CN208026827U - Cable run partial discharge monitoring device - Google Patents
Cable run partial discharge monitoring device Download PDFInfo
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- CN208026827U CN208026827U CN201820230467.9U CN201820230467U CN208026827U CN 208026827 U CN208026827 U CN 208026827U CN 201820230467 U CN201820230467 U CN 201820230467U CN 208026827 U CN208026827 U CN 208026827U
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Abstract
The utility model provides a kind of cable run partial discharge monitoring device, which includes：Detection module be set on cable run and/or ground wire return wire on, including polarization light unit, Fibre Optical Sensor unit and luminous intensity measurement unit；Light unit is polarized, the polarised light group including at least two polarised lights is used to form, using polarization light unit output end light intensity value as the first light intensity value；Fibre Optical Sensor unit is connect with polarization light unit, is used for transmission polarised light；Luminous intensity measurement unit is connect with Fibre Optical Sensor unit, for carrying out coherent superposition to the polarised light after Fibre Optical Sensor unit, using luminous intensity measurement unit output end light intensity value as the second light intensity value；Host computer is connect with detection module, for being worth to Partial Discharge Detection result according to the first light intensity value and the second light intensity.Detection module is able to detect that the local discharge signal in bigger frequency range, and can monitor shelf depreciation situation in real time, improves the accuracy of Partial Discharge Detection.
Description
Technical field
The utility model is related to power equipment state monitoring technical fields, and in particular to a kind of cable run shelf depreciation prison
Survey device.
Background technology
With the development of economic progress and power industry, extruded type power cable line is because its outstanding advantages is in transmission and distribution network
Each voltage class in gradually replace overhead transmission line, become the backbone framework in transmission and distribution network.At the same time, it is guarantee power grid
Stable operation, the state of insulation and ageing state of transmission line of electricity are increasingly taken seriously.In extruded type power cable, locally put
Electrical phenomena is one of the principal element of its insulation damages and insulation ag(e)ing.Insulation defect in extruded type cable system is (such as sky
Cave, impurity, water tree etc.) shelf depreciation may occur under the action of electric field, and cause under certain operating mode defect into
One step develops.Shelf depreciation is the important characterization of insulation defect, and one of the main reason for promote insulation degradation, measuring apparatus
Shelf depreciation can in time, accurately grasp cable run and the state of insulation of system.
The evolution of shelf depreciation except having outside the Pass with insulation defect itself, also with the close phase of cable run operating condition
It closes.Change in frequent cable run in load, under the Thermal Stress effect persistently changed, cable conductor, insulating layer occur
Expand with heat and contract with cold, may inside cable insulation, formed and split inside cable body and cable accessory medium interface, cable accessory
The cable actual motion service life is shortened in line or micropore, accelerated material aging.Above-mentioned phenomenon is from new energy (such as wind energy, the sun
Can) electric energy transmitting scene in cable and cable accessory become apparent：It, may in one day due to the randomness of generation of electricity by new energy
Multiple load fluctuation occurs, caused by thermal shock it is more frequent and severe compared with other application occasion；Above-mentioned phenomenon is to cause to be used for
One of the main reason for cable system failure is occurred frequently in electric energy transmission based on new energy.
It is presently used for the main acoustic emission method of monitoring method and Electromagnetic coupling method of cable run shelf depreciation, correlation prison
Survey method is mostly disposed about sensor (such as uhf sensor, High Frequency Current Sensor, sonac) in cable accessory
To measure the local discharge signal occurred in electric cable fitting, and the pulse train (Phase offered an explanation by phase
Resolved Pluse Sequence, are abbreviated as PRPS), phase explanation shelf depreciation (Phase Resolved Partial
Discharge is abbreviated as PRPD) the methods of collection of illustrative plates analysis state of insulation and variation tendency.The primary limitation of the above monitoring method
Property be sensor covering band limits it is limited, generally between 300kHz to 300MHz, and at the beginning of cable run shelf depreciation
The frequency range of beginning signal is not often within the scope of this, and when detecting shelf depreciation in aforementioned manners, cable accessory is often
Be developed to can not service mode, therefore, the above method is typically only capable to prevent in the target of Partial Discharge Detection/monitoring of cable system
Model fault spread caused by shelf depreciation reason；Meanwhile the above method also has ignored shelf depreciation and cable running conditions
Between relationship, for the frequent cable run of load variations, the information of above-mentioned monitoring method is sufficiently complete；These are led
Cause the accuracy of Partial Discharge Detection low.
Utility model content
In view of this, the utility model embodiment provides a kind of cable run partial discharge monitoring device, method, terminal
And readable storage medium storing program for executing, to solve the problems, such as that cable run Partial Discharge Detection accuracy is low in the prior art.
