CN110126667A - A kind of locomotive can present the Working mode switching method of device - Google Patents
A kind of locomotive can present the Working mode switching method of device Download PDFInfo
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- CN110126667A CN110126667A CN201910318056.4A CN201910318056A CN110126667A CN 110126667 A CN110126667 A CN 110126667A CN 201910318056 A CN201910318056 A CN 201910318056A CN 110126667 A CN110126667 A CN 110126667A
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- mode
- present
- present device
- setting value
- reactive compensation
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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
- B60L55/00—Arrangements for supplying energy stored within a vehicle to a power network, i.e. vehicle-to-grid [V2G] arrangements
-
- 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
- B60L2200/00—Type of vehicles
- B60L2200/26—Rail vehicles
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The application provides the Working mode switching method that a kind of locomotive can present device, between the ac bus and DC bus that can present device access AC network low-pressure side.The described method includes: detecting the inlet wire current of the AC network low-pressure side；Detect the operating mode that can present device；In response to the inlet wire current of the AC network low-pressure side, to be less than preset first setting value and the operating mode that can present device be feedback mode, by the operating mode that can present device from the feedback pattern switching be reactive compensation mode；In response to the AC network low-pressure side inlet wire current is not less than first setting value and the operating mode that can present device is reactive compensation mode, by the operating mode that can present device from the reactive compensation pattern switching be feedback mode.The method that embodiments herein proposes, it is realized using DC charging circuit automatic " soft handover " of feedback mode and reactive compensation mode, no current impacts in handoff procedure, high reliablity, reduce the operation element of metro operation personnel, while also increasing locomotive to present the service life of device.
Description
Technical field
This application involves high-power electric and electronic technical fields, and in particular to a kind of operating mode that locomotive can present device is cut
Change method.
Background technique
Locomotive can present occasion of the device for absorption and the feedback of regenerative electric energy in rail traffic, extremely by regenerative electric energy feedback
Power grid.
The principle that locomotive can present device can be summarized as follows: when vehicle enters damped condition, the kinetic energy of locomotive is converted to electric energy,
When to DC grid inputing power, DC grid voltage can be caused to increase.The control system real-time detection direct current of device can be presented
Net voltage, when the rising of DC grid voltage reaches a certain preset value, inverter starts to start, and inverter is with actual direct current
The difference of net voltage and a reference value control output electric current, the maximum allowable output electric current of inverter is reached until exporting electric current, inverse
Become device to AC network feedback electric energy, DC grid voltage will have a declining tendency.After vehicle completes braking, inverter traction
Operation, DC current direction change, and can present device and be latched rapidly into standby mode.Therefore, device can be presented to be not only able to
DC grid voltage is maintained to keep stablizing, moreover it is possible to by extra electric energy feedback to AC network.
Locomotive can present device generally has two kinds of operating modes of feedback and reactive compensation, by taking subway as an example, wherein daytime
The active power of iron operation is larger, and main institute's power factor is higher, and locomotive can present device and work in feedback mode, by locomotive brake
Energy is transmitted to metro traction AC network by metro traction direct current net for the use of subway station internal loading.And night due to subway
It stops transport, active power is smaller, and main institute's power factor is lower, and locomotive can present device and work in reactive compensation mode, and master can be improved
Power factor, avoid power factor is too low from causing to impose a fine.
Inventors have found that generalling use manual switching mode, and needed when pattern switching by machine in both of which switching
Vehicle can present device shutdown, and frequent start and stop operation will affect the breaker service life, and increase the work of operation personnel.
Summary of the invention
The purpose of the application is to provide a kind of operating mode that the locomotive for having no-power compensation function concurrently can present device and cuts automatically
Method is changed, to solve the problems, such as that it is heavy that the reduction of equipment life caused by current manual switching mode and operation personnel work.
The embodiment of the present application, which provides a kind of locomotive, can present the Working mode switching method of device, described to present device access
Between the ac bus and DC bus of AC network low-pressure side, which comprises detect the AC network low-pressure side
Inlet wire current；Detect the operating mode that can present device；It is less than in advance in response to the inlet wire current of the AC network low-pressure side
If the first setting value and the operating mode that device can be presented be feedback mode, by the operating mode that can present device from institute
Stating feedback pattern switching is reactive compensation mode；It is not less than described first in response to the inlet wire current of the AC network low-pressure side
Setting value and the operating mode that can present device are reactive compensation mode, by the operating mode that can present device from the nothing
Function compensation model is switched to feedback mode.
