CN102832872A - Multi-level matrix frequency converter based speed-regulating control system of mine hoist - Google Patents
Multi-level matrix frequency converter based speed-regulating control system of mine hoist Download PDFInfo
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- CN102832872A CN102832872A CN2012100289402A CN201210028940A CN102832872A CN 102832872 A CN102832872 A CN 102832872A CN 2012100289402 A CN2012100289402 A CN 2012100289402A CN 201210028940 A CN201210028940 A CN 201210028940A CN 102832872 A CN102832872 A CN 102832872A
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- 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
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- Y02E40/40—Arrangements for reducing harmonics
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Abstract
The invention discloses a multi-level matrix frequency converter based speed-regulating control system of a mine hoist, which is connected with a power grid and a wound-rotor asynchronous motor, comprises the multi-level matrix frequency converter, an A/D (Analog-Digital) sampling module and a vector control system. One side of the multi-level matrix frequency converter is connected with the power grid, and the other side thereof is directly connected with a three-phase stator of the asynchronous motor to perform AC-AC (Alternating Current-Alternating Current) frequency conversion and rotation speed control, therefore, high-performance speed-regulating control of the mine hoist is achieved. The system further comprises a 9*n cascade unit module matrix. The A/D sampling module is connected with the multi-level matrix frequency converter in order to collect rotation speed, current and voltage parameters of the motor. The vector control module is connected with the multi-level matrix frequency converter and the A/D sampling module in order to give out a stator voltage vector signal needed by speed regulation of the asynchronous motor according to the rotation speed, current and voltage parameters collected by the A/D sampling module. The system disclosed by the invention has the advantages of energy bidirectional flow, adjustable input-side power factor, small input current harmonic waves, low energy consumption and ease in integration.
Description
Technical field
The present invention relates to the application of the wire-wound asynchronous motor speed control device in the mine hoist, be specifically related to a kind of mine hoist speed-adjusting and control system based on the multi-level matrix frequency converter.
Background technology
In the mine hoist of China, because wound type asynchronous motor has advantages such as simple in structure, compact, firm, that capacity is big, the speed-regulating mode that makes wound type asynchronous motor drive mine hoist is used widely.Such elevator overwhelming majority all adopts the wound asynchronous motor rotor series resistance speed at present; Utilize that the various combination of resistance operates on the different mechanical characteristics motor in the rotor loop; Thereby reach the purpose of speed governing, poor but it has a speed adjusting performance, energy consumption is high; Maintenance workload is big, moves shortcomings such as uneconomical.
Summary of the invention
The present invention is directed to the above-mentioned deficiency that prior art exists; A kind of mine hoist speed-adjusting and control system based on the multi-level matrix frequency converter is provided; H bridge tandem type converter technique and matrix form variable-frequency control technique are combined; Formed the friendship friendship Direct Conversion governing system that a kind of novel wound type asynchronous motor drives mine hoist, this system has can realize the energy two-way flow, the input side power factor is adjustable, the little and characteristic of low energy consumption of Harmonics of Input.
For realizing above-mentioned purpose, the present invention realizes through following technical scheme:
A kind of mine hoist speed-adjusting and control system based on the multi-level matrix frequency converter is connected with wire-wound asynchronous motor with electrical network respectively, comprising: multi-level matrix converter, A/D sampling module and vector control system, wherein,
Multi-level matrix frequency converter one side links to each other with electrical network, and opposite side directly links to each other with the asynchronous machine threephase stator, hands over the control of Direct Conversion and rotating speed, realizes high performance mine hoist speed regulating control, and it further comprises 9 * n cascade unit module matrix;
The A/D sampling module is connected with the multi-level matrix frequency converter, in order to gather rotating speed of motor, electric current and voltage parameter;
Vector control module is connected with the A/D sampling module with the multi-level matrix frequency converter respectively, in order to rotating speed, electric current and the voltage parameter of being gathered according to the A/D sampling module, provides the required stator voltage vector signal of asynchronous motor drive.
According to the described mine hoist speed-adjusting and control system of preferred embodiment of the present invention based on the multi-level matrix frequency converter; Its 9 * n cascade unit module matrix comprises 9 brachium pontis; Each brachium pontis is formed by the cascade of N low pressure H bridging frequency module; And the cascade brachium pontis is 3 * 3 matrix array, and the three-phase input end of a side of array links to each other with electrical network, and the three-phase output end of opposite side directly links to each other with the threephase stator of asynchronous machine.
According to the described mine hoist speed-adjusting and control system based on the multi-level matrix frequency converter of preferred embodiment of the present invention, its low pressure H bridging frequency module further comprises low pressure H bridging unit, sub-A/D sampling module and trigger impulse control module frequently, wherein,
Low pressure H bridging unit frequently is the bridge-type single-phase inverter that four IGBT switches and electrochemical capacitor are formed;
Sub-A/D sampling module is connected the unit with low pressure H bridging frequently, in order to gather capacitance voltage;
The trigger impulse control module frequently is connected with sub-A/D sampling module the unit with low pressure H bridging respectively, in order to carrying out communication with vector control module, and transmission voltage information, the control signal of reception vector control module drives 4 IGBT switches.
