CN204166047U - A kind of lightning induced voltage sensor based on D-dot principle and measuring system - Google Patents
A kind of lightning induced voltage sensor based on D-dot principle and measuring system Download PDFInfo
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- CN204166047U CN204166047U CN201420550217.5U CN201420550217U CN204166047U CN 204166047 U CN204166047 U CN 204166047U CN 201420550217 U CN201420550217 U CN 201420550217U CN 204166047 U CN204166047 U CN 204166047U
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Abstract
The utility model discloses a kind of lightning induced voltage sensor based on D-dot principle and measuring system thereof, the insulation course comprising six layers of ring-shaped P CB plate and formed around six layers of ring-shaped P CB plate, every layer of pcb board is furnished with an electrode, electrode parallel connection wherein on odd-level forms electrode I, and the electrode parallel connection on even level forms electrode II; Through hole is provided with, for passing tested wire in the middle of described six layers of ring-shaped P CB plate.The utility model achieves non-cpntact measurement, reduces insulating requirements, and fast response time, frequency response range are wide, highly sensitive.
Description
Technical field
The utility model relates to electrical engineering field, is specifically related to a kind of lightning induced voltage sensor based on D-dot principle, is applied to the measurement of distribution line lightning induced voltage; Also relate to a kind of lightning induced voltage measuring system simultaneously.
Background technology
Transmission line of electricity is often set up in physical environment, the impact of the extraneous factor such as to be easily struck by lightning.China 35kV and following distribution network line do not install lightning conducter mostly, and add that self dielectric level is not high, easily lightning strike accident occurs, the failure rate wherein caused by lightning induced voltage has more been above 90%.Therefore, for this present situation, very important meaning is just provided with to the measurement of below 35kV overhead transmission line lightning induced voltage.
Now current, the measurement of lightning current parameter has remote measurement and directly measures two kinds of modes, remote measurement is because lightening detection antenna is away from thunder and lightning origination point, thunder and lightning electromagnetic wave is in communication process, affect by landform, buildings etc., there is decay in various degree and dispersion, therefore, the lightning current parameter accuracy obtained by remote measurement measurement is not high; Direct measurement is generally adopt the method for mounting magnetic steel rod on electric power line pole tower, and to be that cost is low be convenient to a large amount of installation to this method advantage, but shortcoming to be measuring result error large, can not record the thunderbolt time and obtain data inconvenient, labor capacity is very large.
Utility model content
In view of this, one of the purpose of this utility model is to provide a kind of lightning induced voltage sensor based on D-dot principle, and this sensor achieves non-cpntact measurement, reduces insulating requirements, and fast response time, frequency response range are wide, highly sensitive.Two of the purpose of this utility model is to provide a kind of lightning induced voltage measuring system based on D-dot principle.
One of the purpose of this utility model is realized by such technical scheme, based on the lightning induced voltage sensor of D-dot principle, the insulation course comprising six layers of ring-shaped P CB plate and formed around six layers of ring-shaped P CB plate, every layer of pcb board is furnished with an electrode, electrode parallel connection wherein on odd-level forms electrode I, and the electrode parallel connection on even level forms electrode II.
Further, in the middle of described six layers of ring-type pcb board, be provided with through hole, for passing tested wire.
Two of the purpose of this utility model is realized by such technical scheme, based on the lightning induced voltage measuring system of D-dot principle, comprise several measuring terminals, each measuring terminals comprises: for hit at thunder and lightning wire or near ground time produce the sensor of differential wave; Differential wave is carried out the amplifying circuit amplified; For carrying out the signal processing circuit of low frequency filtering to the signal after amplification; The simulating signal that signal processing circuit exports is converted to the high speed acquisition module of digital signal; With by digital data transmission to the GPRS wireless transport module of server.
Further, described amplifying circuit comprises resistance R6, resistance R8, resistance R10, resistance R5, resistance R11 and operational amplifier; Described resistance R6 is connected with the positive input of operational amplifier, described resistance R8 is connected with the reverse input end of operational amplifier, the common port of described operational amplifier and resistance R6 is by resistance R5 ground connection, the reverse input end of described operational amplifier and the common port of resistance R8 are by resistance R11 ground connection, the output terminal of described operational amplifier is connected with the input end of signal processing circuit, the output terminal of described operational amplifier is connected with the zeroing end of operational amplifier by resistance R10, the zeroing end ground connection of described operational amplifier.
Further, the insulation course comprising six layers of ring-shaped P CB plate and formed around six layers of ring-shaped P CB plate, every layer of pcb board is furnished with an electrode, and the electrode parallel connection wherein on odd-level forms electrode I, and the electrode parallel connection on even level forms electrode II.
Owing to have employed technique scheme, the utility model has following advantage:
(1) sensor achieves non-cpntact measurement, reduces insulating requirements, and fast response time, frequency response range are wide, highly sensitive.