As one aspect of the present invention, wherein the device that can present includes DC loop, the DC loop includes simultaneously
Join the charge circuit and bypass loop of connection, the bypass loop includes direct current main contactor, and described by the energy feedback dress
The operating mode set from the feedback pattern switching be reactive compensation mode, comprising: locking it is described can present device, make it is described can feedback
Device works in standby mode；Detect the electric current of the direct current main contactor；It is small in response to the electric current of the direct current main contactor
In preset second setting value, the direct current main contactor is disconnected；It adjusts the DC voltage that can present device and reaches preset
Third setting value；It controls the device that can present and enters reactive compensation mode, carry out idle benefit according to preset reactive compensation target
It repays.
As one aspect of the present invention, wherein the device that can present includes DC loop, the DC loop includes simultaneously
Join the charge circuit and bypass loop of connection, the charge circuit includes DC charging contactor, and the bypass loop includes straight
Flow main contactor, and it is described by the operating mode that can present device from the reactive compensation pattern switching be feedback mode,
Device can be presented by including: that locking is described, and the device that can present is made to work in standby mode；It is closed the DC charging contactor, it is right
The capacitor charging that device can be presented；Detect the DC voltage that can present device；In response to the direct current that can present device
Pressure is greater than preset 4th setting value, is closed the direct current main contactor；DC charging contactor described in disjunction makes the energy feedback
Device enters feedback mode.
As one aspect of the present invention, the device that can present further includes the inversion being connected in series with the DC loop
Device, and it is described locking it is described can present device, make it is described can present device work in standby mode, comprising: locking it is described can feedback dress
The switch block for the inverter set makes the device that can present work in standby mode.
As one aspect of the present invention, the switch block of the inverter includes IGBT.
As one aspect of the present invention, first setting value is between 40A and 100A.
As one aspect of the present invention, second setting value is between 2A and 10A.
As one aspect of the present invention, the third setting value is between 1500V and 2000V.
As one aspect of the present invention, the 4th setting value is between 1200V and 1800V.
As one aspect of the present invention, the reactive compensation target includes alternating voltage or power factor or idle function
Rate.
The method that embodiments herein proposes, realizes feedback mode and reactive compensation mode using DC charging circuit
Automatic " soft handover ", no current impact, high reliablity reduce the operation element of metro operation personnel, together in handoff procedure
When also increase locomotive and can present the service life of device.
Detailed description of the invention
In order to more clearly explain the technical solutions in the embodiments of the present application, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, the drawings in the following description are only some examples of the present application, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is that a kind of locomotive that one embodiment of the application provides can present device access system schematic diagram；
Fig. 2 shows for the operating mode automatic switching method process that a kind of locomotive that one embodiment of the application provides can present device
It is intended to；
Fig. 3 is the operating mode automatic switching method process that a kind of locomotive that one embodiment of the application provides can present device
Figure.
Specific embodiment
To keep the purposes, technical schemes and advantages of the embodiment of the present application clearer, below with reference to drawings and examples,
The specific embodiment progress of technical scheme in further detail, is clearly illustrated.However, specific implementations described below
Mode and embodiment are for illustrative purposes only, rather than the limitation to the application.It only contains the implementation of the application a part
Example, instead of all the embodiments, the other embodiments that those skilled in the art obtain the various change of the application all belong to
In the range of the application protection.
Fig. 1 is that a kind of locomotive that one embodiment of the application provides can present device access system schematic diagram.As shown in Figure 1, handing over
Galvanic electricity net high-pressure side is 110KV power supply, and AC network low-pressure side is 35KV power supply.Or AC network high-pressure side is 35KV electricity
Source, AC network low-pressure side are 10KV power supply.But it is not limited thereto.In the present embodiment, the DC bus of DC grid point
It Lian Jie not contact net and rail.
Locomotive can present device access AC network low-pressure side ac bus in parallel with traction rectifier device 4 and DC bus it
Between, can present device includes the transformer 1 being connected in series, inverter 2, DC loop 3, and DC loop 3 is filled including what is be connected in parallel
Electrical circuit and bypass loop, charge circuit include the DC charging contactor Q being connected in series1And resistance, bypass loop include straight
Flow main contactor Q2.The operating mode that locomotive can present device includes feedback mode and reactive compensation mode.
Fig. 2 shows for the operating mode automatic switching method process that a kind of locomotive that one embodiment of the application provides can present device
It is intended to, as shown in Fig. 2, operating mode automatic switching method includes the following steps.
