Power hardware-in-loop simulation system and method of power system

Abstract

The embodiment of the invention relates to the field of aviation power system simulation testing, and discloses a power hardware-in-the-loop simulation system and method of a power system. The system comprises an upper computer subsystem used for building a power system simulation model and an interface model, issuing simulation test codes to a real-time simulation subsystem, controlling a power amplification subsystem and generating a simulation test result based on the state of a power hardware-in-loop simulation system in the simulation test process; the real-time simulation subsystem is used for simulating operation scenes of the power system simulation model and the interface model; the power amplification subsystem is used for performing signal conversion and transmission between the real-time simulation system and the tested hardware subsystem; the tested hardware subsystem is composed of a plurality of different secondary power supply subsystems, each secondary power supply subsystem comprises a switchboard box, a secondary power supply and a load, the types of the secondary power supplies in the different secondary power supply subsystems are different, simulation of multiple types of parts can be carried out, and the universality of the simulation system is improved.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of aviation power system simulation testing, and in particular to a power hardware-in-the-loop simulation system and method for a power system. Background Art

[0002] In order to ensure the stability of the power system, simulation tests need to be performed before the actual manufacturing of the system to reduce development risks. Fully digital simulation is usually used. However, with the increase in electrical equipment and the complexity of functions in the power system, it is difficult to fully simulate the real system using a full mathematical model for a complex system, so the confidence of full digital simulation is difficult to guarantee. At the same time, due to the complexity of the types of electrical equipment in the power system, the existing simulation models cannot meet the testing of multiple types of functions of complex devices. The versatility of the existing simulation models is poor, and multiple simulation models need to be built to adapt to the testing of different functions, which has problems such as high cost and poor timeliness. Summary of the invention

[0003] The purpose of the embodiment of the present invention is to provide a power hardware-in-the-loop simulation system and method for an electric power system, so that problems in the design of the electric power system can be discovered before actual manufacturing and real machine testing, and modifications and verifications can be made to reduce development risks. This saves time and costs and shortens the development cycle. In addition, simulation tests can be performed on different types of secondary power supplies in the electric power system, and the simulation system has strong test versatility.

[0004] To solve the above technical problems, an embodiment of the present invention provides a power hardware-in-the-loop simulation system for an electric power system, comprising: a host computer subsystem, used to build a power system simulation model and an interface model, send simulation test codes to a real-time simulation subsystem, control a power amplification subsystem, and generate simulation test results based on the state of the power hardware-in-the-loop simulation system during the simulation test; a real-time simulation subsystem, used to simulate the operating scenarios of the power system simulation model and the interface model; a power amplification subsystem, used to perform signal conversion and transmission between the real-time simulation system and the hardware subsystem under test; the hardware subsystem under test is composed of a plurality of different secondary power subsystems, each secondary power subsystem comprising: a distribution panel box, a secondary power supply and a load, and the secondary power supply types in different secondary power subsystems are different.

[0005] An embodiment of the present invention also provides a power hardware-in-the-loop simulation method for an electric power system, which is applied to the power hardware-in-the-loop simulation system of the above-mentioned electric power system. The method includes: building a power system simulation model and an interface model through a host computer subsystem; controlling a real-time simulation subsystem and a power amplification subsystem according to different test configuration parameters; and recording test results of multiple different secondary power subsystems under different test configuration parameters.

[0006] Compared with the prior art, the embodiment of the present invention includes a real-time simulation subsystem and a tested hardware subsystem in the system. Through the combination of simulation software and hardware components, the working state of the hardware components in the actual working environment can be tested more realistically, thereby improving the reliability and accuracy of the test. This allows problems in the power system design to be discovered before actual manufacturing and real machine testing, and modifications and verifications can be made to reduce development risks. This saves time costs and shortens the development cycle. In addition, since the tested hardware subsystem in the simulation system is composed of multiple different secondary power subsystems, simulation tests can be performed on different types of secondary power supplies in the power system, and the simulation system has a strong test versatility.

[0007] In addition, the host computer subsystem consists of real-time simulation management software and power amplifier control software; the real-time simulation management software is used to configure and send simulation test codes to the real-time simulation subsystem; the power amplifier control software is used to remotely control the configuration parameter settings of the power amplifier in the power amplifier subsystem.

