CN106169772B - A kind of energy feedback system starting control method and control system based on floating gate threshold value - Google Patents
A kind of energy feedback system starting control method and control system based on floating gate threshold value Download PDFInfo
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- CN106169772B CN106169772B CN201610638392.3A CN201610638392A CN106169772B CN 106169772 B CN106169772 B CN 106169772B CN 201610638392 A CN201610638392 A CN 201610638392A CN 106169772 B CN106169772 B CN 106169772B
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- H02J3/382—
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L7/00—Electrodynamic brake systems for vehicles in general
- B60L7/10—Dynamic electric regenerative braking
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
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Abstract
The invention discloses a kind of energy feedback system starting control method and control system based on floating gate threshold value, control method includes: that S1. obtains AC network actual voltage value, DC grid actual voltage value；S2. DC grid floating voltage value and floating gate threshold value are calculated；S3. when DC grid actual voltage value is greater than floating gate threshold value and power grid is in non-light condition, starting energy feedback system, otherwise not starting can feedback system；The control system includes measurement module, computing module and starting control module.The present invention have can judge automatically whether power grid is in light condition, by the way that floating gate threshold value is arranged, it can effectively solve the problems, such as to use and cause energy feedback system error starting under fixed threshold value mode because of voltage ripple of power network, unnecessary loss and energy consumption are reduced, the economic indicator of entirely energy feedback system is effectively improved；And optimal starting threshold is selected according to network pressure actual conditions, can further improve system response time, guarantees feedback system and plays maximum effect.
Description
Technical field
The present invention relates to regeneration energy can present field more particularly to a kind of energy feedback system starting control based on floating gate threshold value
Method and control system processed.
Background technique
The urban track traffic of 21 century will pursue energy-saving and environment-friendly green traffic system.In entire urban track traffic
In system, the accounting of energy consumption of vehicles is generally above the 50% of whole system energy consumption, swift and violent with urban rail transit technology
Development, the research that domestic and international each producer generates the absorption of energy and utilize when braking to city rail vehicle are more and more.
Urban track traffic can present apparatus system circuit theory as shown in Figure 1, starting threshold value, the Yi Jiwen of device can be presented
The height of pressure value is directly related to the utilization rate of direct current net voltage.Fixed threshold value cannot judge the liter of DC grid voltage
Height be because train braking generate braking energy or because exchange side voltage ripple of power network or be DC grid other
Caused by load variation, therefore may cause using fixed threshold value can feedback system error starting.The error starting of device can be led
Enable feedback device and rectifier directly form circulation, cause a large amount of wastes of energy, and increase the loss of current transformer, because
This, carries out correctly starting control to energy feedback system and has great importance.
Summary of the invention
The technical problem to be solved in the present invention is that, for technical problem of the existing technology, the present invention provides one
Kind can effectively solve the problems, such as that reduction is set using energy feedback system error starting is caused under fixed threshold value mode because of voltage ripple of power network
Standby unnecessary loss and energy consumption effectively improve the economic indicator of entirely energy feedback system, improve system response time, guarantee to present
System plays the energy feedback system starting control method and control system of maximum effect.
In order to solve the above technical problems, technical solution proposed by the present invention are as follows: a kind of to present system based on floating gate threshold value
System starting control method, includes the following steps:
S1. AC network actual voltage value U is obtainedabc, DC grid actual voltage value Ud；
S2. DC grid floating voltage value U is calculatedoWith floating gate threshold value Uf；
S3. as the DC grid actual voltage value UdGreater than the floating gate threshold value UfAnd power grid is in non-light condition
When, starting energy feedback system, otherwise not starting can feedback system.
As a further improvement of the present invention, DC grid floating voltage value U in the step S2oBy AC network reality
Voltage value UabcIt is obtained according to the conversion of the no-load voltage ratio of rectifier transformer.
As a further improvement of the present invention, the floating gate threshold value in the step S2 is calculated by formula (1):
In formula (1), UfFor floating gate threshold value, UabcFor AC network actual voltage value, Uabc1It is empty for preset AC network
Carry voltage value, UoFor DC grid floating voltage value, UnFor preset starting threshold desired value.
As a further improvement of the present invention, in the step S3, power grid is in light condition and is judged according to formula (2), formula
(2) determine that power grid is in light condition when setting up,
In formula (2), UdFor DC grid actual voltage value, UabcFor AC network actual voltage value, Uabc1For preset friendship
Galvanic electricity net floating voltage value, UoFor DC grid floating voltage value, X is that preset zero load judges threshold value.
As a further improvement of the present invention, when the network pressure grade of DC grid is DC1500V, the preset zero load
Judge the value range of threshold value X for [20,40].
As a further improvement of the present invention, the feedback system of starting energy described in the step S3 is to be delayed after the preset time
Starting can feedback system.
