CN111244920B - Simulation modeling method and device for high-voltage large-capacity resistive superconducting current limiter - Google Patents
Simulation modeling method and device for high-voltage large-capacity resistive superconducting current limiter Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
- H02H9/023—Current limitation using superconducting elements
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
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Abstract
The invention discloses a simulation modeling method and device for a high-voltage large-capacity resistive superconducting current limiter, which comprises the following steps: through an overcurrent impact experiment, a quench resistor curve of the current limiter and the resistance value of the first quench resistor are obtained, and meanwhile, the first liquid nitrogen heat dissipation power is calculated; calculating the total memorized heat Q of the joule heat power by taking the short-circuit current amplitude as input; calculating the resistance value of the quench resistor and the working temperature T of the current limiter and taking the resistance value and the working temperature T as output; and calculating the second liquid nitrogen heat dissipation power, endowing the value of the second liquid nitrogen heat dissipation power to the first liquid nitrogen heat dissipation power, endowing the resistance value of the quench resistor to the resistance value of the first quench resistor, and performing iterative calculation of the next calculation step. The invention takes the overcurrent experimental data of a prototype of the current limiter as the basis, simplifies and replaces the complex structure of the current limiter by adopting the quench resistance characteristic, effectively reduces the test difficulty of the high-voltage capacity resistance type superconducting current limiter, and meets the accuracy requirement of engineering application; greatly reducing the difficulty of building the experimental platform.
Description
Technical Field
The invention relates to the technical field of electric power, in particular to a simulation modeling method and device for a high-voltage large-capacity resistive superconducting current limiter.
Background
At present, with the increase of electrical loads and the interconnection between large power grids, the amplitude of the short-circuit current of the power system is continuously increased. At the most severe short circuit fault, the short circuit current magnitude has exceeded the maximum breaking capacity of existing circuit breakers. The superconducting current limiter is a novel fault current limiting device, can effectively reduce short-circuit current when short-circuit fault occurs, is matched with a circuit breaker to cut off the fault, and improves the safety and reliability of a power system.
The resistive superconducting current limiter utilizes the quench characteristic of a superconducting material, and when a system normally operates, the current limiter is in a superconducting state with zero resistance, and the on-state loss is almost zero; when short-circuit fault occurs, the current limiter rapidly quenches under the action of overcurrent, a large quenching resistor is presented to the outside, and the rising speed of short-circuit current and the amplitude of the short-circuit current are limited. The resistive superconducting current limiter has the advantages of simple principle and compact structure, and is the type of the superconducting current limiter which is most applied at present. The German Ampunity project completes the grid-connected test of the 10kV/2.3kA resistance type superconducting current limiter in 2011-2013; italy completed resistive superconducting current limiter short circuit tests with different capacities in 2015 and 2016 respectively; in China, Shanghai university of transportation in 2014, a resistance type superconducting current limiter prototype is designed, and a through-current test and a short-circuit test are performed; in 2018, a resistance type superconducting current limiter prototype of 160kV/1kA is developed for a south China multi-terminal soft-straight system, and a grid-connected experiment is about to be carried out.
However, for a high-voltage large-capacity resistive superconducting current limiter, the quenching process is influenced by a plurality of physical factors such as current, temperature and the like, so that the precise description of the quenching resistance is still very difficult. On the other hand, the possible fault conditions of the power system are complex and changeable, and different short-circuit current amplitudes can influence the quench degree of the current limiter. When the short-circuit current is large, the current limiter is quenched quickly, and the superconducting strip is possibly burnt due to overhigh temperature; when the short-circuit current is small, the influence of liquid nitrogen cooling is larger than the quench heating of the current limiter, and the temperature is gradually reduced to recover the superconducting state. If the quench characteristics under all short-circuit current levels are tested in an experimental manner, the difficulty and the cost of the experimental platform are greatly improved.
In summary, when the quench characteristics at all short-circuit current levels are tested in an experimental manner in the prior art, the technical problem of high difficulty in building the experimental platform exists.
Disclosure of Invention
The invention provides a simulation modeling method and device for a high-voltage high-capacity resistive superconducting current limiter, which are used for solving the technical problem that the difficulty in building an experimental platform is high when the quench characteristics of all short-circuit current levels are tested in an experimental mode in the prior art.
The invention provides a simulation modeling method of a high-voltage large-capacity resistive superconducting current limiter, which comprises the following steps of:
step S1: through an overcurrent impact experiment, a quench resistor curve of the current limiter and the resistance value of the first quench resistor are obtained, and meanwhile, the first liquid nitrogen heat dissipation power is calculated;
step S2: calculating joule heating power by taking the short-circuit current amplitude as input based on the resistance value of the first quench resistor; multiplying the difference between the joule heating power and the first liquid nitrogen heat dissipation power by the simulation calculation step length to obtain a heat variation delta Q;
step S3: obtaining a total heat quantity Q based on the heat quantity variable quantity delta Q;
step S4: calculating the resistance value of the quench resistor and the working temperature T of the current limiter on the basis of the total heat Q, and taking the resistance value of the quench resistor and the working temperature T of the current limiter as output;
step S5: and calculating second liquid nitrogen heat dissipation power according to the working temperature T of the current limiter, endowing the value of the second liquid nitrogen heat dissipation power to the first liquid nitrogen heat dissipation power in the step S2, endowing the resistance value of the quench resistor to the resistance value of the first quench resistor in the step S2, and performing iterative calculation of the next calculation step.
Preferably, the specific process of step S1 is as follows:
performing an overcurrent impact experiment on the current limiter, and measuring the voltage and the current of the current limiter under the action of overcurrent;
and dividing the voltage by the current to obtain the resistance value of the first quench resistor, multiplying the voltage by the current to obtain the heat generated by the current limiter, wherein the corresponding relation between the resistance value and the heat of the first quench resistor is the quench resistor curve.
Preferably, if the superconducting current limiter is a high-voltage high-capacity superconducting current limiter, one current-limiting coil in the superconducting current limiter is selected to perform an impact experiment, and then a complete quench resistance curve is obtained through conversion according to a proportion.
Preferably, in step S3, the heat quantity change Δ Q in all the calculation time periods is added up to obtain the total heat quantity Q.
Preferably, in step S4, the resistance value R of the quench resistor corresponding to the total heat amount Q is found in the quench resistor curve by interpolation.
Preferably, when the total heat quantity Q is zero, the resistance value of the quench resistor corresponding to the quench resistor curve is a non-zero value.
Preferably, in step S4, the total heat Q is divided by the product of the mass m and the specific heat capacity c of the restrictor to obtain the temperature change Δ T, and the temperature change is calculatedDelta T and liquid nitrogen reference temperature TrefThe summation yields the operating temperature T of the current limiter.
Preferably, the mass m and the specific heat capacity c of the current limiter are the specific heat capacity and the mass of the superconducting tape part of the current limiter.
Preferably, in step S5, the corresponding liquid nitrogen heat exchange coefficient h at the operating temperature T is queried by an interpolation method, and the heat exchange coefficient h is multiplied by the liquid nitrogen contact surface S and the temperature variation Δ T to obtain the second liquid nitrogen heat dissipation power.
A high-voltage large-capacity resistive superconducting current limiter simulation modeling device comprises a processor and a memory;
the memory is used for storing program codes and transmitting the program codes to the processor;
the processor is used for executing the simulation modeling method of the high-voltage large-capacity resistive superconducting current limiter according to the instructions in the program codes.
According to the technical scheme, the embodiment of the invention has the following advantages:
the current limiter modeling method provided by the embodiment of the invention is based on overcurrent experimental data of a current limiter prototype, simplifies and replaces the complex structure of the current limiter by adopting the quench resistance characteristic, effectively reduces the test difficulty of the high-voltage capacity resistance type superconducting current limiter, and meets the accuracy requirement of engineering application; for a prototype of the current limiter with large capacity, if the manufacturing cost of the overcurrent experiment platform is too high, the current limiting unit or the superconducting coil can be selected to carry out an overcurrent impact experiment, and the obtained quenching resistance curve is large. The integral quench resistance curve of the current limiter can be obtained by superposing the curves of a plurality of current limiting units or coils, so that the difficulty in building an experimental platform is greatly reduced.
The embodiment of the invention also has the following advantages:
the embodiment of the invention is suitable for various different system working conditions. Under the normal rated working state, the resistance of the current limiter is zero; when the short-circuit current of the system is small, the dynamic balance of the current limiter joule heat and the liquid nitrogen heat dissipation can be realized, and the quench resistance is stabilized to a small value; when the system has a fault when a serious short circuit occurs, the quenching heating of the current limiter is far greater than the heat dissipation of liquid nitrogen, and the quenching resistance is rapidly increased; when the short-circuit fault is removed, the current limiter stops heating, and the model can calculate the liquid nitrogen heat dissipation power according to the temperature, so that the recovery time required by cooling the current limiter to the superconducting state is calculated. The current limiter quench resistance and temperature can be estimated, the precision required by engineering application is met, the operation speed is high, and the current limiter quench resistance and temperature estimation method is suitable for analyzing the system characteristics after the current limiter is connected.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a method flowchart of a simulation modeling method and apparatus for a high-voltage large-capacity resistive superconducting current limiter according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a quench resistance curve of a simulation modeling method and device for a high-voltage large-capacity resistive superconducting current limiter according to an embodiment of the present invention.
Fig. 3 is a liquid nitrogen heat transfer coefficient curve diagram of a simulation modeling method and device for a high-voltage large-capacity resistive superconducting current limiter according to an embodiment of the present invention.
Fig. 4 is a structural diagram of a flexible dc power transmission system of a simulation modeling method and apparatus for a high-voltage large-capacity resistive superconducting current limiter according to an embodiment of the present invention.
Fig. 5 is a diagram of a short-circuit current waveform and a quench resistance when a unipolar ground short circuit occurs in the high-voltage large-capacity resistive superconducting current limiter simulation modeling method and apparatus according to the embodiments of the present invention.
Fig. 6 is a waveform diagram of temperature change when a single-pole ground short circuit occurs in a system of the simulation modeling method and device for the high-voltage large-capacity resistive superconducting current limiter according to the embodiment of the present invention.
Fig. 7 is a schematic diagram of a short-circuit current waveform and a quench resistance when a bipolar short circuit occurs in a system of the high-voltage large-capacity resistive superconducting current limiter simulation modeling method and apparatus according to the embodiment of the present invention.
Fig. 8 is a waveform diagram of temperature change when a bipolar short circuit occurs in a system of the simulation modeling method and device for the high-voltage large-capacity resistive superconducting current limiter according to the embodiment of the present invention.
Fig. 9 is a schematic diagram of temperature and resistance recovery when a bipolar short circuit occurs in a system of the high-voltage large-capacity resistive superconducting current limiter simulation modeling method and apparatus according to the embodiment of the present invention.
Fig. 10 is a device framework diagram of a simulation modeling method and device for a high-voltage large-capacity resistive superconducting current limiter according to an embodiment of the present invention.
Detailed Description
The embodiment of the invention provides a simulation modeling method and equipment for a high-voltage large-capacity resistive superconducting current limiter, which are used for solving the technical problem of high difficulty in building an experimental platform when the quench characteristics of all short-circuit current levels are tested in an experimental mode in the prior art.
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Referring to fig. 1, fig. 1 is a flowchart of a simulation modeling method and apparatus for a high-voltage bulk resistive superconducting current limiter according to an embodiment of the present invention.
As shown in fig. 1, the simulation modeling method for the high-voltage large-capacity resistive superconducting current limiter provided by the invention comprises the following steps:
step S1: through an overcurrent impact experiment, a quench resistor curve of the current limiter and a resistance value R of the first quench resistor are obtained; for a high-voltage large-capacity superconducting current limiter prototype, if the overcurrent experiment difficulty of the complete prototype is higher, a scaling prototype can be used instead, or one current limiting module or one coil can be taken for carrying out an impact experiment, then the quench resistance curve of the complete prototype is obtained through scaling, and meanwhile, the first liquid nitrogen heat dissipation power is calculated;
step S2: calculating the Joule heating power P based on the resistance R of the first quench resistor and the short-circuit current amplitude I as inputheat(ii) a Will joule heating power PheatAnd the first liquid nitrogen heat dissipation power PcoolDifference of (d) and simulation calculation step length tstepMultiplying to obtain a heat variation delta Q;
step S3: obtaining a total heat quantity Q based on the heat quantity variable quantity delta Q;
step S4: calculating the resistance value of the quench resistor and the working temperature T of the current limiter on the basis of the total heat Q, and taking the resistance value of the quench resistor and the working temperature T of the current limiter as output to calculate the short-circuit current amplitude of the system in real time;
step S5: calculating a second liquid nitrogen heat dissipation power according to the working temperature T of the flow restrictor, and giving the value of the second liquid nitrogen heat dissipation power to the first liquid nitrogen heat dissipation power P in the step S2coolThe resistance value of the quench resistor is given to the resistance value R of the first quench resistor in step S2, and iterative calculation of the next calculation step is performed.
As a preferred embodiment, the specific process of step S1 is as follows:
performing an overcurrent impact experiment on the current limiter, and measuring the voltage and the current of the current limiter under the action of overcurrent;
and dividing the voltage by the current to obtain the resistance value of the first quench resistor, multiplying the voltage by the current to obtain the heat generated by the current limiter, wherein the corresponding relation between the resistance value and the heat of the first quench resistor is the quench resistor curve.
As a preferred embodiment, if the superconducting current limiter is a high-voltage high-capacity superconducting current limiter, one current-limiting coil in the superconducting current limiter is selected to perform an impact experiment, and then a complete quench resistance curve is obtained by conversion in proportion, so that the difficulty of an overcurrent experiment is reduced.
As a preferred embodiment, in step S3, the heat quantity change amounts Δ Q in all the calculation time periods are added up to obtain the total heat quantity Q.
As a preferred embodiment, in step S4, the resistance value R of the quench resistor corresponding to the total heat quantity Q is found in the quench resistor curve by interpolation. Interpolation is the complementary interpolation of a continuous function on the basis of discrete data, so that this continuous curve passes through all given discrete data points. Interpolation is an important method for approximation of discrete functions, and can be used for estimating the approximate value of a curve at other points through the value conditions of the curve at a limited number of points.
As a preferred embodiment, when the total heat Q is zero, the resistance value of the corresponding quench resistor on the quench resistor curve is an extremely small non-zero value; on the one hand, the fault circuit is used for preventing the singularity of the curve caused by the fact that the quenching resistance is zero, and on the other hand, the fault circuit is used for accumulating heat at the initial stage of short-circuit fault.
As a preferred embodiment, in step S4, the total heat Q is divided by the product of the mass m and the specific heat capacity c of the restrictor to obtain the temperature change Δ T, and the temperature change Δ T is compared with the reference temperature T of liquid nitrogenrefThe summation yields the operating temperature T of the current limiter.
As a preferred embodiment, the mass m and the specific heat capacity c of the current limiter are the specific heat capacity and the mass of the superconducting tape part of the current limiter, and a supporting structure, insulation and the like of the current limiter are not included, so that a large error in calculation is avoided.
As a preferred embodiment, in step S5, the heat exchange coefficient h of the liquid nitrogen corresponding to the operating temperature T is queried by an interpolation method, and the heat exchange coefficient h is multiplied by the liquid nitrogen contact surface S and the temperature variation Δ T to obtain the second liquid nitrogen heat dissipation power.
As shown in fig. 10, a high-voltage bulk resistive superconducting current limiter simulation modeling apparatus 20 includes a processor 200 and a memory 201;
the memory 201 is used for storing a program code 202 and transmitting the program code 202 to the processor;
the processor 200 is configured to execute the steps of the simulation modeling method for the high-voltage bulk resistive superconducting current limiter according to the instructions in the program code 202.