[0008] In addition, the power amplification subsystem is composed of multiple four-quadrant power amplifiers and parallel cabinets; the four-quadrant power amplifier is used to convert the voltage signal sent by the real-time simulation subsystem into a real voltage and transmit it to the hardware subsystem under test, and / or, to convert the received real current into a current signal and return it to the real-time simulation subsystem; the parallel cabinet is used to adjust the parallel mode of the multiple four-quadrant power amplifiers to change the output voltage.

[0009] In addition, the secondary power supply includes: an autotransformer rectifier ATRU, a transformer rectifier TRU, and / or an autotransformer ATU; the autotransformer rectifier ATRU is used to convert an AC voltage into a first DC voltage; the transformer rectifier TRU is used to convert an AC voltage into a second DC voltage; wherein the first DC voltage is higher than the second DC voltage; and the autotransformer ATU is used to convert the voltage value of the AC voltage.

[0010] In addition, the first DC voltage is 540VDC; the second DC voltage is 28VDC; and the autotransformer ATU is used to convert 115VAC into 230VAC.

[0011] In addition, the power hardware-in-the-loop simulation system of the electric power system further includes: a switch, which is used to connect the host computer subsystem, the real-time simulation subsystem and the power amplification subsystem.

[0012] In addition, the power hardware-in-the-loop simulation system of the power system also includes: a conditioning box, which is used to convert the output voltage of the hardware subsystem under test into a voltage signal within a preset range, and send the voltage signal within the preset range to the real-time simulation subsystem.

[0013] Additionally, the preset range is -16V to 16V.

[0014] In addition, before building the power system simulation model and interface model through the upper computer subsystem, it also includes: building a full digital simulation model based on the hardware information in the hardware subsystem under test; after the test results of the full digital simulation model are passed, building the power system simulation model and interface model based on the full digital simulation model. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0016] Figure 1 is a schematic diagram of the structure of a power hardware-in-the-loop simulation system for an electric power system according to an embodiment of the present invention;

[0017] Figure 2 2 is a schematic diagram of the structure of a host computer subsystem of a power hardware-in-the-loop simulation system for an electric power system according to an embodiment of the present invention;

[0018] Figure 3 is a structural schematic diagram of a real-time simulation subsystem of a power hardware-in-the-loop simulation system of an electric power system according to an embodiment of the present invention;

[0019] Figure 4 is a schematic structural diagram of a power amplification subsystem of a power hardware-in-the-loop simulation system of an electric power system according to an embodiment of the present invention;

[0020] Figure 5 is a schematic structural diagram of a hardware subsystem under test in a power hardware-in-the-loop simulation system of an electric power system according to an embodiment of the present invention;

[0021] Figure 6 is a schematic diagram of the structure of another power hardware-in-the-loop simulation system for an electric power system according to an embodiment of the present invention;

[0022] Figure 7 is a flow chart of a power hardware-in-the-loop simulation method for an electric power system according to an embodiment of the present invention;

[0023] Figure 8 is a schematic diagram of the architecture of a fully digital simulation model according to an embodiment of the present invention;

[0024] Fig. 9 Schematic diagram of the architecture of a real-time simulation subsystem according to an embodiment of the present invention. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, it will be appreciated by those skilled in the art that in the embodiments of the present invention, many technical details are provided to enable the reader to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical scheme claimed in the present application can be implemented.

[0026] The following embodiments are divided for the convenience of description and shall not constitute any limitation on the specific implementation of the present invention. The embodiments may be combined with each other and referenced to each other without contradiction.

[0027] The embodiment of the present invention relates to a power hardware-in-the-loop simulation system for an electric power system, comprising: a host computer subsystem, which is used to build a power system simulation model and an interface model, send simulation test codes to a real-time simulation subsystem, control a power amplifier subsystem, and generate simulation test results based on the state of the power hardware-in-the-loop simulation system during the simulation test; a real-time simulation subsystem, which is used to simulate the operation scenarios of the power system simulation model and the interface model; a power amplifier subsystem, which is used to perform signal conversion and transmission between the real-time simulation system and the hardware subsystem under test; the hardware subsystem under test is composed of a plurality of different secondary power supply subsystems, each of which includes: a distribution panel box, a secondary power supply and a load, and the types of secondary power supplies in different secondary power supply subsystems are different. The working states of multiple types of components in an actual working environment can be simulated to improve the versatility of the simulation system. The implementation details of the power hardware-in-the-loop simulation system of the electric power system of this embodiment are specifically described below. The following content is only for the convenience of understanding the implementation details provided, and is not necessary for the implementation of this solution.

