CN112986708A - Method and device for judging whether bus capacitor needs to be overhauled or replaced - Google Patents
Method and device for judging whether bus capacitor needs to be overhauled or replaced Download PDFInfo
- Publication number
- CN112986708A CN112986708A CN201911215932.7A CN201911215932A CN112986708A CN 112986708 A CN112986708 A CN 112986708A CN 201911215932 A CN201911215932 A CN 201911215932A CN 112986708 A CN112986708 A CN 112986708A
- Authority
- CN
- China
- Prior art keywords
- bus
- ripple voltage
- bus capacitor
- voltage value
- current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000003990 capacitor Substances 0.000 title claims abstract description 103
- 238000000034 method Methods 0.000 title claims abstract description 38
- 238000012423 maintenance Methods 0.000 claims abstract description 7
- 238000012545 processing Methods 0.000 claims description 14
- 238000012937 correction Methods 0.000 claims description 12
- 238000005070 sampling Methods 0.000 claims description 12
- 238000012360 testing method Methods 0.000 description 11
- 238000001514 detection method Methods 0.000 description 9
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
Images
Classifications
-
- 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
- G01R31/003—Environmental or reliability tests
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
- G01R27/2605—Measuring capacitance
Abstract
The invention discloses a method and a device for judging that a bus capacitor needs to be overhauled or replaced, wherein a power grid supplies power to an alternating current load; the method comprises the following steps: collecting load parameters of current electrical equipment; acquiring a bus ripple voltage value of a direct current bus capacitor; judging whether the ripple voltage value of the bus is greater than or equal to a first set threshold value, and if so, determining that the bus capacitor needs to be overhauled or replaced; the first set threshold is defined as a bus ripple voltage value under the load parameter when the residual capacitance rate of the bus capacitor reaches a set value; the first set threshold value is obtained through a first relation model measured in advance according to the load parameter; the first relation model records the bus ripple voltage values of the equipment with the same model as the current electrical equipment under different load parameters under the condition that the residual capacitance rate of the bus capacitor reaches a set value. The method can judge whether the bus capacitor needs to be overhauled or replaced on line, saves maintenance cost and is convenient and fast to operate.
Description
Technical Field
The invention relates to the field of capacitor life management, in particular to a method and a device for judging that a bus capacitor needs to be overhauled or replaced.
Background
In the switching power supply equipment, a capacitor belongs to a vulnerable device, and the failure of a bus capacitor can influence the use reliability of the electrical equipment. Therefore, it is very important to judge that the bus capacitor needs to be repaired or replaced in time.
At present, for a switching power supply sold in the market, taking an uninterruptible power supply system product as an example, off-line detection is generally adopted for predicting the service life of a bus capacitor, namely, an operator periodically disassembles the bus capacitor and detects the capacitance value of the bus capacitor so as to judge whether the bus capacitor needs to be overhauled or replaced.
Disclosure of Invention
The invention aims to overcome the defects or problems in the background technology and provide a method and a device for judging whether a bus capacitor needs to be overhauled or replaced on line.
In order to achieve the purpose, the invention adopts the following technical scheme:
according to the technical scheme, the method for judging whether the bus capacitor needs to be overhauled or replaced comprises the steps that a power grid supplies power to an alternating current load; the method comprises the following steps: collecting load parameters of current electrical equipment; acquiring a bus ripple voltage value of a direct current bus capacitor; judging whether the ripple voltage value of the bus is greater than or equal to a first set threshold value, and if so, determining that the bus capacitor needs to be overhauled or replaced; the first set threshold is defined as a bus ripple voltage value under the load parameter when the residual capacitance rate of the bus capacitor reaches a set value; the first set threshold value is obtained through a first relation model measured in advance according to the load parameter; the first relation model records the bus ripple voltage values of the equipment with the same model as the current electrical equipment under different load parameters under the condition that the residual capacitance rate of the bus capacitor reaches a set value.
Based on the first technical scheme, a second technical scheme is further provided, and in the second technical scheme, the load parameters comprise a load rate and a load correction coefficient.
Based on the technical scheme one or two, a technical scheme three is further provided, and in the technical scheme three, the set value is 80%.
