CN110435485B - Operation control method, device and medium applied to inversion feedback device - Google Patents
Operation control method, device and medium applied to inversion feedback device Download PDFInfo
- Publication number
- CN110435485B CN110435485B CN201910611188.6A CN201910611188A CN110435485B CN 110435485 B CN110435485 B CN 110435485B CN 201910611188 A CN201910611188 A CN 201910611188A CN 110435485 B CN110435485 B CN 110435485B
- Authority
- CN
- China
- Prior art keywords
- voltage
- feedback device
- operation control
- direct current
- control method
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
- B60M3/00—Feeding power to supply lines in contact with collector on vehicles; Arrangements for consuming regenerative power
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Inverter Devices (AREA)
Abstract
The invention relates to an operation control method, an operation control device and an operation control medium applied to an inversion feedback device, and provides an intelligent input operation control method applied to the inversion feedback device. The invention can realize the control and regulation of the starting voltage threshold of the inversion feedback device based on the network voltage change self-adaptation, does not change the original hardware circuit, and has the advantages of simple realization method, low required cost and high real-time property.
Description
Technical Field
The invention relates to an operation control method, device and medium applied to an inversion feedback device, and belongs to the technical field of urban rail transit kinetic energy recovery.
Background
In an urban rail transit power supply system, direct-current contact network voltage is supported by a traction substation, and when a subway train brakes, mechanical energy of the direct-current contact network voltage is converted into electric energy, so that the direct-current contact network voltage is increased. When the voltage of the direct-current contact network rises and exceeds the starting threshold value of the inversion feedback device, the feedback device inverts the electric energy generated by regenerative braking into alternating-current electric energy and feeds the alternating-current electric energy back to the medium-voltage alternating-current ring network, meanwhile, the stable control of the voltage of the direct-current traction network is realized, the voltage of a direct-current bus is prevented from exceeding an allowable value, and the exertion of the regenerative braking function is fully guaranteed.
However, in the running process of the urban rail transit, the fluctuation of the alternating current power grid can bring the fluctuation of the bus voltage of the direct current contact network, and if the bus voltage of the direct current contact network exceeds the starting threshold value of the inversion feedback device due to the fluctuation, the inversion feedback device can be mistakenly thrown in.
Disclosure of Invention
The invention aims to provide an operation control method, device and medium applied to an inversion feedback device, and aims to solve the problem of misoperation of the inversion feedback device caused by the fluctuation of a rail transit alternating current power grid.
In order to achieve the above object, the scheme of the invention comprises:
the invention relates to an operation control method applied to an inversion feedback device, which comprises the following steps: 1) acquiring the voltage of the alternating current side of an alternating current power grid of a traction power supply system and the actual voltage of a direct current contact network in real time; 2) converting the AC side voltage into a DC side reference voltage of a DC contact network according to parameters on an inversion feedback line; 3) comparing the reference voltage at the direct current side with the starting threshold voltage of the inversion feedback device; 4) if the reference voltage on the direct current side is smaller than the starting threshold voltage, starting an inversion feedback device when the actual voltage of the direct current contact network reaches the starting threshold voltage; and if the reference voltage on the direct current side is greater than the starting threshold voltage, starting the inversion feedback device when the actual voltage of the direct current contact network reaches the reference voltage on the direct current side.
The invention tracks the AC network side voltage of the rail transit in real time, and adjusts the starting threshold value of the inversion feedback device in real time according to the fluctuation condition when monitoring the abnormal fluctuation of the AC network side voltage, thereby avoiding the influence of the network voltage fluctuation on the inversion device and reducing the misoperation condition of the feedback device.
The method can adjust the starting voltage threshold of the inversion feedback device based on the network voltage change, adaptively realize the adjustment control of the starting voltage threshold of the inversion feedback device, and has the advantages of simple realization method, low required cost and high real-time property.
Further, in the step 1), the alternating current grid-connected side voltage of the inversion feedback device is collected as the alternating current side voltage.
The invention tracks the AC grid-connected side voltage of the inversion feedback device in real time, the AC grid-connected side voltage of the inversion feedback device can be directly read from the system, and new hardware does not need to be changed or added, thereby further reducing the cost.
Further, in step 2), the ac-side voltage is converted into the dc-side reference voltage by the following formula:
Uref＝K×U+ΔU
wherein, UrefAnd the reference voltage on the direct current side, K are conversion coefficients determined by parameters of an inversion feedback device, U is the voltage on the alternating current side, and delta U is a preset self-adaptive deviation voltage.
The converted voltage is added with a threshold voltage, the calculation is simple, and the false start of the inversion feedback device when the alternating current network side fluctuates can be effectively prevented.
The invention relates to an inversion feedback device, which comprises a controller, wherein the controller is in control connection with the inversion feedback device and is used for executing instructions for realizing the operation control method applied to the inversion feedback device.
The method can adjust the starting voltage threshold of the inversion feedback device based on the network voltage change, adaptively realize the adjustment control of the starting voltage threshold of the inversion feedback device, and has the advantages of simple realization method, low required cost and high real-time property.
