governing system.
The redundancy-type four-quadrant brushless dual-feed motor governing system that can take over seamlessly, wherein said main controller controls is when arbitrary described motor side current transformer fault or arbitrary grid side current transformer fault, corresponding current-variable controller instruction fault current transformer is out of service, and the undisturbed of realizing brushless dual-feed motor governing system switches.
Advantage and the good effect of the redundancy-type four-quadrant brushless dual-feed motor governing system that the present invention can take over seamlessly are: by having converter structure and the hierarchy of control of redundancy structure, realized four-quadrant brushless dual-feed motor governing system taking over seamlessly and height reliability service between different running statuses.
For making object of the present invention, technical scheme and effect clearer, clear and definite, referring to accompanying drawing, the present invention is described in more detail.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of the present invention's redundancy-type four-quadrant brushless dual-feed motor governing system that can take over seamlessly.
Embodiment
The invention provides a kind of redundancy-type four-quadrant brushless dual-feed motor governing system taking over seamlessly, the PWM of formula back-to-back convertor assembly, dynamic current allocative decision and the current transformer brachium pontis Reconstruction Mechanism by design with redundancy structure, realize the high reliability operation of four-quadrant brushless dual-feed motor governing system.
With reference to Fig. 1, the invention provides a kind of redundancy-type four-quadrant brushless dual-feed motor governing system taking over seamlessly, comprise the brushless dual-feed motor and the mechanical load being connected with this brushless dual-feed motor rotating shaft, PWM convertor assembly and the current-variable controller thereof that are connected with AC network, and current detection module, direct voltage detection module and network voltage detection module.PWM convertor assembly and current-variable controller thereof are respectively two platforms formula structure back-to-back, and current detection module, direct voltage detection module and network voltage detection module are respectively two covers, also comprise a master controller.Wherein:
The interchange end of motor side the first current transformer 11 is connected to the control winding of brushless dual-feed motor through the first current detection module 1, the interchange end of motor side the second current transformer 12 is connected to the control winding of brushless dual-feed motor through the second current detection module 2, the DC terminal of the DC terminal of motor side the first current transformer 11 and motor side the second current transformer 12 is connected to DC bus separately; The interchange end of grid side the first current transformer 21 is connected to common frequency power network through the 3rd current detection module 3, the interchange end of grid side the second current transformer 22 is connected to common frequency power network through the 4th current detection module 4, and the DC terminal of the DC terminal of grid side the first current transformer 21 and grid side the second current transformer 22 is connected to DC bus separately.
In the other embodiment of the redundancy-type four-quadrant brushless dual-feed motor governing system that can take over seamlessly in the present invention, the DC terminal of the DC terminal of motor side the first current transformer 11 and motor side the second current transformer 12 is connected to same DC bus; The DC terminal of the DC terminal of grid side the first current transformer 21 and grid side the second current transformer 22 is connected to same DC bus.
The first current detection module 1 is connected with motor side the first current-variable controller 101, the second current detection module 2 is connected with motor side the second current-variable controller 102, the 3rd current detection module 3 is connected with grid side the first current-variable controller 201, and the 4th current detection module 4 is connected with grid side the second current-variable controller 202.
Inverter controller adopts the vector control method of rotor flux linkage orientation to control motor side the first current transformer 11 and motor side the second current transformer 12, adopts the vector control method of line voltage orientation to control grid side the first current transformer 21 and grid side the second current transformer 22.
The first direct voltage detection module 111 is connected respectively with grid side the first current transformer 201 with motor side the first current transformer 101, the second direct voltage detection module 112 is connected respectively with grid side the second current transformer 202 with motor side the second current transformer 102, the first network voltage detection module 211 is connected respectively with grid side the first current transformer 201 with motor side the first current transformer 101, and the second network voltage detection module 212 is connected respectively with grid side the second current transformer 202 with motor side the second current transformer 102.
Motor side the first current-variable controller 101, motor side the second current-variable controller 102, grid side the first current-variable controller 201 and grid side the second current-variable controller 202 are connected respectively with master controller, by fieldbus or other communication modes, realize each current-variable controller and master controller is two-way interconnected.
Master controller arranges each current transformer electric current allocative decision, and by each current-variable controller, controls formula PWM convertor assembly back-to-back and move in the ratio of this electric current allocative decision.Each current-variable controller received current set-point is controlled the four quadrant running of each current transformer.
When whole current transformers can normally move, master controller is according to operating state reasonable distribution motor side first current transformer 11 of power device, the current ratio of motor side the second current transformer 12, or wherein a set of operation of order, a set of standby; System can be according to operating state reasonable distribution grid side first current transformer 21 of power device, the current ratio of grid side the second current transformer 22, or wherein a set of operation of order, a set of standby.
By master controller human-computer interaction interface, can assign the work of a certain current transformer of stopping using by force, to meet the needs of inspection and maintenance.
