Test system and test method for braking working condition of deepwater power source

Abstract

The application discloses a kind of braking operating mode test system and test method of deepwater power source, it is related to underwater power source digital testing field, the system includes power simulation device, for simulating power source to underwater equipment provides normal working working kinetic energy;Brake simulation device, for simulating brake source to underwater equipment provides braking kinetic energy when energy consumption brake;Test device is connected with power simulation device, brake simulation device, test device is used to switch the working kinetic energy provided by power simulation device to the braking kinetic energy provided by brake simulation device when energy consumption brake, and after braking kinetic energy supplies energy to underwater equipment, the electric parameter output by brake simulation device is collected, and the system performance of deepwater power source under braking operating mode is verified using electric parameter.For actual underwater power source system design provides data reference, further realizes the overall system performance of underwater power source under braking operating mode is accurately verified.

Description

Technical Field

[0001] This application relates to the field of digital testing technology for underwater power sources, specifically to a testing system and method for testing the braking conditions of a deep-water power source. Background Technology

[0002] Existing testing methods for deep-sea dedicated underwater power sources have many shortcomings, making it impossible to comprehensively and accurately evaluate the overall system performance of deep-sea power sources under complex operating conditions. For example, in systems where long cables drive underwater variable frequency motors to drive hydraulic loads, excessive braking can lead to a surge in current and insufficient power from the power source. Summary of the Invention

[0003] In view of this, the testing system and method for the braking condition of a deep-water power source provided in this embodiment of the invention are intended to solve the problem of how to verify the overall system performance of a deep-water power source under braking conditions, and to provide a reference for accurately evaluating the overall system performance of a deep-water power source under complex conditions.

[0004] According to a first aspect, embodiments of the present invention provide a testing system for the braking condition of a deep-water power source, comprising:

[0005] A power simulation device is used to simulate the working kinetic energy that a power source provides to underwater equipment for normal operation.

[0006] A braking simulation device is used to simulate the braking kinetic energy provided by a braking source to underwater equipment during energy-consuming braking.

[0007] The testing device is connected to the power simulation device and the braking simulation device. The testing device is used to switch the working kinetic energy provided by the power simulation device to the braking kinetic energy provided by the braking simulation device during energy consumption braking. After the braking kinetic energy supplies power to the underwater equipment, the testing device collects the electrical parameters output by the braking simulation device and uses the electrical parameters to verify the system performance of the deep-water power source under braking conditions.

[0008] According to a second aspect, embodiments of the present invention provide a method for testing the braking condition of a deep-water power source. This method is applied to any of the aforementioned testing systems for the braking condition of a deep-water power source. The testing method includes:

[0009] After the power simulation device has been running for a preset time, the control and testing device switches the working kinetic energy provided by the power simulation device to the braking kinetic energy provided by the braking simulation device. After the braking kinetic energy supplies power to the underwater equipment, the electrical parameters output by the braking simulation device are collected, and the electrical parameters are used to verify the system performance of the deep-water power source under braking conditions.

[0010] Compared with the prior art, this application has at least the following advantages or beneficial effects:

[0011] The braking condition testing system for deep-water power sources provided in this application simulates the working state of underwater equipment by setting up a power simulation device, a braking simulation device, and a testing device. By collecting the electrical parameters output by the braking simulation device, the system evaluates the overall system performance of the power source under braking conditions, providing data reference for the system design of actual underwater power sources, and accurately verifying the overall system performance of deep-water power sources under braking conditions.

[0012] The testing method for the braking condition of a deep-sea power source provided in this application embodiment involves switching the working kinetic energy to braking kinetic energy after the power simulation device has been running for a preset time. Then, the electrical parameters output by the braking simulation device are collected, and the system performance of the deep-sea power source under the braking condition is measured by analyzing the electrical parameters. This provides data reference for the system design of actual underwater power sources and further enables accurate verification of the overall system performance of the underwater power source under the braking condition. Attached Figure Description

[0013] The features and advantages of the invention will be more clearly understood by referring to the accompanying drawings, which are schematic and should not be construed as limiting the invention in any way. In the drawings:

[0014] Figure 1 A schematic diagram of the structure of a test system for the braking condition of a deep-water power source provided in an embodiment of this application.

[0015] Figure 2 Another schematic diagram of the test system for the braking condition of the deep-water power source provided in the embodiments of this application.