The computer storage medium of the present invention stores a program for implementing the operation control method applied to the inverter feedback device as described above.
The method can adjust the starting voltage threshold of the inversion feedback device based on the network voltage change, adaptively realize the adjustment control of the starting voltage threshold of the inversion feedback device, and has the advantages of simple realization method, low required cost and high real-time property.
Drawings
Fig. 1 is a schematic diagram of system access of an inverter feedback device according to the present invention;
fig. 2 is a flow chart of an operation control method of the inversion feedback device of the invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The method comprises the following steps:
the rail transit traction system shown in fig. 1 includes a 35kv medium voltage ring network (AC35kV medium voltage ring network) connected to a traction substation, and a 1.5 kv DC contact network (DC1500V DC bus) for directly driving a locomotive; the 35kV medium-voltage ring network is connected with a 1.5 kV direct-current contact network through alternating-current and direct-current conversion power supply, the 1.5 kV direct-current contact network is connected with an inversion feedback device, and the inversion feedback device is connected into the alternating-current 35kV medium-voltage ring network through a 35kV/900V energy feedback transformer.
As shown in fig. 2, the operation control method of the inverter feedback device includes the following steps: monitoring the AC grid-connected side voltage U of the inversion feedback device in real time, wherein the AC grid-connected side voltage U can be obtained from an AC port of a converter cabinet; or the energy can be obtained from a 35kV medium-voltage ring network and converted to 35kV/900V energy to feed the low-voltage side of the transformer. And then converting the alternating current grid-connected side voltage U into a direct current side voltage of the inverter feedback device according to the proportional relation of K multiplied by U plus delta U, and using the direct current side voltage as a direct current side reference voltage Uref.
As another embodiment, the ac voltage of the 35kV medium voltage ring network may be sampled by the voltage transformer, and the dc voltage on the dc contact network side may be converted by the parameters of the 35kV/900V energy feeding transformer and the inverter feedback device as the dc side reference voltage Uref.
Comparing the preset threshold voltage Uset for starting the inversion feedback device with the magnitude of the direct current reference voltage Uref in real time in a program; if Uset is larger than Uref, then Uset is continuously used as the threshold voltage for starting the inversion feedback device, namely when the voltage on the direct current contact network side reaches Uset, the inversion feedback device is controlled to be operated; and if Uset is less than or equal to Uref, updating the threshold voltage for starting the inversion feedback device to Uref, namely controlling the inversion feedback device to be operated when the voltage value on the direct current contact network side reaches Uref.
In this embodiment, the preset threshold voltage for starting the inverter feedback device is Uset 1720V, and the linear conversion relationship model between the real-time sampling voltage and the dc contact network side voltage is as follows:
Uref＝K×U+ΔU
k is a conversion coefficient, U is the voltage of an alternating current port of the converter cabinet, and delta U is self-adaptive deviation voltage; the calculation method of the conversion coefficient K is the prior art, and the self-adaptive deviation voltage delta U is set according to the condition of a traction system power grid.
Taking the rated voltage 900V of the medium-voltage 35kV alternating-current ring network and the alternating-current side port of the converter cabinet as an example, K is calculated to be (1.41 × 1180/900) ≈ 1.84(1.41 is a proportionality coefficient of a diode rectifying circuit), the self-adaptive deviation voltage is defaulted to 50V, and then a linear conversion relation model of the real-time sampling voltage and the direct-current contact network side voltage under the working condition is Uref ═ 1.84U + 50.
The embodiment of the device is as follows:
the inversion feedback device comprises a controller, wherein the controller is in control connection with the inversion feedback device, acquires an alternating current grid-connected side voltage U and a direct current contact grid side voltage from a system or other sensors in real time, and controls the operation of the inversion feedback device according to an operation control method of the inversion feedback device. The operation control method of the inverter feedback device is sufficiently clear in the embodiment of the method, and is not described herein again.
Computer storage medium embodiments:
the computer storage medium stores a program for realizing the operation control method of the inversion feedback device, and the program for realizing the operation control method of the inversion feedback device is executed by at least one processor to realize the operation control method of the inversion feedback device.
The media referred to in this embodiment is programmable data processing apparatus having stored thereon computer program instructions. For example, it may be a controller integrated with a memory, and/or other separate memories, internal memories. The media described above may also be one or more computer-readable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.
Claims (5)
1. An operation control method applied to an inversion feedback device is used for an urban rail transit direct current traction power supply system and is characterized by comprising the following steps: 1) acquiring the voltage of the alternating current side of an alternating current power grid of a traction power supply system and the actual voltage of a direct current contact network in real time; 2) converting the AC side voltage into a DC side reference voltage of a DC contact network according to parameters on an inversion feedback line; 3) comparing the reference voltage at the direct current side with the starting threshold voltage of the inversion feedback device; 4) if the reference voltage on the direct current side is smaller than the starting threshold voltage, starting an inversion feedback device when the actual voltage of the direct current contact network reaches the starting threshold voltage; and if the reference voltage on the direct current side is greater than the starting threshold voltage, starting the inversion feedback device when the actual voltage of the direct current contact network reaches the reference voltage on the direct current side.
