Method and device for determining dielectric loss of high-voltage cable, and electronic equipment

Abstract

The invention discloses a method and a device for determining dielectric loss of a high-voltage cable, and electronic equipment, and relates to the technical field of power system analysis, and the method comprises the steps: building a preset simulation circuit model based on preset data, employing a preset interface to generate a preset target file based on the preset simulation circuit model, and transmitting the preset target file to a server. And analyzing the preset target file by adopting preset programming to obtain target data, and determining the high-voltage cable dielectric loss of the high-voltage cable line based on the target data. According to the invention, the technical problem of low efficiency of calculating the dielectric loss of the high-voltage cable in the prior art is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of power system analysis, and in particular to a method for determining a dielectric loss of a high-voltage cable, a device thereof, and electronic equipment. Background Art

[0002] Power cables are an important part of the power system. According to different insulating materials, power cables can be divided into paper insulated cables, plastic insulated cables, rubber-plastic insulated cables and gas insulated cables. After the power cable is energized, there will be a certain amount of loss in the insulating material inside, which is called dielectric loss. The existence of cable dielectric loss will cause power loss of the cable and reduce the transmission efficiency of the cable. Therefore, the reasonable calculation and accurate evaluation of dielectric loss are of great significance to the safe and stable operation of the power system.

[0003] At present, there are three main methods for calculating the dielectric loss of high-voltage cable insulation: one is the simulation method based on ATP-EMTP (Alternative Transient Program-Electromagnetic Transients Program). In the electromagnetic transient analysis program, ATP-EMTP software is widely used and can be run on most types of computers. The LCC (Line Circuit Constants) component of ATP-EMTP can be used to build a high-voltage cable main insulation dielectric loss circuit, but due to the complex circuit structure, many nodes and output parameters involved, parameter management and understanding become more difficult. In addition, the dielectric loss value of the main insulation of the high-voltage cable is generally small, and the normal value is around 0.06%. The use of the MODEL HARMONICS (a tool for analyzing and simulating harmonic problems in power systems) module to calculate the dielectric loss of the main insulation of the high-voltage cable is not only slow, but also poor in calculation accuracy, and the calculation results are almost unusable. Analysis shows that there is no problem with the output voltage and current waveforms when using ATP-EMTP for circuit simulation. The fundamental reason lies in the MODEL HARMONICS module. Therefore, it is necessary to find a method to replace the MODEL HARMONICS module. The second is the simulation method based on MATALB (Matrix laboratory). This method requires the construction of complex circuits, has slow calculation speed, poor calculation accuracy, and is inconvenient to use. The third is the method of self-programming using programming languages, such as using high-level languages ​​such as VC (Microsoft Visual C++, i.e., integrated development environment), to establish a model of the main insulation dielectric loss of high-voltage cables, and at the same time establish a set of equations to achieve the solution of voltage and current and the automatic calculation of dielectric loss. However, this method is difficult to program, and needs to be reprogrammed for different lines, and has poor versatility.

[0004] Therefore, there is an urgent need to find a convenient, fast method for simulating the main insulation dielectric loss of high-voltage cables that can meet engineering needs.

[0005] To address the above-mentioned problems, no effective solution has been proposed yet. Summary of the invention

[0006] The embodiments of the present invention provide a method for determining the dielectric loss of a high-voltage cable, a device thereof, and an electronic device, so as to at least solve the technical problem of low efficiency in calculating the dielectric loss of a high-voltage cable in the related art.

[0007] According to one aspect of an embodiment of the present invention, there is provided a method for determining the dielectric loss of a high-voltage cable, comprising: constructing a preset simulation circuit model based on preset data, wherein the preset data is parameter data of a high-voltage cable line; generating a preset target file based on the preset simulation circuit model using a preset interface; parsing the preset target file using preset programming to obtain target data, wherein the target data includes at least: a voltage waveform and a current waveform; and determining the high-voltage cable dielectric loss of the high-voltage cable line based on the target data.

[0008] Furthermore, before constructing a preset simulation circuit model based on preset data, it includes: determining the total length of the high-voltage cable line; based on the total length of the high-voltage cable line, determining the length of each interconnected small segment in the high-voltage cable line, wherein the interconnected small segment refers to a segment obtained by dividing the high-voltage cable line, and the high-voltage cable line contains a preset number of the segments.

[0009] Furthermore, before constructing a preset simulation circuit model based on preset data, it also includes: determining the arrangement and interconnection data of all the interconnected small segments on the high-voltage cable line, wherein the arrangement and the interconnection data are used to determine the topological structure of the high-voltage cable line; determining the three-phase load data and physical parameters of the high-voltage cable line; and characterizing the length of each of the interconnected small segments, the topological structure, the three-phase load data and the physical parameters as parameter data of the high-voltage cable line.

[0010] Furthermore, based on the preset simulation circuit model, a preset interface is used to generate a preset target file, comprising: based on the preset interface, determining a preset text file, wherein the preset text file is used to reflect the physical parameters and the topological structure of the high-voltage cable line; based on the preset text file, simulating the preset simulation circuit model to obtain simulation calculation results; when the simulation calculation results indicate that the simulation calculation is successful, generating the preset target file based on the preset text file.

