CN113126571B - Electric transmission device health diagnosis system, method and central control device - Google Patents
Electric transmission device health diagnosis system, method and central control device Download PDFInfo
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
- G05B19/4183—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by data acquisition, e.g. workpiece identification
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
- G05B19/4185—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by the network communication
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
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Abstract
The invention aims to provide a health diagnosis system and method of an electric transmission device and a central control device. An electric power transmission device health diagnosis system for performing health diagnosis and fault monitoring on a plurality of electric power transmission devices controlling a plurality of loads, comprising: a plurality of electric drives; and a central control device that communicates with the plurality of electric power transmission devices via a bus, the central control device having: an information collection unit that collects operation information indicating an operation condition of each electric power transmission device from the electric power transmission devices; an information analysis unit that analyzes the operation information collected by the information collection unit and generates health information indicating the health degree of each electric power transmission device; and a display unit that visually displays the health information.
Description
Technical Field
The present invention relates to an electric drive health diagnosis system for health diagnosis and fault monitoring of an electric drive, a method thereof, and a central control device in the system.
Background
The electric transmission device is widely applied to almost all industrial fields, such as metallurgy, electric power, petroleum and natural gas, mining industry, cement and the like, drives and controls various loads such as a lifter, a fan, a pump and the like, can realize rapid acceleration and deceleration operation, saves energy, reduces electric charge cost and requirements on a power supply, improves the degree of automation, prolongs the service life of equipment and the like.
Disclosure of Invention
Problems to be solved by the invention
The electric drive device ensures the stable operation of various loads such as a lifting machine, a fan, a pump and the like, but the electric drive device can also malfunction in operation, and in actual operation, the automatic health diagnosis and fault monitoring technology aiming at the electric drive device is required. Particularly in large systems controlled by multiple electric drives (e.g., high voltage inverters), there is no suitable centralized health diagnosis and fault monitoring technique for multiple electric drives. In addition, in recent years, with further development of the complexity of the microprocessor-based electronic system, the possibility of occurrence of unexpected faults in the above-mentioned large-scale system has become high. Therefore, it is more necessary to monitor each electric power transmission device, and prompt the user in time when it is predicted that the information such as the device life cycle, device alarm, failure and the like is about to be reached.
Means for solving the problems
It is therefore an object of the present invention to provide a health diagnosis system that can perform health diagnosis and failure monitoring of an electric power transmission device, particularly in a large-scale system that is controlled by a plurality of electric power transmission devices.
According to one aspect of the present invention, there is provided an electric power transmission device health diagnosis system for health diagnosis and fault monitoring of a plurality of electric power transmission devices controlling a plurality of loads, comprising: the plurality of electric drives; and a central control device in communication with the plurality of electric power transmission devices via a bus, the central control device having: an information collection unit that collects operation information indicating an operation condition of each of the electric power transmission devices from the electric power transmission devices; an information analysis unit that analyzes the operation information collected by the information collection unit and generates health information indicating a health degree of each of the electric power transmission devices; and a display unit that visually displays the health information.
Further, according to an aspect of the present invention, there is provided an electric power transmission device health diagnosis system for performing health diagnosis and fault monitoring of a plurality of electric power transmission devices controlling a plurality of loads, the electric power transmission device health diagnosis system including: the plurality of electric drives; and the central control device communicating with the plurality of electric power transmission devices through a bus, the central control device having: an information collection unit that collects operation information indicating an operation condition of each of the electric power transmission devices from the electric power transmission devices; an information analysis unit that analyzes the operation information collected by the information collection unit and generates health information indicating a health degree of each of the electric power transmission devices; and a display unit that visually displays the health information.
According to another aspect of the present invention, there is provided an electric power transmission device health diagnosis method for performing health diagnosis and fault monitoring of a plurality of electric power transmission devices controlling a plurality of loads, the electric power transmission device health diagnosis system including: the plurality of electric drives; and a central control device that communicates with the plurality of electric power transmission devices via a bus, the electric power transmission device health diagnosis method including the steps of: an information collection step in which the central control device collects operation information indicating an operation condition of each of the electric power transmission devices; an information analysis step of analyzing the operation information collected by the information collection step by the central control device and generating health information indicating the health degree of each of the electric power transmission devices; and a display step in which the central control device visually displays the health information.
According to the invention, in a large system controlled by a plurality of electric drives, the health information of each electric drive and each part in each electric drive can be obtained more accurately, the health diagnosis and fault monitoring can be carried out, and the decision of replacing spare parts can be made scientifically.
Drawings
FIG. 1 is a functional block diagram schematically illustrating an electric drive health diagnostic system of the present invention.
Fig. 2 is a diagram schematically showing an example of a curve as a transient failure probability function of the life cycle model of the present invention.
Fig. 3 is a block diagram schematically showing the structure of the electric power transmission health diagnosis system of the embodiment.
Fig. 4 is a diagram schematically showing an example of a main screen displayed on the display unit according to the embodiment.
