A three-stage starter / generator simulation method, device and storage medium

Abstract

The present specification discloses a simulation method, device and storage medium for a three-stage starter / generator. The method includes: receiving a simulation instruction for a three-stage starter / generator; constructing an exciter flux state variable electromagnetic model based on the constraint relationship between flux, excitation winding current, excitation winding self-inductance and excitation winding mutual inductance according to the simulation instruction; constructing a main exciter voltage model based on the flux generated by each winding of the exciter stator in the main exciter when a forward current passes through the exciter stator, the voltage of the main exciter and the constraint relationship between the current of the main exciter according to the exciter flux state variable electromagnetic model; determining a generator voltage model corresponding to the generator in the driving state of the current output by the main exciter according to the main exciter voltage model and the generator flux state variable electromagnetic model; determining a simulation model of the three-stage starter / generator and simulating it according to the main exciter voltage model and the generator voltage model.

Description

Technical Field

[0001] The present specification relates to the field of computer technology, and in particular to a simulation method, device and storage medium for a three-stage starter / generator. Background Art

[0002] The three-stage starter / generator is usually composed of an auxiliary exciter, a main exciter and a generator. It is an efficient and reliable electrical device that combines the functions of a starter and a generator. It can not only reduce the weight of the aircraft, but also improve the stability of operation.

[0003] In order to fully guarantee the normal operation of the three-stage starter / generator, it is usually necessary to simulate it before operation. However, due to the complexity and particularity of the three-stage starter / generator, traditional simulation methods are often difficult to accurately simulate its operation process, resulting in a large difference between the simulation results and the actual operation conditions.

[0004] Therefore, how to make the simulation results of the step-type generator closer to its actual operation and improve the accuracy of the simulation is an urgent problem to be solved. Summary of the invention

[0005] This specification provides a three-stage starter / generator simulation method, device and storage medium to partially solve the above-mentioned problems existing in the prior art.

[0006] This manual adopts the following technical solutions:

[0007] This specification provides a simulation method for a three-stage starter / generator, including:

[0008] Receive simulation instructions for a three-stage starter / generator;

[0009] According to the simulation instruction, based on the constraint relationship between the flux linkage of the exciter, the excitation winding current, the self-inductance of the excitation winding and the mutual inductance of the excitation winding, the electromagnetic model of the flux linkage state variable of the exciter is constructed; and based on the constraint relationship between the flux linkage of the generator exciter, the excitation winding current, the self-inductance of the excitation winding and the mutual inductance of the excitation winding, the electromagnetic model of the flux linkage state variable of the generator is constructed;

[0010] According to the exciter flux state variable electromagnetic model, a main exciter voltage model is constructed based on the constraint relationship between the flux generated when each winding of the exciter stator in the main exciter passes through a forward current, the voltage of the main exciter, and the current of the main exciter;

[0011] Determine, according to the main exciter voltage model and the generator flux state variable electromagnetic model, a generator voltage model corresponding to the generator under the driving state of the current output by the main exciter;

[0012] According to the main exciter voltage model and the generator voltage model, a simulation model of a three-stage starter / generator is determined and simulated.

[0013] Optionally, based on the constraint relationship between the flux linkage of the exciter, the excitation winding current, the self-inductance of the excitation winding, and the mutual inductance of the excitation winding, an electromagnetic model of the flux linkage state variable of the exciter is constructed, specifically including:

[0014] According to the constraint relationship between the magnetic flux, magnetic flux and coil turns of the excitation winding of the excitation machine, the first electromagnetic model of the excitation machine is constructed; according to the constraint relationship between the magnetic flux of the excitation winding of the excitation machine in the direct axis component, the self-inductance of the excitation winding in the direct axis component and the current of the three-phase winding of the stator of the excitation machine in the direct axis component, the second electromagnetic model of the excitation machine is constructed; according to the constraint relationship between the magnetic flux of the excitation winding of the excitation machine in the quadrature axis component, the self-inductance of the excitation winding in the quadrature axis component and the current of the three-phase winding of the stator of the excitation machine in the quadrature axis component, the third electromagnetic model of the excitation machine is constructed;

[0015] The exciter flux state variable electromagnetic model is determined according to the first exciter electromagnetic model, the second exciter electromagnetic model and the third exciter electromagnetic model.

[0016] Optionally, based on the constraint relationship between the flux linkage of the generator exciter, the excitation winding current, the excitation winding self-inductance, and the excitation winding mutual inductance, a generator flux linkage state variable electromagnetic model is constructed, specifically including:

[0017] A first generator electromagnetic model is constructed based on the constraint relationship between the flux linkage of the generator excitation winding, the self-inductance of the excitation winding, and the excitation winding current; a second generator electromagnetic model is constructed based on the flux linkage of the generator excitation winding in the direct axis component, the mutual inductance between the excitation winding and the direct axis component of the excitation winding, and the constraint relationship between the excitation winding current; a third generator electromagnetic model is constructed based on the quadrature axis component of the flux linkage of the generator excitation winding, the mutual inductance between the excitation winding and the quadrature axis component of the excitation winding, and the constraint relationship between the excitation winding current;

[0018] The generator flux state variable electromagnetic model is determined according to the first generator electromagnetic model, the second generator electromagnetic model and the third generator electromagnetic model.