For this purpose, the utility model embodiment provides following technical solution：
The utility model embodiment in a first aspect, provide a kind of cable run partial discharge monitoring device, including：Detection
Module and host computer, wherein
The detection module be set on cable run and/or ground wire return wire on, for local discharge signal carry out
Detection, the detection module include polarization light unit, Fibre Optical Sensor unit and luminous intensity measurement unit；
The polarization light unit is used to form polarised light group, and the polarised light group includes at least two polarised lights, will be described
The light intensity value of the polarised light of light unit output end is polarized as the first light intensity value；
The Fibre Optical Sensor unit is connect with the polarization light unit, the polarization being used for transmission in the polarised light group
Light；
The luminous intensity measurement unit is connect with the Fibre Optical Sensor unit, for after the Fibre Optical Sensor unit
The polarised light in the polarised light group carries out coherent superposition, by the polarised light of the luminous intensity measurement unit output end
Light intensity value is as the second light intensity value；
The host computer is connect with the detection module, for according to first light intensity value and second light intensity value
Obtain Partial Discharge Detection result.
Optionally, the detection module further includes：Phase modulation unit is connect with the polarization light unit, and with it is described
Fibre Optical Sensor unit connects, for the polarised light phase difference in the polarised light group to be modulated to preset value.
Optionally, when the polarised light group includes two polarised lights, the preset value is 90 degree.
Optionally, the Fibre Optical Sensor unit spiral is set to the inside of the cable run stress cone；And/or spiral
It is set on the lateral wall of the ground wire return wire.
Optionally, the number of turns for the Fibre Optical Sensor unit that the sensitivity of the detection module is arranged according to spiral determines.
Optionally, the polarization light unit is connect by optical fiber with the Fibre Optical Sensor unit；And/or the light intensity is surveyed
Amount unit is connect by optical fiber with the Fibre Optical Sensor unit.
Optionally, further include：Hub is connect with the detection module, and is connect with the host computer, for collecting
It states detection module output valve and the output valve is sent to the host computer.
Optionally, further include：Photoelectric conversion module is connect with the detection module, and is connect with the host computer, is used for
First light intensity value and second light intensity value are respectively converted into the first value of electrical signals and the second value of electrical signals, it is described upper
Machine is additionally operable to obtain Partial Discharge Detection result according to first value of electrical signals and second value of electrical signals.
The utility model embodiment second aspect provides cable run partial discharge monitoring method, includes the following steps：
Obtain the first light intensity value and the second light intensity value；Wherein, first light intensity value is that light unit output end is polarized in detection module
Polarised light light intensity value, second light intensity value be the detection module in luminous intensity measurement unit output end the polarised light
Light intensity value, the detection module be set on cable run and/or ground wire return wire on；According to first light intensity value and institute
It states the second light intensity and is worth to Partial Discharge Detection result.
Optionally, the step of Partial Discharge Detection result being worth to according to first light intensity value and second light intensity
In, including：Calculate the difference of first light intensity value and second light intensity value；Partial Discharge Detection is obtained according to the difference
As a result.
Optionally, in the step of difference of calculating first light intensity value and second light intensity value, including：By described
One light intensity value is converted to the first value of electrical signals, and second light intensity value is converted to the second value of electrical signals；Calculate first telecommunications
Number value and second value of electrical signals difference.
Optionally, in the step of obtaining Partial Discharge Detection result according to the difference, including：According to the mathematic interpolation
The change rate of the difference；Partial Discharge Detection result is obtained according to the change rate.
The utility model embodiment third aspect provides a kind of terminal, including：At least one processor；And with institute
State the memory of at least one processor communication connection；Wherein, be stored with can be by least one processor for the memory
The instruction of execution, described instruction is executed by least one processor, so that at least one processor executes this practicality
Any method in new embodiment second aspect.
The utility model embodiment fourth aspect provides a kind of computer readable storage medium, is stored thereon with calculating
The step of machine instructs, which realizes any the method in the utility model embodiment second aspect when being executed by processor.
The utility model embodiment technical solution, has the following advantages that：
Cable run partial discharge monitoring device, method, terminal and the readable storage medium that the utility model embodiment provides
Matter, the wherein device include：Detection module and host computer, wherein the detection module is set on cable run and/or ground wire
On return wire, for being detected to local discharge signal, the detection module include polarization light unit, Fibre Optical Sensor unit with
And luminous intensity measurement unit；The polarization light unit, is used to form polarised light group, and the polarised light group includes at least two polarizations
Light, using the light intensity value of the polarised light of the polarization light unit output end as the first light intensity value；The Fibre Optical Sensor unit
It is connect with the polarization light unit, the polarised light being used for transmission in the polarised light group；The luminous intensity measurement unit and institute
State Fibre Optical Sensor unit connection, for the polarised light in the polarised light group after the Fibre Optical Sensor unit into
Row coherent superposition, using the light intensity value of the polarised light of the luminous intensity measurement unit output end as the second light intensity value；On described
Position machine, connect with the detection module, for being worth to shelf depreciation inspection according to first light intensity value and second light intensity
Survey result.Detection module is set on cable run and ground wire return wire, and detection module utilizes Faraday magnetooptical effect principle pair
The shelf depreciation of cable run is detected, the local discharge signal being able to detect that in bigger frequency range, and can be real-time
Shelf depreciation situation is monitored, the accuracy of Partial Discharge Detection is improved.