[0016] Figure 3 A schematic diagram of the circuit structure of the switching unit in the test system for the braking condition of the deep-water power source provided in the embodiments of this application.

[0017] Figure 4 A schematic flowchart illustrating the testing method for the braking condition of a deep-water power source provided in this application embodiment.

[0018] Figure 5 The flowchart illustrates steps S1 to S5 of the test method for the braking condition of the deep-water power source provided in the embodiments of this application.

[0019] Figure 6 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application.

[0020] Figure Labels

[0021] 10-Power simulation device; 11-Brake simulation device; 12-Testing device; 13-Load; 101-Variable frequency power supply; 111-DC braking power supply; 112-Motor; 121-Switching unit; 122-Acquisition unit; 123-Control unit; 1211-First input line; 1212-Second input line; 1213-Third input line; 1214-Fourth input line; 1215-Fifth input line; 1216-First output line; 1217-Second output line; 1218-Third output line; 1219-First switching switch; 12110-Second switching switch; 12111-Third switching switch; 124-Hydraulic unit; 125-Generator; 1241-Hydraulic pump; 1242-Hydraulic motor; 21-Controller; 20-Memory. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only 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 creative effort are within the scope of protection of the present invention.

[0023] To ensure the safety of underwater operations and the reliability and stability of underwater power sources, it is necessary to test their performance, especially in the performance evaluation of underwater power sources under extreme braking conditions (such as high-speed or full-speed emergency stop, braking under large inertia loads, braking under bus power failure, and low-speed high-torque braking). Based on this, this application proposes a testing system and method for braking conditions of deep-water power sources. The testing system and method are applicable to underwater equipment and can simulate complex underwater braking conditions, enabling accurate verification of the overall system performance of the power source system under braking conditions.

[0024] This application provides a test system for the braking condition of a deep-sea power source. For example... Figure 1 The diagram shown is a structural schematic of a test system for the braking condition of a deep-sea power source provided in an embodiment of this application. The test system for the braking condition of a deep-sea power source provided in this application is used to simulate the operating performance of the underwater equipment and the overall system under braking conditions, so as to provide data reference for the system design of actual underwater power sources and further realize accurate verification of the overall system performance of the underwater power source under braking conditions.

[0025] Continue reading Figure 1The testing system for the braking condition of a deep-water power source provided in this application includes: a power simulation device 10, a braking simulation device 11, and a testing device 12, wherein the power simulation device 10 and the braking simulation device 11 are connected to the testing device 12.

[0026] The power simulation device 10 is used to simulate the power source providing working kinetic energy to underwater equipment for normal operation.

[0027] The braking simulation device 11 is used to simulate the braking energy provided by the braking source to the underwater equipment during energy-consuming braking.

[0028] The test device 12 is used to switch the working kinetic energy provided by the power simulation device 10 to the braking kinetic energy provided by the braking simulation device 11 during energy consumption braking. After the braking kinetic energy supplies power to the underwater equipment (not shown), the device collects the electrical parameters output by the braking simulation device 11 and uses the electrical parameters to verify the system performance of the deep-water power source under braking conditions.

[0029] The deep-sea power source braking condition test system provided in this application embodiment simulates the working state of underwater equipment by setting up a power simulation device 10, a braking simulation device 11 and a test device 12, and collecting the electrical parameters output by the braking simulation device 11. The collected electrical parameters are used to evaluate the overall system performance of the power source system under braking condition, providing data reference for the system design of actual underwater power sources, and further realizing accurate verification of the overall system performance of the underwater power source under braking condition.

[0030] To further understand the testing system for the braking condition of the deep-water power source provided in this application, please refer to... Figure 2 The diagram shown is another structural schematic of the testing system for the braking condition of the deep-water power source provided in this application embodiment. In this embodiment, the power simulation device 10, the braking simulation device 11, and the testing device 12 are also connected to the load 13, wherein the load 13 includes equipment such as a hydraulic unit 124 and a generator 125.

[0031] Specifically, the testing system for the braking condition of the deep-water power source can be composed of a power simulation device 10, a braking simulation device 11, a testing device 12, and a load 13. The load 13 is connected to the power simulation device 10 and the braking simulation device 11, and the testing device 12 is connected to the power simulation device 10 and the braking simulation device 11.

