Train neutral section passing excitation inrush current suppression method and device and train neutral section passing system

Abstract

The invention discloses the technical field of electrified railway traction power supply, and particularly discloses a train neutral section passing excitation inrush current suppression method and device and a train neutral section passing system.The train neutral section passing excitation inrush current suppression method comprises the steps that a drive-in signal generated when a train is about to drive into a neutral section is received, and a drive-in side power supply arm and a neutral section are controlled to be conducted according to the drive-in signal; the voltage of the drive-in side power supply arm, the voltage of the drive-out side power supply arm and the voltage of the neutral section are obtained, the optimal closing angle of the thyristor is obtained by calculating the integral of the voltage of the neutral section in real time, the precision of the closing angle is remarkably improved, overvoltage and overcurrent impact on a train can be reduced to the maximum extent, practicability is higher, implementation is convenient, and popularization is easy. The popularization is convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of electrified railway traction power supply, and in particular to a method and device for suppressing train over-phase excitation surge current, and a train over-phase system. Background Art

[0002] When existing electrified railways automatically over-phase, due to overvoltage and inrush current, an overvoltage beyond the normal range is generated after the over-phase is completed, triggering the train's overvoltage protection, and the inrush current will also cause the train's overcurrent protection.

[0003] CN110091754A discloses a hybrid ground automatic phase-shifting device and control method, which proposes replacing all phase-changing switches with electronic switches such as thyristors. However, it does not provide any ideas on how to suppress overvoltage and inrush current problems with electronic switches. In addition, this method only obtains the closing angle through phase detection, and the accuracy is not high. Summary of the invention

[0004] In order to solve the problems of excitation surge current and low closing angle accuracy when using electronic switches when the existing train is over-phase, the present invention provides a train over-phase excitation surge current suppression method, device and train over-phase system.

[0005] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0006] In a first aspect, the present invention provides a method for suppressing excessive phase excitation inrush current of a train, the method comprising:

[0007] receiving an entry signal generated when a train is about to enter a phase separation zone, and controlling the conduction of the entry-side power supply arm and the neutral section according to the entry signal;

[0008] Integrating the voltage of the neutral section to obtain a first voltage integral value, and integrating the voltage of the exit-side power supply arm to obtain a second voltage integral value;

[0009] receiving a commutation signal generated when the train completely enters the phase separation area, and controlling the disconnection of the power supply arm and the neutral section on the entry side according to the commutation signal;

[0010] The first voltage integral value and the second voltage integral value are compared to obtain a difference. When the difference is less than a predetermined threshold, the exit-side power supply arm and the neutral section are controlled to be turned on to complete the commutation.

[0011] According to a specific embodiment, in the above-mentioned inhibition method, the method further comprises:

[0012] Responding to the entry signal, periodically clearing the first voltage integral value and the second voltage integral value;

[0013] The first voltage integrated value and the second voltage integrated value are stopped from being cleared in response to the commutation signal.

[0014] According to a specific implementation, in the above suppression method, the periodic clearing includes:

[0015] Performing PLL phase locking based on the voltage of the power supply arm on the entry side to obtain a first voltage phase, and performing PLL phase locking based on the voltage of the power supply arm on the exit side to obtain a second voltage phase;

[0016] When the first voltage phase is a cosine-defined zero value, clearing the first voltage integral value;

[0017] When the second voltage phase is a cosine-defined zero value, the second voltage integral value is cleared.

[0018] According to a specific embodiment, in the above-mentioned inhibition method, the method further comprises:

[0019] A comparison is performed within a first cycle between the first voltage integrated value and the second voltage integrated value to obtain a difference.

