CN203037812U - Signal modulation system for panoramic partial discharge monitoring of transformer substation - Google Patents
Signal modulation system for panoramic partial discharge monitoring of transformer substation Download PDFInfo
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- CN203037812U CN203037812U CN 201220669782 CN201220669782U CN203037812U CN 203037812 U CN203037812 U CN 203037812U CN 201220669782 CN201220669782 CN 201220669782 CN 201220669782 U CN201220669782 U CN 201220669782U CN 203037812 U CN203037812 U CN 203037812U
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- 238000012544 monitoring process Methods 0.000 title abstract description 11
- 238000006243 chemical reaction Methods 0.000 claims abstract description 7
- 238000012545 processing Methods 0.000 claims abstract description 5
- 238000001514 detection method Methods 0.000 abstract description 6
- 230000003321 amplification Effects 0.000 abstract 3
- 238000003199 nucleic acid amplification method Methods 0.000 abstract 3
- 239000003990 capacitor Substances 0.000 description 6
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- 238000010586 diagram Methods 0.000 description 2
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- 230000005684 electric field Effects 0.000 description 1
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Abstract
The utility model discloses a signal modulation system for the panoramic partial discharge monitoring of a transformer substation. The system comprises an amplification unit, a conversion unit, a detection unit and a master control unit, wherein the amplification unit is used for performing gain adjustment on a monitoring signal, the conversion unit is used for performing power voltage conversion on signal data output by the amplification unit, the detection unit is used for obtaining characteristic values of signal data output by the conversion unit, and the master control unit is used for controlling and processing signal data output by the detection unit. The utility model further discloses a conversion circuit which comprises a logarithmic converter and a detector, wherein the logarithmic converter is used for converting a radio-frequency signal into a voltage signal, and the detector is used for processing a signal output by the logarithmic converter. The system is advantageous in that, partial discharge signals of all electrical devices in the transformer substation can be monitored in real time, and abnormities of peak values, effective values, frequencies and the like can be monitored by obtaining characteristic values of the signals, so that electrical and mechanical faults can be timely detected, and the application range of the panoramic partial discharge monitoring of the transformer substation is greatly expanded.
Description
Technical field
The utility model belongs to the power technology field, is specifically related to a kind ofly put the monitored signal modulating system for panorama office of transformer station, further, relates to a kind of change-over circuit.
Background technology
The panorama monitoring of transformer station generally can be divided into process layer, wall and three levels of station level on logical organization, wherein, the process layer is the faying face of primary equipment and secondary device, and its major function is: carry out the detection of the characteristic parameter of power transmission and transforming equipment, the online detection of state parameter and the tasks such as execution that statistics, operation are controlled; The major function of wall is: carry out the gathering of this interval procedure layer real time data information, data are handled, implemented primary equipment is implemented protection control function, have the effect of forming a connecting link; The station level main task is: the real time data information that gathers full station, operation conditions to full station is carried out quality evaluation, with the scheduling of relevant data direct information or control center and acceptance scheduling or control center's relevant controlling order, send functions such as control command to wall, process layer.
Shelf depreciation is an important symbol of reflection converting station high voltage electrical apparatus state, by the monitoring to the state parameter of the real time status of inner each electrical equipment of reflection transformer station, namely obtain the ultrasonic signal that shelf depreciation that the fault of insulation ag(e)ings such as causing transformer station, cable termination and joint follows and particle collision produce, just can know such as: in the tested electrical equipment shelf depreciation and particle collide and power frequency electric field between information such as relation.Prior art is limited to the application power of the local discharge signal monitoring of each electrical equipment of transformer station, especially can not be intuitively and obtain the information of the associated eigenvalue such as effective value, peak value of local discharge signal in a wide range, thus can't realize panorama partial discharge monitoring fully and effectively to transformer station.
The utility model content
In view of this, the purpose of this utility model is to provide a kind of and puts the monitored signal modulating system for panorama office of transformer station, it can be converted to characteristic value information to the local discharge signal of monitoring and obtain, and has greatly expanded the range of application of transformer station's panorama partial discharge monitoring.
For achieving the above object, the technical solution of the utility model is achieved in that a kind ofly puts the monitored signal modulating system for panorama office of transformer station, it is characterized in that, comprising: the amplifying unit that is used for monitor signal is carried out gain-adjusted; Be used for and carry out the converting unit that power voltage is changed through the signal data of amplifying unit output; Be used for and carry out the detecting unit that eigenwert is obtained through the signal data of converting unit output; And be used for to control the main control unit of processing through the signal data of detecting unit output.