[0028] The power hardware-in-the-loop simulation system of the power system in this embodiment is as follows Figure 1 As shown, it specifically includes: a host computer subsystem 10, which is used to build a power system simulation model and an interface model, send simulation test codes to the real-time simulation subsystem 20, control the power amplifier subsystem 30, and generate simulation test results based on the state of the power hardware-in-the-loop simulation system during the simulation test; the real-time simulation subsystem 20, which is used to simulate the operation scenarios of the power system simulation model and the interface model; the power amplifier subsystem 30, which is used to perform signal conversion and transmission between the real-time simulation system 10 and the hardware subsystem 30 under test; the hardware subsystem 40 under test is composed of a plurality of different secondary power subsystems (including at least a secondary power subsystem 41 and a secondary power subsystem 42), and the secondary power types in different secondary power subsystems are different.

[0029] The following is a detailed introduction to the different subsystems in the power hardware-in-the-loop simulation system of the power system:

[0030] The host subsystem consists of a high-performance development host and a high-resolution display. The high-performance development host is used for the offline design and development of the power system simulation model of the entire process and the interface model development of the power hardware-in-the-loop simulation. The high-resolution display is used to display the model building interface and display the corresponding response content based on the operation of the host. Figure 2 As shown, the host computer subsystem 10 also includes a real-time simulation management software 11 and a power amplifier control software 12. The real-time simulation management software 11 is used to configure and send the simulation test code to the real-time simulation subsystem 20. The real-time simulation management software 11 controls the compilation, downloading, operation, setting, parameter adjustment, monitoring, etc. of the power system simulation model. The power amplifier control software 12 is used to remotely control the configuration parameter settings of the power amplifier in the power amplifier subsystem 30, and specifically controls the parallel mode, gear setting, parameter setting and other functions of the power amplifier. The power amplifier control software used here can be set accordingly based on the type of the power amplifier. For example, when the power amplifier is a four-quadrant power amplifier, the power amplifier control software is the corresponding four-quadrant power amplifier control software. In addition, the host computer subsystem not only runs the real-time simulation management software and the four-quadrant power amplifier control software, but also monitors the entire dynamic change process of the system in real time.

[0031] like Figure 3 As shown, the real-time simulation subsystem 20 includes a real-time simulation machine, which is composed of a power system simulation model 21, an interface model 22, and an optical module 23. In addition, the real-time simulation subsystem also includes components such as an analog output board and an analog input board. The real-time simulation subsystem is used to realize the real-time operation of the power system simulation model and the interface model on the real-time simulation system, thereby ensuring the real-time performance of the dynamic simulation of the power hardware-in-the-loop simulation system of the power system. The real-time simulation subsystem uses a combination of a real-time operating system and real-time simulation management software to achieve high-performance, high-speed, and high-precision real-time calculations. While ensuring the real-time performance of the simulation, it also ensures that the system can perform high-precision data calculations in the correct timing to ensure the correctness of the simulation results.

