CN105277907A - On-site assessment system for partial discharge sensor - Google Patents

On-site assessment system for partial discharge sensor Download PDF

Info

Publication number
CN105277907A
CN105277907A CN201510638447.6A CN201510638447A CN105277907A CN 105277907 A CN105277907 A CN 105277907A CN 201510638447 A CN201510638447 A CN 201510638447A CN 105277907 A CN105277907 A CN 105277907A
Authority
CN
China
Prior art keywords
resistance
signal
electric capacity
sensor
discharge
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
Application number
CN201510638447.6A
Other languages
Chinese (zh)
Other versions
CN105277907B (en
Inventor
卞超
孙毅
王荣
甘强
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
State Grid Corp of China SGCC
State Grid Jiangsu Electric Power Co Ltd
Maintenance Branch of State Grid Jiangsu Electric Power Co Ltd
Original Assignee
State Grid Corp of China SGCC
State Grid Jiangsu Electric Power Co Ltd
Maintenance Branch of State Grid Jiangsu Electric Power Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by State Grid Corp of China SGCC, State Grid Jiangsu Electric Power Co Ltd, Maintenance Branch of State Grid Jiangsu Electric Power Co Ltd filed Critical State Grid Corp of China SGCC
Priority to CN201510638447.6A priority Critical patent/CN105277907B/en
Publication of CN105277907A publication Critical patent/CN105277907A/en
Application granted granted Critical
Publication of CN105277907B publication Critical patent/CN105277907B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The invention discloses an on-site assessment system for a partial discharge sensor, and the system comprises a signal generation module, transformer station GIS equipment, a signal collection module, a safety detection module, a wireless receiving and transmitting module, and a data processing server. The signal generation module is connected with the transformer station GIS equipment, and generates an ultrahigh frequency pulse signal which is injected into the transformer station GIS equipment. The generation frequency and amplitude of the ultrahigh frequency pulse signal are controlled by the data processing server through employing the wireless receiving and transmitting module to send instructions. The system can simulate different partial discharge signal models through the signal generation module, injects signal into the GIS, receives the signals through an ultrahigh frequency sensor, compares results with model signals of the signal generation module, estimates the performance of a built-in sensor in the GIS, can achieve the detection of the safety of the built-in sensor, and enables the detection results to be transmitted to the data processing server in a wireless manner.

