A generator flexible control method, device, equipment and medium

Abstract

The application discloses a generator flexible control method, device, equipment and medium, and is applied to the field of generator control. The method collects the electric parameter signal on the generator side, judges whether the electric parameter signal appears a drop abnormal phenomenon, when the electric parameter signal drops to a preset safety interval and is further lower than a first reference threshold corresponding to the interval, the output voltage is flexibly reduced through a preset adjustment function, and stable control is realized by relying on a hysteresis interval formed by the first reference threshold and a second reference threshold, the voltage reduction is stopped when the signal recovers to above the second reference threshold, and the voltage reduction is maintained when the signal is between the two thresholds. It can be seen that the method realizes the cooperative action of electric parameter monitoring, abnormal judgment, flexible voltage regulation and hysteresis control, guarantees the continuous and stable operation of the mobile power supply system, and does not need to change the hardware, thereby avoiding the problems of high cost, large size and complex system caused by adding energy storage or improving the power of the generator.

Description

Technical Field

[0001] This application relates to the field of generator control, and in particular to a generator flexible control method, device, equipment and medium. Background Technology

[0002] Traditional diesel generator sets commonly suffer from technical problems when connected to high-power loads or experiencing significant load changes, including lag in generator speed response and an inability to quickly adapt output power to load demands. The main reason is that in mobile power supply systems consisting of a diesel generator set, a frequency converter, and the load, the frequency converter typically employs a constant power output control strategy. Therefore, when the load suddenly increases, the electromagnetic resistance experienced by the generator rises sharply, causing the engine speed to drop. To maintain the generator's preset constant power output, the frequency converter control system actively increases the effective current value on the generator side. When the effective current value exceeds the tolerance threshold, the system triggers overcurrent protection and performs fault shutdown operations, posing a serious threat to the safe and stable operation of the generator set, frequency converter, and downstream load equipment.

[0003] Existing solutions for instantaneous load surges mostly involve increasing the rated power capacity of the generator or adding additional energy storage units to buffer the impact of sudden load changes on the system. However, increasing the rated power of the generator significantly increases the cost, size, and weight of the equipment, and adding energy storage units also introduces the same problem of increasing the cost, size, and weight of the equipment. At the same time, it also introduces additional components such as battery management and bidirectional energy conversion, resulting in problems such as complex system structure, reduced reliability, and increased maintenance costs.

[0004] Given the aforementioned technologies, finding a control method that can achieve an efficient balance between dynamic response performance, equipment cost, and system complexity is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of this application is to provide a generator flexible control method, device, equipment, and medium. This can solve the problems in the prior art where generators easily experience speed drops, rapid current increases, and trigger overcurrent protection shutdowns when the load suddenly increases. It also addresses the issues of high cost, large size, system complexity, and unsuitability for mobile power supply scenarios caused by the need for additional energy storage units and increased generator rated power in existing solutions.

[0006] To address the aforementioned technical problems, this application provides a generator flexible control method, comprising: Collect electrical parameter signals from the generator side; Determine whether the electrical parameter signal has dropped to the preset safe range corresponding to the rated parameter signal; If the electrical parameter signal drops to the preset safe range of the rated parameter signal, and the electrical parameter signal is below the first reference threshold corresponding to the preset safe range, the output voltage is reduced based on the preset adjustment function in order to reduce the power output capability of the train system. When the electrical parameter signal recovers to above the second reference threshold corresponding to the preset safety range, the operation of reducing the output voltage is stopped; When the electrical parameter signal recovers to between the first reference threshold and the second reference threshold, the current operation of reducing the output voltage is maintained; wherein, the interval formed by the first reference threshold and the second reference threshold is used as the hysteresis interval for adjusting the output voltage.

