CN112240967A - On-line monitoring device and system for power electronic device - Google Patents
On-line monitoring device and system for power electronic device Download PDFInfo
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- CN112240967A CN112240967A CN201910582815.8A CN201910582815A CN112240967A CN 112240967 A CN112240967 A CN 112240967A CN 201910582815 A CN201910582815 A CN 201910582815A CN 112240967 A CN112240967 A CN 112240967A
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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
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1281—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of liquids or gases
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
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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
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Abstract
The invention discloses an online monitoring device and system for a power electronic device, wherein the device comprises: the power electronic device comprises an isolation box body sleeved outside an isolation object; insulating oil is filled in the isolation box body; the isolation object comprises a power electronic power device and a control driving unit; the isolation box body is provided with an external connection through hole which can be insulated and sealed; the monitoring device includes: the system comprises a temperature sensor for collecting temperature data of the insulating oil, an analysis unit for analyzing components of dissolved gas in the insulating oil, and a communication unit for transmitting the temperature data and analysis result data to a preset upper computer; the external connecting wire of the isolated object is connected with external equipment through the external connection through hole; the external device includes one of a communication unit, a power supply, a load, and a superior controller, and any combination thereof. According to the invention, the alarm information can be generated in real time when the temperature or the electrical performance inside the isolation box body is abnormal, so that the operation reliability of the power electronic device is improved.
Description
Technical Field
The invention relates to the field of petrochemical equipment, in particular to an online monitoring device and system for a power electronic device.
Background
With the wide application and development of power electronic technology, the power electronic devices (such as frequency converters, SVG, UPFC, rectifiers, dc power supplies and other devices) applied to high-power wind power converters, photovoltaic inverters, arc furnaces, welding and other devices have increasingly greater influence on the overall stability, safety and reliability of electrical equipment.
Based on the above, how to protect the safe and reliable operation of the power electronic device to avoid the damage of the device, thereby reducing the occurrence rate of the electrical fault to the maximum extent, and having great significance for the power electronic device.
The inventor finds that, in the prior art, a mode of directly acquiring data of a monitored object (namely, a power electronic device) through monitoring devices such as a temperature sensor cannot be applied to the power electronic device to be isolated, so that the monitoring effect of the power electronic devices is poor, and the risk that faults of the power electronic devices cannot be found in time exists.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides an online monitoring device and system for a power electronic device. The invention can monitor the power electronic device in the severe environment in real time.
The invention provides an on-line monitoring device for a power electronic device, which comprises:
the power electronic device comprises an isolation box body sleeved outside an isolation object; insulating oil is filled in the isolation box body; the isolated object comprises a power electronic power device and a control driving unit; the isolation box body is provided with an external connection through hole capable of being sealed in an insulating way;
the monitoring device includes: the system comprises a temperature sensor for collecting temperature data of the insulating oil, an analysis unit for analyzing components of dissolved gas in the insulating oil, and a communication unit for transmitting the temperature data and analysis result data to a preset upper computer;
the external connecting line of the isolated object is connected with external equipment through the external connection through hole; the external device includes one of the communication unit, a power supply, a load, and a superior controller, and any combination thereof.
Preferably, in the present invention, the outer wall of the isolation box further includes heat dissipation fins.
Preferably, in the present invention, the insulation oil displacement mechanism is further included;
and the insulating oil displacement mechanism realizes displacement of the insulating oil inside and outside the isolation box body through the oil inlet and the oil outlet which are arranged on the isolation box body.
Preferably, in the invention, the device further comprises an automatic control unit;
and the automatic control unit controls the opening and closing of the insulating oil displacement mechanism according to a control instruction generated by the temperature data.
Preferably, in the invention, an oil filter is further included;
the oil filter is communicated with the insulating oil displacement mechanism and is used for filtering the insulating oil displaced from the isolation box body.