Description

The site assessment system of sensor is put in a kind of office
Technical field
A device for technical field of power systems, is specifically related to the site assessment system that sensor is put in a kind of office.
Background technology
GIS is visual plant conventional in electric system, GIS portion can produce shelf depreciation when there is insulation defect, by effectively can judge the state of insulation of switchgear to the detection of shelf depreciation, effectively detect shelf depreciation to guaranteeing out that the safe and stable operation of GIS is significant.
The partial discharge phenomenon that GIS inside produces due to insulation defect mainly comprises the electric discharge of corona defect, void defects electric discharge, the electric discharge of suspension electrode defect and particle defects electric discharge Four types, its partial discharge pulse's ripple and power frequency supply phase place have strong correlativity, such as: the partial discharge pulse of corona defect electric discharge occurs on power frequency supply negative half period mostly; Flash-over characteristic when voltage is forward or backwards born at void defects two ends is more consistent, and therefore the positive-negative half-cycle of its partial discharge pulse distribution is symmetrical and correlativity is strong; Suspension electrode defect between high-pressure side and grounded shield, and is not all connected with both, therefore the partial discharge pulse of its positive-negative half-cycle is also comparatively symmetrical and number of times that is that occur is comparatively rare; Particle defects electric discharge produces electric discharge along with beating of particulate, and partial discharge pulse's number of times is rare and the generation moment is uncorrelated with operating frequency phase.
In the detection method of the inner local discharge signal of current GIS, superfrequency method realizes the practical feasible method of GIS partial discharge on-line monitoring at present.Superfrequency method utilizes the electromagnetic wave of the discharge excited 300MHz to 3GHz of sensor local to monitor shelf depreciation.The monitoring range of superfrequency method is wider, and during on-line monitoring, number of sensors is less, and shelf depreciation on-line checkingi is quick and convenient with location.Superfrequency method has irreplaceable advantage due to it in switchgear partial discharge monitoring, has become the Main Means that GIS runs on-the-spot Partial Discharge Detection in recent years.
Therefore the performance of built-in superfrequency sensor plays deciding factor for testing result.There is a large amount of local discharge detection devices on the market at present, comprise handhold portable pick-up unit and on-Line Monitor Device etc.The electric and magnetic oscillation that shelf depreciation produces can generate electromagnetic waves, in solid and gas and gas medium, can be there is the electromagnetic wave superfrequency component enriched very much in partial discharge pulse's ripple, superfrequency Partial Discharge Detection equipment judges the seriousness of GIS built-in electrical insulation defect fault by the electromagnetic wave of the 300MHz to 3GHz excited during shelf depreciation in monitoring GIS.But for the qualification of GIS built-in sensors, lack detection means.
Summary of the invention
The object of the invention is to be to overcome the defect of prior art and provide and can produce four kinds of typical local discharge signals that is virtually reality like reality, the local discharge signal that superfrequency local discharge signal acquisition module produces by detecting local discharge signal generation module, show testing result, with in model signals comparison, thus assessment built-in sensors performance.
Technical solution of the present invention is as follows:
The site assessment system of sensor (local discharge sensor) is put in a kind of office, comprises signal generating module, transformer station's GIS device, signal acquisition module, security detection module, radio receiving transmitting module and data processing server 6;
Signal generating module is connected with transformer station GIS device, signal generating module produces superfrequency pulse signal (300MHz-3GHz) to transformer station's GIS device injected pulse signal, and the occurrence frequency of superfrequency pulse signal and amplitude send instruction by data processing server by radio receiving transmitting module and control;
The built-in superfrequency sensor (300MHz-3GHz) of transformer station's GIS device is evaluation object;
Signal acquisition module receives the ultrahigh-frequency signal of transformer station's GIS device for gathering, collection result is sent to data processing server by radio receiving transmitting module;
Security detection module, for assessment of the security performance of built-in superfrequency sensor, comprises characterisitic parameter such as test stake resistance, electric capacity etc., to assess built-in superfrequency sensor safe performance, whether can produce injury to operating personnel.
Radio receiving transmitting module, carries out wireless telecommunications for examining module with signal generating module, signal acquisition module, security, sends order and receives data result, by wireless or USB communication between radio receiving transmitting module and data processing server.
Data processing server, for control signal generation module and display assessment result.
Signal generating module produces shelf depreciation type signal (four kinds of shelf depreciation type signals: corona discharge signal, bubble-discharge signal, suspension electrode discharge signal and particulate discharge signal), and exported by interface, the application such as verification can be carried out to Partial Discharge Detection equipment.Signal generating module 1 carries out power frequency synchronously simulating partial discharge signal generator based on light, photodiode is adopted to obtain light strong and weak signals, to obtain power supply power frequency locking phase, produce multicycle signal can with supply voltage phase place precise synchronization, be convenient to do availability deciding to Partial Discharge Detection equipment.
General signal source can only adopt the repetition frequency of therein equipment, the 50Hz cycle incidence signal such as set, and namely output signal keeps synchronous with the signal of 50Hz.But the frequency due to line voltage is not accurate 50Hz, generally wave between 49Hz ~ 51Hz, therefore signal generating module of the present invention, the simulating signal of generation can precisely mend the phase place of grabbing synchronizing signal, ensures the synchronized relation repeatedly produced with 50Hz between signal.
Signal generating module comprises the first wireless transceiver circuit, synchronous trigger circuit, signal generating circuit, keyboard button and output interface; First wireless transceiver circuit, synchronous trigger circuit, signal generating circuit and output interface are linked in sequence successively, and keyboard button is connected with signal generating circuit.
Output interface is N-type, BNC or SMA head.
Signal acquisition module comprises detecting circuit, and detecting circuit comprises the first detector diode D1, the second detector diode D2, the first resistance R1, the second resistance R2, the first electric capacity C1, the second electric capacity C2 and the 3rd electric capacity C3; Second resistance R2, the second electric capacity C2 are connected between VDD-to-VSS line after connecting, it is in parallel with the second electric capacity C2 after first detector diode D1, the second detector diode D2 are connected in series, first resistance R1 is in parallel with the second electric capacity C2, one end of first electric capacity C1 connects ultrahigh-frequency signal input end, the other end is connected between the positive pole of the negative pole of the first detector diode D1, the second detector diode D2, one end of 3rd electric capacity C3 connects the negative pole of the second detector diode D2, and the other end is that peak value keeps detection signal output terminal.
Sensor safe testing circuit is put in the security detection module office of comprising, office puts sensor safe testing circuit and comprises wireless transceiver circuit, 555 timely checking circuits, display and push-button unit and interface circuit, and wireless transceiver circuit, display and push-button unit, interface circuit are all connected with 555 timely checking circuits.
555 timely checking circuits comprise multi-resonant oscillating circuit, and multi-resonant oscillating circuit comprises 555 timers, the first resistance R11, the second resistance R12, the first electric capacity C11, the second electric capacity C12, the first relay K 1 and the second relay K 2; First resistance R11 is connected to reset terminal and the discharge end of 555 timers, reset terminal connects power end, between the discharge end being connected to 555 timers after relay K 1, second resistance R12 is connected in series and trigger end, trigger end, threshold value end are connected, between the trigger end that first electric capacity C11, relay K 2 are connected to 555 timers after being connected in series and earth terminal, the second electric capacity C12 is connected between the control voltage end of 555 timers and earth terminal.
555 timely checking circuits comprise to be measured core end resistance value over the ground and measures core end capacitance over the ground, specifically comprises the following steps:
S1, measures core end resistance over the ground, specifically comprises the following steps,
S101, disconnects the first relay K 1, and core end office being put sensor is connected to the discharge end of 555 timers, and the shell end that sensor is put in office is connected to trigger end, and the resistance measured between discharge end and trigger end is measure the resistance of core end resistance RX over the ground;
S102,555 timer monostable circuit 555 timely checking circuits produce pulse waveform: switch on power, power Vcc is charged to the first electric capacity C11 by the first resistance R11 and core end resistance RX over the ground, Uc1 is the magnitude of voltage at the first electric capacity C11 two ends, as Uc1 < 1/3Vcc, the oscillator output level Vo=1 of 555 timer inside, the discharge tube cut-off of 555 timer inside; When Uc1 be charged to >=2/3Vcc after, the oscillator output level Vo of 555 timer inside is turned into 0, now discharge tube conducting, makes discharge end ground connection, and the first electric capacity C11 is discharged over the ground by core end resistance RX over the ground, and Uc1 is declined; When Uc1 drop to≤1/3Vcc after, the oscillator output level Vo of 555 timer inside is turned into 1, discharge tube ends, make discharge end earth-free, power Vcc is charged to the first electric capacity C11 again by the first resistance and core end resistance RX over the ground, make Uc1 rise to 2/3Vcc from 1/3Vcc, the trigger of 555 timer inside overturns;
S103 repeats step S102, obtains continually varying oscillating impulse waveform at output end vo; The low duration t of the pulse width of oscillating impulse pL=0.693*RX*C1, is determined by electric capacity C11 discharge time; The high level lasting time t of the pulse width of oscillating impulse pH=0.693* (R1+RX) * C1, is determined by the electric capacity C11 duration of charging, recurrence interval T=t pL+ t pH;
S104, reads the low and high level of the output terminal of 555 timers, draws output pulse frequency f, calculates core end resistance value RX over the ground;
f = 1 l n 2 * ( R 11 + 2 R X ) * C 11 &DoubleRightArrow; R X = 1 2 * ( 1 l n 2 * f * C 11 - R 11 ) ;
S2, measures core end capacitance over the ground, specifically comprises the following steps,
S201, disconnects the second relay K 2, and core end office being put sensor is connected to the trigger end of 555 timers, and the shell that sensor is put in office is connected to earth terminal, and the capacitance measured between trigger end and earth terminal is the capacitance measuring core end ground capacitance CX;
S202,555 timely checking circuits produce pulse waveform: switch on power, power Vcc is charged to core end ground capacitance CX by the first resistance R11 and the second resistance R12, Ucx is the magnitude of voltage at core end ground capacitance CX two ends, as Ucx < 1/3Vcc, the oscillator output level Vo=1 of 555 timer inside, discharge tube ends; When Ucx be charged to >=2/3Vcc after, the oscillator of 555 timer inside exports Vo and is turned into 0, discharge tube conducting, and make discharge end (DIS) ground connection, core end ground capacitance CX is discharged over the ground by the second resistance R12, and Ucx is declined; When Ucx drop to≤1/3Vcc after, the oscillator output level Vo of 555 timer inside is turned into 1, discharge tube ends, make discharge end earth-free, power Vcc is charged to electric capacity CX by the first resistance R11 and the second resistance R12, make Ucx rise to 2/3Vcc from 1/3Vcc, the trigger of 555 timer inside overturns;
S203, repeats step S202, obtains continually varying oscillating impulse waveform at output terminal; The low duration t of the pulse width of oscillating impulse pL=0.693*R12*CX, is determined by core end ground capacitance CX discharge time;
