CN111581864B - Method and device for separating losses of saturation reactor for converter valve - Google Patents
Method and device for separating losses of saturation reactor for converter valve Download PDFInfo
- Publication number
- CN111581864B CN111581864B CN202010367886.9A CN202010367886A CN111581864B CN 111581864 B CN111581864 B CN 111581864B CN 202010367886 A CN202010367886 A CN 202010367886A CN 111581864 B CN111581864 B CN 111581864B
- Authority
- CN
- China
- Prior art keywords
- loss
- converter valve
- coil
- core
- iron core
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
- G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Computer Hardware Design (AREA)
- Evolutionary Computation (AREA)
- Geometry (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Measuring Magnetic Variables (AREA)
Abstract
The invention provides a method and a device for separating the loss of a saturation resistor for a converter valve, wherein the method comprises the following steps: acquiring a magnetic flux density waveform of any iron core in a preset time period; establishing an iron core loss test model, wherein the iron core loss test model comprises a single iron core, an exciting coil and a measuring coil; calculating excitation voltage of the exciting coil in a preset time period according to the magnetic flux density waveform, the effective cross section area of the iron core and the number of turns of the exciting coil; applying excitation voltage to the exciting coil to obtain current of the exciting coil and voltage of the measuring coil; measuring the loss of the single iron core by the current of the exciting coil and the voltage of the measuring coil; calculating total core loss by using the loss of a single core and the number of cores in a saturation reactor for a converter valve; acquiring a total loss measured value of a saturation reactor for a converter valve under a pulse synthesis working condition; the coil loss of the saturable reactor for the converter valve is obtained from the difference between the total loss measurement value and the total core loss.
Description
Technical Field
The invention relates to the field of power electronics and power systems, in particular to a method and a device for separating the loss of a saturation reactor for a converter valve.
Background
The converter valve is a key device for extra-high voltage direct current transmission, the saturation reactor is a core device for protecting the switching on and switching off of a thyristor in the converter valve, and the safety operation of the saturation reactor directly influences the safety and reliability of the extra-high voltage direct current transmission, so that the reliability of the saturation reactor for the converter valve is required to be subjected to test evaluation. The loss is a key index for measuring the design rationality and the operation reliability of the saturation reactor for the converter valve. The losses comprise core loss and spiral coil loss, and the prior test technology can accurately measure the total loss of the core loss and the spiral coil loss, but the core loss cannot be measured independently, so that the improvement of the design of the saturable reactor core for the converter valve is not facilitated.
Disclosure of Invention
Therefore, the invention aims to overcome the defect that the core loss cannot be measured independently in the prior art, and further provides a method and a device for separating the losses of the saturable reactor for the converter valve.
The invention provides a method for separating losses of a saturation resistor for a converter valve, wherein the saturation resistor for the converter valve comprises a plurality of iron cores; the method for separating the losses of the saturation resistor for the converter valve comprises the following steps: acquiring a magnetic flux density waveform of any iron core in a preset time period; establishing an iron core loss test model, wherein the iron core loss test model comprises a single iron core, an exciting coil and a measuring coil; calculating excitation voltage of the exciting coil in a preset time period according to the magnetic flux density waveform, the effective cross section area of the iron core and the number of turns of the exciting coil; applying excitation voltage to the exciting coil to obtain current of the exciting coil and voltage of the measuring coil; measuring the loss of the single iron core by the current of the exciting coil and the voltage of the measuring coil; calculating the total core loss of the saturation resistor for the converter valve by using the loss of the single core and the number of the cores in the saturation resistor for the converter valve; acquiring a total loss measured value of a saturation reactor for a converter valve under a pulse synthesis working condition; the coil loss of the saturable reactor for the converter valve is obtained from the difference between the total loss measurement value and the total core loss.
Optionally, the step of acquiring the magnetic flux density waveform of any one of the cores in a preset time period includes: establishing a finite element magnetic field analysis model of a saturation reactor for a converter valve, wherein the finite element magnetic field analysis model comprises a spiral coil finite element model and an iron core finite element model; applying a pulse synthesis voltage to the helical coil finite element model; and obtaining the magnetic flux density waveform of the iron core in a preset time period through finite element calculation.
Optionally, obtaining the magnetic flux density waveform of the core in a preset time period through finite element calculation includes: and calculating the magnetic field of the saturation reactor for the converter valve by using a transient finite element analysis method, and obtaining the magnetic flux density of the iron core at any moment in a preset time period to form a magnetic flux density waveform.
Optionally, in the method for separating the losses of the saturable reactor for the converter valve provided by the invention, the excitation voltage is calculated by the following formula:
where N represents the number of turns of the exciting coil, S represents the effective cross-sectional area of the core, and B (t) represents the magnetic flux density waveform.
Optionally, in the method for separating the losses of the saturable reactor for the converter valve provided by the invention, a finite element magnetic field analysis model of the saturable reactor for the converter valve is built, and the method comprises the following steps: and respectively modeling an iron core and a spiral coil of the saturation reactor for the converter valve according to the structure of the saturation reactor for the converter valve to obtain a finite element magnetic field analysis model.
Optionally, in the method for separating the losses of the saturable reactor for the converter valve provided by the invention, the number of turns of the exciting coil and the measuring coil are the same.
The second aspect of the present invention provides a saturable reactor loss separation device for a converter valve, wherein the saturable reactor for the converter valve comprises a plurality of iron cores; the saturable reactor loss separation device for a converter valve comprises: the magnetic flux density waveform acquisition module is used for acquiring the magnetic flux density waveform of any iron core in a preset time period; the core loss test model building module is used for building a core loss test model, and the core loss test model comprises a single core, an exciting coil and a measuring coil; the excitation voltage acquisition module is used for calculating the excitation voltage of the exciting coil in a preset time period according to the magnetic flux density waveform, the effective cross section area of the iron core and the number of turns of the exciting coil; the core loss test model parameter acquisition module is used for applying excitation voltage to the excitation coil and acquiring current of the excitation coil and voltage of the measurement coil; and the core loss measurement module is used for measuring the loss of the single core by the current of the exciting coil and the voltage of the measuring coil.
A third aspect of the present invention provides a computer apparatus comprising: at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor to perform a method of saturable reactor loss separation for a converter valve as provided in the pump-alimine third aspect.
A fourth aspect of the present invention provides a computer-readable storage medium storing computer instructions for causing a computer to execute the saturable reactor loss separation method for a converter valve according to the first aspect of the present invention.
The technical scheme of the invention has the following advantages:
1. according to the method for separating the losses of the saturation reactors for the converter valves, the iron core loss test model is established, so that the iron core loss of the saturation reactors for the converter valves is measured in actual operation, after the loss of an independent iron core is obtained, the total iron core loss is calculated according to the loss of the independent iron core and the number of the iron cores in the saturation reactors for the converter valves, then the coil loss of the saturation reactors for the converter valves is calculated according to the total loss measured value and the total iron core loss of the saturation reactors for the converter valves under the pulse synthesis working condition, the separation of the iron core loss and the coil loss in the saturation reactors for the converter valves is realized, the problem of subtraction of a large number caused by subtracting the coil loss calculated value from the total loss value is avoided, the accuracy of loss separation is improved, the loss separation result provides support for the saturation reactors for the converter valves, the test level of the saturation reactors for the converter valves is improved, and the individual design improvement of the iron cores of the saturation reactors for technicians is facilitated.
2. According to the method for separating the losses of the saturation resistor for the converter valve, when the finite element magnetic field analysis model of the saturation resistor for the converter valve is built, the iron core and the spiral coil of the saturation resistor for the converter valve are respectively modeled, so that the finite element magnetic field analysis model of the saturation resistor for the converter valve is obtained, and because the losses of the saturation resistor for the converter valve only comprise the iron core and the coil, the shell, the insulating cushion block and the like are insulating materials, no loss is generated, and the part which does not generate the loss is not modeled during modeling in the embodiment of the invention, the finite element magnetic field analysis model of the saturation resistor for the converter valve built in the embodiment of the invention realizes model simplification on the basis of ensuring the effectiveness of the model, and the modeling process is simpler.
3. According to the saturable reactor loss separation device for the converter valve, the core loss test model is established, so that the core loss of the saturable reactor for the converter valve is measured in actual operation, after the loss of a single core is obtained, the total core loss is calculated according to the loss of the single core and the number of the cores in the saturable reactor for the converter valve, and then the coil loss of the saturable reactor for the converter valve is calculated according to the total loss measured value and the total core loss of the saturable reactor for the converter valve under the pulse synthesis working condition, the separation of the core loss and the coil loss in the saturable reactor for the converter valve is realized, the problem of subtraction of a large number caused by subtracting the coil loss calculated value from the total loss value is avoided, the loss separation precision is improved, the support is provided for the loss and temperature rise control of the saturable reactor for the converter valve, the test level of the saturable reactor for the converter valve is improved, and the independent design improvement of the core of the saturable reactor for the converter valve is facilitated for technicians.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a saturable reactor for a converter valve;
FIG. 2 is a flowchart of a specific example of a method for separating the losses of a saturable reactor for a converter valve according to an embodiment of the present invention;
fig. 3 is a waveform diagram of magnetic flux density of a core in an embodiment of the present invention;
FIG. 4 is a model of an experimental core loss test constructed in an embodiment of the present invention;
FIG. 5 is a graph of calculated excitation voltage waveforms in an embodiment of the present invention;
FIG. 6 is a circuit diagram of an embodiment of the present invention for obtaining exciting coil current and test coil voltage;
fig. 7 is a flowchart of a specific example of a method for separating the losses of a saturable reactor for a converter valve according to an embodiment of the present invention;
FIG. 8 is a finite element analysis model of a saturable reactor for a converter valve, which is built in an embodiment of the present invention;
fig. 9 is a schematic block diagram of a specific example of a saturable reactor loss separation device for a converter valve in an embodiment of the present invention;
fig. 10 is a schematic block diagram of a computer device provided in an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that technical features of different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
Example 1
The converter valve is a key device for extra-high voltage direct current transmission, the saturation reactor is a core device for protecting the switching on and switching off of a thyristor in the converter valve, and the safety operation of the saturation reactor directly influences the safety and reliability of the extra-high voltage direct current transmission, so that the reliability of the saturation reactor for the converter valve is required to be subjected to test evaluation. Loss control is a key index for measuring design rationality and operation reliability of a saturation reactor for a converter valve. The prior test technology can accurately measure the total loss of the saturable reactor for the converter valve, but can not independently measure the loss of each component, lacks an effective method for separating the loss of each component, and is not beneficial to the design improvement of each component of the saturable reactor for the direct current converter valve. Fig. 1 is a schematic diagram of a saturable reactor for a converter valve, and as can be seen from fig. 1, the saturable reactor for a converter valve includes a plurality of cores 102, a spiral coil 101, a case 104, and a plurality of insulating blocks 103, wherein the cores 102 are C-shaped cores.
The embodiment of the invention provides a method for separating the losses of a saturation resistor for a converter valve, which is shown in fig. 2 and comprises the following steps:
step S10: the magnetic flux density waveform of any one of the cores 102 in a preset time period is obtained, in the embodiment of the present invention, the magnetic flux density waveform of the core 102 is obtained after the pulse synthesis voltage under the normal working condition is applied to the spiral coil 101, and in a specific embodiment, the obtained magnetic flux density B (t) waveform is shown in fig. 3.
Step S20: a core loss test model is built, and fig. 4 is a cross-sectional view of the core loss test model, which includes a single core 403, an exciting coil 401, and a measuring coil 402. In the embodiment of the present invention, the iron core 403 used in the core loss test model is any one selected from the plurality of iron cores 102 to be assembled before the converter valve saturable reactor is assembled, and in order to make the data obtained by the core loss test model to be established more accurate, when one iron core 102 is selected to establish the core loss test model in the embodiment of the present invention, the iron core 102 is fastened according to the air length and binding mode of the iron core 102 when the converter valve saturable reactor is assembled.
Step S30: the exciting voltage of the exciting coil 401 in the preset time period is calculated from the magnetic flux density waveform, the effective cross-sectional area of the core 403, and the number of turns of the exciting coil 401:
where N represents the number of turns of the exciting coil, S represents the effective cross-sectional area of the core 403, and B (t) represents the magnetic flux density waveform.
In one embodiment, when the core cross-sectional area s=0.00128 m of the saturable reactor for a converter valve 2 When the number of turns n=22 of the exciting coil, the excitation voltage obtained by combining the magnetic flux density waveforms obtained in the above step S10 is as shown in fig. 5
Step S40: an excitation voltage U (t) is applied to the exciting coil, and the current of the exciting coil 401 and the voltage of the measuring coil 402 are obtained. As shown in fig. 6, in the embodiment of the present invention, the programmable power source 105 is used to apply the pulse synthesis voltage U (t) to the exciting coil 401 of the core 403, then the current of the exciting coil 401 is measured using the current port of the precision power analyzer 106, and the voltage of the measuring coil 402 is measured using the voltage port of the precision power analyzer 106.
Step S50: the loss of the single core is measured from the current of the exciting coil 401 and the voltage of the measuring coil 402. In the embodiment of the present invention, the precision power analyzer 106 may calculate the loss of the core 403 by the current of the exciting coil 401 and the voltage of the measuring coil 402, and then output the loss of the core 403. In one embodiment, when an excitation voltage as shown in FIG. 5 is applied to the excitation coil 401, the resulting loss of the core 403 is W t ＝45W。
Step S60: the total core loss of all the cores 102 is calculated using the loss of the single core 403 and the number of the cores 102 in the saturable reactor for a converter valve, and in the practical saturable reactor for a converter valve, the magnetic field distribution in each pair of cores 102 can be regarded as substantially the same, so in the embodiment of the present invention, the calculated loss of the core 403 and the number of the cores 102 in the saturable reactor for a converter valve can be used to calculate the total core loss of all the cores 102:
W c ＝N core W t ，
wherein N is core Indicating the loss of core 403, W t Indicating the number of cores 102.
In one embodiment, when the loss of the single sub-core 102 is 45W and the total number of cores 102 in the saturable reactor for a converter valve is 9, the total core loss of all cores 102 in the saturable reactor for a converter valve is: w (W) c ＝45×9＝405W。
Step S70: and obtaining a total loss measured value of the saturation resistor for the converter valve under the pulse synthesis working condition, wherein in a specific embodiment, the total loss measured value of the saturation resistor for the converter valve under the pulse synthesis working condition is obtained from a test result of the saturation resistor for the converter valve under the pulse synthesis working condition.
Step S80: the coil loss of the saturation reactor for the converter valve is obtained by the difference between the total loss measurement value and the total core loss:
W coil ＝W total -W c ，
wherein W is total Representing the total loss measurement.
In one embodiment, if the total loss measurement value of the converter valve saturable reactor is 3400W, the coil loss of the converter valve saturable reactor is W coil ＝3400-405＝2995W。
According to the method for separating the losses of the saturation reactors for the converter valves, the iron core loss test model is built, so that the iron core loss of the saturation reactors for the converter valves is measured in actual operation, after the loss of a single iron core is obtained, the total iron core loss is calculated according to the loss of the single iron core and the number of the iron cores in the saturation reactors for the converter valves, then the coil loss of the saturation reactors for the converter valves is calculated according to the total loss measured value and the total iron core loss of the saturation reactors for the converter valves under the pulse synthesis working condition, the separation of the iron core loss and the coil loss in the saturation reactors for the converter valves is realized, the problem of subtraction of a large number caused by subtracting the coil loss calculated value from the total loss value is avoided, the accuracy of loss separation is improved, the loss separation result provides support for the saturation reactor loss and temperature rise control for the converter valves, the test level of the saturation reactors for the converter valves is improved, and the individual design improvement of the iron cores of the saturation reactors for the converter valves is facilitated for technicians.
Table 1 is a comparison of the results obtained by realizing the coil loss and the core loss by the conventional method and the results obtained by the saturable reactor loss separation method for a converter valve provided by the embodiment of the present invention. As can be seen from table 1, in the losses of the saturable reactor for a converter valve, the value of the coil loss is much larger than the value of the core loss, and the coil loss is calculated first by the conventional method, and then the core loss is obtained from the total loss measurement value and the calculated coil loss, thereby realizing the separation of the coil loss and the core loss. However, a certain error exists when the coil loss is calculated, the minimum error of the coil loss is controlled within 5%, the smaller the error to be calculated is, the larger the calculation cost is, and the larger the coil loss occupies in the total loss, even if the error is controlled within 5%, the error value of the calculated coil loss is larger, so that the core loss obtained by final calculation is greatly influenced. However, in the embodiment of the invention, loss separation is realized by measuring the core loss first and then calculating the coil loss through the core loss, and compared with the result obtained through calculation, the result obtained through measurement has smaller error, and because the core loss occupies smaller total loss, even if certain error exists during measurement, the coil loss calculated finally cannot be greatly influenced. Therefore, the method for separating the losses of the saturation resistor for the converter valve provided by the embodiment of the invention avoids the problem of subtraction of a large number caused by subtracting the coil loss calculated value from the total loss value, and improves the accuracy of loss separation.