[0032] like Figure 4As shown, the power amplifier subsystem 30 is composed of a plurality of four-quadrant power amplifiers 31 and a parallel cabinet 32. The four-quadrant power amplifier 31 and the parallel cabinet 32 ​​are connected by an internal interconnection cable. The four-quadrant power amplifier is externally connected to a 380V power supply, which is used to convert the voltage signal sent by the real-time simulation subsystem into a real voltage and transmit it to the hardware subsystem under test, and / or, to convert the received real current into a current signal and return it to the real-time simulation subsystem. Since the four-quadrant power amplifier has a fast voltage rise rate, the conversion of the voltage signal can be quickly realized. In addition, high-speed optical fiber can also be used to communicate between the real-time simulation subsystem and the power amplifier subsystem, and such a communication method can almost ignore the time spent from the real-time simulation subsystem sending the voltage signal to the power amplifier subsystem receiving the voltage signal. Generally speaking, the time for the voltage signal sent by the real-time simulation subsystem, the signal conversion by the power amplifier subsystem and the transmission to the hardware subsystem under test can be almost ignored, which ensures the real-time performance and high-speed response dynamic characteristics of the power hardware in the loop simulation system. In addition, the four-quadrant power amplifier has the advantage of high precision. When used as a source, the amplified voltage waveform has little noise and high accuracy. Therefore, the voltage signal sent by the real-time simulation subsystem can be quickly output as a power level voltage and applied to the hardware subsystem under test by using the four-quadrant power amplifier. The real current can also be converted into a current signal and uploaded to the real-time simulation subsystem for closed-loop control. The parallel cabinet is used to adjust the parallel mode of multiple four-quadrant power amplifiers to change the output voltage. The parallel cabinet can select different working modes by switching different combinations of relays.

[0033] like Figure 5 As shown, the tested hardware subsystem 40 includes multiple secondary power subsystems (such as Figure 5 The secondary power subsystem A41, secondary power subsystem B42 and secondary power subsystem C43 are shown. Each secondary power subsystem includes: a distribution panel box, a secondary power supply and a load, and the secondary power supply types in different secondary power subsystems are different. The three secondary power subsystems can perform hardware-in-the-loop simulation tests at the same time, that is, single-channel power hardware-in-the-loop can be performed at the same time.

[0034] Different secondary power subsystems have different working environments and working states. The following is a specific description of the secondary power subsystems composed of different types of secondary power supplies:

[0035] The secondary power subsystem A consists of a distribution panel box, an autotransformer rectifier ATRU and a high-voltage DC load. The autotransformer rectifier ATRU is an AC / DC PE converter used to provide large DC loads. Each phase of the three-phase AC power input to the autotransformer rectifier ATRU corresponds to the A, B, and C three-phase windings in the autotransformer rectifier ATRU. The windings are usually designed on the iron core of the transformer, and voltage conversion is achieved through different numbers of turns and connection methods. The three-phase power is first transformed by a transformer and then rectified by a rectifier bridge. When using the autotransformer rectifier ATRU for voltage conversion, the input 115VAC AC power can be converted into a 540VDC output.

[0036] The secondary power subsystem B consists of a distribution panel box, a transformer rectifier TRU and a corresponding low-voltage DC load. The transformer rectifier TRU converts the input three-phase AC power into multi-phase power through a transformer, and then obtains DC voltage through a diode rectifier bridge. It has the characteristics of high reliability, small size, and unidirectional energy flow. It is widely used in the aviation field. It is mostly used in aircraft power systems to convert three-phase AC power (such as 230VAC / 115VAC) into DC power (28VDC) to power important loads on board. Both the secondary power subsystem A and the secondary power subsystem B are used to convert AC voltage into DC voltage. Usually, the first DC voltage converted by the autotransformer rectifier ATRU will be higher than the second DC voltage converted by the transformer rectifier TRU.

[0037] The secondary power subsystem C is composed of a distribution panel box, an autotransformer ATU and corresponding AC loads. The autotransformer ATU is a transformer unit used to convert the voltage value of the AC voltage. In this embodiment, the autotransformer ATU can be used to convert the main AC 115VAC to 230VAC.

[0038] In addition, if Figure 6 As shown, the power hardware-in-the-loop simulation system of the power system also includes: other accessory subsystems. The other accessory subsystems include a switch, which is used to connect the host computer subsystem, the real-time simulation subsystem and the power amplifier subsystem. The type of switch in this embodiment is a gigabit switch. The gigabit switch connects the host computer subsystem, the real-time simulation machine and all four-quadrant power amplifiers to the same network, and the host computer subsystem controls the real-time simulation machine and the power amplifiers through TCP / IP. Figure 6 Three sets of four-quadrant power amplifiers are shown.

