Traction transformer ratio differential protection performance test method, system and equipment

Abstract

The invention discloses a traction transformer ratio differential protection performance testing method, system and device, and relates to the technical field of traction transformer performance testing, and the method comprises the steps: obtaining the specification information of a detection object, and collecting the real-time characteristic data information of the high and low voltage sides of the detection object; according to the invention, the action state interval data of the differential action and the braking action in the detected object are determined according to the model specification of the transformer of the detected object and the characteristic expression data of the high-voltage side and the low-voltage side; and then real-time data of the detected object is collected and matched with action state interval data of differential action and braking action in the detected object, the real-time feedback action condition of the detected object is judged, whether the detected object has a fault or not is determined, and the state of the detected object is judged. The defect that in the prior art, a traction transformer ratio differential protection test of a high-speed rail maintenance pipe is not high in reliability is effectively overcome.

Description

Technical Field

[0001] The present invention relates to the technical field of traction transformer performance testing, and in particular to a traction transformer ratio differential protection performance testing method, system and equipment. Background Art

[0002] There are many types of traction transformers maintained by high-speed railways, and the differences in their internal structures and the diversity and complexity of the ratio differential protection principle place high technical requirements on testers, making it difficult to achieve a complete test. In addition, the ratio differential protection test of traction transformers maintained by high-speed railways is limited by the testers' own operating level and their incomplete understanding of the protection principle. Usually, a single-phase current is simply loaded, and the protection device is differentially actuated. The verification of the action zone, braking zone range, and action exit time is not considered, and the steps are cumbersome and the test efficiency is low, resulting in defects and incompleteness in the test method for the ratio differential protection of traction transformers. The reliability, sensitivity, speed and correctness of the ratio braking characteristic range of the differential protection device cannot be fully verified, and the defects of the protection device cannot be detected, especially for protection devices that have been in operation for many years. It is impossible to verify the defects of the protection device such as aging of electrical components, poor oxidation contact of contacts, and runaway of the program after long-term operation. Summary of the invention

[0003] The purpose of the present invention is to solve the shortcoming of low reliability of the ratio differential protection test of the traction transformer of the high-speed railway maintenance in the prior art, and to propose a traction transformer ratio differential protection performance test method, system and equipment.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions: In a first aspect, the present invention provides a method for testing performance of a traction transformer ratio differential protection, comprising: Obtain specification information of the detection object, and collect real-time characteristic data information of the high and low voltage sides of the detection object respectively; According to the specification information of the detection object, the real-time characteristic data information of the high and low pressure sides of the detection object is converted to respectively determine the test data information of the high and low pressure sides of the detection object; Adjust and balance the test data information of the high and low voltage sides of the detection object to determine the action trigger interval information of the detection object; According to the action trigger interval information of the action trigger interval of the detection object and in combination with the specification information of the detection object, the action state judgment information of the detection object is produced; The real-time characteristic data information of the high and low pressure sides of the detection object is collected again, and matched with the action state judgment information of the detection object to determine the real-time state of the detection object.

[0005] In some feasible solutions, the method for determining the action triggering interval information of the detection object includes: Collect three-phase current data on the high-voltage side of at least one group of detection objects, and collect real-time current data on the low-voltage side of at least two groups of detection objects to determine real-time data information on the high-voltage and low-voltage sides of the detection objects; According to the specification information of the test object, the real-time data information of the high and low pressure sides of the test object is processed to determine the simulation experimental data of the test object; According to the specification information of the detection object, the motion simulation is performed with the simulation experimental data of the detection object to determine the simulated motion state information of the detection object; According to the simulated action state information of the detection object and in combination with the simulated experimental data of the detection object, the action triggering interval information of the detection object is determined.

[0006] In some feasible solutions, the method for determining the real-time data information of the high and low pressure sides of the detection object includes: Processing of three-phase data on the high-voltage side of the detection object: Formula 1; In formula 1, , , They are the calculated currents of the three phases A, B, and C on the high voltage side participating in differential and braking, , , They are the three-phase sampling currents of A, B and C on the high-voltage side respectively; Real-time current data processing on the low-voltage side of the detection object: Formula 2; In formula 2, , They are the sampling currents of phase T1 and phase F1 on the low voltage side respectively. , They are the sampling currents of phase T2 and phase F2 on the low voltage side respectively. The calculated current of the low voltage side T1 phase and F1 phase participating in differential and braking, It is the calculated current of the low voltage side T2 phase and F2 phase participating in differential and braking.