[0007] Preferably, when the electrical parameter signal is a frequency signal, determining whether the electrical parameter signal has fallen into the preset safe range corresponding to the rated parameter signal includes: Based on the rated frequency value corresponding to the rated frequency signal of the generator, the range of 70%-90% of the rated frequency signal is taken as the preset safe range. The frequency signal is subjected to a first-order low-pass filter to obtain a stable frequency detection value. The frequency detection value is compared with the preset safe range to determine whether the frequency detection value is within the preset safe range. If so, the frequency signal is determined to have fallen into the preset safe range; If not, it is determined that the frequency signal has not fallen into the preset safe range.

[0008] Preferably, when the electrical parameter signal is a frequency signal, determining whether the electrical parameter signal has fallen into the preset safe range corresponding to the rated parameter signal includes: Based on the rated speed value corresponding to the rated speed signal of the generator, the range of 70%-90% of the rated speed signal is taken as the preset safe range. Based on the relationship between generator speed and frequency, the frequency signal is converted into a speed signal; The speed signal is subjected to a first-order low-pass filter to obtain a stable speed detection value; The speed detection value is compared with the preset safety range to determine whether the speed detection value is within the preset safety range; If so, the frequency signal is determined to have fallen into the preset safe range; If not, it is determined that the frequency signal has not fallen into the preset safe range.

[0009] Preferably, it further includes: Acquire the current signal from the inverter's machine side and determine the corresponding rate of change of current. The rate of change of current is compared with a preset threshold for the rate of change of current to determine whether the rate of change of current exceeds the threshold. If the rate of change of current exceeds the threshold of the rate of change of current, an overcurrent risk is predicted, the electrical parameter signal will be determined in advance to drop to the preset safe range, and the operation of reducing the output voltage based on the preset adjustment function will be initiated in advance.

[0010] Preferably, acquiring the current signal from the inverter's machine side and determining the corresponding rate of change of current includes: The three-phase current signal of the inverter is acquired in real time using a current sensor; The collected three-phase current signals are denoised and preprocessed to obtain stable current sampling values; Multiple sets of current sampling values ​​are continuously collected according to a preset sampling period, and the difference between the current sampling values ​​in two adjacent sampling periods is calculated by the differential method. Divide the difference by the sampling period to obtain the rate of change of the current corresponding to the current signal.

[0011] Preferably, the adjustment function is a nonlinear adjustment function.

[0012] On the other hand, this application also provides a generator flexible control device, comprising: The acquisition module is used to acquire electrical parameter signals from the generator side; The judgment module is used to determine whether the electrical parameter signal has dropped to the preset safe range corresponding to the rated parameter signal; The adjustment module is used to reduce the output voltage based on a preset adjustment function when the electrical parameter signal drops to a preset safe range of the rated parameter signal and the electrical parameter signal is below the first reference threshold corresponding to the preset safe range, so as to reduce the power output capability of the train system. The first hysteresis adjustment module is used to stop the operation of reducing the output voltage when the electrical parameter signal recovers to above the second reference threshold corresponding to the preset safety range; The second hysteresis adjustment module is used to maintain the current operation of reducing the output voltage when the electrical parameter signal recovers to between the first reference threshold and the second reference threshold; wherein the interval formed by the first reference threshold and the second reference threshold is used as the hysteresis interval for adjusting the output voltage.

[0013] Preferably, it further includes: The acquisition module is used to acquire the current signal on the inverter side and determine the current change rate corresponding to the current signal; The rate of change judgment module is used to compare the current rate of change with a preset current rate of change threshold to determine whether the current rate of change exceeds the current rate of change threshold. The prediction module is used to predict the risk of overcurrent when the rate of change of current exceeds the current rate of change threshold, to determine in advance that the electrical parameter signal will drop to the preset safe range, and to initiate the operation of reducing the output voltage based on the preset adjustment function in advance.

[0014] On the other hand, this application also provides an electronic device, including a memory for storing computer programs; A processor is used to execute computer programs to implement the steps of the above-described generator flexible control method.

[0015] On the other hand, this application also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps of the above-described generator flexible control method.