Preferably, in the invention, a guide pipe is further arranged in the isolation box body;
the guide pipe comprises a conveying part and a drainage part; one end of the conveying part is communicated with the oil outlet, and the drainage part is arranged at a position close to the isolation object; different positions of the drainage part comprise a plurality of drainage holes.
Preferably, in the present invention, the power electronic power device and the control driving unit adopt an IGBT module set.
The invention also provides an online monitoring system for the power electronic device, which comprises the online monitoring device and an upper computer;
and the upper computer is used for generating a monitoring result of the isolated object according to a preset algorithm by taking the temperature data and the analysis result data received from the online monitoring device as parameters.
Preferably, in the present invention, the preset algorithm includes:
performing fluid heat transfer calculation by taking the temperature data as a parameter to obtain an estimated temperature value of the isolated object;
and generating alarm information when the temperature estimation value exceeds a preset temperature threshold range.
Preferably, in the present invention, the preset algorithm includes:
judging whether discharge or/and local overheating occurs in the isolation box body according to the analysis result data;
and if so, generating alarm information.
Advantageous effects
The application scene of the on-line monitoring device is used for a specific power electronic device; specifically, in order to reduce the failure rate of the power electronic device in severe environments such as high and low temperature, humidity and air pollution and prolong the service life of the power electronic device, the power electronic device comprises an isolation device, namely, an isolation box body is sleeved outside the power electronic device needing isolation, so that the normal operation of the power electronic device is prevented from being influenced by the temperature rise after the power electronic device is isolated, the isolation box body is made of metal, and in addition, insulating oil with excellent heat conduction performance is arranged in the isolation box body, so that the over-high temperature of the power electronic device caused by isolation can be avoided.
Although the power electronic device after being isolated is effectively isolated from the external severe environment, the problem that the service life of the power electronic device is reduced due to the failure of the power electronic device caused by the severe environment is solved. However, it is also necessary to perform real-time monitoring for the power electronic device to perform timely pre-determination and alarm for equipment failure, so as to improve the reliability of the power electronic device.
For this purpose, the monitoring device in the invention is provided with a temperature sensor, an analysis unit and a communication unit; therefore, temperature data in the isolation box body and gas composition data of the insulating oil can be transmitted to the preset upper computer in real time, the upper computer can use the temperature data and analysis result data received in real time as parameters, and alarm information is generated in real time when the temperature or the electrical performance inside the isolation box body is abnormal according to a preset algorithm, so that equipment faults can be timely alarmed, and the running reliability of the power electronic device is improved.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood and to make the technical means implementable in accordance with the contents of the description, and to make the above and other objects, technical features, and advantages of the present invention more comprehensible, one or more preferred embodiments are described below in detail with reference to the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an on-line monitoring device for a power electronic device according to the present invention;
FIG. 2 is a schematic diagram of an on-line monitoring system for power electronic devices according to the present invention;
fig. 3 is a schematic structural diagram of an online monitoring device for a power electronic device according to the present invention.
Detailed Description
The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited to the specific embodiments.
Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.
Spatially relative terms, such as "below," "lower," "upper," "above," "upper," and the like, may be used herein for ease of description to describe one element or feature's relationship to another element or feature in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the object in use or operation in addition to the orientation depicted in the figures. For example, if the items in the figures are turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the elements or features. Thus, the exemplary term "below" can encompass both an orientation of below and above. The article may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative terms used herein should be interpreted accordingly.
In this document, the terms "first", "second", etc. are used to distinguish two different elements or portions, and are not used to define a particular position or relative relationship. In other words, the terms "first," "second," and the like may also be interchanged with one another in some embodiments.