[0039] In addition, if Figure 6As shown, other accessory subsystems also include: a conditioning box, which is used to convert the output voltage of the hardware subsystem under test into a voltage signal within a preset range, and send the voltage signal within the preset range to the real-time simulation subsystem. That is, the conditioning box collects and conditions the high voltage transformed by the secondary power supply autotransformer rectifier ATRU / transformer rectifier TRU / autotransformer ATU into a signal level voltage within the range of -16 to +16V, and the analog acquisition card in the real-time simulation machine performs voltage acquisition.

[0040] The connections between the various subsystems in the power hardware-in-the-loop simulation system of the power system are as follows: Figure 6 As shown, the real-time simulation machine of the real-time simulation subsystem outputs ordinary signals through the analog output module or performs optical fiber communication through the optical module. The three sets of four-quadrant power amplifiers in the power amplifier subsystem are all set to 130V gear and parallel three-phase mode. Through the parallel cabinet, the three sets of power amplifiers can simultaneously output the three-phase 115VAC voltage to the hardware subsystem under test.

[0041] In addition, by modifying the parameters of the power system simulation model to simulate the environment of various working conditions on the machine, the system stability and dynamic change process of the real hardware under test connected to the power system can be fully tested. The power hardware-in-the-loop simulation process of different secondary power supplies is as follows:

[0042] For example, if the power hardware-in-the-loop simulation of the autotransformer rectifier ATRU is to be performed, after all wiring and preparation work is ready, the power hardware-in-the-loop simulation model is loaded and run in the host computer system. The three-stage generator generates 115V three-phase AC power, and the voltage and current calculated by the model are sent to the four-quadrant power amplifier system1 through the interface model and optical fiber communication. At the same time, the voltage, current and other parameters of the power amplifier can also be transmitted back to the simulation model. The four-quadrant power amplifier amplifies the voltage signal and outputs it to the autotransformer rectifier ATRU distribution box to distribute power to make it work and drive the high-voltage DC load. The output voltage 540VDC and current of the autotransformer rectifier ATRU are transmitted back to the real-time simulation subsystem through the conditioning box and the analog quantity acquisition board. In the power system simulation model, its voltage and current are multiplied by the conditioning box ratio to restore and participate in the closed-loop control of the simulation model. By modifying the three-stage generator parameters and contactor status of the simulation model, the stability and dynamic change process of the autotransformer rectifier ATRU power hardware-in-the-loop simulation system are tested. It is also possible to detect the system stability by modifying the state of the real high-voltage DC load mounted on the autotransformer rectifier ATRU.

[0043] The power hardware-in-the-loop simulation of the transformer-rectifier TRU is similar to that of the autotransformer-rectifier ATRU. After all wiring and preparations are ready, the power hardware-in-the-loop simulation model is loaded and run in the host computer system. The three-stage generator generates 115V three-phase AC power, and the voltage and current calculated by the model are sent to the power amplifier system2 through the interface model and optical fiber communication. The four-quadrant power amplifier amplifies the voltage signal and outputs it to the transformer-rectifier TRU distribution box to make it work and drive important loads. The output voltage 28VDC and current of the transformer-rectifier TRU are transmitted back to the real-time simulation subsystem through the conditioning box and the analog quantity acquisition board. In the power system simulation model, its voltage and current are multiplied by the conditioning box ratio and restored to participate in the closed-loop control of the simulation model. By modifying the three-stage generator parameters and contactor status of the simulation model, the stability and dynamic change process of the transformer-rectifier TRU power hardware-in-the-loop simulation system are tested. It is also possible to detect the system stability by modifying the status of important loads mounted on the transformer rectifier TRU.

[0044] If the autotransformer (ATU) power hardware-in-the-loop simulation is to be performed, all wiring and preparation work must be completed, and then the power hardware-in-the-loop simulation model is loaded and run in the host computer system. The three-stage generator generates 115V three-phase AC power, and the voltage and current calculated by the model are sent to the power amplifier system3 through the interface model (its transformation ratio is within the voltage range that the power amplifier can receive) and the I / O interface (analog output card). The four-quadrant power amplifier amplifies the voltage signal and outputs it to the autotransformer ATU distribution box to distribute power to make it work and drive the AC load. The output voltage 230VAC and current of the autotransformer ATU are transmitted back to the real-time simulation system through the conditioning box and the analog acquisition board. In the real-time simulation model, the voltage and current are multiplied by the conditioning box transformation ratio to restore and participate in the closed-loop control of the simulation model. By modifying the three-stage generator parameters and contactor status of the simulation model, the stability and dynamic change process of the autotransformer ATU power hardware-in-the-loop simulation system can be tested. The state of the AC load mounted on the autotransformer ATU can also be modified to detect its system stability.

