Turbine power generation system ground test power loading method, device, equipment and medium

Abstract

The application discloses a turbine power generation system ground test power loading method, device, equipment and medium, wherein the method carries out sudden loading at the slow vehicle speed in the test process, analyzes the possibility of the lowest speed, over-speed and over-torque of the sudden loading speed at high speed through the sudden loading test data at the slow vehicle speed, and continues to carry out higher speed test under the condition that the analysis risk is controllable; the method of adjusting the output DC voltage of the motor controller is used to solve the problem that the sudden loading is too large during the ground test, the engine stops and the test cannot continue, over-torque protection stop is realized through setting the current protection function of the motor controller, the over-speed risk is prevented by using the double protection mode of the over-voltage protection value of the generator controller and the torque-slope protection value of the engine, the engine and the generator are protected, sudden load change can be safely and reliably overcome at low cost, and the power loading test is successfully carried out.

Description

Technical Field

[0001] This application relates to the field of aerospace technology, and in particular to ground test power loading methods, apparatus, equipment and media for turbine power generation systems. Background Technology

[0002] Aviation hybrid systems, with aviation gas turbine power generation systems at their core, are a crucial pathway to achieving low-carbon, green, and intelligent aviation. The main components of an aviation gas turbine power generation system include a generator, a generator controller, and a gas turbine engine. For electric vertical takeoff and landing (EVTOL) aircraft and electric propeller fixed-wing aircraft, the gas turbine engine is typically a turboshaft engine. The turboshaft engine provides shaft power to drive the generator, which then rectifies the electricity to supply power to the aircraft. Currently, aviation gas turbine power generation systems are in the research and testing phase, lacking mature products. To complete ground component research and testing, high-power load cabinets or bidirectional DC power supplies are required to consume the power.

[0003] A bidirectional DC power supply is an advanced device based on power electronics technology and control algorithms (such as PWM rectification and bidirectional DC / AC conversion). It achieves bidirectional energy flow through a reversible switch: it can both supply DC power to a load and absorb DC power and efficiently feed it back to the grid, realizing energy recycling. Its core advantages lie in high efficiency and energy saving (feedback efficiency can reach over 95%, significantly reducing test energy consumption), high-precision programmable control, fast dynamic response, and flexible testing functions. Market research indicates that the average price of a high-power bidirectional DC power supply is currently around 10,000 RMB / kW. For megawatt and above high-power systems using bidirectional DC power supplies, the cost will reach tens of millions of RMB. Furthermore, as a load feeding back to the grid, a bidirectional DC power supply requires additional energy storage equipment to absorb excess energy, which is even more expensive. Currently, it is not feasible to use bidirectional DC power supplies for testing aviation gas turbine power generation systems.

[0004] The load cell converts electrical energy into heat through internal energy-consuming components (such as alloy resistors), simulating real electrical equipment. Based on Ohm's law, it controls the switching of switches (such as contactors and solid-state relays) to change the resistance of the connected circuit, thereby precisely controlling the total power consumption and verifying the load-carrying capacity, stability, and dynamic characteristics of the power generation system. The load cell is far less expensive than a DC power supply, the test bench only requires a placement area, and it is easy to move, making it ideal for testing aerospace gas turbine power generation systems.

[0005] The fuel control principle of turboshaft engines generally aims to maintain a constant power output shaft speed, ensuring the generator operates in its high-efficiency range. Current loading methods cause a sudden increase in drag torque under abrupt load on the aero-gas turbine generator system, leading to a drop in turbine speed. The turboshaft engine's constant-speed control system immediately detects this speed deviation and rapidly increases fuel supply, enhancing the energy flow of the gas to the turbine and significantly increasing its output torque. However, during the speed recovery process, overshoot occurs, exceeding the control target value. This can potentially cause excessively high generator controller voltage, triggering overvoltage protection, generator load shedding, and further increasing the speed, ultimately compromising generator integrity. Current technology lacks experimental methods for ground-based power loading of the turbine generator system under these conditions. Summary of the Invention

[0006] This application provides a ground test power loading method for turbine power generation systems, which solves the technical problems of existing technologies where sudden load increases cause over-torsion of the main shaft and overshoot during recovery, resulting in damage to the integrity of the generator.