TABLE 1
| Method | Total loss measurement (W) | Coil loss (W) | Core loss (W) |
| Traditional Chinese medicine | 3400 | 3115 (calculation) | 285 |
| This patent | 3400 | 2995 | 405 (measurement) |
| Error (%) | / | 4.01 | -29.63 |
In an alternative embodiment, as shown in fig. 7, the step S10 specifically includes:
step S11: as shown in fig. 8, a finite element magnetic field analysis model of a saturable reactor for a converter valve is established, and the finite element magnetic field analysis model includes a helical coil finite element model 201 and a core finite element model 202, and the core finite element model 202 includes a plurality of cores.
Step S12: to measure the losses of the core 102 and the spiral coil 101 in the saturation reactor for a converter valve in a normal operating environment, a pulse synthesis voltage is applied to the simulated spiral coil finite element model 201 in the embodiment of the present invention, which is a pulse synthesis voltage under a normal operating condition.
Step S13: the magnetic flux density waveform of the core in the core finite element model 202 in a preset time period is obtained through finite element calculation.
In an alternative embodiment, the step S13 includes: the magnetic field of the saturation reactor for the converter valve is calculated by using a transient finite element analysis method, so that the magnetic flux density of the iron core in the iron core finite element model 202 at any moment in a preset time period is obtained, and a magnetic flux density waveform is formed. In the embodiment of the invention, the nonlinear characteristics of the iron core in the iron core finite element model 202 can be simulated through the direct current magnetization curve, and then the transient finite element analysis method is adopted, so that the magnetic field of the saturation reactor for the converter valve is calculated by taking the nonlinear characteristics of the iron core into consideration. It should be noted that the magnetization curves can be divided into ac and dc, and different magnetization curves are adopted to have a certain influence on the calculation result of the magnetic flux density waveform.
In an alternative embodiment, the step S11 includes modeling the core 102 and the spiral coil 101 of the saturable reactor for a converter valve according to the structure of the saturable reactor for a converter valve, so as to obtain a finite element magnetic field analysis model, and since the shell 104 and the insulating block 103 of the saturable reactor for a converter valve do not generate loss and have negligible influence on the magnetic field result, only the core 102 and the spiral coil 101 having a large influence on the magnetic field result and having loss are considered for modeling in the embodiment of the present invention.
According to the method for separating the losses of the saturation resistor for the converter valve, when the finite element magnetic field analysis model of the saturation resistor for the converter valve is built, the iron core and the spiral coil of the saturation resistor for the converter valve are respectively modeled, so that the finite element magnetic field analysis model of the saturation resistor for the converter valve is obtained, and because the losses of the saturation resistor for the converter valve only comprise the iron core and the coil, the shell, the insulating cushion block and the like are insulating materials, no loss is generated, and the part which does not generate the loss is not modeled during modeling in the embodiment of the invention, the finite element magnetic field analysis model of the saturation resistor for the converter valve built in the embodiment of the invention realizes the simplification of the model on the basis of ensuring the effectiveness of the model, and the modeling process is simpler.
In the embodiment of the present invention, in the core loss test model established in the above step S20, the number of turns of the exciting coil 401 and the measuring coil 402 is the same, and in the embodiment of the present invention, the exciting coil 401 and the measuring coil 402 are uniformly wound by using a plurality of annealed copper wires.
Example 2
The embodiment of the invention provides a saturable reactor loss separation device for a converter valve, wherein the saturable reactor for the converter valve comprises a plurality of iron cores 102, as shown in fig. 9, the saturable reactor loss separation device for the converter valve comprises:
the magnetic flux density waveform obtaining module 10 is configured to obtain a magnetic flux density waveform of any one of the cores 102 during a preset time period, and the detailed description is described in the above embodiment 1 with reference to step S10.