Description of the drawings
It, below will be right in order to illustrate more clearly of specific embodiment of the present invention or technical solution in the prior art
Specific implementation mode or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, it is described below
In attached drawing be that some embodiments of the utility model are not paying creativeness for those of ordinary skill in the art
Under the premise of labour, other drawings may also be obtained based on these drawings.
Fig. 1 is showing according to a specific example of the cable run partial discharge monitoring device of the utility model embodiment
It is intended to；
Fig. 2 is another specific example according to the cable run partial discharge monitoring device of the utility model embodiment
Schematic diagram；
Fig. 3 is the stream according to a specific example of the cable run partial discharge monitoring method of the utility model embodiment
Cheng Tu；
Fig. 4 be according to the cable run partial discharge monitoring method of the utility model embodiment according to the first light intensity value and
Second light intensity is worth to the flow chart of a specific example of Partial Discharge Detection result；
Fig. 5 be according to the cable run partial discharge monitoring method of the utility model embodiment according to the first light intensity value and
Second light intensity is worth to the flow chart of another specific example of Partial Discharge Detection result；
Fig. 6 is the hardware architecture diagram for the terminal that the utility model embodiment provides.
Reference numeral：
1, detection module；11, light unit is polarized；12, Fibre Optical Sensor unit；13, luminous intensity measurement unit；14, phase-modulation
Unit；2, host computer；3, cable run stress cone；4, ground wire return wire；6, optical fiber；7, photoelectric conversion module；8, hub.
Specific implementation mode
The technical solution of the utility model is clearly and completely described below in conjunction with attached drawing, it is clear that described
Embodiment is the utility model a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, originally
The every other embodiment that field those of ordinary skill is obtained without making creative work, belongs to this practicality
Novel protected range.
It is in the description of the present invention, it should be noted that term "center", "upper", "lower", "left", "right", " perpendicular
Directly ", the orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, and is only
The utility model and simplifying describes for ease of description, do not indicate or imply the indicated device or element must have it is specific
Orientation, with specific azimuth configuration and operation, therefore should not be understood as limiting the present invention.In addition, term " the
One ", " second ", " third " are used for description purposes only, and are not understood to indicate or imply relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be mechanical connection, can also be electrical connection；Can be directly connected, can also indirectly connected through an intermediary,
It can also be the connection inside two elements, can be wirelessly connected, can also be wired connection.For the common skill of this field
For art personnel, the concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.
In addition, as long as technical characteristic involved in the utility model different embodiments disclosed below is each other
Not constituting conflict can be combined with each other.
A kind of cable run partial discharge monitoring device is provided in the utility model embodiment, coordinates novel cable circuit
Integrated system, full-fiber sensor is built-in with inside the stress cone of above-mentioned novel cable, the part of cable run is put in realization
Pyroelectric monitor, as shown in Figure 1, the partial discharge monitoring device includes：Detection module 1 and host computer 2, wherein
Detection module 1 is set on the inside and ground wire return wire 4 of cable run stress cone 3, for believing shelf depreciation
It number is detected, detection module 1 includes polarization light unit 11, Fibre Optical Sensor unit 12 and luminous intensity measurement unit 13.
Light unit 11 is polarized, polarised light group is used to form, polarised light group includes at least two polarised lights, will polarize light unit
The light intensity value of the polarised light of 11 output ends is as the first light intensity value.In the present embodiment, polarised light group includes two polarised lights, when
So, in other embodiments, polarised light group can also include three even more polarised lights, and polarised light number is more, detection
Sensitivity it is higher, as needed rationally setting.In the present embodiment, since laser has been in most cases polarization
Light, in order to reduce production cost, polarization light unit 11 is laser, and certainly, in other embodiments, polarization light unit 11 can also
Using ordinary light source and the polarizer, the polarizer can be polarizing film or Nicol prism etc., and the polarizer is used to turn ordinary light source
It is changed to polarised light, as needed rationally setting.In the present embodiment, made using the lower laser light source of opposite acquisition cost
For first light source and second light source, first light source as the first polarised light, second light source as the second polarised light, first light source and
The output wavelength preferred scope of second light source is 635nm to 660nm, and preferred value is 650nm, other wave-length coverages also not by
Limitation, reality in the middle can be according to cost preferred wavelength ranges.First light source and the setting of the output intensity maximum value of second light source
For 0.005 watt (to meet safe laser power, ensureing that input light intensity does not cause to damage to human body and other equipment), light intensity value
Measurement range it is unrestricted.Light intensity defines the time average of generally luminous energy current density, and unit is consistent with energy-flux density, i.e.,
The energy of unit area is flowed through in unit interval, unit is watt/square metre (w/m2).It is strong using optical detector exploring laser light
All power detected in section are often all received, are generally the laser power measured by degree.Due to laser beam radially light
It is unevenly distributed by force, if seeking the average intensity for cutting inner face, the luminous power divided by laser sectional area measured can be used.Due to most
Laser light source is therefore point light source generally also uses energy unit's -- watt -- to characterize light intensity in the case of number.Currently, international
On think that power in 0.005 watt of laser below is safe light intensity (from U.S.'s food and drug safety management bureau FDA), no
Human body can be damaged.