[0007] This application is achieved through the following solution: A ground-based power loading method for turbine generator systems, applied to high-power load cabinets with multiple taps, includes the following steps: S1. System initialization, including preset load cabinet load P0 = load cabinet maximum gear, determine the DC output voltage control value U1 of the turbine generator system, determine the pressure build-up speed N1 of the turbine generator system, determine the turbine speed control target of the turboshaft engine power turbine, set the overspeed protection value Npm, the torque slope protection value Tm and the motor controller current protection value Im. S2, Start to idle speed N m At speed N1, the motor controller automatically completes the pressure build-up U1; S3. Select the power turbine speed Np control target as "low selection", switch to idle state, under the "low selection" condition, the load cabinet will gradually shift to the larger gear to the maximum actual power that the turboshaft engine can be loaded at this speed, and observe the speed fluctuation. S4. Observe the test data. During the test, if any of the Np overspeed protection value Npm, torque slope protection value Tm, or motor controller current protection value Im is triggered, reduce the voltage U1 to reduce the power load amplitude and repeat the above steps. If the Np fluctuation range is too large, reduce the voltage U1 or adjust the turboshaft engine control law to control the Np fluctuation range. S5. After the operation is stable, the voltage is gradually increased at preset intervals by controlling the motor controller of the vehicle platform. The fluctuation of the power turbine speed Np is observed. The voltage U2 is recorded when the voltage fluctuation is within the set normal range. When the voltage fluctuation exceeds the set normal range, proceed to the next step. S6. Increase the engine speed to N2 through the engine controller. N2 is the pre-set turbine generator speed, which is equal to the rated output speed of the engine and N2>N1. The vehicle control motor controller continues to increase the voltage to the test requirement voltage U3 at preset intervals. The load is applied in gears to the test requirement power P3. The fluctuation of the power turbine speed Np is observed. If the fluctuation of Np exceeds the set normal range, the next step should be directly entered. If the fluctuation of Np is within the set normal range, the test requirement power P3 is maintained until the test requirement dwell time is met before entering the next step. S7. The voltage is stepped down to U2 via the motor controller, and the speed is reduced to the idle speed. S8. Continue to reduce the voltage to U1 through the motor controller and stop the machine, where U1 < U2 < U3.

[0008] Furthermore, in step S1, when the preset load cabinet load P0 = the maximum load cabinet position, if there are multiple motor controllers, the preset load cabinet load P0 needs to consider the load sharing among multiple motor controllers.

[0009] Further, in step S1, the voltage control value U1 = k1 × U0 , where P max1 To determine the maximum power output permissible under sudden load at idle speed according to the characteristics of a turboshaft engine, P max1 ≤P0, U0 is the nominal voltage of the load cabinet, that is, the voltage at which the load cabinet achieves full load, k1 is the efficiency coefficient from the turboshaft engine to the load cabinet, with a value range of 0.70~0.98, and the control value of the output voltage of the vehicle control unit is set to U1.

[0010] Further, in step S1, when determining the pressure-building speed N1 of the turbine power generation system, N1 is the minimum speed required to meet the pressure-building conditions, specifically including the following steps: Power surge during voltage build-up (U1) 2 -U dc 2 ) / (U0 2 / P0)≤P max1 Among them, U dc The voltage before voltage build-up is an uncontrollable DC voltage, and U dc =2.7 KeπN1 / 60, where Ke is the back electromotive force constant; The minimum rotational speed N1 required to satisfy the pressure build-up condition can be obtained as follows: N1=k260(U1) 2 -(U0 2 / P0)P max1 ) 1 / 2 / (2.7 Keπ); Where k2 is the correction coefficient, and its value ranges from 0 to 1.

[0011] Furthermore, in step S1, when determining the target speed control of the turboshaft engine's power turbine, 50% to 80% of the design value of the power turbine speed Np is selected as the speed corresponding to the "low selection" state. By conducting "low selection" tests, the test risk is reduced. 100% of the design value of the power turbine speed Np is selected as the speed corresponding to the "high selection" state, providing a prerequisite for completing the power loading test. The target output speed of the turboshaft engine can be quickly adjusted by a speed selection switch. The speed selection switch has two states: "low selection" and "high selection". By switching the speed selection switch to the "low selection" state, the target output speed of the turboshaft engine is quickly adjusted to the speed corresponding to the "low selection" state. By switching the speed selection switch to the "high selection" state, the target output speed of the turboshaft engine is quickly adjusted to the speed corresponding to the "high selection" state.

[0012] Furthermore, in step S1, when setting the overspeed protection value Npm, torque slope protection value Tm, and motor controller current protection value Im, Npm is increased by 5% to 15% based on the target speed control of the power turbine, to prevent excessive speed increase when the generator loses load through fuel cut-off protection; the torque slope protection value Tm is further reduced by 5% to 15% based on the normal value of the torque change slope of the turboshaft engine; the motor controller current protection value Im is based on the strength limit capacity T of the engine power output shaft and the generator main shaft. eg confirm: Im=T eg ×V1 / (9550×U1) Where V1 is the engine's rated speed and 9550 is a constant.

[0013] Furthermore, in step S6, U3 = (P3 × R) 1 / 2 , where R is the total resistance of the load cabinet.

