CN206223915U - A kind of ground insulator discharge monitoring device of double-current sensor - Google Patents

A kind of ground insulator discharge monitoring device of double-current sensor Download PDF

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Publication number
CN206223915U
CN206223915U CN201621118489.3U CN201621118489U CN206223915U CN 206223915 U CN206223915 U CN 206223915U CN 201621118489 U CN201621118489 U CN 201621118489U CN 206223915 U CN206223915 U CN 206223915U
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China
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current sensor
unit
double
ground insulator
data acquisition
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CN201621118489.3U
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姚京松
董小青
吴军
林磊
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Hubei Super Power & Ultrahigh Pressure Electric Power Technology Development Co Ltd
State Grid Corp of China SGCC
Maintenance Branch of State Grid Hubei Electric Power Co Ltd
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Hubei Super Power & Ultrahigh Pressure Electric Power Technology Development Co Ltd
State Grid Corp of China SGCC
Maintenance Branch of State Grid Hubei Electric Power Co Ltd
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Abstract

The utility model provides a kind of ground insulator discharge monitoring device of double-current sensor, including:Current sensor unit, amplitude control and protection location, data acquisition unit, data transmission unit and power supply unit; wherein; the current sensor unit, amplitude control and protection location, the data acquisition unit, the data transmission unit are sequentially connected, and said supply unit is connected with the data acquisition unit and the data transmission unit;Using modularized design, integrated level is high, high degree of automation, and use double-current Sensor Design, avoid because current amplitude is excessive or cross a young waiter in a wineshop or an inn cannot accurate acquisition situation, whole system reliability is high, realizes the real time on-line monitoring and long range radio transmissions of power system transmission line ground insulator surface state and clearance discharge condition.