[0007] In some feasible solutions, the method for determining the simulated experimental data of the detection object includes: Based on the high-voltage side current of the detection object, the low-voltage side current of the detection object is balanced and adjusted, specifically: Formula 3; Formula 4; Formula 5; In equations 3 to 5, The transformer winding turns ratio of the test object, is the transformer a-phase balance coefficient of the test object, The b-phase balance coefficient of the transformer to be tested, The rated line voltage of the high-voltage busbar of the test object, The rated voltage of the low-voltage busbar of the test object, is the high pressure side flow interconversion ratio, is the interconversion ratio of phase a flow on the low-pressure side, is the transformation ratio of phase b flow on the low-pressure side.

[0008] In some feasible solutions, the method for determining the simulated action state information of the detection object includes: The differential current calculation formula of the detection object is: Formula 6; The calculation formula of the braking current of the detection object is: Formula 7; In equations 6 and 7, is the A-phase differential current of the detection object, The A-phase braking current of the detection object; is the B-phase differential current of the detection object, is the braking current of phase B; is the C-phase differential current of the detection object, is the braking current of phase C; According to Formula 6 and Formula 7, the simulated action state information of the detection object is calculated respectively.

[0009] In some feasible solutions, the method for determining the action triggering interval information of the detection object further includes: Collecting real-time data information of high and low pressure sides of multiple groups of detection objects respectively, and determining at least two simulated action state information of the detection objects; According to two simulated action state information of the detection object, respectively determine different simulated action data interval information of the detection object; According to different simulated action data interval information of the detection object and in combination with two simulated action state information of the detection object, action trigger interval information of the detection object is formulated.

[0010] In some feasible solutions, the method for formulating the action triggering interval information of the detection object includes: Formula 8; In formula 8, is the differential current of any phase among the three phases of the detection object, The braking current of any phase among the three phases of the detection object. is the setting value of the phase ratio differential starting current of any one of the three phases of the detection object, , They are the first and second stage braking current setting values ​​of any phase in the three phases. , is the ratio coefficient of the two sections.

[0011] In some feasible solutions, the action triggering interval information of the detection object includes: Use line chart to display the interval.

[0012] In a second aspect, the present invention provides a traction transformer ratio differential protection performance test system, which adopts a traction transformer ratio differential protection performance test method described in any one of the first aspects, and the test system comprises: A current acquisition module, which is used to collect current data on the high and low voltage sides of the detection object; A data processing module, the data processing module is used to process and balance the high and low voltage side current data of the detection object; A data analysis module is used to analyze the action state of the detection object according to the high and low voltage side current data of the detection object.

[0013] In a third aspect, the present invention provides a traction transformer ratio differential protection performance test device, wherein the test device adopts a traction transformer ratio differential protection performance test method described in any one of the first aspects.

[0014] The beneficial effects of the present invention are: The present invention determines the action state interval data of differential action and braking action in the detected object according to the transformer model specification and characteristic performance data of the high and low voltage sides of the detected object, and then collects the real-time data of the detected object and matches it with the action state interval data of differential action and braking action in the detected object, and judges the real-time feedback action of the detected object, determines whether the detected object has a fault and judges the state of the detected object. That is, it effectively solves the disadvantage of low reliability of the ratio differential protection test of the traction transformer of the high-speed railway maintenance in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of a method for testing the performance of a traction transformer ratio differential protection provided in an embodiment of the present invention; Figure 2 It is a partial structural schematic diagram of a traction transformer ratio differential protection performance testing method provided in an embodiment of the present invention; Figure 3 It is a schematic diagram of the action characteristic diagram of the differential action and braking action of the detection object in a traction transformer ratio differential protection performance test method provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0018] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0019] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0020] Reference Figures 1 to 3In order to solve the shortcoming of low reliability of ratio differential protection test of traction transformer in high-speed railway maintenance in the prior art, the present invention provides a traction transformer ratio differential protection performance test method in this embodiment. The test method determines the action state interval data of differential action and braking action in the detected object according to the transformer model specification and characteristic performance data of high and low voltage sides of the detected object, and then collects the real-time data of the detected object and matches it with the action state interval data of differential action and braking action in the detected object, and judges the real-time feedback action status of the detected object, determines whether the detected object has a fault and judges the state of the detected object. That is, it effectively solves the shortcoming of low reliability of ratio differential protection test of traction transformer in high-speed railway maintenance in the prior art.

