Analog test system and method for 10kv high-voltage coal mining machine electric control box and medium

Abstract

The application relates to the technical field of coal mining machines, and discloses a simulation test system, a simulation test method and a medium for a 10Kv high-voltage coal mining machine electric control box, which comprises the following modules: a voltage simulation module that outputs simulation voltage; a cable parameter simulation module that outputs corresponding target cable parameters to the coal mining machine electric control box to be tested according to target cable parameter instructions output by a control module, so as to simulate different power supply cable characteristics; a load simulation module that outputs corresponding target load parameters to the coal mining machine electric control box to be tested according to target load parameter instructions output by the control module, so as to simulate the load of each loop; a measurement module that collects simulation voltage information of the voltage simulation module, load current information of the load simulation module and temperature information of the coal mining machine electric control box to be tested; and the control module that coordinates the operation of the modules and outputs control instructions. Through the technical scheme, the temperature rise and surface temperature of the electric control box can be effectively tested.

Description

Technical Field

[0001] This invention relates to the field of coal mining machine technology, and in particular to a simulation test system, method and medium for the electrical control box of a 10kV high-voltage coal mining machine. Background Technology

[0002] As the core equipment in fully mechanized coal mining faces, the coal mining machine's electrical control box integrates frequency converters, power frequency control circuits, protection units, and various electrical components, undertaking the critical functions of power supply control and equipment protection. Under long-term high voltage, high current, strong load variations, and complex operating conditions, the temperature rise level of the internal components and the surface temperature of the outer casing of the electrical control box directly determine the safety, reliability, and service life of the equipment, making them key testing indicators in coal mine safety supervision and product type testing.

[0003] As coal mines develop towards higher power, higher efficiency, and higher voltage levels, the power supply voltage level of coal mining machines has gradually increased from the traditional 3.3kV to 10kV. Compared to 3.3kV coal mining machines, 10kV coal mining machines use higher voltage levels in the cutting, pumping, and traction circuits. The electrical topology, component selection, insulation level, and heat dissipation characteristics inside their control boxes have all changed significantly. In particular, the frequency converter circuits widely adopt multi-power unit cascade structures, resulting in a more complex system operation and placing higher demands on temperature rise and thermal management.

[0004] Currently, the industry faces the following technical bottlenecks in testing the temperature rise and surface temperature of 10kV high-voltage coal mining machine control boxes: First, traditional direct load simulation tests require multiple sets of high-voltage motors or auxiliary devices, resulting in high construction costs, significant safety risks, and difficulty in conducting them flexibly in conventional testing environments. Second, while semi-direct load simulation tests reduce costs, they use impedance loads instead of actual motors, leading to incomplete simulations and failing to accurately reflect actual operating characteristics such as load dynamics and power factor fluctuations. Third, indirect simulation tests break down the control box into multiple circuits for individual testing, lacking the true electrical coupling relationship of the entire machine operating in tandem, making it difficult to accurately simulate the temperature rise distribution when multiple circuits are operating simultaneously. Furthermore, existing testing methods generally suffer from insufficient flexibility in adjusting operating conditions, making it impossible to finely adjust key factors such as cable parameters and load characteristics, thus limiting the guiding value of test results for product design.

[0005] Currently, the industry mainly adopts the following testing methods for verifying the operational performance and conducting temperature rise tests on the electrical control boxes of coal mining machines, especially those of high-pressure coal mining machines.

[0006] The first method is the direct load simulation test method.

[0007] This method typically employs a high-voltage power supply system that is identical or nearly identical to the operating conditions of an actual coal mining machine. The electrical control box of the coal mining machine under test is directly connected to a power supply with a rated voltage level (such as 3.3kV or 10kV), and a high-voltage motor or motor-generator coupled with the same specifications as the actual equipment is configured as the load. By controlling the power frequency circuit and the frequency converter circuit to drive the load, the electrical control box operates under conditions close to those of the actual machine, thereby completing the testing of performance indicators such as temperature rise, surface temperature, and operational stability. In this method, the frequency converter circuit typically simulates the load of the traction circuit by adjusting the generator excitation current or the loading device.

[0008] The second method is the semi-direct load simulation test method.

[0009] This method still uses a high-voltage power supply connected to the control box on the power supply side, but simplifies some circuits on the load side. For example, in the cutting or pumping circuit, a high-voltage resistor or impedance load is used instead of the actual high-voltage motor to simulate the current and power characteristics of the power frequency circuit; while for traction and other frequency conversion circuits, a motor or a drag asynchronous motor structure is still used for loading. Through the combination and configuration of different types of loads, the control box can cover several typical operating conditions under test conditions.

[0010] The third method is indirect simulation or equivalent loading test.

[0011] This approach typically avoids conducting a unified test on the entire electrical control box system under full voltage and full power conditions. Instead, it applies equivalent loading to components such as the power frequency circuit and main circuit using a low-voltage, high-current method, while key components like the frequency converter and phase-shifting transformer are tested individually or as subsystems. By using a segmented circuit and modular approach, the temperature rise test and functional verification of the electrical control box are completed, thereby reducing the difficulty of building the test platform and the operational risks.

[0012] Existing technologies primarily utilize methods such as direct actual load application, partial loop equivalent loading, or indirect subsystem simulation to test and verify the electrical control box of a coal mining machine. While these methods can achieve basic performance testing of the control box to a certain extent, their test structures, load configurations, and operating condition simulation methods differ significantly.

[0013] Although the existing testing methods can complete the functional verification and operational testing of the coal mining machine's electrical control box to a certain extent, the following defects and deficiencies still exist in the simulation test of temperature rise and surface temperature of the 10kV high-voltage coal mining machine's electrical control box.

[0014] First, the direct load simulation test method has the problems of high test cost, high risk and high implementation difficulty.

[0015] This method requires configuring multiple sets of high-voltage motors or motor-generator pairs that match the specifications of the actual equipment, and demands that the test platform possess complete high-voltage power supply and protection capabilities. With the voltage level increasing to 10kV, the number of motors, power capacity, and insulation class required for the test system increase significantly, not only leading to a substantial increase in construction and operating costs, but also increasing the risk of high-voltage electrical safety accidents should any abnormalities occur during the test. Furthermore, this method places high demands on the test site, power supply conditions, and personnel qualifications, making it difficult to implement flexibly in conventional testing or R&D environments.

[0016] Secondly, the semi-direct load simulation test method is insufficient in terms of the completeness and consistency of the operating condition simulation.