[0020] In a second aspect, the present invention provides a train over-phase excitation inrush current suppression device, the device comprising:

[0021] A receiving unit, used for receiving an entry signal generated when a train is about to enter a phase separation area, and receiving a phase change signal generated when a train completely enters the phase separation area;

[0022] A first control unit, used for controlling the power supply arm and the neutral section on the driving side to be turned on according to the driving-in signal, and controlling the power supply arm and the neutral section on the driving side to be turned off according to the phase change signal;

[0023] a signal processing unit, configured to obtain a first voltage integral value by integrating the voltage of the neutral section, obtain a second voltage integral value by integrating the voltage of the exit-side power supply arm, compare the first voltage integral value with the second voltage integral value to obtain a difference, and transmit a control signal to a second control unit when the difference is less than a predetermined threshold;

[0024] The second control unit is used to control the conduction of the exit-side power supply arm and the neutral section according to the control signal.

[0025] According to a specific implementation, in the above device, the signal processing unit is further used for:

[0026] Responding to the entry signal, periodically clearing the first voltage integral value and the second voltage integral value;

[0027] The first voltage integrated value and the second voltage integrated value are stopped from being cleared in response to the commutation signal.

[0028] According to a specific implementation, in the above device, the periodic clearing includes:

[0029] Performing PLL phase locking based on the voltage of the power supply arm on the entry side to obtain a first voltage phase, and performing PLL phase locking based on the voltage of the power supply arm on the exit side to obtain a second voltage phase;

[0030] When the first voltage phase is a cosine-defined zero value, clearing the first voltage integral value;

[0031] When the second voltage phase is a cosine-defined zero value, the second voltage integral value is cleared.

[0032] According to a specific implementation, in the above device, the signal processing unit is further used to compare the first voltage integrated value and the second voltage integrated value within a first cycle to obtain a difference.

[0033] In a third aspect, the present invention provides a train over-phase system, the system comprising a train position detection device, a voltage detection device, a first thyristor device, a second thyristor device and a control device connected in communication;

[0034] The train position detection device is used to detect that the train is about to enter the phase separation area and generate an entry signal, and to detect that the train has completely entered the phase separation area and generate a phase change signal;

[0035] The voltage detection device is used to detect the voltage of the power supply arm on the driving side, the voltage of the power supply arm on the driving side and the voltage of the neutral section;

[0036] The first thyristor device is used to connect the approaching side power supply arm and the neutral section;

[0037] The second thyristor device is used to connect the exit-side power supply arm and the neutral section;

[0038] The control device is used to receive signals output by the train position detection device and the voltage detection device, and execute a train over-phase excitation surge current suppression method as described in any of the above items, control the on and off of the first thyristor device and the second thyristor device, and complete phase change.

[0039] Compared with the prior art, the present invention has the following beneficial effects:

[0040] The present invention calculates the voltage integral value of the neutral section and the voltage integral value of the power supply arm on the exit side, and when the train enters the phase-splitting area, performs closing action by judging the difference between the two voltage integral values. The completed phase change can not only obtain the optimal closing angle of the thyristor, significantly improving the accuracy of the closing angle, but also can minimize the overvoltage and overcurrent impact on the train. It is more practical, easy to implement and easy to promote. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 A schematic diagram of the structure of a train phase separation system provided in an embodiment of the present application;

[0042] Figure 2 A flow chart of a method for suppressing excessive phase excitation inrush current of a train provided in an embodiment of the present application;

[0043] Figure 3 A schematic diagram of the voltage cosine trigonometric function provided in an embodiment of the present application. DETAILED DESCRIPTION

[0044] The present application is further described in detail below in conjunction with test examples and specific implementation methods. However, this should not be understood as the scope of the above subject matter of the present invention being limited to the following embodiments, and all technologies implemented based on the content of this application belong to the scope of the present invention.

[0045] The terms "first", "second", etc. in the specification embodiments, claims, and drawings of the present application are only used for the purpose of distinguishing descriptions, and cannot be understood as indicating or implying relative importance, nor can they be understood as indicating or implying order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, including a series of steps or units. The method, system, product, or device is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products, or devices.

[0046] Please refer to Figure 1 , which shows a schematic diagram of the structure of a train phase-splitting system provided by the present application. The system includes a train position detection device, a voltage detection device, a first thyristor device, a second thyristor device and a control device connected in communication.