[0021] Specifically, the present invention provides a traction transformer ratio differential protection performance test method in the first aspect, the test method includes: the model specification of the detected object can be pre-wired wirelessly or wired, that is, the specification information of the detected object is obtained, and the real-time characteristic data information of the high and low voltage sides of the detected object is collected respectively; that is, according to the working energy efficiency specification size information of the detected object, the real-time data of the high and low voltage sides of the detected object can be extracted at the same time to provide a basis for judging its working state in the future. Then, according to the specification information of the detected object, the real-time characteristic data information of the high and low voltage sides of the detected object is converted, and the test data information of the high and low voltage sides of the detected object is determined respectively; that is, according to the real-time characteristic current and model specifications of the detected object, the test situation of the detected object is preliminarily understood, and then the test data information of the high and low voltage sides of the detected object is adjusted and balanced to determine the action trigger interval information of the detected object; that is, according to the action state of the detected object and the test current data of its high voltage side, the current characteristic data of the execution action of the different action states of the detected object can be determined. Then, according to the action trigger interval information of the action trigger interval of the detection object, combined with the specification information of the detection object, the action state judgment information of the detection object is produced; that is, according to the current characteristic data of the execution action of the different action states of the detection object, the corresponding data interval in the detection object (such as the action characteristic diagram representing the differential action and braking action of the detection object) can be determined. When it is necessary to perform action characteristic detection on the detection object, it is only necessary to collect the real-time characteristic data information of the high and low voltage sides of the detection object for a second time, and match it with the action state judgment information of the detection object to determine the real-time state of the detection object. That is, the execution action characteristic diagram of the detection object can be determined in advance based on the working information such as the model specification and power size of the detection object, and combined with the actual measured data of the high and low voltage sides of the detection object. When it is necessary to perform action characteristic detection on the detection object, it is only necessary to collect the real-time operating characteristic current data of the high and low voltage sides of the detection object for a second time, that is, it is possible to judge the state of the detection object or judge whether the detection object has a fault.

[0022] In the present embodiment, in order to facilitate understanding of how to extract features from the real-time data on the high and low voltage sides of the detection object based on the working energy efficiency specification size information of the detection object, the following explanation is given here. Specifically, the method for determining the action trigger interval information of the detection object includes: collecting at least one group of three-phase current data on the high-voltage side of the detection object, and collecting at least two groups of real-time current data on the low-voltage side of the detection object to determine the real-time data information on the high and low voltage sides of the detection object; then, according to the specification information of the detection object, processing the real-time data information on the high and low voltage sides of the detection object to determine the simulation experimental data of the detection object; then, according to the specification information of the detection object, performing action simulation with the simulation experimental data of the detection object to determine the simulation action state information of the detection object; finally, the action trigger interval information of the detection object can be determined based on the simulation action state information of the detection object and in combination with the simulation experimental data of the detection object.

[0023] More specifically, the following example is given to illustrate how to obtain the action trigger interval information of the detection object from the real-time data information of the high and low pressure sides of the detection object, and the following distinguishing description steps are performed. The method for determining the real-time data information of the high and low pressure sides of the detection object includes: Processing of three-phase data on the high-voltage side of the detection object: Formula 1; In formula 1, , , They are the calculated currents of the three phases A, B, and C on the high voltage side participating in differential and braking, , , They are the three-phase sampling currents of A, B and C on the high-voltage side respectively; Real-time current data processing on the low-voltage side of the detection object: Formula 2; In formula 2, , They are the sampling currents of phase T1 and phase F1 on the low voltage side respectively. , They are the sampling currents of phase T2 and phase F2 on the low voltage side respectively. The calculated current of the low voltage side T1 phase and F1 phase participating in differential and braking, It is the calculated current of the low voltage side T2 phase and F2 phase participating in differential and braking.

