Data processing methods, devices, equipment, media and products

Abstract

This application provides a data processing method, apparatus, device, medium, and product, including: acquiring line transmission data, first line mode data, and second line mode data of a high-voltage direct current (HVDC) transmission line; determining a first current value at a state estimation point of the HVDC transmission line based on the line transmission data and the first line mode data; determining a second current value at the state estimation point of the HVDC transmission line based on the line transmission data and the second line mode data; and determining the HVDC transmission line as a faulty line if the difference between the first current value and the second current value is greater than a preset threshold. This application embodiment can accurately determine faults in HVDC transmission lines, thereby ensuring the safe operation and stable functioning of the power system by timely disconnecting the faulty line.

Description

Technical Field

[0001] This application belongs to the field of power system relay protection technology, and in particular relates to a data processing method, device, equipment, medium and product. Background Technology

[0002] In real-world applications, high-voltage direct current (HVDC) transmission lines are widely used in power systems due to their advantages such as large transmission capacity and low cost. Consequently, power systems are susceptible to the impact of HVDC transmission line faults.

[0003] Therefore, to protect the power system from the impact of faults in high-voltage direct current (HVDC) transmission lines, it is necessary to quickly disconnect the faulty line in the event of a fault to ensure the safe and stable operation of the power system. However, existing fault detection technologies present a trade-off between speed and sensitivity, which in turn poses certain risks to ensuring the safe and stable operation of the power system. Summary of the Invention

[0004] This application provides a data processing method, apparatus, equipment, medium, and product that can accurately determine faults in high-voltage direct current transmission lines, and thus ensure the safe operation and stable functioning of the power system by timely disconnecting the faulty line.

[0005] In a first aspect, embodiments of this application provide a data processing method, the method comprising:

[0006] The transmission data, first line modulus data, and second line modulus data of the high-voltage direct current transmission line are obtained. The first line modulus data is the data modulus collected at the first end of the high-voltage direct current transmission line, and the second line modulus data is the data modulus collected at the second end of the high-voltage direct current transmission line.

[0007] Based on the line transmission data and the first line model data, the first current value of the state estimation point of the high voltage direct current transmission line is determined; and based on the line transmission data and the second line model data, the second current value of the state estimation point of the high voltage direct current transmission line is determined, the state estimation point being located between the first end and the second end of the high voltage direct current transmission line.

[0008] If the difference between the first current value and the second current value is greater than a preset threshold, the high-voltage direct current transmission line is determined to be a faulty line.

[0009] In an optional embodiment of the first aspect, acquiring first line mode data and second line mode data of a high-voltage direct current transmission line includes:

[0010] Acquire the first transmission line data at the first end of the high-voltage direct current transmission line, and the second transmission line data at the second end of the high-voltage direct current transmission line;

[0011] The first transmission line data and the second transmission line data are subjected to pole mode transformation processing respectively to obtain the first line mode data corresponding to the first transmission line data and the second line mode data corresponding to the second transmission line data.

[0012] In one alternative implementation of the first aspect, the line transmission data includes wave impedance data and line propagation coefficient, wherein the wave impedance data is positively correlated with the current frequency.

[0013] Based on the line transmission data and the first line model data, the first current value of the state estimation point of the high-voltage direct current transmission line is determined; and based on the line transmission data and the second line model data, the second current value of the state estimation point of the high-voltage direct current transmission line is determined, including:

[0014] The line propagation coefficient is input into a preset function for calculation to obtain the target sequence;

[0015] Based on the first line mode data, as well as the wave impedance data and target sequence, the first current value of the state estimation point of the high-voltage transmission line is determined;

[0016] Based on the second line mode data, as well as the wave impedance data and the target sequence, the second current value of the state estimation point of the high-voltage transmission line is determined.

[0017] In one optional implementation of the first aspect, the first line-mode data includes first line-mode current data and first line-mode voltage data; the second line-mode data includes second line-mode current data and second line-mode voltage data.

[0018] In an optional implementation of the first aspect, determining a first current value at a state estimation point of the high-voltage transmission line based on first line mode data, wave impedance data, and a target sequence includes:

[0019] Based on the convolution of the first line mode voltage data, the first line mode current data, and the wave impedance data, the traveling wave data of the first end of the high voltage direct current transmission line is determined.

[0020] Based on the traveling wave data at the first end and the target sequence, the traveling wave data of the state estimation point of the high-voltage transmission line is determined, wherein the traveling wave data at the first end is equal to the convolution of the target sequence and the traveling wave data of the state estimation point.

[0021] The first current value is determined based on the traveling wave data of the state estimation point of the high-voltage direct current transmission line.

[0022] In an optional embodiment of the first aspect, the traveling wave data at the first end includes first forward traveling wave data and first reverse traveling wave data; determining the traveling wave data at the first end of the high-voltage direct current transmission line based on the convolution of first line mode voltage data, first line mode current data, and wave impedance data includes:

[0023] The sum of the convolution of the first line mode voltage data, the first line mode current data, and the wave impedance data is determined to be the first positive traveling wave data;

[0024] The difference between the first line mode voltage data and the convolution of the first line mode current data and the wave impedance data is determined as the first reverse traveling wave data;

[0025] The first positive traveling wave data is the traveling wave data that passes through the first end during the process of flowing from the first end to the second end of the high-voltage direct current transmission line, and the first reverse traveling wave data is the traveling wave data that passes through the first end during the process of flowing from the second end to the first end of the high-voltage direct current transmission line.

[0026] In an optional implementation of the first aspect, determining a second current value at the state estimation point of the high-voltage transmission line based on second line mode data, wave impedance data, and a target sequence includes:

[0027] Based on the convolution of the second line mode voltage data, the second line mode current data, and the wave impedance data, the traveling wave data at the second end of the high voltage direct current transmission line is determined.

[0028] Based on the traveling wave data at the second end and the target sequence, the traveling wave data of the state estimation point of the high voltage direct current transmission line is determined, wherein the traveling wave data at the second end is equal to the convolution of the target sequence and the traveling wave data of the state estimation point.

[0029] The second current value is determined based on the traveling wave data of the state estimation point of the high-voltage direct current transmission line.

[0030] In an optional embodiment of the first aspect, the traveling wave data at the second end includes second forward traveling wave data and second reverse traveling wave data.

[0031] Based on the convolution of second-line mode voltage data, second-line mode current data, and wave impedance data, the traveling wave data at the second end of the HVDC transmission line is calculated, including:

[0032] The sum of the convolution of the second line mode voltage data, the second line mode current data, and the wave impedance data is determined to be the second positive traveling wave data;

[0033] The difference between the convolution of the second line mode voltage data and the second line mode current data and wave impedance data is determined as the second reverse traveling wave data;

[0034] The second positive traveling wave data is the traveling wave data that passes through the second end during the process of flowing from the first end to the second end of the high-voltage direct current transmission line, and the second negative traveling wave data is the traveling wave data that passes through the second end during the process of flowing from the second end to the first end of the high-voltage direct current transmission line.

[0035] In an optional implementation of the first aspect, the target sequence includes a first sequence and a second sequence, wherein the Nth first value contained in the first sequence and the Nth second value contained in the second sequence are reciprocals of each other, and N is a positive integer; the traveling wave data of the state estimation point includes third forward traveling wave data and third reverse traveling wave data;

[0036] The first reverse traveling wave data is equal to the convolution of the third forward traveling wave data and the first sequence; the first forward traveling wave data is equal to the convolution of the third reverse traveling wave data and the second sequence.

