CN105449726A - Current-sharing control method of bidirectional variable flow type feedback device and traction rectifier - Google Patents
Current-sharing control method of bidirectional variable flow type feedback device and traction rectifier Download PDFInfo
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- CN105449726A CN105449726A CN201511015523.4A CN201511015523A CN105449726A CN 105449726 A CN105449726 A CN 105449726A CN 201511015523 A CN201511015523 A CN 201511015523A CN 105449726 A CN105449726 A CN 105449726A
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- flow type
- bidirectional variable
- type feedback
- feedback device
- traction rectifier
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J5/00—Circuit arrangements for transfer of electric power between ac networks and dc networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/66—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal
- H02M7/68—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters
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Abstract
The invention relates to a current-sharing control method of a bidirectional variable flow type feedback device and a traction rectifier. The method comprises following steps: 1), obtaining the open circuit voltage value and the equivalent internal resistance of the traction rectifier, thus obtaining the relation of the voltage and the current of the traction rectifier; 2), setting an open circuit voltage value for the bidirectional variable flow type feedback device according to the open circuit voltage value of the traction rectifier; 3), setting the droop coefficient of the bidirectional variable flow type feedback device according to the equivalent internal resistance of the traction rectifier, enabling the equivalent internal resistance of the bidirectional variable flow type feedback device to be always equal to that of the traction rectifier; 4), supplying power for traction of a terrain locomotive by the bidirectional variable flow type feedback device according to the set open circuit voltage value and the droop coefficient. The method realizes current-sharing control of the bidirectional variable flow type feedback device and the traction rectifier through the control algorithm of the software without changing the hardware and increasing extra cost, and improves the service life of the bidirectional variable flow type feedback device and the traction rectifier.
Description
Technical field
The invention belongs to subway regenerative braking energy feedback field, be specifically related to the current-sharing control method of Bidirectional variable-flow type feedback device and traction rectifier device.
Background technology
Along with the develop rapidly of national economy, more and more advocate low-carbon environment-friendly, green energy resource.Urban track traffic fast development, the excess energy produced during underground engines skidding is fed back to AC network in the mode of inversion feed-back parallel network by subway regenerative braking feedback current transformer, play the advantage of subway regenerative braking, have low-carbon energy-saving, environmental protection, reliable and stable, invest low outstanding advantage, be following subway regenerating braking energy absorb developing direction.
Subway feedback current transformer itself belongs to Three-phase PWM Voltage Rectifier, PWM rectifier has energy two-way transmission and the controlled advantage of power factor, therefore subway feedback current transformer not only can to realize energy inversion when subway locomotive brake to AC network, is underground engines traction power supply by AC rectification when also can work as subway locomotive traction.During locomotive traction, Bidirectional variable-flow type feedback device and traction rectifier device give locomotive power supply simultaneously, because both internal resistances are different, will inevitably cause not current-sharing, produce circulation time even serious between Bidirectional variable-flow type feedback device and traction rectifier device.The tractive power supply system schematic diagram of Bidirectional variable-flow type feedback device and traction rectifier device as shown in Figure 1.
Summary of the invention
The invention provides the current-sharing control method of Bidirectional variable-flow type feedback device and traction rectifier device, during to solve Bidirectional variable-flow type feedback device and traction rectifier device simultaneously to locomotive power supply, produce circulation therebetween and reduce the problem in Bidirectional variable-flow type feedback device and traction rectifier device useful life.
For solving the problems of the technologies described above, the current-sharing control method of Bidirectional variable-flow type feedback device of the present invention and traction rectifier device comprises the steps:
1) obtain floating voltage value and the equivalent internal resistance of traction rectifier device, thus obtain the voltage of traction rectifier device and the relation of electric current;
2) according to the floating voltage value of traction rectifier device, for Bidirectional variable-flow type feedback device arranges floating voltage value;
3) according to the equivalent internal resistance of traction rectifier device, the sagging coefficient of Bidirectional variable-flow type feedback device is set, makes the equivalent internal resistance of Bidirectional variable-flow type feedback device equal the equivalent internal resistance of traction rectifier device all the time;
4) Bidirectional variable-flow type feedback device is that terrain locomotive traction is powered according to the floating voltage value arranged and sagging coefficient.
