Unit state analysis method and analysis system based on centralized control system

Abstract

The invention relates to a unit state analysis method and system based on a centralized control system. The method comprises the steps that bending deformation parameters of a rotating spindle are continuously obtained; drawing vibration amplitude curves associated with the rotating blades according to the deformation parameters, wherein each rotating blade has one vibration amplitude curve; the similarity of any two vibration amplitude curves is compared, the overlapping position is determined, the state of the rotating blade is determined according to the overlapping position, the state of the rotating blade comprises a normal rotating state, an inclined rotating state and a vibration state, and when the state of the rotating blade is determined, the temperature distribution parameter of the main bearing and the vibration parameter of the rotating blade are obtained. According to the unit state analysis method and analysis system based on the centralized control system, the working state of the rotating blade is determined by analyzing the rotating main shaft, meanwhile, auxiliary judgment is conducted by means of existing sensors at other positions, and unit state analysis can be achieved under the condition that the number of sensors is limited.

Description

Technical Field

[0001] The present application relates to the technical field of data processing, and in particular to a unit status analysis method and analysis system based on a centralized control system. Background Art

[0002] A centralized control system is a system that uses computers, automated control and communication technologies to remotely monitor and control equipment and systems distributed in different locations. In the field of renewable energy power generation, centralized control systems are widely used. This is mainly because the working environment of renewable energy power generation is complex, and sensors deployed in multiple locations are needed to understand the working status of renewable energy power generation equipment and make adjustments.

[0003] Deploying sensors can solve the problem of insufficient data to a certain extent, but considering the impact of various environmental factors, it is necessary to use multi-location sensors to obtain the relevant operating conditions of the equipment. Too many sensors deployed will also lead to maintenance difficulties. Too many sensors will cause negative effects. How to judge the operating status of new energy power generation equipment with fewer sensors requires further research. Summary of the invention

[0004] The present application provides a unit status analysis method and analysis system based on a centralized control system, which determines the working status of the rotating blades by analyzing the rotating main shaft, and uses existing sensors at other locations for auxiliary judgment, thereby realizing the status analysis of the unit under the condition of a limited number of sensors.

[0005] The above-mentioned purpose of the present application is achieved through the following technical solutions:

[0006] In a first aspect, the present application provides a unit status analysis method based on a centralized control system, comprising:

[0007] Continuously obtain the bending deformation parameters of the rotating spindle;

[0008] Draw a vibration amplitude curve associated with the rotating blade according to the deformation parameter, each rotating blade has a vibration amplitude curve, the abscissa of the vibration amplitude curve is the circumferential position, and the ordinate of the vibration amplitude curve is the circumferential size change;

[0009] Compare the similarity of any two vibration amplitude curves to determine the overlapping position;

[0010] Determine the state of the rotating blade according to the overlapping position, the state of the rotating blade including a normal rotating state, a tilted rotating state and a trembling state;

[0011] Wherein, when determining the state of the rotating blade, it also includes obtaining the temperature distribution parameters of the main bearing and the vibration parameters of the rotating blade.

[0012] In a possible implementation manner of the first aspect, comparing the similarity of any two vibration amplitude curves and determining the overlapping position includes:

[0013] The vibration amplitude curve is filtered and removed using a filter, and the part of the vibration amplitude curve whose frequency is within the coverage range of the filter is filtered out to obtain a processed vibration amplitude curve;

[0014] Determine the amplitude variation region of two primary processing vibration amplitude curves;

[0015] When there is an overlapped segment in the amplitude change regions on the two primary processing vibration amplitude curves, the overlapped segment is recorded as the overlapping position.

[0016] In a possible implementation manner of the first aspect, determining the amplitude change region of two primary processing vibration amplitude curves includes:

[0017] The two once processed vibration amplitude curves are transferred into the time domain and frequency domain for processing to obtain two vibration amplitude curve groups;

[0018] Selecting curves from the two vibration amplitude curve groups respectively to obtain a selected curve group, wherein the difference between the starting time point and the ending time point of the selected composite curve corresponding to the selected curve group are both within the allowable range;

[0019] Determine the amplitude change area according to the starting time point and the ending time point;

[0020] Therein, the amplitude of the selected synthetic curve tends to increase first and then tends to decrease.