[0019] Optionally, according to the flux state variable electromagnetic model, based on the constraint relationship between the flux generated when each winding of the stator in the main exciter passes through a forward current, the voltage of the main exciter, and the current of the main exciter, a main exciter voltage model is constructed, specifically including:

[0020] According to the exciter flux state variable electromagnetic model, based on the voltage of the direct axis of the exciter stator three-phase winding, the current of the direct axis of the exciter stator three-phase winding, the resistance of each item of the exciter stator three-phase winding and the constraint relationship between the direct axis flux, a voltage model of the direct axis of the exciter stator three-phase winding is constructed; According to the exciter flux state variable electromagnetic model, based on the voltage of the quadrature axis of the exciter stator three-phase winding, the current of the quadrature axis of the exciter stator three-phase winding, the resistance of each item of the exciter stator three-phase winding and the constraint relationship between the quadrature axis flux, a voltage model of the quadrature axis of the exciter stator three-phase winding is constructed; According to the exciter flux state variable electromagnetic model, based on the constraint relationship between the voltage of the exciter rotor exciter winding, the flux of the exciter winding, the current of the exciter winding and the resistance of the exciter winding, a voltage model of the exciter winding is constructed;

[0021] The main exciter voltage model is determined according to the voltage model of the direct axis of the three-phase stator winding of the exciter, the voltage model of the quadrature axis of the three-phase stator winding of the exciter and the voltage model of the excitation winding.

[0022] Optionally, determining a simulation model of a three-stage starter / generator according to the main exciter voltage model and the generator voltage model specifically includes:

[0023] According to the main exciter voltage model and the generator voltage model, a simulation model of the three-stage starter / generator under the starting condition is determined, wherein, under the starting condition, the quadrature-axis current of the main exciter is equal to the direct current output by the rectifier, and the main generator excitation winding current is equal to the quadrature-axis current of the auxiliary exciter.

[0024] Optionally, according to the main exciter voltage model and the generator voltage model, determining a simulation model of a three-stage starter / generator and performing simulation, specifically includes:

[0025] Determining a simulation model of a three-stage starter / generator according to the main exciter voltage model and the generator voltage model;

[0026] The simulation model of the three-stage starter / generator is processed to determine the simulation model of the three-stage starter / generator without considering the quadrature-axis flux linkage and the quadrature-axis mutual inductance of the excitation winding as a simplified model, and simulation is performed using the simplified model.

[0027] Optionally, the method further comprises:

[0028] The simulation model of the three-stage starter / generator is controlled during the simulation process by a preset controller.

[0029] Optionally, the simulation model of the three-stage starter / generator is controlled during the simulation process by a preset controller, specifically including:

[0030] The controller is used to control the excitation mode of the exciter in the simulation model of the three-stage starter / generator according to the rotational speed of the motor, and the controller is used to regulate the relative position of the voltage vector and the main generator rotor during the starting process of the generator.

[0031] This manual provides a three-stage starter / generator simulation device, including:

[0032] A receiving module, used for receiving a simulation instruction for a three-stage starter / generator;

[0033] The first construction module is used to construct a flux state variable electromagnetic model according to the simulation instruction based on the constraint relationship between the flux, the excitation winding current, the excitation winding self-inductance and the excitation winding mutual inductance;

[0034] A second construction module is used to construct a main exciter voltage model according to the flux state variable electromagnetic model, based on the constraint relationship between the flux generated when each winding of the exciter stator in the main exciter passes through a forward current, the voltage of the main exciter, and the current of the main exciter;

[0035] A third construction module is used to determine a generator voltage model corresponding to the generator under the driving state of the current output by the main exciter according to the main exciter voltage model and the flux state variable electromagnetic model;

[0036] The simulation module is used to determine the simulation model of the three-stage starter / generator and perform simulation according to the main exciter voltage model and the generator voltage model.

[0037] This specification provides a computer-readable storage medium, wherein the storage medium stores a computer program, and when the computer program is executed by a processor, the above-mentioned three-stage starter / generator simulation method is implemented.

[0038] This specification provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the above-mentioned three-stage starter / generator simulation method when executing the program.

[0039] At least one of the above technical solutions adopted in this specification can achieve the following beneficial effects:

[0040] In the simulation method of the three-stage starter / generator provided in the present specification, a simulation instruction for the three-stage starter / generator is received; according to the simulation instruction, a flux state variable electromagnetic model is constructed based on the constraint relationship between the flux, the excitation winding current, the excitation winding self-inductance and the excitation winding mutual inductance; according to the flux state variable electromagnetic model, a main exciter voltage model is constructed based on the constraint relationship between the flux generated when each winding of the exciter stator in the main exciter passes through a forward current, the voltage of the main exciter and the current of the main exciter; according to the main exciter voltage model and the flux state variable electromagnetic model, a generator voltage model corresponding to the generator under the driving state of the current output by the main exciter is determined; according to the main exciter voltage model and the generator voltage model, a simulation model of the three-stage starter / generator is determined and simulated.

[0041] It can be seen from the above method that this scheme can construct a flux state variable electromagnetic model based on the constraint relationship between flux, excitation winding current, excitation winding self-inductance and excitation winding mutual inductance, and further construct the voltage model of the exciter and the voltage model of the generator on the basis of the electromagnetic model, accurately restore the input-output relationship between the exciter and the generator and the constraint relationship between various physical quantities, and the three-stage starter / generator simulation model constructed by this scheme effectively improves the accuracy of the simulation results. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The drawings described herein are used to provide a further understanding of this specification and constitute a part of this specification. The illustrative embodiments and descriptions of this specification are used to explain this specification and do not constitute an improper limitation on this specification. In the drawings:

[0043] Figure 1 A schematic flow chart of a three-stage starter / generator simulation method provided in this specification;

[0044] Figure 2 This is a schematic diagram of the structure of a three-stage starter / generator provided in this specification;

[0045] Figure 3 A single-phase H-bridge PWM inverter circuit diagram provided in this specification;

[0046] Figure 4 A main exciter control diagram of a three-stage starter / generator system during the starting process provided in this specification;

[0047] Figure 5 A schematic diagram of a three-stage starter / generator simulation device provided in this specification;

[0048] Figure 6 A method corresponding to the Figure 1Schematic diagram of electronic equipment. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical solutions and advantages of this specification more clear, the technical solutions of this specification will be clearly and completely described below in combination with the specific embodiments of this specification and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of this specification, not all of them. Based on the embodiments in this specification, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this specification.