[0011] Furthermore, based on the target data, the step of determining the high-voltage cable dielectric loss of the high-voltage cable line includes: determining the current at both ends of each interconnected small segment, and calculating the current change value based on the current at both ends of each interconnected small segment; based on the current waveform, using Fourier transform to determine the current phase of the current change value; based on the voltage waveform of each station end, using Fourier transform to determine the voltage phase of each station end voltage; based on the current phase of the current change value and the voltage phase of each station end voltage, determine the high-voltage cable dielectric loss of the high-voltage cable line.

[0012] Furthermore, the step of determining the high-voltage cable dielectric loss of the high-voltage cable line based on the current phase of the current change value and the voltage phase of each station-end voltage includes: calculating the dielectric loss angle of each interconnected small segment based on the current phase of the current change value and the voltage phase of each station-end voltage; calculating the dielectric loss of each interconnected small segment based on the dielectric loss angle; and determining the high-voltage cable dielectric loss based on the dielectric loss of each interconnected small segment.

[0013] Furthermore, after determining the high-voltage cable dielectric loss of the high-voltage cable line based on the target data, it includes: when it is necessary to change the parameter data of the high-voltage cable line, based on the target parameter, replacing the data corresponding to the target parameter in the preset programming to obtain the target parameter data of the high-voltage cable line, wherein the target parameter is the parameter that needs to be updated for the high-voltage cable line; based on the target parameter data, determining the updated high-voltage cable dielectric loss.

[0014] According to another aspect of an embodiment of the present invention, a device for determining the dielectric loss of a high-voltage cable is provided, comprising: a construction unit for constructing a preset simulation circuit model based on preset data, wherein the preset data is parameter data of a high-voltage cable line; a generation unit for generating a preset target file based on the preset simulation circuit model and using a preset interface; a parsing unit for parsing the preset target file using preset programming to obtain target data, wherein the target data includes at least: a voltage waveform and a current waveform; a determination unit for determining the high-voltage cable dielectric loss of the high-voltage cable line based on the target data.

[0015] Furthermore, the determination device includes: a first determination module, used to determine the total length of the high-voltage cable line before constructing a preset simulation circuit model based on preset data; a second determination module, used to determine the length of each interconnected small segment in the high-voltage cable line based on the total length of the high-voltage cable line, wherein the interconnected small segment refers to a segment obtained by dividing the high-voltage cable line, and the high-voltage cable line contains a preset number of the segments.

[0016] Furthermore, the determination device also includes: a third determination module, used to determine the arrangement and interconnection data of all the interconnected small segments on the high-voltage cable line before constructing a preset simulation circuit model based on preset data, wherein the arrangement and the interconnection data are used to determine the topological structure of the high-voltage cable line; a fourth determination module, used to determine the three-phase load data and physical parameters of the high-voltage cable line; a first characterization module, used to characterize the length of each of the interconnected small segments, the topological structure, the three-phase load data and the physical parameters as parameter data of the high-voltage cable line.

[0017] Furthermore, the generation unit includes: a fifth determination module, used to determine a preset text file based on the preset interface, wherein the preset text file is used to reflect the physical parameters and the topological structure of the high-voltage cable line; a first calculation module, used to perform simulation calculations on the preset simulation circuit model based on the preset text file to obtain simulation calculation results; and a first generation module, used to generate the preset target file based on the preset text file when the simulation calculation results indicate that the simulation calculation is successful.

[0018] Furthermore, the determination unit includes: a sixth determination module, used to determine the current at both ends of each interconnected small segment, and calculate the current change value based on the current at both ends of each interconnected small segment; a seventh determination module, used to determine the current phase of the current change value based on the current waveform by using Fourier transform; an eighth determination module, used to determine the voltage phase of each station-end voltage based on the voltage waveform of each station-end by using Fourier transform; a ninth determination module, used to determine the high-voltage cable dielectric loss of the high-voltage cable line based on the current phase of the current change value and the voltage phase of each station-end voltage.

[0019] Furthermore, the ninth determination module includes: a first calculation submodule, used to calculate the dielectric loss angle of each interconnected small segment based on the current phase of the current change value and the voltage phase of each station-end voltage; a second calculation submodule, used to calculate the dielectric loss of each interconnected small segment based on the dielectric loss angle; and a first determination submodule, used to determine the dielectric loss of the high-voltage cable based on the dielectric loss of each interconnected small segment.

[0020] Furthermore, the determination device also includes: a replacement module, which is used to, after determining the high-voltage cable dielectric loss of the high-voltage cable line based on the target data, replace the data corresponding to the target parameter in the preset programming based on the target parameter when it is necessary to change the parameter data of the high-voltage cable line, so as to obtain the target parameter data of the high-voltage cable line, wherein the target parameter is the parameter that needs to be updated for the high-voltage cable line; and a tenth determination module, which is used to determine the updated high-voltage cable dielectric loss based on the target parameter data.

[0021] According to another aspect of an embodiment of the present invention, a computer program product is also provided, including a non-volatile computer-readable storage medium, wherein the non-volatile computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method for determining the dielectric loss of a high-voltage cable described in any one of the above is implemented.