Fig. 5A to 5D are diagrams schematically showing examples of sub-screens displayed on the display unit according to the embodiment.
Fig. 6A to 6B are diagrams schematically showing examples of details of health information of each electric power transmission device displayed on the display unit according to the embodiment.
Fig. 7 is a diagram schematically showing an example of a spare part management screen displayed on the display unit according to the embodiment.
Detailed Description
Hereinafter, a health diagnosis system according to an embodiment will be described with reference to the drawings. In the following description, the same reference numerals are given to structures having the same or similar functions. In addition, a repetitive description of these structures may be omitted.
(Embodiment)
A health diagnosis system 1 according to an embodiment will be described with reference to fig. 1. FIG. 1 is a functional block diagram schematically illustrating an electric drive health diagnostic system of the present invention. The health diagnosis system 1 of the present embodiment is, for example, a system for performing health diagnosis and fault monitoring on a plurality of electric power transmission devices 4 that control a plurality of loads 5. Comprising the following steps: a master station 2, a plurality of power actuators 4, a bus 3, wherein the master station 2 communicates with the plurality of power actuators 4 via the bus 3.
Further, the master station 2 has the following components: an information collection unit 21, an information analysis unit 22, and a display unit 23.
The information collection unit 21 collects operation information (specifically described later) indicating the operation condition of each electric power transmission device 4.
The information analysis unit 22 analyzes the operation information collected by the information collection unit 21 and generates health information indicating the degree of health, wherein the degree of health may be a binary value such as "normal" or "failed", or may be an absolute value or a percentage of the remaining life of the device calculated from life data indicating the expected operation time and data indicating the operation time, which are predetermined in advance of the device. In addition, the health degree may be expressed by the elapsed life (life-remaining life) in addition to the remaining life. The operating time may be not only absolute time, but also information related to the operating time, such as the number of operations of the device, for example, the number of times the device is turned on when the device is turned off, for example.
The display unit 23 visually displays the generated health information. The user can understand the use condition and the remaining life of the electric power transmission device by visually displaying the health information on the display unit 23 to perform corresponding coping processes. The display unit 23 may also display information such as replacement prompts for the respective electric power components provided in the electric power transmission device 4 (described later) to the user. The display unit 23 may also display the specific location of the occurrence of the fault, the degree of the fault, the type of the fault, etc. at the time of the fault. The display with respect to the display unit will be described in detail later.
The operation information is specifically described below.
The operation information indicates an operation condition of the electric power transmission device 4, and may include at least the following information, for example: the operation time of the electric power transmission device 4, the number of times of switching of electric power components such as high-voltage switches provided in the electric power transmission device 4, and the number of times and/or time when a key operation parameter of the electric power transmission device 4 exceeds a prescribed threshold.
The switching times of the high-voltage switch can be, for example, the switching times of a vacuum circuit breaker, when the electric transmission device 4 is a high-voltage switch cabinet, the high-voltage switch cabinet and the master station communicate through a bus, switching signals of the vacuum circuit breaker in the high-voltage switch cabinet are transmitted to the master station, and the master station acquires the switching times from the received switching signals through conversion and calculation. Since the vacuum circuit breaker is likely to fail due to the accumulation of the number of times of closing the vacuum circuit breaker, it is possible to obtain health information indicating the health of the power transmission device 4 (the high-voltage switch provided in the power transmission device 4) by analyzing the number of times of opening and closing the high-voltage switch as the power component provided in the power transmission device 4.
The above-mentioned critical operating parameter of the electric drive 4 may be, for example, its operating current, its operating temperature or the temperature of its cooling system.
The power transmission device 4 may transmit an operation current signal to the master station, and the master station obtains information that the operation current exceeds a threshold value, that is, current overload, from the received current signal, where the information of the current overload may be, for example, the cumulative number of times of overload or the frequency of overload. As the number of times of current overload is accumulated or frequent overload occurs, the electric power transmission device will approach its use limit and be more likely to malfunction, so that by analyzing the operation information as the number of times of current overload or the frequency of overload of the electric power transmission device 4, health information indicating the degree of health can be obtained. The information of the current overload may of course be an accumulated time of the current overload of the electric actuator 4 or the like.
Likewise, the electric drive 4 may transmit a temperature signal indicative of its operating temperature or its cooling system temperature to the master station, which obtains from the temperature signal information of a temperature overload of the electric drive 4, the operating temperature or its cooling system temperature exceeding a prescribed threshold value, for example 38 ℃, which may also include the cumulative number of times, the cumulative time, the overload frequency, or the like. With the accumulation of the number of times or the total time of the temperature overload of the operating temperature or the cooling system or the occurrence of frequent overload, the electric power transmission device 4 will be more likely to fail, so that by analyzing the operation information as the number of times and/or time of the temperature overload or the frequency of overload of the operating temperature or the cooling system of the electric power transmission device 4, the health information indicating the degree of health can be obtained.
