CN111404356A - Power supply equipment power grade correction method and corresponding correction device - Google Patents
Power supply equipment power grade correction method and corresponding correction device Download PDFInfo
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- CN111404356A CN111404356A CN202010210599.7A CN202010210599A CN111404356A CN 111404356 A CN111404356 A CN 111404356A CN 202010210599 A CN202010210599 A CN 202010210599A CN 111404356 A CN111404356 A CN 111404356A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R21/00—Arrangements for measuring electric power or power factor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/40—Testing power supplies
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0025—Arrangements for modifying reference values, feedback values or error values in the control loop of a converter
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Abstract
The invention discloses a power supply equipment power grade correction method and a corresponding correction device, wherein the method comprises the steps of obtaining the output power of power supply equipment, the ambient temperature and the actual temperature in a machine, setting the power grade of the power supply equipment, determining the corresponding theoretical temperature through the prestored functional relation, comparing the theoretical temperature with the actual temperature to judge whether the set power grade is matched with the actual power grade, backtracking the corresponding set power grade according to the actual temperature and correcting the set power grade of the power supply equipment when the theoretical temperature and the actual temperature are not matched with each other, and based on the corresponding correction device, the automatic adjustment of the set power grade of the power supply equipment can be realized through the correction method, the advance or lag protection of the power supply equipment is avoided, the damage of the power supply equipment is avoided, the service life of the power supply equipment is prolonged, and the power supply stability of the power supply.
Description
Technical Field
The invention relates to the technical field of power supply equipment control, in particular to a power level correction method and a corresponding correction device for power supply equipment.
Background
The power supply device is a power supply device that outputs alternating current or direct current after overvoltage conversion, such as a UPS, a frequency converter, a charger, an inverter, and the like, and the power supply device has a certain power level (i.e., nominal power), and if the power supply device drives a load exceeding the nominal power for a certain proportion or time, an overload protection mechanism of the power supply device is triggered, and a trigger index of the mechanism is a load rate of the power supply device.
The existing power supply equipment generally adopts a standardized control management system, the power level of the power supply equipment can be set through a human-computer interface, at the moment, the load rate of the power supply equipment is calculated according to the output power and the set power level, for example, the power supply equipment with the nominal power of 20KVA, the power level is set to be 30KVA, the system is judged to be fully loaded when the load is 30KVA, but the overload is 150%, so that the damage of hardware equipment can be caused, and if the power level is set to be lower, the possibility of triggering an overload protection mechanism can be increased, and the working efficiency of the power supply equipment is reduced. By manually setting the power level of the power supply equipment, configuration errors are likely to be caused, the power supply equipment is protected in advance or in a lagging mode, and the electric equipment and the power supply equipment are damaged.
Disclosure of Invention
The present invention is directed to overcome the above-mentioned drawbacks and problems in the related art, and provides a power level correction method and a corresponding correction apparatus for a power device, which can detect whether the power level of the power device is configured incorrectly, and automatically adjust the power level to a correct power level, thereby avoiding early or late protection of the power device due to a load factor calculation error.
In order to achieve the purpose, the invention adopts the following technical scheme:
a power supply equipment power grade correction method is used for correcting a set power grade of power supply equipment to match the actual power grade of the power supply equipment, and based on the functional relation among the set power grade of the power supply equipment, the load rate of the power supply equipment, the ambient temperature of the power supply equipment and the theoretical temperature of the power supply equipment, the correction is realized through the following steps:
acquiring the output power, the ambient temperature and the actual temperature of the power supply equipment at intervals of manually set time, calculating to obtain the theoretical temperature of the power supply equipment according to the functional relation after calculating the load rate according to the output power and the set power level, searching for the adjacent manually set power level by taking the current set power level as a starting point when the difference value of the theoretical temperature and the actual temperature is greater than the manually set threshold value, substituting the searched power level into the functional relation to calculate to obtain the corresponding theoretical temperature, and adjusting the set power level of the power supply equipment according to the set power level corresponding to the newly obtained theoretical temperature until the difference value of the newly obtained theoretical temperature and the actual temperature is less than the manually set threshold value.
Further, when the actual temperature is greater than the sum of the theoretical temperature and the artificially set threshold, the set power level is determined to be greater than the actual power level; when the theoretical temperature is greater than the sum of the actual temperature and the artificially set threshold, the set power level is determined to be less than the actual power level.
Furthermore, the functional relationship among the power level set by the power supply equipment, the load rate of the power supply equipment, the ambient temperature of the power supply equipment and the theoretical temperature of the power supply equipment is obtained through an experimental mode.