[0022] According to another aspect of an embodiment of the present invention, there is also provided an electronic device, comprising one or more processors and a memory, wherein the memory is used to store one or more programs, wherein when the one or more programs are executed by the one or more processors, the one or more processors implement any one of the above-mentioned methods for determining the dielectric loss of a high-voltage cable.

[0023] In the present invention, based on preset data, a preset simulation circuit model is constructed, based on the preset simulation circuit model, a preset interface is used to generate a preset target file, the preset target file is parsed using preset programming to obtain target data, and based on the target data, the high-voltage cable dielectric loss of the high-voltage cable line is determined, thereby solving the technical problem of low efficiency in calculating the high-voltage cable dielectric loss in the related art.

[0024] In the present invention, a preset simulation circuit model can be constructed by utilizing preset data. According to the preset simulation circuit model, a preset interface can be used to generate a preset target file. Thereafter, the preset target file can be parsed using preset programming to obtain target data. According to the target data, the dielectric loss of the high-voltage cable can be determined. Through batch processing operations, the calculation of the dielectric loss of multiple cable segments can be completed, thereby realizing the fast and accurate calculation of the dielectric loss of complex multi-loop cable lines (i.e., there are multiple independent cable loops in a common path), thereby achieving the technical effect of improving the efficiency of calculating the dielectric loss of the high-voltage cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0026] Figure 1 is a flow chart of an optional method for determining dielectric loss of a high voltage cable according to an embodiment of the present invention;

[0027] Figure 2 is a schematic diagram of an optional three-phase high-voltage cable cross-interconnection model according to an embodiment of the present invention;

[0028] Figure 3 is a flow chart for optionally determining the dielectric loss of a high voltage cable according to an embodiment of the present invention;

[0029] Figure 4 is a schematic diagram of an optional device for determining dielectric loss of a high-voltage cable according to an embodiment of the present invention;

[0030] Figure 5 The present invention is a hardware structure block diagram of an electronic device (or mobile device) for determining a method for high-voltage cable dielectric loss according to an embodiment of the present invention. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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 should fall within the scope of protection of the present invention.

[0032] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0033] It should be noted that the relevant information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data for analysis, stored data, displayed data, etc.) collected and involved in the present invention are all information and data authorized by the user or fully authorized by all parties, and the collection, storage, use, processing, transmission, provision, disclosure and application of relevant data are in compliance with the relevant laws, regulations and standards of the relevant regions, necessary confidentiality measures are taken, and public order and good customs are not violated, and corresponding operation entrances are provided for users to choose to authorize or refuse. For example, an interface is set between the system and the relevant users or organizations. Before obtaining relevant information, it is necessary to send an acquisition request to the aforementioned user or organization through the interface, and obtain relevant information after receiving the consent information fed back by the aforementioned user or organization.

[0034] In the present invention, by utilizing the rich component types of ATP-EMTP, a high-voltage cable simulation circuit model can be built. At the same time, by utilizing the PL4 (ATP-EMTP Plot File, i.e., a data file related to ATP-EMTP) output file of ATP-EMTP, automatic separation of variables (such as current waveform and voltage waveform) can be achieved to avoid variable confusion. In addition, the dielectric loss under different operating conditions can be determined by changing the three-phase load current and power factor, which can avoid building the high-voltage cable simulation circuit model multiple times and can efficiently and accurately determine the high-voltage cable dielectric loss of the high-voltage cable line.

[0035] The present invention is described in detail below in conjunction with various embodiments.

[0036] Embodiment 1

[0037] According to an embodiment of the present invention, an embodiment of a method for determining the dielectric loss of a high-voltage cable is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0038] Figure 1 is a flow chart of an optional method for determining the dielectric loss of a high-voltage cable according to an embodiment of the present invention, such as Figure 1 As shown, the method comprises the following steps:

[0039] Step S101, constructing a preset simulation circuit model based on preset data, wherein the preset data is parameter data of a high-voltage cable line.

[0040] Optionally, since the total length of each high-voltage cable line, the length of each interconnected small segment, the physical parameters of the cable itself, the cross-interconnection method adopted by each interconnected segment, and the size of the three-phase load are not the same, when building a simulation circuit model, a simulation circuit model can be built according to the actual situation of each high-voltage cable line.

[0041] In this embodiment, a preset simulation circuit model (such as a three-phase high-voltage cable simulation model) can be built based on preset data (i.e., parameter data of the high-voltage cable line, such as the total length of the high-voltage cable line, the length of the interconnected small segments, the physical parameters of the cable, the arrangement method, the interconnection conditions, the three-phase load condition data, etc.).

[0042] In this embodiment, ATP-EMTP is a general electromagnetic transient simulation software, and a discrete component library provided by ATP-EMTP can be used to build a preset simulation circuit model according to the actual situation of each high-voltage cable line.

[0043] Figure 2 is a schematic diagram of an optional three-phase high-voltage cable cross-connection model according to an embodiment of the present invention, such as Figure 2 As shown, the three-phase (such as A, B, C three-phase) high-voltage cable cross-interconnection model includes nine interconnected small sections A1, B1, C1, A2, B2, C2, A3, B3, C3, a left grounding box GL, a right grounding box GR, and cross-interconnection boxes JA1 and JA2.