[0032] When the deep-sea power source braking condition test system is started, the power simulation device 10 is connected to the test device 12. The power simulation device 10 provides working kinetic energy to the load 13 to maintain the normal operation of the load 13. After maintaining the normal operation of the load 13 for a period of time, the deep-sea power source braking condition test system enters the energy consumption braking mode. At this time, the test device 12 disconnects the power simulation device 10 and connects to the braking simulation device 11. The braking simulation device 11 provides braking kinetic energy to the load 13. After the load 13 brakes, the test device 12 evaluates the overall system performance of the power source system under braking condition by collecting the electrical parameters output by the braking simulation device 11. Through simulation testing, the overall system performance of the underwater power source under braking condition is accurately verified.

[0033] In this embodiment, the power simulation device 10 includes: a frequency converter 101, which is used to output three-phase voltage; the braking simulation device 11 includes: a DC braking power supply 111, which is used to output DC voltage, and its DC braking voltage is 1100V. In other embodiments, the DC braking voltage can also be selected according to the actual situation.

[0034] The power simulation device 10 and the braking simulation device 11 are also equipped with an electric motor 112. The electric motor 112 is selectively connected to the frequency converter 101 or the DC braking power supply 111. When the electric motor 112 is connected to the frequency converter 101, it receives the three-phase voltage output by the frequency converter 101 and converts the three-phase voltage into working kinetic energy. When the electric motor 112 is connected to the DC braking power supply 111, it receives the DC voltage output by the DC braking power supply 111 and converts the DC voltage into braking kinetic energy.

[0035] In this embodiment, the motors 112 in the power simulation device 10 and the braking simulation device 11 are the same motor 112. The motor 112 is connected to the test device 12 to selectively connect to the frequency converter 101 or the DC braking power supply 111, selectively outputting working functions or braking kinetic energy. By setting up the power simulation device 10 and the braking simulation device 11, the braking conditions of deep water or underwater power sources are simulated, making the data collected in the simulated scenario tend to be similar to the data collected in the actual scenario, thus ensuring the accuracy of data verification.

[0036] In the embodiments of this application, the testing device 12 includes a switching unit 121, a data acquisition unit 122, and a control unit 123. The switching unit 121 is selectively connected between the motor 112 and the frequency converter 101 and the DC braking power supply 111. The data acquisition unit 122 is connected between the switching unit 121 and the motor 112. The control unit 123 is connected between the switching unit 121 and the data acquisition unit 122.

[0037] The switching unit 121 is used to switch working kinetic energy to braking kinetic energy, or to switch braking kinetic energy to working kinetic energy.

[0038] Optionally, the switching unit 121 can be a switching switch, such as a single-pole double-throw switch, circuit breaker, controllable switch, or selector.

[0039] Specifically, such as Figure 3 As shown, the testing system for the braking condition of the deep-sea power source includes: a frequency converter 101, a DC braking power supply 111, a motor 112, and a switching unit 121. The switching unit 121 may include: a first input line 1211, a second input line 1212, a third input line 1213, a fourth input line 1214, a fifth input line 1215, a first output line 1216, a second output line 1217, a third output line 1218, a first switching switch 1219, a second switching switch 12110, and a third switching switch 12111.

[0040] Specifically, the first end of the first input line 1211 is connected to the first phase of the frequency converter 101, the first end of the second input line 1212 is connected to the second phase of the frequency converter 101, the first end of the third input line 1213 is connected to the third phase of the frequency converter 101, the second end of the first input line 1211 is connected to the first end of the first switch 1219, the second end of the second input line 1212 is connected to the first end of the second switch 12110, and the second end of the third input line 1213 is connected to the first end of the third switch 12111.

[0041] The first end of the fourth input line 1214 is connected to the first end of the DC braking power supply 111, the first end of the fifth input line 1215 is connected to the second end of the DC braking power supply 111, the second end of the fourth input line 1214 is connected to the second end of the first switching switch 1219, and the second end of the fifth input line 1215 is connected to the second end of the second switching switch 12110.

[0042] The first end of the first output line 1216 is connected to the third end of the first switch 1219, the first end of the second output line 1217 is connected to the third end of the second switch 12110, the first end of the third output line 1218 is connected to the second end of the third switch 12111, and the second ends of the first output line 1216, the second output line 1217, and the third output line 1218 are all connected to the motor 112.

[0043] When the test system for the braking condition of the deep-water power source is working normally, the three-phase voltage output by the frequency converter 101 provides normal power to the underwater equipment.