The invention also discloses a device for judging whether the bus capacitor needs to be overhauled or replaced, which is marked as a fourth technical scheme and is used for realizing the method of any one of the first, second or third technical schemes, and the method comprises the following steps: the first acquisition module is used for acquiring and outputting a bus ripple voltage value of the direct current bus capacitor; the second acquisition module is used for acquiring and outputting the current load parameters of the electrical equipment; the first processing module is used for receiving the load parameter and the bus ripple voltage value, inquiring the bus ripple voltage value corresponding to the load parameter when the residual capacitance rate of the bus capacitor reaches a set value in the first relation model, judging whether the received bus ripple voltage value is greater than or equal to the inquired bus ripple voltage value or not, and outputting a warning instruction if the judgment result is yes; the first warning module receives the warning instruction and executes the warning instruction according to the warning instruction; the first relation model records the bus ripple voltage values of the equipment with the same model as the current electrical equipment under different load parameters under the condition that the residual capacitance rate of the bus capacitor reaches a set value.
The invention also discloses a method for judging that the bus capacitor needs to be overhauled or replaced, which is marked as a fifth technical scheme, wherein in the fifth technical scheme, a power grid supplies power for a direct current load; the method comprises the following steps: acquiring the output current and the output voltage of the current electrical equipment; acquiring a bus ripple voltage value of a direct current bus capacitor; judging whether the ripple voltage value of the bus is greater than or equal to a second set threshold value, and if so, determining that the bus capacitor needs to be overhauled or replaced; the second set threshold is defined as a bus ripple voltage value under the output current and the output voltage when the residual capacitance rate of the bus capacitor reaches a set value; the second set threshold is obtained through a second relation model measured in advance according to the output current and the output voltage; and the second relation model records the bus ripple voltage values of the equipment with the same model as the current electrical equipment and under the condition that the residual capacitance rate of the bus capacitor reaches a set value and under different output currents and output voltages.
Based on the fifth technical scheme, a sixth technical scheme is further provided, and in the sixth technical scheme, the set value is 80%.
The invention also discloses a device for judging whether the bus capacitor needs to be overhauled or replaced, which is marked as a technical scheme seven and is used for realizing the method in the technical scheme five or six, and the method comprises the following steps: the first sampling module is used for collecting and outputting a bus ripple voltage value of the direct current bus capacitor; the second sampling module is used for collecting and outputting the current output current and the current output voltage of the electrical equipment; the second processing module is used for receiving the bus ripple voltage value, the output voltage and the output current, inquiring the bus ripple voltage value corresponding to the output voltage and the output current when the residual capacitance rate of the bus capacitor reaches a set value in a second relation model, judging whether the received bus ripple voltage value is greater than or equal to the inquired bus ripple voltage value or not, and outputting an alarm instruction if the judgment result is yes; the second warning module receives the warning instruction and executes the warning instruction according to the warning instruction; and the second relation model records the bus ripple voltage values of the equipment with the same model as the current electrical equipment and under the condition that the residual capacitance rate of the bus capacitor reaches a set value and under different output currents and output voltages.
As can be seen from the above description of the present invention, the present invention has the following advantages over the prior art:
1. in the first technical solution, the determining method of the present invention is suitable for a situation where a power grid supplies power to an ac load, and a first relation model recording "bus ripple voltage values under different load parameters" of a current electrical device of the same model is measured in advance, a first set threshold of the bus ripple voltage can be obtained through the obtained load parameters and the first relation model, and then whether the obtained bus ripple voltage value is greater than or equal to the first set threshold is compared to determine whether the bus capacitor needs to be repaired or replaced, because the larger the bus capacitor is, the smaller the bus ripple voltage value is, and therefore, when the bus ripple voltage value is greater than or equal to the first set threshold, the smaller the bus capacitor residual capacity is determined to be less than the set value, that is, can judge that bus capacitor needs maintenance or change to need not to disassemble bus capacitor and get off and can judge, practiced thrift the maintenance cost, and the operation is more convenient.
2. In the second technical scheme, the load parameters comprise the load rate and the load correction coefficient, and the test result is more accurate.
3. In the fourth technical scheme, the invention also discloses a device for judging whether the bus capacitor needs to be overhauled or replaced, which is used for realizing the method in any one of the first, second or third technical schemes.