[0044] In this embodiment, the three-phase high-voltage cable simulation model may include a voltage source, a resistor, a measuring element, an equivalent circuit specific to the site conditions, an LCC element, and a grounding point. The equivalent circuit specific to the site conditions can be expressed as a cable line from the front of the high-voltage cable cross-connected section to the voltage source, which can be described by multi-segment cable LCC elements. According to the specific structure of the actual cable line, the small sections of cable can be interconnected to construct a schematic diagram of the three-phase high-voltage cable simulation principle.

[0045] Step S102, based on a preset simulation circuit model, using a preset interface, generating a preset target file.

[0046] In this embodiment, the preset target file (such as PL4 file) is the voltage and current output file of the preset simulation circuit model. The corresponding preset target file can be automatically generated according to the preset simulation circuit model using a preset interface (such as AtpDraw.exe, i.e., a user graphic input interface).

[0047] In this embodiment, after the preset target file is obtained, a BAT (Batch File, ie, batch processing file) file may be used to automatically execute subsequent operations.

[0048] Step S103, using preset programming to parse the preset target file to obtain target data, wherein the target data at least includes: a voltage waveform and a current waveform.

[0049] It should be noted that the preset target file is a binary file with a specific format and cannot be read or written directly. The professional software provided by ATP-EMTP is required to view the voltage and current waveforms.

[0050] In this embodiment, a preset programming (such as VC programming) may be used to parse a preset target file to obtain target data (such as a voltage waveform, a current waveform, etc.).

[0051] Step S104: determining the high-voltage cable dielectric loss of the high-voltage cable line based on the target data.

[0052] Optionally, the target data obtained by analysis can be used to calculate the phase of voltage and current. Based on the calculated phase of voltage and current, the dielectric loss of each interconnected small segment can be calculated, thereby determining the high-voltage cable dielectric loss of the high-voltage cable line.

[0053] In summary, by using preset data, constructing a preset simulation circuit model, and based on the preset simulation circuit model, using a preset interface to generate a preset target file, and then using preset programming to parse the preset target file, the target data can be obtained. Thereafter, based on the target data, the high-voltage cable dielectric loss of the high-voltage cable line can be determined, and the calculation of the dielectric loss of complex multi-circuit cable lines is realized, thereby solving the technical problem of low efficiency in calculating the dielectric loss of high-voltage cables in related technologies.

[0054] In order to construct a preset simulation circuit model, the parameter data of the high-voltage cable line is first determined. In the method for determining the high-voltage cable dielectric loss provided in Example 1 of the present application, the total length of the high-voltage cable line is determined; based on the total length of the high-voltage cable line, the length of each interconnected small segment in the high-voltage cable line is determined, wherein the interconnected small segment refers to a segment obtained by dividing the high-voltage cable line, and the high-voltage cable line contains a preset number of segments.

[0055] Optionally, when building a preset simulation circuit model, the simulation model may be built according to the actual conditions of each high-voltage cable line. For a given cable line, the parameter data of each high-voltage cable line is unique.

[0056] In this embodiment, the total length of the high-voltage cable line can be determined, and the length of each interconnected small segment in the high-voltage cable line can be obtained based on the total length of the high-voltage cable line. For example, the total length of the high-voltage cable line is 10 kilometers, and there is a cross-connection joint every 2 kilometers. The high-voltage cable line can be divided into 5 interconnected small segments, and the length of each small segment is 2 kilometers.

[0057] In order to accurately determine the parameter data of the high-voltage cable line, in the method for determining the high-voltage cable dielectric loss provided in Example 1 of the present application, the arrangement and interconnection data of all interconnected small segments on the high-voltage cable line are determined, wherein the arrangement and interconnection data are used to determine the topological structure of the high-voltage cable line; the three-phase load data and physical parameters of the high-voltage cable line are determined; and the length, topological structure, three-phase load data and physical parameters of each interconnected small segment are characterized as parameter data of the high-voltage cable line.

[0058] Optionally, the arrangement method reflects the connection order and method between the interconnected small segments on the cable line, for example, a straight line arrangement, a ring arrangement, a star arrangement, etc. The interconnection data involves the electrical connection details between the interconnected small segments, including the location of the interconnection joints, the interconnection method (such as direct connection, cross interconnection, etc.), the arrangement method and the interconnection data can be used to determine the topology of the high-voltage cable line, the three-phase load data includes the three-phase load current and power factor at the end or midpoint of the line, and the physical parameters are the electrical parameters of the cable itself, including conductor resistance, inductance, capacitance, etc.

[0059] In this embodiment, the length, topology, three-phase load data and physical parameters of each interconnected small segment may be represented as parameter data of the high-voltage cable line.

[0060] In order to accurately generate a preset target file, in the method for determining the dielectric loss of a high-voltage cable provided in Example 1 of the present application, a preset text file is determined based on a preset interface, wherein the preset text file is used to reflect the physical parameters and topological structure of the high-voltage cable line; based on the preset text file, a preset simulation circuit model is simulated and calculated to obtain a simulation calculation result; when the simulation calculation result indicates that the simulation calculation is successful, a preset target file is generated based on the preset text file.