[0044] When performing energy-consuming braking in the testing system for the braking condition of a deep-water power source, the three-phase voltage power supply is switched to DC braking voltage power supply by controlling the on / off state of the first switching switch 1219, the second switching switch 12110, and the third switching switch 12111. This simulates the normal operating conditions or braking conditions of deep-water or underwater power sources / underwater equipment, making the data collected in the simulated scenario closer to the data collected in the actual scenario, and ensuring the accuracy of data verification.

[0045] See also Figure 2 As shown, in Figure 1 The testing system for the braking conditions of deep-sea power sources also includes:

[0046] The acquisition unit 122 is used to acquire the electrical parameters output by the switching unit 121.

[0047] In some embodiments, the acquisition unit 122 is located between the motor 112 and the switching unit 121. The acquisition unit 122 may be a sampling resistor, which calculates the in-circuit electrical parameters, such as power, using the resistance value.

[0048] The control unit 123 is used to control the switching unit 121 to switch working kinetic energy to braking kinetic energy, or to switch braking kinetic energy to working kinetic energy, and to verify the system performance of the deep-water power source under braking conditions using electrical parameters.

[0049] In this embodiment, the control unit 123 can be a control device such as an FPGA, a microcontroller, or a PLC composed of control chips.

[0050] To achieve intelligent control, an acquisition unit 122 and a control unit 123 can be set up to monitor the electrical parameters of the test system and underwater equipment's operating conditions or working modes. The monitored electrical parameters are used to intelligently control the first switching switch 1219, the second switching switch 12110, and the third switching switch 12111 to accurately switch between normal and braking conditions, so that the data collected in the simulated scenario tends to the data collected in the actual scenario, ensuring the accuracy of data verification.

[0051] The deep-water power source braking condition testing system provided in this application embodiment, in addition to the device, unit or component provided in the above embodiment, is also connected to a hydraulic unit 124 and a generator 125.

[0052] Hydraulic unit 124 is connected to electric motor 112 and is used to convert the working kinetic energy or braking kinetic energy output by electric motor 112 into mechanical energy; generator 125 is connected to hydraulic unit 124 and is used to convert mechanical energy into electrical energy to power underwater equipment.

[0053] In this embodiment, in order to simulate the real working conditions of the underwater environment as much as possible, the load is digitized into a hydraulic unit 124 and a generator 125. The electric motor 112 converts electrical energy into mechanical energy and transmits it to the hydraulic unit 124.

[0054] In this embodiment, the hydraulic unit 124 and the electric motor 112 are used as part of the load to simulate the normal operation of underwater equipment.

[0055] Optionally, the hydraulic unit 124 includes a hydraulic pump 1241 and a hydraulic motor 1242.

[0056] Optionally, the electric motor 112 and the hydraulic motor 1242 are connected to a frequency converter, which is used to adjust the speed of the electric motor 112 and the hydraulic pump 1241.

[0057] In this embodiment, the electric motor 112 and the hydraulic pump 1241 are coaxial. Therefore, when the speed of the electric motor 112 and the hydraulic pump 1241 is adjusted using a frequency converter, the output flow and pressure of the hydraulic pump 1241 are changed by adjusting the speed of the hydraulic pump 1241, thereby realizing the power control of the underwater equipment. By adjusting the speed of the electric motor 112, the power source system can be precisely controlled, achieving the purpose of energy saving and high efficiency.

[0058] Optionally, to ensure the stable operation of the test system and its normal operation, a filter unit is provided between the connection lines of the frequency converter 101 and the motor 112.

[0059] Optionally, in actual use, after the frequency converter 101 is filtered by the filter unit, it needs to be transmitted over a long distance via a cable. Therefore, when the test system is tested, an additional cable model will be designed to simulate the cable environment used in the underwater environment, so as to make the final test results more realistic.

[0060] In this embodiment, when the hydraulic unit 124 and the generator 125 are working normally, the frequency converter 101 transmits three-phase voltage to the motor 112. In order to improve the quality of the output power of the frequency converter 101, the frequency converter 101 can be connected to a filter unit. The three-phase voltage output by the frequency converter 101 is filtered by the filter unit to remove noise or interference before the output power is provided to the motor 112.

[0061] It should be noted that the live wire and neutral wire in the three-phase power supply 101 correspond to the positive and negative terminals of the DC braking power supply 111, so that the switching unit 121 can switch operating conditions.

