CN108344910A - A kind of power system monitoring equipment, system and method - Google Patents
A kind of power system monitoring equipment, system and method Download PDFInfo
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- CN108344910A CN108344910A CN201810048154.6A CN201810048154A CN108344910A CN 108344910 A CN108344910 A CN 108344910A CN 201810048154 A CN201810048154 A CN 201810048154A CN 108344910 A CN108344910 A CN 108344910A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/003—Environmental or reliability tests
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/24—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using light-modulating devices
- G01R15/241—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using light-modulating devices using electro-optical modulators, e.g. electro-absorption
Abstract
This application provides a kind of power system monitoring equipment, system and methods, wherein the power system monitoring equipment includes：Piezoceramic transducer, sensor fibre group, circulator, laser, photoelectric converter and signal processor, piezoceramic transducer is provided with connecting pin, piezoceramic transducer is used to access electric system to be measured by connecting pin, and electric system to be measured includes several transformers；Sensor fibre group includes the first sensor fibre, the second sensor fibre and third sensor fibre；Circulator is connect with laser by the first sensor fibre, and circulator is connect with piezoceramic transducer by the second sensor fibre, and photoelectric converter is connect with circulator by third sensor fibre, and photoelectric sensor is connect with signal processor.The embodiment of the present application can be in the transformer in not being introduced into electromagnetic interference monitoring electric system.
Description
Technical field
This application involves field of power technical fields, in particular to a kind of power system monitoring equipment, system
And method.
Background technology
With the continuous expansion in development of modern industry and population collection region, not to the load operation ability of electric system
Disconnected to improve, especially in peak times of power consumption, electric system is in overload operation, while proposing higher to the safety of electric system
Requirement.Transformer is most important equipment in electric system, in recent years caused by the accidents such as transformer voltage mutation directly
It is quite huge with indirect loss, it is therefore desirable to the voltage of transformer to be monitored in real time, to find transformer in voltage
When mutation, the transformer that voltage jump occurs can be quickly determined.
Currently, the developed mutual inductor product being monitored to power system transformer includes：Electromagnetic potential mutual inductance
Device and capacitance profile formula voltage transformer.These measuring apparatus all have certain limitation：Electromagnetic potential transformer is in height
When pressure and super-pressure monitoring, mutual inductor volume is big, and operation and maintenance are complicated, and easy to produce ferromagnetic resonance；Capacitance profile formula voltage
Transformer transient response characteristic is poor, and protective relaying device may be caused to generate maloperation, while belonging to active operation mode,
It is readily incorporated electromagnetic interference.
To sum up, existing that Current Transformer Using Active Compensation is relied primarily on to the method that power system transformer is monitored, it is readily incorporated
Electromagnetic interference.
Invention content
In view of this, the application's is designed to provide a kind of power system monitoring equipment, system and method, with it is active mutually
Sensor is when monitoring transformer and generating voltage jump, the problems such as introducing electromagnetic interference.
In a first aspect, the embodiment of the present application provides a kind of power system monitoring equipment, including：Piezoceramic transducer,
Sensor fibre group, circulator, laser, photoelectric converter and signal processor, the piezoceramic transducer are provided with connection
End, the piezoceramic transducer are used to access electric system to be measured by the connecting pin, and the electric system to be measured includes
Several transformers；
The sensor fibre group includes the first sensor fibre, the second sensor fibre and third sensor fibre；
The circulator is connect with the laser by first sensor fibre, and the circulator is made pottery with the piezoelectricity
Porcelain sensor is connected by second sensor fibre, and the photoelectric converter passes through the third sense light with the circulator
Fibre connection, the photoelectric sensor are connect with the signal processor；
The laser generates laser pulse signal, and the laser pulse signal is by first sensor fibre and described
Circulator enters second sensor fibre；
When voltage jump occurs for transformer of the piezoceramic transducer in the electric system to be measured, described in modulation
Laser pulse signal in second sensor fibre obtains modulating light pulse signal, and the modulating light pulse signal passes through the annular
Device enters the photoelectric converter by the third sensor fibre；
The photoelectric converter for the modulating light pulse signal to be converted to electric signal, and the electric signal is sent out
Send signal processor；
The signal processor, for according to the amplitude of the electric signal and the original amplitude of the laser pulse signal
Judge whether have transformer that voltage jump occurs in the electric system to be measured, when determination has transformer that voltage jump occurs,
The time that voltage jump occurs according to the light velocity and transformer determines the position for the transformer that voltage jump occurs.