In addition, the operation information may further include: operating state information indicating which of the operating, warning, and fault states the electric drive 4 is in, and a fault code indicating the type of fault when the electric drive 4 is in the fault state. The master station 2, after acquiring the information, can display the information directly on the screen of the display unit 23. Thus, the user can learn the specific location of the occurrence of the fault, the degree of the fault, the type of the fault, etc. from the display unit when the fault occurs.
The operation of the information analysis unit 22 is described in detail below.
The information analysis unit 22 may obtain the remaining life by subtracting the elapsed life from the expected life of the electric power transmission device when analyzing the collected operation information and generating the health information indicating the health degree, for example, may obtain the time or the number of times (which may be an absolute value or a percentage as described above, etc.) indicating the remaining life by subtracting the calculation of the number of times of switching on, the number of times of overload of the current/temperature in the operation information from the expected total number of times of switching on of the vacuum circuit breaker, the number of times of overload of the electric power transmission device 4, the time, etc. In addition, the information analysis unit 22 of the present invention may also build a life cycle model of the electric drive 4 based on the operation information and generate health information from the life cycle model.
Specifically, as a specific example of the life cycle model, for example, an instantaneous failure probability function can be cited. The instantaneous failure probability refers to the probability that a product that has not failed until a certain time is operated, and that failure occurs within a unit time after the certain time. The transient failure probability function is a function of the transient failure probability with respect to time t.
Fig. 2 is a diagram schematically showing an example of an instantaneous failure probability function curve as a life cycle model of the present invention.
The instantaneous failure probability function of the product is not a simple linear increasing function (dot-dash line in fig. 2) in the first place, that is, the instantaneous failure probability does not increase monotonically and gradually with the passage of the operation time. As proposed by the weibull life distribution, the realistic product transient failure probability function curve may be a concave bathtub-type curve as shown by the thin solid line in fig. 2, and the standard transient failure probability curve conforming to the weibull distribution comprises the following three phases:
The first stage: early failure period (decrementing period), transient failure probability is a decreasing function of time. Early failure rates were high at the beginning of product use due to design and manufacturing defects. As the run time increases, the failure rate begins to decrease.
And a second stage: the probability of transient failure approaches a constant value for the occasional failure period (constant period). After an early failure period, the product should ideally be "failure free" before substantial wear or aging (third stage) occurs. But there is still accidental failure of the product due to accidental change of environment, artificial accidental error in operation or improper management, etc. The occasional failure rate of the product is randomly distributed, very low and substantially constant.
And a third stage: wear out failure period (incremental period), the instantaneous failure probability is an increasing function of time. After the second stage, the device has reached the end of life, and failure rates begin to increase dramatically due to aging, etc., which marks that the product has entered "senior" and that the failure is called wear failure. If necessary preventative maintenance is performed before entering the wear failure period, the failure rate may remain near the occasional failure rate, thereby extending the occasional failure period (second stage) of the product.
In addition to the instantaneous failure probability being examined based on the operation time, the corresponding change in instantaneous failure probability may be examined based on other operation information such as the number of times the power switching element provided in the power transmission device is turned on and off, or the number of times and/or time the operation parameter of the power transmission device exceeds a predetermined threshold. Thus, according to the invention, the instantaneous failure probability function may be a function of other operating information, such as the number of switches, in addition to the function of time t.
Ideally the instantaneous failure probability curves for the same product should be the same and may be referred to as the standard instantaneous failure probability curve for that product (thin solid line in fig. 2). However, in practical situations, even with the same electric power transmission device, the actual failure rate of each electric power transmission device 4 is related to a specific working condition, for example, it is affected by parameters such as temperature and humidity of the working environment, frequency of a specific current or temperature overload caused by a specific working condition, etc., so the actual transient failure probability curve of each electric power transmission device in consideration of a specific working condition is not a standard transient failure probability curve, but is different from the standard transient failure probability curve in detail as shown by a bold line in fig. 2.
Furthermore, more importantly, in a system comprising a plurality of electric actuators 4, the operating conditions of the individual electric actuators are similar, and thus the respective life cycle models (instantaneous failure probability functions) have a great similarity to each other. Thus, according to the present invention, when the health information of any one of the plurality of electric power transmission devices indicates that the electric power transmission device 4 has failed, the information analysis unit 22 may use the operation information of the failed electric power transmission device 4, such as the switching-on times, the overload times/time of the current/temperature, the frequency of the current or temperature overload, the temperature and humidity, and other operation environment parameters in the operation information of the electric power transmission device 4, for the establishment of the life cycle model (such as the transient failure probability function) of the other electric power transmission device 4, for example, may correct the failure probability in the standard transient failure probability function according to the actual operation time when the failure occurs, so as to obtain the actual transient failure probability curve for the other electric power transmission device 4, and further obtain more accurate health information for the other electric power transmission device.