[0037] The second reverse traveling wave data is equal to the convolution of the third forward traveling wave data and the first sequence; the second forward traveling wave data is equal to the convolution of the third reverse traveling wave data and the numerical value.

[0038] Secondly, embodiments of this application provide a data processing apparatus, the apparatus comprising:

[0039] The acquisition module is used to acquire line transmission data, first line modulus data and second line modulus data of the high voltage direct current transmission line. The first line modulus data is the data modulus collected at the first end of the high voltage direct current transmission line and the second line modulus data is the data modulus collected at the second end of the high voltage direct current transmission line.

[0040] The determination module is used to determine the first current value of the state estimation point of the high voltage direct current transmission line based on the line transmission data and the first line mode data; and to determine the second current value of the state estimation point of the high voltage direct current transmission line based on the line transmission data and the second line mode data, wherein the state estimation point is located between the first end and the second end of the high voltage direct current transmission line.

[0041] The determination module is also used to determine that the high-voltage direct current transmission line is a faulty line when the difference between the first current value and the second current value is greater than a preset threshold.

[0042] In a third aspect, an electronic device is provided, comprising: a memory for storing computer program instructions; and a processor for reading and executing the computer program instructions stored in the memory to perform a data processing method provided by any optional embodiment of the first aspect.

[0043] Fourthly, a computer storage medium is provided, on which computer program instructions are stored, which, when executed by a processor, implement the data processing method provided by any optional embodiment of the first aspect.

[0044] Fifthly, a computer program product is provided, wherein instructions in the computer program product, when executed by a processor of an electronic device, cause the electronic device to perform a data processing method provided by any optional embodiment of the first aspect.

[0045] In this embodiment, by acquiring line transmission data, first line data, and second line data of a high-voltage direct current (HVDC) transmission line, a first current value at the state estimation point of the HVDC transmission line can be determined based on the line transmission data and the first line data. A second current value at the state estimation point of the HVDC transmission line can be determined based on the line transmission data and the second line mode data. Therefore, if the difference between the first current value and the second current value is greater than a preset threshold, the HVDC transmission line can be identified as a faulty line. Since the state estimation point is located between the first and second ends of the HVDC transmission line, by determining the current value at the state estimation point based on the first line mode data and the second line data respectively, the fault of the HVDC transmission line can be accurately determined. This allows for timely disconnection of the faulty line, ensuring the safe operation and stable functioning of the power system. Attached Figure Description

[0046] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0047] Figure 1 This is a flowchart of the algorithm for fault isolation and recovery of DC power distribution lines provided in the embodiments of this application;

[0048] Figure 2 This is a schematic diagram of a multi-segment, multi-interconnection DC distribution network provided in an embodiment of this application;

[0049] Figure 3 This is a schematic diagram of a uniform single-phase transmission line under the distributed parameter model of the input line provided in the embodiments of this application;

[0050] Figure 4 This is a schematic diagram of DC power distribution line fault isolation provided in an embodiment of this application;

[0051] Figure 5 This is a flowchart illustrating a data processing method provided in an embodiment of this application;

[0052] Figure 6 This is a flowchart illustrating another data processing method provided in an embodiment of this application;

[0053] Figure 7 This is a flowchart illustrating another data processing method provided in an embodiment of this application;

[0054] Figure 8 Z is provided in the embodiments of this application. c (n) Amplitude-frequency response and phase-frequency response;

[0055] Figure 9 This is a schematic diagram of the structure of a data processing device provided in an embodiment of this application;

[0056] Figure 10 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Detailed Implementation

[0057] The features and exemplary embodiments of various aspects of this application will be described in detail below. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain this application and not to limit it. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples.

[0058] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0059] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone.

[0060] In the existing technology, the formulas used to calculate the forward and reverse traveling waves can be as shown in formula (1):

[0061]

[0062] Existing traveling wave estimation methods are inadequate for estimating two points x and y on a transmission line. It can be shown in formula (2):

[0063]

[0064] Furthermore, the above formulas (1) and (2) are derived based on the following formula, and the specific derivation process is as follows:

[0065] First, it should be noted that the DC transmission system model used in the embodiments of this application can be as follows: Figure 1 As shown, the line has a rated voltage of ±500kV, a rated current of 2kA, and a total length of 600km. The tower model of the line is shown below. Figure 2 As shown. Based on the tower parameters, the calculated line-mode wave velocity is 2.976 × 10⁸ m / s, and the line-mode wave impedance is 220.45 Ω.

[0066] Since the DC transmission system model is a distributed parameter model of a uniform transmission line, that is, described by the resistance R, inductance L, conductance G, and capacitance C per unit length of the line, as follows: Figure 3 The figure shows a uniform single-phase transmission line under a distributed parameter model. The voltage u(x,t) and current i(x,t) at any point on the line are functions of both time t and location x. When the frequency-dependent characteristics of the line parameters are neglected, according to... Figure 1 The following relationship can be established between voltage and current:

[0067]

[0068] Furthermore, the above formula (3) can be simplified to:

[0069]

[0070] If the resistance and conductance of the line are ignored, the above formula (4) can be further simplified to:

[0071]

[0072] The above equation is in the form of the standard one-dimensional homogeneous wave equation, which has the following general solution:

[0073]

[0074] Where u f and i f They are respectively called the forward voltage traveling wave and the forward current traveling wave because they move along the positive x-axis at a velocity v; u r and i r These are respectively called reverse voltage traveling waves and reverse current traveling waves because they move along the negative x-axis with a velocity v. The expression for the wave velocity v is as follows:

[0075]

[0076] In the general solution of the above one-dimensional homogeneous wave equation, the following constraints also satisfy the relationships between the forward voltage traveling wave and the forward current traveling wave, as well as between the reverse voltage traveling wave and the reverse current traveling wave:

[0077]

[0078] Where uf(t) and ur(t) can be any twice differentiable functions, their specific forms determined by the boundary conditions and initial conditions. Zc is called the wave impedance data of the line, and its expression is as follows:

[0079]

[0080] From the general solution of the equation, it can be seen that the voltage and current at any point on the line can be regarded as the superposition of forward and reverse traveling waves. Similarly, based on the voltage and current at a certain point, the formulas (1) for the forward and reverse traveling waves at that point can be calculated. Therefore, the voltage and current of the transmission line can be viewed from the perspective of moving traveling waves, that is, the voltage and current on the line are the superposition of constantly moving traveling waves. For two points x and y on the transmission line... Formula (2) can also be deduced from the above formula.

[0081] Therefore, after obtaining formulas (1) and (2) in the existing technology, when judging whether a high-voltage direct current (HVDC) transmission line is faulty, it is assumed that the first end of the HVDC transmission line is x = 0 and the second end is x = l, where l is the total length of the line. After sampling the voltage and current data of the first and second ends of the HVDC transmission line respectively, and after time stamping the sampled data according to GPS, and after performing pole-mode transformation processing, the traveling wave data of the first end can be calculated based on the voltage and current data of the first end. The specific calculation formula is as follows:

[0082]

[0083] Furthermore, the traveling wave data at the state estimation point x0 can be calculated according to the following formula (11):

[0084]

[0085] Furthermore, based on the traveling wave data at x0, the first current value at x0 can be calculated, and the specific calculation formula is shown below:

[0086]

[0087] The superscript M indicates that the formula only uses the voltage and current data measured at the first terminal.

[0088] Furthermore, the traveling wave data at the second end of the high-voltage direct current transmission line can be calculated based on the voltage and current data at the second end, as shown in the following formula:

[0089]

[0090] Then, the traveling wave data at x0 can be calculated based on the traveling wave data at the second end:

[0091]

[0092] Furthermore, the second current value at x0 can be calculated based on the traveling wave data at x0, and the specific calculation formula is shown below:

[0093]

[0094] The superscript N indicates that the formula only uses the voltage and current data measured at the second terminal.