[0045] All modules involved in this embodiment are logic modules. In practical applications, a logic unit may be a physical unit, a part of a physical unit, or a combination of multiple physical units. In addition, in order to highlight the innovative part of the present invention, this embodiment does not introduce units that are not closely related to solving the technical problem proposed by the present invention, but this does not mean that there are no other units in this embodiment.

[0046] The embodiment of the present invention also relates to a power hardware-in-the-loop simulation method for an electric power system, which is applied to the power hardware-in-the-loop simulation system of the electric power system, such as Figure 7 As shown, the method comprises the following steps:

[0047] Step 701: Building a power system simulation model and an interface model through a host computer subsystem;

[0048] Step 702: Control the real-time simulation subsystem and the power amplification subsystem according to different test configuration parameters;

[0049] Step 703: Record test results of multiple different secondary power subsystems under different test configuration parameters.

[0050] Compared with the prior art, this embodiment modifies the parameters of the power system simulation model to simulate the environment of various working conditions on the aircraft, and fully tests the system stability and dynamic change process of the real hardware under test connected to the aviation power system. The simulation of the real on-board environment for testing and the formation of a test report greatly shorten the development cycle of the aviation power system and save costs.

[0051] In addition, before building the power system simulation model and interface model through the host computer subsystem, it also includes: building a full digital simulation model based on the hardware information in the hardware subsystem under test; after the test results of the full digital simulation model are passed, building the power system simulation model and interface model based on the full digital simulation model.

[0052] The full digital simulation model uses MATLAB / Simulink to design and develop the power model. Figure 8 As shown in the figure, it includes generator G (a 115V constant frequency AC generator, a 115V auxiliary AC generator), a 540V high voltage DC auto-transformer rectifier ATRU, a 230VAC auto-transformer ATU, a 28V transformer rectifier TRU, distribution devices (switches / circuit breakers, contactors, intelligent contactors, solid-state power controllers, etc.), loads and batteries, etc. Then, according to the power system topology diagram and control requirements, the simulation model is built and debugged based on MATLAB / Simulink. The power system simulation model is a mathematical model used to simulate the working principle and performance of each component of the power system. The simulation model can be constructed based on physical principles, empirical data and experimental results for system-level simulation and analysis. The simulation model can also be integrated and combined according to the power system topology to build a comprehensive power system simulation model system. The simulation model is used for system design, optimization and performance evaluation.

[0053] After building a fully digital simulation model in MATLAB / Simulink, simulation debugging is required. Fig. 9 As shown, the full-digital simulation model is compiled and loaded into the real-time simulation machine through the real-time simulation management software for real-time simulation and debugging of relevant parameters, highly simulating the real situation on the machine, and simulating the power distribution process on the machine in different working modes. The upper and lower computers are connected through TCP / IP connection. The upper computer can control the full-digital simulation model running in the real-time simulation machine in real time, and can also monitor the dynamic changes of the full-digital simulation model under various working conditions in real time and efficiently, and display and analyze the voltage, current, contactor status, etc. in real time to verify the stability and accuracy of the full-digital real-time simulation system. It lays a foundation for power hardware-in-the-loop simulation testing.

[0054] After there are no obvious problems in the full digital simulation, modify the full digital simulation model based on the existing aviation power system components (such as auto transformer rectifier (ATRU), transformer rectifier (TRU), auto transformer (ATU), etc.), shield the simulation model part of the existing components in the system model, and conduct power hardware in the loop simulation test through external equipment connection. Verify the system performance and stability after connecting to the actual test parts to find potential problems and optimization space. The dynamic response characteristics of the entire power hardware in the loop test simulation system and the dynamic change process of the system can be monitored on the host computer.

