Voltage stabilization control method and system for in-phase power supply traction network of electrified railway

Abstract

The invention relates to the technical field of traction substation power supply, and relates to an electrified railway in-phase power supply traction network voltage stabilization control method and system.The method comprises the steps that first information, second information and third information are obtained, the first information comprises voltage information of a traction substation, and the second information comprises current information of the traction substation; the third information comprises voltage information of the partition post; the first information and the third information are sent to a calculation unit, a reactive current instruction is obtained, and the calculation unit is used for outputting the reactive current instruction to the traction network by the in-phase power supply device; sending the reactive current instruction and the second information to a current control unit to obtain a voltage stabilizing signal; according to the invention, the calculation unit realizes adjustment of reactive power output by the in-phase power supply device, and reactive voltage regulation is realized by outputting a reactive current instruction to the traction network through closed-loop control by taking the voltage of the traction network of the subarea post as a controlled variable.

Description

Technical Field

[0001] The present invention relates to the technical field of traction substation power supply, and in particular to a voltage stabilization control method and system for a co-phase power supply traction network of an electrified railway. Background Art

[0002] The same-phase power supply technology is a traction power supply method that uses the same phase of the overhead contact network voltage to supply power between adjacent power supply units. Its typical implementation method is to achieve voltage conversion through an AC-DC-AC converter in the traction substation to form a single voltage source to supply power to the train traction load. The currently used electric traction same-phase power supply technology mainly adopts the principle of balanced traction transformer. While achieving same-phase power supply to the overhead contact network, it also achieves negative sequence suppression. This method can only reduce the negative sequence on the grid side, and cannot achieve active voltage stabilization control of the traction network voltage. Summary of the invention

[0003] The object of the present invention is to provide a method and system for voltage stabilization control of a co-phase power supply traction network of an electrified railway, so as to improve the above-mentioned problems.

[0004] In order to achieve the above objectives, the present application provides the following technical solutions:

[0005] On the one hand, an embodiment of the present application provides a method for voltage stabilization control of a co-phase power supply traction network of an electrified railway, the method comprising:

[0006] Acquire first information, second information and third information, wherein the first information includes voltage information of a traction substation, the second information includes current information of a traction substation, and the third information includes voltage information of a substation;

[0007] Sending the first information and the third information to a calculation unit to obtain a reactive current instruction, wherein the calculation unit is used to calculate the reactive current instruction output by the same-phase power supply device to the traction network;

[0008] Sending the reactive current command and the second information to a current control unit to obtain a voltage stabilization signal, wherein the current control unit is used to synthesize the reactive current command and the second information;

[0009] The traction network is subjected to voltage stabilization control according to the voltage stabilization signal.

[0010] In a second aspect, an embodiment of the present application provides a voltage stabilization control system for a co-phase power supply traction network of an electrified railway, the system comprising:

[0011] An acquisition module, used to acquire first information, second information and third information, wherein the first information includes voltage information of a traction substation, the second information includes current information of a traction substation, and the third information includes voltage information of a substation;

[0012] A first processing module, used for sending the first information and the third information to a calculation unit to obtain a reactive current instruction, wherein the calculation unit is used for calculating the reactive current instruction output by the same-phase power supply device to the traction network;

[0013] A second processing module, used for sending the reactive current command and the second information to a current control unit to obtain a voltage stabilization signal, wherein the current control unit is used for synthesizing the reactive current command and the second information;

[0014] The voltage stabilization module is used to perform voltage stabilization control on the traction network according to the voltage stabilization signal.

[0015] In a third aspect, an embodiment of the present application provides a voltage stabilization control device for a co-phase power supply traction network of an electrified railway, the device comprising a memory and a processor. The memory is used to store a computer program; the processor is used to implement the steps of the above-mentioned method for voltage stabilization control of a co-phase power supply traction network of an electrified railway when executing the computer program.

[0016] In a fourth aspect, an embodiment of the present application provides a readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the steps of the above-mentioned method for voltage stabilization control of the same-phase power supply traction network of an electrified railway are implemented.