[0062] Optionally, the generator 125 can be connected to a three-phase resistive load to receive the electrical energy output by the generator 125. The generator 125 can also be connected to a four-quadrant frequency converter to feed the generated electrical energy back to the power grid. By using the generator 125 as a load for the hydraulic motor 1242, some electrical energy can be recovered while testing is being carried out, thus achieving the purpose of energy saving.

[0063] In some embodiments, the power simulation device 10 includes a variable frequency power supply 101 and a motor 112, wherein the variable frequency power supply 101 generates electricity and transmits electrical signals to the motor 112.

[0064] The power simulation device 10 is used to simulate providing power to underwater equipment. In this application, in order to simulate the real working conditions of the underwater environment as much as possible, see [link to relevant documentation]. Figure 2 The hydraulic unit 124 is used to simulate the large starting load of underwater equipment in an underwater environment. The electric motor 112 converts electrical energy into mechanical energy and transmits it to the hydraulic unit 124.

[0065] Due to the high pressure and low temperature in the complex underwater environment, the hydraulic oil viscosity is high. The adverse effect of the high pressure and high viscosity of the hydraulic oil is that the starting load of the electric motor is large, making it difficult to start. Therefore, hydraulic unit 124 is used to simulate the load and realize the simulation of large load starting.

[0066] High-load starting involves both a large load and a large moment of inertia. During the starting phase of the motor 112, a large load cannot be applied when the motor 112 is not rotating. Therefore, the hydraulic unit 124 serves as the load for the entire underwater power source, including the hydraulic pump 1241 and the hydraulic motor 1242. The hydraulic pump 1241 receives the mechanical energy output from the motor 112 and converts it into hydraulic energy, while the hydraulic motor 1242 converts the hydraulic energy into mechanical energy. In operation, the viscosity of the hydraulic oil is increased to increase the moment of inertia during starting, simulating the problem of a large starting load in the actual underwater environment. After simulating the load of the underwater power source, the digital testing system provided in this application can be used to test and verify the underwater power source.

[0067] In some embodiments, the power simulation device 10 and the braking simulation device 11 can also be a power system consisting of a DC power supply, an inverter, an umbilical cable unit, and a motor. In actual underwater operation, the umbilical cable drives the motor and then drives the hydraulic load. Since the umbilical cable is hundreds or even thousands of meters long, the cable resistance increases, leading to a larger voltage drop. In particular, the motor voltage may be insufficient when starting or under heavy load. Therefore, in order to consider the impact of long cables on the underwater power source, the DC power supply outputs power through the inverter and inputs frequency-converted power to the motor through the umbilical cable unit. The umbilical cable unit adopts an existing cable model suitable for the underwater environment, and its parameters can be set and modified through existing software. Users can test whether the deep-water power source can stably cope with braking conditions under different cable models.

[0068] In some embodiments, the braking simulation device may include a DC braking power supply and a braking resistor, which are used to consume the braking energy when the electric motor brakes, thereby simulating the braking condition.

[0069] In some embodiments, the deep-water (underwater) environment may include not only high pressure and low temperature, but also conditions such as water flow velocity disturbances, complex underwater geological environments, and temperature variations. To simulate a real underwater environment, the testing system can introduce random disturbance signals to simulate the underwater environment and achieve digital testing of the deep-water power source. Since water flow velocity disturbances can cause current and load fluctuations, this application can simulate the impact of water flow by simulating current and load fluctuations.

[0070] In some embodiments, a random disturbance signal can be generated by a hydraulic unit to simulate load fluctuations, or a variable resistor can be connected to the generator to apply a random disturbance signal to simulate the interference of ocean temperature or external environment on the load size. The load fluctuation can be simulated by changing the resistance value of the variable resistor.

[0071] Since temperature changes in the underwater environment can cause changes in the internal resistance of the DC braking power supply or the resistance value of the braking resistor, thereby changing the power output or resistance power rating of the DC braking power supply, the impact of temperature changes on energy-consuming braking during underwater braking can be simulated based on the changes in power passing through the braking source.

[0072] When the braking source is a DC braking power supply, the internal resistance of the DC braking power supply is related to the underwater temperature. The temperature generates a low random signal to simulate the low temperature and instability of the underwater environment. Thus, when the random signal acts on the DC braking power supply, it will change its internal resistance. When the internal resistance changes, the power output of the DC braking power supply will also change (for example, when the temperature is low, the internal resistance increases and the output power will decrease). Therefore, the control platform can simulate the impact of underwater temperature changes on energy-consuming braking during underwater braking.