Below further describe the specific works process of the embodiment of the present invention.
On the basis of existing brushless dual-feed motor governing system, according to Fig. 1 connected mode, form the PWM of the formula back-to-back convertor assembly with redundancy structure.
By fieldbus or other communication modes, realize the two-way interconnected of current-variable controller and master controller human-computer interaction interface.
By laying temperature transducer on the responsive to temperature point of each current transformer, by communication is interconnected, realize communication with master controller human-computer interaction interface, thereby the temperature rise data of each current transformer are sent into master controller human-computer interaction interface.
Master controller human-computer interaction interface is according to the deviation of DC bus-bar voltage set-point and value of feedback, and passing ratio integral control produces the total current reference value of two grid side current transformers.Then, master controller human-computer interaction interface is according to grid side the first current transformer 21 internal temperature rise Δ T
net side 1with grid side the second current transformer 22 internal temperature rise Δ T
net side 2, according to
the given value of current value of difference dynamic calculation grid side the first current transformer 21 and grid side the second current transformer 22
Master controller human-computer interaction interface is according to the deviation of brushless dual-feed motor rotary speed setting value and value of feedback, and passing ratio integral control produces the total current reference value of motor side the first current transformer 11, motor side the second current transformer 12.Then, master controller human-computer interaction interface is according to motor side the first current transformer 11 internal temperature rise Δ T
pusher side 1with motor side the second current transformer 12 internal temperature rise Δ T
pusher side 2, according to
with
the given value of current value of difference dynamic calculation motor side the first current transformer 11 and motor side the second current transformer 12
with
Two grid side current-variable controllers all adopt line voltage vector oriented control method, the given value of current value of assigning according to master controller human-computer interaction interface respectively
with
form d shaft current reference value separately, q shaft current reference value is all set to 0.Then, two grid side current-variable controllers are according to the deviation of d, q shaft current reference value and value of feedback separately, passing ratio integral control produces the required d of grid side current transformer, q axle is controlled voltage, and this is controlled voltage and by SVPWM modulator approach, forms the driving signal of each switching tube of grid side current transformer.
Two motor side current-variable controllers all adopt power winding flux linkage vector directional controlling method, the given value of current value of assigning according to master controller human-computer interaction interface respectively
with
form q shaft current reference value separately, d shaft current reference value is all set to 0.Then, motor side current-variable controller 1, motor side current-variable controller 2 bases are the deviation of d, q shaft current reference value and value of feedback separately, passing ratio integral control produces the required d of motor side current transformer, q axle is controlled voltage, and this is controlled voltage and by SVPWM modulator approach, forms the driving signal of each switching tube of motor side current transformer.
When a certain motor side current transformer fault being detected, system is out of service by fault current transformer immediately, and with season, the given value of current value of another motor side current transformer is i
pusher side total current, the undisturbed of realizing motor side current transformer switches; When a certain grid side current transformer fault being detected, system is out of service by fault current transformer immediately, and with season, the given value of current value of another grid side current transformer is i
net side total current, the undisturbed of realizing grid side current transformer switches.
In grid side the first current transformer 21 and grid side the second current transformer 22, during out of phase brachium pontis fault, system makes the brachium pontis combination of not breaking down in two current transformers, forms a complete 3-phase power converter.Suppose the B phase brachium pontis fault of grid side the first current transformer 21, the C phase brachium pontis fault of grid side the second current transformer 22, system forms a complete three phase full bridge inverter circuit by the B phase brachium pontis of the A of grid side the first current transformer 21, C phase brachium pontis and grid side the second current transformer 22, thereby realize the reconstruct of grid side current transformer, guarantee the uninterrupted operation of grid side current transformer.
In motor side the first current transformer 11 and motor side the second current transformer 12, during out of phase brachium pontis fault, system makes the brachium pontis combination of not breaking down in two current transformers, forms a complete 3-phase power converter.Suppose the A phase brachium pontis fault of motor side the first current transformer 11, the B phase brachium pontis fault of motor side the second current transformer 12, system forms a complete three phase full bridge inverter circuit by the A phase brachium pontis of the B of motor side the first current transformer 11, C phase brachium pontis and motor side the second current transformer 12, thereby realize the reconstruct of motor side current transformer, guarantee the uninterrupted operation of motor side current transformer.
Embodiment recited above is described the preferred embodiment of the present invention; not the spirit and scope of the present invention are limited; do not departing under design prerequisite of the present invention; various modification and improvement that in this area, common engineers and technicians make technical scheme of the present invention; all should fall into protection scope of the present invention; the technology contents that the present invention asks for protection, is all documented in claims.