[0061] Optionally, a preset text file (such as an ATP file (i.e., a data file related to the ATP simulation software, which may contain information such as circuit models and parameter settings)) can be directly read and written, reflecting the physical parameters and topological relationships of a specific circuit. Each line has a specific meaning, and the unique topological structure of the circuit can be parsed based on the content of the preset text file.

[0062] In this embodiment, a preset text file can be determined according to a preset interface. Based on the determined preset text file, a preset simulation circuit model can be simulated and calculated. When there are no errors in the preset simulation circuit model, a successful simulation calculation result can be obtained. Based on the preset text file, a preset target file can be generated.

[0063] In some optional embodiments, error information may be prompted when running the simulation, such as topology error, parameter data range error, etc., and the preset simulation circuit model may be corrected based on the error information.

[0064] In order to accurately determine the high-voltage cable dielectric loss of a high-voltage cable line, in the method for determining the high-voltage cable dielectric loss provided in Example 1 of the present application, the currents at both ends of each interconnected small segment are determined, and based on the currents at both ends of each interconnected small segment, the current change value is calculated; based on the current waveform, Fourier transform is used to determine the current phase of the current change value; based on the voltage waveform of each station end, Fourier transform is used to determine the voltage phase of each station end voltage; based on the current phase of the current change value and the voltage phase of each station end voltage, the high-voltage cable dielectric loss of the high-voltage cable line is determined.

[0065] Optionally, in Figure 2 In the three-phase high-voltage cable cross-connection model shown in the figure, the preset target file contains three station-end voltage waveforms (i.e., three phase voltages, such as UA, UB, UC) and 18 current waveforms. The 18 current waveforms include the ABC three-phase currents (such as IA1L, IB1L, IC1L) at the left end of the first small interconnection segment (i.e., the left end of A1, B1, C1), the ABC three-phase currents (such as IA1L, IB1L, IC1L) at the joint of the first and second segments (i.e., the right end of A1, B1, C1 and the left end of A2, B2, C2). Current (such as IA1R, IB1R, IC1R, IA2L, IB2L, IC2L), current at the joint of the second and third sections (i.e. the right end of A2, B2, C2 and the left end of A3, B3, C3) (such as IA2R, IB2R, IC2R, IA3L, IB3L, IC3L), ABC three-phase current (such as IA3R, IB3R, IC3R) at the right end of the third small interconnected section (i.e. the right end of A3, B3, C3).

[0066] In this embodiment, a measuring device (such as an ammeter or a voltmeter) can be used to measure the current and voltage. According to the measured current at both ends of each interconnected segment, the current change value can be calculated. For example, the current change value (i.e., the leakage current, such as ):

[0067]

[0068] in, represents the current at the right end of the first interconnected segment, I A1L Represents the current at the left end of the first interconnected segment.

[0069] In this embodiment, the current phase of the current change value can be determined based on the current waveform in the target data by using Fourier transform, and the voltage phase of each station end voltage (i.e., the voltage at the substation or distribution station where the cable is connected) can be determined by using Fourier transform. Based on the current phase of the current change value and the voltage phase of each station end voltage, the high-voltage cable dielectric loss of the high-voltage cable line can be determined.

[0070] In order to improve the accuracy of determining the dielectric loss of the high-voltage cable, the dielectric loss of each interconnected small segment is first calculated. In the method for determining the dielectric loss of the high-voltage cable provided in Example 1 of the present application, the dielectric loss angle of each interconnected small segment is calculated based on the current phase of the current change value and the voltage phase of each station-end voltage; based on the dielectric loss angle, the dielectric loss of each interconnected small segment is calculated; based on the dielectric loss of each interconnected small segment, the dielectric loss of the high-voltage cable is determined.

[0071] Optionally, the dielectric loss angle of each interconnected segment can be calculated based on the current phase of the current change value and the voltage phase of each station-end voltage. For example, the dielectric loss angle of the first interconnected segment (such as δ A1 ):

[0072]

[0073] Among them, φ I_A1 Indicates the leakage current of the first interconnected segment The current phase, φ U_A1 Indicates the phase of phase A voltage.

[0074] In this embodiment, the dielectric loss of each interconnected segment can be calculated according to the dielectric loss angle. For example, according to the dielectric loss angle of the first interconnected segment (such as δ A1 ), calculate the dielectric loss of the first interconnection segment (such as tanδ A1 ):

[0075]

[0076] In this embodiment, the calculated dielectric loss of each interconnected small segment is added together to obtain the dielectric loss of the high-voltage cable.

[0077] In order to determine the dielectric loss of the high-voltage cable under different parameters, in the method for determining the dielectric loss of the high-voltage cable provided in Example 1 of the present application, when it is necessary to change the parameter data of the high-voltage cable line, based on the target parameter, the data corresponding to the target parameter is replaced in the preset programming to obtain the target parameter data of the high-voltage cable line, wherein the target parameter is the parameter that needs to be updated for the high-voltage cable line; based on the target parameter data, the updated dielectric loss of the high-voltage cable is determined.