In step s 110, AC network low-pressure side inlet wire current I is detectedac。
First current transformer is installed on AC network low-pressure side inlet wire, measures AC network low-pressure side inlet wire current
Iac, the control system that can present device receives inlet wire current Iac, it is compared with the first setting value.First setting value 40A with
Between 100A.In the present embodiment, the first setting value is set as 40A.
In the step s 120, detection can present device operating mode.
The control system of device can be presented by inner parameter, detection can present the operating mode of device.Operating mode generally wraps
Two kinds are included, one is feedback modes, and one is reactive compensation modes.
Device work can be presented in feedback mode, inverter is with the control of the difference of actual DC grid voltage and a reference value
Electric current is exported, until output electric current reaches the maximum allowable output electric current of inverter, inverter is to AC network feedback electric energy, directly
Stream network voltage will have a declining tendency.
Device work can be presented in reactive compensation mode, inverter carries out reactive compensation according to the compensation target of setting.
In step s 130, in response to the inlet wire current I of AC network low-pressure sideacLess than preset first setting value and energy
The operating mode for presenting device is feedback mode, will present the operating mode of device from feedback pattern switching be reactive compensation mode.
In the present embodiment, AC network low-pressure side inlet wire current IacLess than the first setting value 40A and device work can be presented
Mode is feedback mode, then switching feedback mode is reactive compensation mode.
In step S140, in response to the inlet wire current I of AC network low-pressure sideacNot less than the first setting value and dress can be presented
The operating mode set is reactive compensation mode, will present the operating mode of device from reactive compensation pattern switching be feedback mode.
In the present embodiment, AC network low-pressure side inlet wire current IacNot less than the first setting value 40A and device work can be presented
Operation mode is reactive compensation mode, then switching reactive compensation mode is feedback mode.
The method that embodiments herein proposes, realizes feedback mode and reactive compensation mode using DC charging circuit
Automatic " soft handover ", no current impact, high reliablity reduce the operation element of metro operation personnel, together in handoff procedure
When also increase locomotive and can present the service life of device.
Fig. 3 is the operating mode automatic switching method process that a kind of locomotive that another embodiment of the application provides can present device
Schematic diagram, as shown in figure 3, operating mode automatic switching method includes the following steps.
In step S210, AC network low-pressure side inlet wire current I is detectedac。
First current transformer is installed on AC network low-pressure side inlet wire, measures AC network low-pressure side inlet wire current
Iac, the control system that can present device receives inlet wire current Iac, it is compared with the first setting value.First setting value 40A with
Between 100A.In the present embodiment, the first setting value is 60A.
In step S220, detection can present device operating mode.
The control system of device can be presented by inner parameter, detection can present the operating mode of device.Operating mode generally wraps
Two kinds are included, one is feedback modes, and one is reactive compensation modes.
Device work can be presented in feedback mode, inverter is with the control of the difference of actual DC grid voltage and a reference value
Electric current is exported, until output electric current reaches the maximum allowable output electric current of inverter, inverter is to AC network feedback electric energy, directly
Stream network voltage will have a declining tendency.
Device work can be presented in reactive compensation mode, inverter carries out reactive compensation according to the compensation target of setting.
In step S230, in response to the inlet wire current I of AC network low-pressure sideacLess than preset first setting value 60A
And the operating mode that can present device is feedback mode, will present the operating mode of device from feedback pattern switching be reactive compensation mould
Formula.Wherein, switching feedback mode is reactive compensation mode, is included the following steps.
In step S231, locking can present device, make its work in standby mode.
Locking can present device, particularly as be can present device control system control locking can present device inverter switch
Component enables feedback device work in standby mode to be latched inverter.The switch block of inverter there are commonly but be not limited to
IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor).
In step S232, direct current main contactor Q is detected2DC current Idc。
Direct current main contactor Q is detected by the second current transformer2DC current Idc, the control system that can present device connects
Receive DC current Idc, compared with the second setting value.
In step S233, in response to direct current main contactor Q2Electric current IdcLess than the second setting value, disconnects direct current master and connect
Tentaculum Q2。
Second setting value is between 2A and 10A.In the present embodiment, the second setting value is set as 5A.Control system detection
To direct current main contactor Q2Electric current IdcWhen less than the second setting value 5A, direct current main contactor Q is disconnected2.Direct current main contactor Q2's
Electric current IdcWhen not less than the second setting value 5A, stop executing.