The possible embodiment of with reference to first aspect the first, the embodiment of the present application provide the first of first aspect
Possible embodiment, the circulator include input, output end and common end, and the circulator is connected by the input terminal
Connect first sensor fibre；The circulator connects second sensor fibre by the common end；The circulator is logical
It crosses the 3rd sensor and connects the photoelectric converter.
With reference to first aspect, the embodiment of the present application provides second of possible embodiment of first aspect, the company
It includes first electrode lead incoming end and second electrode lead incoming end to connect end, the first electrode lead incoming end and the pressure
The top electrode of electroceramics sensor connects；The lower electrode of the second electrode lead incoming end and the piezoceramic transducer connects
It connects；
The first electrode lead incoming end is used to access the winding head end of the transformer in the electric system to be measured；Institute
State winding ends of the second electrode lead incoming end for accessing the transformer in the electric system to be measured.
With reference to first aspect, the embodiment of the present application provides the third possible embodiment of first aspect, the electricity
Signal is simulation electric wire number, and the transformer voltage monitoring system further includes analog-digital converter；
The analog-digital converter, for the analog electrical signal to be converted to digital electric signal, and by the digital telecommunication
Number it is sent to the signal processor；
The signal processor is used for the original amplitude according to the pre-stored laser pulse signal and the number
The amplitude of word electric signal judges whether have transformer that voltage jump occurs in the electric system to be measured, when the digital electric signal
Amplitude be more than the pre-stored laser pulse signal original amplitude when, determine in the electric system to be measured there is transformation
Voltage jump occurs for device.
The possible embodiment of with reference to first aspect the first, the embodiment of the present application provide the 4th kind of first aspect
Possible embodiment, one end of second sensor fibre are connect with the public relations end of the circulator, and the other end passes through bonding
Agent is bonded in the piezoceramic transducer surface.
With reference to first aspect, the embodiment of the present application provides the 5th kind of possible embodiment of first aspect, further includes
Phonetic warning component, the phonetic warning component are connect with the signal processor；
The signal processor is additionally operable to after determining the transformer to mutate, controls the phonetic warning component pair
The location information of the transformer of the mutation is reported.
With reference to first aspect, the embodiment of the present application provides the 6th kind of possible embodiment of first aspect, further includes
Display, the display are connect with the signal processor；
The signal processor is additionally operable to after determining the transformer to mutate, controls the display to the hair
The location information of the transformer of raw mutation is shown.
Second aspect, the embodiment of the present application provide a kind of power system monitoring system, including first aspect is to first party
Any power system monitoring equipment in the 6th kind of possible embodiment in face.
The third aspect, the embodiment of the present application provide a kind of power system monitoring method, are suitable for first aspect to first
Any power system monitoring equipment in 6th kind of possible embodiment of aspect, including：
The laser generates laser pulse signal, and the laser pulse signal is by first sensor fibre and described
Circulator enters second sensor fibre；
When voltage jump occurs for transformer of the piezoceramic transducer in the electric system to be measured, described in modulation
Laser pulse signal in second sensor fibre obtains modulating light pulse signal, and the modulating light pulse signal passes through the annular
Device enters the photoelectric converter by the third sensor fibre；
The modulating light pulse signal is converted to electric signal by the photoelectric converter, and the electric signal is sent signal
Processor；
The signal processor judges according to the amplitude of the electric signal and the original amplitude of the laser pulse signal
Whether there is transformer that voltage jump occurs in the electric system to be measured, when determination has transformer that voltage jump occurs, according to
The position of the transformer of the time determination generation voltage jump of voltage jump occurs for the light velocity and transformer.
In conjunction with the third aspect, the embodiment of the present application provides the first possible embodiment of the third aspect, the electricity
Signal is simulation electric wire number, and power system monitoring equipment further includes analog-digital converter, and the method further includes；
The analog electrical signal is converted to digital electric signal by the analog-digital converter, and the digital electric signal is sent
To the signal processor；
Original amplitude and the number electricity of the signal processor according to the pre-stored laser pulse signal
The amplitude of signal judges whether have transformer that voltage jump occurs in the electric system to be measured, when the width of the digital electric signal
When value is more than the original amplitude of the pre-stored laser pulse signal, determine in the electric system to be measured there is transformer hair
Raw voltage jump.