A kind of energy feedback system starting control system based on floating gate threshold value, comprising:
Measurement module: for obtaining AC network actual voltage value Uabc, DC grid actual voltage value Ud；
Computing module: for calculating DC grid floating voltage value UoWith floating gate threshold value Uf；
Start control module: for working as the DC grid actual voltage value UdGreater than the floating gate threshold value UfAnd power grid
When in non-light condition, starting energy feedback system, otherwise not starting can feedback system.
Having compared with the prior art, the advantages of the present invention are as follows: the present invention can judge automatically whether power grid is in unloaded
State, and by setting floating gate threshold value, it can effectively solve to cause using under fixed threshold value mode because of voltage ripple of power network
Energy feedback system error starting problem reduces the unnecessary loss of equipment and energy consumption, effectively improves the economic indicator of entirely energy feedback system；
Additionally by the mode of floating threshold, optimal starting threshold is selected according to network pressure actual conditions, further increases system response
Speed guarantees feedback system and plays maximum effect.
Detailed description of the invention
Fig. 1 is can feedback system circuit topology schematic diagram.
Fig. 2 is specific embodiment of the invention flow chart.
Fig. 3 is specific embodiment of the invention logical schematic.
Fig. 4 is specific embodiment of the invention structural schematic diagram.
Specific embodiment
Below in conjunction with Figure of description and specific preferred embodiment, the invention will be further described, but not therefore and
It limits the scope of the invention.
As shown in Figures 2 and 3, the present embodiment starts control method based on the energy feedback system of floating gate threshold value, including as follows
Step: S1. obtains AC network actual voltage value Uabc, DC grid actual voltage value Ud；S2. the unloaded electricity of DC grid is calculated
Pressure value UoWith floating gate threshold value Uf；S3. as DC grid actual voltage value UdGreater than floating gate threshold value UfAnd power grid is in non-zero load
When state, starting energy feedback system, otherwise not starting can feedback system.
In the present embodiment, DC grid floating voltage value U in step S2oBy AC network actual voltage value UabcAccording to
The no-load voltage ratio conversion of rectifier transformer obtains.Floating gate threshold value in step S2 is calculated by formula (1):
In formula (1), UfFor floating gate threshold value, UabcFor AC network actual voltage value, Uabc1It is empty for preset AC network
Carry voltage value, UoFor DC grid floating voltage value, UnFor preset starting threshold desired value.In the present embodiment, preset to open
Dynamic threshold value is threshold value set by host computer.
In the present embodiment, in step S3, power grid is in light condition and is judged according to formula (2), and electricity is determined when formula (2) is set up
Net is in light condition,
In formula (2), UdFor DC grid actual voltage value, UabcFor AC network actual voltage value, Uabc1For preset friendship
Galvanic electricity net floating voltage value, UoFor DC grid floating voltage value, X is that preset zero load judges threshold value.When DC grid
When network pressure grade is DC1500V, preset zero load judges the value range of threshold value X for [20,40].Starting can present in step S3
System is that starting can feedback system after being delayed the preset time.In the present embodiment, delay time is set as 100 milliseconds.
In the present embodiment, floating gate threshold value is verified with a specific example, the AC network of municipal rail train is 35kV
Power grid, i.e. Uabc=35000V converts to obtain DC grid floating voltage value to be DC1670V, i.e., according to the no-load voltage ratio of rectifier transformer
Uo=1670V, threshold value set by host computer are 1750V, i.e. Un=1750V, DC grid are DC1500V power grid, AC network
Floating voltage value is 35.8kV, i.e. Uabc1=35800V, certainly, AC network floating voltage value can be carried out according to the actual situation
Adjustment.Consider that the load in evening on AC network daytime is different, power grid has ± 5% fluctuation, substitutes into formula (1), can be calculated
The fluctuation range of floating gate threshold value is 1666.5≤Uf≤ 1833.5, the floating range of floating gate threshold value has reached 167V, can expire
Sufficient power network fluctuation requirement, can effectively prevent the error starting of energy feedback system.
The present invention has and can judge automatically power grid and whether be in light condition, and by setting floating gate threshold value, can be effective
It solves the problems, such as that it is unnecessary to reduce equipment using energy feedback system error starting is caused under fixed threshold value mode because of voltage ripple of power network
Loss and energy consumption, effectively improve entirely can feedback system economic indicator；Additionally by the mode of floating threshold, according to network pressure reality
Border situation selects optimal starting threshold, further increases system response time, guarantees feedback system and plays maximum effect.
As shown in figure 4, energy feedback system starting control system of the present embodiment based on floating gate threshold value includes: measurement module:
For obtaining AC network actual voltage value Uabc, DC grid actual voltage value Ud；Computing module: for calculating DC grid
Floating voltage value UoWith floating gate threshold value Uf；Start control module: for working as DC grid actual voltage value UdGreater than floating threshold
Value UfAnd power grid is when being in non-light condition, starting can feedback system, otherwise not starting can feedback system.