[0021] In a possible implementation manner of the first aspect, determining the state of the rotating blade according to the overlap area of ​​the overlapping position includes:

[0022] When the position of the overlapped area is fixed, the rotating blade is in a tilted rotating state;

[0023] When the position of the overlapped area is not fixed or does not exist, the rotating blade is in a normal rotating state or a vibrating state.

[0024] In a possible implementation manner of the first aspect, when the rotating blade is in a tilted rotating state, the method further includes:

[0025] Acquire the temperature distribution parameters of the main bearing and determine the temperature abnormality area of ​​the main bearing according to the temperature distribution parameters of the main bearing;

[0026] When the temperature abnormality region of the main bearing overlaps with the overlap region or the distance between the center point of the temperature abnormality region of the main bearing and the center point of the overlap region is less than or equal to a set distance, it is determined that the rotating blade is in a tilted rotating state.

[0027] In a possible implementation manner of the first aspect, when the position of the overlapping area is not fixed or does not exist, the method further includes:

[0028] Obtaining speed values ​​and speed directions at multiple monitoring points on the rotating blade;

[0029] When the speed directions at multiple monitoring points are the same and the speed values ​​return to zero at the same time, it is determined that the rotating blade is in a normal rotating state; otherwise, it is determined that the rotating blade is in a vibrating state.

[0030] In a possible implementation manner of the first aspect, the method further includes dividing the plurality of monitoring points on the rotor blade into groups, wherein each group includes a plurality of monitoring points adjacent to each other in a sequential order;

[0031] If the speed directions of the monitoring points in each group are the same and the speed values ​​are reset to zero at the same time, or if the speed directions of the monitoring points in a group greater than or equal to a set ratio are the same and the speed values ​​are reset to zero at the same time, it is determined that the rotating blades are in a normal rotating state; otherwise, it is determined that the rotating blades are in a vibrating state.

[0032] In a second aspect, the present application provides a unit state analysis device based on a centralized control system, comprising:

[0033] A data acquisition unit, used for continuously acquiring bending deformation parameters of the rotating spindle;

[0034] A data processing unit is used to draw a vibration amplitude curve associated with the rotating blade according to the deformation parameter, each rotating blade has a vibration amplitude curve, the abscissa of the vibration amplitude curve is the circumferential position, and the ordinate of the vibration amplitude curve is the circumferential size change;

[0035] A comparison processing unit, used to compare the similarity of any two vibration amplitude curves and determine the overlapping position;

[0036] A first state determination unit, used to determine the state of the rotating blade according to the overlapping position, the state of the rotating blade including a normal rotating state, a tilted rotating state and a trembling state;

[0037] Wherein, when determining the state of the rotating blade, it also includes obtaining the temperature distribution parameters of the main bearing and the vibration parameters of the rotating blade.

[0038] In a third aspect, the present application provides a unit status analysis system based on a centralized control system, the system comprising:

[0039] one or more memories for storing instructions; and

[0040] One or more processors, used to call and run the instructions from the memory to execute the method as described in the first aspect and any possible implementation of the first aspect.

[0041] In a fourth aspect, the present application provides a computer-readable storage medium, the computer-readable storage medium comprising:

[0042] Program, when the program is executed by a processor, the method described in the first aspect and any possible implementation of the first aspect is executed.

[0043] In a fifth aspect, the present application provides a computer program product, comprising program instructions. When the program instructions are executed by a computing device, the method described in the first aspect and any possible implementation of the first aspect is executed.

[0044] In a sixth aspect, the present application provides a chip system, which includes a processor for implementing the functions involved in the above aspects, for example, generating, receiving, sending, or processing the data and / or information involved in the above methods.

[0045] The chip system may be composed of chips, or may include chips and other discrete devices.