Compared in the prior art, the embodiment of the present application by piezoceramic transducer, sensor fibre group, circulator, swash
Light device, photoelectric converter and signal processor monitor the transformer in electric system.Wherein laser generates laser pulse letter
Number, laser pulse signal enters the second sensor fibre by the first sensor fibre, circulator；Piezoceramic transducer is in electricity to be measured
When voltage jump occurs for the transformer in Force system, the laser pulse signal modulated in the second sensor fibre obtains modulating light pulse
Signal, modulating light pulse signal enter the photoelectric converter by circulator by the third sensor fibre；Photoelectric converter
Modulating light pulse signal is converted into electric signal, and electric signal is sent into signal processor；Signal processor, for according to telecommunications
Number amplitude and the original amplitude of the laser pulse signal judge whether to have in electric system to be measured transformer that voltage occurs
Mutation, when determining that the time that voltage jump occurs according to the light velocity and transformer determines and occurs when having transformer that voltage jump occurs
The position of the transformer of voltage jump.Piezoelectric ceramic transformer in the application is passive mutual inductor, in monitoring transformer process
In the problems such as will not introducing electromagnetic interference.
To enable the above objects, features, and advantages of the application to be clearer and more comprehensible, preferred embodiment cited below particularly, and coordinate
Appended attached drawing, is described in detail below.
Description of the drawings
It, below will be to needed in the embodiment attached in order to illustrate more clearly of the technical solution of the embodiment of the present application
Figure is briefly described, it should be understood that the following drawings illustrates only some embodiments of the application, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 shows the first power system monitoring equipment schematic diagram that the embodiment of the present application is provided；
Fig. 2 shows second of power system monitoring equipment schematic diagrams that the embodiment of the present application is provided；
Fig. 3 shows the third power system monitoring equipment schematic diagram that the embodiment of the present application is provided；
Fig. 4 shows the 4th kind of power system monitoring equipment schematic diagram that the embodiment of the present application is provided；
Fig. 5 shows the concrete structure schematic diagram for the power system monitoring equipment that the embodiment of the present application is provided；
Fig. 6 shows the power system monitoring method flow diagram that the embodiment of the present application is provided.
Icon：101- piezoceramic transducers；102- sensor fibre groups；103- circulators；104- lasers；105- photoelectricity
Converter；106- signal processors；The connecting pins 1011-；1011A- first electrode lead incoming ends；1011B- second electrode leads
Incoming end；The first sensor fibres of 1021-；The second sensor fibres of 1022-；1023- third sensor fibres；1031- input terminals；
1032- output ends；The common ends 1033-；107- analog-digital converters；108- phonetic warning components；109- displays.
Specific implementation mode
To keep the purpose, technical scheme and advantage of the embodiment of the present application clearer, below in conjunction with the embodiment of the present application
Middle attached drawing, technical solutions in the embodiments of the present application are clearly and completely described, it is clear that described embodiment is only
It is some embodiments of the present application, instead of all the embodiments.The application being usually described and illustrated herein in the accompanying drawings is real
Applying the component of example can be arranged and designed with a variety of different configurations.Therefore, below to the application's for providing in the accompanying drawings
The detailed description of embodiment is not intended to limit claimed scope of the present application, but is merely representative of the selected reality of the application
Apply example.Based on embodiments herein, institute that those skilled in the art are obtained without making creative work
There is other embodiment, shall fall in the protection scope of this application.
Embodiment 1
The embodiment of the present application 1 provides a kind of power system monitoring equipment, includes as shown in Figure 1：Piezoceramic transducer
101, sensor fibre group 102, circulator 103, laser 104, photoelectric converter 105 and signal processor 106, piezoelectric ceramics pass
Sensor 101 is provided with connecting pin 1011, and piezoceramic transducer 101 is used to access electric system to be measured by connecting pin 1011,
Electric system to be measured includes several transformers.
Wherein, connecting pin 1011 includes first electrode lead incoming end 1011A and second electrode lead incoming end 1011B,
The top electrode (not shown in figure 1) of first electrode lead incoming end 1011A and piezoceramic transducer connects；Second electrode lead
The lower electrode (not shown in figure 1) of incoming end 1011B and piezoceramic transducer connects.
First electrode lead incoming end 1011A is used to access the winding head end of the transformer in electric system to be measured；Second
Contact conductor incoming end 1011B is used to access the winding ends of the transformer in the electric system to be measured.