In order to perform real-time monitoring on a power electronic device in a severe environment, as shown in fig. 1, the present invention provides an online monitoring device for a power electronic device, comprising:
the power electronic device comprises an isolation box body 01 sleeved outside an isolation object 02; the isolation box body 01 is filled with insulating oil; the isolated object 02 includes a power electronic power device and a control drive unit; the isolation box body 01 is provided with an external connection through hole 11 which can be sealed in an insulating way;
the monitoring device includes: a temperature sensor 31 for collecting temperature data of the insulating oil, an analysis unit 32 for analyzing components of dissolved gas in the insulating oil, and a communication unit 33 for transmitting the temperature data and analysis result data to a preset upper computer;
the external connecting line 12 of the isolated object 02 is connected with external equipment through the external connecting through hole 11; the external device includes one of the communication unit, a power supply, a load, and a superior controller, and any combination thereof.
It should be noted that, the application scenario of the online monitoring device in the present invention is for a specific power electronic device; specifically, in order to reduce the failure rate of the power electronic device in severe environments such as high and low temperature, humidity and air pollution and prolong the service life of the power electronic device, the power electronic device comprises an isolation device, namely, the isolation box body 01 is sleeved outside the power electronic device needing isolation, so that the normal operation of the power electronic device is prevented from being influenced by the temperature rise after the power electronic device is isolated, the isolation box body 01 is made of metal, and in addition, insulating oil with excellent heat conduction performance is arranged in the isolation box body 01, so that the overhigh temperature of the power electronic device caused by isolation can be avoided.
Although the power electronic device after being isolated is effectively isolated from the external severe environment, the problem that the service life of the power electronic device is reduced due to the failure of the power electronic device caused by the severe environment is solved. However, it is also necessary to perform real-time monitoring for the power electronic device to perform timely pre-determination and alarm for equipment failure, so as to improve the reliability of the power electronic device.
In the present invention, the object of use of the isolation device (i.e., the isolation object) may be a power electronic device that includes devices such as a frequency converter, SVG, UPFC, a rectifier, a direct-current power supply, and is used in a severe environment such as high temperature, low temperature, humidity, dust, or air pollution; specifically, the isolated object 02 includes a power electronic power device and a control drive unit; in practical application, the power electronic power device and the control driving unit can adopt an IGBT complete set of modules, so that the power electronic power device and the control driving unit are suitable for working after being soaked in the insulating oil 12 for a long time.
The isolation box body 01 and the insulating oil filled in the isolation box body 01 can effectively isolate the isolation object 02, so that the influence of severe environment on the power electronic device is avoided. Next, in the present invention, the isolation box 01 is further provided with an external connection through hole 11 that can be sealed in an insulating manner, so that the external connection line 12 of the isolation object 02 can be connected to external devices such as an external power supply, a load, and a higher-level controller through the external connection through hole 11 by a sealing member such as an insulating bushing.
The monitoring device comprises a temperature sensor 31 for acquiring temperature data of the insulating oil, an analysis unit 32 for analyzing dissolved gas components in the insulating oil, and a communication unit 33 for transmitting the temperature data and analysis result data to a preset upper computer; can be simultaneously with the real-time transmission of the gas composition data of the temperature data in the isolation box 01 and insulating oil to predetermined host computer in like this, can the host computer just can use the temperature data and the analysis result data received in real time as the parameter, come when keeping apart the inside temperature of box 01 or electrical property and take place unusually according to the algorithm of predetermineeing, real-time formation alarm information to can be timely report to the police to equipment trouble, thereby improve the reliability of power electronic device operation.
As shown in fig. 2, the on-line monitoring device for the power electronic device of the present invention can be used in combination with a preset upper computer 03 to form an on-line monitoring system for the power electronic device, wherein temperature data and analysis result data acquired by the on-line monitoring device can be transmitted to the upper computer 03 through a communication unit 33 in real time; the upper computer 03 in the invention is used as data processing and alarm generating equipment, can take temperature data and analysis result data received from the online monitoring device as parameters, and generates a monitoring result of the isolated object 02 according to a preset algorithm. In practical applications, the communication unit 33 of the on-line monitoring device of the present invention and the upper computer 03 can realize data communication in a wired or wireless manner.