Step 3) in adopt droop control be segmentation droop control, according to the equivalent internal resistance of traction rectifier device in different phase, the sagging coefficient of Bidirectional variable-flow type feedback device in the corresponding stage is set, makes the equivalent internal resistance of Bidirectional variable-flow type feedback device equal constantly with the equivalent internal resistance of traction rectifier device.
The floating voltage value of described Bidirectional variable-flow type feedback device is not less than the floating voltage value of traction rectifier device.
Be the actual conditions that terrain locomotive traction is powered in conjunction with Bidirectional variable-flow type feedback device and traction rectifier device simultaneously, in real time the sagging coefficient of Bidirectional variable-flow type feedback device adjusted, to improve equal mobility.
The current-sharing control method of Bidirectional variable-flow type feedback device of the present invention and traction rectifier device is according to the floating voltage of traction rectifier device and equivalent internal resistance, to the floating voltage of Bidirectional variable-flow type feedback device and the control of equivalent internal resistance, i.e. droop control, realizes running with the current-sharing of traction rectifier device.The method, without the need to hardware modifications, without the need to increasing extra cost, only being reached the sharing control of Bidirectional variable-flow type feedback device and traction rectifier device, improving the life-span of Bidirectional variable-flow type feedback device and traction rectifier device by the droop control algorithm of software.
Accompanying drawing explanation
Fig. 1 is the tractive power supply system schematic diagram of Bidirectional variable-flow type feedback device and traction rectifier device;
Fig. 2 is the sharing control policy map of Bidirectional variable-flow type feedback device and traction rectifier device.
Embodiment
Below in conjunction with accompanying drawing, technical scheme of the present invention is further described in detail.
The Bidirectional variable-flow type feedback device of the present embodiment and the current-sharing control method of traction rectifier device comprise the steps:
1) obtain floating voltage value and the equivalent internal resistance of traction rectifier device, thus obtain the voltage of traction rectifier device and the relation of electric current;
2) according to the floating voltage value of traction rectifier device, for Bidirectional variable-flow type feedback device arranges floating voltage value;
3) according to the equivalent internal resistance of traction rectifier device, the sagging coefficient of Bidirectional variable-flow type feedback device is set, makes the equivalent internal resistance of Bidirectional variable-flow type feedback device equal the equivalent internal resistance of traction rectifier device all the time;
4) Bidirectional variable-flow type feedback device is that terrain locomotive traction is powered according to the floating voltage value arranged and sagging coefficient.
Step 3) in adopt droop control be segmentation droop control, according to the equivalent internal resistance of traction rectifier device in different phase, the sagging coefficient of Bidirectional variable-flow type feedback device in the corresponding stage is set, makes the equivalent internal resistance of Bidirectional variable-flow type feedback device equal constantly with the equivalent internal resistance of traction rectifier device.
The floating voltage value of Bidirectional variable-flow type feedback device is not less than the floating voltage value of traction rectifier device.
Further, can carry out pull test, Bidirectional variable-flow type feedback device and traction rectifier device, simultaneously for terrain locomotive traction is powered, contrast current-sharing situation, then finely tune the sagging coefficient of Bidirectional variable-flow type feedback device further, thus make equal mobility higher.
During locomotive traction, Bidirectional variable-flow type feedback device and traction rectifier device give locomotive power supply simultaneously, because the floating voltage of traction rectifier device and equivalent internal resistance are uncontrollable, and the floating voltage of Bidirectional variable-flow type feedback device and equivalent internal resistance are controlled, therefore by the droop control to Bidirectional variable-flow type feedback device, realize running with the current-sharing of traction rectifier device.Wherein, droop control algorithm is common technology means in prior art, no longer describes in detail here.The method is mainly the equivalent internal resistance by regulating sagging coefficient to control Bidirectional variable-flow type feedback device, makes the equivalent internal resistance of Bidirectional variable-flow type feedback device identical with the equivalent internal resistance of traction rectifier device all the time, thus realizes running with the current-sharing of traction rectifier device.The method, without the need to hardware modifications, without the need to increasing extra cost, only being reached the sharing control of Bidirectional variable-flow type feedback device and traction rectifier device, improving the life-span of Bidirectional variable-flow type feedback device and traction rectifier device by the control algolithm of software.