When the instantaneous failure probability is adopted as the life cycle model, the health information obtained according to the instantaneous failure probability can be the instantaneous failure probability (namely the possibility of failure), and can also contain the information of which of the three stages is positioned on the instantaneous failure probability curve, so that a user can make a decision as a spare part, and the like. In addition, the invention can also improve the use environment according to the obtained relation between the instantaneous failure probability and the actual operation information, for example, the actual operation information of the product when frequent failures occur in the second stage with low instantaneous failure probability or conversely the actual operation information when failures occur abnormally little in the first or third stage with high instantaneous failure probability can be recorded, and the recorded operation information is not preferable or is preferable as health information to prompt the user. The invention can also prompt the relation between the running information and the transition of the product in each stage of the instantaneous failure probability curve to the user as health information, so that the user can know the running information of the second stage, for example, the product can run on the instantaneous failure probability curve for as long as possible, thereby improving the operating environment in a targeted way and improving the reliability of the electric transmission device and even the whole system.
The transient failure probability curve may be stored in a memory provided in the information analysis unit 22 in the form of, for example, a lookup table, the abscissa of which is operation information such as operation time, and the ordinate is failure probability. In this way, according to the corresponding relation between the coordinates in the lookup table, analysis can be performed according to the running information such as the running time and the like, and the health information representing the health degree can be generated. The look-up table may of course also be stored in a memory external to the information analysis unit 22.
In addition, the life cycle model (transient failure probability function) may be established not only for the life cycle model (transient failure probability function) of the electric power transmission device itself but also for each electric power component provided in the electric power transmission device, for example, a vacuum circuit breaker or the like. The information analysis unit 22 may generate health information of each power component such as a vacuum circuit breaker based on a life cycle model (instantaneous failure probability function), and the display unit 23 may display a use condition of each power component such as a vacuum circuit breaker based on the life cycle model (instantaneous failure probability function) and perform replacement prompt when the life expectancy is reached.
The life cycle model of the present invention is described above by taking the transient failure probability function conforming to the weibull distribution as an example, but the present invention is not limited thereto. For example, the transient failure probability function may be a distribution other than the weibull distribution, or may be a life cycle model other than the transient failure probability function, and any model that can reflect a change in different stages such as initiation, maturation, and degradation as the life of the product or the failure rate progresses with the operation time may be applied to the present invention, and will not be described here.
In this way, the information analysis unit establishes the life cycle model of the electric transmission device based on the operation information and generates the health information according to the life cycle model, and according to the invention, the health information of each electric transmission device and each component in each electric transmission device can be more accurately obtained in a large-scale system controlled by a plurality of electric transmission devices, the health diagnosis and the fault monitoring can be carried out, and the decision of replacing spare parts can be scientifically made.
Embodiments of the present invention will be described specifically below with reference to fig. 3 to 7, taking a health management system including four electric power transmission devices as an example.
Fig. 3 is a block diagram schematically showing the structure of the electric power transmission health diagnosis system of the embodiment.
As shown in fig. 3, the power transmission device health diagnosis system of the embodiment has four identical units 30-1 to 30-4, each unit includes two primary fans (named primary fan 1 and primary fan 2, respectively), two secondary fans (named secondary fan 1 and secondary fan 2, respectively), two induced fans (named induced fan 1 and induced fan 2, respectively), and a water supply pump for 7 loads (not shown in the figure), each load is provided with a corresponding power transmission device 41-1 to 41-7, 42-1 to 42-7, 43-1 to 43-7, 44-1 to 44-7, and as an example, the power transmission device of each load is shown in fig. 3 to be composed of three power components of a high-voltage inverter, a high-voltage switch cabinet, and an air-water cooling device. These structures and numbers are examples only, and an actual system may contain different kinds and numbers of loads and electric drives.
Fig. 4 is a diagram schematically showing an example of a main screen displayed on the display unit 23 according to this embodiment. The main screen MS includes sub-screen parts SSP-1 to SSP-4 indicating health states of the respective power transmission devices 41-1 to 41-7, 42-1 to 42-7, 43-1 to 43-7, 44-1 to 44-7, and only health states of a high voltage inverter (shown as a primary air fan No. 1 inverter, a primary air fan No. 2 inverter, a secondary air fan No. 1 inverter … …) and an empty water cooling device (shown as a primary air fan No. 1 empty water cooling, a primary air fan No. 2 empty water cooling, and a secondary air fan No. 1 empty water cooling … …) in each of the 4 power transmission devices included in the system are exemplified herein. The health status may be indicated by colors and/or text, for example, a status of health in green and "healthy", a status of failure in red and "failure", a status of failure near a failure such as a failure rate approaching a preset threshold, etc., may be indicated by yellow and "alarm" and/or flashing. The sub-picture components can also display the health status of the high-voltage switch cabinets in the electric driving devices, and can be changed according to the needs.