Specifically, the monitoring result in the invention at least comprises a normal state and an abnormal state, and when the monitoring result is abnormal, corresponding alarm information can be generated; the preset algorithm may include a preset temperature threshold range, where the preset temperature threshold range is used to determine a corresponding temperature range of the isolated object under normal conditions; that is, when the current temperature of the isolation object 02 estimated from the temperature data obtained by the upper computer 03 exceeds the preset temperature threshold range, alarm information may be generated to prompt that the temperature of the isolation object 02 (i.e., the monitored power electronic device) is abnormal.
In addition, the upper computer 03 can also obtain analysis result data of gas components in the insulating oil in the isolation box body 01, and the upper computer 03 can judge whether electrical performance abnormity such as discharge and local overheating exists in the isolation box body 01 or not in advance through the analysis result data, so that alarm information can be generated when the electrical performance abnormity exists in the isolation box body 01.
In practical applications, the preset algorithm of the present invention may further include a step of estimating the temperature of the isolated object 02, so that the preset algorithm may include:
s11, carrying out fluid heat transfer calculation by taking temperature data as parameters to obtain an estimated temperature value of the isolated object 02;
in the invention, the temperature estimation value of the isolation object 02 can be obtained by calculating the temperature data in the isolation object 02 and the isolation box body 01 by fluid heat transfer calculation software such as Fluent and the like.
And S12, generating alarm information when the temperature estimation value exceeds the preset temperature threshold range.
In the invention, different preset temperature threshold ranges can be set according to different types of the isolation 02 objects, namely, the normal working condition temperature intervals of different power electronic devices are different. When the temperature estimation value of the isolation object 02 exceeds the preset temperature threshold range, alarm information can be generated in real time to ensure that the fault of the power electronic device can be maintained and eliminated in time in order to protect the equipment and guarantee safe production.
Preferably, as shown in fig. 3, the outer wall of the isolation box 01 of the present invention may further include heat dissipation fins 14; in this way, the problem of temperature rise due to the isolation with respect to the isolation object 02 can be further reduced; furthermore, a convex part 15 can be arranged on the inner wall of the isolation box body 01, so that the contact area of the insulating oil and the isolation box body 01 is increased to improve the heat conduction efficiency;
in a high-temperature severe environment or under the condition that the heat productivity of the isolation object 02 is overlarge, in order to maintain the normal working condition of the isolation object 02, further, the isolation device in the invention can also comprise an insulating oil displacement mechanism; the insulating oil displacement mechanism realizes displacement of the insulating oil inside and outside the isolation box body 01 through an oil inlet 16 and an oil outlet 17 which are arranged on the isolation box body 01. Thus, by replacing the insulating oil in the isolation tank 01, the ambient temperature of the isolation object 02 can be rapidly reduced, and the temperature of the isolation object 02 can be prevented from being too high.
Preferably, the insulating oil replacing mechanism in the present invention may further include an automatic control unit (not shown in the drawings); the automatic control unit controls the opening and closing of the insulating oil replacement mechanism according to a control instruction generated by the temperature data. Specifically, after the temperature sensor 31 collects the temperature data, the upper computer generates a monitoring result of the isolated object according to a preset algorithm by using the temperature data as a parameter; when the monitoring result is abnormal, for example, when the monitoring result is that the current temperature of the isolated object is judged to be over standard, corresponding alarm information is generated; a communication unit in the online monitoring device acquires the alarm information; the automatic control unit generates a corresponding control instruction according to the alarm information generated by the temperature data; like this, when just can realizing that the host computer produces alarm information, automatic control unit can be timely starts insulating oil replacement mechanism by oneself and comes to replace the high temperature insulating oil in the isolation box to carry out real-time cooling to isolation object 02, thereby can come to protect power electronic device the very first time, avoid this power electronic device overtemperature damage.