[0050] The technical solutions provided by the embodiments of this specification are described in detail below in conjunction with the accompanying drawings.

[0051] Figure 1 A schematic flow chart of a three-stage starter / generator simulation method provided in this specification includes the following steps:

[0052] S101: receiving a simulation instruction for a three-stage starter / generator;

[0053] S102: According to the simulation instructions, based on the constraint relationship between the exciter's flux linkage, the excitation winding current, the excitation winding self-inductance and the excitation winding mutual inductance, an exciter flux linkage state variable electromagnetic model is constructed; and based on the constraint relationship between the exciter's flux linkage, the excitation winding current, the excitation winding self-inductance and the excitation winding mutual inductance, a generator flux linkage state variable electromagnetic model is constructed.

[0054] The simulation of a three-stage starter / generator is important in several ways, including:

[0055] By simulating the actual operating conditions of the three-stage starter / generator, it is possible to check whether the design meets performance indicators such as starting speed, power generation efficiency, voltage stability, etc., thereby avoiding problems during actual manufacturing and use.

[0056] Compared with traditional R&D methods, simulation technology can significantly reduce R&D costs. Through computer simulation, the large amount of money and time required to manufacture physical prototypes can be avoided, while reducing the risks and uncertainties in the test process.

[0057] In addition, simulation technology can also provide support for troubleshooting and maintenance. By simulating the process and phenomenon of a fault, maintenance personnel can better understand the cause and location of the fault, so as to quickly and accurately locate the problem and repair it.

[0058] In summary, the simulation of the three-stage starter / generator is of great significance in verifying the rationality of the design, optimizing system performance, reducing R&D costs, improving system reliability, and facilitating troubleshooting and maintenance. With the continuous development and improvement of simulation technology, its application in aviation, aerospace and other fields will become more and more extensive.

[0059] Based on this, this specification provides a simulation method for a three-stage starter / generator to accurately simulate the operation of the three-stage starter / generator.

[0060] In this specification, the execution entity for implementing a simulation method for a three-stage starter / generator can be a simulation client installed on a terminal device such as a laptop computer, a desktop computer, etc., and of course, it can also be a server. For the sake of ease of description, the following will only take the client as an example of the execution entity to illustrate a simulation method for a three-stage starter / generator provided in this specification.

[0061] For ease of understanding, this specification provides a schematic diagram of the structure of a three-stage starter / generator, such as Figure 2 shown.

[0062] Figure 2 This is a schematic diagram of the structure of a three-stage starter / generator provided in this manual.

[0063] Among them, the three-stage starter / generator, based on the traditional three-stage brushless power generation system, does not change the original structure of the motor. It uses the DC excitation winding in the main exciter to establish an alternating magnetic field by passing single-phase AC power during starting, ensuring that the main exciter can provide sufficient excitation current to the main generator when it is stationary, driving the main generator to operate as a motor, thereby starting the engine. As the speed increases, it switches to DC excitation, allowing the three-stage starting system to enter the power generation state.

[0064] Among them, the three-stage starter / generator consists of a main exciter, an auxiliary exciter, and a generator. In the main exciter, the rotor excitation magnetomotive force and the three-phase winding armature reaction magnetomotive force rotate at a synchronous speed and remain relatively stationary. The armature magnetomotive force and the excitation magnetomotive force synthesize the main magnetic field in space. The deviation between the armature magnetomotive force and the spatial phase of the main magnetic field determines whether the armature reaction is magnetization, demagnetization or cross magnetization.

[0065] According to the double reaction theory, the phase current and phase voltage of the main exciter can be decomposed into the direct-axis and quadrature-axis directions to obtain the motor back-EMF equation. Then, combined with the working principle of the exciter, the excitation winding flux, the excitation winding self-inductance, the mutual inductance between the excitation winding and the direct-axis winding, the direct-axis flux self-inductance, and the quadrature-axis flux self-inductance can be obtained. The above-mentioned excitation winding can include the generator excitation winding and the exciter excitation winding.

[0066] In the three-stage generator / starter system, the main generator generally adopts an electrically excited synchronous motor with a damping strip. The damping strip plays an additional magnetic field during the system transient process. In the voltage regulation process, as a secondary factor, it can generally be ignored. When the damping winding is ignored, the client can first construct a flux state variable electromagnetic model in the dqo coordinate system based on the constraint relationship between the flux, the excitation winding current, the excitation winding self-inductance, and the excitation winding mutual inductance.

[0067] Among them, the client can construct an electromagnetic model of the exciter flux state variable based on the constraint relationship between the exciter flux, excitation winding current, excitation winding self-inductance and excitation winding mutual inductance.

[0068] Specifically, the client can construct a first exciter electromagnetic model according to the constraint relationship between the exciter field winding flux, magnetic flux and the number of coil turns. The first exciter electromagnetic model can be expressed as:

[0069]

[0070] in, is the magnetic flux of the excitation winding of the exciter, and N is the number of coil turns of the excitation winding of the exciter.

[0071] According to the constraint relationship between the flux linkage of the excitation winding in the direct axis component, the self-inductance of the excitation winding in the direct axis component, and the current of the three-phase winding of the excitation stator in the direct axis component, the second excitation machine electromagnetic model is constructed. The second excitation machine electromagnetic model can be expressed as:

[0072]

[0073] in, is the flux linkage of the exciter direct axis, is the current of the direct axis of the three-phase stator winding of the exciter, is the self-inductance of the direct-axis excitation winding of the exciter, The flux linkage of the field winding.

[0074] According to the constraint relationship between the flux linkage of the excitation winding in the quadrature axis component, the self-inductance of the excitation winding in the quadrature axis component, and the current of the three-phase winding of the stator of the excitation machine in the quadrature axis component, the electromagnetic model of the third excitation machine is constructed. The electromagnetic model of the third excitation machine can be expressed as:

[0075]

[0076] in, is the flux linkage of the exciter's quadrature axis, is the current of the quadrature axis of the three-phase winding of the exciter stator, It is the self-inductance of the quadrature-axis field winding of the exciter.