Further, the experiment for obtaining the functional relationship among the set power level of the power supply device, the load factor of the power supply device, the ambient temperature of the power supply device and the theoretical temperature of the power supply device includes the following steps:
in a nominal working temperature interval of power supply equipment with known set power level and correct set power level, manually set temperature intervals are arranged, the environment temperature of the power supply equipment is adjusted, the output power of the power supply equipment with different set power levels is adjusted at each different environment temperature, corresponding load rates are obtained through calculation according to the set power levels and the output power, the actual temperature of each power supply equipment under the set power level and the load rate is obtained, namely, the function relation between the set power level and the load rate of the power supply equipment under the environment temperature and the function relation between the set power level and the load rate of the power supply equipment under different environment temperatures are obtained, and the function relation between the set power level and the actual temperature of the power supply equipment can be obtained.
Further, the artificially set power level is stored in a power level look-up table in which actual power levels of different power supply devices within the artificially set range are recorded and arranged according to the size of data.
In addition, the present invention further provides a power supply device power correction apparatus, which is configured to implement the above power supply device power level correction method, and includes:
the temperature acquisition module is used for acquiring the actual temperature of the power supply equipment and the ambient temperature of the power supply equipment;
the output power acquisition module is used for acquiring the output power of the power supply equipment;
the storage module is used for storing a functional relation among the set power grade of the power supply equipment, the load rate of the power supply equipment, the ambient temperature of the power supply equipment and the theoretical temperature of the power supply equipment, recording a power grade lookup table which is used for recording the actual power grades of different power supply equipment in a set range and is arranged according to the size of data, and a manually set threshold;
a control module for receiving the data transmitted by the temperature acquisition module and the output power acquisition module, calculating the load rate of the power supply device according to the output power of the power supply device and the read power level set by the power supply device, calling the functional relationship among the power level set by the power supply device, the load rate of the power supply device, the environment temperature of the power supply device and the theoretical temperature of the power supply device in the storage module, calculating to obtain the theoretical temperature of the power supply device, and comparing the theoretical temperature with the actual temperature of the power supply device, when the difference value is larger than the manually set threshold value, the adjacent power grade of the currently set power grade is searched according to the power grade lookup table and is substituted into the functional relation, until the difference between the recovered theoretical temperature and the actual temperature is less than the artificially set threshold, the set power level of the power supply device is adjusted with the power level corresponding to the retrieved theoretical temperature.
As can be seen from the above description of the present invention, the present invention has the following advantages over the prior art:
1. the output power of the power supply equipment is matched with the known set power level, and the load rate of the power supply equipment on the system can be calculated and obtained, wherein the load rate is used for judging whether the power supply equipment is overloaded or not; based on the function relation among the pre-stored power supply equipment setting power grade, the power supply equipment load rate, the environment temperature of the power supply equipment and the theoretical temperature of the power supply equipment, under the premise of knowing the setting power grade, the load rate and the environment temperature, the corresponding theoretical temperature of the power supply equipment can be obtained; meanwhile, according to the comparison result of the obtained actual temperature and the theoretical temperature of the power supply equipment, when the difference value between the actual temperature and the theoretical temperature is larger than a certain threshold value, the set power level of the power supply equipment can be considered to have an error (the theoretical load rate and the actual load rate have a certain difference value), at the moment, the searched adjacent artificially set power level can be substituted into the functional relation by taking the current set power level as a starting point to obtain a new theoretical temperature, if the difference value between the theoretical temperature and the actual temperature is smaller than the threshold value, the power level corresponding to the theoretical temperature can be considered to be matched with the actual power level, at the moment, the set power level of the power supply equipment can be adjusted according to the power level, and finally the set power level of the power supply equipment can be corrected; through the process, the set power level of the power supply equipment can be adjusted in real time, and the power supply equipment is prevented from triggering protection in advance or triggering protection in a delayed mode due to power level setting errors.
2. The functional relation among the set power level of the power supply equipment, the load rate of the power supply equipment, the ambient temperature of the power supply equipment and the theoretical temperature of the power supply equipment is obtained in a pre-experimental mode, and the functional relation is pre-stored and can be called at any time when the correction method is carried out.
3. The power level lookup table is stored in a pre-recording mode, records actual power levels of different power supply devices in an artificially set range and is arranged according to the size of data, and the power level lookup table can be called at any time when the correction method is carried out.
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 description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a flowchart of an embodiment of a power level correction method for a power supply device according to the present invention;
fig. 2 is a schematic structural diagram of an embodiment of a power correction apparatus for power supply equipment according to the present invention.