In step S234, the DC voltage that adjusting can present device reaches third setting value.
Judge whether the implementing result direct current main contactor Q2 of above-mentioned steps is in disjunction position, if non-disjunction, stops
It executes.If being in disjunction position, the DC voltage of device can be presented by, which adjusting, reaches third setting value.Third setting value is in 1500V
Between 2000V.In the present embodiment, third setting value is set as 2000V.Control system adjusts the DC voltage that can present device
Reach third setting value 2000V.
In step S235, control can present device and enter reactive compensation mode, carry out idle benefit according to reactive compensation target
It repays.
Reactive compensation target includes alternating voltage or power factor or reactive power.In the present embodiment, reactive compensation mesh
It is designated as power factor, then control system control can present device and enter reactive compensation mode, carry out according to target power factor idle
Compensation.
In step S240, in response to the inlet wire current I of AC network low-pressure sideacNot less than the first setting value 60A and energy
The operating mode for presenting device is reactive compensation mode, will present the operating mode of device from reactive compensation pattern switching be feedback mould
Formula.Wherein, switching reactive compensation mode is feedback mode, is included the following steps.
In step S241, locking can present device, make its work in standby mode.
Locking can present device, particularly as be can present device control system control locking can present device inverter switch
Component enables feedback device work in standby mode to be latched inverter.The switch block of inverter there are commonly but be not limited to
IGBT。
In step S242, it is closed DC charging contactor Q1, to the capacitor charging that can present device.
The control system closure DC charging contactor Q1 that device can be presented, to the capacitor charging that can present device, capacitor installation
In inverter, it is being not shown in the figure.
In step S243, detection can present the DC voltage of device.
Judge whether the implementing result DC charging contactor Q1 of above-mentioned steps is in closure position and stops if not closed
Only execute.If the DC voltage U of device can be presented by voltage transformer detection in closure positiondc1, the control of device can be presented
System processed receives the DC voltage, is compared with the 4th setting value.
In step S244, the DC voltage in response to that can present device is greater than the 4th setting value, is closed direct current main contactor
Q2。
4th setting value is between 1200V and 1800V.In the present embodiment, the 4th setting value is 1500V.It can so present
The DC voltage U of devicedc1When greater than 1500V, the control system control closure direct current main contactor Q of device can be presented2。
In step S245, disjunction DC charging contactor Q1, enable feedback device and enter feedback mode.
Judge whether the implementing result direct current main contactor Q2 of above-mentioned steps is in closure position and stops if not closed
It executes.If the control system control disjunction DC charging contactor Q of device can be presented in closure position1, judge DC charging
Contactor Q1Whether stop executing if non-disjunction in disjunction position.If being in disjunction position, enables feedback device and enter
Feedback mode.
Any one above-mentioned step executes failure, that is, thinks mode convert failed or stop executing, terminate and execute downwards.
Embodiments herein propose method, locomotive stoppage in transit after by feedback pattern switching be reactive compensation mode, can
It is idle with local compensation ac cable, the capacity of reactive power compensator is reduced, the utilization rate of device can be presented by improving locomotive.
It should be noted that each embodiment above by reference to described in attached drawing is only to illustrate the application rather than limits this
The range of application, those skilled in the art should understand that, it is right under the premise of not departing from spirit and scope
The modification or equivalent replacement that the application carries out, should all cover within the scope of the present application.In addition, signified unless the context
Outside, the word occurred in the singular includes plural form, and vice versa.In addition, unless stated otherwise, then any embodiment
All or part of in combination with any other embodiment all or part of come using.
Claims (10)
1. a kind of locomotive can present the Working mode switching method of device, the exchange that can present device access AC network low-pressure side
Between bus and DC bus, which comprises
Detect the inlet wire current of the AC network low-pressure side；
Detect the operating mode that can present device；
It is less than preset first setting value and the work that device can be presented in response to the inlet wire current of the AC network low-pressure side
Operation mode be feedback mode, by the operating mode that can present device from the feedback pattern switching be reactive compensation mode；
It is not less than first setting value and the work that device can be presented in response to the inlet wire current of the AC network low-pressure side
Operation mode be reactive compensation mode, by the operating mode that can present device from the reactive compensation pattern switching be feedback mould
Formula.