4. In the fifth technical solution, the determining method of the present invention is adapted to the situation that the power grid supplies power to the dc load, and a second relation model recording "the same type of current electrical equipment, and under the condition that the remaining capacitance of the bus capacitor reaches a set value, bus ripple voltage values under different output currents and output voltages" is measured in advance, a second set threshold of the bus ripple voltage can be obtained through the obtained output current, output voltage and second relation model, and then whether the obtained bus ripple voltage value is greater than or equal to the second set threshold is compared to determine whether the bus capacitor needs to be repaired or replaced, because the larger the bus capacitor is, the smaller the bus ripple voltage value is, and therefore, when the bus ripple voltage value is greater than or equal to the second set threshold, the remaining capacitance of the bus capacitor is determined to be less than the set value, that is, can judge that bus capacitor needs maintenance or change to need not to disassemble bus capacitor and get off and can judge, practiced thrift the maintenance cost, and the operation is more convenient.
5. In a seventh technical scheme, the invention also discloses a device for judging whether the bus capacitor needs to be overhauled or replaced, which is used for realizing the method in the fifth or sixth technical scheme.
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 schematic view of example 1 of the present invention;
fig. 2 is a schematic view of embodiment 2 of the present invention.
Detailed Description
The technical scheme in the embodiment of the invention is clearly and completely described below. 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 and the description of the present invention, unless otherwise specifically defined, the term "load factor" is used, which is to be understood in a broad sense, i.e. the ratio of the output power to the total capacity of the electrical apparatus; if the term "load modification factor" is used, this should be understood in a broad sense, i.e. a power factor, which is the ratio of active power to apparent power.
In the claims and specification of the present invention, the terms "including", "comprising" and "having", and variations thereof, are intended to be inclusive or non-exclusive.
Example one
The invention discloses a method for judging that a bus capacitor needs to be overhauled or replaced, which is suitable for the condition that a power grid supplies power for an alternating current load, namely the power grid supplies power for the load through AC/DC conversion and DC/AC conversion; the method comprises the following steps:
step 1: acquiring load parameters of current electrical equipment, wherein the load parameters comprise a load rate and a load correction coefficient, the electrical equipment can be a UPS, and the method is not particularly limited in this respect; specifically, the collection of the load parameters can be realized in various ways, preferably, the collector built in the electrical equipment can be used for collecting the output current and the output voltage of the electrical equipment, and then the load rate and the load correction coefficient of the current electrical equipment are obtained by calculation according to the collected output current and the collected output voltage;
step 2: the bus ripple voltage value of obtaining direct current bus capacitor specifically, the bus ripple voltage value of obtaining direct current bus capacitor can have multiple implementation, better, can adopt voltage detection circuit to detect, specifically can detect the voltage at direct current bus capacitor both ends through voltage detection circuit, gets rid of the direct current voltage composition in the voltage, obtains alternating current ripple voltage, calculates the effective value of alternating current ripple voltage to acquire bus ripple voltage value.
And step 3: and judging whether the ripple voltage value of the bus is greater than or equal to a first set threshold value, and if so, determining that the bus capacitor needs to be overhauled or replaced.
The first set threshold is defined as a bus ripple voltage value under the load parameter when the residual capacity of the bus capacitor reaches 80%; the first set threshold value is obtained through a first relation model measured in advance according to the load parameters; the first relation model records the bus ripple voltage values under different load parameters when the residual capacity of the bus capacitor reaches 80% of the equipment with the same model as the current electrical equipment (such as UPS). In specific implementation, the residual capacitance of the bus capacitor can be adjusted according to actual needs, and is not limited to 80%.
For this first relational model, experimental tests may be taken. The content included in the first relational model may be obtained by testing in a laboratory the same model of equipment as the current electrical equipment (e.g., UPS), and in this embodiment, the same model represents the electrical equipment with the same software configuration and hardware configuration. In the testing process, the input voltage of equipment of the same model as the current electrical equipment (such as a UPS) is used as the power grid voltage, the residual capacity rate of the bus capacitor is 80%, different load rates and load correction coefficients are used as independent variables, the measured bus ripple voltage value is used as a dependent variable, a first relation model corresponding to the load rate, the load correction coefficient and the bus ripple voltage value is established, and the first relation model is stored to be used for inquiring when the bus capacitor needs to be overhauled or replaced. The residual capacity rate of the bus capacitor is 80%, and the residual capacity rate can be obtained by reducing the number of the bus capacitors. This process is not described in detail in the embodiments of the present invention.