Preferably, a guide pipe can be arranged in the isolation box body 01; the guide pipe comprises a conveying part 18 and a drainage part 19; one end of the conveying part 18 is communicated with the oil outlet 16, and the drainage part 19 is arranged at a position close to the isolation object 02; different locations of the drain 19 include a plurality of drainage holes. When the temperature of the isolation object 02 is too high, the temperature of the insulating oil closest to the isolation object 02 is the highest, and the replacement of the high-temperature insulating oil can be accelerated through the flow guide pipe, so that the speed and the efficiency of temperature control on the isolation object 02 are accelerated.
In order to make the replacement speed of the insulating oil in the vicinity of each position of the isolation object 02 uniform, in practical application, the distribution mode of the plurality of drainage holes may be further set as follows: drainage holes in the drainage portion 19 near one end of the delivery portion 18 are distributed less densely than at the other end. Specifically, if the densities of the plurality of drainage holes are the same, when the insulating oil is pumped out through the conveying part 18, the negative pressure of the drainage holes close to the conveying part 18 is large, and further, the flow rate is high, and the flow rate of the drainage holes far away from the conveying part 18 is low, so that the positions of the isolation object 02 cannot be synchronously cooled. The distribution density of the drainage holes close to one end of the conveying part 18 can be set to be smaller than that of the drainage holes at the other end, so that the replacement speed of the insulating oil near each position of the isolation object 02 can be consistent, and the cooling effect on the isolation object 02 is improved.
Furthermore, when the volume of the isolation object is larger, the drainage part can be designed to comprise a plurality of branches, so that the temperature of the isolation object can be controlled more uniformly and efficiently.
The application environment of the invention is severe, for example, in a humid environment, after moisture enters the isolation box body, the electric fields of unstable high-frequency pulse and the like can cause the insulating oil to generate impurities in the isolation box body due to electric power decomposition, thereby causing the reduction of the insulating resistance and the reduction of the insulating strength, further reducing the breakdown voltage of the insulating oil, and further leading the working performance of an isolation object to be reduced; for this purpose, in the present invention, an oil filter (not shown) may be further provided to filter the exchanged insulating oil; specifically, the oil filter is communicated with the insulating oil displacement mechanism, so that the insulating oil displaced by the isolation box body can be effectively filtered.
In summary, the application scenario of the online monitoring device in the present invention is for a specific power electronic device; specifically, in order to reduce the failure rate of the power electronic device in severe environments such as high and low temperature, humidity and air pollution and prolong the service life of the power electronic device, the power electronic device comprises an isolation device, namely, an isolation box body is sleeved outside the power electronic device needing isolation, so that the normal operation of the power electronic device is prevented from being influenced by the temperature rise after the power electronic device is isolated, the isolation box body is made of metal, and in addition, insulating oil with excellent heat conduction performance is arranged in the isolation box body, so that the over-high temperature of the power electronic device caused by isolation can be avoided.
Although the power electronic device after being isolated is effectively isolated from the external severe environment, the problem that the service life of the power electronic device is reduced due to the failure of the power electronic device caused by the severe environment is solved. However, it is also necessary to perform real-time monitoring for the power electronic device to perform timely pre-determination and alarm for equipment failure, so as to improve the reliability of the power electronic device.
For this purpose, the monitoring device in the invention is provided with a temperature sensor, an analysis unit and a communication unit; therefore, temperature data in the isolation box body and gas composition data of the insulating oil can be transmitted to the preset upper computer in real time, the upper computer can use the temperature data and analysis result data received in real time as parameters, and alarm information is generated in real time when the temperature or the electrical performance inside the isolation box body is abnormal according to a preset algorithm, so that equipment faults can be timely alarmed, and the running reliability of the power electronic device is improved.
The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. Any simple modifications, equivalent changes and modifications made to the above exemplary embodiments shall fall within the scope of the present invention.