[0046] In a possible design, the chip system also includes a memory, which is used to store necessary program instructions and data. The processor and the memory can be decoupled and respectively set on different devices, connected by wired or wireless means, or the processor and the memory can also be coupled on the same device. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 It is a schematic flowchart of the steps of a unit status analysis method provided in this application.

[0048] Figure 2 This is a schematic diagram of the working principle of a distance measuring sensor provided by this application.

[0049] Figure 3 This is a schematic diagram of the working principle of another distance measuring sensor provided by this application.

[0050] Figure 4 It is a schematic diagram of a vibration amplitude curve provided by the present application.

[0051] Figure 5 It is a schematic diagram of an amplitude change area provided in this application.

[0052] Figure 6 This is a schematic diagram of an overlapping area on a rotating spindle provided by the present application.

[0053] Figure 7 This is a schematic diagram of a non-fixed position of an overlapping area on a rotating spindle provided by the present application.

[0054] Figure 8This is a schematic diagram of a rotating main axis provided by the present application in which no overlapping area exists. DETAILED DESCRIPTION

[0055] The technical solution in this application is further described in detail below in conjunction with the accompanying drawings.

[0056] This application discloses a unit status analysis method based on a centralized control system. Figure 1 In some examples, the unit status analysis method based on the centralized control system disclosed in this application includes the following steps:

[0057] S101, continuously acquiring bending deformation parameters of the rotating spindle;

[0058] S102, drawing a vibration amplitude curve associated with the rotating blade according to the deformation parameter, each rotating blade has a vibration amplitude curve, the abscissa of the vibration amplitude curve is the circumferential position, and the ordinate of the vibration amplitude curve is the circumferential size change;

[0059] S103, comparing the similarity of any two vibration amplitude curves to determine the overlapping position;

[0060] S104, determining the state of the rotating blade according to the overlapping position, the state of the rotating blade including a normal rotating state, a tilted rotating state and a trembling state;

[0061] Wherein, when determining the state of the rotating blade, it also includes obtaining the temperature distribution parameters of the main bearing and the vibration parameters of the rotating blade.

[0062] In general, the unit status analysis method based on the centralized control system provided in this application needs to use the distance measuring sensors installed on the rotating main shaft of the new energy generator set to realize data acquisition. The number of distance measuring sensors is multiple and evenly arranged around the axis of the rotating main shaft, such as Figure 2 and Figure 3 As shown, each distance measuring sensor collects distance data at a certain frequency, so that the runout of the rotating main shaft in each direction can be obtained. These runouts are directly related to the state of the rotating blades. By analyzing the runouts, the state of the rotating blades can be understood to a certain extent.

[0063] Of course, you can also Figure 3 As shown, the distance measuring sensor is in a rotating state.

[0064] In step S101, the bending deformation parameters of the rotating shaft are first continuously obtained, and then in step S102, the vibration amplitude curve associated with the rotating blade is drawn according to the deformation parameters. Each rotating blade has a vibration amplitude curve. Generally, a new energy generator set has three rotating blades, so three vibration amplitude curves can be obtained here.

[0065] It should be understood that the bending deformation parameter of the rotating spindle is a numerical value, which can be used as a vertical coordinate. Then, with the help of the axial position (position label) of the ranging sensor, a set of discrete points can be obtained. By connecting these discrete points in sequence with a curve, the vibration amplitude curve can be obtained.

[0066] In simple terms, Figure 3 As shown, the horizontal axis of the vibration amplitude curve is the circumferential position, and the vertical axis of the vibration amplitude curve is the circumferential size change. Figure 4 It can be seen that there are two types of vibration amplitude curves: large-amplitude vibration and small-amplitude vibration, and the small-amplitude vibration relies on the large-amplitude vibration.

[0067] In step S103, the similarity of any two vibration amplitude curves is compared to determine the overlapping position, where the overlapping position refers to the two vibration amplitude curves involved in the comparison having similar characteristics at the overlapping position.

[0068] Finally, in step S104, the state of the rotating blade is determined according to the overlapping position. Here, the state of the rotating blade is divided into three types, namely normal rotation state, tilted rotation state and tremor state. The normal rotation state means that the rotating blade is in a normal state and no intervention is required.