[0077] Afterwards, the client can determine the electromagnetic model of the exciter flux state variable according to the first exciter electromagnetic model, the second exciter electromagnetic model and the third exciter electromagnetic model.

[0078] At the same time, the client can construct a generator flux state variable electromagnetic model based on the constraint relationship between the generator exciter's flux, excitation winding current, excitation winding self-inductance, and excitation winding mutual inductance.

[0079] Specifically, the client can construct a first generator electromagnetic model according to the constraint relationship between the magnetic flux of the generator excitation winding, the self-inductance of the excitation winding, and the excitation winding current. The first generator electromagnetic model can be expressed as:

[0080]

[0081] in, , , They are the flux linkage of the main generator excitation winding, the self-inductance of the generator excitation winding and the current of the generator excitation winding.

[0082] According to the magnetic flux of the generator excitation winding in the direct axis component, the mutual inductance between the excitation winding and the direct axis component of the excitation winding, and the constraint relationship between the excitation winding current, the second generator electromagnetic model is constructed. The second generator electromagnetic model can be expressed as:

[0083]

[0084] in, is the flux linkage of the main generator excitation winding in the direct axis component, is the mutual inductance between the field winding and the direct-axis winding.

[0085] According to the flux linkage of the generator excitation winding in the quadrature axis component, the mutual inductance between the excitation winding and the quadrature axis component of the excitation winding, and the constraint relationship between the excitation winding current, a third generator electromagnetic model is constructed. The third generator electromagnetic model can be expressed as:

[0086]

[0087] in, is the flux linkage of the main generator excitation winding on the quadrature axis component, is the mutual inductance between the field winding and the quadrature-axis winding.

[0088] The client may then determine the flux state variable electromagnetic model based on the first generator electromagnetic model, the second generator electromagnetic model and the third generator electromagnetic model.

[0089] S103: According to the exciter flux state variable electromagnetic model, based on the constraint relationship between the flux generated when each winding of the exciter stator in the main exciter passes through a forward current, the voltage of the main exciter, and the current of the main exciter, a main exciter voltage model is constructed.

[0090] According to the double reaction theory and the working principle of the main exciter, the client can obtain the excitation winding flux, the excitation winding flux self-inductance, the mutual inductance between the excitation winding and the direct-axis winding, the direct-axis flux and the direct-axis self-inductance, the quadrature-axis flux and the quadrature-axis self-inductance. Then, according to the flux state variable electromagnetic model, based on the negative flux generated when the stator windings of the main exciter pass through the positive current, the positive flux generated when the excitation winding passes through the positive current, and the voltage and current of the main exciter, the voltage model of the three-phase stator winding and the rotor excitation winding of the main exciter is obtained.

[0091] Specifically, the client can construct a voltage model of the direct axis of the three-phase stator winding of the exciter according to the second exciter electromagnetic model, based on the voltage of the direct axis of the three-phase stator winding of the exciter, the current of the direct axis of the three-phase stator winding of the exciter, the resistance of each item of the three-phase stator winding of the exciter, and the constraint relationship between the magnetic flux of the direct axis. The voltage model of the direct axis of the three-phase winding can be expressed as:

[0092]

[0093] in, is the voltage of the direct axis of the three-phase stator winding of the exciter, is the current of the direct axis of the three-phase stator winding of the exciter, Ra is the resistance of each phase of the three-phase stator winding, is the magnetic flux of the direct axis (negative magnetic flux).

[0094] According to the electromagnetic model of the third exciter, based on the voltage of the quadrature axis of the three-phase stator winding of the exciter, the current of the quadrature axis of the three-phase stator winding of the exciter, the resistance of each item of the three-phase stator winding of the exciter, and the constraint relationship between the flux linkage of the quadrature axis, the voltage model of the quadrature axis of the three-phase stator winding of the exciter is constructed. The voltage model of the quadrature axis of the three-phase winding can be expressed as:

[0095]

[0096] in, is the voltage of the three-phase quadrature axis of the exciter stator, is the current of the quadrature axis of the three-phase stator winding of the exciter, Ra is the resistance of each phase of the three-phase stator winding, The flux linkage of the quadrature axis (positive flux linkage).

[0097] According to the first exciter electromagnetic model, based on the constraint relationship between the voltage of the excitation winding of the excitation machine rotor, the flux linkage of the excitation winding, the current of the excitation winding and the resistance of the excitation winding, the voltage model of the excitation winding is constructed. The voltage model of the excitation winding can be expressed as:

[0098]

[0099] in, is the voltage of the exciter field winding, is the flux linkage of the excitation winding of the exciter (positive flux linkage), is the current of the excitation winding of the exciter, R f is the excitation winding resistance of the exciter.

[0100] Afterwards, the client determines the voltage model of the main exciter based on the voltage model of the direct axis of the three-phase stator winding of the exciter, the voltage model of the quadrature axis of the three-phase stator winding of the exciter, the voltage model of the excitation winding, and the electromagnetic model of the exciter flux state variable.

[0101] Based on the above exciter stator three-phase winding and rotor excitation winding voltage model and the simplified flux state variable electromagnetic model, the main exciter model is obtained by analysis and processing. In the process of generator power transmission, the quadrature axis component plays a major role. Therefore, the influence of the direct axis component will be ignored in the process of simplifying the model. Among them, the simplified flux state variable electromagnetic model is a flux state variable electromagnetic model that ignores the direct axis component.

[0102] S104: Determine, according to the main exciter voltage model and the generator flux state variable electromagnetic model, a generator voltage model corresponding to the generator in a driving state of the current output by the main exciter.

