CN201892710U - Monitoring system of power transformer - Google Patents
Monitoring system of power transformer Download PDFInfo
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- CN201892710U CN201892710U CN2010205399903U CN201020539990U CN201892710U CN 201892710 U CN201892710 U CN 201892710U CN 2010205399903 U CN2010205399903 U CN 2010205399903U CN 201020539990 U CN201020539990 U CN 201020539990U CN 201892710 U CN201892710 U CN 201892710U
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- power transformer
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Abstract
The utility model discloses monitoring system of a power transformer, which comprises a power transformer, an operational parameter monitoring unit, a high-voltage signal acquisition unit, a medium-voltage signal acquisition unit and a data storage and display unit, wherein the operational parameter monitoring unit is used for adjusting working signal of the power transformer and figuring out effective information data; the high-voltage signal acquisition unit and the medium-voltage signal acquisition unit are used for acquiring high-voltage working signals and medium-voltage working signals of the power transformer through various sensors and providing valid field operation signals of the power transformer for the operational parameter monitoring unit; and the data storage and display unit is used for storing calculated and processed valid data of various working signals of the power transformer by the operational parameter monitoring unit and performing real-time display. The monitoring system has abundant functions, simple design and modular structure, can monitor parameters such as the voltage, the effective value of current, the power factor, the dielectric loss angle, the harmonic wave and the harmonic distortion rate and offers help for mastering real-time working state of the power transformer and guaranteeing safe and reliable operation of the power transformer.
Description
Technical field
The utility model relates to a kind of monitoring system, it is complete particularly to relate to a kind of monitoring function, easy to use, modular construction, can monitor working voltage, the load current effective value of power transformer, power factor, dielectric loss angle, harmonic wave, a kind of power transformer monitoring system of multiple parameter such as percent harmonic distortion.
Background technology
China's electric power industry development is very fast, found the state over 50 years, be that the generating set installation total volume in the whole nation or generated energy are all with the annual growth high speed development more than 10%, the capacity of all kinds of power transformers generally is about 7～9 times of generating equipment capacity, therefore also just need a large amount of power transformers, owing to many-sided reason, the accident rate of domestic power transformer is still than higher.With the whole nation statistics to the above system of 220kV in 2009 was example, the accident of the unplanned idle time＞1000h of power transformer just has 5 times, far above developed country, it is annual that totally unplanned idle time reaches 20933 hours, account for whole unplanned more than 70% of T.T. of stoppage in transit, as seen the unplanned idle time that causes because of power transformer very many, the power transformer accident has become one of principal element that influences the electrical network reliability service.
Therefore the operational reliability that improves power transformer is very important, realize that this purpose needs to consider: new technology how to utilize the information age, in time understand operating truth, make the best use of everything to reach, this also will help improving the automaticity of power supply reliability and management.
What carry out for operating power transformer China is the method that regularly has a power failure and carry out preventive trial (prerun), and this method is being found defective, improved aspect such as operational reliability and got effect preferably.But along with the raising of power transformer electric pressure, the increase of separate unit capacity, its shortcoming comes out gradually, mainly comprises two aspects, and the cycle of one side prerun is longer, if defective is difficult to be found in time with developing between twice test soon; The trial voltage that applies during prerun is often far below working voltage on the other hand, is difficult to the defective in the discovering device delicately, the method for the test that has a power failure simultaneously for grasp the power transformer duty to the influence of the quality of power supply without any meaning.
Therefore, carry out the charged on-line monitoring of power transformer, can monitor voltage, current effective value under the power transformer running status at any time, power factor, dielectric loss angle, harmonic wave, key parameters such as percent harmonic distortion are in time understood status of equipment, thereby improve reliability of operation.
Based on above principle, the utility model proposes a kind of feature richness, simplicity of design, modular construction can be monitored working voltage, the load current effective value of power transformer, power factor, dielectric loss angle, harmonic wave, the isoparametric a kind of power transformer monitoring system of percent harmonic distortion, for grasping power transformer real-time working state, guarantee power transformer safe and reliable operation is offered help.
Summary of the invention
Technical problem to be solved in the utility model is, a kind of feature richness has been proposed, simplicity of design, modular construction, can monitor working voltage, the load current effective value of power transformer, power factor, dielectric loss angle, harmonic wave, the isoparametric a kind of power transformer monitoring system of percent harmonic distortion.