[0014] This application also provides a ground test power loading device for a turbine power generation system, including: The initialization module is used for system initialization, including setting the load of the load cabinet P0 = the maximum load level of the load cabinet, determining the DC output voltage control value U1 of the turbine generator system, determining the pressure build-up speed N1 of the turbine generator system, determining the turbine speed control target of the turboshaft engine power turbine, setting the overspeed protection value Npm, the torque slope protection value Tm, and the motor controller current protection value Im. The pressure build-up module is used to start the engine to idle speed N. m At speed N1, the motor controller automatically completes the pressure build-up U1; The low-selection loading module is used to select the power turbine speed Np control target as "low-selection" and switch to idle state. Under the "low-selection" condition, the load cabinet prioritizes and gradually shifts to the maximum actual power that the turboshaft engine can be loaded at that speed, and observes the speed fluctuation. The Np fluctuation control module is used to observe the test data. During the test, if any of the Np overspeed protection value Npm, torque slope protection value Tm, or motor controller current protection value Im is triggered, the voltage U1 is reduced to reduce the power loading amplitude, and the aforementioned steps are repeated. If the Np fluctuation range is too large, the voltage U1 is reduced, or the turboshaft engine control law is adjusted to control the Np fluctuation range. The first interval boosting operation module is used to gradually boost the voltage at preset intervals through the vehicle control motor controller after the operation is stable, observe the fluctuation of the power turbine speed Np, record the voltage U2 when the voltage fluctuation is within the set normal range, and proceed to the next step when the voltage fluctuation exceeds the set normal range. The second interval boost operation module is used to increase the speed to N2 through the engine controller. N2 is the pre-set turbine generator speed, which is equal to the rated output speed of the engine, and N2>N1. The vehicle control motor controller continues to boost the voltage to the test requirement voltage U3 according to the preset interval, and applies the load to the test requirement power P3 in gears. The fluctuation of the power turbine speed Np is observed. If the fluctuation of Np exceeds the set normal range, it should directly proceed to the next step. If the fluctuation of Np is within the set normal range, it continues to stay at the test requirement power P3 until the test requirement dwell time is met before proceeding to the next step. The step-down speed reduction module is used to step down the voltage to U2 via the motor controller, thereby reducing the speed to the idle speed. The parking module is used to further step down the voltage to U1 via the motor controller to stop the vehicle, where U1 < U2 < U3.

[0015] This application also provides an electronic device comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the aforementioned turbine power generation system ground test power loading method.

[0016] This application also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the described ground test power loading method for a turbine power generation system.

[0017] This application also provides a computer program product, including a computer program or computer-executable instructions, which, when executed by a processor, implement the aforementioned method for loading power for ground testing of a turbine power generation system.

[0018] Compared with the prior art, this application can produce the following beneficial effects: To address the current lack of dedicated load cells for testing aviation gas turbine generator systems, and the fact that existing high-power load cells typically have capacities of 100kW, 200kW, or even higher, which can easily cause sudden load changes and prevent ground power loading tests of aviation gas turbine generator systems, this application solves this problem through innovative test procedures and loading methods. In terms of the test procedure, the test first involves a sudden load at idle speed. The data from this idle speed sudden load test is used to analyze the minimum speed drop under high-speed sudden load, the possibility of over-revving, and over-torque. If the analysis shows the risks are controllable, higher speed tests can be continued. Regarding the loading method, an innovative approach is used to adjust the DC voltage output of the motor controller to solve the problem that excessive sudden loads during ground tests of aviation turbine generator systems can cause engine shutdown, making further testing impossible. This application innovatively sets up test protection measures, including innovatively setting the current protection function of the motor controller to realize over-torque protection shutdown, using the dual protection method of setting "generator controller overvoltage protection value + engine torque-slope protection value" to prevent over-speed risk, protect the engine and generator, and can solve the load change problem safely, reliably and cost-effectively, so as to ensure the smooth conduct of power loading test.

[0019] In addition to the purposes, features, and advantages described above, this application has other purposes, features, and advantages. A further detailed description of this application will be provided below with reference to the figures. Attached Figure Description

[0020] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein: Figure 1 This is a schematic diagram of the loading test of the aviation gas turbine power generation system of this application; Figure 2 This is a schematic flowchart of a preferred embodiment of the power loading method for a ground test of a turbine power generation system in this application; Figure 3 This is a schematic diagram of the loading positions of a certain model of load cell. Figure 4 This is a schematic diagram of the module of the ground test power loading device for the turbine power generation system according to a preferred embodiment of this application; Figure 5 This is a schematic block diagram of an electronic device according to a preferred embodiment of this application; Figure 6 This is a schematic diagram of the internal structure of a computer device according to a preferred embodiment of this application. Detailed Implementation

[0022] To better understand the technical solution of this application, a detailed description will be provided below in conjunction with the accompanying drawings and specific implementation methods.

[0023] It should be noted that the executing entity in this embodiment can be a computing service system with data processing, network communication, and program execution functions, such as a tablet computer, personal computer, or mobile phone, or a ground test power loading device for a turbine power generation system capable of performing the above functions. The following will refer to a ground test power loading device for a turbine power generation system (see...). Figure 1 Taking the execution subject as an example, this embodiment and the following embodiments will be described.