Further, in the data test statistics, since the similar load rate differences are small, in order to reduce the test man-hour, the load rate in the first relational model can be set to a resolution range, that is, if the actually tested load rate is within the resolution range of a certain set of load rates in the first relational model, the set of load rates matches the load rate. In this example, the resolution range of the load factor is ± 5%.
For example, as shown in table 1, the device of the same model as the current electrical device (e.g., UPS) is shown, and the input voltage is the grid voltage, the remaining capacity rate of the bus capacitor is 80%, and the bus ripple voltage values under different load rates and load correction factors are shown.
TABLE 1
It should be noted that table 1 is only an example of the first relational model, and does not specifically limit the content and data included in the first relational model.
Taking table 1 as an example, assuming that the collected load is 12% and the load correction factor is 1, the values correspond to the load 10%, the load correction factor 1, and the bus ripple voltage value 10V in the table.
In this embodiment, the bus capacitor needs to be overhauled or replaced by the following devices, as shown in fig. 1, the device includes a first acquisition module 101, a second acquisition module 102, a first processing module 103, and a first warning module 104, the first acquisition module 101, the second acquisition module 102, and the first warning module 104 are all electrically connected to the first processing module 103, wherein the first acquisition module 101 acquires and outputs a bus ripple voltage value of the dc bus capacitor; the second acquisition module 102 is used for acquiring and outputting the current load parameters of the electrical equipment; the first processing module 103 is used for receiving the load parameter and the bus ripple voltage value, inquiring the bus ripple voltage value corresponding to the load parameter when the residual capacitance rate of the bus capacitor reaches a set value in the first relation model, comparing whether the received bus ripple voltage value is greater than or equal to the inquired bus ripple voltage value, and outputting an alarm instruction if the judgment result is yes; the first warning module 104 receives the warning command and executes the warning command accordingly.
In a specific implementation, the first acquisition module 101 may be a voltage detection circuit, and the voltage detection circuit detects voltages at two ends of the dc bus capacitor, removes dc voltage components in the voltages to obtain ac ripple voltages, and calculates an effective value of the ac ripple voltages to obtain a bus ripple voltage value; the second collecting module 102 may be a collector built in the electrical device, and the collector collects the output current and the output voltage of the electrical device, and calculates the load factor and the load correction coefficient of the current electrical device according to the collected output current and output voltage; the first processing module 103 can be a processor, the first warning module 104 can be a display panel, and the processing result is displayed.
Example 2
Based on the same invention concept, the invention also discloses a method for judging whether the bus capacitor needs to be overhauled or replaced, which is suitable for the condition that the power grid supplies power for the direct current load, namely the power grid supplies power for the load through AC/DC conversion and DC/DC conversion; the method comprises the following steps:
step 1: acquiring the output current and the output voltage of the current electrical equipment, wherein the electrical equipment can be a UPS (uninterrupted power supply), and the method is not particularly limited in this respect; specifically, the collection of the output current and the output voltage can be realized in various ways, and preferably, the output current and the output voltage of the electrical equipment can be collected through a collector arranged in the electrical equipment;
step 2: the bus ripple voltage value of obtaining direct current bus capacitor specifically, the bus ripple voltage value of obtaining direct current bus capacitor can have multiple implementation, better, can adopt voltage detection circuit to detect, specifically can detect the voltage at direct current bus capacitor both ends through voltage detection circuit, gets rid of the direct current voltage composition in the voltage, obtains alternating current ripple voltage, calculates the effective value of alternating current ripple voltage to acquire bus ripple voltage value.
And step 3: and judging whether the ripple voltage value of the bus is greater than or equal to a second set threshold value, and if so, determining that the bus capacitor needs to be overhauled or replaced.
The second set threshold is defined as a bus ripple voltage value under the output voltage and the output current when the residual capacitance rate of the bus capacitor reaches 80%; the second set threshold is obtained through a second relation model measured in advance according to the output voltage and the output current; the second relation model records bus ripple voltage values under different output voltages and output currents when the residual capacity of the bus capacitor reaches 80% of the equipment of the same model as the current electrical equipment (such as UPS). In specific implementation, the residual capacitance of the bus capacitor can be adjusted according to actual needs, and is not limited to 80%.