[0069] The tilt rotation state and the vibration state indicate that the rotating blades are in an abnormal state and intervention measures are required. The general intervention measures include speed adjustment and steering adjustment. Speed ​​adjustment and steering adjustment can quickly change the relevant parameters of the rotating blades and play a role in suppressing the tilt rotation state and the vibration state.

[0070] Of course, when determining the state of the rotating blades, it also includes obtaining the temperature distribution parameters of the main bearing and the vibration parameters of the rotating blades for auxiliary judgment. The temperature distribution parameters of the main bearing are obtained by a contact temperature sensor or a non-contact temperature sensor installed at the main bearing, and the vibration parameters of the rotating blades are obtained by an optical fiber sensor installed inside the rotating blades.

[0071] Temperature sensors and optical fiber sensors are existing sensors of new energy generator sets and do not require additional installation.

[0072] In some examples, the method of comparing the similarity of any two vibration amplitude curves and determining the overlap position is:

[0073] S201, using a filter to filter and remove the vibration amplitude curve, filtering out the part of the vibration amplitude curve whose frequency is within the coverage range of the filter, to obtain a processed vibration amplitude curve;

[0074] S202, determining the amplitude variation region of two primary processing vibration amplitude curves;

[0075] S203, when there is an overlapped segment in the amplitude variation regions on the two primary processed vibration amplitude curves, the overlapped segment is recorded as an overlapping position.

[0076] In step S201, the vibration amplitude curve is first filtered and removed using a filter, and the part of the vibration amplitude curve whose frequency is within the coverage range of the filter is filtered out to obtain a processed vibration amplitude curve. The main function of the filter is to remove irrelevant frequency parts, and the irrelevant frequency parts here are mainly high-frequency parts. The range of the high-frequency part needs to be determined according to the specific parameters of each power plant and equipment, and is not limited here.

[0077] This is because the high frequency part is mainly generated by the rotor blades themselves, and has a low correlation with the moving trajectory of the rotor blades, so it needs to be filtered out when determining the overlap segment. However, it should be noted here that when the high frequency part frequently appears in the vibration amplitude curve, it means that the fan blades of the rotor blades are in an unstable state at this time, and active measures need to be taken to intervene to avoid damage to the rotor blades.

[0078] In step S202, the amplitude change regions of the two primary processed vibration amplitude curves are determined ( Figure 5 As shown), finally, when there is an overlapped segment in the amplitude change region on the two once-processed vibration amplitude curves, the overlapped segment is recorded as the overlapping position.

[0079] The amplitude change area indicates the change of the rotor blade at this location, and the overlapping position indicates that there are multiple rotor blades that have changes at this location at the same time.

[0080] The method for determining the amplitude change area of ​​two once-processed vibration amplitude curves is:

[0081] S301, transferring two once-processed vibration amplitude curves into the time domain and frequency domain for processing to obtain two vibration amplitude curve groups;

[0082] S302, respectively selecting curves from the two vibration amplitude curve groups to obtain a selected curve group, wherein the start time point difference and the end time point difference of the selected composite curve corresponding to the selected curve group are both within the allowable range;

[0083] S303, determining an amplitude change region according to the start time point and the end time point;

[0084] Therein, the amplitude of the selected synthetic curve tends to increase first and then tends to decrease.

[0085] In step S301 to step S303, two once-processed vibration amplitude curves are first transferred to the time domain and frequency domain for processing. At this time, the two vibration amplitude curve groups obtained have both time domain characteristics and frequency domain characteristics. The vibration amplitude curve group is composed of multiple sub-once-processed vibration amplitude curves, and each of the once-processed vibration amplitude curves has a start time and an end time.

[0086] Then, curves are selected from the two vibration amplitude curve groups to obtain a selected curve group, and the start time point difference and the end time point difference of the selected synthetic curve corresponding to the selected curve group are both within the allowable range. Here, the allowable range is generally set at 0.1-0.15 seconds. Of course, if the rotating speed of the rotating blade is high, the setting range needs to be narrowed, such as 0.1-0.12 seconds; if the rotating speed of the rotating blade is high, the setting range needs to be expanded, such as 0.1-0.18 seconds.

