CN104360252A - Acoustic and electric signal acquiring device and method of multichannel switch cabinet - Google Patents
Acoustic and electric signal acquiring device and method of multichannel switch cabinet Download PDFInfo
- Publication number
- CN104360252A CN104360252A CN201410727334.9A CN201410727334A CN104360252A CN 104360252 A CN104360252 A CN 104360252A CN 201410727334 A CN201410727334 A CN 201410727334A CN 104360252 A CN104360252 A CN 104360252A
- Authority
- CN
- China
- Prior art keywords
- signal
- pin
- resistance
- electric capacity
- node
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 60
- 230000003750 conditioning effect Effects 0.000 claims abstract description 78
- 238000001914 filtration Methods 0.000 claims abstract description 37
- 238000004458 analytical method Methods 0.000 claims abstract description 33
- 238000006243 chemical reaction Methods 0.000 claims abstract description 31
- 238000001514 detection method Methods 0.000 claims abstract description 21
- 238000012544 monitoring process Methods 0.000 claims abstract description 19
- 239000000758 substrate Substances 0.000 claims abstract description 18
- 230000003321 amplification Effects 0.000 claims description 28
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 28
- 230000011664 signaling Effects 0.000 claims description 25
- 230000001052 transient effect Effects 0.000 claims description 18
- 239000000284 extract Substances 0.000 claims description 15
- 238000006073 displacement reaction Methods 0.000 claims description 6
- 238000013404 process transfer Methods 0.000 claims description 6
- 238000005070 sampling Methods 0.000 claims description 6
- 230000005236 sound signal Effects 0.000 claims description 6
- 238000004804 winding Methods 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 4
- 230000035945 sensitivity Effects 0.000 claims description 3
- 229910000679 solder Inorganic materials 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 2
- 239000004973 liquid crystal related substance Substances 0.000 abstract 1
- 230000000712 assembly Effects 0.000 description 3
- 238000000429 assembly Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 230000005284 excitation Effects 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 108091000080 Phosphotransferase Proteins 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 102000020233 phosphotransferase Human genes 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011896 sensitive detection Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
Landscapes
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The invention discloses an acoustic and electric signal acquiring device and method of a multichannel switch cabinet. The acoustic and electric signal acquiring device comprises pairing sensor modules, pairing signal conditioning modules, a main control acquisition analysis circuit module, a power supplying unit, a background, a first substrate and a second substrate, the pairing signal conditioning modules are fixed on the first substrate, the main control acquisition analysis circuit module and the power supply unit are fixed on the second substrate; a local discharge signal of the sensor module switch cabinet is transmitted to the pairing signal conditioning modules, the pairing signal conditioning modules are used for performing filtering, amplifying and peak detecting on the received signal and then performing A/D conversion on the received signal, the converted signal is transmitted to the main control acquisition analysis circuit module, the main control acquisition analysis circuit module is used for performing data operation and extracting local discharge characteristic data, and uploading monitoring data to the background; meanwhile, the main control acquisition analysis circuit module is combined to realize local display of an LCD (Liquid Crystal Display) by virtue of an expansion manner; the problems of inconvenience of discharge detection, large workload, and incapability of realizing remote checking monitoring data of switch equipment are solved.
Description
Technical field
The present invention relates to signal detection apparatus and method, particularly relate to signal supervisory instrument and the method for switchgear.
Background technology
According to two groups of ASSOCIATE STATISTICS, one group of statistical result showed, with 2004 during 1989 ~ 1997 years, in the fault type of below 40.5kV electric pressure switchgear, insulation failure and current-carrying fault (containing obstacle) account for 30% ~ 53%; And another group statistical result showed, during 1992 ~ 2002 years, in switchgear fault type, the ratio of insulation failure and current-carrying fault is up to 66%.Insulation failure in above-mentioned two groups of ASSOCIATE STATISTICS results and current-carrying fault, all closely related with electric discharge phenomena.
At present in all faults of switchgear, there is the fault up to 44% can be detected by Partial Discharge Detecting Technology, wherein, the destructive malfunction of 85% is all relevant with partial discharge phenomenon, therefore, discharge examination implemented to medium voltage switchgear equipment or monitor the probability of malfunction that significantly can reduce controller switching equipment.
Means at present in order to implement discharge examination or monitoring to medium voltage switchgear equipment mainly contain handheld instrument and portable instrument patrols and examines test, but these modes have engendered that cabinet external noise is large in actual applications, ultrasound wave cannot Sensitive Detection good airproof performance switch cubicle and by switch cubicle position limitation (as the back side cannot be detected), the person works's amount problem such as increase greatly;
In addition, TEV sensor and ultrasonic sensor are embedded in switch cabinet bus cabin, isolating switch cabin, cable tank indoor although existing at present, but the result of its monitoring and the data display device also just on cabinet shows, scene is still needed to check, owing to carrying out data upload, therefore inconvenient operations staff is directly at Central Control Room or long-rangely check data.
Summary of the invention
The object of this invention is to provide a kind of multi-way switch cabinet acoustoelectric signal harvester and method, solve that current switching devices discharge examination is inconvenient, workload large, Monitoring Data cannot realize long-range problem of checking.
For solving the problem, a kind of multi-way switch cabinet acoustoelectric signal harvester provided by the invention, comprises into sensor assembly, master control collection analysis circuit module, power supply unit, backstage; Sensor assembly is made up of TEV sensor and ultrasonic sensor; Sensor assembly is embedded in switch cubicle; Power supply unit is used for providing power supply; Backstage is used for that Monitoring Data is carried out electric discharge amplitude, historical data curve is shown; In addition, pair signals conditioning module is also comprised; Pair signals conditioning module is made up of TEV signal conditioning circuit module, ultrasonic signal conditioning circuit module, two AD conversion module; The signal output part of TEV sensor is electrically connected with TEV signal conditioning circuit module by signal input end, and TEV signal conditioning circuit module by signal output terminal is electrically connected with an AD conversion module signal input part; The signal output part of ultrasonic sensor is electrically connected with the signal input part of ultrasonic signal conditioning circuit module, and ultrasonic signal conditioning circuit module signal output part is electrically connected with another AD conversion module signal input part; Two AD conversion module are all electrically connected with the signal input part of master control collection analysis circuit module; The communication interface of master control collection analysis circuit module is connected with backstage.
TEV signal conditioning circuit module comprises TEV signaling multilevel filtering circuit, TEV signal logarithmic amplifying circuit, TEV signal peak detecting circuit; Wherein, TEV signaling multilevel filtering circuit is used for the signal beyond filtering 3-100MHz; The simulating signal of TEV signaling multilevel filtering circuit to the feed-in of TEV sensor processes, and limits its bandwidth, reduces the electromagnetic interference (EMI) of external environment condition and improves the sensitivity of Partial Discharge Detection; TEV signal logarithmic amplifying circuit is used for carrying out Image magnify to transient earth voltage signal, carries out volitional check amplitude to the signal of violent electric discharge phenomena; The local discharge signal that TEV signal peak detecting circuit is used for being as short as the duration ps level processes, and extracts the of paramount importance amplitude signal of Partial Discharge Detection; The setting of TEV signal peak detecting circuit sampling rate is not less than 1MHz.
Ultrasonic signal conditioning circuit module comprises ultrasonic signal pre-amplification circuit, ultrasonic signal bandwidth-limited circuit, ultrasonic signal logarithmic amplification electricity, ultrasonic signal peak-detector circuit; The feeble signal that wherein ultrasonic signal pre-amplification circuit is responsible for for being exported by ultrasonic sensor is amplified, and improves the antijamming capability of signal; The bandwidth of ultrasonic signal bandwidth-limited circuit is 20k to 100k; Ultrasonic signal bandwidth-limited circuit is responsible for the further frequency-selecting of input ultrasonic signal, to suppress spuious background audio signals interference; Output after bandpass filter frequency-selecting is used for logarithmic amplification, detection and analog to digital conversion; Ultrasonic signal logarithmic amplifying circuit is used for carrying out Image magnify to ultrasonic signal, carries out volitional check amplitude to the signal of violent electric discharge phenomena; The local discharge signal that ultrasonic signal peak-detector circuit is used for being as short as the duration ps level processes, and extracts the of paramount importance amplitude signal of Partial Discharge Detection; The setting of ultrasonic signal peak-detector circuit sampling rate is not less than 1MHz.
TEV signal conditioning circuit module is covered by radome; The signal input part of TEV signal conditioning circuit module connects the signal output part of TEV sensor through bnc interface;
Ultrasonic signal conditioning circuit module is covered by radome; The signal input part of ultrasonic signal conditioning circuit module connects the signal output part of ultrasonic sensor through another bnc interface;
The signal output part of two AD conversion module is all electrically connected with FPC seat, and FPC seat is electrically connected through the signal input part of winding displacement with master control collection analysis circuit module.
Pair signals conditioning module is fixing on the first substrate through the first contact pin connector;
Master control collection analysis circuit module, power supply unit are all fixed on second substrate;
Master control acquisition process circuit module comprises mainboard, expansion interface, 485 interfaces and minimum system plate; Mainboard is arranged on second substrate; Expansion interface and 485 interfaces are drawn by mainboard; Minimum system plate is arranged on mainboard, and is connected with mainboard through contact pin connector; The signal input part of minimum system plate is connected with FPC seat through winding displacement.
After minimum system plate receives the switch cubicle discharge signal after from the process of pair signals conditioning module, local discharge characteristic data are extracted to transient earth voltage signal wherein and ultrasonic signal, and with Modbus agreement, Monitoring Data is uploaded eventually through the RS485 interface that mainboard is drawn the backstage supporting this agreement.