[0017] The beneficial effects of the present invention are:

[0018] The present invention processes the first information and the third information through a calculation unit to obtain a reactive current instruction, adjusts the reactive power output by the same-phase power supply device in real time according to the voltage information of the sub-station, and then outputs a voltage stabilization signal with a current control unit to achieve reactive voltage regulation, thus making up for the current deficiency of failing to achieve voltage stabilization control of the traction network based on the same-phase power supply device.

[0019] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or be understood by implementing the embodiments of the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description, claims, and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0021] Figure 1The present invention is a flowchart of a method for controlling voltage stabilization of a co-phase power supply traction network of an electrified railway described in an embodiment of the present invention.

[0022] Figure 2 It is a schematic structural diagram of a voltage stabilizing control system for a co-phase power supply traction network of an electrified railway described in an embodiment of the present invention.

[0023] Figure 3 It is a schematic structural diagram of the voltage stabilizing control equipment for the same-phase power supply traction network of the electrified railway described in an embodiment of the present invention.

[0024] Labels in the figure: 901, acquisition module; 902, first processing module; 903, second processing module; 904, voltage stabilization module; 9021, first processing unit; 9022, first calculation unit; 9023, second calculation unit; 9031, acquisition unit; 9032, fifth calculation unit; 9033, fourth processing unit; 9041, fifth processing unit; 9042, eighth calculation unit; 9043, sixth processing unit; 90231, second processing unit; 90232, third processing unit; 90233, third calculation unit; 90234, fourth calculation unit; 90321, sixth calculation unit; 90322, seventh calculation unit; 800, voltage stabilization control equipment for co-phase power supply traction network of electrified railway; 801, processor; 802, memory; 803, multimedia component; 804, I / O interface; 805, communication component. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0026] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. At the same time, in the description of the present invention, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0027] Embodiment 1:

[0028] This embodiment provides a method for voltage stabilization control of a co-phase power supply traction network of an electrified railway. It can be understood that a scenario can be laid out in this embodiment, for example: a scenario of voltage stabilization of a traction substation that uses co-phase power supply technology as a power supply method.

[0029] See also Figure 1 , the figure shows that the method includes step S1, step S2, step S3 and step S4, which specifically include:

[0030] Step S1, obtaining first information, second information and third information, wherein the first information includes voltage information of a traction substation, the second information includes current information of a traction substation, and the third information includes voltage information of a substation;

[0031] In this step, the voltage information at the head end of the traction substation is collected through the voltage transformer installed in the traction substation to obtain the first information, and the current information output by the same-phase power supply device installed in the traction substation, that is, the second information, is collected through the current transformer, and the terminal voltage of the substation is collected through the voltage transformer installed in the substation.

[0032] Step S2, sending the first information and the third information to a calculation unit to obtain a reactive current instruction, wherein the calculation unit is used to calculate the reactive current instruction output by the same-phase power supply device to the traction network;

[0033] In this step, the calculation unit adjusts the reactive power output by the same-phase power supply device, and outputs reactive current to the traction network through closed-loop control with the traction network voltage of the sub-area as the controlled quantity to achieve reactive voltage regulation.

[0034] The step S2 also includes step S21, step S22 and step S23, which specifically include:

[0035] Step S21, converting the first information into a corresponding trigonometric function signal;

[0036] In this step, the first information is input into a phase-locked loop to obtain a unit trigonometric function signal perpendicular to the voltage at the head end of the traction network.

[0037] Step S22, calculating the third information and a preset reference voltage to obtain a first calculation result;

[0038] In this step, a preset reference voltage and a terminal voltage of the partition are added to obtain a first calculation result.

[0039] Step S23: Calculate according to the first calculation result and the trigonometric function signal to obtain a reactive current instruction.

[0040] The step S23 also includes step S231, step S232, step S233 and step S234, which specifically include:

[0041] Step S231, sending the first calculation result to a proportional-integral controller to obtain a second calculation result;

[0042] In this step, the proportional-integral controller can further compensate for the voltage drop, especially in steady state, it can achieve zero-static-error tracking control of the terminal voltage of the traction network and the set value, thereby realizing the active voltage stabilization control function of the traction network voltage.