[0073] When the braking source is a braking resistor, the resistance value of the braking resistor is related to the underwater temperature. The temperature generates a low random signal to simulate the low temperature and instability of the underwater environment. Thus, when the random signal acts on the braking resistor, it will change its resistance value. When the resistance value changes, the resistance power rating of the braking resistor will also change. Therefore, the control platform can simulate the impact of underwater temperature changes on energy-consuming braking during underwater braking.

[0074] When the braking source is a DC braking power supply and a braking resistor connected in series, the resistance value of the braking resistor and the internal resistance of the DC braking power supply are both related to the underwater temperature. The temperature generates a low random signal to simulate the low temperature and instability of the underwater environment. Thus, when the random signal is applied to the braking resistor and the DC braking power supply, it will change their resistance value. When the resistance value changes, the power output of the DC braking power supply will change accordingly. Therefore, the control platform can simulate the impact of underwater temperature changes on energy-consuming braking during underwater braking.

[0075] After regenerative braking, electrical parameters related to the deep-water power source (such as three-phase voltage, three-phase current, speed, back electromotive force, electromagnetic torque, DC bus voltage, braking time, braking current, etc.) can be collected by the acquisition unit. These parameters are related to the DC power supply, inverter, umbilical cable unit, and motor. Based on these parameters, it is possible to analyze where the underwater power source is experiencing problems under braking conditions, providing data reference for the design of the deep-water power source system. It also provides a reliable basis for optimizing and improving the performance of the deep-water power source system. When problems occur, it is convenient for engineers to adjust parameters and retest until a stable, safe, and reliable underwater power source system is tested.

[0076] Specifically, during braking, one can observe whether the motor speed can successfully decrease without reversal or strong vibration, thus verifying whether the braking is smooth and effective.

[0077] By observing whether the current (e.g., stator three-phase current, cable front current (i.e., the current input to the umbilical cable unit), cable back current (i.e., the current output by the umbilical cable unit)) is within the set range, whether there is overcurrent, and whether the fluctuation is too large, it can be verified whether the current falls within the safe range.

[0078] By observing whether there is voltage across the braking resistor and whether current actually flows into the resistor, we can verify whether the braking energy is effectively dissipated.

[0079] Verify that the electrical parameters meet the requirements by observing whether the braking time, DC bus voltage, and maximum current value meet the expectations or are within the design specifications.

[0080] The testing method for the braking condition of the deep-water power source provided in this application, such as... Figure 4As shown, this method can be applied to the testing system for the braking condition of the deep-water power source provided in the above embodiments. The testing system includes: a power simulation device, a braking simulation device, and a testing device. The testing device can store control codes in the control unit or storage device of the testing device, which are then read and called by the control chip in the control unit to implement the corresponding testing method in conjunction with the corresponding hardware. Specifically, the testing method for the braking condition of the deep-water power source may include:

[0081] S01, after the power simulation device has been running for a preset time, the control test device switches the working kinetic energy provided by the power simulation device to the braking kinetic energy provided by the braking simulation device.

[0082] S02: After the braking kinetic energy supplies power to the underwater equipment, the electrical parameters output by the braking simulation device are collected, and the electrical parameters are used to verify the system performance of the deep-water power source under braking conditions.

[0083] The testing method for the braking condition of a deep-sea power source provided in this application embodiment involves switching the working kinetic energy to braking kinetic energy after the power simulation device has been running for a preset time. Then, the electrical parameters output by the braking simulation device are collected, and the system performance of the deep-sea power source under the braking condition is measured by analyzing the electrical parameters. This provides data reference for the system design of actual underwater power sources and further enables accurate verification of the overall system performance of the underwater power source under the braking condition.

[0084] In some embodiments, electrical parameters include at least one of current, voltage, and power, such as Figure 5 As shown, the steps for verifying the system performance of a deep-water power source under braking conditions using electrical parameters can be as follows:

[0085] S1, after the power simulation device has been running for a preset time, the control test device switches the working kinetic energy provided by the power simulation device to the braking kinetic energy provided by the braking simulation device.

[0086] S2 collects the electrical parameters output by the braking simulation device after the braking kinetic energy supplies power to the underwater equipment, and uses the electrical parameters to verify the system performance of the deep-water power source under braking conditions.