[0103] In practical applications, the three-phase power output by the three-phase winding of the main exciter is rectified into direct current by a rotating rectifier, and the direct current is input into the excitation winding end of the main generator. The three-phase winding of the main generator cuts the excitation magnetic field generated on the excitation winding rotating with the shaft to generate three-phase power, which is then rectified into direct current by a rectifier. The whole process is relatively independent and not affected by other links, and the current in the process is uncontrolled, so the main exciter and the main generator are analyzed as a whole in the modeling.

[0104] The client adds the main generator item to the main exciter voltage model. Thus, the generator voltage model under the driving state of the current output by the main exciter is obtained. The generator voltage model can be expressed as:

[0105]

[0106] in, Main generator voltage, is the main generator excitation winding resistance, is the direct axis flux of the main generator, is the cross-axis flux linkage of the main generator, is the angular velocity, is the direct-axis current of the main generator, The quadrature axis current of the main generator.

[0107] S105: Determine a simulation model of a three-stage starter / generator according to the main exciter voltage model and the generator voltage model and perform simulation.

[0108] After determining the main exciter voltage model and the generator voltage model, the client can further determine the simulation model of the three-stage starter / generator based on the main exciter voltage model and the generator voltage model.

[0109] The simulation model of the three-stage starter / generator may be a simulation model of the three-stage starter / generator under the starting condition. Under the starting condition, the quadrature axis current of the main exciter is equal to the DC current output by the rectifier, and the excitation winding current of the main generator is equal to the quadrature axis current of the auxiliary exciter. The simulation model of the three-stage starter / generator under the starting condition may be expressed as:

[0110]

[0111] in, , It is a three-stage aviation brushless synchronous generator system with a bus-terminated resistive load. is the voltage across the resistive load, is the angular velocity of the exciter, and s is the characteristic parameter matrix of the reflected signal / transmitted signal in the response frequency domain.

[0112] Furthermore, during the simulation process, the client can control the simulation model of the three-stage starter / generator through a preset controller.

[0113] Among them, the client can control the excitation mode of the exciter in the simulation model of the three-stage starter / generator through the controller according to the speed of the motor, and, through the controller, adjust the relative position of the voltage vector and the main generator rotor during the starting process of the generator.

[0114] Specifically, when the motor speed increases to a certain speed value, a DC excitation method can be used to stabilize the output voltage at a required voltage value through bus voltage feedback regulation.

[0115] In the process of controlling the excitation mode of the exciter in the simulation model of the three-stage starter / generator, in order to meet the requirements of single-phase AC modulation and DC modulation at the same time, the power main circuit of the main exciter adopts an H-bridge inverter circuit. For ease of understanding, this manual provides a single-phase H-bridge PWM inverter circuit diagram, such as Figure 3 shown.

[0116] Figure 3 This is a single-phase H-bridge PWM inverter circuit diagram provided in this specification.

[0117] Among them, the output end of the three-stage starter / generator , It is connected to the excitation winding end of the main exciter, and the input end is directly connected to the DC270V DC bus of the aviation power system.

[0118] Furthermore, this specification also provides a main exciter control diagram of a three-stage starter / generator system during the starting process, such as Figure 4 shown.

[0119] Figure 4 This is a main exciter control diagram of a three-stage starter / generator system during the starting process provided in this manual.

[0120] in, In order to control the modulation degree of the AC excitation component calculated by the system according to the motor speed, in the initial stage of starting, the modulation degree of the AC excitation component is given at the maximum value and continues until the excitation switching speed, and then decreases linearly with the speed until it is completely switched to the DC component.

[0121] In practical applications, the main exciter excitation control method shown in Figure 4 will be in three different working modes:

[0122] When the motor is at rest and low speed, , At this time, the main exciter is in single-phase AC excitation mode, and the controller outputs the highest AC modulation voltage.

[0123] When the motor speed exceeds a certain level, the amount of AC excitation powder is adjusted At the beginning, the speed decreases linearly at a certain slope. Starts to increase linearly, the actual output The excitation current of the exciter enters a real-time adjustment state. At this time, the main exciter is in the transition stage between the single-phase AC excitation mode and the DC excitation mode. At this time, the excitation winding section of the exciter has both AC and DC components.

[0124] when After it is reduced to 0, the controller will no longer output the AC component, and the exciter will adopt a constant current closed-loop regulation method according to the rated excitation current to achieve DC excitation regulation of the exciter.

[0125] In the process of controlling the generator, when the main generator is in the electric state, it is essentially an electrically excited synchronous motor. The power main circuit is used to control the start of the main generator, and the SVPWM modulation method is used to drive the main generator to output electromagnetic torque to drive the shaft to rotate. The main power circuit of the main generator adopts voltage torque closed-loop control (VTCC) to adjust the main generator δ angle to allow the main generator to output a better large torque.

[0126] Among them, the control rules for the generator mainly include:

[0127] 1. The δ-angle control loop will change the relative position of the voltage vector and the main generator rotor. In order to obtain better load-carrying capacity of the motor under the same armature current, the direct-axis armature current of the main generator needs to be adjusted in time, which places high demands on the real-time performance of the system. Therefore, the δ-angle control loop needs to set smaller adjustment parameters to ensure a smaller single adjustment amount. At the same time, a faster adjustment frequency is also required.

[0128] Second, there is no control requirement such as sudden speed change during the starting process, so the control frequency of the V control loop does not need to be too fast, and the PID control parameters of the V control loop do not need to be too large;

[0129] 3. The control cycle of the speed loop is relatively long.

[0130] In addition, the controller is also used for DC excitation bus voltage feedback control. In addition, when the speed reaches a certain value, the main exciter switches to DC excitation and adopts the bus voltage feedback control of the three-stage power generation system. This part is the same as the three-stage power generation system and will not be repeated here.

[0131] It can be seen from the above method that this scheme can construct a flux state variable electromagnetic model based on the constraint relationship between flux, excitation winding current, excitation winding self-inductance and excitation winding mutual inductance, and further construct the voltage model of the exciter and the voltage model of the generator on the basis of the electromagnetic model, accurately restore the input-output relationship between the exciter and the generator and the constraint relationship between various physical quantities, and the three-stage starter / generator simulation model constructed by this scheme effectively improves the accuracy of the simulation results.

