阅读说明：本技术 再生制动能量储能协调控制方法及系统 (Regenerative braking energy storage coordination control method and system ) 是由 桑佳楠 刘春松 王结飞 郭伟 于 2021-09-07 设计创作，主要内容包括：本发明公开了一种再生制动能量储能协调控制方法,包括：获取待协调控制的牵引站内再生制动能量电容储能装置的协调控制请求；判断待协调控制的牵引站相邻的牵引站内再生制动能量电容储能装置的电容状态,根据其电容储能状态对待协调控制的牵引站进行功率支援,本发明当某站再生制动能量电容储能装置因故障、检修而退出运行或者达到最大吸收功率时,本站电容储能装置的控制系统将装置退出或者满功率的信息,通过站间联络光纤传输给相邻站的电容储能装置,进行功率支援,最大限度稳定直流网压,降低车载电阻和闸瓦的启动概率。(The invention discloses a regenerative braking energy storage coordination control method, which comprises the following steps: acquiring a coordination control request of a regenerative braking energy capacitive energy storage device in a traction station to be coordinated and controlled; the method comprises the steps of judging the capacitance state of a regenerative braking energy capacitance energy storage device in a traction station adjacent to the traction station to be coordinated and controlled, and carrying out power support on the traction station to be coordinated and controlled according to the capacitance energy storage state.)

1. A regenerative braking energy storage coordination control method is characterized by comprising the following steps:

acquiring a coordination control request of a regenerative braking energy capacitive energy storage device in a traction station to be coordinated and controlled;

and judging the capacitance state of the regenerative braking energy capacitance energy storage device in the adjacent traction station of the traction station to be coordinately controlled, and carrying out power support on the traction station to be coordinately controlled according to the capacitance energy storage state.

2. The regenerative braking energy storage coordination control method according to claim 1, wherein when the triggering condition of the coordination control request of the regenerative braking energy capacitive energy storage device in the traction station to be coordinated controlled is that any one of the following conditions is satisfied:

the capacitor voltage of the regenerative braking energy capacitor energy storage device in the traction station to be coordinately controlled reaches the upper limit value, and the direct-current traction network voltage continues to rise;

and the regenerative braking energy capacitive energy storage device in the traction station to be coordinately controlled stops running due to failure or maintenance.

3. The regenerative braking energy storage coordination control method according to claim 1, characterized in that: the power support of the traction station to be coordinately controlled according to the capacitance state of the regenerative braking energy capacitance energy storage device in the adjacent traction station comprises the following steps:

step one, judging whether the capacitor voltage of a regenerative braking energy capacitor energy storage device in a traction station adjacent to the traction station to be coordinately controlled is smaller than an adjustment capacity threshold value, if so, taking the adjacent traction station as an adjustment station, and executing step two, otherwise, executing step three;

step two, reducing the starting threshold value of the regenerative braking energy capacitive energy storage device in the regulating station by V₁Entering the step four;

step three, judging whether the capacitor voltage of the internal regenerative braking energy capacitor energy storage device of the next traction station adjacent to the adjacent traction station is smaller than the regulation capacity threshold value, if so, taking the traction station as a regulation station, and executing step two, otherwise, executing step one;

and step four, judging whether the coordination control request instruction of the regenerative braking energy capacitive energy storage devices in the traction station to be subjected to coordination control disappears, if so, recovering the starting threshold of the regenerative braking energy capacitive energy storage devices in each regulating station, exiting the coordination control, and if not, executing the step one again.

4. The regenerative braking energy storage coordination control method according to claim 1, wherein said activation threshold is decreased by V₁＝20。

5. The regenerative braking energy storage coordination control method according to claim 1, wherein said second step is executed more than 3 times.

6. A regenerative braking energy storage coordination control system, comprising:

the control request acquisition module is used for acquiring a coordination control request of a regenerative braking energy capacitive energy storage device in the traction station to be coordinated and controlled;

and the coordination control module is used for judging the capacitance state of the regenerative braking energy capacitance energy storage device in the adjacent traction station of the traction station to be coordinated and controlled and carrying out power support on the traction station to be coordinated and controlled according to the capacitance energy storage state.

7. A regenerative braking energy storage coordination control system, comprising: comprising a memory and a processor;

the memory is to store instructions;

the processor is configured to operate in accordance with the instructions to perform the steps of the method according to any one of claims 1 to 4.

Technical Field

The invention belongs to the technical field of regenerative braking, and particularly relates to a regenerative braking energy storage coordination control method and system.

Background

In the running process of urban rail transit, due to the fact that the weight of the urban rail transit is large and the running speed is high, a large amount of braking energy can be generated by frequent braking, and if the braking energy is not absorbed and utilized, the voltage of a direct-current contact network can be rapidly raised, and the running safety of the rail transit is threatened. At present, most of urban rail transit at home and abroad consumes braking energy by installing a resistance absorption device, the scheme converts the braking energy into heat energy to be consumed, and the energy is not effectively utilized. The braking energy capacitor energy storage device increases or decreases the direct current voltage to a controllable range through the converter in a chopping mode and stores the direct current voltage in the super capacitor, so that redundant braking energy is absorbed when a train is braked, the voltage of a direct current contact network is prevented from increasing, and the braking energy is released to supply power to the train when the train is started. The braking energy capacitor energy storage device has better voltage stabilization performance on the traction network, and can be more applied along with the upgrade of super capacitor technical materials.