[0016] In the generator flexible control method provided in this application, electrical parameter signals from the generator side are collected, and the electrical parameter signals are compared with the preset safety range corresponding to the rated parameter signals to determine whether the electrical parameter signals have dropped abnormally. When it is determined that the electrical parameter signals have dropped to the preset safety range and are further lower than the first reference threshold corresponding to the range, the output voltage is flexibly reduced through a preset adjustment function, thereby reducing the power output capability of the train system and laying the foundation for the generator speed recovery. At the same time, precise and stable control is achieved by using the hysteresis range formed by the first reference threshold and the second reference threshold. When the electrical parameter signals recover to above the second reference threshold, the voltage reduction operation is stopped, and when they recover to between the two thresholds, the current voltage reduction operation is maintained to avoid frequent switching of adjustment that could lead to system instability. Therefore, this method, based on the collaborative efforts of electrical parameter signal acquisition, drop anomaly judgment, voltage reduction regulation, and hysteresis interval, suppresses further increases in the generator's electromagnetic resistance torque, reserves time for generator speed recovery, and avoids overcurrent protection triggering. This ensures the continuous and stable operation of the mobile power supply system, thus solving the technical problems of traditional diesel generator sets where, under sudden increases in high-power loads, the generator speed response is lagging, the output power cannot quickly match the load demand, leading to a sudden increase in electromagnetic resistance torque, a sharp drop in speed, triggering overcurrent protection shutdown, and affecting power supply continuity. Furthermore, this application does not make any hardware improvements, solving the problems of high cost, large size, and increased system complexity caused by the need for additional energy storage units or increased generator rated power in existing solutions. In addition, the hysteresis interval design in this application also solves the technical problems of control instability and unsafe equipment operation caused by frequent adjustment switching and easy false triggering. Attached Figure Description

[0017] To more clearly illustrate the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1A flowchart of a generator flexible control method provided in an embodiment of this application; Figure 2 A block diagram of a generator flexible control device provided in another embodiment of this application; Figure 3 A structural diagram of an electronic device provided in another embodiment of this application. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this application.

[0020] The core of this application is to provide a generator flexible control method, device, equipment, and medium.

[0021] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] Figure 1 A flowchart of a generator flexible control method provided in an embodiment of this application is shown below. Figure 1 As shown, it includes the following steps: S10: Acquire electrical parameter signals from the generator side.

[0023] S11: Determine whether the electrical parameter signal has dropped to the preset safe range corresponding to the rated parameter signal.

[0024] S12: If the electrical parameter signal drops to the preset safe range of the rated parameter signal, and the electrical parameter signal is below the first reference threshold corresponding to the preset safe range, the output voltage is reduced based on the preset adjustment function in order to reduce the power output capability of the train system.

[0025] S13: When the electrical parameter signal recovers to above the second reference threshold corresponding to the preset safety range, stop the operation of reducing the output voltage.

[0026] S14: When the electrical parameter signal recovers to between the first reference threshold and the second reference threshold, maintain the current operation of reducing the output voltage; wherein, the interval formed by the first reference threshold and the second reference threshold is used as the hysteresis interval for adjusting the output voltage.

[0027] In a specific embodiment, the generator flexible control method provided in this application is specifically applied to a mobile power supply system consisting of a diesel generator set, a frequency converter, and a load (which can also be understood as an electrical load). This system requires no modification to the existing hardware structure; by simply executing the method provided in this application within the frequency converter control system, it can achieve real-time monitoring of the generator's operating status, prediction of sudden load changes, and flexible adjustment of the output voltage. This improves the adaptability of the diesel generator set to sudden high-power loads without increasing hardware costs or changing the system structure.