[0017] This method, by replacing the actual motor with an impedance load in some circuits, reduces testing costs to some extent. However, because different circuits use different types of loads, their electrical characteristics still differ from the actual operating conditions of the coal mining machine, especially in terms of load dynamic changes, power factor fluctuations, and nonlinear characteristics. As a result, the voltage, current, and thermal stress distribution experienced by the electrical control box during the test deviates from the actual underground operating conditions, affecting the accuracy and reliability of the temperature rise and surface temperature test results.

[0018] Furthermore, indirect simulation or equivalent loading tests cannot accurately reflect the overall machine's coordinated operation status.

[0019] This method typically involves breaking down the electrical control box system into multiple circuits or modules for separate testing, using low-voltage, high-current or subsystem loading to complete the temperature rise test. However, due to the lack of a unified high-voltage power supply environment and realistic electrical coupling between the circuits, it is difficult to simulate the simultaneous operation and mutual influence of each circuit during actual coal mining machine operation. In particular, it cannot reflect the overall temperature rise and surface temperature changes of the electrical control box under conditions such as voltage fluctuations and sudden load changes.

[0020] In addition, existing testing methods generally suffer from insufficient flexibility in adjusting operating conditions.

[0021] Most existing solutions struggle to finely and continuously adjust key factors such as cable parameters, load characteristics, and voltage fluctuation range during testing. They often only cover a limited number of typical operating conditions and cannot systematically simulate the actual working state of coal mining machines under different power supply distances, different load combinations, and complex operating conditions. This limits the guiding value of test results for product design and optimization.

[0022] In summary, existing technologies are insufficient in terms of safety, economy, realism of operating conditions, and flexibility of adjustment, making it difficult to meet the comprehensive requirements of "realistic simulation, controllable adjustment, and safe implementation" for the temperature rise and surface temperature test of the 10kV high-voltage coal mining machine control box.

[0023] Therefore, there is an urgent need for a test system and method that can realistically simulate the actual operating conditions of a 10kV coal mining machine electrical control box under safe and controllable conditions, in order to solve the problems of high test costs, high safety risks, unrealistic operating condition simulation and insufficient adjustment flexibility in the existing technology, and meet the test requirements in the research, development, testing and certification process of high-voltage coal mining machine electrical control equipment. Summary of the Invention

[0024] This invention provides a simulation test system, method, and medium for the electrical control box of a 10kV high-voltage coal mining machine, aiming to solve the technical problems existing in related technologies, such as high test costs, high safety risks, unrealistic working condition simulation, and insufficient adjustment flexibility.

[0025] In a first aspect, embodiments of the present invention provide a simulation test system for the electrical control box of a 10kV high-voltage coal mining machine, the system comprising: Voltage simulation module, cable parameter simulation module, load simulation module, measurement module, and control module; The voltage simulation module is used to output analog voltage; The cable parameter simulation module is connected to the voltage simulation module, the input side of the coal mining machine control box under test, and the control module. It is used to output the corresponding target cable parameters to the coal mining machine control box under test according to the target cable parameter command issued by the control module, so as to simulate the characteristics of different power supply cables. The load simulation module is connected to the output side of the electrical control box of the coal mining machine under test and the control module. It is used to output the corresponding target load parameters to the electrical control box of the coal mining machine under test according to the target load parameter command issued by the control module, so as to simulate the load of each circuit. The measurement module is connected to the voltage simulation module, the input side of the electrical control box of the coal mining machine under test, and the load simulation module, and is used to collect the analog voltage information of the voltage simulation module, the load current information of the load simulation module, and the temperature information of the electrical control box of the coal mining machine under test. The control module is connected to and controls the voltage simulation module, the electrical control box of the coal mining machine under test, the cable parameter simulation module, and the load simulation module, respectively, and is used to coordinate the operation of each module and output control commands.

[0026] In one embodiment, optionally, the voltage simulation module includes: a rectifier, an inverter, a counter-drive asynchronous motor, and a voltage simulator; The rectifier has an input terminal connected to the external power grid and an output terminal connected to the input terminal of the inverter, and is used to provide DC power to the inverter. The inverter, with its output connected to the asynchronous motor, is used to convert DC power into AC power with adjustable frequency to drive the motor. The asynchronous motor is connected to the voltage simulator and includes a motor and a generator. The motor is connected to the output of the inverter, and the generator is used to generate electricity under the drive of the motor. The voltage simulator is connected to the output terminal of the generator and is used to adjust the generator output voltage to generate the simulated voltage.

[0027] In one embodiment, optionally, the cable parameter simulation module includes: a cable parameter simulator group and a circuit breaker group; The cable parameter simulator group includes a first cable parameter simulator, a second cable parameter simulator, and a third cable parameter simulator, which correspond to different circuits of the electrical control box of the coal mining machine under test, including a cutting circuit, a pumping circuit, and a traction circuit. They are used to simulate different power supply distances and cable characteristics by adjusting resistance, inductance, and capacitance parameters. The circuit breaker group is connected between the cable parameter simulator group and the electrical control box of the coal mining machine under test, and is used to control the connection and disconnection of each circuit.

[0028] In one embodiment, optionally, the load simulation module includes: a load simulator group, the load simulator group including an impedance simulation load and a nonlinear simulation load; The impedance simulation load is connected to the cutting circuit and pumping circuit of the electrical control box of the coal mining machine under test, and is used to simulate the linear load characteristics of the power frequency circuit of the electrical control box of the coal mining machine under test. The nonlinear analog load is connected to the traction circuit of the electrical control box of the coal mining machine under test, and is used to simulate the nonlinear load characteristics of the frequency conversion circuit of the electrical control box of the coal mining machine under test.

[0029] In one embodiment, optionally, the load simulation module further includes: an energy feedback line; The energy feedback line is connected to the output of the load simulation module and the input of the voltage simulation module, and is used to feed the electrical energy output by the load simulator group back to the input of the inverter for recycling.

[0030] In one embodiment, optionally, the measurement module includes: a voltage acquisition unit, a current acquisition unit, and a temperature acquisition unit; The voltage acquisition unit is located on the output side of the voltage simulation module and the input side of the electrical control box of the coal mining machine under test, and is used to acquire analog voltage information. The current acquisition unit is installed in the loop of the load simulation module and is used to acquire current information during the operation of the load. The temperature acquisition unit is installed on the surface and at key internal locations of the electrical control box of the coal mining machine under test, and is used to collect surface temperature information and internal component temperature rise information of the electrical control box.

[0031] In one embodiment, optionally, the control module is configured as follows: Send voltage adjustment commands to the voltage simulation module to simulate different voltage levels and fluctuating operating conditions; Send cable parameter configuration instructions to the cable parameter simulation module to simulate different power supply distances and cable characteristics; Send load parameter adjustment commands to the load simulation module to simulate different load combinations and changing operating conditions; It receives data collected by the measurement module and performs real-time analysis and storage of the test data.