[0087] S3 determines whether the values ​​of current, voltage, and power parameters meet the threshold range.

[0088] S4. If the threshold range is met, the system performance of the deep-water power source is determined to be stable under the current braking condition.

[0089] S5. If the threshold range is not met, adjust the power simulation device or braking simulation device according to the electrical parameters until the electrical parameters output by the power source system under the current braking condition meet the threshold range.

[0090] In this embodiment of the application, before performing energy-consuming braking on the underwater power source / underwater equipment, the underwater power source / underwater equipment needs to be running normally, such as for 2.5 seconds, before entering the energy-consuming braking operation / condition. This is done to ensure the accuracy of the system performance test under braking conditions.

[0091] In some embodiments, the current (e.g., stator three-phase current, cable front current (i.e., the current input to the umbilical cable unit), cable rear current (i.e., the current output by the umbilical cable unit)) is determined to be within a set range, whether there is overcurrent, and whether the fluctuation is too large, thus verifying whether the current falls within the safe range; the voltage is determined to confirm whether the current actually flows into the resistor, thus verifying whether the braking energy is effectively dissipated; and the braking time, DC bus voltage, and maximum current value are determined to be in line with expectations or within the design specifications, thus verifying whether the electrical indicators meet the requirements.

[0092] In some embodiments, the threshold range is determined by the user based on the actual application scenario and is not limited here.

[0093] In some embodiments, when the measured electrical parameters do not meet the threshold range, the power simulation device or braking simulation device can be modulated and adjusted to simulate how parameters are adjusted under different braking conditions to ensure the stable operation of the deep-water power source (underwater power source).

[0094] Optionally, the test conditions provided in this embodiment, in addition to braking conditions, may also include other conditions such as sudden load changes and stall. The test method provided in this application can use electrical parameters to verify the performance of other conditions. The test method provided in this application uses the acquisition of electrical parameters to verify the performance of the underwater power source under braking conditions in complex underwater environments, providing data reference for power source system design and performance optimization.

[0095] This invention also provides an electronic device, such as... Figure 6 As shown, the electronic device may include a controller 21 and a memory 20, wherein the controller 21 and the memory 20 may be connected via a bus or other means. Figure 6 Taking the example of a connection between China and Israel via a bus.

[0096] The controller 21 can be a central processing unit (CPU). The controller 21 can also be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or combinations of the above types of chips.

[0097] Memory 20, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs, non-transitory computer-executable programs, and modules, such as the program instructions / modules / devices corresponding to the test method for the braking condition of the deep-water power source in this embodiment of the invention (e.g., Figure 1 The power simulation device 10, braking simulation device 11, and testing device 12 are shown. The controller 21 executes various functional applications and data processing by running non-transient software programs, instructions, and modules stored in the memory 20, thereby realizing the testing method for the braking condition of the deep-water power source in the above method embodiment.

[0098] The memory 20 may include a program storage area and a data storage area. The program storage area may store the operating system and applications required for at least one function; the data storage area may store data created by the controller 21, etc. Furthermore, the memory 20 may include high-speed random access memory and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some embodiments, the memory 20 may optionally include memory remotely located relative to the controller 21, and these remote memories may be connected to the controller 21 via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0099] The one or more modules are stored in the memory 20, and when executed by the controller 21, they perform actions such as... Figures 4 to 5 The method for testing the braking condition of the deep-water power source in the illustrated embodiment.

[0100] For specific details regarding the aforementioned electronic devices, please refer to the relevant documentation. Figures 4 to 5 The relevant descriptions and effects in the illustrated embodiments are for understanding purposes only and will not be repeated here.

[0101] 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 hardware related to computer program instructions. The program can be stored in a computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. The storage medium can be a magnetic disk, optical disk, read-only memory (ROM), random access memory (RAM), flash memory, hard disk drive (HDD), or solid-state drive (SSD), etc.; the storage medium can also include combinations of the above types of memory.