[0132] The above are one or more simulation methods for implementing a three-stage starter / generator in this specification. Based on the same idea, this specification also provides a corresponding simulation device for a three-stage starter / generator, such as Figure 5 shown.

[0133] Figure 5A schematic diagram of a three-stage starter / generator simulation device provided in this specification includes:

[0134] A receiving module 501 is used to receive a simulation instruction for a three-stage starter / generator;

[0135] The first construction module 502 is used to construct the electromagnetic model of the flux state variable of the exciter based on the constraint relationship between the flux of the exciter, the excitation winding current, the self-inductance of the excitation winding and the mutual inductance of the excitation winding according to the simulation instruction, and to construct the electromagnetic model of the flux state variable of the generator based on the constraint relationship between the flux of the exciter, the excitation winding current, the self-inductance of the excitation winding and the mutual inductance of the excitation winding;

[0136] The second construction module 503 is used to construct a main exciter voltage model according to the exciter flux state variable electromagnetic model, based on the constraint relationship between the flux generated when each winding of the exciter stator in the main exciter passes through a forward current, the voltage of the main exciter, and the current of the main exciter;

[0137] The third construction module 504 is used to determine the generator voltage model corresponding to the generator under the driving state of the current output by the main exciter according to the main exciter voltage model and the generator flux state variable electromagnetic model;

[0138] The simulation module 505 is used to determine the simulation model of the three-stage starter / generator and perform simulation according to the main exciter voltage model and the generator voltage model.

[0139] Optionally, the first construction module 502 is specifically used to construct a first exciter electromagnetic model according to the constraint relationship between the exciter excitation winding flux, magnetic flux and coil turns; construct a second exciter electromagnetic model according to the constraint relationship between the excitation winding flux of the exciter in the direct-axis component, the self-inductance of the excitation winding in the direct-axis component and the current of the three-phase winding of the exciter stator in the direct-axis component; construct a third exciter electromagnetic model according to the constraint relationship between the excitation winding flux of the exciter in the quadrature-axis component, the self-inductance of the excitation winding in the quadrature-axis component and the current of the three-phase winding of the exciter stator in the quadrature-axis component; determine the exciter flux state variable electromagnetic model according to the first exciter electromagnetic model, the second exciter electromagnetic model and the third exciter electromagnetic model.

[0140] Optionally, the first construction module 502 is specifically used to construct a first generator electromagnetic model according to the constraint relationship between the flux linkage of the generator excitation winding, the self-inductance of the excitation winding and the excitation winding current; construct a second generator electromagnetic model according to the flux linkage of the generator excitation winding in the direct-axis component, the mutual inductance between the excitation winding and the direct-axis component of the excitation winding, and the constraint relationship between the excitation winding current; construct a third generator electromagnetic model according to the quadrature-axis component of the flux linkage of the generator excitation winding, the mutual inductance between the quadrature-axis component of the excitation winding and the excitation winding, and the constraint relationship between the excitation winding current; determine the generator flux linkage state variable electromagnetic model according to the first generator electromagnetic model, the second generator electromagnetic model and the third generator electromagnetic model.

[0141] Optionally, the second construction module 503 is specifically used to construct a voltage model of the direct axis of the three-phase stator winding of the exciter according to the electromagnetic model of the flux linkage state variable of the exciter, based on the voltage of the direct axis of the three-phase stator winding of the exciter, the current of the direct axis of the three-phase stator winding of the exciter, the resistance of each item of the three-phase stator winding of the exciter and the constraint relationship between the flux linkage of the direct axis; and construct a voltage model of the direct axis of the three-phase stator winding of the exciter according to the electromagnetic model of the flux linkage state variable of the exciter, based on the voltage of the quadrature axis of the three-phase stator winding of the exciter, the current of the quadrature axis of the three-phase stator winding of the exciter, the resistance of each item of the three-phase stator winding of the exciter and the constraint relationship between the flux linkage of the direct axis. The voltage model of the quadrature axis of the three-phase stator winding of the exciter is constructed according to the constraint relationship between the resistance of the exciter and the flux linkage of the quadrature axis; the voltage model of the exciter winding is constructed based on the constraint relationship between the voltage of the exciter rotor exciter winding, the flux linkage of the exciter winding, the current of the exciter winding and the resistance of the exciter winding according to the state variable electromagnetic model of the exciter flux. The voltage model of the main exciter is determined according to the voltage model of the direct axis of the three-phase stator winding of the exciter, the voltage model of the quadrature axis of the three-phase stator winding of the exciter and the voltage model of the exciter winding.

[0142] Optionally, the simulation module 505 is specifically used to determine a simulation model of the three-stage starter / generator under starting conditions based on the main exciter voltage model and the generator voltage model, wherein, under starting conditions, the cross-axis current of the main exciter is equal to the DC current output by the rectifier, and the main generator excitation winding current is equal to the auxiliary exciter cross-axis current.

[0143] Optionally, the simulation module 505 is also used to control the simulation model of the three-stage starter / generator during the simulation process through a preset controller.

[0144] Optionally, the simulation module 505 is specifically used to control the excitation mode of the exciter in the simulation model of the three-stage starter / generator according to the speed of the motor through the controller, and to regulate the relative position of the voltage vector of the generator and the main generator rotor during the starting process through the controller.

[0145] This specification also provides a computer-readable storage medium, which stores a computer program, which can be used to execute the above Figure 1 A simulation method for a three-stage starter / generator is provided.

[0146] This manual also provides Figure 6 The one shown corresponds to Figure 1 A schematic diagram of the electronic device. Figure 6 As mentioned above, at the hardware level, the electronic device includes a processor, an internal bus, a network interface, a memory, and a non-volatile memory, and may also include other hardware required for the business. The processor reads the corresponding computer program from the non-volatile memory into the memory and then runs it to achieve the above Figure 1 Of course, in addition to the software implementation, this specification does not exclude other implementations, such as logic devices or a combination of software and hardware, etc., that is, the execution subject of the following processing flow is not limited to each logic unit, but can also be hardware or logic devices.

[0147] For the improvement of a technology, it can be clearly distinguished whether it is a hardware improvement (for example, improvement of the circuit structure of diodes, transistors, switches, etc.) or a software improvement (improvement of the method flow). However, with the development of technology, many improvements of the method flow today can be regarded as direct improvements of the hardware circuit structure. Designers almost always obtain the corresponding hardware circuit structure by programming the improved method flow into the hardware circuit. Therefore, it cannot be said that the improvement of a method flow cannot be implemented with a hardware entity module. For example, a programmable logic device (PLD) (such as a field programmable gate array (FPGA)) is such an integrated circuit whose logical function is determined by the user's programming of the device. Designers can "integrate" a digital system on a PLD by programming themselves, without having to ask chip manufacturers to design and make dedicated integrated circuit chips. Moreover, nowadays, instead of manually making integrated circuit chips, this kind of programming is mostly implemented by "logic compiler" software, which is similar to the software compiler used when developing and writing programs, and the original code before compilation must also be written in a specific programming language, which is called hardware description language (HDL). There is not only one kind of HDL, but many kinds, such as ABEL (Advanced Boolean Expression Language), AHDL (Altera Hardware Description Language), Confluence, CUPL (Cornell University Programming Language), HDCal, JHDL (Java Hardware Description Language), Lava, Lola, MyHDL, PALASM, RHDL (Ruby Hardware Description Language), etc. The most commonly used ones are VHDL (Very-High-Speed ​​Integrated Circuit Hardware Description Language) and Verilog. Those skilled in the art should also know that it is only necessary to program the method flow slightly in the above-mentioned hardware description languages ​​and program it into the integrated circuit, and then it is easy to obtain the hardware circuit that implements the logic method flow.

[0148] The controller may be implemented in any suitable manner, for example, the controller may take the form of a microprocessor or processor and a computer-readable medium storing a computer-readable program code (e.g., software or firmware) executable by the (micro)processor, a logic gate, a switch, an application-specific integrated circuit (ASIC), a programmable logic controller, and an embedded microcontroller, examples of which include but are not limited to the following microcontrollers: ARC 625D, Atmel AT91SAM, Microchip PIC18F26K20, and Silicone Labs C8051F320, and the memory controller may also be implemented as part of the control logic of the memory. It is also known to those skilled in the art that, in addition to implementing the controller in a purely computer-readable program code manner, the controller may be implemented in the form of a logic gate, a switch, an application-specific integrated circuit, a programmable logic controller, and an embedded microcontroller by logically programming the method steps. Therefore, such a controller may be considered as a hardware component, and the devices for implementing various functions included therein may also be considered as structures within the hardware component. Or even, the devices for implementing various functions may be considered as both software modules for implementing the method and structures within the hardware component.

[0149] The systems, devices, modules or units described in the above embodiments may be implemented by computer chips or entities, or by products with certain functions. A typical implementation device is a computer. Specifically, the computer may be, for example, a personal computer, a laptop computer, a cellular phone, a camera phone, a smart phone, a personal digital assistant, a media player, a navigation device, an email device, a game console, a tablet computer, a wearable device, or a combination of any of these devices.

[0150] For the convenience of description, the above device is described in various units according to their functions. Of course, when implementing this specification, the functions of each unit can be implemented in the same or multiple software and / or hardware.

[0151] Those skilled in the art will appreciate that the embodiments of this specification may be provided as methods, systems, or computer program products. Therefore, this specification may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, this specification may 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.) containing computer-usable program code.

[0152] This specification is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of this specification. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0153] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0154] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0155] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0156] The memory may include non-permanent storage in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0157] Computer readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.

[0158] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0159] It should be understood by those skilled in the art that the embodiments of this specification may be provided as methods, systems or computer program products. Therefore, this specification may take the form of a complete hardware embodiment, a complete software embodiment or an embodiment combining software and hardware. Moreover, this specification may 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.) containing computer-usable program code.

[0160] This specification may be described in the general context of computer-executable instructions executed by a computer, such as program modules. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform specific tasks or implement specific abstract data types. This specification may also be practiced in distributed computing environments where tasks are performed by remote processing devices connected through a communication network. In a distributed computing environment, program modules may be located in local and remote computer storage media, including storage devices.

[0161] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0162] The above description is only an embodiment of the present specification and is not intended to limit the present specification. For those skilled in the art, the present specification may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present specification shall be included in the scope of the claims of the present specification.

Claims

1. A three-stage starter / generator simulation method, characterized in that: include: Receive simulation instructions for a three-stage starter / generator; According to the simulation instruction, based on the constraint relationship between the magnetic flux, magnetic flux and coil turns of the excitation machine excitation winding, a first excitation machine electromagnetic model is constructed; according to the constraint relationship between the magnetic flux of the excitation machine excitation winding in the direct axis component, the self-inductance of the excitation winding in the direct axis component and the current of the three-phase winding of the excitation machine stator in the direct axis component, a second excitation machine electromagnetic model is constructed; according to the constraint relationship between the magnetic flux of the excitation machine excitation winding in the quadrature axis component, the self-inductance of the excitation winding in the quadrature axis component and the current of the three-phase winding of the excitation machine stator in the quadrature axis component, a third excitation machine electromagnetic model is constructed; according to the first excitation machine electromagnetic model, the second excitation machine electromagnetic model and the third excitation machine electromagnetic model, the excitation machine magnetic flux state variable is determined Electromagnetic model, and, according to the constraint relationship between the flux linkage of the generator excitation winding, the self-inductance of the excitation winding and the excitation winding current, construct a first generator electromagnetic model; according to the flux linkage of the generator excitation winding in the direct axis component, the mutual inductance between the excitation winding and the direct axis component of the excitation winding, and the constraint relationship between the excitation winding current, construct a second generator electromagnetic model; according to the quadrature axis component of the flux linkage of the generator excitation winding, the mutual inductance between the quadrature axis component of the excitation winding and the excitation winding, and the constraint relationship between the excitation winding current, construct a third generator electromagnetic model; according to the first generator electromagnetic model, the second generator electromagnetic model and the third generator electromagnetic model, determine the generator flux linkage state variable electromagnetic model; According to the exciter flux state variable electromagnetic model, a main exciter voltage model is constructed based on the constraint relationship between the flux generated when each winding of the exciter stator in the main exciter passes through a forward current, the voltage of the main exciter, and the current of the main exciter; Determine, according to the main exciter voltage model and the generator flux state variable electromagnetic model, a generator voltage model corresponding to the generator under the driving state of the current output by the main exciter; According to the main exciter voltage model and the generator voltage model, a simulation model of a three-stage starter / generator is determined and simulated.