[0087] Finally, the amplitude change area is determined according to the starting time point and the ending time point. The specific method is to perform mean processing on the selected starting time point and the ending time point respectively. The mean starting time point and the mean ending time point obtained at this time are used as the starting time point and the ending time point of the amplitude change area.

[0088] The mean starting time point and the mean ending time point correspond to a starting position and an ending position respectively, and the starting position and the ending position are the starting position and the ending position of the amplitude change region.

[0089] The length of the overlapped segment may be equal to the length of the amplitude change region, or may be less than the length of the amplitude change region.

[0090] In addition, for the synthesized selected synthetic curve, it is required that the amplitude of the selected synthetic curve first tends to increase and then tends to decrease, and the increase amplitude and the decrease amplitude are not limited here.

[0091] The method for determining the state of the rotating blades based on the overlap area of ​​the overlapping positions is as follows:

[0092] When the position of the overlapped area is fixed, Figure 6 As shown, the rotating blades are in an inclined rotation state, which means that during multiple complete rotations (360°) of the rotating blades, the positions of the overlapping areas are fixed.

[0093] The position of the overlap area is not fixed ( Figure 7 shown) or does not exist ( Figure 8 As shown), the rotating blades are in a normal rotation state or a vibrating state, and the position of the overlapping area is not fixed, which means that the overlapping areas in two adjacent complete rotations (360°) of the rotating blades do not overlap.

[0094] When the rotor blade is in a tilted rotation state, the following steps are added for auxiliary determination:

[0095] Acquire the temperature distribution parameters of the main bearing and determine the temperature abnormality area of ​​the main bearing according to the temperature distribution parameters of the main bearing;

[0096] When the temperature abnormality region of the main bearing overlaps with the overlap region or the distance between the center point of the temperature abnormality region of the main bearing and the center point of the overlap region is less than or equal to a set distance, it is determined that the rotating blade is in a tilted rotating state.

[0097] The temperature distribution parameters of the main bearing represent the temperature distribution at various locations on the main bearing. When the rotating blades are in a tilted rotation state, the uneven local force will cause local abnormalities in the temperature distribution parameters of the main bearing.

[0098] When the temperature abnormality region of the main bearing overlaps with the overlap region or the distance between the center point of the temperature abnormality region of the main bearing and the center point of the overlap region is less than or equal to a set distance, it is determined that the rotating blade is in a tilted rotating state.

[0099] The general setting distance here is generally controlled at 1%-2% of the main bearing diameter.

[0100] When the position of the overlapping area is not fixed or does not exist, the following steps are added for auxiliary determination:

[0101] Obtaining speed values ​​and speed directions at multiple monitoring points on the rotating blade;

[0102] When the speed directions at multiple monitoring points are the same and the speed values ​​return to zero at the same time, it is determined that the rotating blade is in a normal rotating state; otherwise, it is determined that the rotating blade is in a vibrating state.

[0103] This method is determined by whether the speed direction and speed value return to zero at the same time. This is because if the speed directions at multiple monitoring points are the same and the speed values ​​return to zero at the same time, it means that the vibration on the rotating blade is in a relatively stable state. On the contrary, when the conditions that the speed directions at multiple monitoring points are the same and the speed values ​​return to zero at the same time are not met, it means that the vibration on the rotating blade is in an irregular state at this time, that is, the vibration at the monitoring point is affected by the surrounding environment at this time.

[0104] The flutter direction here is perpendicular to the plane of rotation of the rotor blade.

[0105] In some possible implementations, the method further includes dividing the plurality of monitoring points on the rotor blade into groups, wherein each group includes a plurality of monitoring points that are adjacent in a sequential order;

[0106] If the speed directions of the monitoring points in each group are the same and the speed values ​​are reset to zero at the same time, or if the speed directions of the monitoring points in a group greater than or equal to a set ratio are the same and the speed values ​​are reset to zero at the same time, it is determined that the rotating blades are in a normal rotating state; otherwise, it is determined that the rotating blades are in a vibrating state.