The main screen MS further includes a plurality of functional units FB, and by pressing or clicking the functional units FB, different functions can be respectively realized, for example, here, 8 functional units FB1 to FB8 are exemplified, which are respectively "buzzer automatic test", "buzzer off", "No. 1 unit monitoring", "No. 2 unit monitoring", "No. 3 unit monitoring", "No. 4 unit monitoring", "spare part 1 list", and spare part 2 list ". The functional block FB1 "buzzer automatic mode" indicates that the buzzer is in automatic mode. The functional block FB2 "buzzer off" indicates that the buzzer is not in use. The functional components FB3 'No. 1 unit monitoring' to FB6 'No. 4 unit monitoring' are respectively used for calling and displaying the sub-pictures SS-1 to SS-4, and turning on the sub-pictures of the monitoring of each unit shown in fig. 5A to 5D. The "spare parts list 1" and "spare parts list 2" are used for managing the spare parts 1 and 2, respectively, and the spare parts management screen shown in fig. 7 is opened.
The number and function of the above-described functional components are only examples, and the present invention may of course have more functional components or different functional components.
Fig. 5A to 5D are diagrams schematically showing examples of the sub-screens SS-1 to SS-4 displayed on the display unit 23 according to the embodiment, and are displayed after the functional blocks FB3 "No. 1 group monitor" to FB6 "No. 4 group monitor" are pressed down on the main screen MS.
The following describes a specific case of the sub-screen SS-1 shown in fig. 5A as an example of the sub-screen. Hereinafter, when the sub-frames SS-1 to SS-4 are not distinguished, they are collectively referred to as sub-frames SS.
As shown in fig. 5A, the sub-screen SS visually displays the network connection status and health information of 7 power transmission devices and the respective power components included therein in one of the units (herein, "unit 1").
As described above, each of the 7 electric power drives in each of the units includes the high-voltage inverter, the high-voltage switchgear and the air-water cooling system, and thus the communication conditions between the high-voltage inverter (shown as "inverter"), the high-voltage switchgear (shown as "high-voltage switch") and the air-water cooling system (shown as "air-water cooling") of each electric power drive in one unit and the master station are shown, respectively. It should be noted that in this embodiment, it is shown that one communication is formed between the electric drives of the primary fan and the secondary fan and the main station, another communication is formed between the electric drive of the induced draft fan and the main station, and another communication is formed between the water feed pump and the main station, but such network connection is merely selected according to, for example, the arrangement of the load and the corresponding electric drive, and each electric drive is only required to be directly or indirectly connected to the main station through a bus.
As shown in fig. 5A, the sprite visually shows the connection status and health information between each power transmission device and each power component thereof in the "master station" and the high-voltage inverter. The health status of each electric drive device can be displayed by color, flashing and the like, and for example, green can be used for indicating normal, red for indicating abnormal communication or component failure, yellow for indicating alarm and the like.
The sub-screen images shown in fig. 5A to 5D have a function of displaying detailed health information of each power transmission device or power components included in the power transmission device by clicking an icon call, in addition to the health information of the power transmission device and the power components thereof.
Fig. 6A to 6B are diagrams schematically showing examples of details of health information of power components of each power transmission device displayed on the display unit 23 according to the embodiment. Fig. 6A shows details of health information of the inverter in the electric power transmission device, and fig. 6B shows details of health information of the air-water cooling system in the electric power transmission device. The "inverter" icon ("inverter No. 1" of the secondary fan, "inverter No. 1 of the primary fan," "inverter No. 2 of the secondary fan," "inverter No. 1 of the induced fan," "inverter No. 2 of the induced fan," "inverter of the feed pump") as the electric power component of the electric power transmission device is clicked in the sub-screen SS shown in fig. 5A to 5D, and then the "SSs-1" of the inverter shown in fig. 6A is displayed, respectively, wherein the "x" is "secondary fan No. 1," "secondary fan No. 2," "primary fan No. 1," "primary fan No. 2," "primary fan No. 1," "No. 2 of the induced fan," and "No. 1 of the induced fan," and "No. 2 of the induced fan," and "water-feeding pump" are respectively, and also the "air-cooled" icon "of the" air-cooled "of the secondary fan No. 1 of the electric power component (" air-cooled "of the secondary fan No. 2 of the secondary fan," "air-cooled" No. 1 of the primary fan, "air-cooled" of the primary fan No. 2 of the primary fan No. air-cooled "," air-cooled "of the induced fan No. 2 of the air fan," and "No. 1 of the fan," and "No. 2 of the induced fan" shown in the sub-screen SS are clicked in the sub-screen.
As shown in fig. 6A and 6B, the inverter health screen SSS-1 and the empty water cooling health screen SSS-2 visually display detailed health information of each of the high-voltage inverter and the empty water cooling system of the electric power transmission device.