In the present embodiment, the first light can be calculated according to the input light intensity value of the first polarised light and the second polarised light
Intensity values, such as light intensity value of the first polarised light are 0.003 watt, and the light intensity value of the second polarised light is 0.004 watt, due to the two
Angle is 90 degree, then its value is 0.005 watt after the first light intensity value is computed.
Fibre Optical Sensor unit 12 is connect with polarization light unit 11, the polarised light being used for transmission in polarised light group.In this implementation
In example, 12 spiral of Fibre Optical Sensor unit is set to the inside of cable run stress cone 3 and spiral is set to the outer of ground wire return wire 4
On side wall, spiral is arranged so that the arrangement of Fibre Optical Sensor unit 12 is more regular and detection result is more excellent；Certainly, in other implementations
In example, the winding of Fibre Optical Sensor unit 12 or other forms, as the concentric circles of analogous cable pallet canoe increases
Coiling diameter mode is wound, and the beginning and end trend for winding shape is consistent with the trend of Induced magnetic field, to ensure to lead to wherein
The light crossed is consistent with the direction of Induced magnetic field.The circle for the Fibre Optical Sensor unit 12 that the sensitivity of detection module 1 is arranged according to spiral
Number determines that more around the number of turns, sensitivity is higher, and in the present embodiment, the preferred scope around the number of turns is 20-50, preferred value
It is 30, the selected principle of the number of turns is advisable with the outer contour around/package semiconductive stress cone, and rationally setting is as needed
It can.In the present embodiment, Fibre Optical Sensor unit 12 is full-fiber sensor；Certainly, in other embodiments, or light
Fibre, as long as light conductive loop can be formed.
Luminous intensity measurement unit 13 is connect with Fibre Optical Sensor unit 12, for the polarised light after Fibre Optical Sensor unit 12
Polarised light in group carries out coherent superposition, using the light intensity value of the polarised light of 13 output end of luminous intensity measurement unit as the second light intensity
Value.In the present embodiment, luminous intensity measurement unit 13 is light power meter, and the second light intensity value can directly be measured by light power meter
It arrives；Certainly, in its embodiment, luminous intensity measurement unit 13 or polarised light angle measuring unit, such as analyzer first detect
To polarised light angle, then according to the input light intensity value of polarised light angle, the first polarised light and the second polarised light detected, meter
Calculation obtains the second light intensity value.
The range of second light intensity value determines by the size of the first polarised light and the input light intensity value of the second polarised light, such as first
The light intensity value of polarised light is 0.003 watt and the light intensity value of the second polarised light is 0.004 watt, then the minimum value of the second light intensity value
Subtract each other (two polarised light angles are 180 degree) for the first polarised light and the second polarised light light intensity value, maximum value is the first polarised light
It is added with the second polarised light light intensity value (two polarised light angles are 0 degree), therefore ranging from the 0.001~0.007 of the second light intensity value
Watt.
Host computer 2 is connect with detection module 1, for being worth to shelf depreciation inspection according to the first light intensity value and the second light intensity
Survey result.When thering is leakage current to flow through on the inside of cable run stress cone or ground wire return wire, leakage current formation magnetic field, two
Polarised light angle after Fibre Optical Sensor unit 12 can be not equal to 90 degree, then the second light intensity after the synthesis of luminous intensity measurement unit 13
Value is not equal to the first light intensity value；And with the increase of leakage current, the difference of the second light intensity value and the first light intensity value is also got over therewith
Greatly, shelf depreciation is more serious.When having leakage current to flow through on cable accessory or on ground wire return wire, the second light intensity value is equal to first
Light intensity value.
Detection module is arranged on cable run and ground wire return wire in above-mentioned cable run partial discharge monitoring device, inspection
It surveys module to be detected the shelf depreciation of cable run using Faraday magnetooptical effect principle, is able to detect that bigger frequency model
Interior local discharge signal is enclosed, and shelf depreciation situation can be monitored in real time, improves the accuracy of Partial Discharge Detection.
On the basis of the above embodiments, for the ease of adjusting the phase angle between polarised light, as shown in Fig. 2, detection mould
Block 1 further includes phase modulation unit 14, is connect with polarization light unit 11, and connect with Fibre Optical Sensor unit 12, for that will polarize
Polarised light phase difference in light group is modulated to preset value.In the present embodiment, phase modulation unit 14 is phase-modulator, polarization
Light group includes two polarised lights, and preset value is set as 90 degree for the ease of control, certainly, in other embodiments, preset value
Other values, such as 60 degree are may be set to be, as needed rationally setting.