[0024] In this embodiment, the method for determining the simulated experimental data of the detection object includes: Based on the high-voltage side current of the detection object, the low-voltage side current of the detection object is balanced and adjusted, specifically: Formula 3; Formula 4; Formula 5; In equations 3 to 5, The transformer winding turns ratio of the test object, is the transformer a-phase balance coefficient of the test object, The b-phase balance coefficient of the transformer to be tested, The rated line voltage of the high-voltage busbar of the test object, The rated voltage of the low-voltage busbar of the test object, is the high pressure side flow interconversion ratio, is the interconversion ratio of phase a flow on the low-pressure side, is the transformation ratio of phase b flow on the low-pressure side.

[0025] In this embodiment, the method for determining the simulated action state information of the detection object includes: The differential current calculation formula of the detection object is: Formula 6; The calculation formula of the braking current of the detection object is: Formula 7; In equations 6 and 7, is the A-phase differential current of the detection object, The A-phase braking current of the detection object; is the B-phase differential current of the detection object, is the braking current of phase B; is the C-phase differential current of the detection object, is the braking current of phase C; According to Formula 6 and Formula 7, the simulated action state information of the detection object is calculated respectively.

[0026] In this embodiment, the method for determining the action trigger interval information of the detection object also includes: respectively collecting multiple groups of real-time data information of the high and low pressure sides of the detection object to determine at least two simulated action state information of the detection object; and then determining different simulated action data interval information of the detection object according to the two simulated action state information of the detection object; finally, according to the different simulated action data interval information of the detection object and in combination with the two simulated action state information of the detection object, the action trigger interval information of the detection object can be formulated.

[0027] Here, in order to facilitate understanding of how to formulate the action trigger interval information of the detection object, the following example is given to illustrate that the method of formulating the action trigger interval information of the detection object includes: Formula 8; In formula 8, is the differential current of any phase among the three phases of the detection object, The braking current of any phase among the three phases of the detection object. is the setting value of the phase ratio differential starting current of any one of the three phases of the detection object, , They are the first and second stage braking current setting values ​​of any phase in the three phases. , is a two-stage ratio coefficient. That is, in this embodiment, the action characteristic diagram of the differential action and the braking action of the detection object can be determined according to the model, specification and size of the detection object and its current characteristics in different states in the early stage (such as Figure 3 ). Among them, Figure 3 middle It is the ratio differential quick-break current setting value of any phase among the three phases.

[0028] Then, according to the action characteristic diagram of the differential action and braking action of the detection object, after collecting the real-time running current of the subsequent detection object, the braking action state of the subsequent detection object can be deduced and it can be judged whether the detection object has a fault. Figure 3 As shown, in some feasible solutions, in this embodiment, in order to facilitate the clear and intuitive determination of the execution action interval of the detection object, the action trigger interval information of the detection object includes: using a line graph to display the interval. In this embodiment, in order to facilitate the understanding of the above method of formulating the action trigger interval information of the detection object, the above figure can be used to represent the calculation according to formula 6 and formula 7 , Then, according to Formula 8, we can judge whether point A is in the action area, that is, the horizontal coordinate The corresponding vertical coordinate Is it greater than or equal to the height of AB plus , the height of AB is equal to the slope of the diagonal line AC of triangle ABC multiplied by the length of BC, that is , the length of BC is It should be noted that the coordinates of point A, point B, and point C can correspond to , The value is obtained.

[0029] In the second aspect, the present invention provides a traction transformer ratio differential protection performance test system, which adopts a traction transformer ratio differential protection performance test method described in any one of the first aspects, and the test system includes: a current acquisition module, a data processing module, and a data analysis module. The current acquisition module is used to collect current data on the high and low voltage sides of the detection object; the data processing module is used to process and balance the current data on the high and low voltage sides of the detection object; the data analysis module is used to analyze the action state of the detection object according to the current data on the high and low voltage sides of the detection object. The test system detects and collects the real-time current data of the detection object, and analyzes and determines the action state of the detection object (such as in a differential action state, in a braking action state) in combination with the model and specifications of the detection object, and then can deduce whether the detection object has a fault.

[0030] In some embodiments, the test system can communicate using any currently known or future developed network protocol such as HTTP (Hyper Text Transfer Protocol), and can be interconnected with any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include a local area network ("LAN"), a wide area network ("WAN"), an internet (e.g., the Internet), and a peer-to-peer network (e.g., an ad hoc peer-to-peer network), as well as any currently known or future developed network.

[0031] The functions described above herein may be performed at least in part by one or more hardware logic components. For example, exemplary types of hardware logic components that may be used include, without limitation, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), complex programmable logic devices (CPLDs), etc.

[0032] In a third aspect, the present invention provides a traction transformer ratio differential protection performance test device, wherein the test device adopts a traction transformer ratio differential protection performance test method described in any one of the first aspects. The test device ensures the detection effect of the detection object by adopting the above-mentioned test method, and can effectively determine whether the detection object has a fault.

[0033] The fourth aspect of the present invention provides a computer-readable medium having a computer program stored thereon, wherein when the program is executed by a processor, a method for testing the performance of a traction transformer ratio differential protection as described in any one of the first aspects is implemented. The computer-readable medium in this embodiment can be written in one or more programming languages ​​or a combination thereof to write computer program codes for performing the operations of some embodiments of the present disclosure, wherein the programming languages ​​include object-oriented programming languages, such as Java, Smalltalk, C++, and conventional procedural programming languages, such as "C" language or similar programming languages. The program code can be executed entirely on a user's computer, partially on a user's computer, as an independent software package, partially on a user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer can be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or can be connected to an external computer (for example, using an Internet service provider to connect through the Internet).

[0034] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present disclosure. In this regard, each square box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some implementations as replacements, the functions marked in the square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two square boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each square box in the block diagram and / or flow chart, and the combination of the square boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0035] In particular, according to some embodiments of the present disclosure, the process described above with reference to the flowchart can be implemented as a computer software program. For example, some embodiments of the present disclosure include a computer program product, which includes a computer program carried on a computer readable medium, and the computer program includes a program code for executing the method shown in the flowchart.

[0036] The fifth aspect of the present invention provides an electronic device, comprising: one or more processors; a storage device having one or more programs stored thereon; when the one or more programs are executed by the one or more processors, the one or more processors implement a traction transformer ratio differential protection performance test method as described in the first aspect. The above-mentioned computer-readable medium may be included in the above-mentioned electronic device; or it may exist independently, that is, it is not assembled into the electronic device. The above-mentioned computer-readable medium carries one or more programs, and when the above-mentioned one or more programs are executed by the electronic device, the electronic device can implement a traction transformer ratio differential protection performance test method as described in the first aspect.

[0037] The sixth aspect of the present invention further provides a computer program product, comprising a computer program, which, when executed by a processor, implements a traction transformer ratio differential protection performance testing method as described in the first aspect.

[0038] The above descriptions are only some preferred embodiments of the present disclosure and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the embodiments of the present disclosure is not limited to the technical solutions formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above inventive concept. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in the embodiments of the present disclosure.

Claims

1. A method for testing the performance of a traction transformer ratio differential protection, characterized in that: include: Obtain specification information of the detection object, and collect real-time characteristic data information of the high and low voltage sides of the detection object respectively; According to the specification information of the detection object, the real-time characteristic data information of the high and low pressure sides of the detection object is converted to respectively determine the test data information of the high and low pressure sides of the detection object; Adjust and balance the test data information of the high and low voltage sides of the detection object to determine the action trigger interval information of the detection object; According to the action trigger interval information of the action trigger interval of the detection object and in combination with the specification information of the detection object, the action state judgment information of the detection object is produced; The real-time characteristic data information of the high and low pressure sides of the detection object is collected again, and matched with the action state judgment information of the detection object to determine the real-time state of the detection object.

2. A traction transformer ratio differential protection performance testing method according to claim 1, characterized in that: The method for determining the action triggering interval information of the detection object includes: Collect three-phase current data on the high-voltage side of at least one group of detection objects, and collect real-time current data on the low-voltage side of at least two groups of detection objects to determine real-time data information on the high-voltage and low-voltage sides of the detection objects; According to the specification information of the test object, the real-time data information of the high and low pressure sides of the test object is processed to determine the simulation experimental data of the test object; According to the specification information of the detection object, the motion simulation is performed with the simulation experimental data of the detection object to determine the simulated motion state information of the detection object; According to the simulated action state information of the detection object and in combination with the simulated experimental data of the detection object, the action triggering interval information of the detection object is determined.