[0032] Secondly, embodiments of the present invention provide a method for simulating temperature rise and surface temperature of a 10kV high-voltage coal mining machine control box, used in the simulation test system described in any one of the first embodiments above, the method comprising: The voltage simulation module generates a target simulated voltage to simulate the actual power supply conditions of the coal mining machine. The target cable parameters are configured using the cable parameter simulation module to simulate different power supply distances and cable characteristics; The target load parameters are configured through the load simulation module to simulate the actual load of each circuit of the coal mining machine. The control module controls the operation of the electrical control box of the coal mining machine under test under different simulated working conditions, and the measurement module synchronously collects voltage, current and temperature information. The temperature rise and surface temperature characteristics of the electrical control box of the coal mining machine under test are calculated based on the collected temperature information.

[0033] In one embodiment, optionally, the step of generating the target simulated voltage through the voltage simulation module includes: The motor that drives the asynchronous motor is operated by the rectifier and inverter. The generator of the asynchronous motor generates electricity, which is then regulated by the voltage simulator and output as a target simulated voltage. The step of configuring the target load parameters through the load simulation module includes: The impedance-simulated load device simulates the characteristics of a linear load. The nonlinear load characteristics are simulated using the aforementioned nonlinear analog load device; The energy feedback circuit enables the feedback and reuse of electrical energy from the load.

[0034] Thirdly, embodiments of the present invention provide a computer-readable storage medium storing computer-executable instructions, which are used to execute the temperature rise and surface temperature simulation test method for the electrical control box of a 10kV high-voltage coal mining machine as described in any of the embodiments of the second aspect above.

[0035] The above technical solution integrates voltage simulation, cable parameter simulation, load simulation, measurement, and control modules into a unified test architecture, achieving comprehensive, accurate, and controllable simulation of the test conditions of the 10kV high-voltage coal mining machine control box. The control module, as the core control unit, can coordinate the output of control commands and synchronously adjust the operating status and parameters of each simulation module, ensuring collaborative operation. The voltage simulation module can stably output simulated voltages that conform to actual operating conditions, providing a reliable high-voltage power supply simulation foundation for the test. The cable parameter simulation module can flexibly output corresponding target cable parameters according to control commands, accurately simulating line characteristics under different power supply conditions. The load simulation module can match… The power distribution control box outputs target load parameters for different circuits to recreate the load state of the coal mining machine in actual operation. The measurement module simultaneously collects key data such as voltage, current, and control box temperature, providing comprehensive support for test analysis. The synergistic effect of these modules effectively solves the shortcomings of traditional testing methods that cannot simultaneously ensure the realism of operating condition simulation, test safety, and operational flexibility. It eliminates the need to rely on actual coal conditions or large-scale high-voltage loads, reducing test costs and safety risks. At the same time, it improves the accuracy and reliability of the control box temperature rise and surface temperature test results, meeting the needs of multiple scenarios such as R&D, testing, and type testing of 10kV high-voltage coal mining machine control boxes, and providing strong data support for product design optimization and safety certification. Attached Figure Description

[0036] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 A schematic block diagram of a simulation test system for a 10kV high-voltage coal mining machine control box is shown according to an embodiment of the present invention.

[0038] Figure 2 A graphical representation of a simulation test system for a 10kV high-voltage coal mining machine control box, according to an embodiment of the present invention, is shown.

[0039] Figure 3 A flowchart of a method for simulating temperature rise and surface temperature of a 10kV high-voltage coal mining machine control box according to an embodiment of the present invention is shown.

[0040] Figure 4 A schematic diagram of the structure of a computer device according to an embodiment of this application is shown.

[0041] Figure 5 Another structural schematic diagram of a computer device according to an embodiment of this application is shown. Detailed Implementation

[0042] To better understand the technical solution of the present invention, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0043] It should be understood that the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0044] The terminology used in the embodiments of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The singular forms “a,” “the,” and “the” as used in the embodiments of this invention and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0045] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0046] Please see Figure 1 , Figure 1 A schematic block diagram of a simulation test system for a 10kV high-voltage coal mining machine control box is shown according to an embodiment of the present invention.

[0047] like Figure 1 As shown, this embodiment of the invention provides a simulation test system for the electrical control box of a 10kV high-voltage coal mining machine, the system comprising: Voltage simulation module 11, cable parameter simulation module 12, load simulation module 13, measurement module 14, and control module 15; The voltage simulation module 11 is used to output analog voltage; The cable parameter simulation module 12 is connected to the voltage simulation module 11, the input side of the coal mining machine control box under test, and the control module 15. It is used to output the corresponding target cable parameters to the coal mining machine control box under test according to the target cable parameter command issued by the control module 15, so as to simulate the characteristics of different power supply cables. The load simulation module 13 is connected to the output side of the electrical control box of the coal mining machine under test and the control module 15. It is used to output the corresponding target load parameters to the electrical control box of the coal mining machine under test according to the target load parameter command issued by the control module 15, so as to simulate the load of each circuit. The measurement module 14 is connected to the voltage simulation module 11, the input side of the electrical control box of the coal mining machine under test, and the load simulation module 13, and is used to collect the analog voltage information of the voltage simulation module 11, the load current information of the load simulation module 13, and the temperature information of the electrical control box of the coal mining machine under test. The control module 15 is connected to and controls the voltage simulation module 11, the electrical control box of the coal mining machine under test, the cable parameter simulation module 12, and the load simulation module 13, respectively, and is used to coordinate the operation of each module and output control commands.

[0048] The coal mining machine electrical control box refers to the electrical control device installed on the coal mining machine, which is used to realize the power supply, control, protection and monitoring functions of the various motors and actuators of the coal mining machine. It usually includes frequency conversion circuit, power frequency circuit and related control and protection units.

[0049] A 10kV high-voltage coal mining machine refers to a coal mining machine with a power supply voltage level of 10kV. Compared with the traditional 3.3kV coal mining machine, it has the characteristics of higher voltage level, greater power and more complex electrical structure.