[0024] like Figure 2 As shown, to address the aforementioned technical problems, a preferred embodiment of this application provides a ground-based test power loading method for a turbine power generation system, applicable to a high-power load cabinet containing multiple speed ranges, comprising the following steps: S1. System initialization, including preset load cabinet load P0 = load cabinet maximum gear, determine the DC output voltage control value U1 of the turbine generator system, determine the pressure build-up speed N1 of the turbine generator system, determine the turbine speed control target of the turboshaft engine power turbine, set the overspeed protection value Npm, the torque slope protection value Tm and the motor controller current protection value Im. S2, Start to idle speed N m At speed N1, the motor controller automatically completes the pressure build-up U1; S3. Select the power turbine speed Np control target as "low selection", switch to idle state, under the "low selection" condition, the load cabinet will gradually shift to a larger gear (e.g. 200kW) to the maximum actual power that the turboshaft engine can be loaded at that speed, and observe the speed fluctuation. S4. Observe the test data. During the test, if any of the Np over-speed protection value Npm, torque slope protection value Tm, or motor controller current protection value Im is triggered, reduce the voltage U1 to reduce the power load amplitude and repeat the above steps. If the Np fluctuation exceeds the set normal range (±0.5%), reduce the voltage U1 or adjust the turboshaft engine control law to control the Np fluctuation range. S5. After the operation is stable, the voltage is gradually increased in 10V intervals by controlling the motor controller of the vehicle platform. The fluctuation of the power turbine speed Np is observed. The voltage U2 is recorded when the voltage fluctuation is within the set normal range (the absolute value of the voltage fluctuation is less than or equal to 10V). When the voltage fluctuation exceeds the set normal range (the absolute value of the voltage fluctuation is greater than 10V), proceed to the next step. S6. Increase the engine speed to N2 via the engine controller. N2 is the pre-set turbine generator speed, which is equal to the engine's rated output speed and N2 > N1. The vehicle control motor controller continues to increase the voltage to the test requirement voltage U3 at 10V intervals. The load is applied gear by gear to the test requirement power P3. The fluctuation of the power turbine speed Np is observed. If the fluctuation of Np exceeds the set normal range (absolute value of fluctuation is greater than 1%), proceed directly to the next step. If the fluctuation of Np is within the set normal range (absolute value of fluctuation is less than or equal to 1%), continue to stay at the test requirement power P3 until the test requirement dwell time is met before proceeding to the next step. S7. The voltage is stepped down to U2 via the motor controller, and the speed is reduced to the idle speed. S8. Continue to reduce the voltage to U1 through the motor controller and stop the machine, where U1 < U2 < U3.

[0025] Currently, high-power load banks are limited by cost-effectiveness and usage scenarios. The core logic of their load bank design is to cover the widest possible power range using as few load banks as possible through combinations. A common approach is a hybrid configuration, including basic load banks (e.g., 1kW, 2kW, 5kW) and high-power load banks (e.g., 200kW, 400kW). Fine-tuning is done using the basic load banks, and then the high-power load banks are used to quickly increase the load level. For example, a certain model of load bank might have 13 load banks for resistive loads: 1, 2, 2, 5, 10, 10, 20, 50, 100, 200, 200, 200, 200 kW. Figure 3As shown, this includes five high-power settings, totaling up to 900kW. However, using a high-power setting on the load cabinet can cause a sudden, instantaneous load increase. Currently, there is a lack of dedicated load cabinets specifically designed for testing aviation gas turbine generator systems. Existing high-power load cabinets typically have settings of 100kW, 200kW, or even higher. These high-power settings can easily cause sudden load changes, making it impossible to conduct ground power loading tests on aviation gas turbine generator systems. This embodiment addresses this problem by innovatively designing the test procedure and loading method. In terms of the test procedure, a sudden load is first applied at idle speed. The data from this idle speed sudden load test is used to analyze the minimum speed drop under high-speed sudden load, the possibility of over-revving, and over-torque. If the analysis shows the risk is controllable, higher speed tests can be continued. Regarding the loading method, an innovative approach is used to adjust the DC voltage output of the motor controller to solve the problem that excessive sudden load during ground testing of aviation turbine generator systems can cause engine shutdown, preventing further testing. This application innovatively sets up test protection measures, including innovatively setting the current protection function of the motor controller to realize over-torque protection shutdown, using the dual protection method of setting "generator controller overvoltage protection value + engine torque-slope protection value" to prevent over-speed risk, protect the engine and generator, and can solve the load change problem safely, reliably and cost-effectively, so as to ensure the smooth conduct of power loading test.

[0026] Preferably, in step S1, when the preset load cabinet load P0 = the maximum load level of the load cabinet, if there are multiple motor controllers, the preset load cabinet load P0 needs to consider the load sharing of multiple motor controllers. The purpose is that the load sharing of multiple motor controllers can achieve uniform heating of the controllers, avoid local hot spots, and the total output of the system can reach the theoretical maximum value without the "weakest link" effect. If there are multiple motor controllers, in order to solve the load sharing problem, each motor controller is connected to an independent load cabinet separately and electrically isolated from each other. Therefore, the preset load cabinet load P0 should ensure that the load of each independent load cabinet is the same.

[0027] Preferably, in step S1, the voltage control value U1 = k1 × U0 , where P max1 To determine the maximum power output permissible under sudden load at idle speed according to the characteristics of a turboshaft engine, P max1 ≤P0, U0 is the nominal voltage of the load cabinet, that is, the voltage at which the load cabinet achieves full load. k1 is the efficiency coefficient from the turboshaft engine to the load cabinet, with a value range of 0.70~0.98. The purpose of setting the output voltage control value of the vehicle control unit to U1 is to ensure that the turboshaft engine can accept the instantaneous load surge of the motor controller building up the voltage U1.

[0028] Preferably, in step S1, when determining the pressure-building speed N1 of the turbine power generation system, N1 is the minimum speed required to meet the pressure-building conditions, specifically including the following steps: Power surge during voltage build-up (U1) 2 -U dc 2 ) / (U0 2 / P0)≤P max1 Among them, U dc The voltage before voltage build-up is an uncontrollable DC voltage, and U dc =2.7 KeπN1 / 60, where Ke is the back electromotive force constant; The minimum rotational speed N1 required to satisfy the pressure build-up condition can be obtained as follows: N1=k260(U1) 2 -(U0 2 / P0)P max1 ) 1 / 2 / (2.7 Keπ); Where k2 is the correction coefficient, and its value ranges from 0 to 1.