[0055] The power hardware in the loop simulation test method in the embodiment is specifically described as follows:

[0056] a) Build a real-time simulation model:

[0057] 1. Based on relevant parameters, use MATLAB / Simulink to build a high-quality aircraft power system integration simulation model.

[0058] 2. Perform simulink offline simulation, run and debug the simulation model to ensure the stability of the simulation model and reflect the dynamic changes of the system.

[0059] 3. Build and debug the interface model, fiber optic communication and I / O of power hardware in the loop to lay a solid foundation for power hardware in the loop.

[0060] b) Determine whether the full digital simulation result passes, if so, proceed to step c), if not, return to step a).

[0061] Use simulation management software on the simulation development host to perform real-time simulation, and debug the simulation model again during the real-time process so that it can fully reflect the characteristics of the power system.

[0062] c) Establish wiring, connection and integration between subsystems.

[0063] 1. Reset the full digital real-time simulation and integrate all components of the entire system according to the system architecture diagram.

[0064] 2. According to the relevant wiring requirements, connect the power cords of each device, power cables, communication cables in the amplifier, optical fiber cables, BNC cables, network cables, DB37 adapter boards, tested hardware and related cables of the conditioning box, etc.

[0065] 3. After all wiring is completed and detailed inspection and confirmation is carried out, close all distribution cabinet circuit breakers and make preparations before the test.

[0066] 4. Turn on all devices in this system and prepare for power hardware-in-the-loop simulation testing.

[0067] d) Control the power amplifier.

[0068] Through the four-quadrant power amplifier control software, the gears of the three power amplifiers are all set to: 135V gear, parallel mode: three-phase AC mode.

[0069] e) Run the real-time simulation model.

[0070] 1. Load and run the power hardware-in-the-loop simulation model in the simulation management software.

[0071] 2. When you see 115VAC voltage and other information on the three power amplifiers, open the amplifier control software to enable the power amplifiers to output their 115VAC voltage.

[0072] 3. The ATRU, TRU, and ATU are observed to work, and the relevant voltage and current parameters are transmitted back to the real-time simulation model through the conditioning box and analog acquisition board for closed-loop control.

[0073] f) Determine whether the power hardware in-loop test has passed, if so, proceed to step g), if not, return to the previous step e), modify the parameters and re-run the simulation model.

[0074] 1. According to the power hardware in-the-loop test outline, modify the test parameters in real time and monitor the dynamic changes of the entire system.

[0075] 2. Modify the relevant parameters of the aircraft power system, build different onboard environments, and conduct power hardware-in-the-loop simulation tests on ATRU, TRU, and ATU.

[0076] g) Record the test results and the test is completed.

[0077] 1. Record the test results under different onboard environments.

[0078] 2. After the test is finished, press the power amplifier output button to stop it from outputting. Then shut down all the devices in the system to complete the aviation power system power hardware-in-the-loop simulation test.

[0079] In addition, the power hardware-in-the-loop simulation test method in this embodiment is implemented by the power hardware-in-the-loop simulation test system in the above embodiment, that is, the implementation method mentioned in the above system embodiment is also applicable to the method implementation of this embodiment. To avoid repetition, it will not be repeated here.

[0080] The power system mentioned in the embodiment of the present invention can be a power system in the context of aerospace. In view of the background of power hardware-in-the-loop simulation of aviation power systems, in order to adapt to the development needs of modern aircraft power systems and meet the requirements of power distribution, system control, system safety protection and energy efficiency management of new generation aircraft power systems, real-time digital simulation and power hardware-in-the-loop simulation are performed on aviation power systems. It provides strong support for the design and verification of power systems, ensures the quality and progress of aircraft power system development, and improves the system design level and engineering practice efficiency. The embodiment of the present invention can be applied to the power hardware-in-the-loop simulation test platform of aviation power systems to verify the performance and stability of aviation power systems, thereby discovering potential problems and reducing development costs and risks. Through the power hardware-in-the-loop simulation test system composed of a high-precision full-digital simulation model of the aviation power system and real components under test, the performance and stability of the system under different working conditions can be verified, which helps to discover the mutual influence between system designs or components.