The present invention adopts the Vector Control System of Induction Motor technology, stator current is decomposed into excitation component and torque component, and it is controlled respectively, thereby reach the closed-loop control to rotating speed.Compared with prior art, the invention has the beneficial effects as follows: adopt modularized design, be convenient to expand according to different power system capacities, simultaneously, Redundancy Design makes safeguards facility more; Compared to two traditional level and 3 flat outputs; The harmonic content of many level outputs significantly reduces; Reduced the harmonic wave of governing system, and improved the power factor of input side, and output current is continuous; Improve the lifting efficient of mine hoist, reduced the energy consumption of traditional coiling electric motor rotor series resistance speed mode.
Description of drawings
Fig. 1 is the topology diagram of a kind of mine hoist speed-adjusting and control system based on the multi-level matrix frequency converter of the present invention;
Fig. 2 is the structural representation of the low pressure H bridging frequency unit of the embodiment of the invention;
Fig. 3 is the multi-level matrix frequency conversion speed-adjusting system major loop schematic diagram of the embodiment of the invention.
Embodiment
The structure and the principle of a kind of mine hoist speed-adjusting and control system based on the multi-level matrix frequency converter that will combine below that accompanying drawing explains in detail that patent of the present invention provides.
Please consult Fig. 1 to Fig. 2 simultaneously, a kind of mine hoist speed-adjusting and control system based on the multi-level matrix frequency converter is connected with wire-wound asynchronous motor 5 with electrical network 4 respectively, comprising: multi-level matrix converter 1, A/D sampling module 2 and vector control system 3.Multi-level matrix frequency converter 1 one sides link to each other with electrical network 4; Opposite side directly links to each other with the threephase stator of asynchronous machine 5, hands over the control of Direct Conversion and rotating speed, realizes high performance mine hoist speed regulating control; It comprises 9 * n cascade unit module matrix; And 9 * n cascade unit module matrix comprises 9 brachium pontis, and each brachium pontis is formed by the cascade of N low pressure H bridging frequency module, and the cascade brachium pontis is 3 * 3 matrix array; The three-phase input end of one side of array links to each other with electrical network 4, and the three-phase output end of opposite side directly links to each other with the threephase stator of asynchronous machine 5.A/D sampling module 2 is connected with multi-level matrix frequency converter 1, in order to gather rotating speed of motor, electric current and voltage parameter.Vector control module 3 is connected with A/D sampling module 2 with multi-level matrix frequency converter 1 respectively, in order to rotating speed, electric current and the voltage parameter of being gathered according to A/D sampling module 2, provides the required stator voltage vector signal of asynchronous motor drive.
Low pressure H bridging frequency module further comprises low pressure H bridging unit 6, sub-A/D sampling module 7 and trigger impulse control module 8 frequently.Low pressure H bridging unit 6 frequently is the bridge-type single-phase inverter that four IGBT switches and electrochemical capacitor are formed.Sub-A/D sampling module 7 is connected unit 6 with low pressure H bridging frequently, in order to gather capacitance voltage.Trigger impulse control module 8 frequently is connected with sub-A/D sampling module 7 unit 6 with low pressure H bridging respectively, in order to carrying out communication with vector control module 3, and transmission voltage information, the control signal of reception vector control module 3 drives 4 IGBT switches.
The present invention adopts the Vector Control System of Induction Motor technology, stator current is decomposed into excitation component and torque component, and it is controlled respectively, thereby reach the closed-loop control to rotating speed.Its concrete operation principle is following: be charged to a constant DC voltage through three-phase input voltage alignment electric capacity; Realize the NE BY ENERGY TRANSFER of multi-level matrix converter 1; Select suitable switch combination and control strategy; Can synthesize the controlled input/output voltage of the few and near sinusoidal of low-order harmonic content in the converter both sides, different on off states can synthesize the voltage level of different brackets.Multi-level matrix converter 1 links to each other with the threephase stator of asynchronous machine 5, and this system adopts the traditional asynchronous machine vector control method, and its directed magnetic linkage is a rotor flux.
Please consult Fig. 3 again, it is the multi-level matrix frequency conversion speed-adjusting system major loop schematic diagram of the embodiment of the invention.Multi-level matrix frequency conversion speed-adjusting system major loop comprises the 6kV electrical network, three-phase high-voltage circuit breaker K1, K2 and K3; Charging resistor R, contactor JC1, multi-level matrix converter 1; Voltage sensor CYH, current sensor HCT1 and HCT2, power are the wire-wound asynchronous motor of 800kW.When the multi-level matrix frequency conversion speed-adjusting system normally moved, circuit breaker K3 broke off, and circuit breaker K1 and K2 are closed.When system had just started, contactor JC1 broke off, and in the charging resistor R connecting system, prevented that impulse current from producing; After system start-up finished, contactor JC1 was closed, and charging resistor R logs off, and governing system begins normal operation.