[0043] Step S232, sending the first calculation result to the gain device to obtain a third calculation result;

[0044] In this step, the amplifier can compensate for the traction network voltage loss caused by the incoming power supply reactance and the traction transformer equivalent.

[0045] Step S233, adding the second calculation result to the third calculation result to obtain a fourth calculation result;

[0046] Step S234: perform calculation according to the fourth calculation result and the trigonometric function signal to obtain a reactive current instruction.

[0047] In this embodiment, the proportional-integral controller and the gain device dynamically adjust the output reactive power of the same-phase power supply device to fully or partially compensate for the traction network voltage drop caused by the equivalent reactance of the incoming power supply and the traction transformer. In addition, the present invention realizes traction network voltage stabilization based on closed-loop control of the terminal voltage and voltage difference feedforward, wherein the voltage difference feedforward is realized by a gain device with a fast response speed.

[0048] Step S3, sending the reactive current command and the second information to a current control unit to obtain a voltage stabilization signal, wherein the current control unit is used to synthesize the reactive current command and the second information;

[0049] The step S3 also includes step S31, step S32 and step S33, which specifically include:

[0050] Step S31, obtaining a preset reference current;

[0051] Step S32, performing calculation according to the preset reference current, the reactive current command and the second information to obtain a fifth calculation result;

[0052] The step S32 also includes step S321 and step S322, which specifically include:

[0053] Step S321, adding the preset reference current and the reactive current instruction to obtain a sixth calculation result;

[0054] In this step, a preset reference current is used as an active current command, which is added to a reactive current command to obtain a total current command.

[0055] Step S322: subtract the sixth calculation result from the second information to obtain a fifth calculation result.

[0056] Step S33: sending the fifth calculation result to the quasi-proportional resonant controller to obtain a voltage stabilization signal.

[0057] In this step, the fifth calculation result needs to be processed by S transformation before being sent to the quasi-proportional resonant controller. It should be noted that the s-domain transfer function of the quasi-proportional resonant controller is specifically:

[0058]

[0059] In the above formula, K pi is the proportionality coefficient, ω 0 is the resonant frequency, ω c is the bandwidth, K r is the resonance coefficient, and s is the result of S-transforming the fifth calculation result.

[0060] In this embodiment, because the quasi-proportional resonant controller has a large gain at the resonant frequency, it can achieve zero-static tracking of the AC signal, thereby achieving excellent current tracking control.

[0061] Step S4, performing voltage stabilization control on the traction network according to the voltage stabilization signal.

[0062] The step S4 also includes step S41, step S42 and step S43, which specifically include:

[0063] Step S41, sending the voltage stabilization signal to the same-phase power supply device to generate a compensation voltage parallel to the traction substation voltage;

[0064] In this step, since the traction network generally exhibits inductive characteristics and the resistance is significantly smaller than the reactance, the terminal voltage of the substation is generally smaller than and lags behind the voltage of the traction substation. Therefore, a voltage stabilization signal is injected into the traction network to generate a compensation voltage parallel to the head-end voltage in the equivalent impedance of the contact network or traction transformer. It should be noted that the voltage stabilization signal includes reactive current instructions.

[0065] Step S42, calculating the compensation voltage and the third information to obtain an adjusted voltage;

[0066] In this step, the compensation voltage is superimposed on the voltage of the partition to obtain the regulated voltage.

[0067] Step S43: performing voltage stabilization control on the traction network according to the adjusted voltage.

[0068] The present invention can realize voltage stabilization control of the traction network based on the same-phase power supply device, and is particularly suitable for low-voltage compensation of the terminal voltage. The present invention makes up for the current lack of voltage stabilization control of the traction network based on the same-phase power supply device.