Sensor fibre group 102 includes the first sensor fibre 1021, the second sensor fibre 1022 and third sensor fibre 1023.
Circulator 103 is connect with laser 104 by the first sensor fibre 1021, and circulator 103 is sensed with piezoelectric ceramics
Device 101 is connected by the second sensor fibre 1022, and photoelectric converter 105 is connected with circulator 103 by third sensor fibre 1023
It connects, photoelectric sensor 105 is connect with signal processor 106.
Specifically, circulator 103 includes input terminal 1031, output end 1032 and common end 1033, and circulator 103 is by defeated
Enter 1031 the first sensor fibre 1021 of connection of end；Circulator 103 connects the second sensor fibre 1022 by common end 1033；Annular
Device 103 connects photoelectric converter 105 by 3rd sensor 1023.
Wherein, one end of the second sensor fibre 1022 is connect with the public relations end 1033 of circulator 1033, and the other end passes through viscous
Knot agent is bonded in 101 surface of piezoceramic transducer.
When it is implemented, binder selects epoxy resin, and pass through degradation, to eliminate residual stress, reduces to the
The influence of two sensor fibres, 1022 positioning accuracy；Piezoceramic transducer 101 suggests selecting rectangular parallelepiped structure, convenient for bonding second
Sensor fibre 1022, while strain perception area can be increased, improve location sensitivity.
When it is implemented, conductive adhesive under room temperature, which may be used, carries out contact conductor incoming end and piezoceramic transducer
The connection of face electrode, the method that welding can also be used.It should be noted that in welding, it need to be quickly once-forming, avoid electricity
Soldering iron high temperature causes the depolarization of ceramic sensor element 101, reduces inverse piezoelectric effect.
When transformer voltage is mutated, winding head end and terminal voltage respectively by first electrode lead incoming end 1011A and
Second electrode lead incoming end 1011B is transmitted to piezoceramic transducer 101, due to inverse piezoelectric effect, piezoceramic transducer
101 generate strain, and by stress transfer, and then to the second sensor fibre 1022 of 101 surface of piezoceramic transducer bonding
Interior laser pulse signal is modulated.
Laser 104 generates laser pulse signal, and laser pulse signal passes through the first sensor fibre 1021 and circulator 103
Into the second sensor fibre 1022.
When voltage jump occurs for transformer of the piezoceramic transducer 101 in electric system to be measured, the second sensing of modulation
Laser pulse signal in optical fiber 1022 obtains modulating light pulse signal, and modulating light pulse signal is by circulator 103 by third
Sensor fibre 1023 enters photoelectric converter 105.
Piezoceramic transducer 101, since inverse piezoelectric effect generates strain, passes through stress in the voltage jump of transformer
The amplitude for the laser pulse signal in the second sensor fibre 1022 for transmitting, and then being bonded to piezoceramic transducer surface carries out
Intensity modulated so that the amplitude of laser pulse signal changes, and transformer is after mutation terminates i.e. voltage stabilization, no longer to swashing
The amplitude of light pulse signal is modulated, i.e., the amplitude of modulating light pulse signal is equal to the original amplitude of laser pulse signal.
Electric signal for modulating light pulse signal to be converted to electric signal, and is sent signal processing by photoelectric converter 105
Device.
Photoelectric converter 105 need to carry out overvoltage protection in design, and the voltage pulse that powered on moment generates is avoided to burn out
Device.
Signal processor 106, it is to be measured for being judged according to the amplitude of electric signal and the original amplitude of laser pulse signal
Whether there is transformer that voltage jump occurs in electric system, when determination has transformer that voltage jump occurs, according to the light velocity and change
The position of the transformer of the time determination generation voltage jump of voltage jump occurs for depressor.
Because the electric signal in the embodiment of the present application is simulation electric wire number, as shown in Fig. 2, then transformer voltage monitoring system
System further includes analog-digital converter 107.
Digital electric signal for analog electrical signal to be converted to digital electric signal, and is sent to letter by analog-digital converter 107
Number processor 106.
Signal processor 106, for the original amplitude and digital electric signal according to pre-stored laser pulse signal
Amplitude judge whether to have in electric system to be measured transformer that voltage jump occurs, deposited in advance when the amplitude of digital electric signal is more than
When the original amplitude of the laser pulse signal of storage, determining has transformer that voltage jump occurs in electric system to be measured.