2. The operation control method applied to the inverter feedback device according to claim 1, wherein in the step 1), an ac grid-connected side voltage of the inverter feedback device is collected as the ac side voltage.
3. The operation control method applied to the inverter feedback device according to claim 2, wherein in the step 2), the ac side voltage is converted into the dc side reference voltage by the following formula:
Uref＝K×U+ΔU
wherein, UrefIs the DC side reference voltage and K is an inversion feedback deviceAnd the conversion coefficient determined by the parameters, U, the AC side voltage and delta U are preset self-adaptive deviation voltages.
4. An inverter feedback device, comprising a controller, wherein the controller is connected to the inverter feedback device, and is characterized in that the controller is used for executing instructions for implementing the operation control method applied to the inverter feedback device as claimed in any one of claims 1 to 3.
5. A computer storage medium storing a program for implementing the operation control method applied to the inverter feedback device according to any one of claims 1 to 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910611188.6A CN110435485B (en) | 2019-07-08 | 2019-07-08 | Operation control method, device and medium applied to inversion feedback device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910611188.6A CN110435485B (en) | 2019-07-08 | 2019-07-08 | Operation control method, device and medium applied to inversion feedback device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110435485A CN110435485A (en) | 2019-11-12 |
| CN110435485B true CN110435485B (en) | 2021-04-16 |
Family
ID=68429832
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910611188.6A Active CN110435485B (en) | 2019-07-08 | 2019-07-08 | Operation control method, device and medium applied to inversion feedback device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110435485B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111509771A (en) * | 2020-04-21 | 2020-08-07 | 西安许继电力电子技术有限公司 | Self-adaptive feedback control method and device for subway regenerative braking energy feedback device |
| CN113422397B (en) * | 2021-06-22 | 2023-01-20 | 思源清能电气电子有限公司 | Automatic control method for energy feedback and rectification of flexible traction power supply device |
| CN113625809B (en) * | 2021-07-28 | 2022-10-28 | 日立电梯（中国）有限公司 | Bus voltage threshold calculation method and bus voltage control method |
| CN114447907B (en) * | 2022-01-10 | 2023-06-27 | 西南交通大学 | Control method of regenerative braking energy device for direct-current traction power supply system |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20000055056A (en) * | 1999-02-03 | 2000-09-05 | 김형벽 | Output voltage compensation system of the VVVF inverter for the line ripple voltage |
| CN100338870C (en) * | 2004-06-23 | 2007-09-19 | 河北工业大学电工厂 | High-slip frequency speed-adjusting method and its mechanism |
| 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 |
| CN206568919U (en) * | 2017-01-18 | 2017-10-20 | 西南交通大学 | Urban track traffic regeneration energy inverting device based on dSPACE |
| CN109004673B (en) * | 2018-08-08 | 2021-12-14 | 南京亚派科技股份有限公司 | Direct-current voltage detection and control method for subway regenerative energy feedback device |
-
2019
- 2019-07-08 CN CN201910611188.6A patent/CN110435485B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN110435485A (en) | 2019-11-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110435485B (en) | Operation control method, device and medium applied to inversion feedback device | |
| CN103986403B (en) | Frequency conversion speed-adjusting system and method | |
| CN103501135B (en) | High voltage converter braking deceleration protection system and method | |
| CN103986339B (en) | Power conversion system, voltage modulation device and its method | |
| CN105531922B (en) | System and method for control regeneration energy in being driven in adjustable speed | |
| US9780709B2 (en) | System and method for optimizing wind turbine operation | |
| CN109955739B (en) | Train bow net offline crossing control device, system and method | |
| CN105322772A (en) | System and method for protecting a power converter during an adverse voltage event | |
| RU2492072C1 (en) | Electric rolling stock electric power converter | |
| CN108039730B (en) | Control system and control method of subway energy feedback device | |
| Meshcheryakov et al. | The active energy filter for compensation of harmonic distortion in motor soft starter | |
| CN110654272B (en) | Method for preventing false start between adjacent stations of subway energy feedback device | |
| EP3264559A1 (en) | Controlling operation of a power converter based on grid conditions | |
| CN104428158A (en) | Method for controlling AC electric vehicle | |
| JP2005223999A (en) | Power controller for elevator facility | |
| JP2011051558A (en) | Superconductive direct current feeding system and direct current feeding method | |
| JP5458613B2 (en) | Regenerative countermeasure device and control method of the regenerative countermeasure device | |
| CN103350935A (en) | Energy-saving control system | |
| CN109474169B (en) | MMC direct-current side fault current control method based on direct-current voltage fuzzy control | |
| JP3144848B2 (en) | Power converter for electric vehicles | |
| US10355629B2 (en) | Control method for protecting generators | |
| KR100744482B1 (en) | Device for stabilizing dc link voltage of regenerative inverter for dc traction system | |
| CN116545040B (en) | Active current control method, device and system in low voltage ride through and storage medium | |
| CN220190523U (en) | Airport escalator power supply device | |
| CN216134434U (en) | Rail transit vehicle renewable energy converter and feedback system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |