CN112446125B - Modeling method and device of heat dissipation equivalent model of reactor iron core and test platform - Google Patents
Modeling method and device of heat dissipation equivalent model of reactor iron core and test platform Download PDFInfo
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Abstract
The application provides a modeling method and device for a heat dissipation equivalent model of a reactor iron core and a test platform. The modeling method comprises the following steps: under the conditions of different environmental temperatures and different temperatures of cooling liquid, carrying out multiple temperature rise tests on the saturable reactor iron core, and recording test data of variables of a heat dissipation equivalent equation of the saturable reactor iron core; fitting an equivalent thermal resistance parameter based on the test data of the variable and a heat dissipation equivalent equation; and establishing a heat dissipation equivalent model of the saturable reactor iron core based on the equivalent thermal resistance parameter and the heat dissipation equivalent equation.
Description
Technical Field
The application relates to the technical field of power electronics and power systems, in particular to a modeling method and device and a test platform of a heat dissipation equivalent model.
Background
The saturable reactor is used as core equipment of the direct current converter valve and mainly provides a protection effect on the thyristor. When the thyristor is switched on, the unsaturated inductor is larger, so that the current change rate di/dt can be limited, and the thyristor is protected. When the surge voltage occurs, the reactor bears most of the instantaneous voltage stress, and the voltage change rate dv/dt borne by the thyristor is reduced. After the thyristor is switched on, the iron core of the reactor enters a saturation state, so that the whole reactor presents small inductance, and the reactive loss of the converter valve is reduced.
In the running process of the saturable reactor, certain loss is generated due to the hysteresis effect, the eddy current effect and the like of the iron core of the reactor because positive and negative voltages are periodically born. The loss needs to be dissipated in time, otherwise, the temperature of the iron core is too high, the insulation material around the iron core is accelerated to age, the service life of the iron core is influenced, and even the fault of the reactor is caused.
At present, the modeling of the saturable reactor mainly aims at the modeling of electrical characteristics, and the heat dissipation of an iron core is almost not available. The invention patent CN101975896 provides a reactor thermal equivalent test method, which is used for simulating an actual operation condition by applying specific waveform voltage and current to a reactor, monitoring whether a reactor thermal stable state meets design requirements or not, and does not have an iron core heat dissipation model modeling function. Similar thermal characteristic test devices and test methods thereof are proposed in patent nos. CN106918765 and CN105182123, which utilize a high-frequency power supply to apply voltage to a reactor and simultaneously water cooling is performed by a water system. However, the method can only be used as a method for testing the quality of the reactor product, is poor in control dimension of test variables, is rough and simple, and cannot complete equivalent thermal resistance modeling.
Disclosure of Invention
The embodiment of the application provides a modeling method of a heat dissipation equivalent model of a saturable reactor iron core, which comprises the following steps: under the conditions of different environmental temperatures and cooling liquid temperatures, carrying out multiple temperature rise tests on the saturable reactor iron core, and recording test data of variables of a heat dissipation equivalent equation of the saturable reactor iron core; fitting an equivalent thermal resistance parameter based on the test data of the variable and the heat dissipation equivalent equation; and establishing a heat dissipation equivalent model of the saturable reactor iron core based on the equivalent thermal resistance parameter and the heat dissipation equivalent equation.
According to some embodiments, the method further comprises: designing a heat dissipation equivalent equation of the saturable reactor iron core based on heat dissipation parameters of the saturable reactor iron core, wherein the heat dissipation parameters comprise equivalent thermal resistance parameters.
According to some embodiments, the performing a plurality of temperature rise tests on the saturable reactor core comprises: and carrying out multiple temperature rise tests on the saturable reactor iron core under different powers.
According to some embodiments, the experimental data for the variables comprises: the maximum temperature of the iron core, the ambient temperature, the temperature of the cooling liquid, the heat dissipation power of the cooling liquid of the iron core, the air heat dissipation power of the iron core and the total heating power of the iron core.
According to some embodiments, the heat dissipation equivalent equation is:
wherein, TcMaximum temperature of iron core, TwFor the coolant temperature, TaIs ambient temperature, RwEquivalent thermal resistance, R, of cooling liquid heat dissipation of iron coreaThe equivalent thermal resistance of air heat dissipation of the iron core, and P is the total heat dissipation power of the iron core.
According to some embodiments, fitting an equivalent thermal resistance parameter based on the experimental data of the variables and the heat dissipation equivalence equation comprises: and fitting the equivalent thermal resistance parameters by using a least square method or a maximum likelihood estimation method based on the test data of the variables and the heat dissipation equivalent equation.
According to some embodiments, the equivalent thermal resistance parameter comprises: the equivalent thermal resistance of the cooling liquid heat dissipation of the iron core and the equivalent thermal resistance of the air heat dissipation of the iron core.
According to some embodiments, the saturable reactor core heat dissipation equivalent model is:
wherein, TcMaximum temperature of iron core, TwFor the cooling liquid temperature, TaIs ambient temperature, PwCooling liquid heat dissipation power, R, for the iron corewIs equivalent thermal resistance, P, of cooling liquid heat dissipation of iron coreaAir heat dissipation power, R, for iron coreaThe equivalent thermal resistance of air heat dissipation of the iron core is shown, and P is the total heat dissipation power of the iron core.
The embodiment of the application further provides a test platform for the saturable reactor iron core, which comprises a power applying unit, a cooling liquid circulating unit, a test unit and a measuring and recording unit, wherein the power applying unit is configured to apply different powers to the saturable reactor iron core; the cooling liquid circulation unit is configured to provide cooling liquid circulation for the saturable reactor core; the test unit is configured to simulate the saturable reactor to perform multiple temperature rise tests on one or more saturable reactor iron cores under different environmental temperatures and coolant temperatures; the measurement and recording unit is configured to measure and record test data of variables of the heat dissipation equivalent equation of the saturable reactor core.
According to some embodiments, the measurement and recording unit comprises a fiber optic temperature sensor for measuring the maximum temperature of the saturable reactor core.
According to some embodiments, the test unit comprises a closed constant temperature box, and the closed constant temperature box has a refrigerating function and a heating function and is used for simulating the operating environment condition of the saturable reactor and performing multiple temperature rise tests on one or more saturable reactor iron cores under different powers.
The embodiment of the present application further provides a modeling apparatus for a heat dissipation equivalent model of a saturable reactor iron core, including: the fitting unit fits the equivalent thermal resistance parameter based on the test data of the variable of the heat dissipation equivalent equation and the heat dissipation equivalent equation; and the modeling unit establishes a heat dissipation equivalent model of the saturable reactor iron core based on the equivalent thermal resistance parameter and the heat dissipation equivalent equation.
According to some embodiments, the device further comprises a design unit, wherein the design unit designs the heat dissipation equivalent equation of the saturable reactor core based on heat dissipation parameters of the saturable reactor core, and the heat dissipation parameters comprise equivalent thermal resistance parameters.
According to the technical scheme provided by the embodiment of the application, the saturated reactor iron core radiation model is established, test data are collected in a targeted mode under different working conditions, key parameters in the fitted radiation model are accurate, and the reactor design has great reference significance.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic flowchart of a modeling method of a heat dissipation equivalent model of a saturable reactor core according to an embodiment of the present application;
fig. 2 is a schematic diagram of a saturated reactor iron core heat dissipation equivalent thermal resistance model provided in an embodiment of the present application;
fig. 3 is a schematic flowchart of a modeling method of another equivalent heat dissipation model of a saturable reactor core according to an embodiment of the present application;
fig. 4 is a functional component block diagram of a test platform of a saturable reactor core provided in an embodiment of the present application;
fig. 5 is a functional component block diagram of a modeling device of a heat dissipation equivalent model of a saturable reactor core according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, specific embodiments of the technical solutions of the present application will be described in more detail and clearly with reference to the accompanying drawings and the embodiments. However, the specific embodiments and examples described below are for illustrative purposes only and are not intended to limit the present application. It is intended that the present disclosure includes only some embodiments and not all embodiments, and that all other embodiments and modifications within the scope of the present disclosure will be suggested to those skilled in the art.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
The saturable reactor is used as core equipment of the direct current converter valve and mainly provides a protection effect for the thyristor. When the thyristor is switched on, the unsaturated inductor is larger, so that the current change rate di/dt can be limited, and the thyristor is protected. When the surge voltage occurs, the reactor bears most of the instantaneous voltage stress, and the voltage change rate dv/dt borne by the thyristor is reduced. After the thyristor is switched on, the iron core of the reactor enters a saturation state, so that the whole reactor presents small inductance, and the reactive loss of the converter valve is reduced.
In the running process of the saturable reactor, certain loss is generated by the hysteresis effect, the eddy current effect and the like of the iron core of the reactor due to the periodic positive and negative voltage bearing. The loss needs to be dissipated in time, otherwise, the temperature of the iron core is too high, the insulation material around the iron core is accelerated to age, the service life of the iron core is influenced, and even the fault of the reactor is caused. The coil of the reactor is composed of hollow aluminum tubes, and the heat is directly taken away by introducing cooling liquid, so that the temperature rise is small. The iron core is sleeved on the coil, and insulating and semi-conducting materials are arranged between the iron core and the coil, so that the partial discharge level is reduced while the iron core is insulated. Simultaneously, in order to reduce the iron core noise, alleviate the iron core vibration, improve structural strength, iron core and coil wholly can encapsulate in insulating elastomer. Thus, the core is not in direct contact with air nor with the coolant, and there is not little thermal resistance in the heat dissipation path.
In order to reduce the maximum temperature of the iron core when the reactor operates, the most essential way is to reduce the thermal resistance of heat transfer to air and water when the iron core dissipates heat. Through a proper modeling method, the corresponding equivalent thermal resistance can be obtained by utilizing the measured data to calculate and fit, and the equivalent thermal resistance is used for guiding the product design and verifying the product performance.
The saturable reactor iron core heat dissipation model is designed, and the key parameters in the heat dissipation model are fitted through the test data of the reactor under different working conditions, so that the complete establishment of the model is completed, and the model is used for guiding the design of the reactor. Meanwhile, the method is implemented by proposing a corresponding test platform scheme.
Fig. 1 is a schematic flow chart of a modeling method of a heat dissipation equivalent model of a saturable reactor core according to an embodiment of the present application.
Referring to fig. 1, in S110, under different ambient temperature and coolant temperature conditions, a plurality of temperature rise tests are performed on the saturable reactor core, and test data of variables of the heat dissipation equivalent equation of the saturable reactor core are recorded.
According to some embodiments, the heat dissipation equivalence equation is as follows.
Wherein, TcMaximum temperature of iron core, TwFor the cooling liquid temperature, TaIs ambient temperature, RwEquivalent thermal resistance, R, of heat dissipation of cooling liquid for iron coreaThe equivalent thermal resistance of air heat dissipation of the iron core is shown, and P is the total heat dissipation power of the iron core. The cooling liquid in this embodiment is cooling water, but not limited thereto.
And determining the test data according to the variable related to the heat dissipation equivalent equation. And carrying out multiple temperature rise tests on the saturable reactor iron core under different powers, and recording test data of variables related to the heat dissipation equivalent equation. The variables of the heat dissipation equivalent equation include: maximum temperature T of iron corecAmbient temperature TaTemperature T of the coolantwAnd the total heat dissipation power P of the iron core. The total heat dissipation power P of the iron core can be determined according to the heat dissipation power P of the cooling liquid of the iron corewAir heat dissipation power P of iron coreaIs obtained by the sum of (a).
Referring to fig. 1, in S120, an equivalent thermal resistance parameter is fitted based on the heat dissipation equivalent equation and test data of variables of the heat dissipation equivalent equation.
The equivalent thermal resistance parameter comprises the equivalent thermal resistance R of the cooling liquid heat dissipation of the iron corewEquivalent thermal resistance R of air heat dissipation of iron corea. By using equivalent equation of heat dissipation, passing through the maximum temperature T of the iron corecCoolant temperature TwAmbient temperature TaAnd the total heat dissipation power P of the iron core, and calculating the equivalent heat resistance R of the heat dissipation of the cooling liquid of the iron core in a fitting mannerwEquivalent thermal resistance R of air heat dissipation of iron corea。
Referring to fig. 1, in S130, a heat dissipation equivalent model of the saturable reactor core is established based on the equivalent thermal resistance parameter and the heat dissipation equivalent equation.
And establishing the following saturable reactor iron core heat dissipation equivalent model according to a heat dissipation equivalent equation.
Wherein, TcMaximum temperature of iron core, TwFor the cooling liquid temperature, TaIs ambient temperature, PwCooling liquid heat dissipation power, R, for the iron corewEquivalent thermal resistance, P, for heat dissipation of the cooling liquid of the iron coreaAir heat dissipation power, R, for iron coreaThe equivalent thermal resistance of air heat dissipation of the iron core, and P is the total heat dissipation power of the iron core.
Wherein, the equivalent thermal resistance R of the cooling liquid heat dissipation of the iron corewEquivalent thermal resistance R of air heat dissipation of iron coreaFor the known number obtained by fitting, the saturated reactor iron core heat dissipation equivalent model embodies the maximum temperature T of the iron corecAnd the total heat dissipation power P and the ambient temperature T of the independent variable iron coreaTemperature T of the coolantwThe total heat dissipation power P of the iron core can be determined according to the heat dissipation power P of the cooling liquid of the iron corewAir heat dissipation power P of iron coreaIs obtained by the sum of (a). As shown in fig. 2, fig. 2 is a schematic diagram of a saturated reactor iron core heat dissipation equivalent thermal resistance model according to an embodiment of the present application.
According to the technical scheme provided by the embodiment, the saturated reactor iron core heat dissipation model is established, test data are collected in a targeted mode under different working conditions, key parameters in the fitted heat dissipation model are accurate, and the reactor design method has great reference significance.
Fig. 3 is a schematic flow chart of another modeling method of a heat dissipation equivalent model of a saturable reactor core according to an embodiment of the present application.
Referring to fig. 3, in S200, a heat dissipation equivalent equation of the saturable reactor core is designed based on heat dissipation parameters of the saturable reactor core, where the heat dissipation parameters include equivalent thermal resistance parameters.
According to some embodiments, the heat dissipation equivalence equation for designing a saturable reactor core is as follows.
Wherein, TcMaximum temperature of iron core, TwFor the coolant temperature, TaIs ambient temperature, RwEquivalent thermal resistance, R, of cooling liquid heat dissipation of iron coreaThe equivalent thermal resistance of air heat dissipation of the iron core, and P is the total heat dissipation power of the iron core. The cooling liquid in this embodiment is cooling water, but not limited thereto.
Optionally, the heat dissipation equivalent equation can be further refined through parameters such as the flow rate of the cooling liquid or/and the wind speed of the ambient air.
Referring to fig. 3, in S210, a temperature rise test is performed on the saturable reactor core for multiple times under different ambient temperature and coolant temperature conditions, and test data of variables of a heat dissipation equivalent equation of the saturable reactor core is recorded.
According to some embodiments, the experimental data is determined from variables related to the heat dissipation equivalence equation. Multiple temperature rise tests are carried out on the saturable reactor iron core under different powers, and environmental conditions including air temperature, humidity, wind speed and the like can be adjusted. And recording test data of variables related to the heat dissipation equivalent equation. The variables of the heat dissipation equivalent equation include: maximum temperature T of iron corecAmbient temperature TaTemperature T of the coolantwAnd the total heat dissipation power P of the iron core. The total heat dissipation power P of the iron core can be determined according to the heat dissipation power P of the cooling liquid of the iron corewAir heat dissipation power P of iron coreaIs obtained by the sum of (a). The test data includes test data for these variables.
Referring to fig. 3, in S220, the equivalent thermal resistance parameter is fitted using a least square method or a maximum likelihood estimation method based on the experimental data of the variables of the heat dissipation equivalent equation and the heat dissipation equivalent equation.
According to some embodiments, least squares (also known as least squares) is a mathematical optimization technique. It finds the best functional match of the data by minimizing the sum of the squares of the errors. The unknown data can be easily obtained by the least square method, and the sum of squares of errors between the obtained data and actual data is minimized. The least squares method may be used for curve fitting.
The equivalent thermal resistance parameter comprises the equivalent thermal resistance R of the cooling liquid heat dissipation of the iron corewEquivalent thermal resistance R of air heat dissipation of iron corea. And fitting the equivalent thermal resistance parameter by using a least square method based on the test data of the variable of the heat dissipation equivalent equation and the heat dissipation equivalent equation.
According to some embodiments, the least square method may be replaced by a maximum likelihood estimation method, and is not limited thereto.
Referring to fig. 3, in S230, a heat dissipation equivalent model of the saturable reactor core is established based on the equivalent thermal resistance parameter and the heat dissipation equivalent equation.
And establishing the following saturated reactor iron core heat dissipation equivalent model according to the heat dissipation equivalent equation.
Wherein, TcMaximum temperature of iron core, TwFor the cooling liquid temperature, TaIs ambient temperature, PwCooling liquid heat dissipation power, R, for the iron corewEquivalent thermal resistance, P, for heat dissipation of the cooling liquid of the iron coreaAir heat dissipation power, R, for iron coreaThe equivalent thermal resistance of air heat dissipation of the iron core is shown, and P is the total heat dissipation power of the iron core.
Equivalent thermal resistance R of cooling liquid heat dissipation of iron corewEquivalent thermal resistance R of air heat dissipation of iron coreaFor the known number obtained by fitting, the saturated reactor iron core heat dissipation equivalent model reflects the maximum temperature T of the iron corecAnd iron core assemblyHeat dissipation power P, coolant temperature TwCooling liquid heat radiation power P of iron corewAir heat dissipation power P of iron coreaAnd ambient temperature TaThe relationship (c) in (c).
According to the technical scheme provided by the embodiment, the heat dissipation equivalent equation of the saturable reactor iron core can be designed according to the actual situation, the reactor working environment condition is simulated really, and the established model is more accurate and better guides the design of the reactor.
Fig. 4 is a functional block diagram of a test platform of a saturable reactor core according to an embodiment of the present application.
Referring to fig. 4, the testing platform 100 for the saturable reactor core includes a power application unit 10, a cooling liquid circulation unit 20, a testing unit 30, and a measuring and recording unit 40.
The power applying unit 10 is configured to apply different powers to the saturable reactor core. The coolant circulation unit 20 is configured to provide coolant circulation to the saturable reactor core. The test unit 30 is configured to simulate the saturable reactor to perform a plurality of temperature rise tests on the saturable reactor core under different environmental temperature and coolant temperature conditions. The measurement and recording unit 40 is configured to measure and record test data of variables of the heat dissipation equivalent equation of the saturable reactor core.
According to some embodiments, the measurement and recording unit 40 comprises a fiber optic temperature sensor 41 for measuring the maximum temperature of the saturable reactor core. The test unit 30 comprises a closed thermostat 31, has the functions of refrigerating and heating, and is used for simulating the operating environment condition of the saturable reactor and performing multiple temperature rise tests on the iron core of the saturable reactor under different powers.
Each unit is provided with at least one channel, and test data can be measured on at least one saturable reactor at the same time so as to fit equivalent thermal resistance parameters. The measurement can be simultaneously carried out on a plurality of saturable reactors.
Fig. 5 is a functional component block diagram of a modeling device of a heat dissipation equivalent model of a saturable reactor core according to an embodiment of the present application.
Referring to fig. 5, the modeling apparatus of the heat dissipation equivalent model of the saturable reactor core includes a test platform 100 of the saturable reactor core, a fitting unit 200, and a modeling unit 300.
According to some embodiments, the fitting unit 200 fits the equivalent thermal resistance parameter based on the experimental data of the variables and the heat dissipation equivalent equation. The modeling unit 300 establishes a heat dissipation equivalent model of the saturable reactor core based on the equivalent thermal resistance parameter and the heat dissipation equivalent equation.
Optionally, the modeling apparatus for the heat dissipation equivalent model of the saturable reactor core further includes a design unit.
The design unit is used for designing a heat dissipation equivalent equation of the saturable reactor iron core based on heat dissipation parameters of the saturable reactor iron core, wherein the heat dissipation parameters comprise equivalent thermal resistance parameters.
It should be noted that each of the embodiments described above with reference to the drawings is only intended to illustrate the present application and not to limit the scope of the present application, and those skilled in the art should understand that modifications and equivalent substitutions made on the present application without departing from the spirit and scope of the present application should be covered in the scope of the present application. Furthermore, unless the context indicates otherwise, words that appear in the singular include the plural and vice versa. Additionally, all or a portion of any embodiment may be utilized with all or a portion of any other embodiment, unless stated otherwise.