Below to determining that the specific method of the position for the transformer that voltage jump occurs is illustrated：
Signal processor is when there is transformer that voltage jump occurs in determining electric system to be measured, i.e. the width of digital electric signal
Value starts timing when being more than the original amplitude of pre-stored laser pulse signal for the first time, when digital electric signal amplitude again etc.
When the original amplitude of pre-stored laser pulse signal, stop timing, by the time of the laser light velocity and record, determine away from
From this moment because laser pulse signal has passed through the second sensor fibre twice, the distance primarily determined is that voltage occurs to dash forward
Twice at a distance from signal processor of the transformer of change, thus again divided by 2 determined that occur the transformer of voltage jump with
The distance of signal processor exports the distance, finds the transformer that voltage jump occurs in time convenient for staff.
A kind of preferable embodiment, in the technical solution that the embodiment of the present application 1 proposes, as shown in figure 3, electric system
Monitoring device further includes phonetic warning component 108, and phonetic warning component 108 is connect with signal processor 106.
Signal processor 106 is additionally operable to after determining the transformer to mutate, and control voice early warning component 108 is to hair
The location information of the transformer of raw mutation is reported.
A kind of preferable embodiment, in the technical solution that the embodiment of the present application 1 proposes, as shown in figure 4, further including showing
Show that device 109, display 109 are connect with signal processor 106.
Signal processor 106 is additionally operable to after determining the transformer to mutate, and control display 109 is to mutating
The location information of transformer shown.
Fig. 5 is another structural schematic diagram for the power system monitoring equipment that the embodiment of the present application proposes, as shown in figure 5,
Second sensor fibre, 1022 terminal is provided with reflection liquid or faraday rotation mirror, when laser pulse signal is by laser 104
It sends out, enters the second sensor fibre 1022 by the first sensor fibre 1021 and circulator 103, by the second sensor fibre 1022
End reflection, using piezoceramic transducer 101 modulate after, become modulating light pulse signal, then enter by circulator
Photoelectric sensor 105.
Embodiment 2
The embodiment of the present application 2 provides a kind of power system monitoring system, including the power system monitoring that embodiment 1 proposes
Equipment.
Embodiment 3
The embodiment of the present application 3 provides a kind of power system monitoring method, is suitable for the electric system prison that embodiment 1 proposes
Measurement equipment includes the following steps S300~S330：
S300：Laser generates laser pulse signal, and laser pulse signal enters by the first sensor fibre and circulator
Second sensor fibre.
S310：When voltage jump occurs for transformer of the piezoceramic transducer in electric system to be measured, modulation second passes
Laser pulse signal in photosensitive fibre obtains modulating light pulse signal, and modulating light pulse signal is by circulator by third sense light
Fibre enters photoelectric converter.
S320：Modulating light pulse signal is converted to electric signal by photoelectric converter, and electric signal is sent signal processor.
S330：Signal processor judges electric power to be measured according to the amplitude of electric signal and the original amplitude of laser pulse signal
Whether there is transformer that voltage jump occurs in system, when determination has transformer that voltage jump occurs, according to the light velocity and transformer
The time that voltage jump occurs determines the position for the transformer that voltage jump occurs.
Preferably, electric signal is simulation electric wire number, power system monitoring equipment further includes analog-digital converter, electric system prison
Survey method further includes：
The analog electrical signal is converted to digital electric signal by analog-digital converter, and digital electric signal is sent at signal
Manage device.
Signal processor is according to the original amplitude of the pre-stored laser pulse signal and the width of digital electric signal
Value judges whether have transformer that voltage jump occurs in electric system to be measured, when the amplitude of digital electric signal is more than pre-stored
When the original amplitude of the laser pulse signal, determining has transformer that voltage jump occurs in electric system to be measured.
Compared in the prior art, the embodiment of the present application by piezoceramic transducer, sensor fibre group, circulator, swash
Light device, photoelectric converter and signal processor monitor the transformer in electric system.Wherein laser generates laser pulse letter
Number, laser pulse signal enters the second sensor fibre by the first sensor fibre, circulator；Piezoceramic transducer is in electricity to be measured
When voltage jump occurs for the transformer in Force system, the laser pulse signal modulated in the second sensor fibre obtains modulating light pulse
Signal, modulating light pulse signal enter the photoelectric converter by circulator by the third sensor fibre；Photoelectric converter
Modulating light pulse signal is converted into electric signal, and electric signal is sent into signal processor；Signal processor, for according to telecommunications
Number amplitude and the original amplitude of the laser pulse signal judge whether to have in electric system to be measured transformer that voltage occurs
Mutation, when determining that the time that voltage jump occurs according to the light velocity and transformer determines and occurs when having transformer that voltage jump occurs
The position of the transformer of voltage jump.Piezoelectric ceramic transformer in the application is passive mutual inductor, in monitoring transformer process
In the problems such as will not introducing electromagnetic interference.