Described amplifying unit comprises amplifier.
Described converting unit comprises logarithmic converter.
Described detecting unit comprises the two-way switch device, and it connects first detecting device and second detecting device.
Described first detecting device is peak detctor; Described second detecting device is the effective value detecting device.
Described main control unit comprises microprocessor, and described microprocessor is connected with mould/number conversion module and input/output bus control module.
Described main control unit also comprises display module, and it is connected with microprocessor.
Further, the utility model also provides a kind of change-over circuit, comprising: the logarithmic converter that is used for radiofrequency signal is converted to voltage signal; And be used for the detecting device that to handle through the signal that logarithmic converter is exported.
The utility model has following beneficial effect with respect to prior art:
The local discharge signal of each electrical equipment such as transformer, reactor in the real-time monitoring substation, by obtaining the information of its eigenwert, can monitor the unusual of peak value, effective value and frequency etc., in time find electric, the mechanical fault of each electrical equipment in the transformer station, assist foundation reliably for the repair based on condition of component work of transformer station provides.
Description of drawings
Fig. 1 is the structure principle chart of putting the monitored signal modulating system for panorama office of transformer station of the present utility model;
Fig. 2 is the structural representation of the specific embodiment of system shown in Figure 1;
Fig. 3 is a kind of physical circuit figure of amplifier embodiment illustrated in fig. 2;
Fig. 4 is a kind of physical circuit figure of peak detctor embodiment illustrated in fig. 2;
Fig. 5 is a kind of physical circuit figure of effective value detecting device embodiment illustrated in fig. 2;
Fig. 6 is the schematic diagram of change-over circuit of the present utility model.
Embodiment
For the ease of the further understanding to utility model, below in conjunction with accompanying drawing embodiment of the present utility model is done detailed description further.
As shown in Figure 1, of the present utility modelly put the monitored signal modulating system for panorama office of transformer station and comprise: the amplifying unit 110 that is used for monitor signal is carried out gain-adjusted; Be used for and carry out the converting unit 120 that power voltage is changed through the signal data of amplifying unit 110 outputs; Be used for and carry out the detecting unit 130 that eigenwert is obtained through the signal data of converting unit 120 outputs; And be used for to control the main control unit 140 of processing through the signal data of detecting unit 130 outputs.
Fig. 2 is the specific embodiment structural representation of system shown in Figure 1, and as shown in the figure, described amplifying unit 110 comprises amplifier 111, and described converting unit 120 comprises logarithmic converter 121.As specific embodiment, logarithmic converter can adopt AD8306, can carry out accurate logarithm (dB) to input signal in 100 dB dynamic ranges and measure (RSSI function), and limiter output able to programme is provided, and operating frequency range is 5 MHz to 400 MHz.
Described detecting unit 130 comprises two-way switch device 131, and it connects first detecting device 135 and second detecting device 136.Described first detecting device 135 is peak detctor; Described second detecting device 136 is the effective value detecting device.
Described main control unit 140 comprises microprocessor 143, and described microprocessor 143 is connected with ADC module 145 and input/output bus control module 147, and input/output bus control module 147 also is connected with DAC module 144.Described main control unit 140 also comprises display module 149, and it is connected with microprocessor 143.As specific embodiment, microprocessor 143 adopts ARM.
Certainly, as the distortion of embodiment, main control unit also can be finished with the FPGA design.
Fig. 3 is a kind of physical circuit figure of amplifier embodiment illustrated in fig. 2, as shown in the figure, the input end in the same way of U1 is used for input signal, reverse input end connects an end of resistance R 13 and the end of R14, the other end ground connection of resistance R 13, the other end of resistance R 14 connects the output terminal of U1, and resistance R 13 and R14 are feedback resistance, forms an amplifying circuit in the same way with U1.As specific embodiment, U1 can adopt AD825.
Fig. 4 is a kind of physical circuit figure of peak detctor embodiment illustrated in fig. 2, as shown in the figure, the input end in the same way of U3 connects the signal output part of upper level, reverse input end connects an end of resistance R 24 and an end of resistance R 25, the other end of R25 is connected with output terminal with the reverse input end of U2, the other end of R24 connects the positive pole of diode D1, the negative pole of D1 connects the output terminal of U3 and the positive pole of diode D2, the negative pole of D2 connects the input end in the same way of U2 and an end of capacitor C 2, the other end ground connection of C2, signal is through after U2 and the U3, and its peak volume is maintained in the capacitor C 2, can export peak value then.As specific embodiment, U2 and U3 can adopt AD825.