[0047] In order to make the present application embodiment clear, in the following description, the train is Figure 1 The line shown runs from left to right into the over-phase region, that is, Figure 1 The left side of the route shown is the incoming side, and the right side is the outgoing side.

[0048] The train position detection device is arranged in the track area, and is used for detecting that the train is about to enter the phase separation area and generating an entry signal, and detecting that the train has completely entered the phase separation area and generating a phase change signal.

[0049] Wherein, the train position detection device includes four ground positioning devices, a first ground positioning device PS1, a second ground positioning device PS2, a third ground positioning device PS3, and a fourth ground positioning device PS4. It should be noted that the train on the track travels in both directions, so the four ground positioning devices are arranged at four preset positions symmetrically on the entry side and the exit side. When the train enters the phase-splitting area from left to right, the first ground positioning device PS1 is used to detect that the train is about to enter the phase-splitting area and generate an entry signal, and the third ground positioning device PS3 is used to detect that the train has completely entered the phase-splitting area and generates a phase-changing signal. At this time, the second ground positioning device PS2 and the fourth ground positioning device PS4 are used as backup. When PS1 is in effect, PS2 is ineffective; when PS3 is in effect, PS4 is ineffective.

[0050] Correspondingly, when the train enters the phase separation area from right to left, the fourth ground positioning device PS4 is used to detect that the train is about to enter the phase separation area and generate an entry signal, and the second ground positioning device PS2 is used to detect that the train has completely entered the phase separation area and generate a phase change signal. At this time, the third ground positioning device PS3 and the first ground positioning device PS1 are used as backup. When PS4 is in effect, PS3 is ineffective; when PS2 is in effect, PS1 is ineffective.

[0051] Preferably, the above-mentioned ground positioning device adopts an XT-2D ground magnetic induction device, and its installation position is specifically to measure 35m to the left and right sides from the two ends of the neutral segment vertically projected onto the rail, and then measure 170m outward from the point 35m to determine another point, that is, the other point is 205m away from the neutral segment. That is, the first ground positioning device PS1 and the fourth ground positioning device PS4 are 205 meters away from the two ends of the neutral segment vertically projected onto the rail, and the second ground positioning device and the third ground positioning device are 35 meters away from the two ends of the neutral segment vertically projected onto the rail.

[0052] The approaching power supply arm is connected to the neutral section through the first thyristor device, and the outgoing power supply arm is connected to the neutral section through the second thyristor device. It should be noted that, in order to ensure the safety and integrity of the train running line, a circuit breaker K1 is provided between the approaching power supply arm and the first thyristor device, a circuit breaker K2 is provided between the outgoing power supply arm and the second thyristor device, and the neutral section is grounded through a protective resistor R1.

[0053] The voltage detection device adopts a voltage transformer, and the first voltage transformer PT1 is connected in parallel to the connection line between the circuit breaker K1 and the first thyristor device, and is used to detect the voltage of the power supply arm on the driving side. The second voltage transformer PT2 is connected in parallel to the connection line between the circuit breaker K2 and the second thyristor device, and is used to detect the voltage of the power supply arm on the driving side. The third voltage transformer PT3 is connected in parallel to the connection line between the first thyristor device and the second thyristor device, and is used to detect the voltage of the neutral section.

[0054] Furthermore, the phase separation system provided in the embodiment of the present application also includes a current detection device, and the current detection device adopts a current transformer. The first current transformer CT1 is connected in series to the connection line between the circuit breaker K1 and the first thyristor device, and is used to detect the current of the incoming power supply arm. The second current transformer CT2 is connected in series to the connection line between the circuit breaker K2 and the second thyristor device, and is used to detect the current of the outgoing power supply arm. The third current transformer CT3 is connected in series to the connection line between the first thyristor device and the second thyristor device, and is used to detect the current of the neutral section.

[0055] The control device receives the signals collected by the above-mentioned devices respectively, and executes the train over-phase excitation inrush current suppression method to control the transformer excitation inrush current during phase switching. The suppression method is further introduced below in conjunction with specific implementation methods.