In the present embodiment, as shown in Fig. 2, polarization light unit 11 is connect by optical fiber 6 with Fibre Optical Sensor unit 12, light intensity
Measuring unit 13 is connect by optical fiber 6 with Fibre Optical Sensor unit 12, so that installation is more flexible convenient；Certainly, other
It in embodiment, can also be directly connected to, as needed rationally setting.
On the basis of the above embodiments, as shown in Fig. 2, due to the processing to electric signal is more convenient and accuracy more
Height, partial discharge monitoring device further include photoelectric conversion module 7, are connect with detection module 1, and connect with host computer 2, and being used for will
First light intensity value and the second light intensity value are respectively converted into the first value of electrical signals and the second value of electrical signals, and host computer 2 is additionally operable to basis
First value of electrical signals and the second value of electrical signals obtain Partial Discharge Detection result.In the present embodiment, photoelectric conversion module 7 is light
Electric transducer, the first value of electrical signals and the second value of electrical signals are voltage value, and such as the first light intensity value is 0.004 the first electricity of watt-hour
Signal value is 4 volts, and the second light intensity value is 0.005 watt-hour, and the second value of electrical signals is 5 volts；Certainly, in other embodiments
In, current value is may be set to be, as needed rationally setting.
Since the number of the cable run stress cone in cable system is more and dispersed distribution, in order to save production cost,
Convenient for collecting the signal on each position and being uploaded to host computer 2, on the basis of the above embodiments, as shown in Fig. 2, part is put
Power utilization monitoring device further includes hub 8, is connect with detection module 1, and is connect with host computer 2, is exported for collecting detection module 1
Output valve is simultaneously sent to host computer 2 by value.
Above-mentioned partial discharge monitoring device, according to magneto-optic effect principle, in the internal spiral cloth of cable run stress cone
Full-fiber sensor is set, introducing/lead-out wire is set；Spiral-shaped arrangement all -fiber is also pressed on the ground wire return wire of cable system
Introducing/lead-out wire is equally arranged in sensor；Introducing/lead-out wire of the inside of cable run stress cone is respectively connected to polarised light
Source and polarised light receiving side, polarised light source include polarization light unit, and polarised light receiving side includes luminous intensity measurement unit, signal
Processing system, hub, upper host.The partial discharge monitoring device is in ground potential, and arrangement is convenient.
The ground wire reflux laid when being built in the installation of full-fiber sensor and cable system inside stress cone or later
The main function of line full-fiber sensor is to form polarization optical channel.According to Faraday magnetooptical effect principle, sent out by laser light source
The phase modulated device of light gone out is divided into the polarised light that two polarization axles differ 90 ° after completing modulation, is transmitted through the fiber to full light
Fiber sensor, later two beam polarised lights be transmitted through the fiber to luminous intensity measurement unit again, be concerned in luminous intensity measurement unit
Superposition, the signal after superposition are sent into signal processing system and carry out signal processing.When there is no current flowing, two beams inclined in cable conductor
Shaking, the relative propagation velocity of light in a fiber is equal, and the light detected in luminous intensity measurement unit at this time does not have in coherent superposition
There is phase difference.When having electric current to flow through in cable conductor, Induced magnetic field is formed around conductor, under this magnetic fields, is passed through
The relative velocity of two beam polarised lights of full-fiber sensor changes, and light forms phase difference, so as to cause luminous intensity measurement list
The light intensity being superimposed in first changes.
The operation principle of above-mentioned partial discharge monitoring device is specific as follows：
When cable run works normally, there is no shelf depreciation in cable run, at this time in cable conductor system
Only no current and there are two kinds of situations of electric current, wherein when having electric current to flow through, power frequency is consistent with the electric system attribute of cable, is
Power frequency system or straight-flow system.At this point, the light intensity changing value detected in luminous intensity measurement unit is stationary value.
When in cable insulation system occur shelf depreciation when, Partial Discharge Sources generate electric current or through conductor side or through ground wire
Return wire flows out, and shelf depreciation electric current or is superimposed upon in conductor current at this time, or directly form earth-current, including it is following this two
Kind situation：When local discharge current is superimposed upon on conductor, (power frequency is straight by former stable frequency part for the electric current propagated on conductor
Stream) it is superimposed and to be formed with high frequency/random frequency-portions, it directly contributes Induced magnetic field and also consists of two parts, the light detected at this time
Strong changing value becomes variable quantity；When no current circulates in cable conductor, changes of magnetic field caused by earth-current causes to flow through ground wire
Two polarised lights of return wire full-fiber sensor form phase difference, and the light intensity changing value nor stationary value detected at this time.
The shelf depreciation that full-fiber sensor can be flowed through with equivalent detection in the way of detection light intensity changing value by principles above is generated
Shelf depreciation current signal.
The cable run partial discharge monitoring device that the utility model embodiment provides has the characteristics that：1. monitoring device
It is formed and is optically isolated between cable run, the electromagnetic interference being subject to without usual partial discharge detecting system；2. due to only right
The current sense of full-fiber sensor is flowed through, external electromagnetic noise does not influence the local discharge signal recognition effect of the present apparatus；③
Due to without ferromagnetic material, there is no nonlinear problem caused by magnetic saturation effect in total system in sensor；4. the recognizable institute of theory
There is frequency range local discharge signal；5. alternating current-direct current cable system can be suitable for simultaneously；6. can be suitable for simultaneously online, offline inspection/
Monitoring system；7. accuracy of detection is related with the deflection angle of polarised light after detection, typically to increase the light of spiral winding shape
The number of turns of fiber sensor.
A kind of cable run partial discharge monitoring method is additionally provided in the utility model embodiment, is applied to above-mentioned cable
In circuit partial discharge monitoring device, as shown in figure 3, the flow includes the following steps：
S1：Obtain the first light intensity value and the second light intensity value；Wherein, the first light intensity value is polarised light list in detection module 1
The light intensity value of the polarised light of first 11 output ends, the second light intensity value are the polarization of 13 output end of luminous intensity measurement unit in detection module 1
The light intensity value of light, detection module 1 be set on cable run and/or ground wire return wire on.In the present embodiment, detection module 1
Be set on cable run and ground wire return wire on.
It includes the first laser and second laser that two angles are 90 degree to polarize light unit 11, and first laser is as the first light
Source (i.e. the first polarised light), second laser will polarize the light of 11 output end of light unit as second light source (i.e. the second polarised light)
For intensity values as the first light intensity value, light source forms two polarised lights that phase difference is 90 degree after phase-modulator, passes through optical fiber
Polarised light is transmitted in full-fiber sensor, full-fiber sensor spiral is set to inside and the ground wire of cable run stress cone
On the lateral wall of return wire, polarised light carries out polarised light in luminous intensity measurement unit 13 after full-fiber sensor and is concerned with
Superposition, using the light intensity value of 13 output end of luminous intensity measurement unit as the second light intensity value.
S2：It is worth to Partial Discharge Detection result according to the first light intensity value and the second light intensity.
When cable run works normally, i.e., there is no shelf depreciation in cable run, electricity when cable transmission electric energy
Cable conductor has electric current to flow through, and power frequency is consistent with the electric system attribute of cable, and power frequency or DC characteristic is presented, and light intensity is surveyed at this time
The light intensity changing value detected in amount unit 13 is stationary value；When shelf depreciation occurs for cable run, what Partial Discharge Sources generated
Pulse current is flowed out through cable conductor or through ground wire return wire, shelf depreciation electric current or is superimposed upon in conductor current at this time,
Or earth-current is directly formed, the light intensity changing value detected under both of these case is unstable value.
As a kind of specific embodiment, above-mentioned steps S2 is as shown in figure 4, include：
S21：Calculate the difference of the first light intensity value and the second light intensity value；
As a kind of specific embodiment, above-mentioned steps S21 is as shown in figure 5, include：
S211：First light intensity value is converted into the first value of electrical signals, the second light intensity value is converted to the second value of electrical signals.Pass through
Light intensity value is converted to corresponding value of electrical signals by photoelectric conversion module.
S212：Calculate the difference of the first value of electrical signals and the second value of electrical signals.
S22：Partial Discharge Detection result is obtained according to difference.
As a kind of specific embodiment, above-mentioned steps S22 is as shown in figure 5, include：
S221：According to the change rate of mathematic interpolation difference；
S222：Partial Discharge Detection result is obtained according to change rate.The relationship of change rate and discharge examination result such as changes
Rate is bigger, and electric discharge is more serious etc..
Through the above steps, contrasting detection module light intensity signal situation of change, detection module are arranged in cable run and ground
It is detected on line return wire and using Faraday magnetooptical effect principle to the shelf depreciation of cable run, is changed according to light intensity
Situation can quickly and accurately determine partial discharge position and size, the shelf depreciation being able to detect that in bigger frequency range
Signal, and shelf depreciation situation can be monitored in real time, improve the accuracy of Partial Discharge Detection.
Screw arrangement is installed in the accessory hardware of the cable system of the high substation of the ambient noises such as electromagnetic noise etc.
Fibre optical sensor and in the ground wire return-flow system of this cable run install screw arrangement fibre optical sensor；Use cable
The optical fiber of system itself institute band or the optical fiber in addition arranged are as conducting system incoming fiber optic sensor；Conduct optical fiber connection light letter
Number processing unit (polarization light unit, luminous intensity measurement unit, photoelectric converter etc.), treated that data are logical for optical signal processing unit
It crosses hub and is uploaded to host computer；It is indirect in by each terminal fitting due to the dispersed distribution characteristic of cable run stress cone
The data of head pickup area acquisition are sent into host computer after hub concentration；Algorithm is set in host computer and calculates the letter received
Number, assess the shelf depreciation state of monitored cable system.