The core-loss test model building block 20 is used for building a core-loss test model, and the core-loss test model comprises a single core 403, an exciting coil 401 and a measuring coil 402, and the detailed description is described in the above embodiment 1 for the step S20.
The excitation voltage acquisition module 30 is configured to calculate the excitation voltage of the exciting coil 401 in a preset time period according to the magnetic flux density waveform, the effective cross-sectional area of the core 403, and the number of turns of the exciting coil 401, and the detailed description is given in the above description of step S30 in embodiment 1.
The core loss test model parameter obtaining module 40 is configured to apply an excitation voltage to the exciting coil 401, obtain a current of the exciting coil 401 and a voltage of the measuring coil 402, and is described in detail in the above description of step S40 in embodiment 1.
The core loss measurement module 50 is used for calculating the loss of the core 102 from the current of the exciting coil 401 and the voltage of the measuring coil 403, and the detailed description is given in the above description of step S50 in embodiment 1.
A total core loss calculation module 60 for calculating the total core loss of the saturable reactor for a converter valve using the loss of the single core and the number of cores in the saturable reactor for a converter valve, as described in detail in the above embodiment 1 with reference to step S60.
The total loss measurement value obtaining module 70 is configured to obtain a total loss measurement value of the converter valve saturable reactor under a pulse synthesis condition, and the detailed description is described in the above embodiment 1 with reference to step S70.
A coil loss calculation module 80 for obtaining the coil loss of the saturable reactor for a converter valve from the difference between the total loss measurement value and the total core loss, and the detailed description is given in the above description of step S80 in embodiment 1.
According to the saturable reactor loss separating device for the converter valve, the core loss test model is built, so that the core loss of the saturable reactor for the converter valve is measured in actual operation, after the loss of a single core is obtained, the total core loss is calculated according to the loss of the single core and the number of the cores in the saturable reactor for the converter valve, then the coil loss of the saturable reactor for the converter valve is calculated according to the total loss measured value and the total core loss of the saturable reactor for the converter valve under the pulse synthesis working condition, the separation of the core loss and the coil loss in the saturable reactor for the converter valve is realized, the problem of subtraction of a large number caused by subtracting the coil loss calculated value from the total loss value is avoided, the loss separation precision is improved, the support is provided for the saturable reactor loss and temperature rise control for the converter valve, the test level of the saturable reactor is improved, and the technology personnel is facilitated to carry out independent design improvement on the core of the saturable reactor for the converter valve.
Example 3
An embodiment of the present invention provides a computer device, as shown in fig. 10, where the computer device mainly includes one or more processors 31 and a memory 32, and one processor 31 is illustrated in fig. 10.
The computer device may further include: an input device 33 and an output device 34.
The processor 31, the memory 32, the input device 33 and the output device 34 may be connected by a bus or otherwise, which is illustrated in fig. 10 as a bus connection.
The processor 31 may be a central processing unit (Central Processing Unit, CPU). The processor 31 may also be other general purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), field programmable gate arrays (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or a combination thereof. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The memory 32 may include a storage program area that may store an operating system, at least one application program required for functions, and a storage data area; the storage data area may store data created from the use of the converter valve-use saturable reactor loss separation device, or the like. In addition, the memory 32 may include high-speed random access memory, and may also include non-transitory memory, such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, memory 32 may optionally include memory remotely located with respect to processor 31, which may be connected to the converter valve saturable reactor loss separation device via a network. The input device 33 may receive a user entered calculation request (or other numeric or character information) and generate a key signal input associated with the converter valve saturable reactor loss separation device. The output device 34 may include a display device such as a display screen for outputting the calculation result.
Example 4
An embodiment of the present invention provides a computer readable storage medium storing computer instructions, where the computer readable storage medium stores computer executable instructions, where the computer executable instructions may perform the method for separating the losses of a saturable reactor for a converter valve in any of the above method embodiments. The storage medium may be a magnetic Disk, an optical Disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a Flash Memory (Flash Memory), a Hard Disk (HDD), or a Solid State Drive (SSD); the storage medium may also comprise a combination of memories of the kind described above.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.