Claims (10)
1. An on-line monitoring device for a power electronic device, comprising:
the power electronic device comprises an isolation box body sleeved outside an isolation object; insulating oil is filled in the isolation box body; the isolated object comprises a power electronic power device and a control driving unit; the isolation box body is provided with an external connection through hole capable of being sealed in an insulating way;
the monitoring device includes: the system comprises a temperature sensor for collecting temperature data of the insulating oil, an analysis unit for analyzing components of dissolved gas in the insulating oil, and a communication unit for transmitting the temperature data and analysis result data to a preset upper computer;
the external connecting line of the isolated object is connected with external equipment through the external connection through hole; the external device includes one of the communication unit, a power supply, a load, and a superior controller, and any combination thereof.
2. The on-line monitoring device for power electronic devices according to claim 1,
the outer wall of the isolation box body also comprises radiating fins.
3. The on-line monitoring device for a power electronic device according to claim 1, further comprising an insulating oil displacement mechanism;
and the insulating oil displacement mechanism realizes displacement of the insulating oil inside and outside the isolation box body through the oil inlet and the oil outlet which are arranged on the isolation box body.
4. The on-line monitoring device for power electronic devices according to claim 3, further comprising an automatic control unit;
and the automatic control unit controls the opening and closing of the insulating oil displacement mechanism according to a control instruction generated by the temperature data.
5. The on-line monitoring device for the power electronic device according to claim 3, further comprising an oil filter;
the oil filter is communicated with the insulating oil displacement mechanism and is used for filtering the insulating oil displaced from the isolation box body.
6. The on-line monitoring device for the power electronic device as claimed in claim 4, wherein a flow guide pipe is further arranged in the isolation box;
the guide pipe comprises a conveying part and a drainage part; one end of the conveying part is communicated with the oil outlet, and the drainage part is arranged at a position close to the isolation object; different positions of the drainage part comprise a plurality of drainage holes.
7. The on-line monitoring device for power electronic devices according to claim 1,
and the power electronic power device and the control driving unit adopt an IGBT complete module.
8. An on-line monitoring system for a power electronic device, characterized by comprising the on-line monitoring device as claimed in any one of claims 1 to 7, and an upper computer;
and the upper computer is used for generating a monitoring result of the isolated object according to a preset algorithm by taking the temperature data and the analysis result data received from the online monitoring device as parameters.
9. A monitoring system for a power electronic device according to claim 8, the preset algorithm comprising:
performing fluid heat transfer calculation by taking the temperature data as a parameter to obtain an estimated temperature value of the isolated object;
and generating alarm information when the temperature estimation value exceeds a preset temperature threshold range.
10. The on-line monitoring system for power electronic devices of claim 9, the preset algorithm comprising:
judging whether discharge or/and local overheating occurs in the isolation box body according to the analysis result data;
and if so, generating alarm information.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910582815.8A CN112240967A (en) | 2019-07-01 | 2019-07-01 | On-line monitoring device and system for power electronic device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910582815.8A CN112240967A (en) | 2019-07-01 | 2019-07-01 | On-line monitoring device and system for power electronic device |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1289038A (en) * | 1999-09-17 | 2001-03-28 | 通用电气公司 | Intelligent analysts system and method for electric equipment filled with fluid |
| CN102981084A (en) * | 2012-12-07 | 2013-03-20 | 深圳市双合电气股份有限公司 | Comprehensive monitoring system for electric power system transformers |
| CN103149506A (en) * | 2013-01-06 | 2013-06-12 | 华北电力大学 | Power transformer interturn insulation surface bubble partial discharge simulation experimental platform and experimental method |
-
2019
- 2019-07-01 CN CN201910582815.8A patent/CN112240967A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1289038A (en) * | 1999-09-17 | 2001-03-28 | 通用电气公司 | Intelligent analysts system and method for electric equipment filled with fluid |
| CN102981084A (en) * | 2012-12-07 | 2013-03-20 | 深圳市双合电气股份有限公司 | Comprehensive monitoring system for electric power system transformers |
| CN103149506A (en) * | 2013-01-06 | 2013-06-12 | 华北电力大学 | Power transformer interturn insulation surface bubble partial discharge simulation experimental platform and experimental method |
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