[0029] The pressure build-up speed N1 of the turbine generator system is the minimum speed required to meet the pressure build-up conditions. The lower the pressure build-up speed, the greater the sudden power change during pressure build-up, and the easier it is for the turbine engine to shut down. If the pressure build-up speed is too high, it can easily cause the power transistors of the motor controller to break down. Therefore, it is necessary to determine the pressure build-up speed of the turbine generator system.

[0030] Preferably, in step S1, when determining the target speed control of the turboshaft engine's power turbine, 50% to 80% of the design value of the power turbine speed Np is selected as the speed corresponding to the "low selection" state. By conducting "low selection" tests, the test risk is reduced. 100% of the design value of the power turbine speed Np is selected as the speed corresponding to the "high selection" state, providing a prerequisite for completing the power loading test. The target output speed of the turboshaft engine can be quickly adjusted by a speed selection switch. The speed selection switch has two states—"low selection" state and "high selection" state. By switching the speed selection switch to the "low selection" state, the target output speed of the turboshaft engine is quickly adjusted to the speed corresponding to the "low selection" state. By switching the speed selection switch to the "high selection" state, the target output speed of the turboshaft engine is quickly adjusted to the speed corresponding to the "high selection" state.

[0031] Preferably, in step S1, when setting the overspeed protection value Npm, torque slope protection value Tm, and motor controller current protection value Im, Npm is increased by 5% to 15% based on the target speed control of the power turbine, to prevent excessive speed increase when the generator loses load through fuel cut-off protection; the torque slope protection value Tm is further reduced by 5% to 15% based on the normal value of the torque change slope of the turboshaft engine, to enhance the protection effect during generator load loss; the motor controller current protection value Im is based on the strength limit capacity T of the engine power output shaft and the generator main shaft. egconfirm: Im=T eg ×V1 / (9550×U1) Where V1 is the rated engine speed, and 9550 is a constant. In this embodiment, the rated engine speed V1 = 20900.

[0032] In this embodiment, the motor controller current protection value Im is based on the strength limit T of the engine power output shaft and the generator main shaft. eg This confirms that the lack of torque protection capability in traditional turboshaft engines can be compensated for, thus preventing excessive over-torque in the shaft system.

[0033] Preferably, in step S6, U3 = (P3 × R) 1 / 2 Where R is the total resistance of the load cabinet, the load cabinet utilizes the remaining small gears (such as 10kW, 5kW, etc.), and P3 is the power required for the test. The purpose of calculating U3 using this formula is to obtain the value that the output voltage U3 of the motor controller needs to reach to meet the power requirements of the test.

[0034] Preferably, such as Figure 4 As shown, another embodiment of this application also provides a ground test power loading device for a turbine power generation system, including: The initialization module is used for system initialization, including setting the load of the load cabinet P0 = the maximum load level of the load cabinet, determining the DC output voltage control value U1 of the turbine generator system, determining the pressure build-up speed N1 of the turbine generator system, determining the turbine speed control target of the turboshaft engine power turbine, setting the overspeed protection value Npm, the torque slope protection value Tm, and the motor controller current protection value Im. The pressure build-up module is used to start the engine to idle speed N. m At speed N1, the motor controller automatically completes the pressure build-up U1; The low-selection loading module is used to select the power turbine speed Np control target as "low-selection" and switch to idle state. Under the "low-selection" condition, the load cabinet prioritizes and gradually shifts to the maximum actual power that the turboshaft engine can be loaded at that speed, and observes the speed fluctuation. The Np fluctuation control module is used to observe the test data. During the test, if any of the Np overspeed protection value Npm, torque slope protection value Tm, or motor controller current protection value Im is triggered, the voltage U1 is reduced to reduce the power loading amplitude, and the aforementioned steps are repeated. If the Np fluctuation range is too large, the voltage U1 is reduced, or the turboshaft engine control law is adjusted to control the Np fluctuation range. The first interval boosting operation module is used to gradually boost the voltage at preset intervals through the vehicle control motor controller after the operation is stable, observe the fluctuation of the power turbine speed Np, record the voltage U2 when the voltage fluctuation is within the set normal range, and proceed to the next step when the voltage fluctuation exceeds the set normal range. The second interval boost operation module is used to increase the speed to N2 through the engine controller. N2 is the pre-set turbine generator speed, which is equal to the rated output speed of the engine, and N2>N1. The vehicle control motor controller continues to boost the voltage to the test requirement voltage U3 according to the preset interval, and applies the load to the test requirement power P3 in gears. The fluctuation of the power turbine speed Np is observed. If the fluctuation of Np exceeds the set normal range, it should directly proceed to the next step. If the fluctuation of Np is within the set normal range, it continues to stay at the test requirement power P3 until the test requirement dwell time is met before proceeding to the next step. The step-down speed reduction module is used to step down the voltage to U2 via the motor controller, thereby reducing the speed to the idle speed. The parking module is used to further step down the voltage to U1 via the motor controller to stop the vehicle, where U1 < U2 < U3.