For this second relational model, experimental tests may be taken. The contents included in the second relational model can be obtained by testing in a laboratory the same model of equipment as the current electrical equipment (such as a UPS), and in this embodiment, the same model represents the electrical equipment with the same software configuration and hardware configuration. In the testing process, the input voltage is used as the power grid voltage, the residual capacity of the bus capacitor is 80%, different output voltages, output currents and load correction coefficients are used as independent variables, the measured bus ripple voltage value is used as a dependent variable, a second relation model corresponding to the output voltages, the output currents and the bus ripple voltage value is established, and the second relation model is stored to be used for inquiring when whether the bus capacitor needs to be overhauled or replaced. The residual capacity rate of the bus capacitor is 80%, and the residual capacity rate can be obtained by reducing the number of the bus capacitors. This process is not described in detail in the embodiments of the present invention.
Further, in the data test statistics, since the similar output voltages and output currents have little difference, in order to reduce the test man-hour, the output voltages and output currents in the second relational model can be set with a resolution range, that is, if the actually tested output voltages and output currents are within the resolution range of a certain set of output voltages and output currents in the second relational model, the set of output voltages and output currents are matched with the output voltages and output currents. In this embodiment, the resolution range of the output voltage and the output current is ± 5%.
For example, as shown in table 2, the same type of equipment as the current electrical equipment (e.g., UPS) is shown, and the residual capacity of the bus capacitor is 80% according to the input voltage as the grid voltage, and the bus ripple voltage values at different output currents and output voltages.
TABLE 2
It should be noted that table 2 is only an example for describing the second relational model, and does not specifically limit the contents and data included in the second relational model.
Taking the table 2 as an example, assuming that the collected output voltage is 45V and the collected output current is 4.5A, the output voltage corresponds to 50V, 5A and 2V, respectively.
In this embodiment, the bus capacitor needs to be overhauled or replaced by the following device, as shown in fig. 2, the device includes a first sampling module 201, a second sampling module 202, a second processing module 203, and a second warning module 204, the first sampling module 201, the second sampling module 202, and the second warning module 204 are all electrically connected to the second processing module 203, wherein the first sampling module 201 collects and outputs a bus ripple voltage value of the dc bus capacitor; the second sampling module 202 is used for collecting and outputting the current output current and the current output voltage of the electrical equipment; the second processing module 203 receives the output current, the output voltage and the bus ripple voltage value, queries the corresponding bus ripple voltage value of the output current and the output voltage when the residual capacitance rate of the bus capacitance reaches a set value in the second relation model, compares whether the received bus ripple voltage value is greater than or equal to the queried bus ripple voltage value, and outputs a warning instruction if the judgment result is yes; the second alert module 204 receives the alert command and executes it accordingly.
In a specific implementation, the first sampling module 201 may be a voltage detection circuit, and the voltage detection circuit detects voltages at two ends of the dc bus capacitor, removes dc voltage components in the voltages to obtain ac ripple voltages, and calculates an effective value of the ac ripple voltages to obtain a bus ripple voltage value; the second sampling module 202 is a collector arranged in the electrical equipment, the collector collects the output current and the output voltage of the electrical equipment, the second processing module 203 can be a processor, the second warning module 204 can be a display panel, and the processing result is displayed.
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 (7)
1. A method for judging that a bus capacitor needs to be overhauled or replaced is characterized in that a power grid supplies power to an alternating current load; the method comprises the following steps: collecting load parameters of current electrical equipment;
acquiring a bus ripple voltage value of a direct current bus capacitor;
judging whether the ripple voltage value of the bus is greater than or equal to a first set threshold value, and if so, determining that the bus capacitor needs to be overhauled or replaced;
the first set threshold is defined as a bus ripple voltage value under the load parameter when the residual capacitance rate of the bus capacitor reaches a set value;
the first set threshold value is obtained through a first relation model measured in advance according to the load parameter;
the first relation model records the bus ripple voltage values of the equipment with the same model as the current electrical equipment under different load parameters under the condition that the residual capacitance rate of the bus capacitor reaches a set value.
2. The method for judging the need of maintenance or replacement of the bus capacitor as claimed in claim 1, wherein: the load parameters include a load rate and a load correction factor.