Description

A kind of ground insulator discharge monitoring device of double-current sensor
Technical field
The utility model belongs to power system transmission line state on_line monitoring technical field, more particularly to a kind of double-current The ground insulator discharge monitoring device of sensor.
Background technology
According to conventional design, power transmission line overhead ground wire gold utensil connected mode is generally included:The full earthing mode of ground wire hardware tool, Ground wire all insulation mode, anchor support one side earthing mode, anchor support bilateral earthing mode, tangent tower earthing mode etc..To reduce The energy loss of circuit, 500kV line grounding wires connection is general using anchor support one side earthing mode.To ensure thunder during thunderbolt ground wire The quick release of electric current, ground insulator cross-arm side is often connected with side of wire using gap.In operation maintenance in recent years Found in journey, because ground insulator earthing mode setup error, aeolian vibration cause clearance distance to diminish, in induced voltage Under continuous action, ground insulator gap is caused to be discharged for a long time, the phenomenon such as cause gap seriously get rusty, burn;Due to electric discharge Noise pollution, radio interference are brought, the normal life of resident and neighbouring wireless link near influence circuit, to line The safe operation on road leaves potential safety hazard.
Insulator leakage current can be measured by current sensor at present, but had because ground insulator discharges There is larger randomness, dynamic range is big, by several milliamperes to tens amperes, general current sensor is without such for size The large-scale linearity, it is difficult to accurate measurement.
Utility model content
In view of this, in order to overcome the deficiencies in the prior art, the utility model provides a kind of ground wire of double-current sensor Insulator arc-over monitoring device, can be measured by current sensor to insulator leakage current, and the degree of accuracy is high.
To achieve the above object, the technical solution of the utility model is as follows:
A kind of ground insulator discharge monitoring device of double-current sensor, including:Current sensor unit, amplitude control And protection location, data acquisition unit, data transmission unit and power supply unit, wherein, it is the current sensor unit, described Amplitude is controlled and protection location, the data acquisition unit, the data transmission unit are sequentially connected, said supply unit difference It is connected with the data acquisition unit and the data transmission unit.
Further, the current sensor unit is made up of the first current sensor and the second current sensor, wherein, institute State the first current sensor and second current sensor is controlled with the amplitude and protection location is in parallel.
Further, the range of first current sensor is 0.5 milliampere~1 peace;The amount of second current sensor Journey is that 0.5 peace~100 is pacified.
Further, the amplitude control and protection location are made up of first passage and second channel, wherein, described first leads to Road and the second channel are separate.
Further, the first passage is constrained by the first discharge tube, first resistor, second resistance, the first two-way transient electrical Diode processed and the first piezoresistor are constituted.
Further, the second channel is constrained by the second discharge tube, 3rd resistor, the 4th resistance, the second two-way transient electrical Diode processed and the second piezoresistor are constituted.
Further, first discharge tube, the first two-way transient voltage suppressor and the first pressure-sensitive electricity Resistance device is in parallel, and the first resistor is connected with first discharge tube and the first two-way transient voltage suppressor;Institute Second resistance is stated to be connected with first piezoresistor.
Further, second discharge tube, the second two-way transient voltage suppressor and the second pressure-sensitive electricity Resistance device is in parallel, and the 3rd resistor is connected with second discharge tube and the second two-way transient voltage suppressor;Institute The 4th resistance is stated to be connected with second piezoresistor.
Further, the data acquisition unit is connected to form by data acquisition unit and control mainboard by usb bus.
The beneficial effects of the utility model are:Using modularized design, integrated level is high, high degree of automation, and using double Current sensor is designed, it is to avoid because current amplitude is excessive or cross a young waiter in a wineshop or an inn cannot accurate acquisition situation, whole system reliability Height, realizes the real time on-line monitoring of power system transmission line ground insulator surface state and clearance discharge condition and long-range It is wirelessly transferred.
1) the utility model uses modularized design, and integrated level is high, high degree of automation, and current sensor configuration spirit It is living, larger current range can be covered, system reliability is high, and the synchronization for realizing the monitoring of ground insulator gap discharge waveform is adopted Collection and long range radio transmissions;
2) the ground insulator discharge monitoring device of this double-current sensor can obtain ground insulator gap it is complete not Distorted waveform data, to study gap discharge size, the discharge frequency of real-time monitoring ground insulator, diagnosis ground wire insulation is in shape State provides abundant data, realizes to the operating round-the-clock on-line real time monitoring of ground insulator state.
Brief description of the drawings
Fig. 1 is a kind of structural representation of the ground insulator discharge monitoring device of double-current sensor;
Fig. 2 is the structural representation of first passage;
Fig. 3 is the structural representation of second channel;
Wherein, 1, current sensor unit;2nd, amplitude control and protection location;3rd, data acquisition unit;4th, data transfer Unit;5th, power supply unit;101st, the first current sensor;102nd, the second current sensor;301st, data acquisition unit;302nd, control Mainboard;501st, solar panels;502nd, battery;6th, first passage;7th, second channel;2011st, the first discharge tube;2012nd, second Discharge tube;2021st, first resistor;2022nd, second resistance;2023rd, 3rd resistor;2024th, the 4th resistance;2031st, first is two-way Transient voltage suppressor;2032nd, the second two-way transient voltage suppressor;204th, the first piezoresistor;205th, Two piezoresistors.
Specific embodiment
In order that the purpose of this utility model, technical scheme and advantage become more apparent, below in conjunction with the accompanying drawings and implement Example, is further elaborated to the utility model.It should be appreciated that specific embodiment described herein is only used to explain this Utility model, is not used to limit the utility model.
As shown in figure 1, a kind of ground insulator discharge monitoring device of double-current sensor, including:Current sensor list The control of unit 1, amplitude and protection location 2, data acquisition unit 3, data transmission unit 4 and power supply unit 5, wherein, electric current is passed Sensor cell 1, amplitude control and protection location 2, data acquisition unit 3, data transmission unit 4 be sequentially connected, power supply unit 5 with Data acquisition unit 3 and data transmission unit 4 are connected.
Current sensor unit 1 is made up of the first current sensor 101 and the second current sensor 102, wherein, the first electricity The current sensor 102 of flow sensor 101 and second is controlled with amplitude and protection location 2 is in parallel, wherein, the first current sensor 101 is different with the range of the second current sensor 102, and the range of the first current sensor 101 is 0.5 milliampere~1 peace;Second electricity The range of flow sensor 102 is that 0.5 peace~100 is pacified.
Amplitude is controlled and protection location 2 is made up of first passage 6 and second channel 7, wherein, first passage 6 and second leads to Road 7 is separate.
As shown in Fig. 2 first passage 6 is by the first discharge tube 2011, first resistor 2021, second resistance 2022, first pair Constituted to the piezoresistor 204 of transient voltage suppressor 2031 and first.Wherein, the first fulgurite 2011, first is put two-way 2031 and first piezoresistor of transient voltage suppressor 204 is in parallel, the discharge tube 2011 of first resistor 2021 and first and First two-way transient voltage suppressor 2031 is connected;Second resistance 2022 is connected with the first piezoresistor 204.
As shown in figure 3, second channel 7 is by the second discharge tube 2012,3rd resistor 2023, the 4th resistance 2024, second pair Constituted to the piezoresistor 205 of transient voltage suppressor 2032 and second.Wherein, the second discharge tube 2012, second is two-way 2032 and second piezoresistor of transient voltage suppressor 205 is in parallel, the discharge tube 2012 of 3rd resistor 2023 and second and Second two-way transient voltage suppressor 2032 is connected;4th resistance 2024 is connected with the second piezoresistor 205.
As shown in figure 1, data acquisition unit 3 is connected with control mainboard 302 by data acquisition unit 301 by usb bus.
A kind of operation principle of the ground insulator discharge monitoring device of double-current sensor is:
It is same that the first current sensor 101 and the second current sensor 102 in current sensor unit 1 are installed in steel tower On one position, the earth current on real-time collecting ground wire, the range of the first current sensor 101 is 0.5 milliampere~1 peace, second The range of current sensor 102 is 0.5 milliampere~1 peace.Current sensor unit 1 is passed after current signal is converted into voltage signal Enter amplitude control and protection location 2, amplitude control and the effect of protection location 2 have at 2 points, one, prevent lightning surge to equipment Damage, two, the magnitude of voltage of limitation input data collecting unit 3.If be struck by lightning near transmission line of electricity, will instantaneously produce huge Big energy, overvoltage enters the first discharge tube 2011 or the second discharge tube 2012, the first electric discharge by current sensor unit 1 , by quick release major part energy, remaining energy is by the electricity of first resistor 2021, second for the discharge tube 2012 of pipe 2011 or second The resistance 2022, resistance 2024 of 3rd resistor 2023 and the 4th, steepness is further reduced, and two poles are suppressed by the first two-way transient voltage During the two-way transient voltage suppressor 2032 of pipe 2031 or the second, dump energy is by the first two-way transient voltage suppressor 2031 or the quick release of the second two-way transient voltage suppressor 2032.Under normal circumstances, from current sensor unit 1 Voltage signal will not trigger the first discharge tube 2011 or the second discharge tube 2012 and the first two-way transient voltage suppressor 2031 or second two-way transient voltage suppressor 2032 conducting, can smoothly incoming first piezoresistor 204 or the second Piezoresistor 205, wherein, the effect of the first piezoresistor 204 and the second piezoresistor 205 be the control of control amplitude and The output voltage of protection location 2, wherein, the first piezoresistor 204 can suppress in 5V voltage, the second piezoresistor 205 Voltage can be suppressed in 10V.
When voltage signal from amplitude control and protection location 2 enters data acquisition unit 3, data acquisition unit 3 will Analog signal changes into data signal by the incoming control mainboard 302 of usb bus, and control mainboard 302 can control control mainboard 302 and adopt The passage of sample speed, data storage and data can be sent to network interface, control mainboard 302 received from data acquisition unit 3 Size after data according to voltage magnitude judges valid data, and the data of first passage 6 are to have if voltage magnitude is less than 5V Effect data, if amplitude is more than 5, the data of second channel 7 are valid data, and control mainboard 302 is by valid data by compiling Feeding data transmission unit 4 reaches distal end after code the server of fixed ip address.The ground insulator of double-current sensor is put Power utilization monitoring device provides power supply by power supply unit 5, wherein, power supply unit 5 is made up of solar panels 501 and battery 502.Power supply Unit 5 can be converted solar energy into electrical energy.
A kind of workflow of the ground insulator discharge monitoring device of double-current sensor is as follows:
It is same that the first current sensor 101 and the second current sensor 102 in current sensor unit 1 are installed in steel tower On one position, the earth current on real-time collecting ground wire, current sensor unit 1 is passed after current signal is converted into voltage signal Enter amplitude control and protection location 2, voltage signal will by entering data acquisition unit 3, data acquisition unit 3 after amplitude limitation Analog signal being changed into after control to encode current data by control mainboard 302 after data signal and reached by data transmission unit 4 There is the server of fixed ip address distal end.
Embodiment described above only expresses implementation method of the present utility model, and its description is more specific and detailed, but simultaneously Therefore the limitation to the utility model the scope of the claims can not be interpreted as.It should be pointed out that for the ordinary skill of this area For personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these belong to this The protection domain of utility model.Therefore, the protection domain of the utility model patent should be determined by the appended claims.