Compared with prior art, the invention has the beneficial effects as follows: adopt modularized design, be convenient to expand according to different power system capacities, simultaneously, Redundancy Design makes safeguards facility more; Compared to two traditional level and 3 flat outputs; The harmonic content of many level outputs significantly reduces; Reduced the harmonic wave of governing system, and improved the power factor of input side, and output current is continuous; Improve the lifting efficient of mine hoist, reduced the energy consumption of traditional coiling electric motor rotor series resistance speed mode.
The above; It only is preferable embodiment of the present invention; Be not that the present invention is done any pro forma restriction; Any content that does not break away from technical scheme of the present invention according to any simple modification, equivalent variations and the modification that technical spirit of the present invention is done above embodiment, all belongs to the scope of technical scheme of the present invention.
Claims (3)
1. the mine hoist speed-adjusting and control system based on the multi-level matrix frequency converter is connected with wire-wound asynchronous motor with electrical network respectively, it is characterized in that, comprising: multi-level matrix converter, A/D sampling module and vector control system, wherein,
Said multi-level matrix frequency converter one side links to each other with electrical network; Opposite side directly links to each other with the asynchronous machine threephase stator; Hand over the control of Direct Conversion and rotating speed, realize high performance mine hoist speed regulating control, it further comprises 9 * n cascade unit module matrix;
Said A/D sampling module is connected with said multi-level matrix frequency converter, in order to gather rotating speed of motor, electric current and voltage parameter;
Said vector control module is connected with the A/D sampling module with said multi-level matrix frequency converter respectively, in order to rotating speed, electric current and the voltage parameter of being gathered according to said A/D sampling module, provides the required stator voltage vector signal of asynchronous motor drive.
2. the multi-level matrix frequency conversion speed-adjusting system that is applicable to mine hoist as claimed in claim 1; It is characterized in that; Said 9 * n cascade unit module matrix comprises 9 brachium pontis, and each said brachium pontis is formed by the cascade of N low pressure H bridging frequency module, and said cascade brachium pontis is 3 * 3 matrix array; The three-phase input end of one side of said array links to each other with electrical network, and the three-phase output end of opposite side directly links to each other with the threephase stator of asynchronous machine.
3. the multi-level matrix frequency conversion speed-adjusting system that is applicable to mine hoist as claimed in claim 2 is characterized in that, described low pressure H bridging frequency module further comprises low pressure H bridging unit, sub-A/D sampling module and trigger impulse control module frequently, wherein,
Said low pressure H bridging unit frequently is the bridge-type single-phase inverter that four IGBT switches and electrochemical capacitor are formed;
Said sub-A/D sampling module is connected the unit with said low pressure H bridging frequently, in order to gather capacitance voltage;
Said trigger impulse control module is connected with sub-A/D sampling module the unit with said low pressure H bridging respectively frequently, in order to carrying out communication with said vector control module, and transmission voltage information, the control signal of reception vector control module drives 4 IGBT switches.
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| CN201210028940.2A CN102832872B (en) | 2012-02-09 | 2012-02-09 | A kind of mine hoist speed-adjusting and control system based on multi-level matrix frequency converter |
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| CN201210028940.2A CN102832872B (en) | 2012-02-09 | 2012-02-09 | A kind of mine hoist speed-adjusting and control system based on multi-level matrix frequency converter |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102983735A (en) * | 2012-12-21 | 2013-03-20 | 山东大学 | Pre-charge system and method for capacitor of modular multi-level matrix converter |
| CN106444530A (en) * | 2016-11-08 | 2017-02-22 | 北京金自天正智能控制股份有限公司 | AC-AC (alternating current) frequency conversion control panel integrating with MODBUS protocol |
| CN117559568A (en) * | 2024-01-12 | 2024-02-13 | 广东海洋大学 | Cascade micro-grid power distribution method based on wind power generation and wave energy generation |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108768182B (en) * | 2018-06-29 | 2019-11-19 | 浙江大学 | Multilevel matrix converter and its clamping capacitor voltage control method suitable for high power density occasion |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102983735A (en) * | 2012-12-21 | 2013-03-20 | 山东大学 | Pre-charge system and method for capacitor of modular multi-level matrix converter |
| CN102983735B (en) * | 2012-12-21 | 2015-05-20 | 山东大学 | Pre-charge system and method for capacitor of modular multi-level matrix converter |
| CN106444530A (en) * | 2016-11-08 | 2017-02-22 | 北京金自天正智能控制股份有限公司 | AC-AC (alternating current) frequency conversion control panel integrating with MODBUS protocol |
| CN117559568A (en) * | 2024-01-12 | 2024-02-13 | 广东海洋大学 | Cascade micro-grid power distribution method based on wind power generation and wave energy generation |
| CN117559568B (en) * | 2024-01-12 | 2024-04-09 | 广东海洋大学 | Cascade micro-grid power distribution method based on wind power generation and wave energy generation |
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