[0081] The step division of the above methods is only for the purpose of clear description. When implemented, they can be combined into one step or some steps can be split and decomposed into multiple steps. As long as they include the same logical relationship, they are all within the scope of protection of this patent; adding insignificant modifications to the algorithm or process or introducing insignificant designs without changing the core design of the algorithm and process are all within the scope of protection of this patent.

[0082] Those skilled in the art will appreciate that the above embodiments are specific embodiments for implementing the present invention, and that in actual applications, various changes may be made in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A power hardware-in-the-loop simulation system for an electric power system, characterized in that: include: The host computer subsystem is used to build the power system simulation model and interface model, send the simulation test code to the real-time simulation subsystem, control the power amplifier subsystem, and generate simulation test results based on the status of the power hardware-in-the-loop simulation system during the simulation test; A real-time simulation subsystem, used to simulate the operation scenarios of the power system simulation model and the interface model; A power amplification subsystem, used for signal conversion and transmission between the real-time simulation system and the hardware subsystem under test; The hardware subsystem under test is composed of a plurality of different secondary power subsystems, each of which includes: a distribution panel box, a secondary power supply and a load, and the secondary power supply in different secondary power subsystems is of different types.

2. The power hardware-in-the-loop simulation system for the power system according to claim 1, characterized in that: The host computer subsystem is composed of real-time simulation management software and power amplifier control software; The real-time simulation management software is used to configure and send simulation test codes to the real-time simulation subsystem; The power amplifier control software is used to remotely control the configuration parameter settings of the power amplifier in the power amplifier subsystem.

3. The power hardware-in-the-loop simulation system for the power system according to claim 1, characterized in that: The power amplifier subsystem is composed of a plurality of four-quadrant power amplifiers and parallel cabinets; The four-quadrant power amplifier is used to convert the voltage signal sent by the real-time simulation subsystem into a real voltage and transmit it to the hardware subsystem under test, and / or to convert the received real current into a current signal and return it to the real-time simulation subsystem; The parallel cabinet is used to adjust the parallel mode of the multiple four-quadrant power amplifiers to change the output voltage.

4. The power hardware-in-the-loop simulation system for the power system according to claim 1, characterized in that: The secondary power supply includes: an autotransformer rectifier ATRU, a transformer rectifier TRU, and / or an autotransformer ATU; The autotransformer rectifier ATRU is used to convert the AC voltage into a first DC voltage; The transformer rectifier TRU is used to convert the AC voltage into a second DC voltage; wherein the first DC voltage is higher than the second DC voltage; The autotransformer ATU is used to convert the voltage value of the AC voltage.

5. The power hardware-in-the-loop simulation system for the power system according to claim 4, characterized in that: The first DC voltage is 540VDC; the second DC voltage is 28VDC; the autotransformer ATU is used to convert 115VAC into 230VAC.

6. The power hardware-in-the-loop simulation system for the power system according to any one of claims 1 to 5, characterized in that: Also includes: The switch is used to connect the host computer subsystem, the real-time simulation subsystem and the power amplification subsystem.

7. The power hardware-in-the-loop simulation system for an electric power system according to any one of claims 1 to 5, characterized in that: Also includes: The conditioning box is used to convert the output voltage of the hardware subsystem under test into a voltage signal within a preset range, and send the voltage signal within the preset range to the real-time simulation subsystem.

8. The power hardware-in-the-loop simulation system for the power system according to claim 7, characterized in that: The preset range is -16V to 16V.

9. A power hardware-in-the-loop simulation method for an electric power system, characterized in that: A power hardware-in-the-loop simulation system for an electric power system according to any one of claims 1 to 8, the method comprising: Build power system simulation model and interface model through the host computer subsystem; Control the real-time simulation subsystem and the power amplifier subsystem according to different test configuration parameters; Record test results of multiple different secondary power subsystems under different test configuration parameters.

10. The power hardware-in-the-loop simulation method for an electric power system according to claim 9, characterized in that: Before building the power system simulation model and interface model through the host computer subsystem, it also includes: Construct a fully digital simulation model based on the hardware information in the hardware subsystem under test; After the test result of the full-digital simulation model is passed, the power system simulation model and the interface model are built based on the full-digital simulation model.

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