(2) by wireless GPRS Digital Transmission, ensure that the real-time of signal, pass the waveform recorded and size back PC terminal monitory system in time, carry out analyzing and adding up.
(3) D-dot measuring system cost is low, and volume is little, easy for installation, and applicable large area is layouted monitoring.
Accompanying drawing explanation
In order to make the purpose of this utility model, technical scheme and advantage clearly, below in conjunction with accompanying drawing, the utility model is described in further detail, wherein:
Fig. 1 is the lightning induced voltage sensor construction figure based on D-dot principle;
Fig. 2 is the lightning induced voltage sensor section figure based on D-dot principle;
Fig. 3 is the lightning induced voltage measuring system block diagram based on D-dot principle;
Fig. 4 is amplifying circuit circuit diagram.
Embodiment
Below with reference to accompanying drawing, preferred embodiment of the present utility model is described in detail; Should be appreciated that preferred embodiment only in order to the utility model is described, instead of in order to limit protection domain of the present utility model.
Embodiment one
D-dot sensor is the measurement that the rate of change by measuring electric displacement vector realizes to lightning impulse voltage signal.When thunder and lightning to hit on tested wire or near wire during ground, the electrode of sensor can induce electric charge by field coupled, when the induced charge changed flows through the measuring resistance be connected with electrode, the resistance drop of generation and measured conductor current potential are directly proportional at the rate of change of the electric field that sensor measurement point produces.
Based on above-mentioned thought, the utility model provides a kind of lightning induced voltage sensor based on D-dot principle.As shown in Figure 1, wherein 1 is through hole r1=3 ~ 5cm that tested wire passes to sensor construction; Under being used to less volume to make the structure of multiple ring-type shunt electrodes, and making it reach higher measuring accuracy and good insulation degree, electrode machining being become the printed circuit board (PCB) (pcb board) of layers of copper as shown in Figure 2, r2=10 ~ 13cm; 3 is sensor insulation material layer r3=17 ~ 20cm.V
diffor the differential input voltage of sensor electrode I and electrode II, after connect that signal amplifies, treatment circuit.
Figure 2 shows that the sectional view of the pcb board of sensor, as calculated when pcb board is six layers, sensor just can work in from integrating state.Every one deck pcb board is provided with an electrode, and 4,5, No. 6 electrodes in figure are composed in parallel electrode I, and 7,8, No. 9 electrodes compose in parallel electrode II, and the electrode be connected in parallel has identical current potential.The voltage differential signal Δ U of electrode I and electrode II connects subsequent conditioning circuit.
The novel described D-dot sensor of this reality achieves non-cpntact measurement, and reduce insulating requirements, fast response time, frequency response range are wide, highly sensitive.
Embodiment two
As shown in Figure 3, the utility model also provides a kind of lightning induced voltage measuring system based on D-dot principle, comprise several measuring terminals, each measuring terminals comprise sensor, amplifying circuit, signal processing circuit, high speed acquisition module and by digital data transmission to the GPRS wireless transport module of server.
Described sensor be used for thunder and lightning hit wire or near ground time, record the differential wave between the electrode a pair with different potentials; Its structure adopts the sensor construction in embodiment one.
Due to the output signal of aforesaid sensor be there is for a pair different potentials electrode between differential wave Δ U, need to amplify, so that subsequent conditioning circuit is to the process of signal.Described amplifying circuit amplifies sensor output signal, makes it meet AD requirement.As shown in Figure 4, described amplifying circuit comprises resistance R6, resistance R8, resistance R10, resistance R5, resistance R11 and operational amplifier; Described resistance R6 is connected with the positive input of operational amplifier, described resistance R8 is connected with the reverse input end of operational amplifier, the common port of described operational amplifier and resistance R6 is by resistance R5 ground connection, the reverse input end of described operational amplifier and the common port of resistance R8 are by resistance R11 ground connection, the output terminal of described operational amplifier is connected with the input end of signal processing circuit, the output terminal of described operational amplifier is connected with the zeroing end of operational amplifier by resistance R10, the zeroing end ground connection of described operational amplifier.
In the output signal of sensor, there is the low-frequency interference signals such as some power frequencies, described signal processing circuit is used for carrying out high-pass filtering to sensor output signal, filtering low-frequency interference signal.
The task of described high number acquisition module gathers the simulating signal that exported by sensor and input GPRS wireless transport module after converting digital signal to carry out long-distance transmissions.
Wireless transport module adopts GPRS transmission data, realizes remote monitoring and communicates.GPRS wireless transmission supports IP agreement, and is most widely used agreement on the Internet.GPRS can provide the global wireless access of Internet and other packet network.Utilize Mobile Communication Service to set up virtual private data network network, the data of remote sites transformer station (or monitoring remote terminal) can be transferred to Surveillance center, thus realize the GPRS radio communication at monitoring remote terminal and power monitoring center.The stability of GPRS radio communication, security, real-time, opening are all fine, and its extended capability and economy have more advantage than conventional communication mode.