[0056] Please refer to Figure 2 , which shows a flow chart of a method for suppressing excessive phase excitation inrush current of a train provided in an embodiment of the present application. The control device adopts this method to perform phase switching control to achieve excitation inrush current suppression.

[0057] Specifically, the method comprises:

[0058] S1, receiving an entry signal generated when a train is about to enter a phase separation area, and controlling the conduction of the entry-side power supply arm and the neutral section according to the entry signal.

[0059] by Figure 1 Take the line shown as an example of entering from left to right. The first ground positioning device PS1 detects that the train is about to enter the phase separation area and sends an entry signal to the control device. At the same time, the control device controls the first thyristor device to turn on according to the entry signal, and at this time, the neutral section voltage is equal to the voltage of the entry side power supply arm.

[0060] S2. Integrate the voltage of the neutral section to obtain a first voltage integral value, and integrate the voltage of the exit-side power supply arm to obtain a second voltage integral value.

[0061] Specifically, the control device obtains the voltage Ua of the incoming-side power supply arm, the voltage Ub of the outgoing-side power supply arm, and the voltage Un of the neutral section by receiving the voltage signal collected by the voltage collection device.

[0062] The voltage of the neutral section is integrated to obtain a first voltage integral value, and the voltage of the exit-side power supply arm is integrated to obtain a second voltage integral value.

[0063] The calculation formula of the first voltage integral value is:

[0064] Φ n =∫U n dt,

[0065] Φ n is the first voltage integral value.

[0066] The calculation formula of the second voltage integral value is:

[0067] Φ b =∫U b dt,

[0068] Φ b is the second voltage integral value.

[0069] S3, receiving a commutation signal generated when the train completely enters the phase separation area, and controlling the power supply arm and the neutral section on the entering side to be disconnected according to the commutation signal.

[0070] When the train enters the phase separation area, the third ground positioning device PS3 starts to detect whether the train has completely entered the phase separation area, and sends a phase change signal to the control device. The control device receives the phase change signal generated when the train completely enters the phase separation area, controls the power supply arm and the neutral section on the entry side to be disconnected according to the phase change signal, and compares the first voltage integral value and the second voltage integral value to obtain the difference; when the difference is less than the predetermined threshold, controls the power supply arm and the neutral section on the exit side to be turned on.

[0071] S4. Compare the first voltage integral value Φ n and the second voltage integral value Φ b The difference is obtained. When the difference is less than a predetermined threshold, the power supply arm and the neutral section on the outgoing side are controlled to be turned on. At this time, the voltage of the neutral section is equal to the voltage of the power supply arm on the outgoing side, completing the phase change from the power supply on the incoming side to the power supply arm on the outgoing side.

[0072] It should be noted that when the train is about to enter the phase-splitting area, the transformer is powered off, and the voltage at the moment of power-off corresponds to a magnetic flux, i.e., residual magnetism. The residual magnetism will not disappear with the disappearance of the voltage, but will exist for a long time. When the train enters the phase-splitting area completely, the transformer will be powered on again. At this time, a bias magnetism will be generated according to the voltage when it is powered on. When the residual magnetism, the bias magnetism, and the steady-state magnetic flux corresponding to the transformer voltage add up to more than the saturation magnetic flux of the transformer, an excitation surge current will be generated. In order to suppress the excitation surge current, the bias magnetism and the residual magnetism can be offset, and no excitation surge current will be generated. The embodiment of the present application considers the residual pressure of the neutral section (the residual pressure may be zero, which is equivalent to the transformer being powered off), and calculates the magnetic flux corresponding to the transformer voltage in real time, i.e., the above-mentioned first voltage integral value. When switching the power supply, ensure that the change in magnetic flux is as small as possible, and no excitation surge current will be generated. That is, the absolute value of the difference between the first integral value and the second integral value in the above step is less than the predetermined threshold. It eliminates the change in closing angle caused by residual pressure in the neutral section and suppresses the train-mounted transformer excitation inrush current to the greatest extent.

[0073] In a possible implementation, the predetermined threshold may be zero, in which case the first voltage integral value and the second voltage integral value are equal. The predetermined threshold may also be set accordingly according to actual train operation conditions and power supply line conditions.