2. the DC loop includes simultaneously according to the method described in claim 1, wherein the device that can present includes DC loop
Join the charge circuit and bypass loop of connection, the bypass loop includes direct current main contactor, and described by the energy feedback dress
The operating mode set from the feedback pattern switching be reactive compensation mode, comprising:
Be latched it is described can present device, make it is described can present device work in standby mode；
Detect the electric current of the direct current main contactor；
It is less than preset second setting value in response to the electric current of the direct current main contactor, disconnects the direct current main contactor；
It adjusts the DC voltage that can present device and reaches preset third setting value；
It controls the device that can present and enters reactive compensation mode, carry out reactive compensation according to preset reactive compensation target.
3. the DC loop includes simultaneously according to the method described in claim 1, wherein the device that can present includes DC loop
Join the charge circuit and bypass loop of connection, the charge circuit includes DC charging contactor, and the bypass loop includes straight
Flow main contactor, and it is described by the operating mode that can present device from the reactive compensation pattern switching be feedback mode,
Include:
Be latched it is described can present device, make it is described can present device work in standby mode；
It is closed the DC charging contactor, to the capacitor charging that can present device；
Detect the DC voltage that can present device；
It is greater than preset 4th setting value in response to the DC voltage that can present device, is closed the direct current main contactor；
DC charging contactor described in disjunction makes the device that can present enter feedback mode.
4. according to the method in claim 2 or 3, which is characterized in that the device that can present further includes and the DC loop
The inverter of series connection, and it is described locking it is described can present device, make it is described can present device work in standby mode, comprising:
It is latched the switch block of the inverter that can present device, the device that can present is made to work in standby mode.
5. according to the method described in claim 4, wherein, the switch block of the inverter includes IGBT.
6. according to the method described in claim 1, wherein, first setting value is between 40A and 100A.
7. according to the method described in claim 2, wherein, second setting value is between 2A and 10A.
8. according to the method described in claim 2, wherein, the third setting value is between 1500V and 2000V.
9. according to the method described in claim 3, wherein, the 4th setting value is between 1200V and 1800V.
10. according to the method described in claim 2, wherein, the reactive compensation target include alternating voltage or power factor or
Reactive power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910318056.4A CN110126667B (en) | 2019-04-19 | 2019-04-19 | Working mode switching method of locomotive energy feedback device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910318056.4A CN110126667B (en) | 2019-04-19 | 2019-04-19 | Working mode switching method of locomotive energy feedback device |
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| CN110126667A true CN110126667A (en) | 2019-08-16 |
| CN110126667B CN110126667B (en) | 2021-11-12 |
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| CN103178548A (en) * | 2013-04-11 | 2013-06-26 | 华北电力大学 | Symmetrical fault ride-through control method of double-fed wind generator set |
| CN203995757U (en) * | 2014-07-14 | 2014-12-10 | 国家电网公司 | A kind of low pressure inversion feedback type traction electric power system |
| CN106099978A (en) * | 2016-07-07 | 2016-11-09 | 许继集团有限公司 | Metro braking energy back feed device, control method for reactive-load compensation |
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2019
- 2019-04-19 CN CN201910318056.4A patent/CN110126667B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1766774A (en) * | 2005-09-13 | 2006-05-03 | 中国电力科学研究院 | Method for regulating static var compensator of electricity transmission system |
| RU2376692C1 (en) * | 2008-06-09 | 2009-12-20 | Открытое акционерное общество "Научно-исследовательский институт по передаче электроэнергии постоянным током высокого напряжения" (ОАО "НИИПТ") | Combined plant for glase ice and reactive power compensation |
| CN103178548A (en) * | 2013-04-11 | 2013-06-26 | 华北电力大学 | Symmetrical fault ride-through control method of double-fed wind generator set |
| CN203995757U (en) * | 2014-07-14 | 2014-12-10 | 国家电网公司 | A kind of low pressure inversion feedback type traction electric power system |
| CN106099978A (en) * | 2016-07-07 | 2016-11-09 | 许继集团有限公司 | Metro braking energy back feed device, control method for reactive-load compensation |
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Effective date of registration: 20230518 Address after: 211102, No. 69, Su Yuan Avenue, Jiangning District, Jiangsu, Nanjing Patentee after: NR ELECTRIC Co.,Ltd. Patentee after: NR ENGINEERING Co.,Ltd. Patentee after: NR ELECTRIC POWER ELECTRONICS Co.,Ltd. Address before: 211102, No. 69, Su Yuan Avenue, Jiangning District, Jiangsu, Nanjing Patentee before: NR ELECTRIC Co.,Ltd. Patentee before: NR ENGINEERING Co.,Ltd. |
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