Above-mentioned only presently preferred embodiments of the present invention, is not intended to limit the present invention in any form.Although of the invention
It has been disclosed in a preferred embodiment above, however, it is not intended to limit the invention.Therefore, all without departing from technical solution of the present invention
Content, technical spirit any simple modifications, equivalents, and modifications made to the above embodiment, should all fall according to the present invention
In the range of technical solution of the present invention protection.
Claims (6)
1. a kind of energy feedback system based on floating gate threshold value starts control method, which comprises the steps of:
S1. AC network actual voltage value U is obtainedabc, DC grid actual voltage value Ud；
S2. DC grid floating voltage value U is calculatedoWith floating gate threshold value Uf；
S3. as the DC grid actual voltage value UdGreater than the floating gate threshold value UfAnd power grid opens when being in non-light condition
Kinetic energy feedback system, otherwise not starting can feedback system；
Floating gate threshold value in the step S2 is calculated by formula (1):
In formula (1), UfFor floating gate threshold value, UabcFor AC network actual voltage value, Uabc1For the unloaded electricity of preset AC network
Pressure value, UoFor DC grid floating voltage value, UnFor preset starting threshold desired value.
2. the energy feedback system according to claim 1 based on floating gate threshold value starts control method, it is characterised in that: described
DC grid floating voltage value U in step S2oBy AC network actual voltage value UabcIt is converted according to the no-load voltage ratio of rectifier transformer
Out.
3. the energy feedback system according to claim 2 based on floating gate threshold value starts control method, it is characterised in that: described
In step S3, power grid is in light condition and is judged according to formula (2), determines that power grid is in light condition when formula (2) is set up,
In formula (2), UdFor DC grid actual voltage value, UabcFor AC network actual voltage value, Uabc1For preset alternating current
Net floating voltage value, UoFor DC grid floating voltage value, X is that preset zero load judges threshold value.
4. the energy feedback system according to claim 3 based on floating gate threshold value starts control method, it is characterised in that: when straight
When the network pressure grade of galvanic electricity net is DC1500V, the preset zero load judges the value range of threshold value X for [20,40].
5. the energy feedback system according to claim 4 based on floating gate threshold value starts control method, it is characterised in that: described
The feedback system of starting energy described in step S3 is that starting can feedback system after being delayed the preset time.
6. a kind of energy feedback system based on floating gate threshold value starts control system characterized by comprising
Measurement module: for obtaining AC network actual voltage value Uabc, DC grid actual voltage value Ud；
Computing module: for calculating DC grid floating voltage value UoWith floating gate threshold value Uf；
Start control module: for working as the DC grid actual voltage value UdGreater than the floating gate threshold value UfAnd power grid is in
When non-light condition, starting energy feedback system, otherwise not starting can feedback system；
The floating gate threshold value passes through formulaIt is calculated, in formula, UfFor floating gate threshold value, UabcFor
AC network actual voltage value, Uabc1For preset AC network floating voltage value, UoFor DC grid floating voltage value, UnFor
Preset starting threshold desired value.
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| CN107264340B (en) * | 2017-06-26 | 2019-05-24 | 厦门科华恒盛股份有限公司 | A method of for selecting the control strategy of energy feedback system current transformer |
| CN107776438B (en) * | 2017-09-20 | 2019-03-19 | 北京市轨道交通建设管理有限公司 | The anti-loop process of urban track traffic traction power supply and system |
| CN109664768B (en) * | 2017-10-13 | 2021-06-25 | 株洲中车时代电气股份有限公司 | Overvoltage chopping energy consumption balance control method, system and device and readable storage medium |
| CN110034556B (en) * | 2019-03-27 | 2020-05-08 | 沈阳微控新能源技术有限公司 | Regenerative braking energy recovery control method, system and device |
| CN110654272B (en) * | 2019-09-30 | 2022-09-16 | 南京亚派科技股份有限公司 | Method for preventing false start between adjacent stations of subway energy feedback device |
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| CN101058296A (en) * | 2006-04-30 | 2007-10-24 | 湘潭市恒信电气有限公司 | Input judgement method and device for regeneration braking absorbing instrument |
| CN104201719A (en) * | 2014-09-09 | 2014-12-10 | 南京南瑞继保电气有限公司 | Locomotive regeneration electric energy feedback device and control method thereof |
| CN105449648A (en) * | 2015-11-19 | 2016-03-30 | 南方电网科学研究院有限责任公司 | Optimization method for traveling wave protection characteristic quantity floating threshold of extra-high voltage direct current line |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101058296A (en) * | 2006-04-30 | 2007-10-24 | 湘潭市恒信电气有限公司 | Input judgement method and device for regeneration braking absorbing instrument |
| CN104201719A (en) * | 2014-09-09 | 2014-12-10 | 南京南瑞继保电气有限公司 | Locomotive regeneration electric energy feedback device and control method thereof |
| CN105449648A (en) * | 2015-11-19 | 2016-03-30 | 南方电网科学研究院有限责任公司 | Optimization method for traveling wave protection characteristic quantity floating threshold of extra-high voltage direct current line |
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