[0095] Finally, the fault status of the high-voltage direct current transmission line can be determined based on the calculated first and second current values.

[0096] Based on the above, the figure shows a comparison of the fault identification results using the above methods under two typical fault conditions. For the high-resistance fault within the zone, the fault point is set at the N-side outlet with a transition resistance of 500Ω. For the metallic fault outside the zone, the fault point is set at the N-side outside the zone with a transition resistance of 0. Figure 4 In the diagram, (a) represents the current on both sides under a high-resistance fault within the zone, (b) represents the current on both sides under a metallic fault outside the zone, (c) represents the differential current under a high-resistance fault within the zone, and (d) represents the differential current under a metallic fault outside the zone. It can be seen that under a high-resistance fault within the zone, the difference in current between the two sides is small, but the differential current is significant. In this case, a traditional differential protection would fail to operate, but the protection in this invention will operate reliably with an operating time of approximately 11ms. Under a metallic fault outside the zone, although the difference in current between the two sides is significant, the protection reliably does not operate during the above process.

[0097] However, existing technologies assume that the HVDC transmission lines used are lossless and that the line parameters do not change with the current frequency. In reality, however, in long HVDC transmission lines, the resistance and conductance cause traveling wave attenuation, and the line parameters do change with frequency. Therefore, the accuracy of existing technologies in determining whether a HVDC transmission line has a fault is relatively low.

[0098] In summary, to address the problem in existing technologies that cannot accurately determine faults in high-voltage direct current (HVDC) transmission lines, and consequently cannot promptly disconnect faulty lines to ensure the safe and stable operation of the power system, this application provides a data processing method, apparatus, device, medium, and product. This method acquires line transmission data, first line data, and second line data of the HVDC transmission line. Based on the line transmission data and the first line data, it determines a first current value at the state estimation point of the HVDC transmission line, and based on the line transmission data and the second line mode data, it determines a second current value at the state estimation point. If the difference between the first and second current values ​​exceeds a preset threshold, the HVDC transmission line is determined to be a faulty line. Since the state estimation point is located between the first and second ends of the HVDC transmission line, by determining the current value at the state estimation point based on the first line mode data and the second line data respectively, faults in the HVDC transmission line can be accurately determined. This allows for timely disconnection of the faulty line, ensuring the safe and stable operation of the power system.

[0099] The data processing method provided in this application embodiment can be executed by a data processing device. The data processing device can be a microcomputer protection device deployed at the first or second end of a high-voltage direct current transmission line, or a control module in the data processing device used to execute the data processing method. In this application embodiment, the execution of a data processing scheme by a data processing device is used as an example to illustrate the data processing method provided in this application embodiment.

[0100] The data processing method provided in this application will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0101] Figure 5 This is a flowchart illustrating a data processing method provided in an embodiment of this application.

[0102] like Figure 5 As shown, the device for executing this data processing method is a data processing apparatus, which may specifically include the following steps:

[0103] S510 acquires the line transmission data, first line mode data, and second line mode data of the high-voltage direct current transmission line.

[0104] The data processing device can acquire the line transmission data, first line mode data, and second line mode data of the high-voltage direct current transmission line when checking whether the high-voltage direct current transmission line has a fault, so as to subsequently determine whether the high-voltage direct current transmission line has a fault.

[0105] The transmission data can be data related to transmission consumption of the high-voltage direct current (HVDC) transmission line. The first line mode data can be the data mode collected at the first end of the HVDC transmission line, and the second line mode data can be the data mode collected at the second end of the HVDC transmission line.

[0106] S520, based on the line transmission data and the first line model data, determines the first current value of the state estimation point of the high voltage direct current transmission line; and based on the line transmission data and the second line model data, determines the second current value of the state estimation point of the high voltage direct current transmission line.

[0107] The state estimation point is located between the first and second ends of the high-voltage direct current transmission line.

[0108] After acquiring line transmission data, first line mode data, and second line mode data, the data processing device can determine the first current value of the state estimation point of the high-voltage direct current transmission line based on the acquired line transmission data and first line mode data, and determine the second current value of the state estimation point of the high-voltage direct current transmission line based on the acquired second line data of the line transmission data.

[0109] S530: If the difference between the first current value and the second current value is greater than a preset threshold, the high-voltage direct current transmission line is determined to be a faulty line.

[0110] The preset threshold can be a threshold that is pre-set based on actual experience.

[0111] Specifically, the data processing device can determine that a high-voltage direct current transmission line is a faulty line if the difference between the first current value and the second current value is greater than a preset threshold.

[0112] In this embodiment, by acquiring line transmission data, first line data, and second line data of a high-voltage direct current (HVDC) transmission line, a first current value at the state estimation point of the HVDC transmission line can be determined based on the line transmission data and the first line data. A second current value at the state estimation point can be determined based on the line transmission data and the second line mode data. If the difference between the first and second current values ​​exceeds a preset threshold, the HVDC transmission line can be identified as a faulty line. Since the state estimation point is located between the first and second ends of the HVDC transmission line, determining the current value at the state estimation point based on the first line mode data and the second line data allows for accurate fault identification of the HVDC transmission line. This enables timely disconnection of the faulty line to ensure the safe and stable operation of the power system.

[0113] In order to accurately obtain the first line mode data and the second line mode data, in one embodiment of this application, the steps for obtaining the first line mode data and the second line mode data of the high-voltage direct current transmission line may specifically include the following steps:

[0114] Acquire the first transmission line data at the first end of the high-voltage direct current transmission line, and the second transmission line data at the second end of the high-voltage direct current transmission line;

[0115] The first transmission line data and the second transmission line data are subjected to pole mode transformation processing respectively to obtain the first line mode data corresponding to the first transmission line data and the second line mode data corresponding to the second transmission line data.

[0116] The first transmission line data can be time-stamped line data collected at the first end of the HVDC transmission line, and the second transmission line data can be time-stamped line data collected at the second end of the HVDC transmission line. The time stamp is a time stamp applied to the acquired first and second transmission line data based on GPS data at the current moment of data acquisition; that is, the time stamp represents the time of data acquisition. It should be noted that the first transmission line data may include voltage and current data at the first end of the HVDC transmission line, and the second transmission line data is similar to the first transmission line data, which will not be elaborated upon here.

[0117] The data processing device can acquire first transmission line data at the first end of a high-voltage direct current (HVDC) transmission line and second transmission line data at the second end of a HVDC transmission line according to a preset sampling rate. It then performs pole-mode transformation processing on the first and second transmission line data respectively to obtain first line-mode data corresponding to the first transmission line data and second line-mode data corresponding to the second transmission line data. The preset sampling rate can be a rate pre-set based on practical experience or circumstances, and is not limited in detail here; for example, the sampling rate could be 10kHz.

[0118] Specifically, the first transmission line data and the second transmission line data can be processed by pole mode transformation using the following formula (18) to obtain the first line mode data corresponding to the first transmission line data and the second line mode data corresponding to the second transmission line data.

[0119]

[0120] Among them, a p 、a nThese can be the positive and negative data of the first transmission line before pole-mode conversion processing, or the positive and negative data of the second transmission line. a1 represents the first or second line-mode data after pole-mode conversion processing, a0 represents the first or second zero-mode data before pole-mode conversion processing, and T is the transformation matrix.