Description of the main reference numerals:
10. a temperature acquisition module; 20. a storage module; 30. an output power acquisition module; 40. and a control module.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are presently preferred embodiments of the invention and are not to be taken as an exclusion of other embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In the claims, the specification and the drawings of the present invention, unless otherwise expressly limited, the terms "first", "second" or "third", etc. are used for distinguishing between different items and not for describing a particular sequence.
In the claims, the specification and the drawings of the present invention, unless otherwise expressly limited, all directional or positional relationships indicated by the terms "center," "lateral," "longitudinal," "horizontal," "vertical," "top," "bottom," "inner," "outer," "upper," "lower," "front," "rear," "left," "right," "clockwise," "counterclockwise," and the like are based on the directional or positional relationships indicated in the drawings and are used for convenience in describing the present invention and for simplicity in description, but do not indicate or imply that the device or element so indicated must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be construed as limiting the scope of the present invention.
In the claims, the description and the drawings of the present application, unless otherwise expressly limited, the terms "fixedly connected" or "fixedly connected" should be interpreted broadly, that is, any connection between the two that does not have a relative rotational or translational relationship, that is, non-detachably fixed, integrally connected, and fixedly connected by other devices or elements.
In the claims, the specification and the drawings of the present invention, the terms "including", "having" and their variants, if used, are intended to be inclusive and not limiting.
Referring to fig. 1 and fig. 2, fig. 1 shows a flowchart of an embodiment of a power level correction method for a power supply device provided by the present invention, and fig. 2 shows a schematic structural diagram of an embodiment of a power level correction apparatus for a power supply device provided by the present invention, where the apparatus mainly includes a temperature obtaining module 10, a storage module 20, an output power obtaining module 30, and a control module 40.
Generally, power supply devices manufactured by the same manufacturer generally adopt a general control management system, and the power supply devices have different actual power levels according to corresponding specifications, for example, the actual power level of the power supply device may be 20KVA, 30KVA or other known values. Since the specifications of the power supply devices produced by the manufacturers are relatively determined, the values of all the actual power levels are also known, the value set can form a power supply device power level lookup table, and the value sets of all the power supply devices can fall into the lookup table. The power supply device power class lookup table is stored in advance in the storage module 20 of the power supply device power correction apparatus.
When the power level of the power supply equipment is manually set through the control management system, the power level is adjusted according to the power level lookup table, after the adjustment is finished, the power supply equipment can work according to the set power level, and the power level has corresponding influence on the calculation of the load rate of the power supply equipment.
The load factor is calculated by dividing the output power of the power supply device by the power level of the power supply device, which is the power level set by the control management system. The power level is a preset known value, and the output power of the power supply device can be obtained by the output power obtaining module 30 of the power supply device power correction device.
The power supply device power correction device further includes a temperature obtaining module 10, which may be specifically a temperature sensor, disposed outside the power supply device and inside the power supply device, and configured to obtain an ambient temperature of the power supply device and an actual temperature inside the power supply device, respectively, and a setting position of the temperature sensor should be consistent with a position set in multiple experiments performed when a functional relationship between a power level of the power supply device, a load rate of the power supply device, an ambient temperature of the power supply device, and a theoretical temperature of the power supply device is established, so as to ensure accuracy of the functional relationship.
The power supply equipment sets a functional relation among the power grade, the load rate of the power supply equipment, the ambient temperature of the power supply equipment and the theoretical temperature of the power supply equipment, and the functional relation is obtained through the following processes:
the method comprises the steps of placing a plurality of power supply equipment with different nominal power levels in an experimental environment with the temperature capable of being adjusted manually, adjusting the set power level of each power supply equipment to be the nominal power level, within a nominal working temperature range of the power supply equipment, adjusting the temperature of the experimental environment from an initial temperature (such as 15 ℃) according to a certain temperature interval (such as 0.5 ℃), and obtaining the exact value of the environmental temperature according to a temperature sensor arranged on the power supply equipment. Determining a load rate according to the output power and the power grade of the power supply equipment at each different environmental temperature, acquiring the actual temperature in the machine at the load rate through a temperature sensor in the power supply equipment, and recording the data of the three to form a data set with a corresponding relation; then under the same environmental temperature, adjusting the output power of the power supply equipment to change the load rate, and recording the corresponding actual temperature in the machine, thereby obtaining another data set with the relationship of the three; the output power can be adjusted in a certain interval, and the obtained data is fitted to obtain the change function of the actual temperature of the power supply equipment of the machine type under different load rates at the ambient temperature.