[0050] In the above technical solution, by integrating voltage simulation module, cable parameter simulation module, load simulation module, measurement module, and control module to form an integrated test architecture, a comprehensive, accurate, and controllable simulation of the test conditions of the 10kV high-voltage coal mining machine control box is achieved. The control module, as the core control unit, can coordinate the output of control commands and synchronously adjust the operating status and parameters of each simulation module, ensuring coordinated operation. The voltage simulation module can stably output simulated voltages that conform to actual operating conditions, providing a reliable high-voltage power supply simulation foundation for the test. The cable parameter simulation module can flexibly output corresponding target cable parameters according to control commands, accurately simulating line characteristics under different power supply conditions. The load simulation module can match… The power distribution control box outputs target load parameters for different circuits to recreate the load state of the coal mining machine in actual operation. The measurement module simultaneously collects key data such as voltage, current, and control box temperature, providing comprehensive support for test analysis. The synergistic effect of these modules effectively solves the shortcomings of traditional testing methods that cannot simultaneously ensure the realism of operating condition simulation, test safety, and operational flexibility. It eliminates the need to rely on actual coal conditions or large-scale high-voltage loads, reducing test costs and safety risks. At the same time, it improves the accuracy and reliability of the control box temperature rise and surface temperature test results, meeting the needs of multiple scenarios such as R&D, testing, and type testing of 10kV high-voltage coal mining machine control boxes, and providing strong data support for product design optimization and safety certification.

[0051] like Figure 2 As shown, in one embodiment, optionally, the voltage simulation module 11 includes: a rectifier 111, an inverter 112, a parallel asynchronous motor 113, and a voltage simulator 114; The rectifier 111 has its input terminal connected to the external power grid and its output terminal connected to the input terminal of the inverter 112, and is used to provide DC power to the inverter 112. The inverter 112 is connected to the asynchronous motor connection 113 at its output end, and is used to convert DC power into AC power with adjustable frequency to drive the motor. The asynchronous motor 113 is connected to the voltage simulator 114 and includes a motor and a generator. The motor is connected to the output terminal of the inverter, and the generator is used to generate electricity under the drive of the motor. The voltage simulator 114 is connected to the output terminal of the generator and is used to adjust the generator output voltage to generate the simulated voltage.

[0052] A counter-drive asynchronous motor refers to a counter-drive structure consisting of a motor and a generator connected mechanically. The motor drives the generator, and the generator outputs electrical energy to achieve energy conversion and load simulation.

[0053] A voltage simulator is a device used to adjust and control the output voltage of a test system, simulating different voltage levels and voltage fluctuations experienced by the electrical control box of a coal mining machine during actual operation.

[0054] In this embodiment, the rectifier 111 and inverter 112 work together to convert the grid frequency AC power into frequency-adjustable AC power. This not only matches the driving requirements of the asynchronous motor 113 but also provides a foundation for simulating power supply conditions at different frequencies, improving the flexibility of voltage simulation. The asynchronous motor 113 adopts a combination structure of a motor and a generator. The motor receives the adjustable frequency AC power output from the inverter 112 to drive its operation, which in turn drives the generator to generate electricity. This realizes energy conversion within the test system, eliminating the need for additional independent high-voltage power generation equipment, simplifying the test system structure, and reducing the construction cost of the test platform. The voltage simulator 114 is directly connected to the generator output terminal, allowing for precise adjustment of the generator output voltage, enabling flexible... The simulation module 11 simulates the operating conditions of a 10kV high-voltage coal mining machine's electrical control box under various voltage levels, voltage fluctuations, load changes, and multi-circuit coordinated operation. This makes the electrical and thermal stresses experienced by the control box during the test more closely resemble actual working conditions, thereby improving the accuracy and reliability of temperature rise and surface temperature test results. The structural design of the entire voltage simulation module 11 balances stability and adjustability, producing a high-purity, low-fluctuation simulated voltage output. This provides a reliable high-voltage power supply foundation for subsequent cable parameter simulation, load simulation, and control box temperature rise testing, avoiding the safety risks associated with directly using full-load or high-voltage actual machine operation. While ensuring the authenticity of the test, it significantly improves test safety and guarantees the accuracy of the test results. Furthermore, this structure reduces dependence on the external power grid through internal energy conversion, lowering energy consumption losses during the test.

[0055] In one embodiment, optionally, the cable parameter simulation module 12 includes: a cable parameter simulator group 121 and a circuit breaker group 122; The cable parameter simulator group 121 includes a first cable parameter simulator, a second cable parameter simulator, and a third cable parameter simulator, which correspond to different circuits of the electrical control box of the coal mining machine under test, including a cutting circuit, a pumping circuit, and a traction circuit, and are used to simulate different power supply distances and cable characteristics by adjusting resistance, inductance, and capacitance parameters. Circuit breaker group 122 is connected between each circuit of the cable parameter simulator group 121 and the electrical control box of the coal mining machine under test, and is used to control the connection and disconnection of each circuit.

[0056] A cable parameter simulator group refers to a device that uses adjustable electrical parameters such as resistance, inductance, and capacitance to perform equivalent simulation of the electrical characteristics of actual power supply cables. It is used to simulate the impact of different power supply distances and different cable conditions on the operating status of the electrical control box.

[0057] This embodiment achieves accurate simulation of the characteristics of actual power supply cables through refined configuration of the cable parameter simulation module 12. Its technical effects are mainly reflected in the following aspects: First, the cable parameter simulator group 121 is equipped with three independent cable parameter simulators, corresponding to the cutting circuit, pumping circuit, and traction circuit of the coal mining machine's electrical control box under test, respectively. The resistance, inductance, and capacitance parameters can be independently adjusted according to the power supply characteristics of different circuits, accurately simulating the electrical characteristics of the line under different power supply distances and cable specifications. This solves the problems of neglecting the influence of cable parameters and large deviations between the test environment and actual working conditions in traditional tests, ensuring that the line impedance and loss experienced by the electrical control box during the test are consistent with the actual underground operating conditions, thus improving the authenticity of the temperature rise and surface temperature test results; Second, the circuit breaker group 1... The cable parameter simulation module 12 is connected between the cable parameter simulator group 121 and each circuit of the electrical control box. It can flexibly control the connection and disconnection of each circuit. On the one hand, it can realize flexible switching between single-circuit testing and multi-circuit collaborative testing to meet the needs of different test scenarios and improve the flexibility of testing. On the other hand, if an abnormality occurs in a certain circuit during the test, the circuit breaker can quickly disconnect the circuit to prevent the abnormality from escalating, ensure the safety of the test system and the electrical control box under test, and reduce the test risk. Thirdly, the design of the entire cable parameter simulation module 12 is close to the actual power supply scenario in the well, and can fully cover the simulation needs of different cable working conditions. It provides reliable test conditions for analyzing the impact of cable parameters on the operating status and temperature rise characteristics of the electrical control box, and provides data support for the circuit matching design and heat dissipation optimization of the electrical control box.

[0058] In one embodiment, optionally, the load simulation module 13 includes: a load simulator group 131, the load simulator group 131 including an impedance simulation load 1311 and a nonlinear simulation load 1312; The impedance simulation load 1311 is connected to the cutting circuit and pumping circuit of the electrical control box of the coal mining machine under test, and is used to simulate the linear load characteristics of the power frequency circuit of the electrical control box of the coal mining machine under test. The nonlinear analog load 1312 is connected to the traction circuit of the electrical control box of the coal mining machine under test, and is used to simulate the nonlinear load characteristics of the frequency conversion circuit of the electrical control box of the coal mining machine under test.