In an actual operation line of urban rail transit, because the braking energy is influenced by parameters such as vehicle operation speed, passenger capacity and train arrangement density, the braking energy absorbed by different traction stations is different, but capacitive energy storage devices with the same capacity are mostly configured in actual engineering design, so that the power output of the devices of different traction stations is unbalanced and uncoordinated, namely, the capacity of some devices is not enough to absorb the braking energy, and the capacity of some devices is still surplus. On the other hand, because the energy storage element adopted by the braking energy capacitive energy storage device is a super capacitor (double electric layer capacitor), if the braking energy is obtained only through simulation in the design stage and the equipment capacity is configured according to the braking energy, the capacity redundancy is large. In addition, if it is considered that the ascending and descending trains enter the station at the same time or that a certain station equipment exits from operation due to a failure or maintenance, the equipment configuration cost is higher.

Therefore, the absorption efficiency of the regenerative braking energy capacitor energy storage device of the whole line is improved, the equipment configuration cost is reduced, and the problem to be solved is urgently needed.

Disclosure of Invention

In order to solve the problems in the prior art, the invention provides a regenerative braking energy storage coordination control method which can improve the absorption efficiency of a regenerative braking energy capacitive energy storage device.

The technical problem to be solved by the invention is realized by the following technical scheme:

in a first aspect, a regenerative braking energy storage coordination control method includes:

acquiring a coordination control request of a regenerative braking energy capacitive energy storage device in a traction station to be coordinated and controlled;

and judging the capacitance state of the regenerative braking energy capacitance energy storage device in the adjacent traction station of the traction station to be coordinately controlled, and carrying out power support on the traction station to be coordinately controlled according to the capacitance energy storage state.

With reference to the first aspect, further, when a triggering condition of a coordination control request of a regenerative braking energy capacitive energy storage device in the traction station to be coordinately controlled is that any one of the following conditions is satisfied:

the capacitor voltage of the regenerative braking energy capacitor energy storage device in the traction station to be coordinately controlled reaches the upper limit value, and the direct-current traction network voltage continues to rise;

and the regenerative braking energy capacitive energy storage device in the traction station to be coordinately controlled stops running due to failure or maintenance.

With reference to the first aspect, further, the power support of the traction station to be coordinately controlled according to the capacitance state of the regenerative braking energy capacitive energy storage device in the adjacent traction station includes:

step one, judging whether the capacitor voltage of a regenerative braking energy capacitor energy storage device in a traction station adjacent to the traction station to be coordinately controlled is smaller than an adjustment capacity threshold value, if so, taking the adjacent traction station as an adjustment station, and executing step two, otherwise, executing step three;

step two, reducing the starting threshold value of the regenerative braking energy capacitive energy storage device in the regulating station by V₁Entering the step four;

step three, judging whether the capacitor voltage of the internal regenerative braking energy capacitor energy storage device of the next traction station adjacent to the adjacent traction station is smaller than the regulation capacity threshold value, if so, taking the traction station as a regulation station, and executing step two, otherwise, executing step one;

and step four, judging whether the coordination control request instruction of the regenerative braking energy capacitive energy storage devices in the traction station to be subjected to coordination control disappears, if so, recovering the starting threshold of the regenerative braking energy capacitive energy storage devices in each regulating station, exiting the coordination control, and if not, executing the step one again.

With reference to the first aspect, further, the second step is performed more than 3 times.

With reference to the first aspect, further, the starting threshold is decreased by V₁＝20。

In a second aspect, a regenerative braking energy storage coordination control system is provided, which includes:

the control request acquisition module is used for acquiring a coordination control request of a regenerative braking energy capacitive energy storage device in the traction station to be coordinated and controlled;

and the coordination control module is used for judging the capacitance state of the regenerative braking energy capacitance energy storage device in the adjacent traction station of the traction station to be coordinated and controlled and carrying out power support on the traction station to be coordinated and controlled according to the capacitance energy storage state.

In a third aspect, a regenerative braking energy storage coordination control system is further provided, including: comprising a memory and a processor;

the memory is to store instructions;

the processor is configured to operate in accordance with the instructions to perform the steps of the method according to any one of the first aspect.

The beneficial effects of the invention include: when the regenerative braking energy capacitive energy storage device in a certain station quits operation or reaches the maximum absorption power due to faults and maintenance, the control system of the capacitive energy storage device in the station transmits the information of the quitting or full power of the device to the capacitive energy storage device in an adjacent station through the communication optical fiber between the stations for power support, so that the direct current network voltage is stabilized to the maximum extent, and the starting probability of the vehicle-mounted resistor and the brake shoe is reduced.

The fully-mechanized protection devices adopt a Goose communication protocol, peer-to-peer control is performed among all control systems, a central processing unit is not required to be configured, only switching value transmission is performed, ms-level communication can be achieved, and response speed of coordination control is greatly improved.