LCD display is connected with expansion interface, realizes LCD screen and shows on the spot.
Power supply unit is protected by radome; The output terminal of power supply unit draws the second contact pin connector, and the second contact pin connector is connected through the power input lead of solder joint with master control collection analysis circuit module; The power input of power supply unit is drawn another and is organized the second contact pin connector, and this group second contact pin connector is connected with power interface through another assembly welding point.
TEV signaling multilevel filtering circuit is: series connection access electric capacity C successively between the input end of TEV signaling multilevel filtering circuit to output terminal
5, resistance R
8, inductance L
1and inductance L
2; At TEV signaling multilevel filtering circuit input end and electric capacity C
5between select a node, this node respectively with diode D
1positive pole, diode D
2negative pole connect; Diode D
1negative pole and+5VU voltage between access resistance R
1; Diode D
1with resistance R
1between select a node, between this node and earth terminal, access resistance R
3, resistance R
2with electric capacity C
2connect rear and resistance R
3in parallel; Resistance R
1and select a node between+5VU voltage, access electric capacity C between this node and earth terminal
1; Diode D
2positive pole and-5VU voltage between access resistance R
4; Diode D
2with resistance R
4between select a node, between this node and earth terminal, access resistance R
6, resistance R
5with electric capacity C
4connect rear and resistance R
6in parallel; Resistance R
4and select a node between-5VU voltage, access electric capacity C between this node and earth terminal
1; At electric capacity C
5with resistance R
8between select a node, access resistance R between this node and earth terminal
7; At resistance R
8and inductance L
1between select a node, access resistance R in parallel between this node and earth terminal
9, electric capacity C
6, electric capacity C
7; In inductance L
1and inductance L
2between select a node, access electric capacity C in parallel between this node and earth terminal
8, electric capacity C
9; In inductance L
2and select a node between the output terminal of TEV signaling multilevel filtering circuit, access electric capacity C in parallel between this node and earth terminal
10, electric capacity C
11, resistance R
10;
TEV signal logarithmic amplifying circuit is: access electric capacity C between TEV signal logarithmic amplifying circuit input end and the INHI pin of logarithmic amplifier AD8310
12, electric capacity C
12and select a node between INHI pin, between this node and earth terminal, access resistance R
11; Electric capacity C is accessed between the INLO pin of logarithmic amplifier AD8310 and earth terminal
15; Resistance R is accessed between the INHI pin of logarithmic amplifier AD8310 and INLO pin
13; The COMM pin ground connection of logarithmic amplifier AD8310; Electric capacity C is accessed between the BFIN pin of logarithmic amplifier AD8310 and earth terminal
14; Between+5VT voltage and earth terminal, series connection accesses resistance R successively
12, electric capacity C
13; Resistance R
12with electric capacity C
13between select a node to connect ENBL pin, the Vpos pin of logarithmic amplifier AD8310 simultaneously; Electric capacity C is accessed between the OFLT pin of logarithmic amplifier AD8310 and earth terminal
16; The Vout pin of logarithmic amplifier AD8310 draws the signal output part of wire as TEV signal logarithmic amplifying circuit;
TEV signal peak detecting circuit is: the pin 3 of operational amplifier A D8066 is as signal input part; Resistance R is accessed between the pin 8 of operational amplifier A D8066 and+5VT voltage
14; At pin 8 and the resistance R of operational amplifier A D8066
14between select a node, access electric capacity C between this node and earth terminal
17; Resistance R is accessed between the pin 4 of operational amplifier A D8066 and-5VT voltage
16; Electric capacity C is accessed between the pin 4 of operational amplifier A D8066 and earth terminal
18; The pin two connecting resistance R respectively of operational amplifier A D8066
15one end, diode D
3negative pole, resistance R
15another termination-5VT voltage, diode D
3positive pole connect the pin one of operational amplifier A D8066; The pin one of operational amplifier A D8066 meets diode D
4positive pole, diode D
4negative pole connect the pin 5 of operational amplifier A D8056; At diode D
4negative pole and the pin 5 of operational amplifier A D8056 between select a node, access electric capacity C between this node and earth terminal
19, between this node and-5VT, access resistance R
17; Pin 4 and the pin 8 of operational amplifier A D8056 are all in high-impedance state; The pin 6 adapter pin 7 of operational amplifier A D8056; The pin 7 of operational amplifier A D8056 draws wire, as the signal output part of TEV signal peak detecting circuit.
Ultrasonic signal pre-amplification circuit is: access electric capacity C between the signal input part of ultrasonic signal pre-amplification circuit and the pin 3 of first instrument amplifier INA128
21; The pin two of first instrument amplifier INA128 accesses electric capacity C with connecting successively between earth point
20, R
18; Between the pin two of first instrument amplifier INA128 and pin 3, series connection accesses resistance R successively
19, resistance R
20; At resistance R
19with resistance R
20between select a node ground connection; Resistance R is accessed between the pin one of first instrument amplifier INA128 and pin 8
21; Between+5VU voltage and earth terminal, series connection accesses resistance R successively
22, electric capacity C
22; At resistance R
22with electric capacity C
22between select a node to be connected with the pin 7 of first instrument amplifier INA128; Between-5VU voltage and earth terminal, series connection accesses resistance R successively
23, electric capacity C
23; Resistance R
23with electric capacity C
23between select a node to be connected with the pin 4 of first instrument amplifier INA128; Electric capacity C is accessed between the pin 6 of first instrument amplifier INA128 and the pin 3 of second instrument amplifier INA128
24; At pin 3 and the electric capacity C of second instrument amplifier INA128
24between select a node, access resistance R between this node and earth terminal
24; The pin two of second instrument amplifier INA128 is connected rear ground connection with the pin 7 of first instrument amplifier INA128, the pin 5 of first instrument amplifier INA128, the pin 5 of second instrument amplifier INA128 successively; Resistance R is accessed between the pin one of second instrument amplifier INA128 and pin 8
26; Between+5VU voltage and earth terminal, series connection accesses resistance R successively
25, electric capacity C
25; At resistance R
25with electric capacity C
25between select a node to be connected with the pin 7 of second instrument amplifier INA128; Between-5VU voltage and earth terminal, series connection accesses resistance R successively
27, electric capacity C
26; Resistance R
27with electric capacity C
26between select a node to be connected with the pin 4 of second instrument amplifier INA128; Between the pin two of the pin 6 of second instrument amplifier INA128 and the two amplifier AD8058 of Voltage Feedback, series connection accesses electric capacity C successively
27, resistance R
28, electric capacity C
30; At resistance R
28with electric capacity C
30between select a node, access resistance R between this node and earth terminal
29, connect successively between this node and the pin two of the two amplifier AD8058 of Voltage Feedback simultaneously and access electric capacity C
29, resistance R
31; Electric capacity C
29with resistance R
31between select a node, the pin one of the two amplifier AD8058 of this node and Voltage Feedback is connected; Resistance R is accessed between the pin 3 of the two amplifier AD8058 of Voltage Feedback and earth terminal
30; Between+5VU voltage and earth terminal, series connection accesses resistance R successively
32, electric capacity C
31; At resistance R
32with electric capacity C
31between select the pin 8 of the two amplifier AD8058 of a node and Voltage Feedback to be connected; Between-5VU voltage and earth terminal, series connection accesses resistance R successively
33, electric capacity C
28; At resistance R
33with electric capacity C
28between select the pin 4 of the two amplifier AD8058 of a node and Voltage Feedback to be connected; The pin one of the two amplifier AD8058 of Voltage Feedback draws the signal output part of a wire as ultrasonic signal pre-amplification circuit;
Ultrasonic signal bandwidth-limited circuit is: the signal input part of ultrasonic signal bandwidth-limited circuit is connected successively with output terminal and accessed electric capacity C
32, inductance L
3; At electric capacity C
32and inductance L
3between select a node, access resistance R between this node and earth terminal
34; In inductance L
3and between output terminal, select a node, access resistance R between this node and earth terminal
35;
Ultrasonic signal logarithmic amplifying circuit is: connect successively between ultrasonic signal logarithmic amplifying circuit input end and the INHI pin of logarithmic amplifier AD8310 and access resistance R
36, electric capacity C
33; At resistance R
36with electric capacity C
33between select a node, between this node and earth terminal, access electric capacity C
34; Resistance R is accessed between the INHI pin of logarithmic amplifier AD8310 and INLO pin
38; Electric capacity C is accessed between the INLO pin of logarithmic amplifier AD8310 and earth terminal
38; The COMM pin ground connection of logarithmic amplifier AD8310; Electric capacity C is accessed between the BFIN pin of logarithmic amplifier AD8310 and earth terminal
36; Between+5VT voltage and earth terminal, series connection accesses resistance R successively
37, electric capacity C
35; Resistance R
37with electric capacity C
35between select a node to connect ENBL pin, the Vpos pin of logarithmic amplifier AD8310 simultaneously; Electric capacity C is accessed between the OFLT pin of logarithmic amplifier AD8310 and earth terminal
37; The Vout pin of logarithmic amplifier AD8310 and signal output part are connected successively and are accessed resistance R
39, electric capacity C
40; At resistance R
39with electric capacity C
40between select a node, access electric capacity C between this node and earth terminal
39; At electric capacity C
40and between signal output part, selecting a node, this node and earth terminal access resistance R
40;
Ultrasonic signal peak-detector circuit is: the pin 3 of the two amplifier AD8058 of the first Voltage Feedback is as signal input part; Resistance R is accessed between the pin 8 of the two amplifier AD8058 of the first Voltage Feedback and+5VT voltage
41; At pin 8 and the resistance R of the two amplifier AD8058 of the first Voltage Feedback
41between select a node, access electric capacity C between this node and earth terminal
41; Resistance R is accessed between the pin 4 of the two amplifier AD8058 of the first Voltage Feedback and-5VT voltage
43; Electric capacity C is accessed between the pin 4 of the two amplifier AD8058 of the first Voltage Feedback and earth terminal
42; The pin two connecting resistance R respectively of the two amplifier AD8058 of the first Voltage Feedback
42one end, diode D
6negative pole, resistance R
42another termination-5VT voltage, diode D
6positive pole connect the pin one of the two amplifier AD8058 of the first Voltage Feedback; The pin one of the two amplifier AD8058 of the first Voltage Feedback meets diode D
5positive pole, diode D
5negative pole connect the pin 5 of the two amplifier AD8058 of the second Voltage Feedback; Resistance R
44be connected in parallel on diode D
5two ends; At diode D
5negative pole and the pin 5 of the two amplifier AD8058 of the second Voltage Feedback between select a node, access electric capacity C in parallel between this node with earth terminal
43with resistance R
46, and resistance R is accessed between this node and-5VU voltage
45; Pin 4 and the pin 8 of the two amplifier AD8058 of the second Voltage Feedback are all in high-impedance state; The pin 6 adapter pin 7 of the two amplifier AD8058 of the second Voltage Feedback; The pin 7 of the two amplifier AD8058 of the second Voltage Feedback draws wire, as the signal output part of ultrasonic signal peak-detector circuit.
For solving the problem, the invention provides a kind of multi-way switch cabinet acoustoelectric signal acquisition method, comprising the following steps:
Step S1: sensor assembly receiving key cabinet local discharge signal, i.e. the transient earth voltage signal of the interior local of TEV sensor search switch cabinet; The ultrasonic signal of local in ultrasonic sensor search switch cabinet;
Step S2: pair signals conditioning module receives the signal detected from sensor assembly, that is:
TEV signal conditioning circuit module receives the transient earth voltage signal detected from TEV sensor, and does following process:
Step S21:TEV signaling multilevel filtering circuit carries out filtering process to the received signal, the signal beyond filtering 3-100MHz, and the signal after process is passed to TEV signal logarithmic amplifying circuit;
Step S22:TEV signal logarithmic amplifying circuit carries out Image magnify to transient earth voltage signal, and the signal after amplifying is passed to TEV signal peak detecting circuit;
Step S23:TEV signal peak detecting circuit processes the local discharge signal that the duration is as short as ps level, extracts the of paramount importance amplitude signal of Partial Discharge Detection, and it is fast that the signal after process transfers to master control collection analysis circuit mould after A/D conversion;
Ultrasonic signal conditioning circuit module receives the ultrasonic signal detected from ultrasonic sensor, and does following process:
Step S21 ': the feeble signal that ultrasonic sensor exports is amplified by ultrasonic signal pre-amplification circuit, and the signal after process is reached ultrasonic signal bandwidth-limited circuit;
Step S22 ': ultrasonic signal bandwidth-limited circuit, to the further frequency-selecting of input ultrasonic signal, suppresses spuious background audio signals interference, and the signal after process is reached ultrasonic signal logarithmic amplifying circuit;
Step S23 ': ultrasonic signal logarithmic amplifying circuit carries out Image magnify to ultrasonic signal, and the signal after amplifying is reached ultrasonic signal peak-detector circuit;
Step S24 ': ultrasonic signal peak-detector circuit processes the local discharge signal that the duration is as short as ps level, extract the of paramount importance amplitude signal of Partial Discharge Detection, it is fast that the signal after process transfers to master control collection analysis circuit mould after A/D conversion;
Step S3: master control acquisition process circuit module extracts local discharge characteristic data to transient earth voltage signal and ultrasonic signal, and with Modbus agreement, Monitoring Data is uploaded eventually through the RS485 interface that mainboard is drawn the backstage supporting this agreement;
Step S4: the displaying such as electric discharge amplitude, historical data curve is carried out on backstage.
Adopt multi-way switch cabinet acoustoelectric signal harvester provided by the invention and method, be applied to the local discharge signal detecting multi-way switch cabinet, the pair signals conditioning module that this programme adopts and master control collection analysis circuit module, the acoustoelectric signal that TEV sensor and ultrasonic sensor detect is processed, and upload the data to the relevant monitoring backstage supported according to Modbus stipulations, undertaken Monitoring Data being carried out electric discharge amplitude by backstage, historical data curve is shown, carry out data for operating personnel and check; In addition, this device realizes LCD screen by the extended mode that master control collection analysis circuit mould is fast and shows on the spot, and data are checked at realization scene; Based on above process, multi-way switch cabinet acoustoelectric signal harvester provided by the invention solves that current switching devices discharge examination is inconvenient, workload large, Monitoring Data cannot realize long-range problem of checking; And form the comprehensive on-line monitoring apparatus of complete set, have cost low, simple to operate, monitor integrated, that automaticity is high advantage; In this device, fully take into account the factors such as switch cabinet structure is compact, this apparatus design entirety is a substrate and each module assembled, forms the multi-way switch cabinet acoustoelectric signal harvester of compact size; The instrument department that this device can select to be installed on switch cubicle is indoor, by be arranged on the TEV sensor in different cabin, ultrasonic sensor with the use of, the monitoring to a large amount of partial discharge of switchgear can be realized;
Below in conjunction with accompanying drawing, multi-way switch cabinet acoustoelectric signal harvester and method are described further.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of multi-way switch cabinet acoustoelectric signal harvester of the present invention;
Fig. 2 is the anatomical connectivity vertical view of pair signals conditioning module and master control acquisition process circuit module in the present invention;
Fig. 3 is the left view of the structure of pair signals conditioning module in the present invention;
Fig. 4 is the circuit diagram of TEV signal conditioning circuit module in the present invention;
Fig. 5 is the circuit diagram of ultrasonic signal conditioning circuit module in the present invention
Embodiment
As shown in Figure 1, the present embodiment comprises paired sensor assembly 1, pair signals conditioning module 2, master control collection analysis circuit module 3, power supply unit 4, backstage 5; The present embodiment adopts that three sensor assemblies, 1, three pair signals conditioning module, 2, sensor assembly 1 is corresponding with pair signals conditioning module 2 to work; Local discharge signal in switch cubicle is delivered to pair signals conditioning module 2 by sensor assembly 1, pair signals conditioning module 2 carries out A/D conversion after the signal received is carried out filtering, amplification, peak detection process, signal after conversion delivers to master control collection analysis circuit mould fast 3, carried out data operation process by master control collection analysis circuit mould fast 3, extracted local discharge characteristic data, and Monitoring Data is uploaded to backstage 5, the collection analysis of master control simultaneously circuit mould fast 3 realizes LCD screen by the mode of expansion and shows on the spot;
As shown in Figure 2, composition graphs 3, the present embodiment also comprises first substrate 6 and second substrate 7, and pair signals conditioning module 2 is all arranged on first substrate 6; Master control collection analysis circuit module 3 and power supply unit 4 are all fixed on second substrate 7; Sensor assembly 1 is embedded in (not shown) in switch cubicle; The signal output part of pair signals conditioning module 2 is connected through the signal input part of winding displacement with master control collection analysis circuit module 3; Pair signals conditioning module 2, master control collection analysis circuit module 3 are powered by power supply unit 4.
Below the detailed description to each module:
Sensor assembly 1 is made up of TEV sensor 11 and ultrasonic sensor 12; The present embodiment adopts three sensor assemblies 1 (in other actual conditions, can adopt multiple to Signal-regulated kinase 2 according to specific needs); Three sensor assemblies 1, are embedded in switch cabinet bus cabin, isolating switch cabin, cable tank indoor, respectively for receiving key cabinet local discharge signal.
Pair signals conditioning module 2 is made up of TEV signal conditioning circuit module 21, ultrasonic signal conditioning circuit module 22, two AD conversion module 23; Three pair signals conditioning module 2 are fixed on first substrate 6 through the first contact pin connector 26 side by side; TEV signal conditioning circuit module 21 and ultrasonic signal conditioning circuit module 22 all cover with radome 24, noise decrease and electromagnetic interference (EMI); The signal input part of TEV signal conditioning circuit module 21 and ultrasonic signal conditioning circuit module 22 is all connected to bnc interface 25;
Detectable signal is passed to TEV signal conditioning circuit module 21 through bnc interface 25 by TEV sensor 11; The output termination of TEV signal conditioning circuit module 21 is connected with the signal input part of an AD conversion 23, and the signal output part of this AD conversion 23 is electrically connected with FPC seat 27; By the signal of TEV sensor 11 feed-in after TEV signal conditioning circuit module 21 processes, carry out AD conversion, the signal after conversion is sent to master control acquisition process circuit module 3 through FPC seat 27;
Detectable signal is passed to ultrasonic signal conditioning circuit module 22 through bnc interface 25 by ultrasonic sensor 12; The output termination of ultrasonic signal conditioning circuit module 22 is connected with the signal input part of another AD conversion 23, and the signal output part of this AD conversion 23 is electrically connected with FPC seat 27; By the signal of ultrasonic sensor 12 feed-in after ultrasonic signal conditioning circuit module 22 processes, carry out AD conversion, the signal after conversion is sent to master control acquisition process circuit module 3 through FPC seat 27.
Master control acquisition process circuit module 3 comprises mainboard 31, expansion interface 32,485 interface 33 and minimum system plate 34; Mainboard 31 is arranged on second substrate 7;
Expansion interface 32 and 485 interface 33 is drawn by mainboard 31; Minimum system plate 34 is arranged on mainboard 31, and is connected with mainboard 31 through contact pin connector; The modular design that whole master control acquisition process circuit module 3 adopts minimum system plate 34 discrete with expansion; The signal input part of minimum system plate 34 is connected through the FPC seat 27 that winding displacement and three pair signals conditioning module 2 are respective; Minimum system plate 34 receives the switch cubicle discharge signal after processing from three pair signals conditioning module 2, local discharge characteristic data are extracted for transient earth voltage signal and ultrasonic signal feature design local discharge information extracting method, and Monitoring Data to be uploaded with Modbus agreement and is supported that the displaying such as electric discharge amplitude, historical data curve is carried out, to facilitate long-range data of checking in the backstage 5 of this agreement by the RS485 interface 33 of drawing eventually through mainboard 31; Meanwhile, also realize LCD screen by expansion interface 32 to show on the spot;
Power supply unit 4 is arranged on second substrate 7; The excitation output terminal of power supply unit 4 is drawn the second contact pin connector 43, second contact pin connector 43 and to be gone between with the excitation input end of master control collection analysis circuit module 3 through solder joint 42 and be connected; The power input of power supply unit 4 is drawn another and is organized the second contact pin connector 43, and this group contact pin connector is connected with power interface 41 through another assembly welding point 42; Adopt totally-enclosed encapsulation technology to increase radome to power supply unit 4, ensure that power supply unit 4 reduces the interference of system by external environment.
Below that the circuit layout of TEV signal conditioning circuit module 21 and ultrasonic signal conditioning circuit module 22 is described:
As shown in Figure 4, TEV signal conditioning circuit module 21 comprises TEV signaling multilevel filtering circuit 211, TEV signal logarithmic amplifying circuit 212, TEV signal peak detecting circuit 213; Wherein, the input end of the output termination TEV signal logarithmic amplifying circuit 212 of TEV signaling multilevel filtering circuit 211; The input end 213 of the output termination TEV signal peak detecting circuit of TEV signal logarithmic amplifying circuit 212; Below to TEV signaling multilevel filtering circuit 211, TEV signal logarithmic amplifying circuit 212 and the function of TEV signal peak detecting circuit 213, the description of Butut in the present embodiment:
TEV signaling multilevel filtering circuit 211, for processing the simulating signal of TEV sensor feed-in, limits its bandwidth, to reduce the electromagnetic interference (EMI) of external environment condition to greatest extent and to improve the sensitivity of Partial Discharge Detection, the signal beyond filtering 3-100MHz; TEV signaling multilevel filtering circuit 211 is: series connection access electric capacity C successively between the input end of TEV signaling multilevel filtering circuit 211 to output terminal
5, resistance R
8, inductance L
1and inductance L
2; At TEV signaling multilevel filtering circuit 211 input end and electric capacity C
5between select a node, this node respectively with diode D
1positive pole, diode D
2negative pole connect; Diode D
1negative pole and+5VU voltage between access resistance R
1; Diode D
1with resistance R
1between select a node, between this node and earth terminal, access resistance R
3, resistance R
2with electric capacity C
2connect rear and resistance R
3in parallel; Resistance R
1and select a node between+5VU voltage, access electric capacity C between this node and earth terminal
1; Diode D
2positive pole and-5VU voltage between access resistance R
4; Diode D
2with resistance R
4between select a node, between this node and earth terminal, access resistance R
6, resistance R
5with electric capacity C
4connect rear and resistance R
6in parallel; Resistance R
4and select a node between-5VU voltage, access electric capacity C between this node and earth terminal
1; At electric capacity C
5with resistance R
8between select a node, access resistance R between this node and earth terminal
7; At resistance R
8and inductance L
1between select a node, access resistance R in parallel between this node and earth terminal
9, electric capacity C
6, electric capacity C
7; In inductance L
1and inductance L
2between select a node, access electric capacity C in parallel between this node and earth terminal
8, electric capacity C
9; In inductance L
2and select a node between the output terminal of TEV signaling multilevel filtering circuit 211, access electric capacity C in parallel between this node and earth terminal
10, electric capacity C
11, resistance R
10;
TEV signal logarithmic amplifying circuit 212, for carrying out Image magnify to transient earth voltage signal, simultaneously has again very little gain for large-signal, can the electrical safety in volitional check signal amplitude assurance device loop for violent electric discharge phenomena; TEV signal logarithmic amplifying circuit 212 is: access electric capacity C between TEV signal logarithmic amplifying circuit 212 input end and the INHI pin of logarithmic amplifier AD8310
12, electric capacity C
12and select a node between INHI pin, between this node and earth terminal, access resistance R
11; Electric capacity C is accessed between the INLO pin of logarithmic amplifier AD8310 and earth terminal
15; Resistance R is accessed between the INHI pin of logarithmic amplifier AD8310 and INLO pin
13; The COMM pin ground connection of logarithmic amplifier AD8310; Electric capacity C is accessed between the BFIN pin of logarithmic amplifier AD8310 and earth terminal
14; Between+5VT voltage and earth terminal, series connection accesses resistance R successively
12, electric capacity C
13; Resistance R
12with electric capacity C
13between select a node to connect ENBL pin, the Vpos pin of logarithmic amplifier AD8310 simultaneously; Electric capacity C is accessed between the OFLT pin of logarithmic amplifier AD8310 and earth terminal
16; The Vout pin of logarithmic amplifier AD8310 draws the signal output part of wire as TEV signal logarithmic amplifying circuit 212;
The local discharge signal that TEV signal peak detecting circuit 213 is mainly used in being as short as the duration ps level processes, and extracts the of paramount importance amplitude signal of Partial Discharge Detection, and therefore the setting of TEV signal peak detecting circuit 213 sampling rate is not less than 1MHz; TEV signal peak detecting circuit 213 is: the pin 3 of operational amplifier A D8066 is as signal input part; Resistance R is accessed between the pin 8 of operational amplifier A D8066 and+5VT voltage
14; At pin 8 and the resistance R of operational amplifier A D8066
14between select a node, access electric capacity C between this node and earth terminal
17; Resistance R is accessed between the pin 4 of operational amplifier A D8066 and-5VT voltage
16; Electric capacity C is accessed between the pin 4 of operational amplifier A D8066 and earth terminal
18; The pin two connecting resistance R respectively of operational amplifier A D8066
15one end, diode D
3negative pole, resistance R
15another termination-5VT voltage, diode D
3positive pole connect the pin one of operational amplifier A D8066; The pin one of operational amplifier A D8066 meets diode D
4positive pole, diode D
4negative pole connect the pin 5 of operational amplifier A D8056; At diode D
4negative pole and the pin 5 of operational amplifier A D8056 between select a node, access electric capacity C between this node and earth terminal
19, between this node and-5VT, access resistance R
17; Pin 4 and the pin 8 of operational amplifier A D8056 are all in high-impedance state; The pin 6 adapter pin 7 of operational amplifier A D8056; The pin 7 of operational amplifier A D8056 draws wire, as the signal output part of TEV signal peak detecting circuit 213.
As shown in Figure 5, ultrasonic signal conditioning circuit module 22 comprises ultrasonic signal pre-amplification circuit 221, ultrasonic signal bandwidth-limited circuit 222, ultrasonic signal logarithmic amplification electricity 223, ultrasonic signal peak-detector circuit 224; Wherein ultrasonic signal pre-amplification circuit 221 exports termination ultrasonic signal bandwidth-limited circuit 222 input end; Ultrasonic signal bandwidth-limited circuit 222 exports termination ultrasonic signal logarithmic amplifying circuit 223 input end; Ultrasonic signal logarithmic amplifying circuit 223 exports termination ultrasonic signal peak-detector circuit 224 input end; Below to ultrasonic signal pre-amplification circuit 221, ultrasonic signal bandwidth-limited circuit 222, ultrasonic signal logarithmic amplification electricity 223, the function of ultrasonic signal peak-detector circuit 224, the description of Butut in the present embodiment:
Ultrasonic signal pre-amplification circuit 221 is responsible for the feeble signal that ultrasonic sensor 12 exports being amplified, to improve the antijamming capability of signal; Ultrasonic signal pre-amplification circuit 221 is: access electric capacity C between the signal input part of ultrasonic signal pre-amplification circuit 221 and the pin 3 of first instrument amplifier INA128
21; The pin two of first instrument amplifier INA128 accesses electric capacity C with connecting successively between earth point
20, R
18; Between the pin two of first instrument amplifier INA128 and pin 3, series connection accesses resistance R successively
19, resistance R
20; At resistance R
19with resistance R
20between select a node ground connection; Resistance R is accessed between the pin one of first instrument amplifier INA128 and pin 8
21; Between+5VU voltage and earth terminal, series connection accesses resistance R successively
22, electric capacity C
22; At resistance R
22with electric capacity C
22between select a node to be connected with the pin 7 of first instrument amplifier INA128; Between-5VU voltage and earth terminal, series connection accesses resistance R successively
23, electric capacity C
23; Resistance R
23with electric capacity C
23between select a node to be connected with the pin 4 of first instrument amplifier INA128; Electric capacity C is accessed between the pin 6 of first instrument amplifier INA128 and the pin 3 of second instrument amplifier INA128
24; At pin 3 and the electric capacity C of second instrument amplifier INA128
24between select a node, access resistance R between this node and earth terminal
24; The pin two of second instrument amplifier INA128 is connected rear ground connection with the pin 7 of first instrument amplifier INA128, the pin 5 of first instrument amplifier INA128, the pin 5 of second instrument amplifier INA128 successively; Resistance R is accessed between the pin one of second instrument amplifier INA128 and pin 8
26; Between+5VU voltage and earth terminal, series connection accesses resistance R successively
25, electric capacity C
25; At resistance R
25with electric capacity C
25between select a node to be connected with the pin 7 of second instrument amplifier INA128; Between-5VU voltage and earth terminal, series connection accesses resistance R successively
27, electric capacity C
26; Resistance R
27with electric capacity C
26between select a node to be connected with the pin 4 of second instrument amplifier INA128; Between the pin two of the pin 6 of second instrument amplifier INA128 and the two amplifier AD8058 of Voltage Feedback, series connection accesses electric capacity C successively
27, resistance R
28, electric capacity C
30; At resistance R
28with electric capacity C
30between select a node, access resistance R between this node and earth terminal
29, connect successively between this node and the pin two of the two amplifier AD8058 of Voltage Feedback simultaneously and access electric capacity C
29, resistance R
31; Electric capacity C
29with resistance R
31between select a node, the pin one of the two amplifier AD8058 of this node and Voltage Feedback connects; Resistance R is accessed between the pin 3 of the two amplifier AD8058 of Voltage Feedback and earth terminal
30; Between+5VU voltage and earth terminal, series connection accesses resistance R successively
32, electric capacity C
31; At resistance R
32with electric capacity C
31between select the pin 8 of the two amplifier AD8058 of a node and Voltage Feedback to be connected; Between-5VU voltage and earth terminal, series connection accesses resistance R successively
33, electric capacity C
28; At resistance R
33with electric capacity C
28between select the pin 4 of the two amplifier AD8058 of a node and Voltage Feedback to be connected; The pin one of the two amplifier AD8058 of Voltage Feedback draws the signal output part of a wire as ultrasonic signal pre-amplification circuit 221;
Ultrasonic signal bandwidth-limited circuit 222 is responsible for the further frequency-selecting of input ultrasonic signal, to suppress spuious background audio signals interference; Output after bandpass filter frequency-selecting is used for logarithmic amplification, detection and analog to digital conversion; For switch cubicle, ultrasonic signal that shelf depreciation produces generally is no more than 100kHz, is therefore designed to the bandwidth of 20k to 100k during bandpass filtering; Ultrasonic signal bandwidth-limited circuit 222 is: the signal input part of ultrasonic signal bandwidth-limited circuit 222 is connected successively with output terminal and accessed electric capacity C
32, inductance L
3; At electric capacity C
32and inductance L
3between select a node, access resistance R between this node and earth terminal
34; In inductance L
3and between output terminal, select a node, access resistance R between this node and earth terminal
35;
Ultrasonic signal logarithmic amplifying circuit 223, for carrying out Image magnify to ultrasonic signal, simultaneously has again very little gain for large-signal, can the electrical safety in volitional check signal amplitude assurance device loop for violent electric discharge phenomena; Connect successively between ultrasonic signal logarithmic amplifying circuit 223 input end and the INHI pin of logarithmic amplifier AD8310 and access resistance R
36, electric capacity C
33; At resistance R
36with electric capacity C
33between select a node, between this node and earth terminal, access electric capacity C
34; Resistance R is accessed between the INHI pin of logarithmic amplifier AD8310 and INLO pin
38; Electric capacity C is accessed between the INLO pin of logarithmic amplifier AD8310 and earth terminal
38; The COMM pin ground connection of logarithmic amplifier AD8310; Electric capacity C is accessed between the BFIN pin of logarithmic amplifier AD8310 and earth terminal
36; Between+5VT voltage and earth terminal, series connection accesses resistance R successively
37, electric capacity C
35; Resistance R
37with electric capacity C
35between select a node to connect ENBL pin, the Vpos pin of logarithmic amplifier AD8310 simultaneously; Electric capacity C is accessed between the OFLT pin of logarithmic amplifier AD8310 and earth terminal
37; The Vout pin of logarithmic amplifier AD8310 and signal output part are connected successively and are accessed resistance R
39, electric capacity C
40; At resistance R
39with electric capacity C
40between select a node, access electric capacity C between this node and earth terminal
39; At electric capacity C
40and between signal output part, selecting a node, this node and earth terminal access resistance R
40;
The local discharge signal that ultrasonic signal peak-detector circuit 224 is mainly used in being as short as the duration ps level processes, and extract the of paramount importance amplitude signal of Partial Discharge Detection, therefore the setting of peak-detector circuit sampling rate is not less than 1MHz; Ultrasonic signal peak-detector circuit 224 is: the pin 3 of the two amplifier AD8058 of the first Voltage Feedback is as signal input part; Resistance R is accessed between the pin 8 of the two amplifier AD8058 of the first Voltage Feedback and+5VT voltage
41; At pin 8 and the resistance R of the two amplifier AD8058 of the first Voltage Feedback
41between select a node, access electric capacity C between this node and earth terminal
41; Resistance R is accessed between the pin 4 of the two amplifier AD8058 of the first Voltage Feedback and-5VT voltage
43; Electric capacity C is accessed between the pin 4 of the two amplifier AD8058 of the first Voltage Feedback and earth terminal
42; The pin two connecting resistance R respectively of the two amplifier AD8058 of the first Voltage Feedback
42one end, diode D
6negative pole, resistance R
42another termination-5VT voltage, diode D
36positive pole connect the pin one of the two amplifier AD8058 of the first Voltage Feedback; The pin one of the two amplifier AD8058 of the first Voltage Feedback meets diode D
5positive pole, diode D
5negative pole connect the pin 5 of the two amplifier AD8058 of the second Voltage Feedback; Resistance R
44be connected in parallel on diode D
5two ends; At diode D
5negative pole and the pin 5 of the two amplifier AD8058 of the second Voltage Feedback between select a node, access electric capacity C in parallel between this node with earth terminal
43with resistance R
46, and resistance R is accessed between this node and-5VU voltage
45; Pin 4 and the pin 8 of the two amplifier AD8058 of the second Voltage Feedback are all in high-impedance state; The pin 6 adapter pin 7 of the two amplifier AD8058 of the second Voltage Feedback; The pin 7 of the two amplifier AD8058 of the second Voltage Feedback draws wire, as the signal output part of ultrasonic signal peak-detector circuit 224.
The course of work of the present embodiment comprises the following steps:
Step S1: sensor assembly 1 receiving key cabinet local discharge signal, i.e. the transient earth voltage signal of the interior local of TEV sensor 11 search switch cabinet; The ultrasonic signal of local in ultrasonic sensor 12 search switch cabinet;
Step S2: pair signals conditioning module 2 receives the signal detected from sensor assembly 1, that is:
TEV signal conditioning circuit module 21 receives the transient earth voltage signal detected from TEV sensor 11, and does following process:
Step S21:TEV signaling multilevel filtering circuit 211 carries out filtering process to the received signal, the signal beyond filtering 3-100MHz, and the signal after process is passed to TEV signal logarithmic amplifying circuit 212;
Step S22:TEV signal logarithmic amplifying circuit 212 pairs of transient earth voltage signals carry out Image magnify, and the signal after amplifying is passed to TEV signal peak detecting circuit 213;
The local discharge signal that the step S23:TEV signal peak detecting circuit 213 pairs of duration are as short as ps level processes, extract the of paramount importance amplitude signal of Partial Discharge Detection, the signal after process transfers to master control collection analysis circuit mould fast 3 after A/D conversion;
Ultrasonic signal conditioning circuit module 22 receives the ultrasonic signal detected from ultrasonic sensor 12, and does following process:
Step S21 ': the feeble signal that ultrasonic sensor 12 exports is amplified by ultrasonic signal pre-amplification circuit 221, and the signal after process is reached ultrasonic signal bandwidth-limited circuit 222;
Step S22 ': ultrasonic signal bandwidth-limited circuit 222, to the further frequency-selecting of input ultrasonic signal, suppresses spuious background audio signals interference, and the signal after process is reached ultrasonic signal logarithmic amplifying circuit 223;
Step S23 ': ultrasonic signal logarithmic amplifying circuit 223 pairs of ultrasonic signals carry out Image magnify, and the signal after amplifying is reached ultrasonic signal peak-detector circuit 224;
Step S24 ': the local discharge signal that the ultrasonic signal peak-detector circuit 224 pairs of duration are as short as ps level processes, extract the of paramount importance amplitude signal of Partial Discharge Detection, the signal after process transfers to master control collection analysis circuit mould fast 3 after A/D conversion;
Step S3: master control acquisition process circuit module 3 pairs of transient earth voltage signals and ultrasonic signal extract local discharge characteristic data, and with Modbus agreement, Monitoring Data is uploaded eventually through the RS485 interface 33 that mainboard 31 is drawn the backstage 5 supporting this agreement;
Step S4: the displaying such as electric discharge amplitude, historical data curve is carried out on backstage 5.
Above-described embodiment is only be described the preferred embodiment of the present invention; not scope of the present invention is limited; under not departing from the present invention and designing the prerequisite of spirit; the various distortion that those of ordinary skill in the art make technical scheme of the present invention and improvement, all should fall in protection domain that claims of the present invention determines.
Claims (10)
1. a multi-way switch cabinet acoustoelectric signal harvester, comprises into sensor assembly (1), master control collection analysis circuit module (3), power supply unit (4), backstage (5); Sensor assembly (1) is made up of TEV sensor (11) and ultrasonic sensor (12); Sensor assembly (1) is embedded in switch cubicle; Power supply unit (4) is for providing power supply; Backstage (5) is for carrying out electric discharge amplitude, the displaying of historical data curve by Monitoring Data; It is characterized in that,
Also comprise pair signals conditioning module (2); Pair signals conditioning module (2) is made up of TEV signal conditioning circuit module (21), ultrasonic signal conditioning circuit module (22), two AD conversion module (23); The signal output part of TEV sensor (11) is electrically connected with TEV signal conditioning circuit module (21) signal input part, and TEV signal conditioning circuit module (21) signal output part is electrically connected with AD conversion module (23) signal input part; The signal output part of ultrasonic sensor (12) is electrically connected with the signal input part of ultrasonic signal conditioning circuit module (22), and ultrasonic signal conditioning circuit module (22) signal output part is electrically connected with another AD conversion module (23) signal input part; Two AD conversion module (23) are all electrically connected with the signal input part of master control collection analysis circuit module (3); The communication interface of master control collection analysis circuit module (3) is connected with backstage (5).
2. multi-way switch cabinet acoustoelectric signal harvester according to claim 1, it is characterized in that, described TEV signal conditioning circuit module (21) comprises TEV signaling multilevel filtering circuit (211), TEV signal logarithmic amplifying circuit (212), TEV signal peak detecting circuit (213); Wherein, TEV signaling multilevel filtering circuit (211) is for the signal beyond filtering 3-100MHz; The simulating signal of TEV signaling multilevel filtering circuit (211) to the feed-in of TEV sensor processes, and limits its bandwidth, reduces the electromagnetic interference (EMI) of external environment condition and improves the sensitivity of Partial Discharge Detection; TEV signal logarithmic amplifying circuit (213), for carrying out Image magnify to transient earth voltage signal, carries out volitional check amplitude to the signal of violent electric discharge phenomena; TEV signal peak detecting circuit (213) processes for the local discharge signal being as short as to ps level the duration, extracts the of paramount importance amplitude signal of Partial Discharge Detection; The setting of TEV signal peak detecting circuit (213) sampling rate is not less than 1MHz.
3. multi-way switch cabinet acoustoelectric signal harvester according to claim 1, it is characterized in that, ultrasonic signal conditioning circuit module (22) comprises ultrasonic signal pre-amplification circuit (221), ultrasonic signal bandwidth-limited circuit (222), ultrasonic signal logarithmic amplification electricity (223), ultrasonic signal peak-detector circuit (224); The feeble signal that wherein ultrasonic signal pre-amplification circuit (221) is responsible for for being exported by ultrasonic sensor (12) is amplified, and improves the antijamming capability of signal; The bandwidth of ultrasonic signal bandwidth-limited circuit (222) is 20k to 100k; Ultrasonic signal bandwidth-limited circuit (222) is responsible for the further frequency-selecting of input ultrasonic signal, to suppress spuious background audio signals interference; Output after bandpass filter frequency-selecting is used for logarithmic amplification, detection and analog to digital conversion; Ultrasonic signal logarithmic amplifying circuit (223), for carrying out Image magnify to ultrasonic signal, carries out volitional check amplitude to the signal of violent electric discharge phenomena; Ultrasonic signal peak-detector circuit (224) processes for the local discharge signal being as short as to ps level the duration, extracts the of paramount importance amplitude signal of Partial Discharge Detection; The setting of ultrasonic signal peak-detector circuit (224) sampling rate is not less than 1MHz.
4. the multi-way switch cabinet acoustoelectric signal harvester according to Claims 2 or 3, is characterized in that,
TEV signal conditioning circuit module (21) is covered by radome (24); The signal input part of TEV signal conditioning circuit module (21) connects the signal output part of TEV sensor (11) through bnc interface (25);
Ultrasonic signal conditioning circuit module (22) is covered by radome (24); The signal input part of ultrasonic signal conditioning circuit module (22) connects the signal output part of ultrasonic sensor (12) through another bnc interface (25);
The signal output part of two AD conversion module (23) is all electrically connected with FPC seat (27), and FPC seat (27) is electrically connected through the signal input part of winding displacement with master control collection analysis circuit module (3).
5. multi-way switch cabinet acoustoelectric signal harvester according to claim 4, is characterized in that,
Pair signals conditioning module (2) is fixed on first substrate (6) through the first contact pin connector (26);
Master control collection analysis circuit module (3), power supply unit (4) are all fixed on second substrate (7);
Master control acquisition process circuit module (3) comprises mainboard (31), expansion interface (32), 485 interfaces (33) and minimum system plate (34); Mainboard (31) is arranged on second substrate (7); Expansion interface (32) and 485 interfaces (33) are drawn by mainboard (31); Minimum system plate (34) is arranged on mainboard (31), and is connected with mainboard (31) through contact pin connector; The signal input part of minimum system plate (34) is connected with FPC seat (27) through winding displacement.
6. multi-way switch cabinet acoustoelectric signal harvester according to claim 5, it is characterized in that, after minimum system plate (34) receives the switch cubicle discharge signal after from pair signals conditioning module (2) process, local discharge characteristic data are extracted to transient earth voltage signal wherein and ultrasonic signal, and with Modbus agreement, Monitoring Data is uploaded eventually through the RS485 interface (33) that mainboard (31) is drawn the backstage (5) supporting this agreement, or by expansion interface (32), data are reached LCD display, carry out LCD screen to show on the spot.
7. multi-way switch cabinet acoustoelectric signal harvester according to claim 1, it is characterized in that, power supply unit (4) is protected by radome; The output terminal of power supply unit (4) draws the second contact pin connector (43), and the second contact pin connector (43) is connected through the power input lead of solder joint (42) with master control collection analysis circuit module (3); The power input of power supply unit (4) is drawn another and is organized the second contact pin connector (43), and this group second contact pin connector is connected with power interface (41) through another assembly welding point (42).
8. multi-way switch cabinet acoustoelectric signal harvester according to claim 2, is characterized in that,
TEV signaling multilevel filtering circuit (211) is: series connection access electric capacity C successively between the input end of TEV signaling multilevel filtering circuit (211) to output terminal
5, resistance R
8, inductance L
1and inductance L
2; At TEV signaling multilevel filtering circuit (211) input end and electric capacity C
5between select a node, this node respectively with diode D
1positive pole, diode D
2negative pole connect; Diode D
1negative pole and+5VU voltage between access resistance R
1; Diode D
1with resistance R
1between select a node, between this node and earth terminal, access resistance R
3, resistance R
2with electric capacity C
2connect rear and resistance R
3in parallel; Resistance R
1and select a node between+5VU voltage, access electric capacity C between this node and earth terminal
1; Diode D
2positive pole and-5VU voltage between access resistance R
4; Diode D
2with resistance R
4between select a node, between this node and earth terminal, access resistance R
6, resistance R
5with electric capacity C
4connect rear and resistance R
6in parallel; Resistance R
4and select a node between-5VU voltage, access electric capacity C between this node and earth terminal
1; At electric capacity C
5with resistance R
8between select a node, access resistance R between this node and earth terminal
7; At resistance R
8and inductance L
1between select a node, access resistance R in parallel between this node and earth terminal
9, electric capacity C
6, electric capacity C
7; In inductance L
1and inductance L
2between select a node, access electric capacity C in parallel between this node and earth terminal
8, electric capacity C
9; In inductance L
2and select a node between the output terminal of TEV signaling multilevel filtering circuit (211), access electric capacity C in parallel between this node and earth terminal
10, electric capacity C
11, resistance R
10;
TEV signal logarithmic amplifying circuit (212) is: access electric capacity C between TEV signal logarithmic amplifying circuit (212) input end and the INHI pin of logarithmic amplifier AD8310
12, electric capacity C
12and select a node between INHI pin, between this node and earth terminal, access resistance R
11; Electric capacity C is accessed between the INLO pin of logarithmic amplifier AD8310 and earth terminal
15; Resistance R is accessed between the INHI pin of logarithmic amplifier AD8310 and INLO pin
13; The COMM pin ground connection of logarithmic amplifier AD8310; Electric capacity C is accessed between the BFIN pin of logarithmic amplifier AD8310 and earth terminal
14; Between+5VT voltage and earth terminal, series connection accesses resistance R successively
12, electric capacity C
13; Resistance R
12with electric capacity C
13between select a node to connect ENBL pin, the Vpos pin of logarithmic amplifier AD8310 simultaneously; Electric capacity C is accessed between the OFLT pin of logarithmic amplifier AD8310 and earth terminal
16; The Vout pin of logarithmic amplifier AD8310 draws the signal output part of wire as TEV signal logarithmic amplifying circuit (212);
TEV signal peak detecting circuit (213) is: the pin 3 of operational amplifier A D8066 is as signal input part; Resistance R is accessed between the pin 8 of operational amplifier A D8066 and+5VT voltage
14; At pin 8 and the resistance R of operational amplifier A D8066
14between select a node, access electric capacity C between this node and earth terminal
17; Resistance R is accessed between the pin 4 of operational amplifier A D8066 and-5VT voltage
16; Electric capacity C is accessed between the pin 4 of operational amplifier A D8066 and earth terminal
18; The pin two connecting resistance R respectively of operational amplifier A D8066
15one end, diode D
3negative pole, resistance R
15another termination-5VT voltage, diode D
3positive pole connect the pin one of operational amplifier A D8066; The pin one of operational amplifier A D8066 meets diode D
4positive pole, diode D
4negative pole connect the pin 5 of operational amplifier A D8056; At diode D
4negative pole and the pin 5 of operational amplifier A D8056 between select a node, access electric capacity C between this node and earth terminal
19, between this node and-5VT, access resistance R
17; Pin 4 and the pin 8 of operational amplifier A D8056 are all in high-impedance state; The pin 6 adapter pin 7 of operational amplifier A D8056; The pin 7 of operational amplifier A D8056 draws wire, as the signal output part of TEV signal peak detecting circuit (213).
9. multi-way switch cabinet acoustoelectric signal harvester according to claim 3, is characterized in that,
Ultrasonic signal pre-amplification circuit (221) is: access electric capacity C between the signal input part of ultrasonic signal pre-amplification circuit (221) and the pin 3 of first instrument amplifier INA128
21; The pin two of first instrument amplifier INA128 accesses electric capacity C with connecting successively between earth point
20, R
18; Between the pin two of first instrument amplifier INA128 and pin 3, series connection accesses resistance R successively
19, resistance R
20; At resistance R
19with resistance R
20between select a node ground connection; Resistance R is accessed between the pin one of first instrument amplifier INA128 and pin 8
21; Between+5VU voltage and earth terminal, series connection accesses resistance R successively
22, electric capacity C
22; At resistance R
22with electric capacity C
22between select a node to be connected with the pin 7 of first instrument amplifier INA128; Between-5VU voltage and earth terminal, series connection accesses resistance R successively
23, electric capacity C
23; Resistance R
23with electric capacity C
23between select a node to be connected with the pin 4 of first instrument amplifier INA128; Electric capacity C is accessed between the pin 6 of first instrument amplifier INA128 and the pin 3 of second instrument amplifier INA128
24; At pin 3 and the electric capacity C of second instrument amplifier INA128
24between select a node, access resistance R between this node and earth terminal
24; The pin two of second instrument amplifier INA128 is connected rear ground connection with the pin 7 of first instrument amplifier INA128, the pin 5 of first instrument amplifier INA128, the pin 5 of second instrument amplifier INA128 successively; Resistance R is accessed between the pin one of second instrument amplifier INA128 and pin 8
26; Between+5VU voltage and earth terminal, series connection accesses resistance R successively
25, electric capacity C
25; At resistance R
25with electric capacity C
25between select a node to be connected with the pin 7 of second instrument amplifier INA128; Between-5VU voltage and earth terminal, series connection accesses resistance R successively
27, electric capacity C
26; Resistance R
27with electric capacity C
26between select a node to be connected with the pin 4 of second instrument amplifier INA128; Between the pin two of the pin 6 of second instrument amplifier INA128 and the two amplifier AD8058 of Voltage Feedback, series connection accesses electric capacity C successively
27, resistance R
28, electric capacity C
30; At resistance R
28with electric capacity C
30between select a node, access resistance R between this node and earth terminal
29, connect successively between this node and the pin two of the two amplifier AD8058 of Voltage Feedback simultaneously and access electric capacity C
29, resistance R
31; Electric capacity C
29with resistance R
31between select a node, the pin one of the two amplifier AD8058 of this node and Voltage Feedback is connected; Resistance R is accessed between the pin 3 of the two amplifier AD8058 of Voltage Feedback and earth terminal
30; Between+5VU voltage and earth terminal, series connection accesses resistance R successively
32, electric capacity C
31; At resistance R
32with electric capacity C
31between select the pin 8 of the two amplifier AD8058 of a node and Voltage Feedback to be connected; Between-5VU voltage and earth terminal, series connection accesses resistance R successively
33, electric capacity C
28; At resistance R
33with electric capacity C
28between select the pin 4 of the two amplifier AD8058 of a node and Voltage Feedback to be connected; The pin one of the two amplifier AD8058 of Voltage Feedback draws the signal output part of a wire as ultrasonic signal pre-amplification circuit (221);
Ultrasonic signal bandwidth-limited circuit (222) is: the signal input part of ultrasonic signal bandwidth-limited circuit (222) is connected successively with output terminal and accessed electric capacity C
32, inductance L
3; At electric capacity C
32and inductance L
3between select a node, access resistance R between this node and earth terminal
34; In inductance L
3and between output terminal, select a node, access resistance R between this node and earth terminal
35;
Ultrasonic signal logarithmic amplifying circuit (223) is: connect successively between ultrasonic signal logarithmic amplifying circuit (223) input end and the INHI pin of logarithmic amplifier AD8310 and access resistance R
36, electric capacity C
33; At resistance R
36with electric capacity C
33between select a node, between this node and earth terminal, access electric capacity C
34; Resistance R is accessed between the INHI pin of logarithmic amplifier AD8310 and INLO pin
38; Electric capacity C is accessed between the INLO pin of logarithmic amplifier AD8310 and earth terminal
38; The COMM pin ground connection of logarithmic amplifier AD8310; Electric capacity C is accessed between the BFIN pin of logarithmic amplifier AD8310 and earth terminal
36; Between+5VT voltage and earth terminal, series connection accesses resistance R successively
37, electric capacity C
35; Resistance R
37with electric capacity C
35between select a node to connect ENBL pin, the Vpos pin of logarithmic amplifier AD8310 simultaneously; Electric capacity C is accessed between the OFLT pin of logarithmic amplifier AD8310 and earth terminal
37; The Vout pin of logarithmic amplifier AD8310 and signal output part are connected successively and are accessed resistance R
39, electric capacity C
40; At resistance R
39with electric capacity C
40between select a node, access electric capacity C between this node and earth terminal
39; At electric capacity C
40and between signal output part, selecting a node, this node and earth terminal access resistance R
40;
Ultrasonic signal peak-detector circuit (224) is: the pin 3 of the two amplifier AD8058 of the first Voltage Feedback is as signal input part; Resistance R is accessed between the pin 8 of the two amplifier AD8058 of the first Voltage Feedback and+5VT voltage
41; At pin 8 and the resistance R of the two amplifier AD8058 of the first Voltage Feedback
41between select a node, access electric capacity C between this node and earth terminal
41; Resistance R is accessed between the pin 4 of the two amplifier AD8058 of the first Voltage Feedback and-5VT voltage
43; Electric capacity C is accessed between the pin 4 of the two amplifier AD8058 of the first Voltage Feedback and earth terminal
42; The pin two connecting resistance R respectively of the two amplifier AD8058 of the first Voltage Feedback
42one end, diode D
6negative pole, resistance R
42another termination-5VT voltage, diode D
6positive pole connect the pin one of the two amplifier AD8058 of the first Voltage Feedback; The pin one of the two amplifier AD8058 of the first Voltage Feedback meets diode D
5positive pole, diode D
5negative pole connect the pin 5 of the two amplifier AD8058 of the second Voltage Feedback; Resistance R
44be connected in parallel on diode D
5two ends; At diode D
5negative pole and the pin 5 of the two amplifier AD8058 of the second Voltage Feedback between select a node, access electric capacity C in parallel between this node with earth terminal
43with resistance R
46, and resistance R is accessed between this node and-5VU voltage
45; Pin 4 and the pin 8 of the two amplifier AD8058 of the second Voltage Feedback are all in high-impedance state; The pin 6 adapter pin 7 of the two amplifier AD8058 of the second Voltage Feedback; The pin 7 of the two amplifier AD8058 of the second Voltage Feedback draws wire, as the signal output part of ultrasonic signal peak-detector circuit (224).
10. a multi-way switch cabinet acoustoelectric signal acquisition method, is characterized in that, comprise the following steps:
Step S1: sensor assembly (1) receiving key cabinet local discharge signal, i.e. the transient earth voltage signal of the interior local of TEV sensor (11) search switch cabinet; The ultrasonic signal of local in ultrasonic sensor (12) search switch cabinet;
Step S2: pair signals conditioning module (2) receives the signal detected from sensor assembly (1), that is:
TEV signal conditioning circuit module (21) receives the transient earth voltage signal detected from TEV sensor (11), and does following process:
Step S21:TEV signaling multilevel filtering circuit (211) carries out filtering process to the received signal, the signal beyond filtering 3-100MHz, and the signal after process is passed to TEV signal logarithmic amplifying circuit (212);
Step S22:TEV signal logarithmic amplifying circuit (212) carries out Image magnify to transient earth voltage signal, and the signal after amplifying is passed to TEV signal peak detecting circuit (213);
Step S23:TEV signal peak detecting circuit (213) processes the local discharge signal that the duration is as short as ps level, extract the of paramount importance amplitude signal of Partial Discharge Detection, the signal after process transfers to master control collection analysis circuit mould fast (3) after A/D conversion;
Ultrasonic signal conditioning circuit module (22) receives the ultrasonic signal detected from ultrasonic sensor (12), and does following process:
Step S21 ': the feeble signal that ultrasonic sensor (12) exports is amplified by ultrasonic signal pre-amplification circuit (221), and the signal after process is reached ultrasonic signal bandwidth-limited circuit (222);
Step S22 ': ultrasonic signal bandwidth-limited circuit (222), to the further frequency-selecting of input ultrasonic signal, suppresses spuious background audio signals interference, and the signal after process is reached ultrasonic signal logarithmic amplifying circuit (223);
Step S23 ': ultrasonic signal logarithmic amplifying circuit (223) carries out Image magnify to ultrasonic signal, and the signal after amplifying is reached ultrasonic signal peak-detector circuit (224);
Step S24 ': ultrasonic signal peak-detector circuit (224) processes the local discharge signal that the duration is as short as ps level, extract the of paramount importance amplitude signal of Partial Discharge Detection, the signal after process transfers to master control collection analysis circuit mould fast (3) after A/D conversion;
Step S3: master control acquisition process circuit module (3) extracts local discharge characteristic data to transient earth voltage signal and ultrasonic signal, and with Modbus agreement, Monitoring Data is uploaded eventually through the RS485 interface (33) that mainboard (31) is drawn the backstage (5) supporting this agreement;
Step S4: backstage (5) carry out the displaying such as electric discharge amplitude, historical data curve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410727334.9A CN104360252B (en) | 2014-12-03 | 2014-12-03 | A kind of variable connector cabinet acoustoelectric signal harvester and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410727334.9A CN104360252B (en) | 2014-12-03 | 2014-12-03 | A kind of variable connector cabinet acoustoelectric signal harvester and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104360252A true CN104360252A (en) | 2015-02-18 |
| CN104360252B CN104360252B (en) | 2017-06-23 |
Family
ID=52527533
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410727334.9A Active CN104360252B (en) | 2014-12-03 | 2014-12-03 | A kind of variable connector cabinet acoustoelectric signal harvester and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104360252B (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104865511A (en) * | 2015-06-23 | 2015-08-26 | 国家电网公司 | Partial discharge detection device |
| CN106788383A (en) * | 2016-11-16 | 2017-05-31 | 天津市盛丹电子技术发展有限公司 | A kind of small-signal modulate circuit of non-electrical sensor |
| CN106970306A (en) * | 2017-04-07 | 2017-07-21 | 亿科电气股份有限公司 | A kind of partial discharge of switchgear monitoring system and monitoring method |
| CN108333485A (en) * | 2018-01-25 | 2018-07-27 | 武汉国能测控有限公司 | A kind of partial discharge of switchgear monitoring system |
| CN108802579A (en) * | 2018-05-18 | 2018-11-13 | 苏州树云网络科技有限公司 | A kind of system for monitoring ring main unit on-line |
| CN110687420A (en) * | 2019-11-15 | 2020-01-14 | 河南宏博测控技术有限公司 | Split type partial discharge detection device |
| CN110763959A (en) * | 2019-09-24 | 2020-02-07 | 武汉汉源既济电力有限公司 | High-voltage switch cabinet partial discharge detection circuit and detection method thereof |
| CN111665420A (en) * | 2020-05-29 | 2020-09-15 | 杭州电子科技大学 | Ultrasonic partial discharge detection device and detection method thereof |
| CN112462214A (en) * | 2020-11-26 | 2021-03-09 | 云南电网有限责任公司电力科学研究院 | Intelligent sensing terminal for partial discharge |
| CN112649395A (en) * | 2019-10-10 | 2021-04-13 | 漳州英特捷自动化科技有限公司 | Online near-infrared moisture meter |
| EP4345468A4 (en) * | 2022-08-15 | 2024-08-14 | State Grid Zhejiang Ningbo Power Supply Company | Ultrasonic vibration fusion adaptive conditioning circuit and flexible module |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01277774A (en) * | 1988-04-29 | 1989-11-08 | Tokyo Electric Power Co Inc:The | Detecting device of partial discharge |
| CN102692588A (en) * | 2012-06-08 | 2012-09-26 | 华北电力大学（保定） | Partial discharge detecting and positioning system and method of high-tension switch cabinet |
| CN103278751A (en) * | 2013-04-27 | 2013-09-04 | 国家电网公司 | Partial discharge comprehensive itinerant detector for high voltage electric power equipment |
| CN103529371A (en) * | 2013-11-01 | 2014-01-22 | 国网上海市电力公司 | Invasive online monitoring device for partial discharge of power distribution equipment |
| CN203773013U (en) * | 2014-03-24 | 2014-08-13 | 三泰电力技术（南京）股份有限公司 | Partial discharging detector |
| CN204269766U (en) * | 2014-12-03 | 2015-04-15 | 国家电网公司 | A kind of multi-way switch cabinet acoustoelectric signal harvester |
-
2014
- 2014-12-03 CN CN201410727334.9A patent/CN104360252B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01277774A (en) * | 1988-04-29 | 1989-11-08 | Tokyo Electric Power Co Inc:The | Detecting device of partial discharge |
| CN102692588A (en) * | 2012-06-08 | 2012-09-26 | 华北电力大学（保定） | Partial discharge detecting and positioning system and method of high-tension switch cabinet |
| CN103278751A (en) * | 2013-04-27 | 2013-09-04 | 国家电网公司 | Partial discharge comprehensive itinerant detector for high voltage electric power equipment |
| CN103529371A (en) * | 2013-11-01 | 2014-01-22 | 国网上海市电力公司 | Invasive online monitoring device for partial discharge of power distribution equipment |
| CN203773013U (en) * | 2014-03-24 | 2014-08-13 | 三泰电力技术（南京）股份有限公司 | Partial discharging detector |
| CN204269766U (en) * | 2014-12-03 | 2015-04-15 | 国家电网公司 | A kind of multi-way switch cabinet acoustoelectric signal harvester |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104865511A (en) * | 2015-06-23 | 2015-08-26 | 国家电网公司 | Partial discharge detection device |
| CN106788383A (en) * | 2016-11-16 | 2017-05-31 | 天津市盛丹电子技术发展有限公司 | A kind of small-signal modulate circuit of non-electrical sensor |
| CN106788383B (en) * | 2016-11-16 | 2024-01-26 | 天津市盛丹电子技术发展有限公司 | Weak signal conditioning circuit of non-electric quantity sensor |
| CN106970306A (en) * | 2017-04-07 | 2017-07-21 | 亿科电气股份有限公司 | A kind of partial discharge of switchgear monitoring system and monitoring method |
| CN108333485A (en) * | 2018-01-25 | 2018-07-27 | 武汉国能测控有限公司 | A kind of partial discharge of switchgear monitoring system |
| CN108802579A (en) * | 2018-05-18 | 2018-11-13 | 苏州树云网络科技有限公司 | A kind of system for monitoring ring main unit on-line |
| CN110763959A (en) * | 2019-09-24 | 2020-02-07 | 武汉汉源既济电力有限公司 | High-voltage switch cabinet partial discharge detection circuit and detection method thereof |
| CN110763959B (en) * | 2019-09-24 | 2022-02-22 | 武汉汉源既济电力有限公司 | High-voltage switch cabinet partial discharge detection method |
| CN112649395A (en) * | 2019-10-10 | 2021-04-13 | 漳州英特捷自动化科技有限公司 | Online near-infrared moisture meter |
| CN112649395B (en) * | 2019-10-10 | 2024-03-08 | 漳州英特捷自动化科技有限公司 | Online near-infrared moisture meter |
| CN110687420A (en) * | 2019-11-15 | 2020-01-14 | 河南宏博测控技术有限公司 | Split type partial discharge detection device |
| CN111665420A (en) * | 2020-05-29 | 2020-09-15 | 杭州电子科技大学 | Ultrasonic partial discharge detection device and detection method thereof |
| CN112462214A (en) * | 2020-11-26 | 2021-03-09 | 云南电网有限责任公司电力科学研究院 | Intelligent sensing terminal for partial discharge |
| CN112462214B (en) * | 2020-11-26 | 2023-01-20 | 云南电网有限责任公司电力科学研究院 | Intelligent sensing terminal for partial discharge |
| EP4345468A4 (en) * | 2022-08-15 | 2024-08-14 | State Grid Zhejiang Ningbo Power Supply Company | Ultrasonic vibration fusion adaptive conditioning circuit and flexible module |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104360252B (en) | 2017-06-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104360252A (en) | Acoustic and electric signal acquiring device and method of multichannel switch cabinet | |
| CN204269766U (en) | A kind of multi-way switch cabinet acoustoelectric signal harvester | |
| CN103197209B (en) | Partial discharge work frequency synchronization signal sensing device | |
| CN201247278Y (en) | On-line monitoring device for grounding current of transformer iron core | |
| CN110208635A (en) | A kind of insulation monitoring device of positioning function with ground that capableing of self-test | |
| CN101930031A (en) | Multi-point simultaneous-measurement digital grounding resistance tester | |
| CN202075376U (en) | GIS (gas-insulated switchgear) partial discharge monitoring device | |
| CN205080227U (en) | Ground net detecting system | |
| CN104459493A (en) | Switch cabinet partial discharge on-line monitoring system | |
| CN204188757U (en) | Portable power equipment leakage point insulating pick-up unit | |
| CN204925322U (en) | A ultrasonic sensor device for cubical switchboard partial discharge detector | |
| CN206892262U (en) | A kind of partial discharge of transformer detecting system | |
| CN203149066U (en) | Distributed on-line insulation monitoring device for electrical network operation equipment | |
| CN107677880A (en) | A kind of overvoltage intelligent identifying system based on the monitoring of leakage conductor tail current | |
| CN102759681A (en) | Transformer core ground fault monitoring device | |
| CN202676845U (en) | Device for monitoring earth fault of transformer core | |
| CN201600390U (en) | Tap measuring terminal of high voltage electrical apparatus | |
| CN101359843A (en) | Switch cupboard monitoring management apparatus | |
| CN110837026A (en) | Power distribution network fault detection device, system and method | |
| CN212229083U (en) | Partial discharge comprehensive detection device for open-type high-voltage electrical equipment | |
| CN213902689U (en) | Wireless temperature measurement system of high-low voltage switch cabinet | |
| CN204214993U (en) | Novel local electric discharge early warning on-Line Monitor Device | |
| CN106817095A (en) | A kind of small-signal isolated amplifier with self-calibration function | |
| CN205176134U (en) | Join in marriage net harmonic monitoring facilities | |
| CN208607278U (en) | A kind of current testing device for CVT secondary voltage test device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100031 West Chang'an Avenue, Xicheng District, Xicheng District, Beijing Co-patentee after: Electric Power Research Institute of State Grid Anhui Electric Power Company Patentee after: State Grid Corporation of China Co-patentee after: Red phase Limited by Share Ltd Address before: 100031 West Chang'an Avenue, Xicheng District, Xicheng District, Beijing Co-patentee before: Electric Power Research Institute of State Grid Anhui Electric Power Company Patentee before: State Grid Corporation of China Co-patentee before: Xiamen Red Phase Instruments Inc. |
|
| CP01 | Change in the name or title of a patent holder |