[0074] It can be understood that after the train leaves the phase-splitting area, the control device controls the incoming side power supply arm, the outgoing side power supply arm and the neutral section to return to the working condition before the phase-splitting, that is, the outgoing side power supply arm is disconnected from the neutral section, and the above steps are executed again when waiting for the next train to pass through the phase-splitting area.

[0075] Based on the method for suppressing the excitation inrush current provided by the embodiment of the present application, by calculating the voltage integral value of the neutral section and the voltage integral value of the power supply arm on the exit side, and when the train completely enters the phase separation area, the absolute value of the difference between the two voltage integral values ​​is judged to perform the closing action, and the completed phase change can not only obtain the best closing angle of the thyristor, significantly improve the accuracy of the closing angle, but also minimize the overvoltage and overcurrent impact on the train, which is more practical, easy to implement, and easy to promote. More practical, easy to implement, and easy to promote.

[0076] In a possible implementation, in order to eliminate the error occurring in the calculation process of the voltage integral value, the embodiment of the present application can also eliminate the integral value by clearing it to zero, thereby reducing the accumulated error.

[0077] Specifically, the above method also includes:

[0078] Responding to the entry signal, periodically clearing the first voltage integral value and the second voltage integral value;

[0079] The first voltage integrated value and the second voltage integrated value are stopped from being cleared in response to the commutation signal.

[0080] The periodic clearing includes:

[0081] Performing PLL phase locking based on the voltage of the power supply arm on the entry side to obtain a first voltage phase, and performing PLL phase locking based on the voltage of the power supply arm on the exit side to obtain a second voltage phase;

[0082] When the first voltage phase is a cosine-defined zero value, clearing the first voltage integral value;

[0083] When the second voltage phase is a cosine-defined zero value, the second voltage integral value is cleared.

[0084] In the embodiment of the present application, the first voltage phase is obtained by performing PLL phase-locking on the voltage of the power supply arm on the driving-in side. The second voltage phase is obtained by performing PLL phase-locking on the voltage of the power supply arm on the driving-in side, and the voltage phase is obtained by the waveform of the input voltage. It should be noted that in the embodiment of the present application, the first voltage phase and the second voltage phase are defined by cosine, that is, when the voltage waveform is at the positive peak, the voltage phase is zero. At this time, the variation range of the first voltage phase and the second voltage phase is a ramp periodic function of 0 to 2π, such as Figure 3 As shown, it corresponds to the voltage cosine trigonometric function.

[0085] It can be understood that since the two voltage integral values ​​are periodic functions, the two voltage integral values ​​are reset according to the voltage phase in order to eliminate their cumulative errors. The reset is repeated periodically until the train completely enters the phase separation area, and the reset is stopped.

[0086] Due to Φ n and Φ b The integral values ​​of the two voltages are periodic functions. The difference between the two functions is related to the voltage phase difference between the two power supply arms, the thyristor turn-off time, the residual voltage, etc. The comparison time is within one cycle (20ms).

[0087] It can be understood that the commutation time from the entry-side power supply arm to the exit-side power supply arm is started from the thyristor of the entry-side power supply arm. When the calculated neutral section voltage integral value is equal to the exit-side voltage integral value, the thyristor of the exit-side power supply arm is turned on. Since the neutral section voltage integral value and the exit-side power supply arm voltage integral value are both sinusoidal functions (considering that the residual voltage also changes periodically), the two sinusoidal functions are subtracted, using the trigonometric sum-difference product formula, or the trigonometric functions of the same frequency, there must be a zero point (when the predetermined threshold is set to zero). In other words, when two trigonometric functions of the same frequency are subtracted (comparison time), there must be a zero point in one cycle, and this moment is the commutation time.

[0088] Based on the phase change in the first cycle, the error calculated based on the voltage integral value is minimized. In order to better complete the phase change, when the embodiment of the present application is implemented, the phase change needs to be performed in the first cycle after the comparison moment.