Drawings

FIG. 1 is a flow chart of a regenerative braking energy storage coordination control method of the present invention;

FIG. 2 is a schematic structural diagram of a regenerative braking energy storage coordination control system in the invention.

Detailed Description

To further describe the technical features and effects of the present invention, the present invention will be further described with reference to the accompanying drawings and detailed description.

In order to implement the regenerative braking energy storage coordination control method, each traction station is provided with a regenerative braking energy capacitive energy storage device, a comprehensive protection device and an exchanger, the traction stations are mutually connected through the exchangers to form a ring network or a chain network, the traction stations are connected by a Goose communication protocol, only switching value transmission is carried out, and ms-level communication can be realized. The control of the regenerative braking energy capacitive energy storage devices among the traction stations is in an equal control relationship, and no master-slave is provided.

As shown in fig. 1-2, a regenerative braking energy storage coordination control method is provided, which includes the following steps:

step one, acquiring a coordination control request of a regenerative braking energy capacitive energy storage device in a traction station to be coordinated and controlled;

and judging whether the regenerative braking energy capacitive energy storage device in the Kth (any one) traction station sends a coordination control request or not, and if so, carrying out coordination control on the regenerative braking energy capacitive energy storage device.

The trigger condition for sending out the coordination control comprises the following steps:

the first trigger condition is that the capacitor voltage V of the regenerative braking energy capacitor energy storage device in the Kth traction station reaches V_maxAnd the direct current traction network voltage VDC continues to rise;

the method specifically comprises the following steps:

the capacitor voltage V and the DC traction network voltage V_DCAnd the sampling and filtering are carried out by the sampling board and then are transmitted to the main control board.

The main control board adds the capacitor voltage V and the upper limit set value V of the capacitor voltage in the logic operation_maxComparing and simultaneously judging V in 3 periods of sampling_DCWhether the control target value is exceeded.

The second triggering condition is that the regenerative braking energy capacitive energy storage device in the Kth traction station is out of operation due to failure and maintenance.

And after any trigger condition is met, a control system of the regenerative braking energy capacitive energy storage device in the Kth traction station sends a signal.

And step two, carrying out power support on the traction station to be coordinately controlled according to the capacitance state of the regenerative braking energy capacitance energy storage device in the adjacent traction station.

The method specifically comprises the following steps:

step 21, judging whether the capacitor voltage of the regenerative braking energy capacitor energy storage devices in the K +1 and K-1 traction stations adjacent to the traction station to be coordinated and controlled is smaller than a regulation capacity threshold value V₀If the difference is smaller, the adjacent traction station is taken as a regulating station, and the step 22 is executed, otherwise, the difference is smaller, and the step 23 is executed. K-1 and K +1 represent respectively the adjacent previous and subsequent traction stations, in case of a chain configuration it is possible to have only the previous or only the subsequent one. V₀Is lower than the upper limit value V of the capacitor voltage absorption_maxThe value of (a) should be set according to the stored energy capacity of the capacitor, and should not be set too high, and a certain voltage margin should be left; nor can it be set too low or otherwise the coordinated control request cannot be accurately responded to.

Step 22, adjusting a starting threshold V of the regenerative braking energy capacitive energy storage device in the station_inBy 20V (empirical value), delay t₁Step 24 is entered; the number of times this step is performed cannot exceed 3 times.

Wherein, V_inIn order to realize the starting threshold of the regenerative braking energy capacitive energy storage device for the voltage rise of the direct current contact network, taking a 750V direct current system as an example, the charging starting threshold V_inWhen the voltage of the direct current overhead line system is increased to 850V (changed according to actual conditions), the device starts and absorbs braking energy.

t₁Of valueThe setting is to give a certain action time to the equipment responding to the coordination command and avoid the calculation disorder of the control system, and the time setting is ms level and is set according to experience.

Step 23, judging whether the capacitor voltage of the internal regenerative braking energy capacitor energy storage device of the next traction station (K-2 and K +2) adjacent to the adjacent traction station is smaller than the regulation capacity threshold value V₀If the value is less than the preset value, the traction station is taken as an adjusting station, and the step 22 is executed, otherwise, the step 21 is executed.

And 24, judging whether a coordination control request instruction of the regenerative braking energy capacitive energy storage devices in the traction station to be subjected to coordination control disappears, if so, recovering the starting threshold of the regenerative braking energy capacitive energy storage devices in each regulating station, exiting the current coordination control, and if not, executing the step 21 again.

The invention also provides a regenerative braking energy storage coordination control system, which comprises:

the control request acquisition module is used for acquiring a coordination control request of a regenerative braking energy capacitive energy storage device in the traction station to be coordinated and controlled;

and the coordination control module is used for judging the capacitance state of the regenerative braking energy capacitance energy storage device in the adjacent traction station of the traction station to be coordinated and controlled and carrying out power support on the traction station to be coordinated and controlled according to the capacitance energy storage state.

The invention also provides a regenerative braking energy storage coordination control system, which comprises: comprising a memory and a processor;

the memory is to store instructions;

the processor is used for operating according to the instruction to execute the steps of the regenerative braking energy storage coordination control method.

As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.