The application has nothing with sensor fibre and the piezoceramic transducer medium that perceptually transformer voltage is mutated
The advantages that source, electromagnetism interference, substantially increases the stability of system；And the application is simple in structure, and application cost is low, scene
It is quick and easy for installation, can at any time quick-replaceable damage sensor component, have good environmental suitability and reliability, have
Conducive to practical application；And the application is determined using the position that Fibre Optical Sensor modulation-demo-demodulation method is mutated transformer voltage
Position, implementation is good, high sensitivity, and positioning accuracy is high, greatly prolongs the market life of product；And the present invention is big convenient for sensor
Scale is multiplexed, and in multiplexing, need to only bond piezoceramic transducer successively on optical fiber, and mounted on the transformer for needing to monitor
On, but the working performance of other sensors is had no effect on, while other optical devices and electricity device need not be increased, it drops significantly
Low system cost improves the survival ability of system and live adaptability.
It should be noted that：Similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined, then it further need not be defined and explained in subsequent attached drawing in a attached drawing.
In the description of the present application, it should be noted that term "center", "upper", "lower", "left", "right", "vertical",
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, or be somebody's turn to do
Invention product using when the orientation or positional relationship usually put, be merely for convenience of description the application and simplify to describe, without
It is instruction or implies that signified device or element must have a particular orientation, with specific azimuth configuration and operation, therefore not
It can be interpreted as the limitation to the application.In addition, term " first ", " second ", " third " etc. are only used for distinguishing description, and cannot manage
Solution is instruction or implies relative importance.
In the description of the present application, it is also necessary to which explanation is unless specifically defined or limited otherwise, term " setting ",
" installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be fixedly connected, may be a detachable connection or one
Connect to body；It can be mechanical connection, can also be electrical connection；It can be directly connected, it can also be indirect by intermediary
It is connected, can is the connection inside two elements.For the ordinary skill in the art, on being understood with concrete condition
State the concrete meaning of term in this application.
Finally it should be noted that：Embodiment described above, the only specific implementation mode of the application, to illustrate the application
Technical solution, rather than its limitations, the protection domain of the application is not limited thereto, although with reference to the foregoing embodiments to this Shen
It please be described in detail, it will be understood by those of ordinary skill in the art that：Any one skilled in the art
In the technical scope that the application discloses, it can still modify to the technical solution recorded in previous embodiment or can be light
It is readily conceivable that variation or equivalent replacement of some of the technical features；And these modifications, variation or replacement, do not make
The essence of corresponding technical solution is detached from the spirit and scope of the embodiment of the present application technical solution.The protection in the application should all be covered
Within the scope of.Therefore, the protection domain of the application shall be subject to the protection scope of the claim.
Claims (10)
1. a kind of power system monitoring equipment, which is characterized in that including：Piezoceramic transducer, sensor fibre group, circulator,
Laser, photoelectric converter and signal processor, the piezoceramic transducer are provided with connecting pin, the piezoelectric ceramics sensing
Device is used to access electric system to be measured by the connecting pin, and the electric system to be measured includes several transformers；
The sensor fibre group includes the first sensor fibre, the second sensor fibre and third sensor fibre；
The circulator is connect with the laser by first sensor fibre, and the circulator is passed with the piezoelectric ceramics
Sensor is connected by second sensor fibre, and the photoelectric converter is connected with the circulator by the third sensor fibre
It connects, the photoelectric sensor is connect with the signal processor；
The laser generates laser pulse signal, and the laser pulse signal passes through first sensor fibre and the annular
Device enters second sensor fibre；
When voltage jump occurs for transformer of the piezoceramic transducer in the electric system to be measured, modulation described second
Laser pulse signal in sensor fibre obtains modulating light pulse signal, the modulating light pulse signal by the circulator by
The third sensor fibre enters the photoelectric converter；
The photoelectric converter for the modulating light pulse signal to be converted to electric signal, and the electric signal is sent and is believed
Number processor；
The signal processor, for being judged according to the amplitude of the electric signal and the original amplitude of the laser pulse signal
Whether there is transformer that voltage jump occurs in the electric system to be measured, when determination has transformer that voltage jump occurs, according to
The position of the transformer of the time determination generation voltage jump of voltage jump occurs for the light velocity and transformer.