[0028] The specific operation is as follows: First, the electrical parameter signal of the generator side is collected in real time through step S10 so as to reflect the current operating status of the generator based on the electrical parameter signal; then, in step S11, it is determined whether the electrical parameter signal has fallen into the preset safety range corresponding to the rated parameter signal (e.g., 70%-90% of the rated parameter signal) to determine whether there is a decrease in generator speed or abnormal operation caused by a sudden increase in load; when it is determined that the electrical parameter signal has fallen into the preset safety range and is further lower than the first reference threshold corresponding to the preset safety range (e.g., 85% of the rated parameter signal), the output voltage is flexibly reduced based on the preset adjustment function through step S12, thereby reducing the power output capability of the train system, reducing the electromagnetic resistance torque borne by the generator, and creating conditions for the generator speed to recover. During the adjustment process, stable hysteresis control is achieved through steps S13 and S14. When the electrical parameter signal recovers to above the second reference threshold corresponding to the preset safety range (e.g., 92% of the rated parameter signal), the operation of reducing the output voltage is stopped, allowing the system to gradually return to normal operation. When the electrical parameter signal recovers to between the first and second reference thresholds, the current operation of reducing the output voltage is maintained. The hysteresis range formed by the first and second reference thresholds can effectively avoid frequent switching actions and malfunctions, thereby achieving flexible adjustment of the generator's operating state without modifying the hardware, ensuring that the system does not trigger overcurrent protection during sudden load changes and provides continuous and stable power supply.

[0029] It should be noted that the electrical parameter signals can be frequency signals, voltage signals, and current signals, etc.; the adjustment function can be a ramp function, an exponential curve function, a piecewise linear function, or other nonlinear functions, etc. The parameter coefficients in the specific function can be adaptively modified to adapt to different generator characteristics and load types.

[0030] In the generator flexible control method provided in this application, electrical parameter signals from the generator side are collected, and the electrical parameter signals are compared with the preset safety range corresponding to the rated parameter signals to determine whether the electrical parameter signals have dropped abnormally. When it is determined that the electrical parameter signals have dropped to the preset safety range and are further lower than the first reference threshold corresponding to the range, the output voltage is flexibly reduced through a preset adjustment function, thereby reducing the power output capability of the train system and laying the foundation for the generator speed recovery. At the same time, precise and stable control is achieved by using the hysteresis range formed by the first reference threshold and the second reference threshold. When the electrical parameter signals recover to above the second reference threshold, the voltage reduction operation is stopped, and when they recover to between the two thresholds, the current voltage reduction operation is maintained to avoid frequent switching of adjustment that could lead to system instability. Therefore, this method, based on the collaborative efforts of electrical parameter signal acquisition, drop anomaly judgment, voltage reduction regulation, and hysteresis interval, suppresses further increases in the generator's electromagnetic resistance torque, reserves time for generator speed recovery, and avoids overcurrent protection triggering. This ensures the continuous and stable operation of the mobile power supply system, thus solving the technical problems of traditional diesel generator sets where, under sudden increases in high-power loads, the generator speed response is lagging, the output power cannot quickly match the load demand, leading to a sudden increase in electromagnetic resistance torque, a sharp drop in speed, triggering overcurrent protection shutdown, and affecting power supply continuity. Furthermore, this application does not make any hardware improvements, solving the problems of high cost, large size, and increased system complexity caused by the need for additional energy storage units or increased generator rated power in existing solutions. In addition, the hysteresis interval design in this application also solves the technical problems of control instability and unsafe equipment operation caused by frequent adjustment switching and easy false triggering.

[0031] Based on the above embodiments, as a preferred embodiment, when the electrical parameter signal is a frequency signal, determining whether the electrical parameter signal has fallen to the preset safe range corresponding to the rated parameter signal includes two implementation methods.

[0032] The first implementation method is as follows: Based on the rated frequency value corresponding to the rated frequency signal of the generator, the range of 70%-90% of the rated frequency signal is taken as the preset safe range; the frequency signal is subjected to first-order low-pass filtering to obtain a stable frequency detection value; the frequency detection value is compared with the preset safe range to determine whether the frequency detection value is within the preset safe range; if so, it is determined that the frequency signal has fallen into the preset safe range; if not, it is determined that the frequency signal has not fallen into the preset safe range.

[0033] In a specific embodiment, the rated frequency value corresponding to the rated frequency signal of the generator is first used as a reference. The range of 70% to 90% of the rated frequency signal is set as a preset safe range that can reflect abnormal load changes in the generator. Then, the collected raw frequency signal is subjected to first-order low-pass filtering to filter out fluctuation interference and noise interference in the signal, thereby obtaining a stable and reliable frequency detection value that can reflect the actual operating status of the generator. Subsequently, the frequency detection value is compared with the preset safe range in real time to determine whether the frequency detection value falls within the preset safe range. If the frequency detection value is between 70% and 90% of the rated frequency signal, it is determined that the current frequency signal has fallen into the preset safe range, indicating that the generator has experienced an abnormal operation due to a sudden increase in load, and the subsequent flexible voltage reduction regulation logic can be triggered. If the frequency detection value is not within the preset safe range (within the 100%-90% range), it is determined that the generator is operating normally and no adjustment operation is required. In other words, if it does not fall into this range (below 70%), it is determined that the generator is operating abnormally. At this time, it cannot be alleviated by automatic adjustment and manual operation by the operator is required.

[0034] The second implementation method is as follows: Based on the rated speed value corresponding to the rated speed signal of the generator, the range of 70%-90% of the rated speed signal is taken as the preset safety range; according to the correspondence between the generator speed and frequency, the frequency signal is converted into a speed signal; the speed signal is subjected to first-order low-pass filtering to obtain a stable speed detection value; the speed detection value is compared with the preset safety range to determine whether the speed detection value is within the preset safety range; if so, it is determined that the frequency signal has fallen into the preset safety range; if not, it is determined that the frequency signal has not fallen into the preset safety range.

[0035] In a specific embodiment, the rated speed value corresponding to the rated speed signal of the generator is used as a benchmark. The 70%-90% range of the rated speed signal is set as a preset safe range to reflect abnormal generator operation. After the frequency signal on the generator side is collected, the frequency signal is converted into the corresponding speed signal according to the inherent correspondence between generator speed and frequency. Then, the speed signal is subjected to first-order low-pass filtering to filter out fluctuation interference and noise interference in the signal, thereby obtaining a stable and reliable speed detection value that can reflect the actual operating status of the generator. Subsequently, the speed detection value is compared with the preset safe range to determine whether it falls within the 70%-90% range of the rated speed. If it falls within this range, it is determined that the frequency signal has fallen into the preset safe range, indicating that the generator has an abnormal operation due to a sudden increase in load, and the subsequent flexible voltage reduction adjustment process can be initiated. If it does not fall within this range (within the 100%-90% range), it is determined that the generator is operating normally and no adjustment operation is required. Or, if it does not fall within this range (below 70%), it is determined that the generator is operating abnormally, and automatic adjustment cannot alleviate the problem; manual operation by the operator is required.

[0036] Therefore, it can be seen that both implementation methods provided in this application can accurately identify abnormal operation of generators caused by sudden load increases without adding hardware or changing the equipment structure. By filtering, signal interference is effectively filtered out, avoiding false triggering caused by signal fluctuations. At the same time, by adopting the method of direct frequency judgment or indirect judgment by frequency conversion to speed, the stability and applicability of detection are improved, which not only ensures the timeliness of control response, but also makes the system operation more stable and reliable.

[0037] Based on the above embodiments, as a preferred embodiment, the method further includes: Acquire the current signal from the inverter's machine side and determine the corresponding rate of change of current. The rate of change of current is compared with a preset threshold for the rate of change of current to determine whether the rate of change of current exceeds the threshold. If the rate of change of current exceeds the threshold of the rate of change of current, an overcurrent risk is predicted, the electrical parameter signal will be determined in advance to drop to the preset safe range, and the operation of reducing the output voltage based on the preset adjustment function will be initiated in advance.