The technical scheme that the utility model adopted is: a kind of power transformer monitoring system, include power transformer, and also be provided with: the operational factor monitoring means is used for the working signal of power transformer is adjusted, and calculates effective information data; High-voltage signal collecting unit and middle pressure signal gathering unit are used for the high and medium voltage working signal by multiple sensors collection power transformer, for the operational factor monitoring means provides effective power transformer on-the-spot run signal; Data storage and display unit are used for the valid data of storage running parameter monitoring unit after to the working signal computing of various power transformers, and give real-time demonstration.
Described high-voltage signal collecting unit includes gathers the on high-tension side working voltage of power transformer, load current, end screen electric current and neutral point current, for shielding current sensor and high pressure neutral point current sensor in high-voltage operation voltage sensor, high voltage load current sensor, high pressure end that signal condition and the AD modular converter of operational factor monitoring means provides high pressure real-time working signal.
Working voltage, load current, end screen electric current and the neutral point current of pressing signal gathering unit to include in described to gather the power transformer medium voltage side, for the signal condition and the AD modular converter of operational factor monitoring means provide in during compacting middle pressure working voltage sensor, middle pressure load current sensor, the middle pressure end of working signal shield current sensor and middle pressure neutral point current sensor.
Described operational factor monitoring means includes signal condition and the AD modular converter that the power transformer working signal to the output of high-voltage signal collecting unit and middle pressure signal gathering unit carries out shaping, filtering and conversion; The digital signal of signal condition and the output of AD modular converter is carried out the level adjustment makes it can satisfy the FPGA interface module that the DSP signal processing module requires; Can calculate the operational factor effective value, power factor is calculated, harmonic wave, the isoparametric DSP signal processing module of dielectric loss angle; Supervisory signal is nursed one's health and AD modular converter, FPGA interface module, DSP signal processing module, and coordinates the ARM data management module of its progress of work; Can be the communication interface modules of data upload to data storage and display unit.
Described data storage and display unit include the storer of the power transformer operational data after the unit computing of storage running parameter monitoring; The LCD that shows the power transformer operational data in real time.
A kind of power transformer monitoring system of the present utility model, be to use a plurality of voltage sensors, current sensor is gathered the high-pressure side of power transformer and the working voltage of medium voltage side, load current, end screen electric current, the neutral point current signal, according to these signals that obtain, by conditioning, level translation, in the DSP signal processing module, calculate acquisition voltage, current effective value, power factor, dielectric loss angle, harmonic wave, key parameters such as percent harmonic distortion, by the ARM data management module with parameter orderly be transferred to data storage and display unit, realize the real-time monitoring and the demonstration of power transformer job information.This power transformer monitoring system, diverse in function, the parameter of monitoring is abundant, adopts modular construction, uses convenient and simplely, is to grasp power transformer real-time working state, and guarantee power transformer safe and reliable operation is offered help.
Description of drawings
Fig. 1 is an one-piece construction block diagram of the present utility model;
Fig. 2 is voltage, electric current and neutral point monitoring synoptic diagram;
Fig. 3 is an end screen current monitoring synoptic diagram;
Wherein:
1: power transformer 4: middle pressure signal gathering unit
2: operational factor monitoring means 5: data storage and display unit
3: high-voltage signal collecting unit 11 high-voltage side bus
12 medium voltage side buses 33: high pressure end screen current sensor
21: signal condition and AD modular converter 34: high pressure neutral point current sensor
22:FPGA interface module 41: middle pressure working voltage sensor
23:DSP signal processing module 42: middle pressure load current sensor
24:ARM data management module 43: middle pressure end screen current sensor
25: communication interface modules 44: middle pressure neutral point current sensor
31: high-voltage operation voltage sensor 51: LCD
32: high voltage load current sensor 52: storer
Embodiment
Below in conjunction with embodiment and accompanying drawing a kind of power transformer monitoring system of the present utility model is made detailed explanation.
As shown in Figure 1, a kind of power transformer monitoring system of the present utility model includes power transformer 1, also is provided with: operational factor monitoring means 2 is used for the working signal of power transformer 1 is adjusted, and calculates effective information data; High-voltage signal collecting unit 3 and middle pressure signal gathering unit 4 are used for the high and medium voltage working signal by multiple sensors collection power transformer 1, for operational factor monitoring means 2 provides effective power transformer 1 on-the-spot run signal; Data storage and display unit 5 are used for the valid data after the working signal computing of the 2 pairs of various power transformers 1 in storage running parameter monitoring unit, and give real-time demonstration.