Claims (12)
1. A modeling method of a heat dissipation equivalent model of a saturable reactor iron core comprises the following steps:
under the conditions of different environmental temperatures and different temperatures of cooling liquid, carrying out multiple temperature rise tests on the saturable reactor iron core, and recording test data of variables of a heat dissipation equivalent equation of the saturable reactor iron core;
fitting an equivalent thermal resistance parameter based on the test data of the variable and the heat dissipation equivalent equation;
establishing a heat dissipation equivalent model of the saturable reactor iron core based on the equivalent thermal resistance parameter and the heat dissipation equivalent equation, wherein the heat dissipation equivalent equation is as follows:
wherein, TcMaximum temperature of iron core, TwFor the cooling liquid temperature, TaIs ambient temperature, RwEquivalent thermal resistance, R, of heat dissipation of cooling liquid for iron coreaThe equivalent thermal resistance of air heat dissipation of the iron core, and P is the total heat dissipation power of the iron core.
2. The method of claim 1, further comprising:
designing a heat dissipation equivalent equation of the saturable reactor iron core based on heat dissipation parameters of the saturable reactor iron core, wherein the heat dissipation parameters comprise equivalent thermal resistance parameters.
3. The method of claim 1, wherein the performing a plurality of temperature rise tests on the saturable reactor core comprises:
and carrying out multiple temperature rise tests on the saturable reactor iron core under different powers.
4. The method of claim 1, wherein the experimental data for the variables comprises: the maximum temperature of the iron core, the ambient temperature, the temperature of the cooling liquid, the heat dissipation power of the cooling liquid of the iron core, the air heat dissipation power of the iron core and the total heating power of the iron core.
5. The method of claim 1, wherein fitting an equivalent thermal resistance parameter based on the experimental data for the variables and the heat dissipation equivalence equation comprises:
and fitting the equivalent thermal resistance parameter by using a least square method or a maximum likelihood estimation method based on the test data of the variable and the heat dissipation equivalent equation.
6. The method of claim 1, wherein the equivalent thermal resistance parameter comprises: the equivalent thermal resistance of the cooling liquid heat dissipation of the iron core and the equivalent thermal resistance of the air heat dissipation of the iron core.
7. The method of claim 1, wherein the saturable reactor core heat dissipation equivalent model is:
wherein, TcMaximum temperature of iron core, TwFor the cooling liquid temperature, TaIs ambient temperature, PwCooling liquid heat dissipation power, R, for the iron corewIs equivalent thermal resistance, P, of cooling liquid heat dissipation of iron coreaAir heat dissipation power, R, for iron coreaThe equivalent thermal resistance of air heat dissipation of the iron core, and P is the total heat dissipation power of the iron core.
8. A test platform of saturable reactor iron core includes:
the power applying unit is configured to apply different powers to the saturable reactor core;
a cooling liquid circulation unit configured to provide cooling liquid circulation to the saturable reactor core;
the testing unit is configured to be used for simulating the saturable reactor to carry out multiple temperature rise tests on one or more saturable reactor iron cores under different environmental temperature and cooling liquid temperature conditions;
the measurement and recording unit is configured to measure and record test data of variables of a heat dissipation equivalent equation of the saturable reactor iron core, wherein the heat dissipation equivalent equation is as follows:
wherein, TcMaximum temperature of iron core, TwFor the cooling liquid temperature, TaIs ambient temperature, RwEquivalent thermal resistance, R, of cooling liquid heat dissipation of iron coreaThe equivalent thermal resistance of air heat dissipation of the iron core is shown, and P is the total heat dissipation power of the iron core.
9. The test platform of claim 8, wherein said measurement and recording unit comprises:
and the optical fiber temperature sensor is used for measuring the highest temperature of the saturable reactor iron core.
10. The testing platform of claim 8, wherein said testing unit comprises:
and the closed constant temperature box has the functions of refrigeration and heating, and is used for simulating the working environment conditions of the saturable reactor and carrying out multiple temperature rise tests on one or more saturable reactor iron cores under different powers.
11. A modeling device for a heat dissipation equivalent model of a saturable reactor core comprises:
a test platform for a saturable reactor core according to any one of claims 8 to 10;
the fitting unit is used for fitting equivalent thermal resistance parameters based on the test data of the variables of the heat dissipation equivalent equation and the heat dissipation equivalent equation;
and the modeling unit is used for establishing a heat dissipation equivalent model of the saturable reactor iron core based on the equivalent thermal resistance parameter and the heat dissipation equivalent equation.
12. The apparatus of claim 11, further comprising:
the design unit is used for designing the heat dissipation equivalent equation of the saturable reactor iron core based on the heat dissipation parameters of the saturable reactor iron core, and the heat dissipation parameters comprise equivalent thermal resistance parameters.
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