[0038] It acquires the current signal from the inverter side and determines the current change rate corresponding to the current signal, including: using a current sensor to collect the three-phase current signal from the inverter side in real time; performing noise reduction preprocessing on the collected three-phase current signal to obtain stable current sampling values; continuously collecting multiple sets of current sampling values ​​according to a preset sampling period, calculating the difference between the current sampling values ​​in two adjacent sampling periods using the differential method; and dividing the difference by the sampling period to obtain the current change rate corresponding to the current signal.

[0039] In a specific embodiment, the three-phase current signal of the inverter is collected in real time by a current sensor. The three-phase current signal is first denoised to obtain a stable current sampling value. Then, it is continuously sampled at fixed time intervals. The difference between two adjacent current sampling values ​​is divided by the time interval to calculate the rate of change of the current, that is, the rate of change of the current. When this rate of change exceeds the set threshold, the system can predict in advance that an overcurrent danger is about to occur and actively reduce the output voltage without the need for the electrical parameter signal to actually drop.

[0040] Therefore, the predictive method provided in this application can respond quickly to sudden increases in load, intervene in control earlier, and effectively avoid instantaneous current surges triggering protection actions, thereby causing the system to shut down. At the same time, it does not require additional hardware or modification of the equipment structure, thus improving system safety and stability, and making the entire control process more reliable and responsive.

[0041] In addition, in the generator flexible control method provided in this application, a closed-loop control model is constructed by combining the frequency signal obtained above, which can realize adaptive optimization of adjusting the amplitude and rate of the current system.

[0042] Therefore, the generator flexible control method provided in this application has the following advantages: 1. No need to increase generator rated power: Improve the system's adaptability to sudden load increases without increasing generator capacity, and avoid over-selection of equipment.

[0043] 2. Avoid overcurrent fault shutdown: By actively adjusting the output voltage, the current increase on the machine side is limited, preventing the frequency converter from shutting down due to overcurrent protection and ensuring power supply continuity.

[0044] 3. Achieve a smooth transition from load commissioning: The system maintains operation in a temporary adjustment state and automatically exits after the generator speed recovers, achieving a seamless transition from disturbance to stability.

[0045] 4. Strong compatibility and easy engineering implementation: The control method can be upgraded based on the existing frequency converter control system algorithm without modifying the main circuit structure, which is convenient for promotion and application in existing equipment.

[0046] In the above embodiments, the generator flexible control method has been described in detail. This application also provides embodiments corresponding to the generator flexible control device. It should be noted that this application describes the embodiments of the device from two perspectives: one is based on the functional modules, and the other is based on the hardware.

[0047] Figure 2 A block diagram of a generator flexible control device provided in another embodiment of this application, as shown below.Figure 2 As shown, it includes: Acquisition module 11 is used to acquire electrical parameter signals from the generator side; The judgment module 12 is used to determine whether the electrical parameter signal has dropped to the preset safe range corresponding to the rated parameter signal; The adjustment module 13 is used to reduce the output voltage based on a preset adjustment function when the electrical parameter signal drops to a preset safe range of the rated parameter signal and the electrical parameter signal is below the first reference threshold corresponding to the preset safe range, so as to reduce the power output capability of the train system. The first hysteresis adjustment module 14 is used to stop the operation of reducing the output voltage when the electrical parameter signal recovers to above the second reference threshold corresponding to the preset safety range; The second hysteresis adjustment module 15 is used to maintain the current operation of reducing the output voltage when the electrical parameter signal recovers to between the first reference threshold and the second reference threshold; wherein the interval formed by the first reference threshold and the second reference threshold is used as the hysteresis interval for adjusting the output voltage.

[0048] In addition, it also includes: The acquisition module is used to acquire the current signal on the inverter side and determine the current change rate corresponding to the current signal; The rate of change judgment module is used to compare the current rate of change with a preset current rate of change threshold to determine whether the current rate of change exceeds the current rate of change threshold. The prediction module is used to predict the risk of overcurrent when the rate of change of current exceeds the current rate of change threshold, to determine in advance that the electrical parameter signal will drop to the preset safe range, and to initiate the operation of reducing the output voltage based on the preset adjustment function in advance.