Through the process, the change relation between the load rate of the power supply equipment with different power levels and the actual temperature in the machine in a certain environment temperature interval at each determined environment temperature can be obtained, and therefore the relation model of the load rate of the power supply equipment, the environment temperature and the theoretical temperature is obtained. The theoretical temperature here is an actual temperature corresponding to the above experimental process, and is referred to as a power supply device theoretical temperature when the corresponding internal temperature is estimated by the relational model. The relationship model is stored in the storage module 20 for retrieval by the control module 40.
Obviously, the internal temperature of the power supply equipment is related to the power level, the load rate and the ambient temperature thereof, and under the condition that the ambient temperature and the power level are fixed, the higher the load rate is, the higher the internal temperature of the power supply equipment is, the two have a certain corresponding relationship, so that under the condition of determining the load rate of the power supply equipment, the internal temperature of the corresponding power supply equipment can be obtained, but because the power level setting of the power supply equipment may have errors, the internal temperature of the power supply equipment obtained according to the load rate is only a theoretical temperature, and at the moment, the theoretical temperature is compared with the internal actual temperature obtained through the temperature sensor, so that whether the power level setting of the power supply equipment has errors can be judged.
Specifically, within the range of the artificially set threshold value, when the actual temperature of the power supply equipment is greater than the theoretical temperature, the power level of the power supply equipment is judged to be greater than the actual power level; when the actual temperature of the power supply equipment is lower than the theoretical temperature, the power level of the power supply equipment is judged to be lower than the actual power level; when the actual temperature of the power supply apparatus is equal to the theoretical temperature, the power supply apparatus power level is determined to match the actual power level.
As shown in fig. 1, according to the temperature obtaining module 10 and the output power obtaining module 30 which are arranged on the power supply device, after obtaining the output power, the ambient temperature and the actual temperature of the power supply device, the set power level is read, and the data information is transmitted to the control module 40 for processing and calculation. After calculating the load factor according to the output power and the set power level, the control module 40 retrieves the functional relationship among the set power level of the power supply device, the load factor of the power supply device, the ambient temperature of the power supply device and the theoretical temperature of the power supply device stored in the storage module 20, calculates to obtain the corresponding theoretical temperature, and compares the theoretical temperature with the internal actual temperature obtained by the temperature sensor, and the comparison result and the corresponding processing mode can be divided into the following three cases:
1. the actual temperature of the power supply equipment is greater than the theoretical temperature of the power supply equipment plus a threshold value;
at this time, it can be determined that the power level set by the power supply device is greater than the actual power level, the next power level should be searched downwards on the power level lookup table of the power supply device with the current power level as the starting point, and the theoretical temperature of the power supply device at the power level is obtained by calculating the searched power level through the functional relationship until the difference between the theoretical temperature corresponding to the searched power level and the actual temperature of the power supply device is within the threshold range, that is, the searched power level can be considered as the correct power level, and at this time, the power level of the power supply device can be automatically adjusted to the correct power level through the control module 40.
2. The absolute value of the difference value between the actual temperature of the power supply equipment and the theoretical temperature of the power supply equipment is less than or equal to a threshold value;
at this time, it can be determined that the power level setting of the power supply device is correct without adjusting it.
3. The actual temperature + threshold value of the power supply equipment is less than the theoretical temperature of the power supply equipment;
at this time, it can be determined that the set power level of the power supply device is smaller than the actual power level, the previous power level should be searched upward on the power level lookup table of the power supply device with the current set power level as a starting point, and the theoretical temperature of the power supply device at the power level is obtained by calculating the searched power level through the functional relationship, until the difference between the theoretical temperature corresponding to the searched power level and the actual temperature of the power supply device is within the threshold range, the searched power level can be considered as the correct power level, and at this time, the set power level of the power supply device can be automatically adjusted to the correct power level through the control module 40.
The power level correction method and the corresponding power correction device for the power supply equipment can detect and judge whether the power level setting of the power supply equipment has errors or not, determine the correct power level again by searching data, and control and adjust the power level of the power supply equipment according to the correct power level, thereby realizing the automatic adjustment of the power level of the power supply equipment, avoiding the situation that the power level of the power supply equipment is manually set to be wrong to trigger automatic protection of the power supply equipment to be advanced or delayed, further causing the damage of the power supply equipment, prolonging the service life of the power supply equipment and improving the power supply stability of the power supply equipment.
The description of the above specification and examples is intended to be illustrative of the scope of the present invention and is not intended to be limiting. Modifications, equivalents and other improvements which may occur to those skilled in the art and which may be made to the embodiments of the invention or portions thereof through a reasonable analysis, inference or limited experimentation, in light of the common general knowledge, the common general knowledge in the art and/or the prior art, are intended to be within the scope of the invention.