The high level lasting time t of the pulse width of oscillating impulse pH=0.693* (R11+R12) * CX, is determined by the duration of charging of core end ground capacitance CX, recurrence interval T=t pL+ t pH;
S204, the output terminal low and high level reading 555 timers draws output pulse frequency f, calculates the capacitance of core end electric capacity CX over the ground;
f = 1 l n 2 * ( R 11 + 2 R 12 ) * C X
If R11=R12, then C X = 1 3 l n 2 * f * R 11 .
Radio receiving transmitting module is Zigbee module, integrated enhanced 8051CPU and ZigBee radio receiving transmitting module, relative to the scheme of traditional CPU+ radio transmitting and receiving chip, decrease peripheral hardware quantity, reduce system cost, have different operational modes in addition, under SleepTimerRunning pattern, standby current is only 1uA, make it especially adapt to the system of super low-power consumption requirement, the switching time between operational mode is short further ensure that low energy expenditure.
Compared with prior art, beneficial effect of the present invention comprises:
The present invention discloses the site assessment system that sensor is put in a kind of office, different local discharge signal models can be simulated by signal generating module, inner by injecting GIS, by superfrequency sensor Received signal strength, monitored by signal acquisition module collection, the model signals of result of determination and signal generating module contrasts, and can assess the performance of GIS built-in sensors; Security detection module can realize detecting built-in sensor safe sex chromosome mosaicism in addition, and the result of detection is wirelessly sent to data processing server end.
Accompanying drawing explanation
Fig. 1 is the site assessment system architecture schematic diagram that sensor is put in a kind of office of the present invention;
Fig. 2 is signal generating module structural representation;
Fig. 3 is signal acquisition module circuit diagram;
Fig. 4 is that sensor safe testing circuit structural representation is put in office;
Fig. 5 is multi-resonant oscillating circuit circuit diagram;
Fig. 6 is the circuit diagram of core end resistance measurement circuit over the ground;
Fig. 7 is the circuit diagram of core end capacitance measurement circuit over the ground.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further described.
As shown in Figure 1, the site assessment system of sensor is put in a kind of office, comprises signal generating module 1, transformer station's GIS device 2, signal acquisition module 3, security detection module 4, radio receiving transmitting module 5 and data processing server 6.
Signal generating module 1 is connected with transformer station GIS device 2, signal generating module 1 produces superfrequency pulse signal (300MHz-3GHz) to transformer station's GIS device injected pulse signal, and the occurrence frequency of superfrequency pulse signal and amplitude send instruction by data processing server 6 by radio receiving transmitting module 5 and control;
The built-in superfrequency sensor (300MHz-3GHz) of transformer station's GIS device 2 is evaluation object;
Signal acquisition module 3 receives the ultrahigh-frequency signal of transformer station's GIS device 2 for gathering, collection result is sent to data processing server 6 by radio receiving transmitting module 5;
Security detection module 4, for assessment of the security performance of built-in superfrequency sensor, comprises characterisitic parameter such as test stake resistance, electric capacity etc., to assess built-in superfrequency sensor safe performance, whether can produce injury to operating personnel.
Radio receiving transmitting module 5, carries out wireless telecommunications for examining module 4 with signal generating module 1, signal acquisition module 3, security, sends order and receives data result, by wireless or USB communication between radio receiving transmitting module 5 and data processing server 6.
Data processing server 6, for control signal generation module 1 and display assessment result.
Signal generating module 1 produces shelf depreciation type signal (four kinds of shelf depreciation type signals: corona discharge signal, bubble-discharge signal, suspension electrode discharge signal and particulate discharge signal), and exported by interface, the application such as verification can be carried out to Partial Discharge Detection equipment.Signal generating module 1 carries out power frequency synchronously simulating partial discharge signal generator based on light, photodiode is adopted to obtain light strong and weak signals, to obtain power supply power frequency locking phase, produce multicycle signal can with supply voltage phase place precise synchronization, be convenient to do availability deciding to Partial Discharge Detection equipment.
General signal source can only adopt the repetition frequency of therein equipment, the 50Hz cycle incidence signal such as set, and namely output signal keeps synchronous with the signal of 50Hz.But the frequency due to line voltage is not accurate 50Hz, generally wave between 49Hz ~ 51Hz, therefore signal generating module of the present invention, the simulating signal of generation can precisely mend the phase place of grabbing synchronizing signal, ensures the synchronized relation repeatedly produced with 50Hz between signal.
As shown in Figure 2, signal generating module 1 comprises the first wireless transceiver circuit 101, synchronous trigger circuit 102, signal generating circuit 103, keyboard button 104 and output interface 105; First wireless transceiver circuit 101, synchronous trigger circuit 102, signal generating circuit 103 and output interface 105 are linked in sequence successively, and keyboard button 104 is connected with signal generating circuit 103.
Output interface 105 is N-type, BNC or SMA head.
Signal acquisition module 3 comprises detecting circuit, and as shown in Figure 3, detecting circuit comprises the first detector diode D1, the second detector diode D2, the first resistance R1, the second resistance R2, the first electric capacity C1, the second electric capacity C2 and the 3rd electric capacity C3; Second resistance R2, the second electric capacity C2 are connected between VDD-to-VSS line after connecting, it is in parallel with the second electric capacity C2 after first detector diode D1, the second detector diode D2 are connected in series, first resistance R1 is in parallel with the second electric capacity C2, one end of first electric capacity C1 connects ultrahigh-frequency signal input end, the other end is connected between the positive pole of the negative pole of the first detector diode D1, the second detector diode D2, one end of 3rd electric capacity C3 connects the negative pole of the second detector diode D2, and the other end is that peak value keeps detection signal output terminal.