[0069] Embodiment 2:

[0070] like Figure 2 As shown, this embodiment provides a voltage stabilization control system for a co-phase power supply traction network of an electrified railway, the system comprising an acquisition module 901, a first processing module 902, a second processing module 903 and a voltage stabilization module 904, which specifically include:

[0071] The acquisition module 901 is used to acquire first information, second information and third information, wherein the first information includes voltage information of the traction substation, the second information includes current information of the traction substation, and the third information includes voltage information of the substation;

[0072] A first processing module 902, configured to send the first information and the third information to a calculation unit to obtain a reactive current instruction, wherein the calculation unit is configured to calculate a reactive current instruction output by a same-phase power supply device to a traction network;

[0073] A second processing module 903, used for sending the reactive current command and the second information to a current control unit to obtain a voltage stabilization signal, wherein the current control unit is used for synthesizing the reactive current command and the second information;

[0074] The voltage stabilization module 904 is used to perform voltage stabilization control on the traction network according to the voltage stabilization signal.

[0075] In a specific implementation of the present disclosure, the first processing module 902 further includes a first processing unit 9021, a first calculation unit 9022 and a second calculation unit 9023, which specifically include:

[0076] A first processing unit 9021, configured to convert the first information into a corresponding trigonometric function signal;

[0077] A first calculation unit 9022, configured to calculate the third information and a preset reference voltage to obtain a first calculation result;

[0078] The second calculation unit 9023 is used to perform calculation according to the first calculation result and the trigonometric function signal to obtain a reactive current instruction.

[0079] In a specific implementation of the present disclosure, the second computing unit 9023 further includes a second processing unit 90231, a third processing unit 90232, a third computing unit 90233 and a fourth computing unit 90234, which specifically include:

[0080] The second processing unit 90231 is used to send the first calculation result to a proportional-integral controller to obtain a second calculation result;

[0081] A third processing unit 90232 is used to send the first calculation result to the gain device to obtain a third calculation result;

[0082] A third calculation unit 90233 is used to add the second calculation result to the third calculation result to obtain a fourth calculation result;

[0083] The fourth calculation unit 90234 is used to perform calculation according to the fourth calculation result and the trigonometric function signal to obtain a reactive current instruction.

[0084] In a specific implementation of the present disclosure, the second processing module 903 further includes an acquisition unit 9031, a fifth calculation unit 9032 and a fourth processing unit 9033, which specifically include:

[0085] An acquisition unit 9031 is used to acquire a preset reference current;

[0086] a fifth calculation unit 9032, configured to perform calculation according to the preset reference current, the reactive current instruction and the second information to obtain a fifth calculation result;

[0087] The fourth processing unit 9033 is used to send the fifth calculation result to the quasi-proportional resonant controller to obtain a voltage stabilization signal.

[0088] In a specific implementation of the present disclosure, the fifth calculation unit 9032 also includes a sixth calculation unit 90321 and a seventh calculation unit 90322, which specifically include:

[0089] A sixth calculation unit 90321, configured to add the preset reference current to the reactive current instruction to obtain a sixth calculation result;

[0090] The seventh calculation unit 90322 is used to subtract the sixth calculation result from the second information to obtain a fifth calculation result.

[0091] In a specific implementation of the present disclosure, the voltage stabilization module 904 further includes a fifth processing unit 9041, an eighth calculation unit 9042 and a sixth processing unit 9043, which specifically include:

[0092] The fifth processing unit 9041 is used to send the voltage stabilization signal to the same-phase power supply device to generate a compensation voltage parallel to the traction substation voltage;

[0093] an eighth calculation unit 9042, configured to calculate the compensation voltage and the third information to obtain an adjusted voltage;

[0094] The sixth processing unit 9043 is used to perform voltage stabilization control on the traction network according to the adjusted voltage.

[0095] It should be noted that, regarding the system in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0096] Embodiment 3:

[0097] Corresponding to the above method embodiment, this embodiment also provides an electrified railway co-phase power supply traction network voltage stabilization control device. The electrified railway co-phase power supply traction network voltage stabilization control device described below and the electrified railway co-phase power supply traction network voltage stabilization control method described above can be referenced to each other.

[0098] Figure 3 FIG. 8 is a block diagram of a voltage stabilization control device 800 for a co-phase power supply traction network of an electrified railway according to an exemplary embodiment. Figure 3 As shown, the electrified railway co-phase power supply traction network voltage stabilization control device 800 may include: a processor 801, a memory 802. The electrified railway co-phase power supply traction network voltage stabilization control device 800 may also include one or more of a multimedia component 803, an I / O interface 804, and a communication component 805.