Server carries out analyzing and adding up, draw to CG lightning density, dodge the lightning parameters such as frequency.
Native system has the following advantages: 1, by wireless GPRS Digital Transmission, ensure that the real-time of signal, passes the waveform recorded and size back PC terminal monitory system in time, carries out analyzing and adding up; 2, measuring system cost is low, and volume is little, easy for installation, and applicable large area is layouted monitoring.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, obviously, those skilled in the art can carry out various change and modification to the utility model and not depart from spirit and scope of the present utility model.Like this, if these amendments of the present utility model and modification belong within the scope of the utility model claim and equivalent technologies thereof, then the utility model is also intended to comprise these change and modification.
Claims (5)
1. based on the lightning induced voltage sensor of D-dot principle, it is characterized in that: the insulation course comprising six layers of ring-shaped P CB plate and formed around six layers of ring-shaped P CB plate, every layer of pcb board is furnished with an electrode, electrode parallel connection wherein on odd-level forms electrode I, and the electrode parallel connection on even level forms electrode II.
2. the lightning induced voltage sensor based on D-dot principle according to claim 1, is characterized in that: be provided with through hole in the middle of described six layers of ring-shaped P CB plate, for passing tested wire.
3. based on the lightning induced voltage measuring system of D-dot principle, it is characterized in that: comprise several measuring terminals, each measuring terminals comprises:
For hit at thunder and lightning wire or near ground time export the sensor of differential wave;
Differential wave is carried out the amplifying circuit amplified;
For carrying out the signal processing circuit of low frequency filtering to the signal after amplification;
The simulating signal that signal processing circuit exports is converted to the high speed acquisition module of digital signal;
With by digital data transmission to the GPRS wireless transport module of server.
4. the lightning induced voltage measuring system based on D-dot principle according to claim 3, is characterized in that: described amplifying circuit comprises resistance R6, resistance R8, resistance R10, resistance R5, resistance R11 and operational amplifier; Described resistance R6 is connected with the positive input of operational amplifier, described resistance R8 is connected with the reverse input end of operational amplifier, the common port of described operational amplifier and resistance R6 is by resistance R5 ground connection, the reverse input end of described operational amplifier and the common port of resistance R8 are by resistance R11 ground connection, the output terminal of described operational amplifier is connected with the input end of signal processing circuit, the output terminal of described operational amplifier is connected with the zeroing end of operational amplifier by resistance R10, the zeroing end ground connection of described operational amplifier.
5. the lightning induced voltage measuring system based on D-dot principle according to claim 3, it is characterized in that: the insulation course comprising six layers of ring-shaped P CB plate and formed around six layers of ring-shaped P CB plate, every layer of pcb board is furnished with an electrode, electrode parallel connection wherein on odd-level forms electrode I, and the electrode parallel connection on even level forms electrode II.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201420550217.5U CN204166047U (en) | 2014-09-23 | 2014-09-23 | A kind of lightning induced voltage sensor based on D-dot principle and measuring system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420550217.5U CN204166047U (en) | 2014-09-23 | 2014-09-23 | A kind of lightning induced voltage sensor based on D-dot principle and measuring system |
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| CN201420550217.5U Expired - Fee Related CN204166047U (en) | 2014-09-23 | 2014-09-23 | A kind of lightning induced voltage sensor based on D-dot principle and measuring system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106291135A (en) * | 2016-07-01 | 2017-01-04 | 重庆大学 | The method for designing of the D dot electric-field sensor of transmission line of electricity |
| CN106324329A (en) * | 2016-10-25 | 2017-01-11 | 云南电网有限责任公司电力科学研究院 | Overvoltage self-adapting recognition method and system based on D-dot principle |
| CN116053014A (en) * | 2023-02-20 | 2023-05-02 | 河南澳美电气有限公司 | Voltage transformer |
-
2014
- 2014-09-23 CN CN201420550217.5U patent/CN204166047U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106291135A (en) * | 2016-07-01 | 2017-01-04 | 重庆大学 | The method for designing of the D dot electric-field sensor of transmission line of electricity |
| CN106324329A (en) * | 2016-10-25 | 2017-01-11 | 云南电网有限责任公司电力科学研究院 | Overvoltage self-adapting recognition method and system based on D-dot principle |
| CN106324329B (en) * | 2016-10-25 | 2023-09-22 | 云南电网有限责任公司电力科学研究院 | Overvoltage self-adaptive identification method and system based on D-dot principle |
| CN116053014A (en) * | 2023-02-20 | 2023-05-02 | 河南澳美电气有限公司 | Voltage transformer |
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Granted publication date: 20150218 |
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