Claims (9)
1. The method for separating the losses of the saturation resistor for the converter valve is characterized in that the saturation resistor for the converter valve comprises a plurality of iron cores;
the method for separating the losses of the saturation resistor for the converter valve comprises the following steps:
acquiring a magnetic flux density waveform of any iron core in a preset time period;
establishing an iron core loss test model, wherein the iron core loss test model comprises a single iron core, an exciting coil and a measuring coil;
calculating excitation voltage of the exciting coil in the preset time period according to the magnetic flux density waveform, the effective cross section area of the iron core and the turns of the exciting coil;
applying the excitation voltage to the excitation coil to obtain the current of the excitation coil and the voltage of the measurement coil;
measuring the loss of the single iron core by the current of the exciting coil and the voltage of the measuring coil;
calculating a total core loss of the converter valve transductor using the loss of the single core and the number of cores in the converter valve transductor;
acquiring a total loss measured value of the saturation reactor for the converter valve under a pulse synthesis working condition;
and obtaining the coil loss of the saturation reactor for the converter valve according to the difference between the total loss measured value and the total core loss.
2. The method of claim 1, wherein the step of obtaining a magnetic flux density waveform of any one of the cores for a predetermined period of time comprises:
establishing a finite element magnetic field analysis model of the saturation reactor for the converter valve, wherein the finite element magnetic field analysis model comprises a spiral coil finite element model and an iron core finite element model;
applying a pulse synthesis voltage to the helical coil finite element model;
and obtaining the magnetic flux density waveform of the iron core in the iron core finite element model in a preset time period through finite element calculation.
3. The method for separating the losses of the saturable reactor for a converter valve according to claim 2, wherein the obtaining the magnetic flux density waveform of the core in the core finite element model for a predetermined period of time by finite element calculation includes:
and calculating the magnetic field of the saturation reactor for the converter valve by using a transient finite element analysis method, and obtaining the magnetic flux density of the iron core in the iron core finite element model at any moment in the preset time period to form the magnetic flux density waveform.
4. The method for separating the losses in a transductor for a converter valve according to claim 1, wherein the excitation voltage is calculated by the following formula:
wherein N represents the number of turns of the exciting coil, S represents the effective cross-sectional area of the core, and B (t) represents the magnetic flux density waveform.
5. The method for separating the losses of the transductor for a converter valve according to claim 2, wherein said establishing a finite element magnetic field analysis model of the transductor for a converter valve includes:
and respectively modeling an iron core and a spiral coil of the saturation reactor for the converter valve according to the structure of the saturation reactor for the converter valve to obtain the finite element magnetic field analysis model.
6. The method for separating the losses in a transductor for a converter valve according to any one of claims 1 to 5, wherein the number of turns of the exciting coil and the measuring coil are the same.
7. The device for separating the losses of the saturation resistor for the converter valve is characterized by comprising a plurality of iron cores;
the saturable reactor loss separation device for the converter valve comprises:
the magnetic flux density waveform acquisition module is used for acquiring the magnetic flux density waveform of any iron core in a preset time period;
the core loss test model building module is used for building a core loss test model, and the core loss test model comprises a single core, an exciting coil and a measuring coil;
the excitation voltage acquisition module is used for calculating the excitation voltage of the exciting coil in the preset time period according to the magnetic flux density waveform, the effective cross-sectional area of the iron core and the turns of the exciting coil;
the core loss test model parameter acquisition module is used for applying the excitation voltage to the excitation coil and acquiring the current of the excitation coil and the voltage of the measurement coil;
a core loss measurement module for measuring a loss of a single core from a current of the exciting coil and a voltage of the measuring coil;
a total core loss calculation module configured to calculate a total core loss of the converter valve transductor using a loss of the single core and the number of cores in the converter valve transductor;
the total loss measurement value acquisition module is used for acquiring the total loss measurement value of the saturation reactor for the converter valve under the pulse synthesis working condition;
and the coil loss calculation module is used for obtaining the coil loss of the saturation reactor for the converter valve from the difference between the total loss measured value and the total core loss.
8. A computer device, comprising:
at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor to perform the method of transduce reactor loss separation for a converter valve of any of claims 1-6.