[0089] It should be noted that when the train Figure 1 When the train enters from the right side of the line shown and exits from the left side, in the above embodiment, the corresponding entering side is converted to the exiting side, and the exiting side is converted to the entering side. For example, at this time, the fourth ground positioning device PS4 detects that the train is about to enter the phase separation area and generates an entering signal, and the second ground positioning device PS2 detects that the train has completely entered the phase separation area and generates a phase change signal.

[0090] The first voltage transformer PT1 and the first current transformer CT1 are used to detect the voltage and current of the power supply arm on the outgoing side, and the second voltage transformer PT2 and the second current transformer CT2 are used to detect the voltage and current of the power supply arm on the incoming side.

[0091] Correspondingly, the control device controls the second thyristor device according to the train entry signal, and controls the first thyristor device according to the train exit signal. At the same time, the process corresponding to the corresponding signal in the above method is executed, which will not be repeated here.

[0092] On the other hand, an embodiment of the present application further provides a train over-phase excitation inrush current suppression device, the device comprising:

[0093] A receiving unit, used for receiving an entry signal generated when a train is about to enter a phase separation area, and receiving a phase change signal generated when a train completely enters the phase separation area;

[0094] A first control unit, used for controlling the power supply arm and the neutral section on the driving side to be turned on according to the driving-in signal, and controlling the power supply arm and the neutral section on the driving side to be turned off according to the phase change signal;

[0095] a signal processing unit, configured to obtain a first voltage integral value by integrating the voltage of the neutral section, obtain a second voltage integral value by integrating the voltage of the exit-side power supply arm, compare the first voltage integral value with the second voltage integral value to obtain a difference, and transmit a control signal to a second control unit when the difference is less than a predetermined threshold;

[0096] The second control unit is used to control the conduction of the exit-side power supply arm and the neutral section according to the control signal.

[0097] In a possible implementation manner, in the above device, the signal processing unit is further used for:

[0098] Responding to the entry signal, periodically clearing the first voltage integral value and the second voltage integral value;

[0099] The first voltage integrated value and the second voltage integrated value are stopped from being cleared in response to the commutation signal.

[0100] The periodic clearing includes:

[0101] Performing PLL phase locking based on the voltage of the power supply arm on the entry side to obtain a first voltage phase, and performing PLL phase locking based on the voltage of the power supply arm on the exit side to obtain a second voltage phase;

[0102] When the first voltage phase is a cosine-defined zero value, clearing the first voltage integral value;

[0103] When the second voltage phase is a cosine-defined zero value, the second voltage integral value is cleared.

[0104] Furthermore, the signal processing unit is further configured to compare the first voltage integral value and the second voltage integral value within a first cycle to obtain a difference.

[0105] In a possible implementation, in the embodiment of the present application, the control device may include a memory and a processor; wherein,

[0106] The memory is used to store computer programs;

[0107] The processor is used to call and execute the computer program so that the device performs a method for suppressing excessive phase excitation inrush current of a train as described in any one of the above items.

[0108] It should be understood that the processor in the embodiment of the present application can be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method embodiment can be completed by the hardware integrated logic circuit or software instructions in the processor. The above processor can be a general processor, a digital signal processor (digital signal processor, DSP), an application specific integrated circuit (application specific integrated circuit, ASIC), a field programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general processor can be a microprocessor or the processor can also be any conventional processor, etc. The steps of the method disclosed in the embodiment of the present application can be directly embodied as a hardware decoding processor to perform, or the hardware and software modules in the decoding processor are combined to perform. The software module can be located in a mature storage medium in the field such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

[0109] In addition, it will be appreciated by those skilled in the art that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of complete hardware embodiments, complete software embodiments, or embodiments in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0110] The embodiments of the present application are described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0111] These computer program instructions may also be stored in a computer readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0112] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0113] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present application.