[0049] Since the embodiments of the apparatus and the embodiments of the method correspond to each other, please refer to the description of the embodiments of the method for the embodiments of the apparatus, which will not be repeated here.

[0050] Figure 3 A structural diagram of an electronic device provided in another embodiment of this application, such as... Figure 3 As shown, the electronic device includes: a memory 20 for storing computer programs; The processor 21 is used to execute a computer program to implement the steps of the generator flexible control method mentioned in the above embodiments.

[0051] The electronic devices provided in this embodiment may include, but are not limited to, smartphones, tablets, laptops, or desktop computers.

[0052] The processor 21 may include one or more processing cores, such as a quad-core processor or an octa-core processor. The processor 21 may be implemented using at least one of the following hardware forms: Digital Signal Processor (DSP), Field-Programmable Gate Array (FPGA), or Programmable Logic Array (PLA). The processor 21 may also include a main processor and a coprocessor. The main processor, also known as the Central Processing Unit (CPU), is used to process data in the wake-up state; the coprocessor is a low-power processor used to process data in the standby state. In some embodiments, the processor 21 may integrate a Graphics Processing Unit (GPU), which is responsible for rendering and drawing the content to be displayed on the screen. In some embodiments, the processor 21 may also include an Artificial Intelligence (AI) processor, which is used to handle computational operations related to machine learning.

[0053] The memory 20 may include one or more computer-readable storage media, which may be non-transitory. The memory 20 may also include high-speed random access memory and non-volatile memory, such as one or more disk storage devices or flash memory devices. In this embodiment, the memory 20 is used to store at least the following computer program 201, which, after being loaded and executed by the processor 21, is capable of implementing the relevant steps of the generator flexible control method disclosed in any of the foregoing embodiments. In addition, the resources stored in the memory 20 may also include an operating system 202 and data 203, and the storage method may be temporary storage or permanent storage. The operating system 202 may include Windows, Unix, Linux, etc.

[0054] In some embodiments, the electronic device may further include a display screen 22, an input / output interface 23, a communication interface 24, a power supply 25, and a communication bus 26.

[0055] Those skilled in the art will understand that Figure 3 The structures shown do not constitute a limitation on electronic devices and may include more or fewer components than those shown.

[0056] The electronic device provided in this application includes a memory and a processor. When the processor executes the program stored in the memory, it can implement the generator flexible control method provided above and has the same beneficial effects.

[0057] Finally, this application also provides an embodiment corresponding to a computer-readable storage medium. The computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps described in the above method embodiments.

[0058] It is understood that if the methods in the above embodiments are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and executes all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0059] The foregoing provides a detailed description of a generator flexible control method, apparatus, device, and medium provided in this application. The various embodiments in the specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to in the method section. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

[0060] It should also be noted that, in this specification, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A generator flexible control method, characterized in that, include: Collect electrical parameter signals from the generator side; Determine whether the electrical parameter signal has fallen into the preset safe range corresponding to the rated parameter signal; If the electrical parameter signal falls into the preset safe range of the rated parameter signal, and the electrical parameter signal is below the first reference threshold corresponding to the preset safe range, the output voltage is reduced based on a preset adjustment function in order to reduce the power output capability of the train system. When the electrical parameter signal recovers to above the second reference threshold corresponding to the preset safety range, the operation of reducing the output voltage is stopped; When the electrical parameter signal recovers to between the first reference threshold and the second reference threshold, the current operation of reducing the output voltage is maintained; wherein, the interval formed by the first reference threshold and the second reference threshold serves as the hysteresis interval for adjusting the output voltage.

2. The generator flexible control method according to claim 1, characterized in that, When the electrical parameter signal is a frequency signal, determining whether the electrical parameter signal has fallen into the preset safe range corresponding to the rated parameter signal includes: Based on the rated frequency value corresponding to the rated frequency signal of the generator, the range of 70%-90% of the rated frequency signal is taken as the preset safety range. The frequency signal is subjected to a first-order low-pass filter to obtain a stable frequency detection value; The frequency detection value is compared with the preset safety range to determine whether the frequency detection value is within the preset safety range; If so, then the frequency signal is determined to have fallen into the preset safe range; If not, it is determined that the frequency signal has not fallen into the preset safe range.