[0107] The present application also provides a unit status analysis device based on a centralized control system, comprising:

[0108] A data acquisition unit, used for continuously acquiring bending deformation parameters of the rotating spindle;

[0109] A data processing unit is used to draw a vibration amplitude curve associated with the rotating blade according to the deformation parameter, each rotating blade has a vibration amplitude curve, the abscissa of the vibration amplitude curve is the circumferential position, and the ordinate of the vibration amplitude curve is the circumferential size change;

[0110] A comparison processing unit, used to compare the similarity of any two vibration amplitude curves and determine the overlapping position;

[0111] A first state determination unit, used to determine the state of the rotating blade according to the overlapping position, the state of the rotating blade including a normal rotating state, a tilted rotating state and a trembling state;

[0112] Wherein, when determining the state of the rotating blade, it also includes obtaining the temperature distribution parameters of the main bearing and the vibration parameters of the rotating blade.

[0113] Furthermore, it also includes:

[0114] A filtering and removing unit, used to filter and remove the vibration amplitude curve using a filter, and to filter out the part of the vibration amplitude curve whose frequency is within the coverage range of the filter, so as to obtain a processed vibration amplitude curve;

[0115] A first determining unit, used to determine the amplitude variation region of two primary processed vibration amplitude curves;

[0116] The overlapping position determination unit is used to record the overlapping section as the overlapping position when there is an overlapping section in the amplitude change areas on the two once-processed vibration amplitude curves.

[0117] Furthermore, it also includes:

[0118] A first processing unit is used to transfer the two once-processed vibration amplitude curves into the time domain and the frequency domain for processing to obtain two vibration amplitude curve groups;

[0119] The curve selection unit is used to select curves from the two vibration amplitude curve groups to obtain a selected curve group, and the starting time point difference and the ending time point difference of the selected synthetic curve corresponding to the selected curve group are both within the allowable range;

[0120] An amplitude change region determining unit, used to determine the amplitude change region according to a starting time point and an ending time point;

[0121] Therein, the amplitude of the selected synthetic curve tends to increase first and then tends to decrease.

[0122] Further, when the position of the overlapped area is fixed, the rotating blade is in a tilted rotating state;

[0123] When the position of the overlapped area is not fixed or does not exist, the rotating blade is in a normal rotating state or a vibrating state.

[0124] Furthermore, it also includes:

[0125] A temperature parameter acquisition unit, used to acquire the temperature distribution parameters of the main bearing and determine the temperature abnormality area of ​​the main bearing according to the temperature distribution parameters of the main bearing;

[0126] The second state determination unit is used to determine that the rotating blade is in a tilted rotating state when the temperature abnormality area of ​​the main bearing overlaps with the overlap area or the distance between the center point of the temperature abnormality area of ​​the main bearing and the center point of the overlap area is less than or equal to a set distance.

[0127] Furthermore, it also includes:

[0128] A parameter acquisition unit, used to acquire speed values ​​and speed directions at multiple monitoring points on the rotating blade;

[0129] The third state determination unit is used to determine that the rotating blade is in a normal rotating state when the speed directions at the plurality of monitoring points are the same and the speed values ​​return to zero at the same time, and vice versa, determine that the rotating blade is in a vibrating state.

[0130] Furthermore, it also includes dividing the multiple monitoring points on the rotating blade into groups, each group includes multiple monitoring points that are adjacent in sequence;

[0131] If the speed directions of the monitoring points in each group are the same and the speed values ​​are reset to zero at the same time, or if the speed directions of the monitoring points in a group greater than or equal to a set ratio are the same and the speed values ​​are reset to zero at the same time, it is determined that the rotating blades are in a normal rotating state; otherwise, it is determined that the rotating blades are in a vibrating state.

[0132] In one example, the unit in any of the above devices can be one or more integrated circuits configured to implement the above methods, such as: one or more application specific integrated circuits (ASICs), or, one or more digital signal processors (DSPs), or, one or more field programmable gate arrays (FPGAs), or a combination of at least two of these integrated circuit forms.