Claims (4)
1. the current-sharing control method of Bidirectional variable-flow type feedback device and traction rectifier device, is characterized in that, the method comprises the steps:
1) obtain floating voltage value and the equivalent internal resistance of traction rectifier device, thus obtain the voltage of traction rectifier device and the relation of electric current;
2) according to the floating voltage value of traction rectifier device, for Bidirectional variable-flow type feedback device arranges floating voltage value;
3) according to the equivalent internal resistance of traction rectifier device, the sagging coefficient of Bidirectional variable-flow type feedback device is set, makes the equivalent internal resistance of Bidirectional variable-flow type feedback device equal the equivalent internal resistance of traction rectifier device all the time;
4) Bidirectional variable-flow type feedback device is that terrain locomotive traction is powered according to the floating voltage value arranged and sagging coefficient.
2. the current-sharing control method of Bidirectional variable-flow type feedback device and traction rectifier device according to claim 1, it is characterized in that, step 3) in adopt droop control be segmentation droop control, according to the equivalent internal resistance of traction rectifier device in different phase, the sagging coefficient of Bidirectional variable-flow type feedback device in the corresponding stage is set, makes the equivalent internal resistance of Bidirectional variable-flow type feedback device equal constantly with the equivalent internal resistance of traction rectifier device.
3. the current-sharing control method of Bidirectional variable-flow type feedback device and traction rectifier device according to claim 1, it is characterized in that, the floating voltage value of described Bidirectional variable-flow type feedback device is not less than the floating voltage value of traction rectifier device.
4. the current-sharing control method of Bidirectional variable-flow type feedback device and traction rectifier device according to claim 2, it is characterized in that, be actual conditions that terrain locomotive traction is powered in conjunction with Bidirectional variable-flow type feedback device and traction rectifier device simultaneously, the sagging coefficient of Bidirectional variable-flow type feedback device is adjusted, to improve equal mobility in real time.
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| CN201511015523.4A CN105449726B (en) | 2015-12-29 | 2015-12-29 | The current-sharing control method of Bidirectional variable-flow type feedback device and traction rectifier device |
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| CN201511015523.4A CN105449726B (en) | 2015-12-29 | 2015-12-29 | The current-sharing control method of Bidirectional variable-flow type feedback device and traction rectifier device |
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| CN105449726B CN105449726B (en) | 2017-11-07 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106364335A (en) * | 2016-09-30 | 2017-02-01 | 西安许继电力电子技术有限公司 | Device and method for automatically adjusting drooping coefficient of bidirectional variable-flow feedback device |
| CN114221333A (en) * | 2021-12-10 | 2022-03-22 | 江苏晨大电气股份有限公司 | Intelligent network voltage control method, device and system for rail transit bidirectional converter |
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| DE102008049536B3 (en) * | 2008-09-29 | 2010-06-24 | Siemens Aktiengesellschaft | Method for controlling rectifier circuit in rolling mill, involves interrupting ignition pulse sequence for beginning of commutation periods in mains phases for duration of pulse rest period during regenerative operation of circuit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106364335A (en) * | 2016-09-30 | 2017-02-01 | 西安许继电力电子技术有限公司 | Device and method for automatically adjusting drooping coefficient of bidirectional variable-flow feedback device |
| CN106364335B (en) * | 2016-09-30 | 2018-11-27 | 西安许继电力电子技术有限公司 | A kind of sagging coefficient automatic adjusting device and method of Bidirectional variable-flow type feedback device |
| CN114221333A (en) * | 2021-12-10 | 2022-03-22 | 江苏晨大电气股份有限公司 | Intelligent network voltage control method, device and system for rail transit bidirectional converter |
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| CN105449726B (en) | 2017-11-07 |
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