Claims (5)
1. the redundancy-type four-quadrant brushless dual-feed motor governing system that can take over seamlessly, comprise the brushless dual-feed motor being connected with AC network and the mechanical load being connected with this brushless dual-feed motor rotating shaft, PWM convertor assembly and current-variable controller thereof, and current detection module, direct voltage detection module and network voltage detection module, it is characterized in that: described PWM convertor assembly and current-variable controller thereof are respectively two platforms formula structure back-to-back, described current detection module, direct voltage detection module and network voltage detection module are respectively two covers, also comprise master controller, wherein:
The interchange end of motor side the first current transformer (11) is connected to the control winding of brushless dual-feed motor through the first current detection module (1), the interchange end of motor side the second current transformer (12) is connected to the control winding of brushless dual-feed motor through the second current detection module (2), the DC terminal of the DC terminal of described motor side the first current transformer (11) and motor side the second current transformer (12) is connected to DC bus separately; The interchange end of grid side the first current transformer (21) is connected to common frequency power network through the 3rd current detection module (3), the interchange end of grid side the second current transformer (22) is connected to common frequency power network through the 4th current detection module (4), and the DC terminal of the DC terminal of described grid side the first current transformer (21) and grid side the second current transformer (22) is connected to DC bus separately;
Described the first current detection module (1) is connected with motor side the first current-variable controller (101), described the second current detection module (2) is connected with motor side the second current-variable controller (102), described the 3rd current detection module (3) is connected with described grid side the first current-variable controller (201), and described the 4th current detection module (4) is connected with grid side the second current-variable controller (202);
The first direct voltage detection module (111) is connected respectively with grid side the first current transformer (201) with described motor side the first current transformer (101), the second direct voltage detection module (112) is connected respectively with grid side the second current transformer (202) with described motor side the second current transformer (102), the first network voltage detection module (211) is connected respectively with grid side the first current transformer (201) with described motor side the first current transformer (101), and the second network voltage detection module (212) is connected respectively with grid side the second current transformer (202) with described motor side the second current transformer (102);
Described motor side the first current-variable controller (101), motor side the second current-variable controller (102), grid side the first current-variable controller (201) and grid side the second current-variable controller (202) are connected respectively with described master controller, described master controller arranges each current transformer electric current allocative decision, and by each current-variable controller, controls formula PWM convertor assembly back-to-back and move in the ratio of described electric current allocative decision.
2. the redundancy-type four-quadrant brushless dual-feed motor governing system taking over seamlessly according to claim 1, is characterized in that: the DC terminal of the DC terminal of wherein said motor side the first current transformer (11) and motor side the second current transformer (12) is connected to same DC bus; The DC terminal of the DC terminal of described grid side the first current transformer (21) and grid side the second current transformer (22) is connected to same DC bus.
3. the redundancy-type four-quadrant brushless dual-feed motor governing system taking over seamlessly according to claim 1 and 2, it is characterized in that: wherein said master controller is by PORT COM instruction current transformer electric current allocative decision, dynamically form in real time the given value of current value of described motor side the first current transformer (11), motor side the second current transformer (12), grid side the first current transformer (21) and grid side the second current transformer (22), each current-variable controller receives the four quadrant running that described given value of current value is controlled each current transformer.
4. the redundancy-type four-quadrant brushless dual-feed motor governing system taking over seamlessly according to claim 1 and 2, it is characterized in that: wherein said main controller controls is in each current transformer during out of phase brachium pontis fault, described in corresponding current-variable controller instruction, the brachium pontis that do not break down of current transformer is combined to form a complete 3-phase power converter, realizes the redundancy running of brushless dual-feed motor governing system.
5. the redundancy-type four-quadrant brushless dual-feed motor governing system taking over seamlessly according to claim 1 and 2, it is characterized in that: wherein said main controller controls is when arbitrary described motor side current transformer fault or arbitrary grid side current transformer fault, corresponding current-variable controller instruction fault current transformer is out of service, and the undisturbed of realizing brushless dual-feed motor governing system switches.
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| CN201410382239.XA CN104113265B (en) | 2014-08-06 | 2014-08-06 | The redundancy-type four-quadrant brushless dual-feed motor governing system that can take over seamlessly |
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| CN105322840A (en) * | 2015-11-19 | 2016-02-10 | 广东上水能源科技有限公司 | Redundant type brushless double-fed motor speed regulating system capable of realizing flexible operation |
| CN106899242A (en) * | 2017-04-28 | 2017-06-27 | 广东上水能源科技有限公司 | A kind of brushless dual-feed motor starts control device and method |
| CN112260254A (en) * | 2020-11-03 | 2021-01-22 | 中国科学院电工研究所 | Fault current controller and control method |
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| CN104113265B (en) | 2016-08-24 |
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Inventor after: Ma Xiaoliang Inventor after: Zhang Miao Inventor after: Liang Huibing Inventor after: Yang Hua Inventor before: Zhang Miao Inventor before: Liang Huibing Inventor before: Yang Hua |
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