As shown in Figure 1, described high-voltage signal collecting unit 3 includes gathers power transformer 1 on high-tension side working voltage, load current, end screen electric current and neutral point current, for shielding current sensor 33 and high pressure neutral point current sensor 34 in high-voltage operation voltage sensor 31, high voltage load current sensor 32, high pressure end that signal condition and the AD modular converter 21 of operational factor monitoring means 2 provides high pressure real-time working signal.
As shown in Figure 1, working voltage, load current, end screen electric current and the neutral point current of pressing signal gathering unit 4 to include in described to gather power transformer 1 medium voltage side, for the signal condition and the AD modular converter 21 of operational factor monitoring means 2 provide in the last current sensor 43 and the middle pressure neutral point current sensor 44 of shielding of middle pressure working voltage sensor 41, middle pressure load current sensor 42, middle pressures of working signal during compacting.
As shown in Figure 1, described operational factor monitoring means 2 includes signal condition and the AD modular converter 21 that power transformer 1 working signal to 4 outputs of high-voltage signal collecting unit 3 and middle pressure signal gathering unit carries out shaping, filtering and conversion; The digital signal of signal condition and 21 outputs of AD modular converter is carried out the level adjustment makes it can satisfy the FPGA interface module 22 that DSP signal processing module 23 requires; Can calculate the operational factor effective value, power factor is calculated, harmonic wave, the isoparametric DSP signal processing module 23 of dielectric loss angle; Supervisory signal is nursed one's health and AD modular converter 21, FPGA interface module 22, DSP signal processing module 23, and coordinates the ARM data management module 24 of its progress of work; Can be the communication interface modules 25 of data upload to data storage and display unit 5.
As shown in Figure 1, described data storage and display unit 5 include the storer 52 of power transformer 1 operational data after 2 computings of storage running parameter monitoring unit; The LCD 51 that shows power transformer 1 operational data and operational factor in real time.
As shown in Figure 2, high-voltage operation voltage sensor 31 is converted to standard 0-5V voltage with the three-phase line voltage of the high-voltage side bus 11 of power transformer 1, high voltage load current sensor 32 is a standard 0-5V voltage with the triple-phase line current conversion of the high-voltage side bus 11 of power transformer 1, high pressure neutral point current sensor 34 is converted to standard 0-5V voltage with the high-pressure side neutral point current of power transformer 1, and the standard 0-5V voltage signal after the conversion all is input in the signal condition and AD modular converter 21 of operational factor monitoring means 2.
As shown in Figure 2, the middle working voltage sensor 41 of pressing is converted to standard 0-5V voltage with the three-phase line voltage of the medium voltage side bus 12 of power transformer 1, the middle load current sensor 42 of pressing is a standard 0-5V voltage with the triple-phase line current conversion of the medium voltage side bus 12 of power transformer 1, the middle neutral point current sensor 44 of pressing is converted to standard 0-5V voltage with the medium voltage side neutral point current of power transformer 1, and the standard 0-5V voltage signal after the conversion all is input in the signal condition and AD modular converter 21 of operational factor monitoring means 2.
As shown in Figure 3, high pressure end screen current sensor 33 is a standard 0-5V voltage with the end screen current conversion that the bushing TG of power transformer 1 draws, in to press end screen current sensor 43 be standard 0-5V voltage with the end screen current conversion that the medium-tension bushing TM of power transformer 1 draws, the standard 0-5V voltage signal after the conversion all is input in the signal condition and AD modular converter 21 of operational factor monitoring means 2.
A kind of power transformer monitoring system of the present utility model, be high and medium voltage working voltage, load current, end screen electric current, neutral point current signal by detecting power transformer, calculate and obtain voltage, current effective value, power factor, dielectric loss angle, harmonic wave, key parameters such as percent harmonic distortion, the real-time monitoring and the demonstration of existing power transformer job information.This power transformer monitoring system, diverse in function, the parameter of monitoring is abundant, adopts modular construction, uses convenient and simplely, is to grasp power transformer real-time working state, and guarantee power transformer safe and reliable operation is offered help.