9. A computer-readable storage medium storing computer instructions for causing the computer to execute the saturable reactor loss separation method for a converter valve according to any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010367886.9A CN111581864B (en) | 2020-04-30 | 2020-04-30 | Method and device for separating losses of saturation reactor for converter valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010367886.9A CN111581864B (en) | 2020-04-30 | 2020-04-30 | Method and device for separating losses of saturation reactor for converter valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111581864A CN111581864A (en) | 2020-08-25 |
| CN111581864B true CN111581864B (en) | 2023-04-28 |
Family
ID=72120431
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010367886.9A Active CN111581864B (en) | 2020-04-30 | 2020-04-30 | Method and device for separating losses of saturation reactor for converter valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111581864B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112487677B (en) * | 2020-11-20 | 2023-09-15 | 西安西电变压器有限责任公司 | Method and device for calculating core loss of reactor |
| CN112560301B (en) * | 2020-11-26 | 2021-10-08 | 东南大学 | Magnetic material eddy current loss calculation method based on magnetic induction principle |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009011536A2 (en) * | 2007-07-16 | 2009-01-22 | Hankook Ied | Method of compensating for errors of measuring current transformer in consideration of hysteresis characteristics of core |
| CN102608552A (en) * | 2012-04-14 | 2012-07-25 | 河北工业大学 | Acquiring method of DC (direct-current) bias magnet ratio total losses curve of transformer core material |
-
2020
- 2020-04-30 CN CN202010367886.9A patent/CN111581864B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009011536A2 (en) * | 2007-07-16 | 2009-01-22 | Hankook Ied | Method of compensating for errors of measuring current transformer in consideration of hysteresis characteristics of core |
| CN102608552A (en) * | 2012-04-14 | 2012-07-25 | 河北工业大学 | Acquiring method of DC (direct-current) bias magnet ratio total losses curve of transformer core material |
Non-Patent Citations (1)
| Title |
|---|
| 张丽萍 ; 陈为 ; 汪晶慧 ; .速饱和电感磁芯损耗测量与模型研究.中国电机工程学报.2018,(15),全文. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111581864A (en) | 2020-08-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111581864B (en) | Method and device for separating losses of saturation reactor for converter valve | |
| Mihaila et al. | A simulation method to predict the turn-to-turn voltage spikes in a PWM fed motor winding | |
| US20120167025A1 (en) | Method for analyzing sensitivity and failure probability of a circuit | |
| CN107192738B (en) | Method and device for detecting material of distribution transformer winding | |
| CN103344913A (en) | Electromagnetic relay testing equipment and method | |
| RU2720586C2 (en) | System for determining the allowable correlation limit using iterative cross validation and method of its implementation | |
| JP2019036061A (en) | Factor analyzer, factor analysis method and program | |
| JP2012129527A (en) | Method and system for monitoring transformer health | |
| CN112362971B (en) | Power module equivalent resistance testing method, device, equipment and storage medium | |
| JPH065261B2 (en) | Electronic device or circuit test method and apparatus | |
| CN108650768B (en) | Filament current control method and device | |
| CN113295953B (en) | Overvoltage protection test system and method | |
| CN114578121A (en) | High-voltage measuring method, system and device | |
| RU2650695C2 (en) | Method and device for monitoring transformer state | |
| CN114325057B (en) | PT primary voltage reconstruction method based on inverse black box and inverse electromagnetic dual model | |
| CN111414724B (en) | Circuit simulation optimization method | |
| JP4777227B2 (en) | Parameter extraction method, circuit operation verification method, and storage medium comprising a program for executing the parameter extraction method | |
| JPH08114634A (en) | Contact resistance measuring device | |
| CN113156357A (en) | Segmented current transformer correction method and device, electronic device and storage medium | |
| CN109613347B (en) | Excitation characteristic detection method and device of transformer | |
| JP2013080787A (en) | Life estimation device, life estimation method and program | |
| CN107942278B (en) | Simple method and device for calculating transient transmission characteristic of current transformer | |
| CN111965392A (en) | Test system and operation method thereof | |
| CN113435795B (en) | State evaluation method, device, equipment and medium for power equipment | |
| JPWO2012124359A1 (en) | Impedance measurement system, impedance measurement method and program |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |