CN202548274U - Intelligent ultrahigh frequency partial discharge sensor - Google Patents
Intelligent ultrahigh frequency partial discharge sensor Download PDFInfo
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- CN202548274U CN202548274U CN2012200744408U CN201220074440U CN202548274U CN 202548274 U CN202548274 U CN 202548274U CN 2012200744408 U CN2012200744408 U CN 2012200744408U CN 201220074440 U CN201220074440 U CN 201220074440U CN 202548274 U CN202548274 U CN 202548274U
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Abstract
The utility model provides an intelligent ultrahigh frequency partial discharge sensor, which is used for resolving the problem that in the prior art, the prior ultrahigh frequency partial discharge sensor is bad in versatility and compatibility. The intelligent ultrahigh frequency partial discharge sensor comprises a sensing unit used for obtaining ultrahigh frequency signals; a sampling unit connected with the sensing unit; a processing unit connected with the sampling unit and used for generating partial discharge phase PRPD spectrum data and converting the data format of the PRPD spectrum data into a preset data format; a memory unit connected with the processing unit and used for storing the PRPD spectrum data with the preset data format; and a network adaptive unit connected with the processing unit and used for outputting the PRPD spectrum data. According to the technical scheme, the intelligent ultrahigh frequency partial discharge sensor employs a uniform preset data format and an Ethernet output mode, thereby increasing the versatility and compatibility of the sensor, saving the maintenance cost of a monitoring system, and providing technical support for a transformer station to comprehensively and intelligently monitor and establish a large scale distributed system.
Description
Technical field
The utility model relates to the Electrical Measurement Technology field, particularly a kind of intelligent superfrequency local discharge sensor.
Background technology
Present national intelligent grid Condition Monitoring Technology requires to realize transformer station's comprehensive status monitoring in full station; A large amount of sensors be used under IEC61850 protocol converter equipment integration to the unified monitoring platform of status monitoring, this just needs to realize interchangeability, the compatibility of different manufacturers product.Existing traditional sensor technology objectively can't satisfy the intelligent substation requirements on Construction, and subject matter has system architecture complicated, poor reliability; Interchangeability and compatibility are not high, are difficult to satisfy between the sensor, the interactivity requirement between sensor and the system.
Shelf depreciation is meant a kind of phenomenon in High-Voltage Insulation field; The part of insulation causes discharge because electric field concentrates; But discharge does not run through whole insulation; Produce ultrahigh-frequency signal when shelf depreciation occurring, through the superfrequency electromagnetic wave signal of monitoring 300MHz to 3000MHz, the shelf depreciation situation that just can obtain insulating.At present; Superfrequency (UHF) shelf depreciation online measuring technique is widely used in the detection and the monitoring of the shelf depreciation of high voltage electric equipments such as power transformer, power cable, power switch; It is the important component part of transformer station's status monitoring; Existing superfrequency local discharge sensor, that generally adopts has a dual mode:
First kind of implementation adopts the sensor of traditional mode fully, only has sensing function, just only has energy modality function.Corresponding signal condition (like analog filtering, amplification, conversion), digitizing conversion (A/D), digital filtering, digital conversion etc. all are the discrete assemblies that are independent of the sensing transducer part, on modular design no matter be that function or encapsulation are the states that separates.The major defect of this mode mainly contains: 1, function singleness, only can realize the acquisition of signal function; 2, system constitutes complicacy, and it is high to make up the detection system cost; 3, do not possess communication function, can't make up large-scale distributed system.
Improvement as above-mentioned first kind of implementation; The second kind of implementation that has occurred the superfrequency local discharge sensor in recent years; In this implementation; The superfrequency local discharge sensor has microprocessor, thereby the traditional analog sensor is combined with microprocessor, integrated signal condition (like analog filtering, amplification, conversion), digitizing conversion (A/D), digital filtering, digital signal processing and communication interface.But in this implementation, the interface shape of sensor output terminal, communication modes all adopt from protocols having, between the sensors of various types, do not have interactivity, versatility and poor compatibility between sensor and the system.
The problem that has superfrequency local discharge sensor versatility and poor compatibility in the prior art to this, does not also propose effective solution in the prior art.
The utility model content
The fundamental purpose of the utility model provides a kind of intelligent superfrequency local discharge sensor, with the problem of superfrequency local discharge sensor versatility and poor compatibility in the solution prior art.
The intelligent superfrequency local discharge sensor that the utility model provides comprises: sensing unit, be used to obtain ultrahigh-frequency signal, and with the pulse signal of ultrahigh-frequency signal conditioning for predetermined form; Sampling unit is connected with sensing unit, is used for converting pulse signal into digital signal; Processing unit is connected with sampling unit, is used for obtaining the information of the pulse parameter of digital signal, and utilizes the information of pulse parameter to generate shelf depreciation phase place PRPD spectral data, converts the PRPD spectral data into the preset data form then; Storage unit is connected with processing unit, is used to preserve the PRPD spectral data of preset data form; The Network adaptation unit is connected with storage unit with processing unit, is used for exporting through the Ethernet mode PRPD spectral data of the preset data form that storage unit preserves.
Further, sensing unit comprises: receiving antenna and modulate circuit, and wherein, receiving antenna is used to obtain ultrahigh-frequency signal; Modulate circuit comprises amplifier and wave detector, and wherein, amplifier is connected with receiving antenna, is used for the ultrahigh-frequency signal that obtains is carried out processing and amplifying; Wave detector connects said amplifier, is used for the broad pulse of the conditioning of the ultrahigh-frequency signal after the processing and amplifying for the constant predetermined pulse width of peak value.
Further, the intelligent superfrequency local discharge sensor that the utility model provides comprises the multichannel sensing unit, and wherein one the tunnel is the canaries sensing unit, and all the other are the sensing unit.
Further, sampling unit comprises the multi-channel sampling passage, and the way of sampling channel is not less than the way of sensing unit; Processing unit; The information and the filtering noise that also comprise the pulse parameter of the digital signal that is used for obtaining the multi-channel sampling passage; Information according to the pulse parameter behind the filtering noise generates multichannel PRPD spectral data, then multichannel PRPD spectral data is converted into the parts of preset data form; Storage unit also comprises the parts of the multichannel PRPD spectral data that is used to preserve the preset data form.
Further, processing unit also comprises the parts that are used to send control high-speed door circuit control signal; The superfrequency local discharge sensor also comprises high-speed door circuit and directional coupler, and wherein, the high-speed door circuit is connected with processing unit, is used under the control of control signal, producing demarcating square-wave pulse; Directional coupler is used to produce the identical pulse of demarcation square-wave pulse that two-way and high-speed door circuit produce, and sends pulse to receiving antenna and modulate circuit respectively; Receiving antenna also comprises and being used for according to demarcating the parts that square-wave pulse produces reflected impulse; Modulate circuit also comprises and is used for the parts that send to sampling unit are afterwards handled in reflected impulse and demarcation pulse; Sampling unit comprises that also being used for modulate circuit is handled reflected impulse afterwards is the parts of digital signal with demarcating pulses switch; Processing unit also comprises and is used for judging the parts that receiving antenna and modulate circuit are whether in proper working order according to digital signal.
Further, the intelligent superfrequency local discharge sensor that the utility model provides also comprises power supply and power supply detection module, and wherein, power supply is used for to intelligent superfrequency local discharge sensor power supply; The power supply detection module connects power supply and processing unit, is used for regularly detecting the power work state, when detecting the unusual state of power work, and out-put supply reset signal or output alarm signal.
Further, processing unit also comprises the parts that are used for the PRPD spectral data is converted into preset sensor electronic data sheet TEDS form; Storage unit also comprises the parts that are used for preserving according to the TEDS form PRPD spectral data.
Further, the Network adaptation unit also comprises the parts that are used to realize light-duty IP stack.
According to the technical scheme of the utility model, intelligent superfrequency local discharge sensor comprises: sensing unit, be used to obtain ultrahigh-frequency signal, and with the pulse signal of ultrahigh-frequency signal conditioning for predetermined form; Sampling unit is connected with sensing unit, is used for converting pulse signal into digital signal; Processing unit is connected with sampling unit, is used for obtaining the information of the pulse parameter of digital signal, and utilizes the information of pulse parameter to generate shelf depreciation phase place PRPD spectral data, converts the PRPD spectral data into the preset data form then; Storage unit is connected with processing unit, is used to preserve the PRPD spectral data of preset data form; The Network adaptation unit is connected with storage unit with processing unit, is used for exporting through the Ethernet mode PRPD spectral data of the preset data form that storage unit preserves.The technical scheme that employing the utility model provides is through the unified preset data form and the Ethernet way of output; The versatility and the compatibility of sensor have been improved; Thereby saved the maintenance cost of monitoring system, technical support is provided for transformer station's comprehensive intelligent monitoring makes up high performance large-scale distributed system.The self-checking function of power supply and analog hardware has improved the functional reliability of sensor.
Description of drawings
Figure of description is used to provide the further understanding to the utility model, constitutes the application's a part, and illustrative examples of the utility model and explanation thereof are used to explain the utility model, do not constitute the improper qualification to the utility model.In the accompanying drawings:
Fig. 1 is the synoptic diagram according to the intelligent superfrequency local discharge sensor of the utility model embodiment;
Fig. 2 is the synoptic diagram according to the sensing unit of the intelligent superfrequency local discharge sensor of the utility model embodiment;
Fig. 3 is the process flow diagram according to the processing unit discharge signal acquisition process of the intelligent superfrequency local discharge sensor of the utility model embodiment;
Fig. 4 is the synoptic diagram according to the analog hardware self check of the intelligent superfrequency local discharge sensor of the utility model embodiment.
Embodiment
Need to prove that under the situation of not conflicting, embodiment and the characteristic among the embodiment among the application can make up each other.Below with reference to accompanying drawing and combine embodiment to specify the utility model.
Fig. 1 is the synoptic diagram according to the intelligent superfrequency local discharge sensor of the utility model embodiment; As shown in Figure 1; This intelligence superfrequency local discharge sensor 10 mainly comprises: sensing unit 11, sampling unit 12, processing unit 13, storage unit 14 and Network adaptation unit 15, wherein, sensing unit 11; Be used to obtain ultrahigh-frequency signal, and with the pulse signal of ultrahigh-frequency signal conditioning for predetermined form; Sampling unit 12 is connected with sensing unit 11, is used for converting pulse signal into digital signal; Processing unit 13 is connected with sampling unit 12, is used for obtaining the information of the pulse parameter of digital signal, and utilizes the information of pulse parameter to generate shelf depreciation phase place PRPD spectral data, converts the PRPD spectral data into the preset data form then; Storage unit 14 is connected with processing unit 13, is used for preserving the PRPD spectral data according to the preset data form; Network adaptation unit 15 is connected with storage unit 14 with processing unit 13, is used for exporting through the Ethernet mode PRPD spectral data of the preset data form of storage unit 14 preservations.
Fig. 2 is the sensing unit synoptic diagram according to the intelligent superfrequency local discharge sensor of the utility model embodiment, and is as shown in Figure 2, and sensing unit 11 can comprise: receiving antenna 21 and modulate circuit 23, and wherein, receiving antenna 21 is used to obtain ultrahigh-frequency signal; Modulate circuit comprises amplifier 231 and wave detector 233, and wherein, amplifier 231 connects receiving antenna 21, is used for the ultrahigh-frequency signal that obtains is carried out processing and amplifying; Wave detector 233 connects amplifier 231, is used for the broad pulse of the conditioning of the ultrahigh-frequency signal after the processing and amplifying for the constant predetermined pulse width of peak value.Receiving antenna 21 can adopt existing superfrequency receiving antenna, adopts plane equiangular spiral form.Signal condition broad band uhf amplifier 231 can be chosen to be with the parameter that wave detector 233 is formed modulate circuit 23: bandwidth is 300M～2GHz, and gain amplifier is 40dB, and dynamically input range is-70～13dBm.Wave detector 233 is the broad pulse of predetermined pulse width with the conditioning of the ultrahigh-frequency signal after the processing and amplifying under the situation that keeps original radio frequency pulse signal peak value, pulsewidth can be set at about 100 microseconds, to reduce the SF of sampling unit 12.
12 pairs of sampling units carry out digital sampling through the simulating signals of conditioning, 16 of the ADI that can preferably adopt, the analog-digital converter AD7606 of 8 passages, synchronized sampling, bipolarity input, and the design sampling rate can be set at 200kbps.Sampling unit is connected with processing unit through a serial port, and the data after the conversion directly read through the direct memory access dma mode, can effectively save the hardware resource of processing unit 13.For realizing gathering fast, can be with the metadata cache after the conversion to dynamic RAM SDRAM, to guarantee acquisition precision.
Processor chips in the processing unit 13 can preferably be used the processor chips of embedded microprocessor ADSPBF518DSP; Accomplish the synchronous acquisition control of partial-discharge ultrahigh-frequency rectified signal, the analyzing and processing of local discharge signal; Comprise that pulse parameter such as amplitude are put in office, discharge phase extracts and the generation of discharge PRPD spectrum data; And convert the PRPD spectrum data of finishing dealing with into predetermined data format, be stored in the storage unit 14.The ADSPBF518DSP processor has the clock rate up to 400MHz (800MMACS), the RAM of built-in 116kB.Simultaneity factor has adopted the SDRAM of 16 64MB, for the buffer memory of data provides the degree of depth, also for the operation of office's discharge signal handling procedure the space is provided simultaneously.