[0133] For another example, when the units in the device can be implemented in the form of a processing element scheduling program, the processing element can be a general-purpose processor, such as a central processing unit (CPU) or other processor that can call a program. For another example, these units can be integrated together and implemented in the form of a system-on-a-chip (SOC).

[0134] Various objects such as various messages / information / equipment / network elements / systems / devices / actions / operations / processes / concepts that may appear in this application are named. It can be understood that these specific names do not constitute a limitation on the relevant objects. The names assigned may change with factors such as scenarios, contexts or usage habits. The understanding of the technical meaning of the technical terms in this application should be mainly determined from the functions and technical effects embodied / executed in the technical scheme.

[0135] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0136] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0137] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0138] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0139] It should also be understood that in various embodiments of the present application, the first, second, etc. are only used to indicate that multiple objects are different. For example, the first time window and the second time window are only used to indicate different time windows. They should not have any impact on the time window itself, and the first, second, etc. mentioned above should not impose any limitations on the embodiments of the present application.

[0140] It should also be understood that in the various embodiments of the present application, unless otherwise specified or there is a logical conflict, the terms and / or descriptions between different embodiments are consistent and can be referenced to each other, and the technical features in different embodiments can be combined to form new embodiments according to their internal logical relationships.

[0141] If the functions are implemented in the form of 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 the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a computer-readable storage medium, including several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present application. The aforementioned computer-readable storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0142] The present application also provides a unit status analysis system based on a centralized control system, the system comprising:

[0143] one or more memories for storing instructions; and

[0144] One or more processors are used to call and run the instructions from the memory to execute the method as described above.

[0145] The present application also provides a computer program product, which includes instructions. When the instructions are executed, the terminal device and the network device perform operations of the terminal device and the network device corresponding to the above method.

[0146] The present application also provides a chip system, which includes a processor for implementing the functions involved in the above content, such as generating, receiving, sending, or processing the data and / or information involved in the above method.

[0147] The chip system may be composed of chips, or may include chips and other discrete devices.

[0148] The processor mentioned in any of the above places can be a CPU, a microprocessor, an ASIC, or one or more integrated circuits for executing programs for controlling the above-mentioned feedback information transmission method.

[0149] In a possible design, the chip system also includes a memory, which is used to store necessary program instructions and data. The processor and the memory can be decoupled and respectively set on different devices, connected by wire or wireless means to support the chip system to implement various functions in the above embodiments. Alternatively, the processor and the memory can also be coupled on the same device.

[0150] Optionally, the computer instructions are stored in a memory.

[0151] Optionally, the memory is a storage unit within the chip, such as a register, a cache, etc. The memory can also be a storage unit within the terminal located outside the chip, such as a ROM or other types of static storage devices that can store static information and instructions, RAM, etc.

[0152] It can be understood that the memory in the present application can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories.

[0153] The non-volatile memory may be a ROM, a programmable ROM (PROM), an erasable PROM (EPROM), an electrically erasable PROM (EEPROM), or a flash memory.

[0154] The volatile memory may be a RAM, which is used as an external cache. There are many different types of RAM, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), and direct memory bus RAM.

[0155] The embodiments of this specific implementation method are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, all equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A unit status analysis method based on a centralized control system, characterized in that: include: Continuously obtain the bending deformation parameters of the rotating spindle; Draw a vibration amplitude curve associated with the rotating blade according to the deformation parameter, each rotating blade has a vibration amplitude curve, the abscissa of the vibration amplitude curve is the circumferential position, and the ordinate of the vibration amplitude curve is the circumferential size change; Compare the similarity of any two vibration amplitude curves to determine the overlapping position; Determine the state of the rotating blade according to the overlapping position, the state of the rotating blade including a normal rotating state, a tilted rotating state and a trembling state; Wherein, when determining the state of the rotating blade, it also includes obtaining the temperature distribution parameters of the main bearing and the vibration parameters of the rotating blade.