3. The method for judging the need of the bus capacitor to be repaired or replaced according to claim 1 or 2, characterized by comprising the following steps: the set value is 80%.
4. A device for judging whether a bus capacitor needs to be repaired or replaced, which is used for realizing the method of any one of claims 1-3, and is characterized by comprising the following steps:
the first acquisition module is used for acquiring and outputting a bus ripple voltage value of the direct current bus capacitor;
the second acquisition module is used for acquiring and outputting the current load parameters of the electrical equipment;
the first processing module is used for receiving the load parameter and the bus ripple voltage value, inquiring the bus ripple voltage value corresponding to the load parameter when the residual capacitance rate of the bus capacitor reaches a set value in the first relation model, judging whether the received bus ripple voltage value is greater than or equal to the inquired bus ripple voltage value or not, and outputting a warning instruction if the judgment result is yes;
the first warning module receives the warning instruction and executes the warning instruction according to the warning instruction;
the first relation model records the bus ripple voltage values of the equipment with the same model as the current electrical equipment under different load parameters under the condition that the residual capacitance rate of the bus capacitor reaches a set value.
5. A method for judging that a bus capacitor needs to be overhauled or replaced is characterized by comprising the following steps: the power grid supplies power to the direct current load; the method comprises the following steps: acquiring the output current and the output voltage of the current electrical equipment;
acquiring a bus ripple voltage value of a direct current bus capacitor;
judging whether the ripple voltage value of the bus is greater than or equal to a second set threshold value, and if so, determining that the bus capacitor needs to be overhauled or replaced;
the second set threshold is defined as a bus ripple voltage value under the output current and the output voltage when the residual capacitance rate of the bus capacitor reaches a set value;
the second set threshold is obtained through a second relation model measured in advance according to the output current and the output voltage;
and the second relation model records the bus ripple voltage values of the equipment with the same model as the current electrical equipment and under the condition that the residual capacitance rate of the bus capacitor reaches a set value and under different output currents and output voltages.
6. The method for judging the need of maintenance or replacement of the bus capacitor as claimed in claim 5, wherein: the set value is 80%.
7. An apparatus for determining that a bus capacitor needs to be repaired or replaced, which is used for implementing the method of claim 5 or 6, and is characterized by comprising:
the first sampling module is used for collecting and outputting a bus ripple voltage value of the direct current bus capacitor;
the second sampling module is used for collecting and outputting the current output current and the current output voltage of the electrical equipment;
the second processing module is used for receiving the bus ripple voltage value, the output voltage and the output current, inquiring the bus ripple voltage value corresponding to the output voltage and the output current when the residual capacitance rate of the bus capacitor reaches a set value in the second relation model, judging whether the received bus ripple voltage value is greater than or equal to the inquired bus ripple voltage value or not, and outputting a warning instruction if the judgment result is yes;
the second warning module receives the warning instruction and executes the warning instruction according to the warning instruction;
and the second relation model records the bus ripple voltage values of the equipment with the same model as the current electrical equipment and under the condition that the residual capacitance rate of the bus capacitor reaches a set value and under different output currents and output voltages.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911215932.7A CN112986708B (en) | 2019-12-02 | 2019-12-02 | Method and device for judging maintenance or replacement of bus capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911215932.7A CN112986708B (en) | 2019-12-02 | 2019-12-02 | Method and device for judging maintenance or replacement of bus capacitor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112986708A true CN112986708A (en) | 2021-06-18 |
| CN112986708B CN112986708B (en) | 2024-03-15 |
Family
ID=76331284
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911215932.7A Active CN112986708B (en) | 2019-12-02 | 2019-12-02 | Method and device for judging maintenance or replacement of bus capacitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112986708B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113608046A (en) * | 2021-07-27 | 2021-11-05 | 科华数据股份有限公司 | Capacitor life detection method and device and terminal equipment |