[0035] The ground test power loading device for a turbine power generation system provided in this embodiment adopts the ground test power loading method for a turbine power generation system in the above embodiments, solving the technical problems in the prior art where a sudden increase in load causes over-torque of the main shaft and overshoot during the recovery process, resulting in damage to the integrity of the generator. Compared with the prior art, the beneficial effects of the ground test power loading device for a turbine power generation system provided in this embodiment are the same as those of the ground test power loading method for a turbine power generation system provided in the above embodiments, and other technical features in the ground test power loading device for a turbine power generation system are the same as those disclosed in the methods of the above embodiments, and will not be repeated here.

[0036] like Figure 5 As shown, a preferred embodiment of this embodiment also provides an electronic device, 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 steps of the ground test power loading method for the turbine power generation system in the above embodiment.

[0037] This embodiment also provides an electronic device that uses the ground test power loading method for the turbine power generation system in the above embodiment to solve the technical problems in the prior art where a sudden increase in load causes over-torque of the main shaft and overshoot during the recovery process, resulting in damage to the integrity of the generator. Compared with the prior art, the beneficial effects of the electronic device provided in this embodiment are the same as those of the ground test power loading method for the turbine power generation system provided in the above embodiment. Furthermore, other technical features of the electronic device are the same as those disclosed in the method of the above embodiment, and will not be repeated here.

[0038] like Figure 6 As shown, a preferred embodiment of this application also provides a computer device, which may be a terminal or a liveness detection server, and its internal structure diagram may be as follows. Figure 6 As shown. The computer device includes a processor, memory, and a network interface connected via a system bus. The processor provides computing and control capabilities. The memory includes a non-volatile storage medium and internal memory. The non-volatile storage medium 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 medium. The network interface is used to communicate with other external computer devices via a network connection. When the computer program is executed by the processor, it implements the steps of the above-described method for applying power to a ground-based turbine power generation system.

[0039] Those skilled in the art will understand that Figure 6 The structure shown is merely a block diagram of a portion of the structure related to the solution of this embodiment, and does not constitute a limitation on the computer device to which the solution of this embodiment is applied. The specific computer device may include more or fewer components than shown in the figure, or combine certain components, or have different component arrangements.

[0040] The computer equipment provided in this embodiment adopts the ground test power loading method for the turbine power generation system in the above embodiment, which solves the technical problems of the prior art where the sudden increase in load causes the main shaft to over-torque and the overshoot during the recovery process causes damage to the integrity of the generator. Compared with the prior art, the beneficial effects of the computer equipment provided in this embodiment are the same as the beneficial effects of the ground test power loading method for the turbine power generation system provided in the above embodiment. In addition, other technical features in the electronic equipment are the same as the features disclosed in the method of the above embodiment, and will not be repeated here.

[0041] A preferred embodiment of this application also provides a storage medium, the storage medium including a stored program, which, when the program is executed, controls the device where the storage medium is located to perform the steps of the ground test power loading method for the turbine power generation system in the above embodiments.

[0042] It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and although a logical order is shown in the flowchart, in some cases the steps shown or described may be executed in a different order than that shown here.

[0043] If the functions described in this embodiment are implemented as software functional units and sold or used as independent products, they can be stored in one or more computing device-readable storage media. Based on this understanding, the parts of this embodiment that contribute to the prior art or the technical solution can be embodied in the form of a software product. This software product is stored in a storage medium and includes several instructions to cause a computing device (which may be a personal computer, server, mobile computing device, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this embodiment. The aforementioned storage media include: USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, optical disks, and other media capable of storing program code.

[0044] Those skilled in the art will understand that the embodiments of this example can be provided as methods, systems, or computer program products. Therefore, this example can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this example can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code. The solutions in this example can be implemented using various computer languages, such as the object-oriented programming language C++ and the embedded programming language C.

[0045] This embodiment is described with reference to flowchart illustrations and / or block diagrams of the method, apparatus (system), and computer program product according to this embodiment. It should be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations. Figure 1 One or more processes and / or boxes Figure 1 A system that specifies functions in one or more boxes.

[0046] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including an instruction set implemented in a process. Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0047] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0048] This embodiment also provides a computer program product, including a computer program that, when executed by a processor, implements the steps of the above-described method for loading power on a ground test of a turbine power generation system.

[0049] The computer program product provided in this embodiment solves the technical problem in the prior art where a sudden increase in load causes excessive spindle torque, and overshoot during the recovery process leads to damage to the generator integrity. Compared with the prior art, the beneficial effects of the computer program product provided in this embodiment are the same as those of the ground test power loading method for the turbine power generation system provided in the above embodiments, and will not be repeated here.

[0050] In summary, this application has the following characteristics: 1. Traditional aircraft turboshaft engine control systems do not have the function of directly protecting against shutdown when the torque value is too high. They only have the function of limiting refueling when the torque value is too high. However, after the turboshaft engine and generator are connected in series to form an aircraft gas turbine power generation system, the load of the turboshaft engine changes from the propeller to the generator rotor, and the moment of inertia is greatly reduced. Under sudden loading and other scenarios, the phenomenon of speed reduction and torque surge is more likely to occur. In order to protect the safety of the turboshaft engine during the test, it is necessary to protect against shutdown when the torque value is greater than a certain value. Therefore, the ground test of the aircraft turbine power generation system in this application utilizes the relationship between the torque and current of the motor controller and innovatively achieves over-torque protection shutdown by setting the current protection function of the motor controller.