[0059] A load simulator group refers to a collection of devices used to simulate the actual working load of a coal mining machine, including impedance simulation loaders and nonlinear simulation loaders, which are used to apply a controllable load to the output circuit of the electrical control box.

[0060] Impedance simulation loads are devices that simulate the characteristics of linear loads by means of adjustable resistors or adjustable reactances, and are used to simulate the electrical characteristics of power frequency motors or similar loads.

[0061] Nonlinear analog load converters are devices used to simulate the load characteristics of nonlinear electrical equipment. Their current and voltage are not linearly related, and they can be used to simulate the harmonic and power factor variation characteristics generated by equipment such as frequency converters and rectifiers.

[0062] This embodiment achieves accurate reproduction of the load characteristics of each circuit in the electrical control box by specifically configuring different types of load simulators. Its main technical effects include: First, the load simulator group 131 adopts a combination design of impedance simulation load 1311 and nonlinear simulation load 1312, closely matching the load characteristics of different circuits in the 10kV high-voltage coal mining machine electrical control box. The impedance simulation load 1311 is connected to the cutting circuit and the pumping circuit, accurately simulating the linear load characteristics of the power frequency circuit and reproducing the current and power changes of the power frequency motor under actual working conditions. The nonlinear simulation load 1312 is connected to the traction circuit, simulating the nonlinear load characteristics of the frequency converter circuit and reproducing phenomena such as harmonics and power factor fluctuations generated by frequency converters and other equipment, solving the problem of single load simulation in traditional tests. The design overcomes several drawbacks: first, it cannot reproduce the load state of multi-loop coordinated operation; second, the two load simulators can flexibly adjust load parameters according to the instructions of the control module 15, simulating load changes of the coal mining machine under different operating conditions such as no-load, light-load, full-load, and sudden load changes, comprehensively covering the typical operating scenarios of the electrical control box, ensuring that the electrical stress and thermal stress borne by the electrical control box during the test are highly consistent with the actual operating state, thus ensuring the accuracy and reliability of the temperature rise and surface temperature test results; third, the corresponding connection design between the load simulator and each loop of the electrical control box can realize flexible switching between single-loop load simulation and multi-loop coordinated load simulation, facilitating the analysis of the impact of different loop loads on the overall temperature rise of the electrical control box by test personnel, providing strong support for the sub-loop heat dissipation design and load distribution optimization of the electrical control box.

[0063] In one embodiment, optionally, the load simulation module 13 further includes: an energy feedback line 132; The energy feedback line 132 is connected to the output terminal of the load simulation module 13 and the input side of the voltage simulation module 11, and is used to feed back the electrical energy output by the load simulator group to the input side of the inverter for recycling.

[0064] An energy feedback circuit refers to an electrical connection path that sends electrical energy from the load circuit back to the front-end device of the test system (such as the input side of the inverter) for reuse, in order to improve the energy efficiency of the test system and reduce energy consumption.

[0065] This embodiment further optimizes the energy consumption performance of the test system by adding an energy feedback line 132. Its main technical effects are as follows: First, the energy feedback line 132 connects the output of the load simulation module 13 to the input of the voltage simulation module 11, allowing excess electrical energy generated during the operation of the load simulator group 131 to be fed back to the input of the inverter 112, achieving energy recycling and effectively reducing the test system's energy consumption from the external power grid. This is particularly suitable for long-term, high-power temperature rise tests of the 10kV high-voltage coal mining machine control box, significantly reducing the test's operating costs. Second, the recycling of electrical energy reduces energy loss during the test, lowers the extra heat generated by energy waste, and avoids interference with test results from abnormally high ambient temperatures, indirectly improving the accuracy of temperature rise and surface temperature tests. Third, the design of the energy feedback line 132 does not require significant modifications to the structure of the original load simulation module 13 and voltage simulation module 11, offering strong compatibility and flexible adaptation to existing test systems, improving the system's practicality and economy, while also conforming to the industry's trend of energy conservation and environmental protection.

[0066] Surface temperature refers to the temperature of the enclosure or exposed surface of electrical equipment during operation, and is used to assess the impact of equipment on personnel safety and environmental adaptability during actual use.

[0067] Temperature rise test refers to the test process of operating electrical equipment under specified operating conditions and measuring the temperature change over time during operation to evaluate the thermal characteristics and heat dissipation performance of the equipment.

[0068] In one embodiment, optionally, the measurement module 14 includes: a voltage acquisition unit, a current acquisition unit, and a temperature acquisition unit; The voltage acquisition unit is located on the output side of the voltage simulation module and the input side of the electrical control box of the coal mining machine under test, and is used to acquire analog voltage information. The current acquisition unit is installed in the loop of the load simulation module and is used to acquire current information during the operation of the load. The temperature acquisition unit is installed on the surface and at key internal locations of the electrical control box of the coal mining machine under test, and is used to collect surface temperature information and internal component temperature rise information of the electrical control box.

[0069] This embodiment achieves comprehensive and accurate acquisition of experimental data through refined configuration of the measurement module 14. Its main technical effects include: First, the measurement module 14 is divided into three independent acquisition units with clear division of labor and strong acquisition focus—the voltage acquisition unit is located on the output side of the voltage simulation module 11 and the input side of the control box, enabling simultaneous acquisition of the output parameters of the simulated voltage and the input voltage parameters of the control box, facilitating comparative analysis of voltage loss and fluctuations during transmission, and providing a basis for optimizing the accuracy of voltage simulation; the current acquisition unit is located in the loop of the load simulation module 13, enabling real-time capture of current changes during load operation, accurately reflecting the realism and stability of the load simulation; the temperature acquisition unit is located on the surface of the control box and... The system features three key features: First, it allows for the simultaneous acquisition of surface temperature and internal component temperature rise information at critical internal locations, providing a comprehensive understanding of the thermal distribution characteristics and temperature rise patterns of the electrical control box. This overcomes the limitations of traditional testing methods that only collect surface temperature data and cannot fully analyze the thermal characteristics of the electrical control box. Second, the synchronous operation of each acquisition unit enables the simultaneous acquisition and real-time transmission of voltage, current, and temperature data, ensuring the timeliness and relevance of test data. This facilitates comprehensive analysis by testing personnel of the correspondence between the electrical state and thermal characteristics of the electrical control box under different operating conditions. Third, the precise configuration of the acquisition units improves the accuracy of test data acquisition, avoids the impact of data deviations on test result analysis, and provides high-precision and comprehensive data support for the thermal optimization, reliability assessment, and safety certification of the electrical control box.