As shown in fig. 6A, the inverter health screen SSS-1 includes two parts, and the left side is health information of the high-voltage inverter of the electric transmission device, including: working state information indicating which state the frequency converter is in operation, alarming and fault; a fault code indicating a type of the fault when the frequency converter is in a fault state; information indicating the number of times and/or time that the operating parameter of the frequency converter exceeds a prescribed threshold; and the instantaneous failure probability and the failure stage of the frequency converter. Also, as shown in fig. 6B, the empty water cooling health screen SSS-2 also includes two parts, and the left side is health information of the empty water cooling system of the electric power transmission device, including: working state information for indicating which state the air-water cooling system is in operation or failure; a fault code indicating a type of the fault when the empty water cooling system is in a fault state; information indicating the number of times and/or time that the operation parameter of the air-water cooling system exceeds a prescribed threshold; and the instantaneous failure probability and the failure stage of the air-water cooling system. Here, as the operation parameters and their threshold values, an example in which the current and threshold values are 150% of the overload is shown in fig. 6A, and an example in which the temperature and threshold values are 38 ℃ is shown in fig. 6B, but these are only examples, the operation parameters of the present invention may include at least the operation current, the temperature of the electric power transmission device, and those skilled in the art may set more operation parameters according to the specific situation of the device. The predetermined threshold value of the operation parameter may be a threshold value other than the specific number, and may be selected according to actual conditions.
The lower and right sides of the inverter health screen SSS-1 and the air-water cooling health screen SSS-2 show health information of each spare part provided in the power component.
Here, the health information of the spare parts "vacuum circuit breaker", "cartridge" and "screw" provided in the inverter as the electric power components is shown as an example, and includes parameters related to the life of the components such as "the number of times of switching on the vacuum circuit breaker" (the example in which the inverter is provided with three vacuum circuit breakers QF1 to QF3 is shown in the drawing), "the number of days of maintenance of the cartridge" and "the number of days of fastening the screw", and further may include "actual value", "correction value", "alarm value" of each parameter (when the spare part is an electric spare part), or "recommended value", "design value", "actual value" of each parameter (when the spare part is other than the electric spare part).
The "health information of each spare part included in the electric power component" may include health information related to daily maintenance operations of one or some spare parts in the electric power component, which may affect maintenance operations of the electric power component and thus the life of the electric power transmission device, in addition to health information related to the life of the "spare part" in the entity, and for example, health information of dust purge maintenance, which is one of daily maintenance operations of the inverter and the empty water cooling system, including "recommended value", "design value" and "actual value" is shown in fig. 6A and 6B, respectively.
In summary, the present invention may generate and display health information indicating the health of each component in the electric power transmission device based on the collected operation information of the operation condition of each component (the electric power component may be the spare part provided in the electric power component) in addition to the collected operation information of the electric power transmission device by analyzing the collected operation information of the electric power transmission device. In this case, the information analysis unit of the present invention can also build a life cycle model of each component based on the operation information of each component, and generate health information of each component based on the life cycle model of each component. The display unit visually displays health information of each component.
In addition, in addition to displaying health information, icons "alarm" displaying alarm states by color or flashing or the like when the spare part has arrived or fails, and buttons "reset" providing a parameter reset function after replacement of the spare part may be included in the inverter health screen SSS-1 and the empty water-cooling health screen SSS-2.
The inverter health screen SSS-1 and the air-water cooling health screen SSS-2 may also be provided with a replacement instruction for each power component or spare parts in each power component, to instruct the user that the life of the power component (or spare parts) has reached the end of the life, and the replacement instruction may be provided in various known manners such as a screen instruction and an audio instruction. After the user has performed the replacement, the health information of the relevant power component (or spare part) may be reset by clicking the "reset" button described above to resume health monitoring of the new power component (spare part). The resetting may of course also be performed automatically, for example by detecting replacement of the power component (or spare part) by a sensor or the like, automatically resetting its health information, and displaying it to the user in a health screen.
The display unit may display content related to the management function of the component in addition to the display of the component replacement prompt.
Fig. 7 is a diagram schematically showing an example of the spare part management screen displayed on the display unit 23 according to the embodiment.
Spare part management may be displayed in the form of a table. For example, fig. 7 shows a correspondence table of the name (spare part name), model number, specification, storage location, time required for the predicted replacement, number, and cumulative number of replacement times of each spare part.
The names, the models, the specifications and the storage positions of the spare parts can be manually input by a user, and also can be automatically input by a two-dimensional code and an automatic reading mode of a scanner.
The expected replacement time is an inherent value of each component, and can be stored in a memory, such as a memory of a master station, in a lookup table, and automatically acquired after the spare part name, model and specification are determined.
The user can more reasonably make a replacement operation plan and the like through the predicted replacement time, and unnecessary shutdown is avoided.
In addition to displaying the preset predicted replacement required time, the spare part management screen may display content related to the actual replacement time. The actual replacement time of each spare part is recorded manually or automatically, and the actual replacement time is displayed independently or used for dynamically updating the time required by the predicted replacement, so that the information required by the replacement is more accurately prompted to a user.
These functions related to spare part management can be realized by a spare part management device provided in the master station. The spare part management device manages spare part information including the model, specification, storage position, number and the like of spare parts. When spare parts are replaced, the spare parts management device can also record the time required by replacement, record the accumulated number of times of replacement and provide a time reference for the next replacement. In addition, by accumulating the number of replacement times, a more scientific quantity reference can be provided for the management of spare parts.