[0078] Optionally, in the ATP-EMTP simulation, when the parameter data of the high-voltage cable line needs to be changed, manual adjustment can be performed in the parameter setting page provided by the preset interface.

[0079] In this embodiment, when it is necessary to change the parameter data of the high-voltage cable line (such as the total length of the high-voltage cable line, the length of the interconnected small segments, etc.), the data corresponding to the target parameters can be replaced in the preset programming according to the target parameters (that is, the relevant data is replaced in the VC programming). Based on the target parameter data of the high-voltage cable line obtained after the replacement, the dielectric loss of each interconnected small segment under the parameter data can be calculated, so that the dielectric loss of the high-voltage cable under different parameter data can be determined.

[0080] In this embodiment, when it is necessary to change the three-phase load current and power factor (i.e., change the electrical characteristics of the load connected to the end of the cable line), the relevant data in the VC programming can be automatically replaced through the BAT file, and simulation analysis under different load conditions can be quickly performed without rebuilding the preset simulation circuit model. The high-voltage cable dielectric loss under different operating conditions (such as different environmental factors, different load conditions) can be determined.

[0081] Figure 3 is a flow chart for optionally determining the dielectric loss of a high voltage cable according to an embodiment of the present invention. Figure 3 As shown, first, the ATP-EMTP model can be built, and a PL4 file can be generated by running the model. Then, the voltage waveform and current waveform can be read from the PL4 file using preset programming. According to the read voltage waveform and current waveform, the dielectric loss of each interconnected small segment can be calculated. After that, the dielectric loss of each interconnected small segment can be added together to obtain the dielectric loss of the high-voltage cable.

[0082] In an optional embodiment, the following may be used: Figure 3 The process shown implements a method for determining the dielectric loss of a high voltage cable.

[0083] In an embodiment of the present invention, by utilizing the rich component types of ATP-EMTP, a preset simulation circuit model can be built, and the PL4 output file of the preset simulation circuit model can be parsed using preset programming, and the voltage and current waveforms in the simulation circuit can be automatically read. When it is necessary to change the parameter data of the high-voltage cable line, the data corresponding to the target parameter can be replaced in the preset programming to realize the calculation of the high-voltage cable dielectric loss under different parameters, and by utilizing batch files, efficient calculation efficiency can be achieved, thereby solving the technical problem of low efficiency in calculating the high-voltage cable dielectric loss in the related art.

[0084] The following is a detailed description in conjunction with another embodiment.

[0085] Embodiment 2

[0086] A device for determining the dielectric loss of a high-voltage cable provided in this embodiment includes a plurality of implementation units, each of which corresponds to each implementation step in the above-mentioned embodiment 1.

[0087] Figure 4 is a schematic diagram of an optional device for determining the dielectric loss of a high-voltage cable according to an embodiment of the present invention, such as Figure 4 As shown, the device for determining the dielectric loss of a high-voltage cable may include: a construction unit 40 , a generation unit 41 , an analysis unit 42 , and a determination unit 43 .

[0088] The construction unit 40 is used to construct a preset simulation circuit model based on preset data, wherein the preset data is parameter data of the high-voltage cable line;

[0089] A generating unit 41 is used to generate a preset target file based on a preset simulation circuit model and using a preset interface;

[0090] The parsing unit 42 is used to parse the preset target file using preset programming to obtain target data, wherein the target data at least includes: a voltage waveform and a current waveform;

[0091] The determination unit 43 is used to determine the high-voltage cable dielectric loss of the high-voltage cable line based on the target data.

[0092] The above-mentioned device for determining the dielectric loss of the high-voltage cable can construct a preset simulation circuit model based on preset data through the construction unit 40, generate a preset target file based on the preset simulation circuit model and using a preset interface through the generation unit 41, parse the preset target file using preset programming through the parsing unit 42 to obtain target data, and determine the high-voltage cable dielectric loss of the high-voltage cable line based on the target data through the determination unit 43.

[0093] Optionally, the determination device includes: a first determination module, which is used to determine the total length of the high-voltage cable line before constructing a preset simulation circuit model based on preset data; a second determination module, which is used to determine the length of each interconnected small segment in the high-voltage cable line based on the total length of the high-voltage cable line, wherein the interconnected small segment refers to a segment obtained by dividing the high-voltage cable line, and the high-voltage cable line includes a preset number of segments. In an embodiment of the present invention, a preset simulation circuit model can be constructed by using preset data and the rich component types of ATP-EMTP. According to the preset simulation circuit model, a preset interface can be used to generate a preset target file, and then the preset target file can be parsed using preset programming to obtain target data. According to the target data, the high-voltage cable dielectric loss can be determined, thereby solving the technical problem of low efficiency in calculating the high-voltage cable dielectric loss in the related art, thereby achieving the technical effect of improving the efficiency of calculating the high-voltage cable dielectric loss.