Claims (6)
1. A power supply equipment power grade correction method is used for correcting the set power grade of the power supply equipment so as to match the actual power grade of the power supply equipment, and is characterized in that based on the functional relation among the set power grade of the power supply equipment, the load rate of the power supply equipment, the ambient temperature of the power supply equipment and the theoretical temperature of the power supply equipment, the correction is realized through the following steps:
acquiring the output power, the ambient temperature and the actual temperature of the power supply equipment at intervals of manually set time, calculating to obtain the theoretical temperature of the power supply equipment according to the functional relation after calculating the load rate according to the output power and the set power level, searching for the adjacent manually set power level by taking the current set power level as a starting point when the difference value of the theoretical temperature and the actual temperature is greater than the manually set threshold value, substituting the searched power level into the functional relation to calculate to obtain the corresponding theoretical temperature, and adjusting the set power level of the power supply equipment according to the set power level corresponding to the newly obtained theoretical temperature until the difference value of the newly obtained theoretical temperature and the actual temperature is less than the manually set threshold value.
2. The power supply apparatus power level correction method as claimed in claim 1, wherein when said actual temperature is greater than a sum of said theoretical temperature and said artificially set threshold, said set power level is determined to be greater than an actual power level; when the theoretical temperature is greater than the sum of the actual temperature and the artificially set threshold, the set power level is determined to be less than the actual power level.
3. The method for correcting the power level of the power supply equipment according to claim 1, wherein the functional relationship among the set power level of the power supply equipment, the load factor of the power supply equipment, the ambient temperature of the power supply equipment and the theoretical temperature of the power supply equipment is obtained through an experimental mode.
4. The method as claimed in claim 3, wherein the experiment for obtaining the functional relationship among the set power level of the power supply device, the load factor of the power supply device, the ambient temperature of the power supply device and the theoretical temperature of the power supply device comprises the following steps:
in a nominal working temperature interval of power supply equipment with known set power level and correct set power level, manually set temperature intervals are arranged, the environment temperature of the power supply equipment is adjusted, the output power of the power supply equipment with different set power levels is adjusted at each different environment temperature, corresponding load rates are obtained through calculation according to the set power levels and the output power, the actual temperature of each power supply equipment under the set power level and the load rate is obtained, namely, the function relation between the set power level and the load rate of the power supply equipment under the environment temperature and the function relation between the set power level and the load rate of the power supply equipment under different environment temperatures are obtained, and the function relation between the set power level and the actual temperature of the power supply equipment can be obtained.
5. The power supply device power level correction method as claimed in claim 1, wherein said manually set power levels are stored in a power level look-up table in which actual power levels of different power supply devices within a manually set range are recorded and arranged according to data size.
6. A power supply device power level correction apparatus for implementing a power supply device power level correction method according to any one of claims 1 to 5, characterized by comprising:
the temperature acquisition module is used for acquiring the actual temperature of the power supply equipment and the ambient temperature of the power supply equipment;
the output power acquisition module is used for acquiring the output power of the power supply equipment;
the storage module is used for storing a functional relation among the set power grade of the power supply equipment, the load rate of the power supply equipment, the ambient temperature of the power supply equipment and the theoretical temperature of the power supply equipment, recording a power grade lookup table which is used for recording the actual power grades of different power supply equipment in a set range and is arranged according to the size of data, and a manually set threshold;
a control module for receiving the data transmitted by the temperature acquisition module and the output power acquisition module, calculating the load rate of the power supply device according to the output power of the power supply device and the read power level set by the power supply device, calling the functional relationship among the power level set by the power supply device, the load rate of the power supply device, the environment temperature of the power supply device and the theoretical temperature of the power supply device in the storage module, calculating to obtain the theoretical temperature of the power supply device, and comparing the theoretical temperature with the actual temperature of the power supply device, when the difference value is larger than the manually set threshold value, the adjacent power grade of the currently set power grade is searched according to the power grade lookup table and is substituted into the functional relation, until the difference between the recovered theoretical temperature and the actual temperature is less than the artificially set threshold, the set power level of the power supply device is adjusted with the power level corresponding to the retrieved theoretical temperature.
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| CN112671073A (en) * | 2021-01-08 | 2021-04-16 | 深圳拓邦股份有限公司 | Power adaptation circuit, controller, electric appliance device, power adaptation method and device |
| CN114615776A (en) * | 2022-03-09 | 2022-06-10 | 珠海市圣昌电子有限公司 | Power supply overheating protection staged load reduction method and system |
| CN117134468A (en) * | 2023-10-25 | 2023-11-28 | 深圳联芯微电子科技有限公司 | Stable PD quick charging system and method for dynamically adjusting power |
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