[0070] In one embodiment, optionally, the control module is configured as follows: Send voltage adjustment commands to the voltage simulation module to simulate different voltage levels and fluctuating operating conditions; Send cable parameter configuration instructions to the cable parameter simulation module to simulate different power supply distances and cable characteristics; Send load parameter adjustment commands to the load simulation module to simulate different load combinations and changing operating conditions; It receives data collected by the measurement module and performs real-time analysis and storage of the test data.

[0071] This embodiment, by clearly defining the specific control functions of the control module 15, achieves overall coordination and precise control of the test system. Its technical effects are mainly reflected in the following aspects: First, the control module 15 can send targeted control commands to each simulation module. For example, it can send voltage adjustment commands to the voltage simulation module 11, flexibly simulating different voltage levels and fluctuation conditions to adapt to the voltage requirements of different test scenarios; it can send cable parameter configuration commands to the cable parameter simulation module 12, quickly switching between simulation conditions of different power supply distances and cable characteristics, improving the flexibility and efficiency of the simulation; and it can send load parameter adjustment commands to the load simulation module 13, simulating different load combinations and load change conditions, comprehensively covering the typical operating scenarios of the electrical control box. Second, the control module 15 can receive data collected by the measurement module 14. The system collects and analyzes various test data in real time, facilitating real-time monitoring of the test process and timely detection of test anomalies. It also provides convenience for data analysis and result evaluation after the test, improving the level of intelligence in the test. Thirdly, the control module 15 coordinates and controls all modules, ensuring the synergistic synchronization of voltage simulation, cable parameter simulation, load simulation, and data acquisition, avoiding test deviations caused by the disconnection of each module, and ensuring the stability and repeatability of the test process. Fourthly, the centralized control of the control module 15 simplifies the test operation process, eliminating the need for manual adjustment of parameters of each module, reducing the operational difficulty and labor intensity of test personnel, and reducing errors caused by manual operation, further improving the accuracy and efficiency of the test.

[0072] During the test, the rectifier first converts the AC power supplied by the grid into DC power, and then the inverter converts the DC power into AC power of the required frequency and voltage to drive the motor in the asynchronous motor. The mechanical energy of the motor is transferred to the generator through the asynchronous structure, causing the generator to generate electricity.

[0073] The electrical energy output by the generator is fed into the voltage simulator. The voltage simulator adjusts the output voltage according to the target parameters set by the control system to simulate the voltage levels and fluctuations that may occur during the actual operation of the coal mining machine.

[0074] The regulated voltage is input to the electrical control box of the coal mining machine under test after passing through the cable parameter simulator group. The cable parameter simulator group is used to simulate the impact of different power supply distances and different cable characteristics on the operating status of the electrical control box by adjusting the resistance, inductance and capacitance parameters.

[0075] After receiving simulated power, the electrical control box of the coal mining machine under test enters the operating state, and its output circuits are connected to the corresponding load simulators. The load simulator group simulates the actual load changes of the coal mining machine under different operating conditions by adjusting the impedance parameters and nonlinear characteristics, so that the electrical control box is subjected to an electrical load similar to that in actual operation during the test.

[0076] During system operation, the measurement system collects real-time data on voltage and current in each circuit, as well as the surface and internal temperature information of the electrical control box of the coal mining machine under test, for subsequent temperature rise analysis and performance evaluation. Electrical energy in the load circuit is fed back to the inverter input side through an energy feedback line, achieving energy recycling.

[0077] Through the above structure and working method, this solution constructs a test environment that can realistically simulate the actual operating conditions of a 10kV coal mining machine electrical control box under safe and controllable conditions, thereby achieving effective testing of the temperature rise and surface temperature of the electrical control box.

[0078] All the technical means employed in this solution serve the overall purpose of simulating the temperature rise and surface temperature of the high-pressure coal mining machine's electrical control box under actual operating conditions. For some of these technical points, those skilled in the art can employ other equivalent or alternative methods without departing from the core principles of this solution. The common point is to construct a test environment closely resembling actual operating conditions through controllable electrical parameter simulation. Specific alternative methods include, but are not limited to, the following.

[0079] (1) On alternative methods for energy conversion and load simulation of asynchronous motors.

[0080] This scheme uses a motor-generator-driven asynchronous motor structure to achieve energy conversion and load simulation. Alternatively, other forms of energy feedback or loading devices can be used, such as four-quadrant frequency converters, controllable electronic loads, or motor loading test benches to achieve load simulation. The common feature of these alternative methods is that they all enable energy regulation and load control within the test system to construct the power supply and loading conditions required for high-voltage testing.

[0081] (2) Alternative implementation of voltage simulation method.

[0082] This solution uses a voltage simulator to adjust the generator output voltage to simulate voltage levels and fluctuations under actual operating conditions. Alternatively, adjustable transformers, multi-stage transformer combinations, power electronic voltage regulators, or other controllable power supply modules can be used to achieve voltage regulation. The common feature of these methods is that they all provide adjustable and controllable input conditions during testing to meet the testing requirements of the electrical control box.

[0083] (3) Alternative methods for the cable parameter simulator group.

[0084] This solution uses adjustable simulation of resistance, inductance, and capacitance parameters to equivalently reproduce different power supply distances and cable characteristics. Alternatively, a fixed combination of resistance, reactance, and capacitor parameters can be used, or cable characteristics can be simulated by switching between multiple parameter modules. The common thread is that both methods simulate the impact of the actual power supply line on the operating status of the control box by introducing equivalent electrical parameters.

[0085] (4) Alternatives for load simulator groups.

[0086] This solution uses impedance simulation loads and nonlinear simulation loads to simulate the load characteristics of different circuits. Alternatively, resistor cabinets, reactor banks, electronic load devices, or other programmable load units can be used to simulate linear or nonlinear load characteristics. The common feature of these alternative methods is that they all apply a controllable electrical load to the output circuit of the control box to simulate actual operating load conditions.

[0087] (5) Alternative implementation methods for the control system.

[0088] This solution uses a centralized control system to uniformly adjust voltage, cable parameters, and load parameters. Alternatively, a distributed control system, industrial controller, or computer control platform can be used to coordinate and control various functional modules via communication. The common feature is that all of them achieve unified management and coordinated adjustment of the key parameters of the test system.

[0089] (6) Regarding alternative implementation methods of the measurement system.

[0090] This solution uses current, voltage, and temperature sensors to monitor the test process. Alternatively, other types of electrical measuring devices or temperature acquisition devices can be used, such as fiber optic temperature measurement, infrared temperature measurement, or multi-channel data acquisition systems. Their commonality is that they are all used to acquire electrical and thermal status information of the control box during the test.