[0099] The processor 801 is used to control the overall operation of the electrified railway co-phase power supply traction network voltage stabilization control device 800 to complete all or part of the steps in the above-mentioned electrified railway co-phase power supply traction network voltage stabilization control method. The memory 802 is used to store various types of data to support the operation of the electrified railway co-phase power supply traction network voltage stabilization control device 800. These data may include, for example, instructions for any application or method operating on the electrified railway co-phase power supply traction network voltage stabilization control device 800, as well as application-related data, such as contact data, sent and received messages, pictures, audio, video, etc. The memory 802 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, disk or optical disk. The multimedia component 803 can include a screen and an audio component. The screen can be, for example, a touch screen, and the audio component is used to output and / or input audio signals. For example, the audio component can include a microphone, and the microphone is used to receive external audio signals. The received audio signal can be further stored in the memory 802 or sent through the communication component 805. The audio component also includes at least one speaker for outputting audio signals. The I / O interface 804 provides an interface between the processor 801 and other interface modules, and the above-mentioned other interface modules can be keyboards, mice, buttons, etc. These buttons can be virtual buttons or physical buttons. The communication component 805 is used for wired or wireless communication between the electrified railway co-phase power supply traction network voltage stabilization control device 800 and other devices. Wireless communication, such as Wi-Fi, Bluetooth, Near Field Communication (NFC), 2G, 3G or 4G, or a combination of one or more of them, so the corresponding communication component 805 can include: Wi-Fi module, Bluetooth module, NFC module.

[0100] In an exemplary embodiment, the electrified railway co-phase power supply traction network voltage stabilization control device 800 can be implemented by one or more application-specific integrated circuits (ASIC), digital signal processors (DSP), digital signal processing devices (DSPD), programmable logic devices (PLD), field programmable gate arrays (FPGA), controllers, microcontrollers, microprocessors or other electronic components to execute the above-mentioned electrified railway co-phase power supply traction network voltage stabilization control method.

[0101] In another exemplary embodiment, a computer-readable storage medium including program instructions is also provided, and when the program instructions are executed by a processor, the steps of the above-mentioned method for controlling the voltage stabilization of the same-phase power supply traction network of an electrified railway are implemented. For example, the computer-readable storage medium may be the above-mentioned memory 802 including program instructions, and the above-mentioned program instructions may be executed by the processor 801 of the device 800 for controlling the voltage stabilization of the same-phase power supply traction network of an electrified railway to complete the above-mentioned method for controlling the voltage stabilization of the same-phase power supply traction network of an electrified railway.

[0102] Embodiment 4:

[0103] Corresponding to the above method embodiment, a readable storage medium is also provided in this embodiment. The readable storage medium described below and the voltage stabilization control method of the same-phase power supply traction network of an electrified railway described above can be referred to each other.

[0104] A readable storage medium stores a computer program, which, when executed by a processor, implements the steps of the method for voltage stabilization control of a co-phase power supply traction network of an electrified railway in the above-mentioned method embodiment.

[0105] The readable storage medium may specifically be a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, or other readable storage medium that can store program codes.

[0106] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0107] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A method for voltage stabilization control of a co-phase power supply traction network of an electrified railway, characterized in that: include: Acquire first information, second information and third information, wherein the first information includes voltage information of a traction substation, the second information includes current information of a traction substation, and the third information includes voltage information of a substation; Sending the first information and the third information to a calculation unit to obtain a reactive current instruction, wherein the calculation unit is used to calculate the reactive current instruction output by the same-phase power supply device to the traction network; Sending the reactive current command and the second information to a current control unit to obtain a voltage stabilization signal, wherein the current control unit is used to synthesize the reactive current command and the second information; The traction network is subjected to voltage stabilization control according to the voltage stabilization signal.

2. The method for voltage stabilization control of the electrified railway co-phase power supply traction network according to claim 1, characterized in that: Sending the first information and the third information to a computing unit includes: Converting the first information into a corresponding trigonometric function signal; Calculating the third information and a preset reference voltage to obtain a first calculation result; Calculation is performed according to the first calculation result and the trigonometric function signal to obtain a reactive current instruction.

3. The method for voltage stabilization control of the electrified railway co-phase power supply traction network according to claim 2, characterized in that: Performing calculation according to the first calculation result and the trigonometric function signal includes: Sending the first calculation result to a proportional-integral controller to obtain a second calculation result; Sending the first calculation result to the gain device to obtain a third calculation result; Adding the second calculation result to the third calculation result to obtain a fourth calculation result; A calculation is performed according to the fourth calculation result and the trigonometric function signal to obtain a reactive current instruction.

4. The method for controlling voltage stabilization of the electrified railway co-phase power supply traction network according to claim 1, characterized in that: The method further comprises: sending the reactive current instruction and the second information to a current control unit, comprising: Obtaining a preset reference current; Performing calculation according to the preset reference current, the reactive current command and the second information to obtain a fifth calculation result; The fifth calculation result is sent to the quasi-proportional resonant controller to obtain a voltage stabilization signal.

5. The method for voltage stabilization control of the electrified railway co-phase power supply traction network according to claim 1, characterized in that: The traction network is controlled to maintain voltage according to the voltage stabilization signal, including: sending the voltage stabilization signal to a co-phase power supply device to generate a compensation voltage parallel to the traction substation voltage; Calculating the compensation voltage and the third information to obtain an adjusted voltage; The traction network is subjected to voltage stabilization control according to the regulated voltage.

6. An electrified railway co-phase power supply traction network voltage stabilization control system, characterized in that: include: An acquisition module, used to acquire first information, second information and third information, wherein the first information includes voltage information of a traction substation, the second information includes current information of a traction substation, and the third information includes voltage information of a substation; A first processing module, used for sending the first information and the third information to a calculation unit to obtain a reactive current instruction, wherein the calculation unit is used for calculating the reactive current instruction output by the same-phase power supply device to the traction network; A second processing module, used for sending the reactive current command and the second information to a current control unit to obtain a voltage stabilization signal, wherein the current control unit is used for synthesizing the reactive current command and the second information; The voltage stabilization module is used to perform voltage stabilization control on the traction network according to the voltage stabilization signal.

7. The voltage stabilization control system for the electrified railway co-phase power supply traction network according to claim 6, characterized in that: The first processing module comprises: A first processing unit, configured to convert the first information into a corresponding trigonometric function signal; A first calculation unit, used to calculate the third information and a preset reference voltage to obtain a first calculation result; The second calculation unit is used to perform calculation according to the first calculation result and the trigonometric function signal to obtain a reactive current instruction.

8. The voltage stabilization control system for the electrified railway co-phase power supply traction network according to claim 7, characterized in that: The second computing unit comprises: A second processing unit, used for sending the first calculation result to a proportional-integral controller to obtain a second calculation result; A third processing unit, configured to send the first calculation result to the gain device to obtain a third calculation result; a third calculation unit, configured to add the second calculation result to the third calculation result to obtain a fourth calculation result; The fourth calculation unit is used to perform calculation according to the fourth calculation result and the trigonometric function signal to obtain a reactive current instruction.

9. The voltage stabilization control system for the electrified railway co-phase power supply traction network according to claim 6, characterized in that: The second processing module comprises: An acquisition unit, used for acquiring a preset reference current; a fifth calculation unit, configured to perform calculation according to the preset reference current, the reactive current instruction and the second information to obtain a fifth calculation result; The fourth processing unit is used to send the fifth calculation result to the quasi-proportional resonant controller to obtain a voltage stabilization signal.

10. The voltage stabilization control system for the electrified railway co-phase power supply traction network according to claim 6, characterized in that: The voltage stabilizing module comprises: a fifth processing unit, configured to send the voltage stabilization signal to a co-phase power supply device to generate a compensation voltage parallel to the traction substation voltage; an eighth calculation unit, configured to calculate the compensation voltage and the third information to obtain an adjusted voltage; The sixth processing unit is used to perform voltage stabilization control on the traction network according to the adjusted voltage.

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