[0051] 2. The engine controller performs PID closed-loop control of the engine speed based on the deviation between the target speed and the actual speed. It precisely adjusts the amount of fuel injected into the combustion chamber by controlling the opening of the fuel metering device to achieve stable speed. Under sudden load conditions, the actual speed of the aero-turbine turbine generator system decreases, and the controller rapidly increases the fuel injection quantity. This increased fuel quantity causes the gas turbine speed (ng) to rise rapidly, and the power turbine speed (np) also rises rapidly (posing a risk of over-revving). This leads to a rapid increase in the generator output voltage. If the voltage reaches the generator controller's protection value, it will trigger the generator controller's overvoltage protection. Overvoltage protection will cause the generator controller to jettison, which will further increase the actual speed and trigger the over-revving risk. Therefore, the setting of the generator controller's overvoltage protection value is crucial. Furthermore, the increase in actual speed will cause a decrease in torque, triggering the engine's torque-slope protection. Therefore, during the sudden load test of the aero-turbine generator system on the ground, this application innovatively utilizes a dual protection method of "generator controller overvoltage protection value + engine torque-slope protection value" to prevent the risk of over-revving and protect the engine and generator.

[0052] 3. To address the risks of over-torque and over-rotation during sudden loading during ground testing of aero-turbine power generation systems, in addition to the protections described in points 1 and 2, this application also innovates the testing procedure. The test is first conducted with sudden loading at idle speed. Data from the sudden loading test at idle speed is used to analyze the minimum speed to which the sudden loading speed drops at high speeds, the possibility of over-rotation and over-torque, etc. If the analysis shows the risks are controllable, higher speed tests are continued to ensure test safety.

[0053] 4. To address the issue of engine shutdown and inability to continue testing due to excessive sudden loading during ground testing of the aero-turbine generator system, this application innovatively employs a method of adjusting the DC output voltage of the motor controller. The motor controller first establishes a low voltage (e.g., 700VDC) at idle speed, then applies a full load (e.g., 1000kW) to the load cabinet, gradually increasing the voltage to an intermediate voltage (e.g., 800VDC), then increasing the speed to a high speed, and finally increasing the voltage to a high voltage (e.g., 920VDC). The actual load gradually increases to the rated power as the voltage increases. This solves the problem of engine shutdown due to excessive sudden loading, enabling the aero-turbine generator system to reach rated power during ground testing and completing related tests at rated power.

[0054] It has been demonstrated in power tests of an aviation megawatt turbine power generation system that the system successfully loaded megawatts of power.

[0055] Obviously, those skilled in the art can make various modifications and variations to this embodiment without departing from the spirit and scope of this embodiment. Therefore, if these modifications and variations of this embodiment fall within the scope of the claims of this embodiment and their equivalents, this embodiment is also intended to include these modifications and variations.

Claims

1. A ground-based test power loading method for a turbine power generation system, applied to a high-power load cabinet containing multiple taps, characterized in that... Including the following steps: S1. System initialization, including preset load cabinet load P0 = load cabinet maximum gear, determine the DC output voltage control value U1 of the turbine generator system, determine the pressure build-up speed N1 of the turbine generator system, determine the turbine speed control target of the turboshaft engine power turbine, set the overspeed protection value Npm, the torque slope protection value Tm and the motor controller current protection value Im. S2, Start to idle speed N m At speed N1, the motor controller automatically completes the pressure build-up U1; S3. Select the power turbine speed Np control target as "low selection", switch to idle state, under the "low selection" condition, the load cabinet prioritizes and gradually shifts to the maximum actual power that the turboshaft engine can be loaded at this speed, and observe the speed fluctuation. S4. Observe the test data. During the test, if any of the Np overspeed protection value Npm, torque slope protection value Tm, or motor controller current protection value Im is triggered, reduce the voltage U1 to reduce the power load amplitude and repeat the above steps. If the Np fluctuation range is too large, reduce the voltage U1 or adjust the turboshaft engine control law to control the Np fluctuation range. S5. After the operation is stable, the voltage is gradually increased at preset intervals by controlling the motor controller of the vehicle platform. The fluctuation of the power turbine speed Np is observed. The voltage U2 is recorded when the voltage fluctuation is within the set normal range. When the voltage fluctuation exceeds the set normal range, proceed to the next step. S6. Increase the engine speed to N2 through the engine controller. N2 is the pre-set turbine generator speed, which is equal to the rated output speed of the engine and N2>N1. The vehicle control motor controller continues to increase the voltage to the test requirement voltage U3 at preset intervals. The load is applied in gears to the test requirement power P3. The fluctuation of the power turbine speed Np is observed. If the fluctuation of Np exceeds the set normal range, the next step should be directly entered. If the fluctuation of Np is within the set normal range, the test requirement power P3 is maintained until the test requirement dwell time is met before entering the next step. S7. The voltage is stepped down to U2 via the motor controller, and the speed is reduced to the idle speed. S8. Continue to reduce the voltage to U1 through the motor controller and stop the machine, where U1 < U2 < U3.

2. The ground test power loading method for a turbine power generation system according to claim 1, characterized in that, In step S1, when the preset load cabinet load P0 = the maximum load level of the load cabinet, if there are multiple motor controllers, the preset load cabinet load P0 needs to take into account the load sharing of multiple motor controllers.