Above sensing unit 11, sampling unit 12, processing unit 13, storage unit 14 and Network adaptation unit 15; Except that antenna; All can be integrated on the same high-frequency circuit board; The input of this high-frequency circuit receiving antenna can be adopted the SMAF terminal, and the signal output port of Network adaptation unit can adopt the RJ45 interface, also can adopt the interface shape of optical fiber network interface.
The intelligent superfrequency local discharge sensor that present embodiment provides can comprise multichannel sensing unit 11, and wherein one the tunnel is the canaries sensing unit, and all the other are the ultrahigh-frequency signal sensing unit of shelf depreciation.
Sampling unit also can comprise the multi-channel sampling passage; The way of sampling channel is not less than the way of sensing unit; As adopt the sampling A of AD7606; Then at most can external 8 road sensing units, the one tunnel is defaulted as the canaries passage, all the other 7 tunnel signalling channels for the monitoring partial-discharge ultrahigh-frequency signal; Processing unit 13; The information and the filtering noise that also comprise the pulse parameter of the digital signal that is used for obtaining the multi-channel sampling passage; Generate the data of multichannel PRPD spectrogram according to the information of the pulse parameter behind the filtering noise, then multichannel PRPD spectral data is converted into the parts of preset data mode; Storage unit 14 also comprises the parts that are used for preserving according to preset data mode multichannel PRPD spectral data.The step that concrete filtering noise produces can compare for each passage pulse of extracting and the pulse that noise channel extracts, and the interference that promptly is judged to be space environment of the impulsive synchronization of every and noise channel is also removed.
Fig. 3 is the process flow diagram according to the processing unit discharge signal acquisition process of the intelligent superfrequency local discharge sensor of the utility model embodiment; As shown in Figure 3, sampling unit 11 starts the synchronous AD conversion of a plurality of passages through the rising edge that detects the operating frequency phase trigger pip, and each acquisition time is not less than 1s.For preventing that internal memory from overflowing, beginning data processing thread carries out DISCHARGE PULSES EXTRACTION with each channel data, record peak value and time behind the collection 20ms; Pulse and noise channel that each passage extracts compare synchronously, and the interference that promptly is judged to be space environment of the impulsive synchronization of every and noise channel is also removed; Carry out phase place normalization then, extract PRPD chromatogram characteristic amount, carry out statistical stacking, gather and store behind the full 1s and through network output statistics spectral data with the data of a last cycle.
Fig. 4 is the synoptic diagram according to the analog hardware self check of the intelligent superfrequency local discharge sensor of the utility model embodiment; As shown in Figure 4, processing unit 13 also comprises the parts that are used to send the control signal of controlling high-speed door circuit 43; The intelligent superfrequency local discharge sensor that present embodiment provides also comprises high-speed door circuit 43 and directional coupler 41, and wherein, high-speed door circuit 43 is connected with processing unit 13, is used under the control of control signal, producing demarcating square-wave pulse; Directional coupler 41 is used to produce the identical pulse of demarcation square-wave pulse that two-way and high-speed door circuit 43 produce, and sends pulse to receiving antenna 21 and modulate circuit 23 respectively; Receiving antenna 21 also comprises and being used for according to demarcating the parts that square-wave pulse generates reflected impulse; Modulate circuit 23 also comprises and is used for the parts that send to sampling unit 12 are afterwards handled in reflected impulse and demarcation pulse; Sampling unit 12 comprises that also being used for modulate circuit 232 is handled reflected impulse afterwards is the parts of digital signal with demarcating pulses switch; Processing unit 13 also comprises and is used for judging the parts that receiving antenna 21 and modulate circuit 23 are whether in proper working order according to digital signal.
The impedance of receiving antenna 21 is Z
1, the impedance of modulate circuit and cabling is Z
2, high-speed door circuit 43 is after sending steep square-wave pulse under the control of processing unit 13, and processing unit 13 will receive that 2 are demarcated pulse, and one is the steep square-wave pulse behind modulate circuit, and pulse height is V
1Second is the pulse of passing through modulate circuit again through the receiving antenna reflection, and pulse height is V
2If the modulate circuit function is normal, then V
1Should be a constant value; V
2Amplitude should be approximately
If V
1Or V
2Fall surpasses certain amplitude, and processing unit 13 just can judge that intelligent superfrequency local discharge sensor mimic channel gain descends, thus the output failure alarm signal.
The intelligent superfrequency local discharge sensor that present embodiment provides can also comprise power supply and power supply detection module (not shown), and wherein, power supply is used for to intelligent superfrequency local discharge sensor power supply; The power supply detection module is used for regularly detecting the power work state, when detecting the unusual state of power work, and out-put supply reset signal or output alarm signal.The unusual state of power work comprises overtension or low excessively; Electric current is excessive, and the power work temperature is high excessively, occur above unusual after; The power supply detection module can send the power reset signal; Restart power supply, abnormity of power supply is not eliminated after restarting, and the power supply detection module can output alarm signal and powered-down.
The intelligent superfrequency local discharge sensor of present embodiment has the program house dog and the communication self-checking function guarantees functional reliability.The program house dog is through adding a running mark in the master routine circulation; Every circulation primary should be upgraded once by sign, does not upgrade if this sign surpasses certain hour, shows that then program is normal; Otherwise show program fleet, overflow or get into endless loop, then reset routine.Whether the communication self check is normal through communication detection communication connection, and whether the communication response is normal.
Table 1
| TEDS attribute/method | Value | Explanation |
| Manufacturer | North China Electric Power University | - |
| SensModel | UHF?LogSpiral | - |
| VersionNum | 1 | Version |
| TEDSLen | 61938 | Byte |
| ChanNum | 8 | Port number |
| UserName | String*10 | User's name |
| DevInfo | String*30 | Device description |
| SetupInfo | String*40 | Mount message |
| WriteSetupTime | 20 | ms |
| ReadSetupTime | 10 | ms |
| SampPeriod | 100 | ms |
| MaxCommRate | 3M | bps |
| … | … | … |
Above-mentioned TEDS designs with the form of the regulation that meets the IEEE1451 standard, thereby the intelligent superfrequency local discharge sensor of present embodiment can satisfy the unified interface standard of IEEE1451, has further improved versatility and compatibility.
More than be that the concrete chip type that occurs in the instance is not unique scheme; Do not constitute qualification to the utility model embodiment yet, above chip comprise sampling A, processor chips, storage chip and network chip all can other kind and model replace.
According to the technical scheme of the utility model, intelligent superfrequency local discharge sensor comprises: sensing unit, be used to obtain ultrahigh-frequency signal, and with the pulse signal of ultrahigh-frequency signal conditioning for predetermined form; Sampling unit is connected with sensing unit, is used for converting pulse signal into digital signal; Processing unit is connected with sampling unit, is used for obtaining the information of the pulse parameter of digital signal, and utilizes the information of pulse parameter to generate shelf depreciation phase place PRPD spectral data, converts the PRPD spectral data into preset data mode then; Storage unit is connected with processing unit, is used for preserving the PRPD spectral data according to preset data mode; The Network adaptation unit; Be connected with storage unit with processing unit; Be used for exporting the data of the PRPD spectrogram of the preset data mode that storage unit preserves,, improved the versatility and the compatibility of sensor through the unified preset data form and the Ethernet way of output through the Ethernet mode; Thereby saved the maintenance cost of monitoring system, technical support is provided for transformer station's integrative function monitoring makes up high performance large-scale distributed system.The self-checking function of power supply and analog hardware has improved the functional reliability of sensor.
The preferred embodiment that the above is merely the utility model is not limited to the utility model, and for a person skilled in the art, the utility model can have various changes and variation.All within the spirit and principle of the utility model, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the utility model.
Claims (8)
1. an intelligent superfrequency local discharge sensor is characterized in that, comprising:
Sensing unit is used to obtain ultrahigh-frequency signal, and with the pulse signal of said ultrahigh-frequency signal conditioning for predetermined form;
Sampling unit is connected with said sensing unit, is used for converting said pulse signal into digital signal;
Processing unit; Be connected with said sampling unit; Be used for obtaining the information of the pulse parameter of said digital signal, and utilize the information of said pulse parameter to generate shelf depreciation phase place PRPD spectral data, convert said PRPD spectral data into the preset data form then;
Storage unit is connected with said processing unit, is used to preserve the said PRPD spectral data of said preset data form;
The Network adaptation unit is connected with said storage unit with said processing unit, is used for exporting through the Ethernet mode the said PRPD spectral data of the preset data form that said storage unit preserves.