As shown in Figure 4, sensor safe testing circuit is put in security detection module 4 office of comprising, office puts sensor safe testing circuit and comprises wireless transceiver circuit a, 555 timely checking circuit b, display and push-button unit c and interface circuit d, wireless transceiver circuit a, display and push-button unit c, interface circuit d and be all connected with 555 timely checking circuit b.
555 timely checking circuit b comprise multi-resonant oscillating circuit, and as shown in Figure 5, multi-resonant oscillating circuit comprises 555 timers, the first resistance R11, the second resistance R12, the first electric capacity C11, the second electric capacity C12, the first relay K 1 and the second relay K 2; First resistance R11 is connected to reset terminal RST and the discharge end DIS of 555 timers, reset terminal RST connects power end VCC, be connected between the discharge end DIS of 555 timers and trigger end TRI after relay K 1, second resistance R12 is connected in series, trigger end TRI, threshold value end THR are connected, first electric capacity C11, relay K 2 are connected to after being connected in series between the trigger end TRI of 555 timers and earth terminal GND, and the second electric capacity C12 is connected between the control voltage end CON of 555 timers and earth terminal GND.Second electric capacity C12 is definite value electric capacity, is 100nF.
555 timely checking circuits comprise to be measured core end resistance value over the ground and measures core end capacitance over the ground, specifically comprises the following steps:
S1, measures core end resistance over the ground, specifically comprises the following steps,
S101, as shown in Figure 6, disconnect the first relay K 1, core end office being put sensor is connected to the discharge end DIS of 555 timers, the shell end that sensor is put in office is connected to trigger end TRI, and the resistance measured between discharge end DIS and trigger end TRI is measure the resistance of core end resistance RX over the ground;
S102,555 timely checking circuits produce pulse waveform: switch on power, power Vcc is charged to the first electric capacity C11 by the first resistance R11 and core end resistance RX over the ground, Uc1 is the magnitude of voltage at the first electric capacity C11 two ends, as Uc1 < 1/3Vcc, the oscillator output level Vo=1 of 555 timer inside, the discharge tube cut-off of 555 timer inside; When Uc1 be charged to >=2/3Vcc after, the oscillator output level Vo of 555 timer inside is turned into 0, now discharge tube conducting, makes discharge end DIS ground connection, and the first electric capacity C11 is discharged over the ground by core end resistance RX over the ground, and Uc1 is declined; When Uc1 drop to≤1/3Vcc after, the oscillator output level Vo of 555 timer inside is turned into 1, discharge tube ends, make discharge end DIS earth-free, power Vcc is charged to the first electric capacity C11 again by the first resistance and core end resistance RX over the ground, make Uc1 rise to 2/3Vcc from 1/3Vcc, the trigger of 555 timer inside overturns;
S103 repeats step S102, obtains continually varying oscillating impulse waveform at output end vo; The low duration t of the pulse width of oscillating impulse pL=0.693*RX*C1, is determined by electric capacity C11 discharge time; The high level lasting time t of the pulse width of oscillating impulse pH=0.693* (R1+RX) * C1, is determined by the electric capacity C11 duration of charging, recurrence interval T=t pL+ t pH;
S104, reads the low and high level of the output terminal OUT of 555 timers, draws output pulse frequency f, calculates core end resistance value RX over the ground;
f = 1 l n 2 * ( R 11 + 2 R X ) * C 11 &DoubleRightArrow; R X = 1 2 * ( 1 l n 2 * f * C 11 - R 11 ) ;
S2, measures core end capacitance over the ground, specifically comprises the following steps,
S201, as shown in Figure 7, disconnect the second relay K 2, core end office being put sensor is connected to the trigger end TRI of 555 timers, the shell that sensor is put in office is connected to earth terminal GND, and the capacitance measured between trigger end TRI and earth terminal GND is the capacitance measuring core end ground capacitance CX;
S202,555 timer monostable circuit 555 timely checking circuits produce pulse waveform: switch on power, power Vcc is charged to core end ground capacitance CX by the first resistance R11 and the second resistance R12, Ucx is the magnitude of voltage at core end ground capacitance CX two ends, as Ucx < 1/3Vcc, the oscillator output level Vo=1 of 555 timer inside, discharge tube ends; When Ucx be charged to >=2/3Vcc after, the oscillator of 555 timer inside exports Vo and is turned into 0, discharge tube conducting, and make discharge end DIS ground connection, core end ground capacitance CX is discharged over the ground by the second resistance R12, and Ucx is declined; When Ucx drop to≤1/3Vcc after, the oscillator output level Vo of 555 timer inside is turned into 1, discharge tube ends, make discharge end DIS earth-free, power Vcc is charged to electric capacity CX by the first resistance R11 and the second resistance R12, make Ucx rise to 2/3Vcc from 1/3Vcc, the trigger of 555 timer inside overturns;
S203, repeats step S202, obtains continually varying oscillating impulse waveform at output terminal OUT; The low duration t of the pulse width of oscillating impulse pL=0.693*R12*CX, is determined by core end ground capacitance CX discharge time;
The high level lasting time t of the pulse width of oscillating impulse pH=0.693* (R11+R12) * CX, is determined by the duration of charging of core end ground capacitance CX, recurrence interval T=t pL+ t pH;
S204, the output terminal OUT low and high level reading 555 timers draws output pulse frequency f, calculates the capacitance of core end electric capacity CX over the ground;
f = 1 l n 2 * ( R 11 + 2 R 12 ) * C X
If R11=R12, then C X = 1 3 l n 2 * f * R 11 .
Radio receiving transmitting module is Zigbee module, integrated enhanced 8051CPU and ZigBee radio receiving transmitting module, relative to the scheme of traditional CPU+ radio transmitting and receiving chip, decrease peripheral hardware quantity, reduce system cost, have different operational modes in addition, under SleepTimerRunning pattern, standby current is only 1uA, make it especially adapt to the system of super low-power consumption requirement, the switching time between operational mode is short further ensure that low energy expenditure.
The above is only the preferred embodiment of the present invention; be noted that for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.

Claims (10)

1. the site assessment system of sensor is put in an office, it is characterized in that, comprise signal generating module (1), transformer station's GIS device (2), signal acquisition module (3), security detection module (4), radio receiving transmitting module (5) and data processing server (6);
Described signal generating module (1) is connected with transformer station's GIS device (2), signal generating module (1) produces superfrequency pulse signal to transformer station's GIS device injected pulse signal, and the occurrence frequency of described superfrequency pulse signal and amplitude send instruction by data processing server (6) by radio receiving transmitting module (5) and control;
The built-in superfrequency sensor of described transformer station GIS device (2) is evaluation object;
Described signal acquisition module (3) receives the ultrahigh-frequency signal of transformer station's GIS device 2 for gathering, collection result is sent to data processing server 6 by radio receiving transmitting module (5);
Described security detection module (4) is for assessment of the security performance of built-in superfrequency sensor;
Described radio receiving transmitting module (5), carries out wireless telecommunications for examining module (4) with signal generating module (1), signal acquisition module (3), security;
Described data processing server (6), for control signal generation module (1) and display assessment result.
2. the site assessment system of sensor is put in a kind of office according to claim 1, it is characterized in that,
Described signal generating module (1) produces shelf depreciation type signal, and is exported by interface, verifies Partial Discharge Detection equipment;
Signal generating module 1 carries out power frequency synchronously simulating partial discharge signal generator based on light, adopts photodiode to obtain light strong and weak signals, obtain power supply power frequency locking phase.
3. the site assessment system of sensor is put in a kind of office according to claim 1, it is characterized in that,
Described signal generating module (1) comprises the first wireless transceiver circuit (101), synchronous trigger circuit (102), signal generating circuit (103), keyboard button (104) and output interface (105); Described first wireless transceiver circuit (101), synchronous trigger circuit (102), signal generating circuit (103) and output interface (105) are linked in sequence successively, and keyboard button (104) is connected with signal generating circuit (103).
4. the site assessment system of sensor is put in a kind of office according to claim 3, it is characterized in that,
Described output interface (105) is N-type, BNC or SMA head.
5. the site assessment system of sensor is put in a kind of office according to claim 1, it is characterized in that,
Described signal acquisition module (3) comprises detecting circuit, and described detecting circuit comprises the first detector diode D1, the second detector diode D2, the first resistance R1, the second resistance R2, the first electric capacity C1, the second electric capacity C2 and the 3rd electric capacity C3; Described second resistance R2, the second electric capacity C2 are connected between VDD-to-VSS line after connecting, it is in parallel with the second electric capacity C2 after described first detector diode D1, the second detector diode D2 are connected in series, described first resistance R1 is in parallel with the second electric capacity C2, one end of first electric capacity C1 connects ultrahigh-frequency signal input end, the other end is connected between the positive pole of the negative pole of the first detector diode D1, the second detector diode D2, one end of 3rd electric capacity C3 connects the negative pole of the second detector diode D2, and the other end is that peak value keeps detection signal output terminal.
6. the site assessment system of sensor is put in a kind of office according to claim 1, it is characterized in that,
Sensor safe testing circuit is put in described security detection module (4) office of comprising, office puts sensor safe testing circuit and comprises wireless transceiver circuit (a), 555 timely checking circuits (b), display and push-button unit (c) and interface circuit (d), and described wireless transceiver circuit (a), display and push-button unit (c), interface circuit (d) are all connected with described 555 timely checking circuits (b).
7. the site assessment system of sensor is put in a kind of office according to claim 6, it is characterized in that,
Described 555 timely checking circuits (b) comprise multi-resonant oscillating circuit, and described multi-resonant oscillating circuit comprises 555 timers, the first resistance R11, the second resistance R12, the first electric capacity C11, the second electric capacity C12, the first relay K 1 and the second relay K 2, first resistance R11 is connected to reset terminal (RST) and the discharge end (DIS) of 555 timers, reset terminal (RST) connects power end (VCC), described relay K 1, be connected between the discharge end (DIS) of 555 timers and trigger end (TRI) after second resistance R12 is connected in series, described trigger end (TRI), threshold value end (THR) is connected, described first electric capacity C11, be connected between the trigger end (TRI) of 555 timers and earth terminal (GND) after relay K 2 is connected in series, described second electric capacity C12 is connected between the control voltage end (CON) of 555 timers and earth terminal (GND).
8. the site assessment system of sensor is put in a kind of office according to claim 7, it is characterized in that,
Described 555 timely checking circuits (b) comprise to be measured core end resistance value over the ground and measures core end capacitance over the ground, specifically comprises the following steps:
S1, measures core end resistance over the ground, specifically comprises the following steps,
S101, disconnect the first relay K 1, core end office being put sensor is connected to the discharge end (DIS) of 555 timers, the shell end that sensor is put in office is connected to trigger end (TRI), and the resistance measured between discharge end (DIS) and trigger end (TRI) is measure the resistance of core end resistance RX over the ground;
S102,555 timely checking circuits produce pulse waveform: switch on power, power Vcc is charged to the first electric capacity C11 by the first resistance R11 and core end resistance RX over the ground, Uc1 is the magnitude of voltage at the first electric capacity C11 two ends, as Uc1 < 1/3Vcc, the oscillator output level Vo=1 of 555 timer inside, the discharge tube cut-off of 555 timer inside; When Uc1 be charged to >=2/3Vcc after, the oscillator output level Vo of 555 timer inside is turned into 0, now discharge tube conducting, makes discharge end (DIS) ground connection, and the first electric capacity C11 is discharged over the ground by core end resistance RX over the ground, and Uc1 is declined; When Uc1 drop to≤1/3Vcc after, the oscillator output level Vo of 555 timer inside is turned into 1, discharge tube ends, make discharge end (DIS) earth-free, power Vcc is charged to the first electric capacity C11 again by the first resistance and core end resistance RX over the ground, make Uc1 rise to 2/3Vcc from 1/3Vcc, the trigger of 555 timer inside overturns;
S103 repeats step S102, obtains continually varying oscillating impulse waveform at output end vo; The low duration t of the pulse width of oscillating impulse pL=0.693*RX*C11, is determined by electric capacity C11 discharge time; The high level lasting time t of the pulse width of oscillating impulse pH=0.693* (R1+RX) * C11, is determined by the electric capacity C11 duration of charging, recurrence interval T=t pL+ t pH;
S104, reads the low and high level of the output terminal (OUT) of 555 timers, draws output pulse frequency f, calculate core end resistance value RX over the ground;
f = 1 l n 2 * ( R 11 + 2 R X ) * C 11 &DoubleRightArrow; R X = 1 2 * ( 1 l n 2 * f * C 11 - R 11 ) ;
S2, measures core end capacitance over the ground, specifically comprises the following steps,
S201, disconnect the second relay K 2, core end office being put sensor is connected to the trigger end (TRI) of 555 timers, the shell that sensor is put in office is connected to earth terminal (GND), and the capacitance measured between trigger end (TRI) and earth terminal (GND) is the capacitance measuring core end ground capacitance CX;
S202,555 timer monostable circuit 555 timely checking circuits produce pulse waveform: switch on power, power Vcc is charged to core end ground capacitance CX by the first resistance R11 and the second resistance R12, Ucx is the magnitude of voltage at core end ground capacitance CX two ends, as Ucx < 1/3Vcc, the oscillator output level Vo=1 of 555 timer inside, discharge tube ends; When Ucx be charged to >=2/3Vcc after, the oscillator of 555 timer inside exports Vo and is turned into 0, discharge tube conducting, and make discharge end (DIS) ground connection, core end ground capacitance CX is discharged over the ground by the second resistance R12, and Ucx is declined; When Ucx drop to≤1/3Vcc after, the oscillator output level Vo of 555 timer inside is turned into 1, discharge tube ends, make discharge end (DIS) earth-free, power Vcc is charged to electric capacity CX by the first resistance R11 and the second resistance R12, make Ucx rise to 2/3Vcc from 1/3Vcc, the trigger of 555 timer inside overturns;
S203, repeats step S202, obtains continually varying oscillating impulse waveform at output terminal (OUT); The low duration t of the pulse width of oscillating impulse pL=0.693*R12*CX, is determined by core end ground capacitance CX discharge time;
The high level lasting time t of the pulse width of oscillating impulse pH=0.693* (R11+R12) * CX, is determined by the duration of charging of core end ground capacitance CX, recurrence interval T=t pL+ t pH;
S204, output terminal (OUT) low and high level reading 555 timers draws output pulse frequency f, calculates the capacitance of core end electric capacity CX over the ground;
f = 1 l n 2 * ( R 11 + 2 R 12 ) * C X
If R11=R12, then C X = 1 3 l n 2 * f * R 11 .
9. the site assessment system of sensor is put in a kind of office according to claim 1, it is characterized in that,
Described radio receiving transmitting module is Zigbee module.
10. the site assessment system of sensor is put in a kind of office according to claim 2, it is characterized in that,
The shelf depreciation type signal that described signal generating module (1) produces comprises corona discharge signal, bubble-discharge signal, suspension electrode discharge signal and particulate discharge signal.
CN201510638447.6A 2015-09-30 2015-09-30 A kind of site assessment system of partial discharge sensor Active CN105277907B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510638447.6A CN105277907B (en) 2015-09-30 2015-09-30 A kind of site assessment system of partial discharge sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510638447.6A CN105277907B (en) 2015-09-30 2015-09-30 A kind of site assessment system of partial discharge sensor

Publications (2)

Publication Number Publication Date
CN105277907A true CN105277907A (en) 2016-01-27
CN105277907B CN105277907B (en) 2018-09-21

Family

ID=55147252

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201510638447.6A Active CN105277907B (en) 2015-09-30 2015-09-30 A kind of site assessment system of partial discharge sensor

Country Status (1)

Country Link
CN (1) CN105277907B (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106054092A (en) * 2016-05-23 2016-10-26 广东电网有限责任公司佛山供电局 GIS partial discharge sensor sensitivity tester
CN108020801A (en) * 2017-10-23 2018-05-11 中国南方电网有限责任公司超高压输电公司检修试验中心 GIL equipment built-in ultrahigh frequency transducer sensitivity nucleus correcting system and method
CN108427062A (en) * 2017-02-14 2018-08-21 丁晓东 Using the frequency conversion resonance vibration pressure-proof local discharge test device and method of intermittent drive
CN109490806A (en) * 2018-11-27 2019-03-19 南方电网科学研究院有限责任公司 A kind of detection method of sensor, system, device and readable storage medium storing program for executing
CN109541414A (en) * 2018-12-24 2019-03-29 南京海曼网络科技有限公司 A kind of site assessment system of partial discharge sensor

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1734272A (en) * 2005-08-26 2006-02-15 重庆大学 Online detector for partial discharge of gas-insulated substation and noise reduction method
JP2007163308A (en) * 2005-12-14 2007-06-28 Daihen Corp High frequency measurement system
CN103197212A (en) * 2013-03-29 2013-07-10 国家电网公司 Global information system (GIS) partial discharge on-line monitoring calibration instrument and configuration authentication method thereof
CN103278787A (en) * 2013-03-29 2013-09-04 国家电网公司 On-line GIS (gas-insulated switchgear) partial discharge monitoring and check method
CN203178464U (en) * 2013-03-29 2013-09-04 国家电网公司 GIS partial discharge online monitoring calibrator
CN203241526U (en) * 2013-03-28 2013-10-16 国家电网公司 Partial discharge signal generator
CN103472424A (en) * 2013-08-26 2013-12-25 云南电力试验研究院(集团)有限公司电力研究院 Method for testing performance of different types of partial discharge detector mainframes based on analog voltage signal injection

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1734272A (en) * 2005-08-26 2006-02-15 重庆大学 Online detector for partial discharge of gas-insulated substation and noise reduction method
JP2007163308A (en) * 2005-12-14 2007-06-28 Daihen Corp High frequency measurement system
CN203241526U (en) * 2013-03-28 2013-10-16 国家电网公司 Partial discharge signal generator
CN103197212A (en) * 2013-03-29 2013-07-10 国家电网公司 Global information system (GIS) partial discharge on-line monitoring calibration instrument and configuration authentication method thereof
CN103278787A (en) * 2013-03-29 2013-09-04 国家电网公司 On-line GIS (gas-insulated switchgear) partial discharge monitoring and check method
CN203178464U (en) * 2013-03-29 2013-09-04 国家电网公司 GIS partial discharge online monitoring calibrator
CN103472424A (en) * 2013-08-26 2013-12-25 云南电力试验研究院(集团)有限公司电力研究院 Method for testing performance of different types of partial discharge detector mainframes based on analog voltage signal injection

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
王增彬等: ""基于网络分析仪的GIS局部放电在线监测特高频传感器现场校核技术"", 《广东电力》 *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106054092A (en) * 2016-05-23 2016-10-26 广东电网有限责任公司佛山供电局 GIS partial discharge sensor sensitivity tester
CN108427062A (en) * 2017-02-14 2018-08-21 丁晓东 Using the frequency conversion resonance vibration pressure-proof local discharge test device and method of intermittent drive
CN108427062B (en) * 2017-02-14 2021-04-20 丁晓东 Frequency conversion resonance voltage-withstanding partial discharge test method adopting intermittent excitation
CN108020801A (en) * 2017-10-23 2018-05-11 中国南方电网有限责任公司超高压输电公司检修试验中心 GIL equipment built-in ultrahigh frequency transducer sensitivity nucleus correcting system and method
CN108020801B (en) * 2017-10-23 2020-01-03 中国南方电网有限责任公司超高压输电公司检修试验中心 GIL equipment built-in ultrahigh frequency sensor sensitivity field checking system and method
CN109490806A (en) * 2018-11-27 2019-03-19 南方电网科学研究院有限责任公司 A kind of detection method of sensor, system, device and readable storage medium storing program for executing
CN109541414A (en) * 2018-12-24 2019-03-29 南京海曼网络科技有限公司 A kind of site assessment system of partial discharge sensor

Also Published As

Publication number Publication date
CN105277907B (en) 2018-09-21

Similar Documents

Publication Publication Date Title
CN105277907A (en) On-site assessment system for partial discharge sensor
CN103558514B (en) Based on double-end cable oscillation wave partial discharge positioning system and the method for impulses injection
CN104422830B (en) Earth leakage protective device and creepage protection function detection method
CN202693735U (en) Ultrasonic and high-frequency local discharge detector
CN101975911B (en) Earth fault judging method for overhead line fault indicator
CN202133747U (en) Portable partial discharge detector
CN201903637U (en) Checking instrument for monitoring discharge counter on line
CN204044296U (en) A kind of partial discharge detecting system
CN103018642A (en) Detection method of Geographic Information System (GIS) local discharging ultrahigh-frequency online monitoring device
CN103235276B (en) Partial discharge signal generator
CN103439676B (en) A kind of method that UHF sensor sensitivity detects
CN203241526U (en) Partial discharge signal generator
CN102221664A (en) Grounding fault detection method of overhead high voltage circuit
CN101750540B (en) Method for detecting parasitic loop of transformer station direct current system
CN202661551U (en) Multifunctional miniwatt grounding impedance admeasuring apparatus
CN203825145U (en) Device for detecting partial discharge of terminal of on-site power cable
CN105891602A (en) GPS shunting phase-shifting test method and system for grounding device
CN104678259A (en) Single-phase earth fault finding device
Vigni et al. A two-end traveling wave fault location system for MV cables based on LoRa technology
CN105021961B (en) A kind of aerial insulated wire Partial Discharge Detection and positioning device and method
CN103983372A (en) Method for measuring operating temperature of power cable connector based on surface acoustic waves
RU107864U1 (en) Device for monitoring the state of fires of isolators of air transmission lines
CN203551678U (en) Online monitoring system of amorphous alloy tridimensional toroidal-core transformer
CN205374643U (en) Sensor security detection circuitry is put in office
CN104659919A (en) Distribution network operation support system and method of big data

Legal Events

Date Code Title Description
PB01 Publication
C06 Publication
SE01 Entry into force of request for substantive examination
C10 Entry into substantive examination
CB02 Change of applicant information

Address after: 211000 Suyuan Avenue, Jiangning Development Zone, Nanjing, Nanjing, Jiangsu Province, -5

Applicant after: State Grid Corporation of China

Applicant after: Jiangsu Electric Power Company

Applicant after: National network Jiangsu Electric Power Co., Ltd. maintenance branch

Address before: 211000 Suyuan Avenue, Jiangning Development Zone, Nanjing, Nanjing, Jiangsu Province, -5

Applicant before: State Grid Corporation of China

Applicant before: Jiangsu Electric Power Company

Applicant before: State Grid Jiangsu Electric Power Company Maintenance Branch Company

Address after: 211000 Suyuan Avenue, Jiangning Development Zone, Nanjing, Nanjing, Jiangsu Province, -5

Applicant after: State Grid Corporation of China

Applicant after: Jiangsu Electric Power Company

Applicant after: State Grid Jiangsu Electric Power Company Maintenance Branch Company

Address before: 211000 Suyuan Avenue, Jiangning Development Zone, Nanjing, Nanjing, Jiangsu Province, -5

Applicant before: State Grid Corporation of China

Applicant before: Jiangsu Electric Power Company

Applicant before: Maintenance Branch of Jiangsu Electric Power Company

CB02 Change of applicant information
GR01 Patent grant
GR01 Patent grant