Claims

1. A method for suppressing excessive phase excitation inrush current of a train, characterized in that: The method comprises: receiving an entry signal generated when a train is about to enter a phase separation zone, and controlling the conduction of the entry-side power supply arm and the neutral section according to the entry signal; Integrating the voltage of the neutral section to obtain a first voltage integral value, and integrating the voltage of the exit-side power supply arm to obtain a second voltage integral value; receiving a commutation signal generated when the train completely enters the phase separation area, and controlling the disconnection of the power supply arm and the neutral section on the entry side according to the commutation signal; The first voltage integral value and the second voltage integral value are compared to obtain a difference. When the difference is less than a predetermined threshold, the exit-side power supply arm and the neutral section are controlled to be turned on to complete the commutation.

2. A method for suppressing train over-phase excitation inrush current according to claim 1, characterized in that: The method further includes: periodically clearing the first voltage integral value and the second voltage integral value in response to the driving-in signal; The first voltage integrated value and the second voltage integrated value are stopped from being cleared in response to the commutation signal.

3. A method for suppressing train over-phase excitation inrush current according to claim 2, characterized in that: The periodic clearing includes: Performing PLL phase locking based on the voltage of the power supply arm on the entry side to obtain a first voltage phase, and performing PLL phase locking based on the voltage of the power supply arm on the exit side to obtain a second voltage phase; When the first voltage phase is a cosine-defined zero value, clearing the first voltage integral value; When the second voltage phase is a cosine-defined zero value, the second voltage integral value is cleared.

4. A method for suppressing train over-phase excitation inrush current according to claim 1, characterized in that: The method further includes: performing a comparison between the first voltage integrated value and the second voltage integrated value within a first cycle to obtain a difference.

5. A train over-phase excitation inrush current suppression device, characterized in that: The device comprises: A receiving unit, used for receiving an entry signal generated when a train is about to enter a phase separation area, and receiving a phase change signal generated when a train completely enters the phase separation area; A first control unit, used for controlling the power supply arm and the neutral section on the driving side to be turned on according to the driving-in signal, and controlling the power supply arm and the neutral section on the driving side to be turned off according to the phase change signal; a signal processing unit, configured to obtain a first voltage integral value by integrating the voltage of the neutral section, obtain a second voltage integral value by integrating the voltage of the exit-side power supply arm, compare the first voltage integral value with the second voltage integral value to obtain a difference, and transmit a control signal to a second control unit when the difference is less than a predetermined threshold; The second control unit is used to control the conduction of the exit-side power supply arm and the neutral section according to the control signal.

6. A train over-phase excitation inrush current suppression device according to claim 5, characterized in that: The signal processing unit is also used for: Responding to the entry signal, periodically clearing the first voltage integral value and the second voltage integral value; The first voltage integrated value and the second voltage integrated value are stopped from being cleared in response to the commutation signal.

7. A train over-phase excitation inrush current suppression device according to claim 6, characterized in that: The periodic clearing includes: Performing PLL phase locking based on the voltage of the power supply arm on the entry side to obtain a first voltage phase, and performing PLL phase locking based on the voltage of the power supply arm on the exit side to obtain a second voltage phase; When the first voltage phase is a cosine-defined zero value, clearing the first voltage integral value; When the second voltage phase is a cosine-defined zero value, the second voltage integral value is cleared.

8. The train over-phase excitation inrush current suppression device according to claim 5, characterized in that: The signal processing unit is further configured to compare the first voltage integrated value and the second voltage integrated value within a first cycle to obtain a difference.

9. A train phase separation system, characterized in that: The system comprises a train position detection device, a voltage detection device, a first thyristor device, a second thyristor device and a control device connected in communication; The train position detection device is used to detect that the train is about to enter the phase separation area and generate an entry signal, and to detect that the train has completely entered the phase separation area and generate a phase change signal; The voltage detection device is used to detect the voltage of the power supply arm on the driving side, the voltage of the power supply arm on the driving side and the voltage of the neutral section; The first thyristor device is used to connect the approaching side power supply arm and the neutral section; The second thyristor device is used to connect the exit-side power supply arm and the neutral section; The control device is used to receive signals output by the train position detection device and the voltage detection device, and execute the method according to any one of claims 1 to 4 to control the on and off of the first thyristor device and the second thyristor device to complete phase switching.

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