2. The method according to claim 1, characterized in that According to the flux state variable electromagnetic model, based on the constraint relationship between the flux generated when each winding of the stator in the main exciter passes through the forward current, the voltage of the main exciter and the current of the main exciter, a main exciter voltage model is constructed, which specifically includes: According to the exciter flux state variable electromagnetic model, based on the voltage of the direct axis of the exciter stator three-phase winding, the current of the direct axis of the exciter stator three-phase winding, the resistance of each item of the exciter stator three-phase winding and the constraint relationship between the direct axis flux, a voltage model of the direct axis of the exciter stator three-phase winding is constructed; According to the exciter flux state variable electromagnetic model, based on the voltage of the quadrature axis of the exciter stator three-phase winding, the current of the quadrature axis of the exciter stator three-phase winding, the resistance of each item of the exciter stator three-phase winding and the constraint relationship between the quadrature axis flux, a voltage model of the quadrature axis of the exciter stator three-phase winding is constructed; According to the exciter flux state variable electromagnetic model, based on the constraint relationship between the voltage of the exciter rotor exciter winding, the flux of the exciter winding, the current of the exciter winding and the resistance of the exciter winding, a voltage model of the exciter winding is constructed; The main exciter voltage model is determined according to the voltage model of the direct axis of the three-phase stator winding of the exciter, the voltage model of the quadrature axis of the three-phase stator winding of the exciter and the voltage model of the excitation winding.

3. The method according to claim 1, characterized in that Determining a simulation model of a three-stage starter / generator according to the main exciter voltage model and the generator voltage model specifically includes: According to the main exciter voltage model and the generator voltage model, a simulation model of the three-stage starter / generator under the starting condition is determined, wherein, under the starting condition, the quadrature-axis current of the main exciter is equal to the direct current output by the rectifier, and the main generator excitation winding current is equal to the quadrature-axis current of the auxiliary exciter.

4. The method according to claim 1, characterized in that The method further comprises: The simulation model of the three-stage starter / generator is controlled during the simulation process by a preset controller.

5. The method according to claim 4, characterized in that The simulation model of the three-stage starter / generator is controlled by a preset controller during the simulation process, specifically including: The controller is used to control the excitation mode of the exciter in the simulation model of the three-stage starter / generator according to the rotational speed of the motor, and the controller is used to regulate the relative position of the voltage vector and the main generator rotor during the starting process of the generator.

6. A three-stage starter / generator simulation device, characterized in that: include: A receiving module, used for receiving a simulation instruction for a three-stage starter / generator; The first construction module is used to construct a first exciter electromagnetic model according to the simulation instruction based on the constraint relationship between the exciter excitation winding flux, magnetic flux and coil turns, construct a second exciter electromagnetic model according to the constraint relationship between the excitation winding flux of the exciter in the direct axis component, the self-inductance of the excitation winding in the direct axis component and the current of the three-phase winding of the exciter stator in the direct axis component, construct a third exciter electromagnetic model according to the constraint relationship between the excitation winding flux of the exciter in the quadrature axis component, the self-inductance of the excitation winding in the quadrature axis component and the current of the three-phase winding of the exciter stator in the quadrature axis component, and determine the exciter flux according to the first exciter electromagnetic model, the second exciter electromagnetic model and the third exciter electromagnetic model. A state variable electromagnetic model, and, based on the constraint relationship between the generator excitation winding flux, the excitation winding self-inductance and the excitation winding current, a first generator electromagnetic model is constructed; based on the flux of the generator excitation winding in the direct axis component, the mutual inductance between the excitation winding and the direct axis component of the excitation winding, and the constraint relationship between the excitation winding current, a second generator electromagnetic model is constructed; based on the quadrature axis component of the flux of the generator excitation winding, the mutual inductance between the quadrature axis component of the excitation winding and the excitation winding, and the constraint relationship between the excitation winding current, a third generator electromagnetic model is constructed; based on the first generator electromagnetic model, the second generator electromagnetic model and the third generator electromagnetic model, a generator flux state variable electromagnetic model is determined; A second construction module is used to construct a main exciter voltage model according to the exciter flux state variable electromagnetic model, based on the constraint relationship between the flux generated when each winding of the exciter stator in the main exciter passes through a forward current, the voltage of the main exciter, and the current of the main exciter; A third construction module is used to determine a generator voltage model corresponding to the generator under the driving state of the current output by the main exciter according to the main exciter voltage model and the generator flux state variable electromagnetic model; The simulation module is used to determine the simulation model of the three-stage starter / generator and perform simulation according to the main exciter voltage model and the generator voltage model.

7. A computer-readable storage medium, characterized in that: The storage medium stores a computer program, and when the computer program is executed by a processor, the method described in any one of claims 1 to 5 is implemented.

8. An 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 program, the method described in any one of claims 1 to 5 is implemented.

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