Although an example of the spare part management screen is shown in fig. 7, it is obvious that the related spare part management function may be used to manage electric power components such as a frequency converter, a high-voltage switchgear, and an air-water cooling system, and the management of the electric power components is the same as that of the spare part management except for the object of the management, and therefore, a detailed description of the management of the electric power components is omitted here.
Therefore, the electric power transmission device health diagnosis system according to the present embodiment performs health diagnosis and fault monitoring of a plurality of electric power transmission devices that control a plurality of loads, and includes: the plurality of electric drives; and a central control device in communication with the plurality of electric power transmission devices via a bus, the central control device having: an information collection unit that collects operation information indicating an operation condition of each of the electric power transmission devices from the electric power transmission devices; an information analysis unit that analyzes the operation information collected by the information collection unit and generates health information indicating a health degree of each of the electric power transmission devices; and a display unit that visually displays the health information.
According to this configuration, in a large-scale system in which a plurality of electric power transmission devices are controlled in a centralized manner, the operation information of each electric power transmission device is collected and analyzed by the central control device, and thereby health information indicating the health degree of each electric power transmission device is generated and displayed in a visual manner, so that centralized health diagnosis and trouble monitoring can be performed for the plurality of electric power transmission devices.
In addition, the information analysis unit of the invention establishes a life cycle model of the electric drive device based on the operation information, and generates health information according to the life cycle model.
Wherein, the operation information at least comprises: the run time of the electric drive; the number of times of switching of the power switching member provided in the power transmission device; times and/or times when the operating parameters of the electric drive exceed the prescribed threshold.
In addition, the present invention is characterized in that, when the health information of any one of the plurality of electric power transmission devices indicates that the electric power transmission device has failed, the information analysis unit uses the operation information of the failed electric power transmission device for establishment of the life cycle model of the other electric power transmission device.
Thus, the invention can use the operation information of the electric drive device which has been determined to be faulty for the establishment of life cycle models of other electric drive devices which are still in a healthy state, and further correct, for example, the transient failure probability curve of the other electric drive devices to generate more proper health information.
The information collection means also collects operation information indicating the operation conditions of the respective components provided in the electric power transmission device; the information analysis unit also establishes a life cycle model of each component based on the operation information of each component, and generates health information of each component according to the life cycle model of each component; the display unit also displays health information of each component in a visual mode and prompts replacement of each component.
In this way, in a large-scale system in which a plurality of electric power transmission devices are centrally controlled, not only health diagnosis and failure monitoring are performed in units of electric power transmission devices, but also health diagnosis and failure monitoring and component replacement prompting are further performed in units of individual components provided in the electric power transmission devices, thereby performing finer health diagnosis and failure monitoring.
In addition, the operation information of the electric power transmission device according to the present invention further includes: operating state information indicating which state the electric power transmission device is in operation, alarm, failure; and a fault code indicating a type of the fault when the electric drive is in a fault state. The operating parameters include at least the operating current, temperature of the electric drive.
According to this structure, the present invention can improve the reliability and the fineness of the health management and the fault diagnosis.
In the embodiment shown, the display unit 23 is part of the master station 2 (central control device), but the display unit 23 of the present invention may of course be a display device independent of the central control device.
All or a part of the information collecting means and the information analyzing means included in the central control device may be a software function section implemented by executing a computer program (software) stored in a memory (not shown) by a hardware processor such as CPU (Central Processing Unit), may be implemented by hardware (including a circuit section) such as LSI(Large Scale Integration)、ASIC(Application Specific Integrated Circuit)、PLD(Programmable Logic Device) or FPGA (Field-Programmable GATE ARRAY), or may be implemented by cooperation of the software function section and the hardware.
Claims (12)
1. A health diagnosis system for electric drive unit is disclosed, which can perform health diagnosis and fault monitoring on electric drive units for controlling multiple loads,
The device is provided with:
the plurality of electric drives; and
A central control device in communication with the plurality of electric actuators via a bus,
The central control device comprises:
An information collection unit that collects operation information indicating an operation condition of each of the electric power transmission devices from the electric power transmission devices;
An information analysis unit that analyzes the operation information collected by the information collection unit and generates health information indicating a health degree of each of the electric power transmission devices; and
A display unit for visually displaying the health information,
The information analysis unit establishes a life cycle model of the electric power transmission device based on the operation information, and generates the health information according to the life cycle model,
When the health information of any one of the plurality of electric power drives indicates that the electric power drive has failed, the information analysis unit uses the operation information of the failed electric power drive for establishment of the life cycle model of the other electric power drive,
The information analysis unit takes as the life cycle model an instantaneous failure probability function based on an actual instantaneous failure probability curve obtained by correcting a failure probability in a standard instantaneous failure probability function according to an actual operation time of the failed electric power transmission device.
2. The electric drive health diagnostic system of claim 1,
The operation information at least comprises:
The run time of the electric drive;
the number of times of switching of the power switching member provided in the power transmission device; and
The number of times and/or the time that the operating parameter of the electric drive exceeds a prescribed threshold.