[0094] Optionally, the determination device also includes: a third determination module, used to determine the arrangement and interconnection data of all interconnected small segments on the high-voltage cable line before constructing a preset simulation circuit model based on preset data, wherein the arrangement and interconnection data are used to determine the topological structure of the high-voltage cable line; a fourth determination module, used to determine the three-phase load data and physical parameters of the high-voltage cable line; a first characterization module, used to characterize the length, topological structure, three-phase load data and physical parameters of each interconnected small segment as parameter data of the high-voltage cable line.

[0095] Optionally, the generation unit includes: a fifth determination module, used to determine a preset text file based on a preset interface, wherein the preset text file is used to reflect the physical parameters and topological structure of the high-voltage cable line; a first calculation module, used to perform simulation calculations on a preset simulation circuit model based on the preset text file to obtain simulation calculation results; and a first generation module, used to generate a preset target file based on the preset text file when the simulation calculation results indicate that the simulation calculation is successful.

[0096] Optionally, the determination unit includes: a sixth determination module, used to determine the current at both ends of each interconnected small segment, and calculate the current change value based on the current at both ends of each interconnected small segment; a seventh determination module, used to determine the current phase of the current change value based on the current waveform by Fourier transform; an eighth determination module, used to determine the voltage phase of each station end voltage based on the voltage waveform of each station end by Fourier transform; a ninth determination module, used to determine the high-voltage cable dielectric loss of the high-voltage cable line based on the current phase of the current change value and the voltage phase of each station end voltage.

[0097] Optionally, the ninth determination module includes: a first calculation submodule, used to calculate the dielectric loss angle of each interconnected subsection based on the current phase of the current change value and the voltage phase of each station-end voltage; a second calculation submodule, used to calculate the dielectric loss of each interconnected subsection based on the dielectric loss angle; the first determination submodule, used to determine the high-voltage cable dielectric loss based on the dielectric loss of each interconnected subsection.

[0098] Optionally, the determination device also includes: a replacement module, which is used to, after determining the high-voltage cable dielectric loss of the high-voltage cable line based on the target data, replace the data corresponding to the target parameter in the preset programming based on the target parameter when it is necessary to change the parameter data of the high-voltage cable line, so as to obtain the target parameter data of the high-voltage cable line, wherein the target parameter is the parameter that needs to be updated for the high-voltage cable line; and a tenth determination module, which is used to determine the updated high-voltage cable dielectric loss based on the target parameter data.

[0099] The above-mentioned device for determining the dielectric loss of a high-voltage cable may also include a processor and a memory. The above-mentioned construction unit 40, generation unit 41, analysis unit 42, determination unit 43, etc. are all stored in the memory as program units, and the processor executes the above-mentioned program units stored in the memory to realize corresponding functions.

[0100] The processor includes a kernel, and the kernel retrieves the corresponding program unit from the memory. One or more kernels can be set, and the high-voltage cable dielectric loss of the high-voltage cable line can be determined based on the target data by adjusting the kernel parameters.

[0101] The above-mentioned memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM, and the memory includes at least one storage chip.

[0102] According to another aspect of an embodiment of the present invention, a computer program product is also provided, including a non-volatile computer-readable storage medium, the non-volatile computer-readable storage medium storing a computer program, and when the computer program is executed by a processor, any one of the above-mentioned methods for determining the dielectric loss of a high-voltage cable is implemented.

[0103] When the computer program product is executed on a data processing device, it is suitable for executing an initialization program having the following method steps: based on preset data, constructing a preset simulation circuit model; based on the preset simulation circuit model, using a preset interface to generate a preset target file; using preset programming to parse the preset target file to obtain target data; based on the target data, determining the high-voltage cable dielectric loss of the high-voltage cable line.

[0104] According to another aspect of an embodiment of the present invention, there is also provided an electronic device, comprising one or more processors and a memory, wherein the memory is used to store one or more programs, wherein when the one or more programs are executed by one or more processors, the one or more processors implement the above-mentioned method for determining the dielectric loss of a high-voltage cable.

[0105] Figure 5 1 is a hardware structure block diagram of an electronic device (or mobile device) for determining a method for high voltage cable dielectric loss according to an embodiment of the present invention. Figure 5 As shown, the electronic device may include one or more processors (e.g., Figure 5 The processor 502a, processor 502b, ..., processor 502n, etc., which may include but are not limited to a processing device such as a microprocessor MCU or a programmable logic device FPGA, etc.), a memory 504 for storing data. In addition, it may also include: a display, an input / output interface (I / O interface), a universal serial bus (USB) port (which may be included as one of the ports of the I / O interface), a network interface, a keyboard, a power supply and / or a camera. It can be understood by those skilled in the art that Figure 5 The structure shown is only for illustration and does not limit the structure of the above electronic device. Figure 5 More or fewer components as shown, or with Figure 5 Different configurations are shown.

[0106] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0107] The embodiments or examples of the present disclosure are not exhaustive, but are only illustrative of some embodiments or examples, and are not intended to be specific limitations on the scope of protection of the present disclosure. In the absence of contradiction, each step in a certain embodiment or example can be implemented as an independent example, and the steps can be combined arbitrarily. For example, the scheme after removing some steps in a certain embodiment or example can also be implemented as an independent example, and the order of the steps in a certain embodiment or example can be arbitrarily exchanged. In addition, the optional methods or optional examples in a certain embodiment or example can be combined arbitrarily; in addition, the various embodiments or examples can be combined arbitrarily, for example, some or all steps of different embodiments or examples can be combined arbitrarily, and a certain embodiment or example can be combined arbitrarily with the optional methods or optional examples of other embodiments or examples.