Illustratively, the computer program 202 may be partitioned into one or more modules/units, which are stored in the memory 201 and executed by the processor 200 to accomplish the present application. The one or more modules/units may be a series of computer program instruction segments capable of performing specific functions, which are used to describe the execution process of the computer program 202 in the terminal device 20.
The terminal device 20 may be a computing device such as a desktop computer, a notebook, a palm computer, and a cloud server. The terminal device may include, but is not limited to, a processor 200, a memory 201. Those skilled in the art will appreciate that fig. 10 is merely an example of a terminal device 20 and does not constitute a limitation of terminal device 20 and may include more or fewer components than shown, or some components may be combined, or different components, e.g., the terminal device may also include input-output devices, network access devices, buses, etc.
The Processor 200 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The storage 201 may be an internal storage unit of the terminal device 20, such as a hard disk or a memory of the terminal device 20. The memory 201 may also be an external storage device of the terminal device 20, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like, which are provided on the terminal device 20. Further, the memory 201 may also include both an internal storage unit and an external storage device of the terminal device 20. The memory 201 is used for storing the computer program and other programs and data required by the terminal device. The memory 201 may also be used to temporarily store data that has been output or is to be output.
Example 2
In this embodiment, an overcurrent impact experiment was performed on an 1/4 scaling model machine, the correspondence between the quench resistance and the accumulated joule heat was measured, and scaling was performed to obtain a quench resistance curve of the complete model machine, as shown in fig. 2.
Wherein, the liquid nitrogen heat exchange curve is shown in figure 3; as the temperature difference between the liquid nitrogen and the solid surface gradually rises, the liquid nitrogen undergoes four stages of free convection, nucleate boiling, transition boiling and film boiling, and the corresponding cooling effects are also different.
The simulation modeling method for the high-voltage large-capacity resistive superconducting current limiter provided by the embodiment is applied to a system shown in fig. 4, the system is a two-end flexible direct-current transmission system, the voltage class is +/-160 kV, a plurality of half-bridge sub-modules form a modular multilevel, and the inside of a converter valve is of a pseudo-bipolar structure. Two outlet ends of the converter valve are provided with direct current breakers, and the superconducting current limiter is arranged on a negative direct current bus. Selecting two short circuit types for fault analysis, wherein the fault is that a negative direct current bus generates a unipolar short circuit to the ground, and the fault is that a bipolar short circuit occurs between a positive direct current bus and a negative direct current bus; the short-circuit current of two faults is different in magnitude, and the current limiting effect of the superconducting current limiter can be tested.
In the case of a fault (i) single pole to ground short circuit, the short circuit current and the current limiter quench resistance are as shown in fig. 5. The current limiter has a smaller quench resistance due to a smaller short circuit current level. When the breaker clears the fault, the quench resistance quickly drops to zero. The temperature of the current limiter is shown in fig. 6 to be about 80K at maximum, and the temperature is cooled to 77K soon after the line current drops to zero.
Under fault-bipolar short circuit, the short circuit current and quench resistance are as shown in fig. 7. The bipolar short circuit is the most serious fault on the direct current side of the flexible direct current system, and the peak value and the steady-state value of the short circuit current are higher. Under the action of overcurrent, the quench resistance of the superconducting current limiter is rapidly increased and is far greater than that of a single-pole short circuit to the ground. The temperature change of the current limiter is shown in fig. 8, and the maximum temperature reaches 150K, which is serious quench. The recovery process of the current limiter is shown in fig. 9, when the short-circuit fault is cleared, the temperature of the current limiter is gradually reduced under the cooling effect of liquid nitrogen, and the time required for recovering from the maximum temperature rise to 77K is 0.36 s.