[0121] In this embodiment, after acquiring the first transmission line data at the first end of the high-voltage direct current (HVDC) transmission line and the second transmission line data at the second end of the HVDC transmission line, the data processing device can perform pole-mode transformation processing on the first and second transmission line data respectively to obtain first line mode data corresponding to the first transmission line data and second line data corresponding to the second transmission line data. This avoids inaccurate judgments due to coupling caused by bipolar lines when subsequently determining whether the HVDC transmission line is faulty, thereby improving the accuracy of determining whether the HVDC transmission line is faulty.

[0122] To more accurately calculate the current values ​​at the state estimation points of the HVDC transmission line determined based on the first line model data and the second line model data, so as to subsequently determine whether a fault has occurred in the HVDC transmission line based on the determined current values, in a specific embodiment, the line transmission data acquired by the data processing device may include wave impedance data and line propagation coefficient, and the wave impedance data is positively correlated with the current frequency. Based on this, the aforementioned S520 may specifically include the following steps:

[0123] The line propagation coefficient is input into a preset function for calculation to obtain the target sequence;

[0124] Based on the first line mode data, as well as the wave impedance data and target sequence, the first current value of the state estimation point of the high-voltage transmission line is determined;

[0125] Based on the second line mode data, as well as the wave impedance data and the target sequence, the second current value of the state estimation point of the high-voltage transmission line is determined.

[0126] The preset function can be a function pre-defined based on actual conditions. The line propagation coefficient can be used to characterize the data transmission loss in a high-voltage direct current (HVDC) transmission line, and the wave impedance data can be the characteristic impedance of the HVDC transmission line. The target sequence can be the value calculated by inputting the line propagation data into the preset function.

[0127] Specifically, after the data processing device acquires the line transmission coefficient and wave impedance data included in the line transmission data, it can calculate the target data value by inputting the line propagation coefficient into a preset function. Then, based on the first line mode data, wave impedance data and target data sequence, it can determine the first current value of the state estimation point of the high-voltage transmission line, and based on the second line mode data, wave impedance data and target data sequence, it can determine the second current value of the state estimation point of the high-voltage direct current transmission line.

[0128] In this embodiment, since the acquired line transmission data may include line transmission coefficient and wave impedance data, and the data processing device can input the line transmission coefficient into a preset function for calculation to obtain the target data, the data processing device can calculate the first current value and the second current value based on the first line mode data and the second line mode data, as well as the wave impedance data and the target sequence. Thus, by introducing the line propagation coefficient and wave impedance data of the HVDC transmission line, the attenuation of traveling waves caused by the resistance and conductance of the HVDC transmission line, and the corresponding changes in some parameters of the HVDC transmission line due to changes in current frequency, can be avoided when the line is too long. This results in more accurate calculation results and facilitates accurate subsequent determination of whether a fault has occurred in the HVDC transmission line.

[0129] In some embodiments, the first line-mode data may include first line-mode current data and first line-mode voltage data; the second line-mode data may include second line-mode current data and second line-mode voltage data.

[0130] The first line-mode current data can be the current modulus collected at the first end of the HVDC transmission line, and the first line-mode voltage data can be the voltage modulus collected at the second end of the HVDC transmission line. Similarly, the second line-mode current data and the second line-mode voltage data can be the current modulus collected at the second end of the HVDC transmission line.

[0131] Based on this, in one embodiment, such as Figure 6 As shown, the steps mentioned above for determining the first current value of the state estimation point of a high-voltage transmission line based on the first line mode data, wave impedance data, and target sequence may specifically include the following steps:

[0132] S610 determines the traveling wave data at the first end of the high-voltage direct current transmission line based on the convolution of the first line mode voltage data, the first line mode current data, and the wave impedance data.

[0133] Specifically, the data processing device can first obtain the convolution between the first line-mode voltage data and the wave impedance data included in the first line-mode data. Then, after obtaining the convolution between the first line-mode voltage data and the wave impedance data, it can combine the first line-mode voltage data included in the first line-mode data to determine the traveling wave data at the first end of the high-voltage direct current transmission line. The traveling wave data at the first end can be a wave formed at the first end of the high-voltage direct current transmission line, where the spatial distribution of the current travels in a certain direction (continuously advancing) over time with a constant amplitude, and the propagation direction is infinite.

[0134] S620 determines the traveling wave data of the state estimation point of the high-voltage transmission line based on the traveling wave data of the first end and the target sequence.

[0135] Among them, the traveling wave data at the first end is equal to the convolution of the target sequence and the traveling wave data of the state estimation point.

[0136] Since the traveling wave data at the first end is equal to the convolution of the target sequence and the traveling wave data at the state estimation point, the data processing device can determine the traveling wave data at the state estimation point of the high-voltage direct current transmission line based on the traveling wave data at the first end and the target sequence after determining the traveling wave data at the first end.

[0137] S630 determines the first current value based on the traveling wave data of the state estimation point of the high-voltage direct current transmission line.

[0138] After determining the traveling wave data of the state estimation point of the high-voltage direct current transmission line, the data processing device can determine a first current value based on the traveling wave data of the state estimation point of the high-voltage direct current transmission line. Since the formula for determining the first current value is existing technology, it is not specified further here.

[0139] In this embodiment, the data processing device can determine the traveling wave data at the first end of the high-voltage direct current (HVDC) transmission line based on the first line-mode voltage data and the convolution of the first line-mode current data and the surge impedance data. Then, based on the traveling wave data at the first end and the target sequence, it can determine the traveling wave data at the state estimation point of the HVDC transmission line. Finally, it can calculate the first current value based on the traveling wave data at the state estimation point. Based on this, the first current value can be calculated accurately.

[0140] Since the traveling wave data at the first end may include first forward traveling wave data and first reverse traveling wave data, in one embodiment, the above-mentioned S610 may include the following steps:

[0141] The sum of the convolution of the first line mode voltage data, the first line mode current data, and the wave impedance data is determined to be the first positive traveling wave data;

[0142] The difference between the first line mode voltage data and the convolution of the first line mode current data and the wave impedance data is determined as the first reverse traveling wave data;

[0143] The first positive traveling wave data is the traveling wave data that passes through the first end during the process of flowing from the first end to the second end of the high-voltage direct current transmission line, and the first reverse traveling wave data is the traveling wave data that passes through the first end during the process of flowing from the second end to the first end of the high-voltage direct current transmission line.

[0144] Specifically, the data processing device can determine that the sum of the convolutions of the first line mode voltage data, the first line mode current data, and the wave impedance data is the first positive traveling wave data, and can determine that the difference between the convolutions of the first line mode voltage data, the first line mode current data, and the wave impedance data is the first reverse traveling wave data.

[0145] In this embodiment, the first forward traveling wave data and the first reverse traveling wave data can be accurately calculated based on the convolution of the first line mode voltage data, the first line mode current data, and the wave impedance data, thereby obtaining accurate traveling wave data at the first end, so that the first current value can be accurately calculated subsequently.

[0146] Based on this, in some embodiments, since the target sequence may include a first sequence and a second sequence, the Nth first value contained in the first sequence and the Nth second value contained in the second sequence are reciprocals of each other, where N is a positive integer; the traveling wave data of the state estimation point may include third forward traveling wave data and third reverse traveling wave data. Therefore, when determining the traveling wave data of the state estimation point of the high-voltage direct current transmission line based on the determined traveling wave data of the first end, the third traveling wave data can be calculated based on the fact that the first reverse traveling wave data is equal to the convolution of the third forward traveling wave data and the first sequence; and the first forward traveling wave data is equal to the convolution of the third reverse traveling wave data and the second sequence, thereby calculating the first current value.

[0147] In order to accurately calculate the second current value of the high-voltage direct current transmission line, in one embodiment, such as Figure 7 As shown, the steps mentioned above for determining the second current value of the state estimation point of a high-voltage transmission line based on the second line mode data, wave impedance data, and target sequence may specifically include the following steps:

[0148] S710 determines the traveling wave data at the second end of the high-voltage direct current transmission line based on the convolution of the second line mode voltage data, the second line mode current data, and the wave impedance data.

[0149] The data processing device can first calculate the convolution of the second-line-mode current data and the surge impedance data based on the second-line-mode current data included in the second-line-mode data. Then, based on the second-line-mode current data, it can calculate the convolution of the second-line-mode current data and the surge impedance data, as well as the second-line-mode voltage data included in the second-line-mode data, to determine the traveling wave data at the second end of the HVDC transmission line. The traveling wave data at the second end can be a wave formed at the second end of the HVDC transmission line, where the spatial distribution of the current, with a constant amplitude over time, propagates in an infinite direction.

[0150] S720 determines the traveling wave data of the state estimation point of the high-voltage direct current transmission line based on the traveling wave data of the second end and the target sequence.

[0151] In this context, the traveling wave data at the second end is equal to the convolution of the target sequence and the traveling wave data of the state estimation point.

[0152] Since the traveling wave data at the second end is equal to the convolution of the target sequence and the traveling wave data at the state estimation point, the data processing device can determine the traveling wave data at the state estimation point of the high-voltage direct current transmission line based on the determined traveling wave data at the second end and the target sequence.

[0153] S730 determines the second current value based on the traveling wave data of the state estimation point of the high-voltage direct current transmission line.

[0154] Given the traveling wave data of the state estimation point of a high-voltage direct current (HVDC) transmission line, a second current value can be determined based on this data. Since the specific formula for determining the second current value is prior art, it will not be elaborated upon here.

[0155] In this embodiment, the data processing device can determine the traveling wave data at the second end of the high-voltage direct current transmission line based on the convolution of the second line mode voltage data, the second line mode current data, and the surge impedance data. Then, based on the traveling wave data at the second end and the target sequence, it can determine the traveling wave data at the state estimation point. This allows for the determination of the second current value based on the traveling wave processing at the state estimation point. Thus, the second current value can be accurately calculated.

[0156] Since the traveling wave data at the second end may include both second forward traveling wave data and second reverse traveling wave data, in one embodiment, in order to accurately obtain the traveling wave data at the second end, the aforementioned S710 may specifically include the following steps:

[0157] The sum of the convolution of the second line mode voltage data, the second line mode current data, and the wave impedance data is determined to be the second positive traveling wave data;

[0158] The difference between the convolution of the second line mode voltage data and the second line mode current data and wave impedance data is determined as the second reverse traveling wave data;

[0159] The second positive traveling wave data is the traveling wave data that passes through the second end during the process of flowing from the first end to the second end of the high-voltage direct current transmission line, and the second negative traveling wave data is the traveling wave data that passes through the second end during the process of flowing from the second end to the first end of the high-voltage direct current transmission line.

[0160] Specifically, after acquiring the second data and the wave impedance data, the data processing device can determine that the sum of the convolution of the second line mode voltage data, the second line mode current data, and the wave impedance data is the second positive traveling wave data, and determine that the sum of the convolution of the second line mode voltage data, the second line mode current data, and the wave impedance data is the second reverse traveling wave data.

[0161] In this embodiment, the second forward traveling wave data and the second reverse traveling wave data can be accurately calculated based on the convolution of the second line mode voltage data, the second line mode current data, and the wave impedance data. This allows for the accurate calculation of the traveling wave data at the second end, which in turn enables the accurate calculation of the second current value.

[0162] Based on this, in some embodiments, the target sequence may include a first sequence and a second sequence, wherein the Nth first value contained in the first sequence and the Nth second value contained in the second sequence are reciprocals of each other, and N is a positive integer; the traveling wave data of the state estimation point may include third forward traveling wave data and third reverse traveling wave data. Therefore, when determining the traveling wave data of the state estimation point of the high-voltage direct current transmission line based on the determined traveling wave data of the second end, the third traveling wave data can be calculated based on the fact that the second reverse traveling wave data is equal to the convolution of the third forward traveling wave data and the first sequence, and that the second forward traveling wave data is equal to the convolution of the third reverse traveling wave data and the value, and then the second current value can be calculated.

[0163] To more clearly describe the data processing method provided in the embodiments of this application, the embodiments of this application provide relevant formulas involved in the data processing method improved based on the prior art. Taking the first end of a high-voltage direct current transmission line as an example, assuming x = 0 at the first end and x = 1 at the second end, where 1 is the total length of the high-voltage direct current transmission line. Specifically, it can be as follows:

[0164] Current technologies assume that the HVDC transmission lines used are lossless and that the line parameters do not change with current frequency. However, in reality, with long lines, the resistance and conductance of HVDC transmission lines cause traveling wave attenuation, and the line parameters do change with frequency. This leads to low accuracy in determining whether a fault has occurred in the HVDC transmission line using current technologies. Therefore, considering the influence of frequency-varying line parameters, the voltage and current at any point on the HVDC transmission line can be expressed in the frequency domain as follows:

[0165] U x =A1e -γx +A2e γx (19)

[0166] I x =(A1e -γx -A2e γx ) / Z c (20)

[0167] Among them, U x This represents the frequency domain form of the voltage at any point on a high-voltage direct current transmission line. Correspondingly, I... x Z represents the frequency domain form of the current at any point on the HVDC transmission line. x represents the location of that point on the HVDC transmission line. c Here are the wave impedance data, and γ is the line propagation coefficient. A1 and A2 are preset constants.

[0168] The Z mentioned above c And γ can be expressed by the following formulas (23) and (24):

[0169]

[0170]

[0171] Where Z0, Y0, R0, G0, L0, and C0 represent the impedance, admittance, resistance, conductance, inductance, and capacitance per unit length of the transmission line. ω is the imaginary unit, and ω is the angular frequency.

[0172] From the above formulas (19) and (20), it can be seen that, considering attenuation and frequency variation characteristics, the calculation formulas for the traveling wave can be as shown in formulas (25) and (26):

[0173]

[0174] U f and I f These are respectively called the forward voltage traveling wave and the forward current traveling wave, U r and Ir These are respectively called reverse voltage traveling wave and reverse current traveling wave. U is the voltage value at any point on the high voltage direct current transmission line, and I is the current value at any point on the high voltage direct current transmission line.

[0175] Substituting the two points x=0 and x=x0 of the high-voltage direct current transmission line into the above formulas (19) and (20), and eliminating A1 and A2, the relationship between the voltage and current of the high-voltage direct current transmission line in the frequency domain can be obtained as shown in formula (27):

[0176]

[0177] Where U1 and I1 represent the frequency domain voltage and current at x = 0, respectively, and U2 and I2 represent the frequency domain voltage and current at x = x0, respectively.

[0178] Since the formulas (25) and (26) for calculating the traveling wave and the formula (27) for estimating the traveling wave are expressions in the frequency domain, they cannot be directly calculated in the time domain. To facilitate implementation by the data processing device, a method for time-domain calculation is given below.