The cable run partial discharge monitoring method that the utility model embodiment provides has the characteristics that：1. in cable
The method for proposing to be detected the shelf depreciation of cable insulation system using magneto-optic formula method in road.2. according to magneto-optic effect original
Reason proposes the position (light to be arranged around the screw type of conductor herein for the fibre optical sensor applied in cable run
It is fine).3. the sensitivity of fibre optical sensor is related to arrangement the number of turns of Helical Fiber.The method for changing sensor spiral the number of turns does not change
Become the final effect of the utility model embodiment.4. this method can make in laboratory environment and live high-noise environment simultaneously
With.5. this method is suitable for and online and offline environment.6. the position and shape of fibre optical sensor, the cloth of fibre optical sensor
It is the high risk zone comprising shelf depreciation, the high-risk area that cable external shield incision position (ground potential) is cable accessory to set principle.This
In embodiment, fibre optical sensor is arranged on the reinforced insulation of covering attachment stress cone, allows for the arrangement of fibre optical sensor
Stress cone production, attachment installation are not influenced, and it is convenient that fibre optical sensor arrangement and wiring are drawn.Its concrete shape and attachment it is specific
Shape is related.Therefore, as long as fibre optical sensor, which is arranged in the method on the outside of reinforced insulation, is regarded as the utility model reality
Apply being further change in and improving for example.
A kind of terminal is additionally provided in the utility model embodiment, as shown in fig. 6, including：At least one processor 601,
Such as CPU (Central Processing Unit, central processing unit), at least one communication interface 603, memory 604, until
A few communication bus 602.Wherein, communication bus 602 is for realizing the connection communication between these components.Wherein, communication connects
Mouth 603 may include display screen (Display), keyboard (Keyboard), and optional communication interface 603 can also include having for standard
Line interface, wireless interface.Memory 604 can be high-speed RAM memory (Ramdom Access Memory, effumability with
Machine accesses memory), can also be non-labile memory (non-volatile memory), for example, at least a disk
Memory.Memory 604 optionally can also be at least one storage device for being located remotely from aforementioned processor 601.Wherein locate
Cable run partial discharge monitoring device described in Fig. 1 and Fig. 2 can be combined by managing device 601, and one group of journey is stored in memory 604
Sequence code, and processor 601 calls the program code stored in memory 604, is locally put for a kind of cable run of execution
Pyroelectric monitor method is used to execute the cable run partial discharge monitoring method as in Fig. 3-Fig. 5 embodiments.
Wherein, communication bus 602 can be Peripheral Component Interconnect standard (peripheral component
Interconnect, abbreviation PCI) bus or expanding the industrial standard structure (extended industry standard
Architecture, abbreviation EISA) bus etc..Communication bus 602 can be divided into address bus, data/address bus, controlling bus etc..
For ease of indicating, only indicated with a thick line in Fig. 6, it is not intended that an only bus or a type of bus.
Wherein, memory 604 may include volatile memory (English：Volatile memory), such as arbitrary access
Memory (English：Random-access memory, abbreviation：RAM)；Memory can also include nonvolatile memory (English
Text：Non-volatile memory), such as flash memory (English：Flash memory), hard disk (English：hard disk
Drive, abbreviation：HDD) or solid state disk is (English：Solid-state drive, abbreviation：SSD)；Memory 604 can also wrap
Include the combination of the memory of mentioned kind.
Wherein, processor 601 can be central processing unit (English：Central processing unit, abbreviation：
CPU), network processing unit (English：Network processor, abbreviation：) or the combination of CPU and NP NP.
Wherein, processor 601 can further include hardware chip.Above-mentioned hardware chip can be application-specific integrated circuit
(English：Application-specific integrated circuit, abbreviation：ASIC), programmable logic device (English：
Programmable logic device, abbreviation：PLD) or combinations thereof.Above-mentioned PLD can be Complex Programmable Logic Devices
(English：Complex programmable logic device, abbreviation：CPLD), field programmable gate array (English：
Field-programmable gate array, abbreviation：FPGA), Universal Array Logic (English：generic array
Logic, abbreviation：GAL) or it is arbitrarily combined.
Optionally, memory 604 is additionally operable to storage program instruction.Processor 601 can be instructed with caller, be realized such as this
Apply for cable run partial discharge monitoring method shown in Fig. 3-Fig. 5 embodiments.
A kind of computer readable storage medium is also provided in the utility model embodiment, is deposited on computer readable storage medium
Computer executable instructions are contained, which can perform the cable road bureau in above-mentioned any means embodiment
Portion's electric discharge monitoring method.Wherein, the storage medium can be magnetic disc, CD, read-only memory (Read-Only
Memory, ROM), random access memory (Random Access Memory, RAM), flash memory (Flash
Memory), hard disk (Hard Disk Drive, abbreviation：) or solid state disk (Solid-State Drive, SSD) etc. HDD；Institute
State the combination that storage medium can also include the memory of mentioned kind.