According to practical examples, the method provided by the embodiment can be directly embedded in system simulation software, the quench resistance and the temperature can be rapidly calculated, the method is suitable for serious short-circuit faults and short-circuit faults with small current, the liquid nitrogen cooling effect after the faults are cleared can be calculated, and therefore the recovery time of the current limiter is calculated.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A simulation modeling method for a high-voltage large-capacity resistive superconducting current limiter is characterized by comprising the following steps:
step S1: through an overcurrent impact experiment, a quench resistor curve of the current limiter and the resistance value of the first quench resistor are obtained, meanwhile, the first liquid nitrogen heat dissipation power is calculated, and the corresponding relation between the resistance value of the first quench resistor and the heat generated by the current limiter is the quench resistor curve;
step S2: calculating joule heating power by taking the short-circuit current amplitude as input based on the resistance value of the first quench resistor; multiplying the difference between the joule heating power and the first liquid nitrogen heat dissipation power by the simulation calculation step length to obtain a heat variation quantity delta Q;
step S3: obtaining a total heat quantity Q based on the heat quantity variable quantity delta Q;
step S4: calculating the resistance value of the quench resistor and the working temperature T of the current limiter on the basis of the total heat Q, and taking the resistance value of the quench resistor and the working temperature T of the current limiter as output;
step S5: and calculating second liquid nitrogen heat dissipation power according to the working temperature T of the current limiter, endowing the value of the second liquid nitrogen heat dissipation power to the first liquid nitrogen heat dissipation power in the step S2, endowing the resistance value of the quench resistor to the resistance value of the first quench resistor in the step S2, and performing iterative calculation of the next calculation step.
2. The simulation modeling method for the high-voltage large-capacity resistive superconducting current limiter according to claim 1, wherein the specific process of the step S1 is as follows:
performing an overcurrent impact experiment on the current limiter, and measuring the voltage and the current of the current limiter under the action of overcurrent;
and dividing the voltage by the current to obtain the resistance value of the first quench resistor, multiplying the voltage by the current to obtain the heat generated by the current limiter, wherein the corresponding relation between the resistance value and the heat of the first quench resistor is the quench resistor curve.
3. The simulation modeling method for the high-voltage large-capacity resistive superconducting current limiter according to claim 2, wherein if the superconducting current limiter is the high-voltage large-capacity superconducting current limiter, one current limiting coil in the superconducting current limiter is selected to perform an impact experiment, and then a complete quench resistance curve is obtained through conversion according to a proportion.
4. The simulation modeling method for the high-voltage large-capacity resistive superconducting current limiter according to claim 3, wherein in step S3, the total heat Q is obtained by adding the heat variation quantity Δ Q in all the calculation time periods.
5. The simulation modeling method for the high-voltage large-capacity resistive superconducting current limiter according to claim 4, wherein in step S4, the resistance value R of the quench resistor corresponding to the total heat Q is found in the quench resistor curve by interpolation.
6. The simulation modeling method for the high-voltage large-capacity resistive superconducting current limiter according to claim 5, wherein when the total heat Q is zero, the resistance value of the corresponding quench resistor on the quench resistor curve is a non-zero value.
7. The simulation modeling method for the high-voltage large-capacity resistive superconducting current limiter according to claim 6, wherein in step S4, the total heat Q is divided by the product of the mass m and the specific heat capacity c of the current limiter to obtain the temperature variation DeltaT, and the temperature variation DeltaT and the reference temperature T of liquid nitrogen are calculatedrefThe summation yields the operating temperature T of the current limiter.
8. The simulation modeling method for the high-voltage large-capacity resistive superconducting current limiter according to claim 7, wherein the mass m and the specific heat capacity c of the current limiter are the specific heat capacity and the mass of the superconducting tape portion of the current limiter.
9. The simulation modeling method for the high-voltage large-capacity resistive superconducting current limiter according to claim 8, wherein in step S5, the heat exchange coefficient h of the liquid nitrogen at the working temperature T is queried by interpolation, and the heat exchange coefficient h is multiplied by the liquid nitrogen contact surface S and the temperature variation Δ T to obtain the second liquid nitrogen heat dissipation power.
10. The high-voltage large-capacity resistive superconducting current limiter simulation modeling device is characterized by comprising a processor and a memory;
the memory is used for storing program codes and transmitting the program codes to the processor;
the processor is used for executing the simulation modeling method of the high-voltage large-capacity resistive superconducting current limiter according to any one of claims 1 to 9 according to instructions in the program code.
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