[0179] By performing an inverse Fourier transform on equation (25), we obtain equation (28) in the time domain:

[0180]

[0181] Among them, u f (t) represents a positive traveling wave, u r (t) represents the reverse traveling wave, u(t) represents the first line-mode voltage data at the first terminal, i(t) represents the line-mode current data at the first terminal, and Z... c (t) represents the relationship between Z c The time-domain form obtained after performing the inverse Fourier transform, where * denotes convolution. To obtain the Z... c (t) To analyze, first draw Z c The amplitude-frequency and phase-frequency characteristics, specifically as follows: Figure 8 As shown, based on Figure 8 The frequency response curve shown is fitted with the s-transform transfer function shown in equation (29) to obtain the expression of the s-transform transfer function of the wave impedance.

[0182]

[0183] Where n and i are both positive integers, p i Let k be the pole of the s-transform transfer function. i The coefficients of the components corresponding to each pole.

[0184] Based on this, the bilinear z-transform method is used, as shown in equation (30), to transform the fitted s-transform transfer function into the z-transform transfer function.

[0185]

[0186] Where Ts is the sampling time interval.

[0187] Calculate the unit sample response of the z-transform transfer function, and truncate the unit sample response using a window function to obtain the FIR filter corresponding to this transfer function in the time domain, denoted as Z. c (n).

[0188] The traveling wave in the time domain is calculated as shown in equation (31):

[0189]

[0190] Among them, u f (n) represents the first positive traveling wave, u r (n) represents the first reverse traveling wave, u(n) represents the first line-mode voltage data in the time domain, and i(n) represents the first line-mode current data in the time domain.

[0191] For traveling wave estimation, a similar method is used. Taking the inverse Fourier transform of equation (27) yields:

[0192]

[0193] Among them, u 1r (t) represents the first reverse traveling wave, u 2f (t) represents the third positive traveling wave, u 1f (t) represents the first positive traveling wave, u 2r (t) represents the third reverse traveling wave.

[0194] Where h(t) is the propagation coefficient The time-domain form obtained after performing the inverse Fourier transform, where g(t) is the propagation coefficient. The time-domain form obtained after performing the inverse Fourier transform. Similarly, first calculate... and The amplitude-frequency and phase-frequency characteristics are obtained by curve fitting using the s-transform transfer function shown in equation (29). and The s-transform transfer function expression is obtained. Then, using the bilinear z-transform method, as shown in equation (30), the fitted s-transform transfer function is transformed into the z-transform transfer function. The unit sample response of the z-transform transfer function is calculated, and the unit sample response is truncated using a window function to obtain the FIR filter corresponding to the transfer function in the time domain, denoted as h(n) and g(n).

[0195] The time-domain method for traveling wave estimation is shown in equation (33).

[0196]

[0197] Thus, formulas (31) and (33) can be obtained. Based on this, it should be noted that the data processing method provided in this application embodiment is based on formula (31) to calculate the traveling wave data of the first end or the second end. Then, based on formula (33), the traveling wave data of the state estimation point is calculated using the traveling wave data of the first end or the second end.

[0198] Based on the same inventive concept, embodiments of this application also provide a data processing apparatus. (Specifically combined with...) Figure 9 The data processing apparatus provided in the embodiments of this application will be described in detail.

[0199] Figure 9 This is a schematic diagram of the structure of a data processing device provided in an embodiment of this application.

[0200] like Figure 9 As shown, the data processing device 900 may include an acquisition module 910 and a determination module 920.

[0201] The acquisition module 910 is used to acquire the line transmission data, first line mode data and second line mode data of the high voltage direct current transmission line. The first line mode data is the data mode collected at the first end of the high voltage direct current transmission line and the second line mode data is the data mode collected at the second end of the high voltage direct current transmission line.

[0202] The determination module 920 is used to determine the first current value of the state estimation point of the high voltage direct current transmission line based on the line transmission data and the first line model data; and to determine the second current value of the state estimation point of the high voltage direct current transmission line based on the line transmission data and the second line model data, wherein the state estimation point is located between the first end and the second end of the high voltage direct current transmission line.

[0203] The determination module 920 is also used to determine that the high-voltage direct current transmission line is a faulty line when the difference between the first current value and the second current value is greater than a preset threshold.

[0204] In one embodiment, the acquisition module is further configured to acquire first transmission line data at the first end of the high-voltage direct current transmission line and second transmission line data at the second end of the high-voltage direct current transmission line.

[0205] The data processing device mentioned above may also include a polar mode conversion processing module.

[0206] The pole mode conversion processing module is used to perform pole mode conversion processing on the first transmission line data and the second transmission line data respectively to obtain the first line mode data corresponding to the first transmission line data and the second line mode data corresponding to the second transmission line data.

[0207] In one embodiment, the line transmission data includes wave impedance data and line propagation coefficient, wherein the wave impedance data is positively correlated with the current frequency; the data processing device mentioned above may also include a calculation module.

[0208] The calculation module is used to input the line propagation coefficient into a preset function for calculation to obtain the target sequence;

[0209] The determination module is also used to determine the first current value of the state estimation point of the high-voltage transmission line based on the first line mode data, as well as the wave impedance data and the target sequence;

[0210] The determination module is also used to determine the second current value of the state estimation point of the high-voltage transmission line based on the second line mode data, as well as the wave impedance data and the target sequence.

[0211] In one embodiment, the first line-mode data includes first line-mode current data and first line-mode voltage data; the second line-mode data includes second line-mode current data and second line-mode voltage data.

[0212] In one embodiment, the determining module is further configured to determine the traveling wave data of the first end of the high-voltage direct current transmission line based on the convolution of the first line mode voltage data, the first line mode current data, and the wave impedance data.

[0213] The determination module is also used to determine the traveling wave data of the state estimation point of the high-voltage transmission line based on the traveling wave data of the first end and the target sequence, wherein the traveling wave data of the first end is equal to the convolution of the target sequence and the traveling wave data of the state estimation point;

[0214] The determination module is also used to determine the first current value based on the traveling wave data of the state estimation point of the high-voltage direct current transmission line.

[0215] In one embodiment, the traveling wave data at the first end includes first forward traveling wave data and first reverse traveling wave data;

[0216] The determination module is also used to determine the first line mode voltage data, and the sum of the convolution of the first line mode current data and the wave impedance data is the first positive traveling wave data;

[0217] The determination module is also used to determine the first line mode voltage data, and the difference between the convolution of the first line mode current data and the wave impedance data is the first reverse traveling wave data;

[0218] The first positive traveling wave data is the traveling wave data that passes through the first end during the process of flowing from the first end to the second end of the high-voltage direct current transmission line, and the first reverse traveling wave data is the traveling wave data that passes through the first end during the process of flowing from the second end to the first end of the high-voltage direct current transmission line.

[0219] In one embodiment, the determining module is further configured to determine the traveling wave data at the second end of the high-voltage direct current transmission line based on the convolution of the second line mode voltage data, the second line mode current data, and the wave impedance data;

[0220] The determination module is also used to determine the traveling wave data of the state estimation point of the high voltage direct current transmission line based on the traveling wave data of the second end and the target sequence, wherein the traveling wave data of the second end is equal to the convolution of the target sequence and the traveling wave data of the state estimation point;

[0221] The determination module is also used to determine the second current value based on the traveling wave data of the state estimation point of the high-voltage direct current transmission line.

[0222] In one embodiment, the traveling wave data at the second end includes second forward traveling wave data and second reverse traveling wave data;

[0223] The determination module is also used to determine the second line mode voltage data, and the sum of the convolution of the second line mode current data and the wave impedance data is the second positive traveling wave data;

[0224] The determination module is also used to determine the second line mode voltage data, and the difference between the convolution of the second line mode current data and the wave impedance data is the second reverse traveling wave data;

[0225] The second positive traveling wave data is the traveling wave data that passes through the second end during the process of flowing from the first end to the second end of the high-voltage direct current transmission line, and the second negative traveling wave data is the traveling wave data that passes through the second end during the process of flowing from the second end to the first end of the high-voltage direct current transmission line.

[0226] In one embodiment, the target sequence includes a first sequence and a second sequence, wherein the Nth first value contained in the first sequence and the Nth second value contained in the second sequence are reciprocals of each other, and N is a positive integer; the traveling wave data of the state estimation point includes third forward traveling wave data and third reverse traveling wave data;

[0227] The first reverse traveling wave data is equal to the convolution of the third forward traveling wave data and the first sequence; the first forward traveling wave data is equal to the convolution of the third reverse traveling wave data and the second sequence.

[0228] The second reverse traveling wave data is equal to the convolution of the third forward traveling wave data and the first sequence; the second forward traveling wave data is equal to the convolution of the third reverse traveling wave data and the numerical value.

[0229] In this embodiment, by acquiring line transmission data, first line data, and second line data of a high-voltage direct current (HVDC) transmission line, a first current value at the state estimation point of the HVDC transmission line can be determined based on the line transmission data and the first line data. A second current value at the state estimation point can be determined based on the line transmission data and the second line mode data. If the difference between the first and second current values ​​exceeds a preset threshold, the HVDC transmission line can be identified as a faulty line. Since the state estimation point is located between the first and second ends of the HVDC transmission line, determining the current value at the state estimation point based on the first line mode data and the second line data allows for accurate fault identification of the HVDC transmission line. This enables timely disconnection of the faulty line to ensure the safe and stable operation of the power system.

[0230] The various modules in the data processing apparatus provided in the embodiments of this application can achieve... Figures 1 to 3 The method steps of any of the embodiments shown herein, and the corresponding technical effects thereof, will not be described in detail here for the sake of brevity.

[0231] Figure 10 A schematic diagram of the hardware structure of the electronic device provided in an embodiment of this application is shown.

[0232] An electronic device may include a processor 1001 and a memory 1002 storing computer program instructions.

[0233] Specifically, the processor 1001 may include a central processing unit (CPU), an application-specific integrated circuit (ASIC), or one or more integrated circuits that can be configured to implement the embodiments of this application.

[0234] Memory 1002 may include mass storage for data or instructions. For example, and not limitingly, memory 1002 may include a hard disk drive (HDD), floppy disk drive, flash memory, optical disk, magneto-optical disk, magnetic tape, or Universal Serial Bus (USB) drive, or a combination of two or more of these. Where appropriate, memory 1002 may include removable or non-removable (or fixed) media. Where appropriate, memory 1002 may be internal or external to the integrated gateway disaster recovery device. In a particular embodiment, memory 1002 is non-volatile solid-state memory.

[0235] Memory may include read-only memory (ROM), random access memory (RAM), disk storage media devices, optical storage media devices, flash memory devices, and electrical, optical, or other physical / tangible memory storage devices. Therefore, typically, memory includes one or more tangible (non-transitory) computer-readable storage media (e.g., memory devices) encoded with software including computer-executable instructions, and when the software is executed (e.g., by one or more processors), it is operable to perform the operations described with reference to the methods according to one aspect of this disclosure.

[0236] The processor 1001 implements any of the data processing methods described in the above embodiments by reading and executing computer program instructions stored in the memory 1002.

[0237] In one example, the electronic device may also include a communication interface 1003 and a bus 1010. For example, Figure 10 As shown, the processor 1001, memory 1002, and communication interface 1003 are connected through bus 1010 and complete communication with each other.

[0238] The communication interface 1003 is mainly used to realize communication between various modules, devices, units and / or equipment in the embodiments of this application.

[0239] Bus 1010 includes hardware, software, or both, that couples components of an online data traffic metering device together. For example, and not limitingly, the bus may include an Accelerated Graphics Port (AGP) or other graphics bus, an Enhanced Industry Standard Architecture (EISA) bus, a Front Side Bus (FSB), HyperTransport (HT) interconnect, an Industry Standard Architecture (ISA) bus, an Infinite Bandwidth Interconnect, a Low Pin Count (LPC) bus, a memory bus, a Microchannel Architecture (MCA) bus, a Peripheral Component Interconnect (PCI) bus, a PCI-Express (PCI-X) bus, a Serial Advanced Technology Attachment (SATA) bus, a Video Electronics Standards Association Local (VLB) bus, or other suitable buses, or combinations of two or more of these. Where appropriate, bus 1010 may include one or more buses. Although specific buses are described and illustrated in embodiments of this application, any suitable bus or interconnect is contemplated herein.

[0240] Furthermore, in conjunction with the data processing methods described in the above embodiments, this application embodiment can provide a computer storage medium for implementation. This computer storage medium stores computer program instructions; when these computer program instructions are executed by a processor, they implement the data processing method provided in this application embodiment.

[0241] This application also provides a computer program product, in which instructions are executed by the processor of an electronic device, causing the electronic device to perform the scientific and technological innovation achievement evaluation method provided in this application.

[0242] It should be clarified that this application is not limited to the specific configurations and processes described above and shown in the figures. For the sake of brevity, detailed descriptions of known methods are omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method process of this application is not limited to the specific steps described and shown. Those skilled in the art can make various changes, modifications, and additions, or change the order of steps, after understanding the spirit of this application.

[0243] The functional blocks shown in the above block diagram can be implemented as hardware, software, firmware, or a combination thereof. When implemented in hardware, they can be, for example, electronic circuits, application-specific integrated circuits (ASICs), appropriate firmware, plug-ins, function cards, etc. When implemented in software, the elements of this application are programs or code segments used to perform the required tasks. Programs or code segments can be stored on a machine-readable medium or transmitted over a transmission medium or communication link via data signals carried on a carrier wave. "Machine-readable medium" can include any medium capable of storing or transmitting information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, fiber optic media, radio frequency (RF) links, etc. Code segments can be downloaded via computer networks such as the Internet, intranets, etc.

[0244] It should also be noted that the exemplary embodiments mentioned in this application describe methods or systems based on a series of steps or apparatus. However, this application is not limited to the order of the above steps; that is, the steps can be performed in the order mentioned in the embodiments, or in a different order, or several steps can be performed simultaneously.

[0245] The aspects of this disclosure have been described above with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this disclosure. It should be understood that each block in the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, 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, or other programmable data processing apparatus to produce a machine such that these instructions, executable via the processor of the computer or other programmable data processing apparatus, enable the implementation of the functions / actions specified in one or more blocks of the flowchart illustrations and / or block diagrams. Such a processor can be, but is not limited to, a general-purpose processor, a special-purpose processor, a special application processor, or a field-programmable logic circuit. It is also understood that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can also be implemented by special-purpose hardware performing the specified functions or actions, or can be implemented by a combination of special-purpose hardware and computer instructions.

[0246] The above are merely specific embodiments of this application. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, modules, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here. It should be understood that the protection scope of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the protection scope of this application.

Claims

1. A data processing method, characterized in that, The method further includes: The transmission data, first line modulus data, and second line modulus data of the high-voltage direct current transmission line are obtained. The first line modulus data is the data modulus collected at the first end of the high-voltage direct current transmission line, and the second line modulus data is the data modulus collected at the second end of the high-voltage direct current transmission line. Based on the line transmission data and the first line model data, a first current value is determined at the state estimation point of the high-voltage direct current (HVDC) transmission line; and based on the line transmission data and the second line model data, a second current value is determined at the state estimation point of the HVDC transmission line. The state estimation point is located between the first end and the second end of the HVDC transmission line. The first current value is obtained based on the traveling wave data of the state estimation point. The traveling wave data of the first end is equal to the convolution of the target sequence and the traveling wave data of the state estimation point. The traveling wave data of the first end is a wave formed by the spatial distribution of the current at the first end moving in a certain direction with an infinite propagation direction while the amplitude remains constant over time. The second current value is obtained based on the traveling wave data of the state estimation point. The traveling wave data of the second end is equal to the convolution of the target sequence and the traveling wave data of the state estimation point. The traveling wave data of the second end is a wave formed by the spatial distribution of the current at the second end moving in a certain direction with an infinite propagation direction while the amplitude remains constant over time. The target sequence is the value calculated by inputting the line propagation data into a preset function. If the difference between the first current value and the second current value is greater than a preset threshold, the high-voltage direct current transmission line is determined to be a faulty line.

2. The method according to claim 1, characterized in that, Acquire the first line mode data and the second line mode data of the high-voltage direct current transmission line, including: Acquire first transmission line data at the first end of the high-voltage direct current transmission line, and second transmission line data at the second end of the high-voltage direct current transmission line; The first transmission line data and the second transmission line data are subjected to pole mode transformation processing respectively to obtain the first line mode data corresponding to the first transmission line data and the second line mode data corresponding to the second transmission line data.

3. The method according to claim 1, characterized in that, The line transmission data includes wave impedance data and line propagation coefficient, and the wave impedance data is positively correlated with the current frequency. The first current value of the state estimation point of the high voltage DC transmission line is determined based on the line transmission data and the first line model data. Based on the line transmission data and the second line model data, the second current value of the state estimation point of the high-voltage direct current transmission line is determined, including: The line propagation coefficient is input into a preset function for calculation to obtain the target sequence; Based on the first line model data, the wave impedance data, and the target sequence, the first current value of the state estimation point of the high voltage direct current transmission line is determined; Based on the second line model data, the wave impedance data and the target sequence, the second current value of the state estimation point of the high voltage direct current transmission line is determined.

4. The method according to any one of claims 1-3, characterized in that, The first line-mode data includes first line-mode current data and first line-mode voltage data; the second line-mode data includes second line-mode current data and second line-mode voltage data.

5. The method according to claim 4, characterized in that, Based on the first line model data, as well as the wave impedance data and the target sequence, the first current value of the state estimation point of the high-voltage direct current transmission line is determined, including: Based on the convolution of the first line mode voltage data, the first line mode current data, and the wave impedance data, the traveling wave data of the first end of the high voltage direct current transmission line is determined; Based on the traveling wave data and target sequence at the first end, the traveling wave data of the state estimation point of the high voltage direct current transmission line is determined; The first current value is determined based on the traveling wave data of the state estimation point of the high-voltage direct current transmission line.

6. The method according to claim 5, characterized in that, The traveling wave data at the first end includes first forward traveling wave data and first reverse traveling wave data; determining the traveling wave data at the first end of the high-voltage direct current transmission line based on the convolution of the first line mode voltage data, the first line mode current data, and the wave impedance data includes: The sum of the convolution of the first line mode voltage data, the first line mode current data, and the wave impedance data is determined to be the first positive traveling wave data; The difference between the convolution of the first line mode voltage data, the first line mode current data, and the wave impedance data is determined as the first reverse traveling wave data; Wherein, the first positive traveling wave data is the traveling wave data passing through the first end during the process of flowing from the first end to the second end of the high-voltage direct current transmission line, and the first reverse traveling wave data is the traveling wave data passing through the first end during the process of flowing from the second end to the first end of the high-voltage direct current transmission line.

7. The method according to claim 4, characterized in that, Based on the second line model data, and the wave impedance data and target sequence, the second current value of the state estimation point of the high-voltage direct current transmission line is determined, including: Based on the convolution of the second line mode voltage data, the second line mode current data, and the wave impedance data, the traveling wave data at the second end of the high voltage direct current transmission line is determined; Based on the traveling wave data at the second end and the target sequence, the traveling wave data of the state estimation point of the high voltage direct current transmission line is determined; The second current value is determined based on the traveling wave data of the state estimation point of the high-voltage direct current transmission line.

8. The method according to claim 7, characterized in that, The traveling wave data at the second end includes second forward traveling wave data and second reverse traveling wave data; The calculation of traveling wave data at the second end of the high-voltage direct current transmission line based on the convolution of the second line-mode voltage data, the second line-mode current data, and the wave impedance data includes: The second line mode voltage data is determined, and the sum of the convolution of the second line mode current data and the wave impedance data is the second positive traveling wave data; The difference between the convolution of the second line mode voltage data and the second line mode current data and the wave impedance data is determined as the second reverse traveling wave data; Wherein, the second positive traveling wave data is the traveling wave data passing through the second end during the process of flowing from the first end to the second end of the high-voltage direct current transmission line, and the second negative traveling wave data is the traveling wave data passing through the second end during the process of flowing from the second end to the first end of the high-voltage direct current transmission line.

9. The method according to claim 6 or 8, characterized in that, The target sequence includes a first sequence and a second sequence, wherein the Nth first value contained in the first sequence and the Nth second value contained in the second sequence are reciprocals of each other, and N is a positive integer; the traveling wave data of the state estimation point includes third forward traveling wave data and third reverse traveling wave data; The first reverse traveling wave data is equal to the convolution of the third forward traveling wave data and the first sequence; the first forward traveling wave data is equal to the convolution of the third reverse traveling wave data and the second sequence; The second reverse traveling wave data is equal to the convolution of the third forward traveling wave data and the first sequence; the second forward traveling wave data is equal to the convolution of the third reverse traveling wave data and the numerical value.

10. A data processing apparatus, characterized in that, The device comprises: The acquisition module is used to acquire line transmission data, first line modulus data and second line modulus data of the high voltage direct current transmission line. The first line modulus data is the data modulus collected at the first end of the high voltage direct current transmission line and the second line modulus data is the data modulus collected at the second end of the high voltage direct current transmission line. A determination module is used to determine a first current value at a state estimation point of the high-voltage direct current (HVDC) transmission line based on the line transmission data and the first line model data; and to determine a second current value at the state estimation point of the HVDC transmission line based on the line transmission data and the second line model data. The state estimation point is located between a first end and a second end of the HVDC transmission line. The first current value is obtained based on the traveling wave data of the state estimation point. The traveling wave data of the first end is equal to the convolution of a target sequence and the traveling wave data of the state estimation point. The traveling wave data of the first end is a wave formed by the spatial distribution of the current at the first end moving in a certain direction with an infinite propagation direction while the amplitude remains constant over time. The second current value is obtained based on the traveling wave data of the state estimation point. The traveling wave data of the second end is equal to the convolution of a target sequence and the traveling wave data of the state estimation point. The traveling wave data of the second end is a wave formed by the spatial distribution of the current at the second end moving in a certain direction with an infinite propagation direction while the amplitude remains constant over time. The target sequence is a value calculated by inputting the line propagation data into a preset function. The determining module is further configured to determine the high-voltage direct current transmission line as a faulty line when the difference between the first current value and the second current value is greater than a preset threshold.

11. An electronic device, characterized in that, The device includes: a processor and a memory storing computer program instructions; The processor reads and executes the computer program instructions to implement the data processing method as described in any one of claims 1-9.

12. A computer storage medium, characterized in that, The computer storage medium stores computer program instructions, which, when executed by a processor, implement the data processing method as described in any one of claims 1-9.

13. A computer program product, characterized in that, When the instructions in the computer program product are executed by the processor of the electronic device, the electronic device performs the data processing method as described in any one of claims 1-9.

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