[0108] In the above embodiments of the present invention, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0109] In the several embodiments provided by the present invention, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0110] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0111] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0112] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk and other media that can store program codes.

[0113] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for determining the dielectric loss of a high voltage cable, characterized in that: include: Based on the preset data, a preset simulation circuit model is constructed, wherein the preset data is parameter data of the high-voltage cable line; Based on the preset simulation circuit model, a preset target file is generated using a preset interface; The preset target file is parsed by using preset programming to obtain target data, wherein the target data at least includes: a voltage waveform and a current waveform; Based on the target data, a high-voltage cable dielectric loss of the high-voltage cable line is determined.

2. The method for determining the dielectric loss of a high-voltage cable according to claim 1, characterized in that: Before building a preset simulation circuit model based on preset data, including: Determining the total length of the high voltage cable line; Based on the total length of the high-voltage cable line, the length of each interconnected small segment in the high-voltage cable line is determined, wherein the interconnected small segment refers to a segment obtained by dividing the high-voltage cable line, and the high-voltage cable line contains a preset number of the segments.

3. The method for determining the dielectric loss of a high-voltage cable according to claim 2, characterized in that: Before building a preset simulation circuit model based on preset data, it also includes: Determining the arrangement and interconnection data of all the interconnected small segments on the high-voltage cable line, wherein the arrangement and the interconnection data are used to determine the topological structure of the high-voltage cable line; Determining three-phase load data and physical parameters of the high-voltage cable line; The length of each of the interconnected small sections, the topological structure, the three-phase load data and the physical parameters are characterized as parameter data of the high-voltage cable line.

4. The method for determining the dielectric loss of a high-voltage cable according to claim 3, characterized in that: The step of generating a preset target file based on the preset simulation circuit model and using a preset interface includes: Based on the preset interface, determining a preset text file, wherein the preset text file is used to reflect the physical parameters and the topological structure of the high-voltage cable line; Based on the preset text file, a simulation calculation is performed on the preset simulation circuit model to obtain a simulation calculation result; When the simulation calculation result indicates that the simulation calculation is successful, the preset target file is generated based on the preset text file.

5. The method for determining the dielectric loss of a high-voltage cable according to claim 1, characterized in that: The step of determining the high-voltage cable dielectric loss of the high-voltage cable line based on the target data comprises: Determine the current at both ends of each interconnected small segment, and calculate the current change value based on the current at both ends of each interconnected small segment; Based on the current waveform, using Fourier transform to determine the current phase of the current change value; Based on the voltage waveform of each station end, using the Fourier transform, determine the voltage phase of each station end voltage; The high-voltage cable dielectric loss of the high-voltage cable line is determined based on the current phase of the current change value and the voltage phase of each station-end voltage.

6. The method for determining the dielectric loss of a high-voltage cable according to claim 5, characterized in that: The step of determining the high-voltage cable dielectric loss of the high-voltage cable line based on the current phase of the current change value and the voltage phase of each station-end voltage comprises: Calculating the dielectric loss angle of each interconnected small segment based on the current phase of the current change value and the voltage phase of each station-end voltage; Based on the dielectric loss angle, calculating the dielectric loss of each interconnected small segment; The dielectric loss of the high-voltage cable is determined based on the dielectric loss of each interconnected small section.

7. The method for determining the dielectric loss of a high-voltage cable according to claim 1, characterized in that: After determining the high-voltage cable dielectric loss of the high-voltage cable line based on the target data, the method further comprises: In the case where the parameter data of the high-voltage cable line needs to be changed, based on the target parameter, the data corresponding to the target parameter is replaced in the preset programming to obtain the target parameter data of the high-voltage cable line, wherein the target parameter is the parameter that needs to be updated for the high-voltage cable line; Based on the target parameter data, an updated dielectric loss of the high voltage cable is determined.

8. A device for determining dielectric loss of a high voltage cable, characterized in that: include: A construction unit, configured to construct a preset simulation circuit model based on preset data, wherein the preset data is parameter data of a high-voltage cable line; A generating unit, configured to generate a preset target file based on the preset simulation circuit model and using a preset interface; A parsing unit, used to parse the preset target file using preset programming to obtain target data, wherein the target data at least includes: a voltage waveform and a current waveform; A determination unit is used to determine the high-voltage cable dielectric loss of the high-voltage cable line based on the target data.

9. A computer program product, characterized in that The invention comprises a non-volatile computer-readable storage medium storing a computer program, wherein the computer program, when executed by a processor, implements the method for determining the dielectric loss of a high-voltage cable according to any one of claims 1 to 7.

10. An electronic device, characterized in that: It comprises one or more processors and a memory, wherein the memory is used to store one or more programs, wherein when the one or more programs are executed by the one or more processors, the one or more processors implement the method for determining the dielectric loss of a high-voltage cable as described in any one of claims 1 to 7.

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