2. intelligent superfrequency local discharge sensor according to claim 1 is characterized in that said sensing unit comprises:
Receiving antenna and modulate circuit, wherein,
Said receiving antenna is used to obtain said ultrahigh-frequency signal;
Said modulate circuit comprises amplifier and wave detector, wherein,
Said amplifier is connected with said receiving antenna, is used for the said ultrahigh-frequency signal that obtains is carried out processing and amplifying;
Said wave detector is connected with said amplifier, is used for the broad pulse of the conditioning of the ultrahigh-frequency signal after the processing and amplifying for the constant predetermined pulse width of peak value.
3. intelligent superfrequency local discharge sensor according to claim 2 is characterized in that, comprises the said sensing unit of multichannel, and wherein one the tunnel is the canaries sensing unit, and all the other are the sensing unit.
4. intelligent superfrequency local discharge sensor according to claim 3 is characterized in that,
Said sampling unit comprises the multi-channel sampling passage, and the way of said sampling channel is not less than the way of said sensing unit;
Said processing unit; The information and the filtering noise that also comprise the pulse parameter of the digital signal that is used for obtaining said multi-channel sampling passage; Information according to the pulse parameter behind the filtering noise generates multichannel PRPD spectral data, then said multichannel PRPD spectral data is converted into the parts of preset data form;
Said storage unit also comprises the parts of the said multichannel PRPD spectral data that is used to preserve said preset data form.
5. intelligent superfrequency local discharge sensor according to claim 2 is characterized in that,
Said processing unit also comprises the parts that are used to send control high-speed door circuit control signal;
Said superfrequency local discharge sensor also comprises high-speed door circuit and directional coupler, wherein,
Said high-speed door circuit is connected with said processing unit, is used under the control of said control signal, producing demarcating square-wave pulse;
Said directional coupler; Be connected with said sensing unit with said high-speed door circuit and be connected; Be used to produce the identical pulse of demarcation square-wave pulse that two-way and said high-speed door circuit produce, and send said pulse to said receiving antenna and said modulate circuit respectively;
Said receiving antenna also comprises the parts that are used for forming according to said demarcation square-wave pulse reflected impulse;
Said modulate circuit also comprises and is used for said reflected impulse and said demarcation pulse are handled the parts that send to said sampling unit afterwards;
Said sampling unit also comprises the parts that said reflected impulse and the said demarcation pulses switch after being used for said modulate circuit handled is digital signal;
Said processing unit also comprises and is used for judging the parts that said receiving antenna and said modulate circuit are whether in proper working order according to said digital signal.
6. intelligent superfrequency local discharge sensor according to claim 1 is characterized in that, also comprises power supply and power supply detection module, wherein,
Said power supply is used for to said intelligent superfrequency local discharge sensor power supply;
Said power supply detection module is connected with said processing unit with said power supply, is used for regularly detecting the power work state, when detecting the unusual state of power work, and out-put supply reset signal or output alarm signal.
7. according to each described intelligent superfrequency local discharge sensor in the claim 1 to 6, it is characterized in that,
Said processing unit also comprises the parts that are used for said PRPD spectral data is converted into preset sensor electronic data sheet TEDS form;
Said storage unit also comprises the parts that are used for preserving according to said TEDS form said PRPD spectral data.
8. according to each described intelligent superfrequency local discharge sensor in the claim 1 to 6, it is characterized in that said Network adaptation unit also comprises the parts that are used to realize light-duty IP stack.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102608502A (en) * | 2012-03-01 | 2012-07-25 | 华北电力大学 | Intelligent ultrahigh frequency local charge sensor |
| CN105116306A (en) * | 2015-09-09 | 2015-12-02 | 国家电网公司 | Acquisition method and device of substation partial discharge live detection electromagnetic interference |
-
2012
- 2012-03-01 CN CN2012200744408U patent/CN202548274U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102608502A (en) * | 2012-03-01 | 2012-07-25 | 华北电力大学 | Intelligent ultrahigh frequency local charge sensor |
| CN105116306A (en) * | 2015-09-09 | 2015-12-02 | 国家电网公司 | Acquisition method and device of substation partial discharge live detection electromagnetic interference |
| CN105116306B (en) * | 2015-09-09 | 2018-05-15 | 国家电网公司 | The acquisition method and device of substation's partial discharge electrification detection electromagnetic interference |
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Granted publication date: 20121121 Termination date: 20130301 |