3. The electric power transmission health diagnosis system according to claim 1 or 2,
The information collection means further collects operation information indicating operation conditions of each component provided in the electric power transmission device;
The information analysis unit also establishes a life cycle model of each component based on the operation information of each component, and generates health information of each component according to the life cycle model of each component;
And the display unit is used for displaying the health information of each component in the visual mode and carrying out replacement prompt of each component.
4. The electric power transmission health diagnosis system according to claim 1 or 2,
The operation information of the electric transmission device further includes:
Working state information indicating which state the electric power transmission device is in operation, alarming, and failure; and
A fault code indicating the type of fault when the electric drive is in a fault state,
The operating parameters include at least the operating current, temperature of the electric drive.
5. A central control device for an electric power transmission health diagnosis system for health diagnosis and fault monitoring of a plurality of electric power transmission devices controlling a plurality of loads, the electric power transmission health diagnosis system comprising: the plurality of electric drives; and the central control device communicates with the plurality of electric actuators via a bus,
The central control device comprises:
An information collection unit that collects operation information indicating an operation condition of each of the electric power transmission devices from the electric power transmission devices;
An information analysis unit that analyzes the operation information collected by the information collection unit and generates health information indicating a health degree of each of the electric power transmission devices; and
A display unit for visually displaying the health information,
The information analysis unit establishes a life cycle model of the electric power transmission device based on the operation information, and generates the health information according to the life cycle model,
When the health information of any one of the plurality of electric power drives indicates that the electric power drive has failed, the information analysis unit uses the operation information of the failed electric power drive for establishment of the life cycle model of the other electric power drive,
The information analysis unit takes as the life cycle model an instantaneous failure probability function based on an actual instantaneous failure probability curve obtained by correcting a failure probability in a standard instantaneous failure probability function according to an actual operation time of the failed electric power transmission device.
6. The central control apparatus according to claim 5,
The operation information at least comprises:
The run time of the electric drive;
the number of times of switching of the power switching member provided in the power transmission device; and
The number of times and/or the time that the operating parameter of the electric drive exceeds a prescribed threshold.
7. The central control apparatus according to claim 5 or 6,
The information collection means further collects operation information indicating operation conditions of each component provided in the electric power transmission device;
The information analysis unit also establishes a life cycle model of each component based on the operation information of each component, and generates health information of each component according to the life cycle model of each component;
And the display unit is used for displaying the health information of each component in the visual mode and carrying out replacement prompt of each component.
8. The central control apparatus according to claim 5 or 6,
The operation information of the electric transmission device further includes:
Working state information indicating which state the electric power transmission device is in operation, alarming, and failure; and
A fault code indicating the type of fault when the electric drive is in a fault state,
The operating parameters include at least the operating current, temperature of the electric drive.
9. An electric power transmission health diagnosis method for performing health diagnosis and fault monitoring of a plurality of electric power transmission apparatuses controlling a plurality of loads, the electric power transmission health diagnosis system comprising: the plurality of electric drives; and a central control device that communicates with the plurality of electric power transmission devices via a bus, the electric power transmission device health diagnosis method including the steps of:
an information collection step in which the central control device collects operation information indicating an operation condition of each of the electric power transmission devices;
an information analysis step of analyzing the operation information collected by the information collection step by the central control device and generating health information indicating the health degree of each of the electric power transmission devices; and
A display step of visually displaying the health information by the central control device,
The information analysis step establishes a life cycle model of the electric power transmission device based on the operation information, and generates the health information according to the life cycle model,
When said health information of any one of said plurality of electric drives indicates that the electric drive has failed, said information analyzing step uses said operational information of the failed electric drive for the establishment of said lifecycle model of the other said electric drive,
The information analysis step takes as the life cycle model an instantaneous failure probability function based on an actual instantaneous failure probability curve obtained by correcting the failure probability in a standard instantaneous failure probability function in accordance with the actual operation time of the failed electric power transmission device.
10. The method for diagnosing health of an electric power transmission apparatus according to claim 9,
The operation information at least comprises:
The run time of the electric drive;
the number of times of switching of the power switching member provided in the power transmission device; and
The number of times and/or the time that the operating parameter of the electric drive exceeds a prescribed threshold.
11. The electric power transmission health diagnosis method according to claim 9 or 10,
The information collecting step further collects operation information indicating an operation state of each component provided in the electric power transmission device;
The information analysis step also establishes a life cycle model of each component based on the operation information of each component, and generates health information of each component according to the life cycle model of each component;
And the display step also displays the health information of each component in the visual mode and prompts the replacement of each component.
12. The electric power transmission health diagnosis method according to claim 9 or 10,
The operation information of the electric transmission device further includes:
Working state information indicating which state the electric power transmission device is in operation, alarming, and failure; and
A fault code indicating the type of fault when the electric drive is in a fault state,
The operating parameters include at least the operating current, temperature of the electric drive.
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