| CN113917356A (en) * | 2021-09-14 | 2022-01-11 | 科华数据股份有限公司 | UPS part monitoring device |
| CN114122996A (en) * | 2021-11-25 | 2022-03-01 | 广东电网有限责任公司 | Capacitor maintenance method and device and transformer voltage regulation early warning method and device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201069461Y (en) * | 2007-06-18 | 2008-06-04 | 深圳市中传电气技术有限公司 | A life monitoring device for aluminum electrolysis capacitor in the frequency converter |
| WO2009028837A1 (en) * | 2007-08-29 | 2009-03-05 | Powertron Engineering Co., Ltd | Aging status diagnostic apparatus for power conversion system, and method their of |
| CN104539042A (en) * | 2014-12-11 | 2015-04-22 | 华为技术有限公司 | Uninterrupted power system |
| CN105866554A (en) * | 2015-01-19 | 2016-08-17 | 艾默生网络能源有限公司 | Capacitance detection device, method and apparatus of DC bus capacitor |
-
2019
- 2019-12-02 CN CN201911215932.7A patent/CN112986708B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201069461Y (en) * | 2007-06-18 | 2008-06-04 | 深圳市中传电气技术有限公司 | A life monitoring device for aluminum electrolysis capacitor in the frequency converter |
| WO2009028837A1 (en) * | 2007-08-29 | 2009-03-05 | Powertron Engineering Co., Ltd | Aging status diagnostic apparatus for power conversion system, and method their of |
| CN104539042A (en) * | 2014-12-11 | 2015-04-22 | 华为技术有限公司 | Uninterrupted power system |
| CN105866554A (en) * | 2015-01-19 | 2016-08-17 | 艾默生网络能源有限公司 | Capacitance detection device, method and apparatus of DC bus capacitor |
Non-Patent Citations (2)
| Title |
|---|
| 杜银瑜: "铝电解电容失效对DC_DC变换器健康状况的影响分析", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》 * |
| 王鸿麟: "《电源模块选型指南》", 湖南科学技术出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113608046A (en) * | 2021-07-27 | 2021-11-05 | 科华数据股份有限公司 | Capacitor life detection method and device and terminal equipment |
| CN113917356A (en) * | 2021-09-14 | 2022-01-11 | 科华数据股份有限公司 | UPS part monitoring device |
| CN114122996A (en) * | 2021-11-25 | 2022-03-01 | 广东电网有限责任公司 | Capacitor maintenance method and device and transformer voltage regulation early warning method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112986708B (en) | 2024-03-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112986708B (en) | Method and device for judging maintenance or replacement of bus capacitor | |
| CN102170124B (en) | Early warning method of stable-state index of power quality | |
| CN111965418B (en) | Abnormality detection and electric quantity compensation method and system for electric energy metering device | |
| CN103076491B (en) | Supply line's detection method of AC/DC universal and testing circuit | |
| CN109946505A (en) | Method for detecting voltage drop, system, readable storage medium storing program for executing and computer equipment | |
| CN105954632A (en) | Zinc oxide lightning arrester on-line monitoring and diagnostic method | |
| CN1034836C (en) | Device for detecting failure of battery cells | |
| CN202886575U (en) | Device for rapidly detecting performance of power module | |
| KR102056856B1 (en) | Method for monitoring and analyzing electrical power system using PMU data and COMTRADE type data | |
| CN108693442A (en) | The detection method and system of electric network fault | |
| CN109596947B (en) | Electrical insulation aging monitoring and early warning method and device based on insulation conductance | |
| CN114545282A (en) | Power failure detection method and device and power utilization equipment with same | |
| CN111751775B (en) | Method and device for detecting current sampling failure | |
| CN105445674A (en) | AC/DC power supply fault analyzing device and detection method thereof | |
| CN115469241A (en) | Fault detection method and device for charging module of direct-current power supply system | |
| CN115561663A (en) | Method and test system for evaluating reliability of power supply module | |
| CN115343650A (en) | High-precision digital power supply system based on embedded system | |
| CN114089090A (en) | Power distribution network fault indicator with capacitor voltage division power taking function and control method thereof | |
| KR20080010175A (en) | Battery monitoring system and method for uninterruptible power supply | |
| CN114689926A (en) | Power failure detection method and device and electric equipment with same | |
| KR101774451B1 (en) | Device and method monitoring the PEMFC stack using a signal processing method | |
| CN205193247U (en) | AC/DC power supply failure analysis appearance | |
| CN215813114U (en) | Bus capacitor life monitoring circuit and system | |
| CN110954811A (en) | Low-voltage circuit breaker contact detection device and method | |
| CN217112527U (en) | System for detecting failure of electrolytic capacitor of frequency converter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |