CN110222399B - Power health assessment method and device - Google Patents
Power health assessment method and device Download PDFInfo
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- CN110222399B CN110222399B CN201910457955.2A CN201910457955A CN110222399B CN 110222399 B CN110222399 B CN 110222399B CN 201910457955 A CN201910457955 A CN 201910457955A CN 110222399 B CN110222399 B CN 110222399B
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- G06F30/20—Design optimisation, verification or simulation
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- G—PHYSICS
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- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
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- G06Q50/06—Electricity, gas or water supply
Abstract
The invention provides a power health assessment method and a power health assessment device. The method has low requirement on parameter detection, can be used for various power supplies, and further can detect and evaluate the health state of the power supplies in real time when the power supplies work.
Description
Technical Field
The invention relates to the field of power supply health assessment, in particular to a power supply health assessment method and device.
Background
With the development of power electronic technology, the switching power supply is widely applied due to the advantages of high conversion rate, high power density, good stability and small volume and weight. The switching power supply utilizes modern power electronic technology, maintains stable output voltage by controlling the on duty ratio of the power switching tube, and has obvious conversion rate advantage compared with the traditional linear power supply.
The DC/DC (direct current to direct current) switching power supply is one of the most reliable components of the power supply unit for many electronic and electrical devices, and once a fault occurs, the whole electronic and electrical device is usually unable to work, so it is urgently needed to perform health assessment on the switching power supply, provide support for use and maintenance, and reduce the fault occurrence rate.
Disclosure of Invention
In order to solve the problem of evaluating the health state of the power supply, the invention provides a power supply health evaluation method and a power supply health evaluation device.
In order to achieve the above object, the technical solutions provided by the embodiments of the present invention are as follows:
in a first aspect, an embodiment of the present invention provides a power health assessment method, including: the method comprises the following steps of collecting input data and output data of a power supply; the processing step comprises calculating the conversion rate of the power supply according to the input data and the output data; the evaluating step includes calculating the health degree of the power supply according to a preset health degree-conversion rate function and the conversion rate.
With reference to the first aspect, in some possible implementations, the input data includes input power, and the output data includes output power; the health-to-conversion-rate function is:
wherein H t Is the degree of health, η t Is said conversion ratio, eta 0 To the initial conversion rate, η failure Is the critical conversion rate.
With reference to the first aspect, in some possible implementations, the processing step includes: calculating a ratio of the input data and the output data as the conversion rate.
With reference to the first aspect, in some possible implementations, the method further includes: and determining the health state corresponding to the health degree according to a preset health state-health degree function.
With reference to the first aspect, in some possible implementations, in the acquiring step, input data and output data of the power supply are acquired within a period of time, in the processing step, an average value of the input data and the output data within the period of time is calculated, and a conversion rate of the power supply is calculated according to the average value of the input data and the output data.
With reference to the first aspect, in some possible implementation manners, in the acquiring step, input data and output data of the power supply under multiple load conditions are acquired, in the processing step, an average value of the input data and the output data under multiple load conditions is calculated, and a conversion rate of the power supply is calculated according to the average value of the input data and the output data.
In a second aspect, an embodiment of the present invention further provides a power health assessment apparatus, including: the device comprises an acquisition unit, a processing unit and an evaluation unit, wherein the acquisition unit is used for acquiring input data and output data of a power supply; the processing unit is used for calculating the conversion rate of the power supply according to the input data and the output data; the evaluation unit is used for calculating the health degree of the power supply according to a preset health degree-conversion rate function and the conversion rate.
With reference to the second aspect, in some possible implementations, the evaluation unit is further configured to determine a health state corresponding to the health degree of the power supply according to a preset health state-health degree function.
With reference to the second aspect, in some possible implementation manners, the collecting unit is further configured to collect input data and output data of the power supply within a period of time, and the processing unit is further configured to calculate an average value of the input data and the output data within the period of time, and calculate the conversion rate of the power supply according to the average value of the input data and the output data.
With reference to the second aspect, in some possible implementation manners, the acquisition unit is further configured to acquire input data and output data of the power supply under multiple load conditions, and the processing unit is further configured to calculate an average value of the input data and the output data under multiple load conditions, and calculate the conversion rate of the power supply according to the average value of the input data and the output data.
The beneficial effects of the invention include:
the method has low requirement on parameter detection, can be used for various power supplies, and further can detect and evaluate the health state of the power supply in real time when the power supply works.
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanying figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic flow chart illustrating a power health assessment method according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of a power health assessment scenario according to an embodiment of the present invention;
fig. 3 is a functional block diagram of a power health assessment apparatus according to an embodiment of the present invention.
The figure is as follows: 10-a power health assessment device; 11-a collecting unit; 12-a processing unit; 13-evaluation unit.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
Referring to fig. 1, fig. 1 is a schematic flow chart of a power health assessment method according to an embodiment of the present invention, where the method includes:
step S101: an acquisition step, acquiring input data and output data of a power supply;
step S102: a processing step, calculating the conversion rate of the power supply according to the input data and the output data;
step S103: and an evaluation step, namely calculating the health degree of the power supply according to a preset health degree-conversion rate function and the conversion rate.