[0091] In summary, although this solution provides a preferred implementation method, those skilled in the art can make various equivalent substitutions for the specific implementation methods without departing from the overall technical concept of this solution, and all such substitutions should be considered to fall within the protection scope of this solution.

[0092] Without departing from the core technical concept of this solution, those skilled in the art can design various variations of the overall structure or application of this solution. These variations can also achieve the purpose of simulating the temperature rise and surface temperature of the 10kV high-voltage coal mining machine's electrical control box, and should all be considered reasonable variations of this solution. Specific variations include, but are not limited to, the following forms.

[0093] (1) A variant scheme applicable to the electrical control box of coal mining machine with different voltage levels.

[0094] This solution uses a 10kV high-voltage coal mining machine control box as an example for illustration. However, by adjusting the voltage simulation range, cable parameter simulation range, and load capacity in the system, it can also be applied to the temperature rise and surface temperature tests of coal mining machine control boxes or similar mining electrical control equipment at other voltage levels such as 3.3kV and 6kV. This type of variation is consistent with this solution in terms of system structure and working principle, differing only in parameter settings and equipment selection.

[0095] (2) Variations applicable to different circuit configurations or load combinations.

[0096] In this scheme, load simulations are performed on the cutting circuit, pumping circuit, and traction circuit of the coal mining machine's electrical control box. As a variant, the number of circuits, circuit types, or load combinations can be adjusted according to the specific structural characteristics of the electrical control box. For example, only some circuits can be subjected to load tests, or load simulations of other functional circuits can be added. The above variants are still based on the testing concept of multi-circuit coordinated operation, and can achieve the testing objectives of overall temperature rise and surface temperature.

[0097] (3) Modular configuration of the test system variant.

[0098] The voltage simulation module, cable parameter simulation module, load simulation module, and measurement module in this solution can be modularly combined according to test requirements. For example, in some test scenarios, the cable parameter simulation module or the nonlinear load simulation module can be configured as independent functional units; in other test scenarios, multiple modules can be integrated into an integrated test device. This type of variation is consistent with the present solution in terms of functionality, and is used to construct a controllable simulation test environment.

[0099] (4) Variations of test operation methods and control strategies.

[0100] This solution uses a control system to centrally control each module. As a variation, a phased testing approach or different control strategies can also be adopted, such as first conducting a single-loop loading test, then a multi-loop combined loading test; or using a preset operating condition sequence with automatic switching to complete the temperature rise test. These variations differ in their control flow, but all aim to achieve the temperature rise and surface temperature testing of the electrical control box.

[0101] (5) Variations of application scenario expansion.

[0102] Besides the coal mining machine electrical control box, the overall technical concept of this solution can also be extended to temperature rise and thermal characteristic tests of other mining high-voltage electrical control equipment, industrial high-voltage electrical control cabinets, or similar electrical equipment. By adjusting the system parameters and load types accordingly, simulation tests on different equipment can be achieved. This type of application extension is also a reasonable variation of this solution.

[0103] In summary, although the above-mentioned variant solutions differ in system configuration, parameter settings, or application objects, they are all based on the controllable electrical simulation test concept proposed in this solution and can achieve the same or similar inventive purpose as this solution. Therefore, they should all be included in the protection scope of this solution.

[0104] like Figure 3 As shown, in a second aspect, embodiments of the present invention provide a method for simulating the temperature rise and surface temperature of a 10kV high-voltage coal mining machine control box, using the simulation test system described in any one of the embodiments of the first aspect, comprising the following steps: Step S301: Generate a target simulated voltage through the voltage simulation module to simulate the actual power supply conditions of the coal mining machine; Step S302: Configure the target cable parameters through the cable parameter simulation module to simulate different power supply distances and cable characteristics; Step S303: Configure the target load parameters through the load simulation module to simulate the actual load of each circuit of the coal mining machine; Step S304: Control the electrical control box of the coal mining machine under test to operate under different simulated working conditions through the control module, and synchronously collect voltage, current and temperature information through the measurement module; Step S305: Calculate the temperature rise and surface temperature characteristics of the electrical control box of the coal mining machine under test based on the collected temperature information.

[0105] In one embodiment, optionally, the step of generating the target simulated voltage through the voltage simulation module includes: The motor that drives the asynchronous motor is operated by the rectifier and inverter. The generator of the asynchronous motor generates electricity, which is then regulated by the voltage simulator and output as a target simulated voltage. The step of configuring the target load parameters through the load simulation module includes: The impedance-simulated load device simulates the characteristics of a linear load. The nonlinear load characteristics are simulated using the aforementioned nonlinear analog load device; The energy feedback circuit enables the feedback and reuse of electrical energy from the load.

[0106] Thirdly, embodiments of the present invention provide a computer device, including: at least one processor; and a memory communicatively connected to the at least one processor; The memory stores instructions executable by the at least one processor, the instructions being configured to perform the method for measuring the characteristic parameters of the radio frequency signal as described in any of the first aspect embodiments above.

[0107] Fourthly, embodiments of the present invention provide a computer-readable storage medium storing computer-executable instructions, which are used to execute the temperature rise and surface temperature simulation test method for the electrical control box of a 10kV high-voltage coal mining machine as described in any one of the embodiments of the second aspect above.

[0108] In one embodiment, a computer device is provided, which may be a server, and its internal structure diagram may be as follows: Figure 4 As shown, the computer device includes a processor, memory, network interface, and database connected via a system bus. The processor provides computing and control capabilities. The memory includes non-volatile and / or volatile storage media and internal memory. The non-volatile storage media stores the operating system, computer programs, and database. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The network interface is used to communicate with external clients via a network connection. When the computer program is executed by the processor, it implements the functions or steps of a method for measuring characteristic parameters of radio frequency signals on the server side.

[0109] In one embodiment, a computer device is provided, which may be a client, and its internal structure diagram may be as follows: Figure 5 As shown, the computer device includes a processor, memory, network interface, display screen, and input devices connected via a system bus. The processor provides computing and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The network interface is used to communicate with an external server via a network connection. When executed by the processor, the computer program implements the client-side functions or steps of a method for measuring characteristic parameters of radio frequency signals.

[0110] In one embodiment, a computer device is provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the method for measuring characteristic parameters of the radio frequency signal described above.

[0111] It should be noted that the functions or steps that can be implemented by the computer-readable storage medium or computer device described above can be referred to the relevant descriptions in the foregoing method embodiments. To avoid repetition, they will not be described one by one here.

[0112] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0113] It should be understood that although the terms "first," "second," etc., may be used to describe the setting units in the embodiments of this application, these setting units should not be limited to these terms. These terms are only used to distinguish the setting units from each other. For example, without departing from the scope of the embodiments of this application, the first setting unit may also be referred to as the second setting unit, and similarly, the second setting unit may also be referred to as the first setting unit.

[0114] Depending on the context, the word "if" as used here can be interpreted as "when," "when," "in response to determination," or "in response to detection." Similarly, depending on the context, the phrase "if determination" or "if detection (of the stated condition or event)" can be interpreted as "when determination," "in response to determination," "when detection (of the stated condition or event)," or "in response to detection (of the stated condition or event)."

[0115] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0116] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or in a combination of hardware and software functional units.

[0117] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of the embodiments of the above methods. Any references to memory, storage, databases, or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), dual data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), RAMbus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

[0118] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included within the protection scope of the present invention.

Claims

1. A simulation test system for the electrical control box of a 10kV high-voltage coal mining machine, characterized in that, The system includes: a voltage simulation module, a cable parameter simulation module, a load simulation module, a measurement module, and a control module; The voltage simulation module is used to output analog voltage; The cable parameter simulation module is connected to the voltage simulation module, the input side of the coal mining machine control box under test, and the control module. It is used to output the corresponding target cable parameters to the coal mining machine control box under test according to the target cable parameter command issued by the control module, so as to simulate the characteristics of different power supply cables. The load simulation module is connected to the output side of the electrical control box of the coal mining machine under test and the control module. It is used to output the corresponding target load parameters to the electrical control box of the coal mining machine under test according to the target load parameter command issued by the control module, so as to simulate the load of each circuit. The measurement module is connected to the voltage simulation module, the input side of the electrical control box of the coal mining machine under test, and the load simulation module, and is used to collect the analog voltage information of the voltage simulation module, the load current information of the load simulation module, and the temperature information of the electrical control box of the coal mining machine under test. The control module is connected to and controls the voltage simulation module, the electrical control box of the coal mining machine under test, the cable parameter simulation module, and the load simulation module, respectively, and is used to coordinate the operation of each module and output control commands.

2. The simulation test system according to claim 1, characterized in that, The voltage simulation module includes: a rectifier, an inverter, a counter-drive asynchronous motor, and a voltage simulator; The rectifier has an input terminal connected to the external power grid and an output terminal connected to the input terminal of the inverter, and is used to provide DC power to the inverter. The inverter, with its output connected to the asynchronous motor, is used to convert DC power into AC power with adjustable frequency to drive the motor. The asynchronous motor is connected to the voltage simulator and includes a motor and a generator. The motor is connected to the output of the inverter, and the generator is used to generate electricity under the drive of the motor. The voltage simulator is connected to the output terminal of the generator and is used to adjust the generator output voltage to generate the simulated voltage.

3. The simulation test system according to claim 1, characterized in that, The cable parameter simulation module includes: a cable parameter simulator group and a circuit breaker group; The cable parameter simulator group includes a first cable parameter simulator, a second cable parameter simulator, and a third cable parameter simulator, which correspond to different circuits of the electrical control box of the coal mining machine under test, including a cutting circuit, a pumping circuit, and a traction circuit. They are used to simulate different power supply distances and cable characteristics by adjusting resistance, inductance, and capacitance parameters. The circuit breaker group is connected between the cable parameter simulator group and the electrical control box of the coal mining machine under test, and is used to control the connection and disconnection of each circuit.

4. The simulation test system according to claim 3, characterized in that, The load simulation module includes: a load simulator group, which includes an impedance simulation load and a nonlinear simulation load; The impedance simulation load is connected to the cutting circuit and pumping circuit of the electrical control box of the coal mining machine under test, and is used to simulate the linear load characteristics of the power frequency circuit of the electrical control box of the coal mining machine under test. The nonlinear analog load is connected to the traction circuit of the electrical control box of the coal mining machine under test, and is used to simulate the nonlinear load characteristics of the frequency conversion circuit of the electrical control box of the coal mining machine under test.

5. The simulation test system according to claim 4, characterized in that, The load simulation module also includes: an energy feedback circuit; The energy feedback line is connected to the output of the load simulation module and the input of the voltage simulation module, and is used to feed the electrical energy output by the load simulator group back to the input of the inverter for recycling.

6. The simulation test system according to claim 1, characterized in that, The measurement module includes: a voltage acquisition unit, a current acquisition unit, and a temperature acquisition unit; The voltage acquisition unit is located on the output side of the voltage simulation module and the input side of the electrical control box of the coal mining machine under test, and is used to acquire analog voltage information. The current acquisition unit is installed in the loop of the load simulation module and is used to acquire current information during the operation of the load. The temperature acquisition unit is installed on the surface and at key internal locations of the electrical control box of the coal mining machine under test, and is used to collect surface temperature information and internal component temperature rise information of the electrical control box.

7. The simulation test system according to claim 1, characterized in that, The control module is configured as follows: Send voltage adjustment commands to the voltage simulation module to simulate different voltage levels and fluctuating operating conditions; Send cable parameter configuration instructions to the cable parameter simulation module to simulate different power supply distances and cable characteristics; Send load parameter adjustment commands to the load simulation module to simulate different load combinations and changing operating conditions; It receives data collected by the measurement module and performs real-time analysis and storage of the test data.

8. A method for simulating temperature rise and surface temperature of a 10kV high-voltage coal mining machine control box, characterized in that, The simulation test system according to any one of claims 1-7 includes the following steps: The voltage simulation module generates a target simulated voltage to simulate the actual power supply conditions of the coal mining machine. The target cable parameters are configured using the cable parameter simulation module to simulate different power supply distances and cable characteristics; The target load parameters are configured through the load simulation module to simulate the actual load of each circuit of the coal mining machine. The control module controls the operation of the electrical control box of the coal mining machine under test under different simulated working conditions, and the measurement module synchronously collects voltage, current and temperature information. The temperature rise and surface temperature characteristics of the electrical control box of the coal mining machine under test are calculated based on the collected temperature information.

9. The simulation test method according to claim 8, characterized in that, The step of generating the target simulated voltage through the voltage simulation module includes: The motor that drives the asynchronous motor is operated by the rectifier and inverter. The generator of the asynchronous motor generates electricity, which is then regulated by the voltage simulator and output as a target simulated voltage. The step of configuring the target load parameters through the load simulation module includes: The impedance-simulated load device simulates the characteristics of a linear load. The nonlinear load characteristics are simulated using the aforementioned nonlinear analog load device; The energy feedback circuit enables the feedback and reuse of electrical energy from the load.

10. A computer-readable storage medium storing computer-executable instructions, characterized in that, The computer-executable instructions are used to perform the method as described in claim 8 or 9.

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