3. A traction transformer ratio differential protection performance testing method according to claim 2, characterized in that: The method for determining the real-time data information of the high and low pressure sides of the detection object comprises: Processing of three-phase data on the high-voltage side of the detection object: Formula 1; In formula 1, , , They are the calculated currents of the three phases A, B, and C on the high voltage side participating in differential and braking, , , They are the three-phase sampling currents of A, B and C on the high-voltage side respectively; Real-time current data processing on the low-voltage side of the detection object: Formula 2; In formula 2, , They are the sampling currents of phase T1 and phase F1 on the low voltage side respectively. , They are the sampling currents of phase T2 and phase F2 on the low voltage side respectively. The calculated current of the low voltage side T1 phase and F1 phase participating in differential and braking, It is the calculated current of the low voltage side T2 phase and F2 phase participating in differential and braking.

4. A traction transformer ratio differential protection performance testing method according to claim 3, characterized in that: The method for determining the simulated experimental data of the detection object comprises: Based on the high-voltage side current of the detection object, the low-voltage side current of the detection object is balanced and adjusted, specifically: Formula 3; Formula 4; Formula 5; In equations 3 to 5, The transformer winding turns ratio of the test object, is the transformer a phase balance coefficient of the test object, The b-phase balance coefficient of the transformer to be tested, The rated line voltage of the high-voltage busbar of the test object, The rated voltage of the low-voltage busbar of the test object, is the high pressure side flow interconversion ratio, is the interconversion ratio of phase a flow on the low-pressure side, is the transformation ratio of phase b flow on the low-pressure side.

5. A traction transformer ratio differential protection performance testing method according to claim 4, characterized in that: The method for determining the simulated action state information of the detection object comprises: The differential current calculation formula of the detection object is: Formula 6; The calculation formula of the braking current of the detection object is: Formula 7; In equations 6 and 7, is the A-phase differential current of the detection object, The A-phase braking current of the detection object; is the B-phase differential current of the detection object, is the braking current of phase B; is the C-phase differential current of the detection object, is the braking current of phase C; According to Formula 6 and Formula 7, the simulated action state information of the detection object is calculated respectively.

6. A traction transformer ratio differential protection performance testing method according to claim 5, characterized in that: The method for determining the action triggering interval information of the detection object also includes: Collecting real-time data information of high and low pressure sides of multiple groups of detection objects respectively, and determining at least two simulated action state information of the detection objects; According to two simulated action state information of the detection object, respectively determine different simulated action data interval information of the detection object; According to different simulated action data interval information of the detection object and in combination with two simulated action state information of the detection object, action trigger interval information of the detection object is formulated.

7. A traction transformer ratio differential protection performance testing method according to claim 6, characterized in that: The method for formulating the action triggering interval information of the detection object includes: Formula 8; In formula 8, is the differential current of any phase among the three phases of the detection object, The braking current of any phase among the three phases of the detection object. is the setting value of the phase ratio differential starting current of any one of the three phases of the detection object, 、 They are the first and second stage braking current setting values ​​of any phase in the three phases. , is the ratio coefficient of the two sections.

8. A traction transformer ratio differential protection performance testing method according to claim 1, characterized in that: The action triggering interval information of the detection object includes: Use line chart to display the interval.

9. A traction transformer ratio differential protection performance test system, characterized in that: A traction transformer ratio differential protection performance testing method according to any one of claims 1 to 8 is adopted, and the testing system comprises: A current acquisition module, which is used to collect current data on the high and low voltage sides of the detection object; A data processing module, the data processing module is used to process and balance the high and low voltage side current data of the detection object; A data analysis module is used to analyze the action state of the detection object according to the high and low voltage side current data of the detection object.

10. A traction transformer ratio differential protection performance test device, characterized in that: The test equipment adopts a traction transformer ratio differential protection performance test method as described in any one of claims 1 to 8.

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