Claims (9)

1. a kind of ground insulator discharge monitoring device of double-current sensor, it is characterised in that including:Current sensor list Unit, amplitude control and protection location, data acquisition unit, data transmission unit and power supply unit, wherein, the current sense Device unit, amplitude control and protection location, the data acquisition unit, the data transmission unit are sequentially connected, described Power supply unit is connected with the data acquisition unit and the data transmission unit respectively.
2. the ground insulator discharge monitoring device of a kind of double-current sensor according to claim 1, it is characterised in that: The current sensor unit is made up of the first current sensor and the second current sensor, wherein, first current sense Device and second current sensor is controlled with the amplitude and protection location is in parallel.
3. the ground insulator discharge monitoring device of a kind of double-current sensor according to claim 2, it is characterised in that: The range of first current sensor is 0.5 milliampere~1 peace;The range of second current sensor is 0.5 peace~100 Peace.
4. the ground insulator discharge monitoring device of a kind of double-current sensor according to claim 1, it is characterised in that: The amplitude control and protection location are made up of first passage and second channel, wherein, the first passage and described second leads to Road is separate.
5. the ground insulator discharge monitoring device of a kind of double-current sensor according to claim 4, it is characterised in that: The first passage is by the first discharge tube, first resistor, second resistance, the first two-way transient voltage suppressor and the first pressure Sensitive resistor is constituted.
6. the ground insulator discharge monitoring device of a kind of double-current sensor according to claim 4, it is characterised in that: The second channel is by the second discharge tube, 3rd resistor, the 4th resistance, the second two-way transient voltage suppressor and the second pressure Sensitive resistor is constituted.
7. the ground insulator discharge monitoring device of a kind of double-current sensor according to claim 5, it is characterised in that: First discharge tube, the first two-way transient voltage suppressor and first piezoresistor are in parallel, and described the One resistance is connected with first discharge tube and the first two-way transient voltage suppressor;The second resistance with it is described First piezoresistor is connected.
8. the ground insulator discharge monitoring device of a kind of double-current sensor according to claim 6, it is characterised in that: Second discharge tube, the second two-way transient voltage suppressor and second piezoresistor are in parallel, and described the Three resistance are connected with second discharge tube and the second two-way transient voltage suppressor;4th resistance with it is described Second piezoresistor is connected.
9. the ground insulator discharge monitoring device of a kind of double-current sensor according to claim 1, it is characterised in that: The data acquisition unit is connected to form by data acquisition unit and control mainboard by usb bus.
CN201621118489.3U 2016-10-13 2016-10-13 A kind of ground insulator discharge monitoring device of double-current sensor Active CN206223915U (en)

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Application Number Priority Date Filing Date Title
CN201621118489.3U CN206223915U (en) 2016-10-13 2016-10-13 A kind of ground insulator discharge monitoring device of double-current sensor

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Application Number Priority Date Filing Date Title
CN201621118489.3U CN206223915U (en) 2016-10-13 2016-10-13 A kind of ground insulator discharge monitoring device of double-current sensor

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107526010A (en) * 2017-09-30 2017-12-29 南京国电南自电网自动化有限公司 A kind of distributed small current earthing wire-selecting method based on double CT samplings

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107526010A (en) * 2017-09-30 2017-12-29 南京国电南自电网自动化有限公司 A kind of distributed small current earthing wire-selecting method based on double CT samplings

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