2. power system monitoring equipment according to claim 1, which is characterized in that the circulator includes input terminal, defeated
Outlet and common end, the circulator connect first sensor fibre by the input terminal；The circulator passes through described
Common end connects second sensor fibre；The circulator connects the photoelectric converter by the 3rd sensor.
3. power system monitoring equipment according to claim 1, which is characterized in that the connecting pin includes that first electrode is drawn
Line incoming end and second electrode lead incoming end, the first electrode lead incoming end are powered on the piezoceramic transducer
Pole connects；The second electrode lead incoming end is connect with the lower electrode of the piezoceramic transducer；
The first electrode lead incoming end is used to access the winding head end of the transformer in the electric system to be measured；Described
Two contact conductor incoming ends are used to access the winding ends of the transformer in the electric system to be measured.
4. power system monitoring equipment according to claim 1, which is characterized in that the electric signal is simulation electric wire number,
The transformer voltage monitoring system further includes analog-digital converter；
The analog-digital converter for the analog electrical signal to be converted to digital electric signal, and the digital electric signal is sent out
It send to the signal processor；
The signal processor, for electric according to the original amplitude of the pre-stored laser pulse signal and the number
The amplitude of signal judges whether have transformer that voltage jump occurs in the electric system to be measured, when the width of the digital electric signal
When value is more than the original amplitude of the pre-stored laser pulse signal, determine in the electric system to be measured there is transformer hair
Raw voltage jump.
5. power system monitoring equipment according to claim 2, which is characterized in that one end of second sensor fibre with
The public relations end of the circulator connects, and the other end is bonded in the piezoceramic transducer surface by binder.
6. power system monitoring equipment according to claim 1, which is characterized in that further include phonetic warning component, it is described
Phonetic warning component is connect with the signal processor；
The signal processor is additionally operable to after determining the transformer to mutate, controls the phonetic warning component to described
The location information of the transformer of mutation is reported.
7. power system monitoring equipment according to claim 1, which is characterized in that further include display, the display
It is connect with the signal processor；
The signal processor is additionally operable to after determining the transformer to mutate, is controlled the display and is occurred to dash forward to described
The location information of the transformer of change is shown.
8. a kind of power system monitoring system, which is characterized in that including any power system monitoring of claim 1 to 7
Equipment.
9. a kind of power system monitoring method is suitable for any power system monitoring equipment of claim 1 to 7, special
Sign is, including：
The laser generates laser pulse signal, and the laser pulse signal passes through first sensor fibre and the annular
Device enters second sensor fibre；
When voltage jump occurs for transformer of the piezoceramic transducer in the electric system to be measured, modulation described second
Laser pulse signal in sensor fibre obtains modulating light pulse signal, the modulating light pulse signal by the circulator by
The third sensor fibre enters the photoelectric converter；
The modulating light pulse signal is converted to electric signal by the photoelectric converter, and the electric signal is sent signal processing
Device；
The signal processor is according to described in the amplitude of the electric signal and the original amplitude judgement of the laser pulse signal
Whether there is transformer that voltage jump occurs in electric system to be measured, when determination has transformer that voltage jump occurs, according to the light velocity
The time that voltage jump occurs with transformer determines the position for the transformer that voltage jump occurs.
10. power system monitoring method according to claim 9, which is characterized in that the electric signal is simulation electric wire number,
Power system monitoring equipment further includes analog-digital converter, and the method further includes；
The analog electrical signal is converted to digital electric signal by the analog-digital converter, and the digital electric signal is sent to institute
State signal processor；
Original amplitude and the digital electric signal of the signal processor according to the pre-stored laser pulse signal
Amplitude judge whether to have in the electric system to be measured transformer that voltage jump occurs, when the amplitude of the digital electric signal is big
When the original amplitude of the pre-stored laser pulse signal, determining has transformer that electricity occurs in the electric system to be measured
Pressure mutation.
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| CN203811669U (en) * | 2014-04-29 | 2014-09-03 | 国家电网公司 | Fiber voltage measurement testing apparatus based on primary electrooptic effect |
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Application publication date: 20180731 |