Fig. 5 is a kind of physical circuit figure of effective value detecting device embodiment illustrated in fig. 2, as shown in the figure, the p1 pin of U4 connects an end of capacitor C 4 and an end of resistance R 22, COM pin and the UTO pin of the other end of C4 and U4 join, the other end of R22 connects the d1 pin of U1, one end of RMSut pin and capacitor C 9, the other end of C9 is connected with the Cav pin of U4, the p0 pin of U4 connects an end of resistance R 20, the other end of R20 connects an end of capacitor C 10, the other end of C10 connects an end of resistance R 21, and the other end of R21 connects capacitor C 11, and the VIN pin of the other end of C11 and U4 joins, signal is output as the effective value direct current signal by this effective value detecting device.
As specific embodiment, U4 can adopt AD637, and this chip provides the crest factor compensation scheme, allows the crest factor measurement signal to be up to 10, and extra error is less than 1%.Bandwidth allows to measure 200 mV root mean square, frequency is up to the input signal of 600 kHz and the input signal that 1 V root mean square is above, frequency is up to 8 MHz.
Fig. 6 is the schematic diagram of change-over circuit of the present utility model, as shown in the figure, comprising: the logarithmic converter that is used for radiofrequency signal is converted to voltage signal; And be used for the detecting device that to handle through the signal that logarithmic converter is exported.
This circuit can be applied to: with radiofrequency signal performance number (dB) convert to can collecting test dc voltage value, the scope of detection can be determined by the linear working range of logarithmic converter.
The above is preferred embodiment of the present utility model only, is not for limiting protection domain of the present utility model.
Claims (9)
1. one kind is used for panorama office of transformer station and puts the monitored signal modulating system, it is characterized in that, comprising:
Be used for monitor signal is carried out the amplifying unit of gain-adjusted;
Be used for and carry out the converting unit that power voltage is changed through the signal data of amplifying unit output;
Be used for and carry out the detecting unit that eigenwert is obtained through the signal data of converting unit output; And
Be used for to control the main control unit of processing through the signal data of detecting unit output.
2. system according to claim 1, it is characterized in that: described amplifying unit comprises amplifier.
3. system according to claim 2, it is characterized in that: described converting unit comprises logarithmic converter.
4. system according to claim 3, it is characterized in that: described logarithmic converter is AD8306.
5. system according to claim 3, it is characterized in that: described detecting unit comprises the two-way switch device, it connects first detecting device and second detecting device.
6. system according to claim 5 is characterized in that:
Described first detecting device is peak detctor;
Described second detecting device is the effective value detecting device.
7. system according to claim 6, it is characterized in that: described main control unit comprises microprocessor, described microprocessor is connected with mould/number conversion module and input/output bus control module.
8. system according to claim 7, it is characterized in that: described main control unit also comprises display module, it is connected with microprocessor.
9. according to claim 7 or 8 described systems, it is characterized in that: described microprocessor is ARM.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220669782 CN203037812U (en) | 2012-12-07 | 2012-12-07 | Signal modulation system for panoramic partial discharge monitoring of transformer substation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220669782 CN203037812U (en) | 2012-12-07 | 2012-12-07 | Signal modulation system for panoramic partial discharge monitoring of transformer substation |
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| Publication Number | Publication Date |
|---|---|
| CN203037812U true CN203037812U (en) | 2013-07-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220669782 Expired - Fee Related CN203037812U (en) | 2012-12-07 | 2012-12-07 | Signal modulation system for panoramic partial discharge monitoring of transformer substation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102998605A (en) * | 2012-12-07 | 2013-03-27 | 山西省电力公司吕梁供电公司 | System and method for signal modulation for panoramic partial discharge monitoring of transformer substation |
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2012
- 2012-12-07 CN CN 201220669782 patent/CN203037812U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102998605A (en) * | 2012-12-07 | 2013-03-27 | 山西省电力公司吕梁供电公司 | System and method for signal modulation for panoramic partial discharge monitoring of transformer substation |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130703 Termination date: 20181207 |