3. The ground test power loading method for a turbine power generation system according to claim 1, characterized in that, In step S1, the voltage control value U1 = k1 × U0 , where P max1 To determine the maximum power output permissible under sudden load at idle speed according to the characteristics of a turboshaft engine, P max1 ≤P0, U0 is the nominal voltage of the load cabinet, that is, the voltage at which the load cabinet achieves full load, k1 is the efficiency coefficient from the turboshaft engine to the load cabinet, with a value range of 0.70~0.98, and the control value of the output voltage of the vehicle control unit is set to U1.

4. The ground test power loading method for a turbine power generation system according to claim 1, characterized in that, In step S1, when determining the pressure build-up speed N1 of the turbine power generation system, N1 is the minimum speed required to meet the pressure build-up conditions. This specifically includes the following steps: Power surge during voltage build-up (U1) 2 -U dc 2 ) / (U0 2 / P0)≤P max1 Among them, U dc The voltage before voltage build-up is an uncontrollable DC voltage, and U dc =2.7 KeπN1 / 60, where Ke is the back electromotive force constant; The minimum rotational speed N1 required to satisfy the pressure build-up condition can be obtained as follows: N1=k260(U1 2 -(U0 2 / P0)P max1 ) 1 / 2 / (2.7 Keπ); Where k2 is the correction coefficient, and its value ranges from 0 to 1.

5. The ground test power loading method for a turbine power generation system according to claim 1, characterized in that, In step S1, when determining the target speed control of the turboshaft engine's power turbine, 50% to 80% of the design value of the power turbine speed Np is selected as the speed corresponding to the "low selection" state. By conducting "low selection" tests, the test risk is reduced. 100% of the design value of the power turbine speed Np is selected as the speed corresponding to the "high selection" state, providing a prerequisite for completing the power loading test.

6. The ground test power loading method for a turbine power generation system according to claim 1, characterized in that, In step S1, when setting the Np overspeed protection value Npm, the torque slope protection value Tm, and the motor controller current protection value Im, Npm is increased by 5% to 15% based on the power turbine speed control target. Through the oil cut-off protection method, excessive speed increase is avoided when the generator loses load. The torque slope protection value Tm is further reduced by 5% to 15% based on the normal value of the torque change slope of the turboshaft engine; the motor controller current protection value Im is based on the strength limit capacity T of the engine power output shaft and the generator main shaft. eg confirm: Im=T eg ×V1 / (9550×U1); Where V1 is the engine's rated speed and 9550 is a constant.

7. The ground test power loading method for a turbine power generation system according to claim 1, characterized in that, In step S6, U3 = (P3 × R) 1 / 2 , where R is the total resistance of the load cabinet.

8. A ground-based test power loading device for a turbine power generation system, characterized in that, include: The initialization module is used for system initialization, including setting the load of the load cabinet P0 = the maximum load level of the load cabinet, determining the DC output voltage control value U1 of the turbine generator system, determining the pressure build-up speed N1 of the turbine generator system, determining the turbine speed control target of the turboshaft engine power turbine, setting the overspeed protection value Npm, the torque slope protection value Tm, and the motor controller current protection value Im. The pressure build-up module is used to start the engine to idle speed N. m At speed N1, the motor controller automatically completes the pressure build-up U1; The low-selection loading module is used to select the power turbine speed Np control target as "low-selection" and switch to idle state. Under the "low-selection" condition, the load cabinet prioritizes and gradually shifts to the maximum actual power that the turboshaft engine can be loaded at that speed, and observes the speed fluctuation. The Np fluctuation control module is used to observe the test data. During the test, if any of the Np overspeed protection value Npm, torque slope protection value Tm, or motor controller current protection value Im is triggered, the voltage U1 is reduced to reduce the power loading amplitude, and the aforementioned steps are repeated. If the Np fluctuation range is too large, the voltage U1 is reduced, or the turboshaft engine control law is adjusted to control the Np fluctuation range. The first interval boosting operation module is used to gradually boost the voltage at preset intervals through the vehicle control motor controller after the operation is stable, observe the fluctuation of the power turbine speed Np, record the voltage U2 when the voltage fluctuation is within the set normal range, and proceed to the next step when the voltage fluctuation exceeds the set normal range. The second interval boost operation module is used to increase the speed to N2 through the engine controller. N2 is the pre-set turbine generator speed, which is equal to the rated output speed of the engine, and N2>N1. The vehicle control motor controller continues to boost the voltage to the test requirement voltage U3 according to the preset interval, and applies the load to the test requirement power P3 in gears. The fluctuation of the power turbine speed Np is observed. If the fluctuation of Np exceeds the set normal range, it should directly proceed to the next step. If the fluctuation of Np is within the set normal range, it continues to stay at the test requirement power P3 until the test requirement dwell time is met before proceeding to the next step. The step-down speed reduction module is used to step down the voltage to U2 via the motor controller, thereby reducing the speed to the idle speed. The parking module is used to further step down the voltage to U1 via the motor controller to stop the vehicle, where U1 < U2 < U3.

9. An electronic device, the electronic device comprising: A memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, when the processor executes the computer program, it implements the ground test power loading method for a turbine power generation system as described in any one of claims 1 to 7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the ground test power loading method for the turbine power generation system as described in any one of claims 1 to 7.

Images