It should be understood by those skilled in the art that, the embodiments of the present invention can be provided as method, system or computer
Program product.Therefore, the utility model can be used complete hardware embodiment, complete software embodiment or combine software and hardware
The form of the embodiment of aspect.Moreover, it wherein includes computer available programs that the utility model, which can be used in one or more,
Implement in the computer-usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) of code
The form of computer program product.
The utility model is produced with reference to according to the method, equipment (system) and computer program of the utility model embodiment
The flowchart and/or the block diagrams of product describes.It should be understood that can be realized by computer program instructions in flowchart and/or the block diagram
Each flow and/or block and flowchart and/or the block diagram in flow and/or box combination.These meters can be provided
Calculation machine program instruction is to the place of all-purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices
Device is managed to generate a machine so that the instruction executed by computer or the processor of other programmable data processing devices is produced
Life is for realizing the function of being specified in one flow of flow chart or multiple flows and/or one box of block diagram or multiple boxes
Device.
These computer program instructions, which may also be stored in, can guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works so that instruction generation stored in the computer readable memory includes referring to
Enable the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one box of block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device so that count
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, in computer or
The instruction executed on other programmable devices is provided for realizing in one flow of flow chart or multiple flows and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Obviously, the above embodiments are merely examples for clarifying the description, and does not limit the embodiments.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or
It changes.There is no necessity and possibility to exhaust all the enbodiments.And it is extended from this it is obvious variation or
Among the protection domain that variation is created still in the utility model.
Claims (8)
1. a kind of cable run partial discharge monitoring device, which is characterized in that including：Detection module and host computer, wherein
The detection module be set on cable run and/or ground wire return wire on, for being detected to local discharge signal,
The detection module includes polarization light unit, Fibre Optical Sensor unit and luminous intensity measurement unit；
The polarization light unit is used to form polarised light group, and the polarised light group includes at least two polarised lights, by the polarization
The light intensity value of the polarised light of light unit output end is as the first light intensity value；
The Fibre Optical Sensor unit is connect with the polarization light unit, the polarised light being used for transmission in the polarised light group；
The luminous intensity measurement unit is connect with the Fibre Optical Sensor unit, for described in after the Fibre Optical Sensor unit
The polarised light in polarised light group carries out coherent superposition, by the light intensity of the polarised light of the luminous intensity measurement unit output end
Value is used as the second light intensity value；
The host computer is connect with the detection module, for being worth to according to first light intensity value and second light intensity
Partial Discharge Detection result.
2. cable run partial discharge monitoring device according to claim 1, which is characterized in that the detection module also wraps
It includes：
Phase modulation unit connect with the polarization light unit, and is connect with the Fibre Optical Sensor unit, is used for the polarization
Polarised light phase difference in light group is modulated to preset value.
3. cable run partial discharge monitoring device according to claim 2, which is characterized in that when the polarised light group packet
When including two polarised lights, the preset value is 90 degree.
4. cable run partial discharge monitoring device according to claim 1, which is characterized in that the Fibre Optical Sensor unit
Spiral is set to the inside of the cable run stress cone；And/or spiral is set on the lateral wall of the ground wire return wire.
5. cable run partial discharge monitoring device according to claim 4, which is characterized in that the spirit of the detection module
The number of turns for the Fibre Optical Sensor unit that sensitivity is arranged according to spiral determines.
6. according to any cable run partial discharge monitoring devices of claim 1-5, which is characterized in that the polarised light
Unit is connect by optical fiber with the Fibre Optical Sensor unit；And/or the luminous intensity measurement unit is passed by optical fiber and the optical fiber
Feel unit connection.
7. according to any cable run partial discharge monitoring devices of claim 1-5, which is characterized in that further include：
Hub is connect with the detection module, and is connect with the host computer, for collecting the detection module output valve simultaneously
The output valve is sent to the host computer.
8. according to any cable run partial discharge monitoring devices of claim 1-5, which is characterized in that further include：
Photoelectric conversion module is connect with the detection module, and is connect with the host computer, for will first light intensity value with
Second light intensity value is respectively converted into the first value of electrical signals and the second value of electrical signals, and the host computer is additionally operable to according to described
One value of electrical signals and second value of electrical signals obtain Partial Discharge Detection result.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820230467.9U CN208026827U (en) | 2018-02-08 | 2018-02-08 | Cable run partial discharge monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820230467.9U CN208026827U (en) | 2018-02-08 | 2018-02-08 | Cable run partial discharge monitoring device |
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| Publication Number | Publication Date |
|---|---|
| CN208026827U true CN208026827U (en) | 2018-10-30 |
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ID=63904685
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820230467.9U Active CN208026827U (en) | 2018-02-08 | 2018-02-08 | Cable run partial discharge monitoring device |
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| Country | Link |
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| CN (1) | CN208026827U (en) |
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2018
- 2018-02-08 CN CN201820230467.9U patent/CN208026827U/en active Active
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