Claims (5)
1. a power transformer monitoring system includes power transformer (1), it is characterized in that, also is provided with: operational factor monitoring means (2) is used for the working signal of power transformer (1) is adjusted, and calculates effective information data; High-voltage signal collecting unit (3) and middle pressure signal gathering unit (4), be used for gathering the high and medium voltage working signal of power transformer (1), for operational factor monitoring means (2) provides effective power transformer (1) on-the-spot run signal by multiple sensors; Data storage and display unit (5) are used for the valid data of storage running parameter monitoring unit (2) after to the working signal computing of various power transformers (1), and give real-time demonstration.
2. a kind of power transformer monitoring system according to claim 1, it is characterized in that, described high-voltage signal collecting unit (3) includes high-pressure side working voltage, load current, end screen electric current and the neutral point current of gathering power transformer (1), shields current sensor (33) and high pressure neutral point current sensor (34) for signal condition in the operational factor monitoring means (2) and AD modular converter (21) provide high-voltage operation voltage sensor (31), high voltage load current sensor (32), the high pressure end of high pressure real-time working signal.
3. a kind of power transformer monitoring system according to claim 1, it is characterized in that, medium voltage side working voltage, load current, end screen electric current and the neutral point current of pressing signal gathering unit (4) to include in described to gather power transformer (1), for signal condition in the operational factor monitoring means (2) and AD modular converter (21) provide in the last current sensor (43) and the middle pressure neutral point current sensor (44) of shielding of middle pressure working voltage sensor (41), middle pressure load current sensor (42), middle pressures of working signal during compacting.
4. a kind of power transformer monitoring system according to claim 1, it is characterized in that described operational factor monitoring means (2) includes signal condition and the AD modular converter (21) that the transformer working signal to the output of high-voltage signal collecting unit (3) and middle pressure signal gathering unit (4) carries out shaping, filtering and conversion; The digital signal of signal condition and AD modular converter (21) output is carried out the level adjustment makes it can satisfy the FPGA interface module (22) that DSP signal processing module (23) requires; Can calculate the operational factor effective value, power factor, harmonic wave, the DSP signal processing module (23) of dielectric loss angle; The ARM data management module (24) of management and coordination signal condition and AD modular converter (21), FPGA interface module (22), DSP signal processing module (23) progress of work; Can be the communication interface modules (25) of data upload to data storage and display unit (5).
5. a kind of power transformer monitoring system according to claim 1 is characterized in that, described data storage and display unit (5) include the storer (52) of the transformer operational data after storage running parameter monitoring unit (2) computing; The LCD (51) that shows the transformer operational data in real time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205399903U CN201892710U (en) | 2010-09-25 | 2010-09-25 | Monitoring system of power transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205399903U CN201892710U (en) | 2010-09-25 | 2010-09-25 | Monitoring system of power transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201892710U true CN201892710U (en) | 2011-07-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205399903U Expired - Fee Related CN201892710U (en) | 2010-09-25 | 2010-09-25 | Monitoring system of power transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201892710U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101963639A (en) * | 2010-09-25 | 2011-02-02 | 天津工业大学 | Monitoring system of power transformer |
| CN103091550A (en) * | 2013-01-08 | 2013-05-08 | 北京优科利尔能源设备有限公司 | Synchronous isolation sampling direct-current power meter of wide voltage and large current |
| CN103399230A (en) * | 2013-07-31 | 2013-11-20 | 成都电业局双流供电局 | Power transformer winding online monitoring system |
-
2010
- 2010-09-25 CN CN2010205399903U patent/CN201892710U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101963639A (en) * | 2010-09-25 | 2011-02-02 | 天津工业大学 | Monitoring system of power transformer |
| CN103091550A (en) * | 2013-01-08 | 2013-05-08 | 北京优科利尔能源设备有限公司 | Synchronous isolation sampling direct-current power meter of wide voltage and large current |
| CN103091550B (en) * | 2013-01-08 | 2015-02-11 | 北京优科利尔能源设备有限公司 | Synchronous isolation sampling direct-current power meter of wide voltage and large current |
| CN103399230A (en) * | 2013-07-31 | 2013-11-20 | 成都电业局双流供电局 | Power transformer winding online monitoring system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110706 Termination date: 20110925 |