The input data and the output data may be an input current value and an output current value of the power supply, or may be input power and output power of the power supply, and the like, which is not limited herein; the conversion ratio may be calculated as a ratio of the input power to the output power, and the invention is not limited thereto.
Taking data of input and output aspects as reference characteristics, and evaluating the conversion rate by using a preset health degree-conversion rate function, so that the actual physical relationship of the converter in the power supply can be reflected actually; on the other hand, the input data and the output data are convenient to measure and collect, the industrial application universality is high, and the health assessment can be carried out in real time during the power supply work.
Specifically, the power supply health assessment method provided by the invention is mainly directed at a DC/DC switching power supply, and a person skilled in the art knows that most of the loss of the switching power supply is conduction loss, and in the using process, the power loss of the switching power supply is gradually increased, and the conversion rate is gradually reduced, so that the conversion rate of the switching power supply is detected and calculated, and the health assessment of the switching power supply can be realized.
The method has the advantages that the input data and the output data of the power supply are used as the degradation characteristic parameters, the health state of the power supply is calculated according to the conversion rate, the requirement on parameter detection is low, the universality is good, and real-time health assessment of the power supply under the working condition can be carried out; the embodiment conforms to the physical failure and degradation characteristics of the DC/DC switching power supply, has low requirements (especially sampling frequency) for parameter monitoring and good universality, and can carry out real-time health assessment on a single DC/DC switching power supply in a working state.
Optionally, the input data and the output data include: input power and output power, the health-to-conversion-rate function is:
wherein H t Is degree of health, eta t Is the conversion rate, eta 0 To the initial conversion rate, η failure Is a predetermined critical conversion rate.
Specifically, the input power and the output power can be obtained by detecting and calculating the input current, the input voltage, the output current and the output voltage of the power supply; eta 0 Can calculate the initial input power and the initial output power, eta, when the power supply is used for the first time 0 I.e. the ratio of the primary output power to the primary input power, η failure The preset setting can be specifically set according to the power supply use scene and the like, but the invention does not need to set the setting for the purposeAnd (4) making a limitation.
The initial conversion rate and the critical conversion rate are combined to evaluate the health state of the power supply together, the failure physics and degradation characteristics of the switching power supply are met, and the health state of the power supply can be comprehensively evaluated from the initial aspect and the fault aspect.
Optionally, after step S103, the method further includes: and determining the health state corresponding to the health degree according to the preset health state segmentation interval.
Specifically, if only a health degree value is given, the analysis on the health of the power supply is not easy to be directly performed by actual working personnel, the health state of the power supply can be directly judged according to the health degree through a preset health state-health degree function, and then the working personnel can conveniently perform corresponding processing on the power supply.
Optionally, a health state-health function is:
wherein St is a healthy state, and Ht is the above-mentioned healthy degree. Specifically, the two interval end values of 0.3 and 0.7 in the formula are a referable value provided in the embodiment of the present invention, and in other embodiments, other interval end values may also be set, which is not limited in the present invention.
In other embodiments, more refined health status segments may be designed, such as good, bad, and the like, and other health degree value intervals may also be adopted, which is not limited in the present invention.
Optionally, in the acquiring step, input data and output data of the power supply are acquired within a period of time, in the processing step, an average value of the input data and the output data within the period of time is calculated, and a conversion rate of the power supply is calculated according to the average value of the input data and the output data.
Continuous input data and output data of the power supply can be collected for a period of time selectively, the values are averaged, and then the health degree is calculated, so that the influence of some abnormal signals in the use of the power supply on the health evaluation of the power supply can be avoided, the evaluation reliability is increased, and the evaluation complexity is increased.
Optionally, the input data and the output data in the instantaneous signal of the power supply can also be acquired, and the power supply can be evaluated as soon as possible in a shorter time, so that the evaluation process has lower requirements and is more convenient.
Optionally, step S101 further includes: in the step of collecting, collecting input data and output data of the power supply under various load conditions, in the step of S102, calculating an average value of the input data and the output data under various load conditions, and calculating a conversion rate of the power supply according to the average value of the input data and the output data.
The technical personnel in the field know that the conversion rates of the power supply can be different when different loads are connected, so that the working data under various preset load conditions are collected, the performance of the power supply under different loads can be evaluated in a reference manner, the condition that the work is influenced due to the fact that the power supply is abnormal under a certain load condition is prevented, and the stability of the power supply health evaluation method provided by the invention is improved.
In order to enable those skilled in the art to more fully understand the power health assessment method provided by the embodiments of the present invention, an overall process of power health assessment is described below to make the present invention more understandable. Referring to fig. 2, fig. 2 is a schematic flow chart illustrating a power health assessment scenario according to an embodiment of the invention.
In a power health assessment scenario, input voltage, current and output voltage and current in the form of continuous signals are collected as input data and output data, and a critical conversion rate eta is preset failure (ii) a When the power supply is used for the first time, the input voltage and current, the output voltage and current of the power supply are collected, the average value of each of the four values in a continuous time period is calculated, the input power and the output power of the power supply during the first time work can be obtained according to an electric power formula, and the initial conversion rate eta of the power supply is obtained 0 (ii) a In the power supply operation thereafter, it can be assumed that this time is at time tAnd then collecting the input voltage and current and the output voltage and current of the power supply during working, calculating the average value of the four values in a continuous time period, obtaining the input power and the output power of the power supply during working, and further obtaining the conversion rate eta of the power supply at the time t t Further, the health degree H of the power supply at the time t can be obtained according to the health degree-conversion rate function t And the interval can be further segmented according to the health state to obtain the health state of the power supply.
Referring to fig. 3, fig. 3 is a functional block diagram of a power health assessment apparatus 10 according to an embodiment of the present invention. The apparatus 10 comprises: the device comprises a collecting unit 11, a processing unit 12 and an evaluating unit 13, wherein the collecting unit 11 is used for collecting input data and output data of a power supply; the processing unit 12 is configured to calculate a conversion rate of the power supply according to the input data and the output data; the evaluation unit 13 is configured to calculate the health degree of the power supply according to a preset health degree-conversion rate function and the conversion rate.
Optionally, the evaluation unit 13 is further configured to determine a health state corresponding to the health degree of the power supply according to a preset health state-health degree function.
Optionally, the collecting unit 11 is configured to collect input data and output data of the power supply within a period of time, and the processing unit 12 is configured to calculate an average value of the input data and the output data within the period of time, and calculate a conversion rate of the power supply according to the average value of the input data and the output data.
Optionally, the collecting unit 11 is configured to collect an average value of input data and output data of the working data of the power supply under multiple load conditions, and the processing unit 12 is configured to calculate the average value of the input data and the output data under multiple load conditions, and calculate the conversion rate of the power supply according to the average value of the input data and the output data.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method can be implemented in other ways. The apparatus embodiments described above are merely illustrative, and for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus and methods according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems that perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In addition, the functional modules in the embodiments of the present invention may be integrated together to form an independent part, or each module may exist alone, or two or more modules may be integrated to form an independent part.
The present invention has been described in terms of the preferred embodiment, and it is not intended to be limited to the embodiment. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A method for assessing the health of a power source, the method comprising:
an acquisition step, which is to acquire input data and output data of a power supply;
a processing step, calculating the conversion rate of the power supply according to the input data and the output data;
an evaluation step, calculating the health degree of the power supply according to a preset health degree-conversion rate function and the conversion rate,
the input data comprises input power and the output data comprises output power;
the health-to-conversion-rate function is:
wherein H t Is the degree of health, η t Is said conversion ratio, η 0 To the initial conversion rate, η failure In order to obtain the critical conversion rate,
the processing step comprises:
calculating a ratio of the input data and the output data as the conversion rate.
2. The power health assessment method of claim 1, further comprising: and determining the health state corresponding to the health degree according to a preset health state-health degree function.
3. The power health assessment method according to claim 1 or 2, wherein in the collecting step, input data and output data of the power supply are collected over a period of time, and in the processing step, an average value of the input data and the output data over the period of time is calculated, and a conversion rate of the power supply is calculated from the average value of the input data and the output data.
4. The power health assessment method according to claim 1 or 2, wherein in the collecting step, input data and output data of the power under a plurality of load conditions are collected, in the processing step, an average value of the input data and the output data under the plurality of load conditions is calculated, and the conversion rate of the power is calculated from the average value of the input data and the output data.
5. A power source health assessment apparatus, the apparatus comprising:
the acquisition unit is used for acquiring input data and output data of the power supply;
the processing unit is used for calculating the conversion rate of the power supply according to the input data and the output data;
an evaluation unit for calculating the health degree of the power supply according to a preset health degree-conversion rate function and the conversion rate,
the input data comprises input power and the output data comprises output power;
the health-to-conversion-rate function is:
wherein H t Is the degree of health, eta t Is said conversion ratio, eta 0 To the initial conversion rate, eta failure In order to obtain the critical conversion rate,
the processing unit is further configured to calculate a ratio of the input data and the output data as the conversion rate.
6. The power health assessment device according to claim 5, wherein the assessment unit is further configured to determine a health status corresponding to the health of the power supply according to a preset health status-health function.
7. The power health assessment device according to claim 5 or 6, wherein the collecting unit is further configured to collect input data and output data of the power supply for a period of time, and the processing unit is further configured to calculate an average value of the input data and the output data for the period of time, and calculate the conversion rate of the power supply according to the average value of the input data and the output data.
8. The power health assessment device according to claim 5 or 6, wherein the collecting unit is further configured to collect input data and output data of the power under multiple load conditions, and the processing unit is further configured to calculate an average value of the input data and the output data under multiple load conditions, and calculate the conversion rate of the power according to the average value of the input data and the output data.
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