2. The unit status analysis method based on the centralized control system according to claim 1 is characterized in that: Comparing the similarity of any two vibration amplitude curves and determining the overlapping position includes: The vibration amplitude curve is filtered and removed using a filter, and the part of the vibration amplitude curve whose frequency is within the coverage range of the filter is filtered out to obtain a processed vibration amplitude curve; Determine the amplitude variation region of two primary processing vibration amplitude curves; When there is an overlapped segment in the amplitude change regions on the two primary processing vibration amplitude curves, the overlapped segment is recorded as the overlapping position.

3. The unit status analysis method based on the centralized control system according to claim 2 is characterized in that: Determine the amplitude change area of ​​the two primary processing vibration amplitude curves including: The two once processed vibration amplitude curves are transferred into the time domain and frequency domain for processing to obtain two vibration amplitude curve groups; Selecting curves from the two vibration amplitude curve groups respectively to obtain a selected curve group, wherein the difference between the starting time point and the ending time point of the selected composite curve corresponding to the selected curve group are both within the allowable range; Determine the amplitude change area according to the starting time point and the ending time point; Therein, the amplitude of the selected synthetic curve tends to increase first and then tends to decrease.

4. The unit status analysis method based on the centralized control system according to claim 2 is characterized in that: Determining the state of the rotating blade according to the overlap area of ​​the overlapping position includes: When the position of the overlapped area is fixed, the rotating blade is in a tilted rotating state; When the position of the overlapped area is not fixed or does not exist, the rotating blade is in a normal rotating state or a vibrating state.

5. The unit status analysis method based on the centralized control system according to claim 4 is characterized in that: When the rotating blade is in a tilted rotating state, it also includes: Acquire the temperature distribution parameters of the main bearing and determine the temperature abnormality area of ​​the main bearing according to the temperature distribution parameters of the main bearing; When the temperature abnormality region of the main bearing overlaps with the overlap region or the distance between the center point of the temperature abnormality region of the main bearing and the center point of the overlap region is less than or equal to a set distance, it is determined that the rotating blade is in a tilted rotating state.

6. The unit status analysis method based on the centralized control system according to claim 4 is characterized in that: When the position of the overlapped area is not fixed or does not exist, it also includes: Obtaining speed values ​​and speed directions at multiple monitoring points on the rotating blade; When the speed directions at multiple monitoring points are the same and the speed values ​​return to zero at the same time, it is determined that the rotating blade is in a normal rotating state; otherwise, it is determined that the rotating blade is in a vibrating state.

7. The unit status analysis method based on the centralized control system according to claim 6 is characterized in that: The method further includes dividing the plurality of monitoring points on the rotating blade into groups, wherein each group includes a plurality of monitoring points adjacent to each other in a sequential order; If the speed directions of the monitoring points in each group are the same and the speed values ​​are reset to zero at the same time, or if the speed directions of the monitoring points in a group greater than or equal to a set ratio are the same and the speed values ​​are reset to zero at the same time, it is determined that the rotating blades are in a normal rotating state; otherwise, it is determined that the rotating blades are in a vibrating state.

8. A unit status analysis device based on a centralized control system, characterized in that: include: A data acquisition unit, used for continuously acquiring bending deformation parameters of the rotating spindle; A data processing unit is used to draw a vibration amplitude curve associated with the rotating blade according to the deformation parameter, each rotating blade has a vibration amplitude curve, the abscissa of the vibration amplitude curve is the circumferential position, and the ordinate of the vibration amplitude curve is the circumferential size change; A comparison processing unit, used to compare the similarity of any two vibration amplitude curves and determine the overlapping position; A first state determination unit, used to determine the state of the rotating blade according to the overlapping position, the state of the rotating blade including a normal rotating state, a tilted rotating state and a trembling state; Wherein, when determining the state of the rotating blade, it also includes obtaining the temperature distribution parameters of the main bearing and the vibration parameters of the rotating blade.

9. A unit status analysis system based on a centralized control system, characterized in that: The system comprises: one or more memories for storing instructions; and One or more processors, configured to call and execute the instructions from the memory to perform the method according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: The computer readable storage medium comprises: The program, when the program is executed by a processor, the method according to any one of claims 1 to 7 is executed.

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