3. The generator flexible control method according to claim 1, characterized in that, When the electrical parameter signal is a frequency signal, determining whether the electrical parameter signal has fallen into the preset safe range corresponding to the rated parameter signal includes: Based on the rated speed value corresponding to the rated speed signal of the generator, the range of 70%-90% of the rated speed signal is taken as the preset safe range; Based on the correspondence between the generator's rotational speed and frequency, the frequency signal is converted into a rotational speed signal; The rotational speed signal is subjected to a first-order low-pass filter to obtain a stable rotational speed detection value; The speed detection value is compared with the preset safety range to determine whether the speed detection value is within the preset safety range; If so, then the frequency signal is determined to have fallen into the preset safe range; If not, it is determined that the frequency signal has not fallen into the preset safe range.

4. The generator flexible control method according to claim 1, characterized in that, Also includes: Acquire the current signal from the inverter's machine side and determine the current change rate corresponding to the current signal; The current change rate is compared with a preset current change rate threshold to determine whether the current change rate exceeds the current change rate threshold. If the rate of change of current exceeds the threshold of the rate of change of current, an overcurrent risk is predicted, the electrical parameter signal is determined in advance to fall into the preset safe range, and the operation of reducing the output voltage based on the preset adjustment function is initiated in advance.

5. The generator flexible control method according to claim 4, characterized in that, The step of acquiring the current signal on the inverter side and determining the current change rate corresponding to the current signal includes: The three-phase current signal of the inverter is acquired in real time using a current sensor. The collected three-phase current signals are denoised and preprocessed to obtain stable current sampling values; Multiple sets of current sample values ​​are continuously collected according to a preset sampling period, and the difference between the current sample values ​​in two adjacent sampling periods is calculated by the difference method. Dividing the difference by the sampling period yields the current change rate corresponding to the current signal.

6. The generator flexible control method according to any one of claims 1-5, characterized in that, The adjustment function is a nonlinear adjustment function.

7. A generator flexible control device, characterized in that, include: The acquisition module is used to acquire electrical parameter signals from the generator side; The judgment module is used to determine whether the electrical parameter signal has fallen into the preset safe range corresponding to the rated parameter signal; The adjustment module is used to reduce the output voltage based on a preset adjustment function when the electrical parameter signal falls to the preset safety range of the rated parameter signal and the electrical parameter signal is below the first reference threshold corresponding to the preset safety range, so as to reduce the power output capability of the train system. The first hysteresis adjustment module is used to stop reducing the output voltage when the electrical parameter signal recovers to above the second reference threshold corresponding to the preset safety range; The second hysteresis adjustment module is used to maintain the current operation of reducing the output voltage when the electrical parameter signal recovers to between the first reference threshold and the second reference threshold; wherein the interval formed by the first reference threshold and the second reference threshold is used as the hysteresis interval for adjusting the output voltage.

8. The generator flexible control device according to claim 7, characterized in that, Also includes: The acquisition module is used to acquire the current signal on the inverter side and determine the current change rate corresponding to the current signal; The rate of change judgment module is used to compare the current rate of change with a preset current rate of change threshold to determine whether the current rate of change exceeds the current rate of change threshold. The prediction module is used to predict the risk of overcurrent when the rate of change of current exceeds the threshold of the rate of change of current, to determine in advance that the electrical parameter signal will drop to the preset safe range, and to initiate the operation of reducing the output voltage based on the preset adjustment function in advance.

9. An electronic device, characterized in that, Includes memory used to store computer programs; A processor for executing the computer program to implement the steps of the generator flexible control method as described in any one of claims 1 to 6.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the steps of the generator flexible control method as described in any one of claims 1 to 6.

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