[0102] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A testing system for the braking condition of a deep-water power source, characterized in that, The testing system includes: A power simulation device is used to simulate a power source providing normal working kinetic energy to underwater equipment. The power simulation device includes: a frequency converter for outputting three-phase voltage. A braking simulation device is used to simulate a braking source providing braking kinetic energy to an underwater device during energy-consuming braking. The braking simulation device includes: a DC braking power supply for outputting DC voltage. Both the power simulation device and the braking simulation device include: The electric motor is selectively connected to either the variable frequency power supply or the DC braking power supply. When the electric motor is connected to the variable frequency power supply, it receives the three-phase voltage output by the variable frequency power supply and converts the three-phase voltage into the working kinetic energy; or when the electric motor is connected to the DC braking power supply, it receives the DC voltage output by the DC braking power supply and converts the DC voltage into the braking kinetic energy. A testing device is connected to the power simulation device and the braking simulation device. The testing device is used to switch the working kinetic energy provided by the power simulation device to the braking kinetic energy provided by the braking simulation device during energy consumption braking. After the braking kinetic energy supplies power to the underwater equipment, the testing device collects the electrical parameters output by the braking simulation device and uses the electrical parameters to verify the system performance of the deep-water power source under braking conditions. The testing device includes a switching unit, which is selectively connected between the motor and the frequency converter and the DC braking power supply, for switching the working kinetic energy to the braking kinetic energy, or switching the braking kinetic energy to the working kinetic energy. The switching unit includes: a first input line, a second input line, a third input line, a fourth input line, a fifth input line, a first output line, a second output line, a third output line, a first switching switch, a second switching switch, and a third switching switch; The first end of the first input line is connected to the first phase of the frequency converter, the first end of the second input line is connected to the second phase of the frequency converter, the first end of the third input line is connected to the third phase of the frequency converter, the second end of the first input line is connected to the first end of the first switching switch, the second end of the second input line is connected to the first end of the second switching switch, and the second end of the third input line is connected to the first end of the third switching switch. The first end of the fourth input line is connected to the first end of the DC braking power supply, the first end of the fifth input line is connected to the second end of the DC braking power supply, the second end of the fourth input line is connected to the second end of the first switching switch, and the second end of the fifth input line is connected to the second end of the second switching switch. The first end of the first output line is connected to the third end of the first switch, the first end of the second output line is connected to the third end of the second switch, the first end of the third output line is connected to the second end of the third switch, and the second ends of the first output line, the second output line, and the third output line are all connected to the motor.

2. The testing system for the braking condition of the deep-water power source according to claim 1, characterized in that, The testing apparatus includes: A data acquisition unit is connected between the switching unit and the motor, and is used to acquire the electrical parameters output by the switching unit; The control unit, connected to the switching unit and the acquisition unit, is used to control the switching unit to switch the working kinetic energy to braking kinetic energy, or to switch the braking kinetic energy to working kinetic energy, and to acquire the electrical parameters to verify the system performance of the deep-water power source under braking conditions.

3. The testing system for the braking condition of the deep-water power source according to claim 1, characterized in that, Also includes: A hydraulic unit, connected to the electric motor, is used to convert the working kinetic energy or braking kinetic energy output by the electric motor into mechanical energy; A generator, connected to the hydraulic unit, is used to convert the mechanical energy into electrical energy to power the underwater equipment.

4. The testing system for the braking condition of the deep-water power source according to claim 3, characterized in that, The hydraulic unit includes a hydraulic pump and a hydraulic motor.

5. The testing system for the braking condition of the deep-water power source according to claim 4, characterized in that, The testing system also includes a frequency converter, connected to the electric motor and the hydraulic motor, for adjusting the speed of the electric motor and the hydraulic pump.

6. The testing system for the braking condition of the deep-water power source according to claim 1, characterized in that, The testing system further includes a filter unit installed between the connection lines of the frequency converter and the motor.

7. A test method for the braking condition of a deep-water power source, characterized in that, The testing method for the braking condition of the deep-water power source is applied to the testing system for the braking condition of the deep-water power source according to any one of claims 1-6, and the testing method for the braking condition of the deep-water power source includes: After the power simulation device has been running for a preset time, the control and testing device will switch the working kinetic energy provided by the power simulation device to the braking kinetic energy provided by the braking simulation device. After the braking kinetic energy supplies power to the underwater equipment, the electrical parameters output by the braking simulation device are collected, and the electrical parameters are used to verify the system performance of the deep-water power source under braking conditions.

8. The test method for the braking condition of the deep-water power source according to claim 7, characterized in that, The electrical parameters include at least one of current, voltage, and power. Verifying the system performance of the deep-water power source under braking conditions using the electrical parameters includes: Determine whether the values ​​of the current, voltage, and power parameters meet the threshold range; If the threshold range is met, the system performance of the deep-water power source is determined to be stable under the current braking condition.

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