CN111273077A - Passive wireless overvoltage on-line monitoring device - Google Patents
Passive wireless overvoltage on-line monitoring device Download PDFInfo
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- CN111273077A CN111273077A CN202010127237.1A CN202010127237A CN111273077A CN 111273077 A CN111273077 A CN 111273077A CN 202010127237 A CN202010127237 A CN 202010127237A CN 111273077 A CN111273077 A CN 111273077A
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- 238000012806 monitoring device Methods 0.000 title claims abstract description 19
- 239000004020 conductor Substances 0.000 claims abstract description 31
- 238000005259 measurement Methods 0.000 claims abstract description 15
- 230000005684 electric field Effects 0.000 claims abstract description 13
- 230000008054 signal transmission Effects 0.000 claims abstract description 13
- 238000005070 sampling Methods 0.000 claims description 7
- 238000009413 insulation Methods 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 4
- 230000001052 transient effect Effects 0.000 claims description 3
- 230000002265 prevention Effects 0.000 abstract description 6
- 238000012544 monitoring process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
- G01R19/16576—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 comparing DC or AC voltage with one threshold
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention relates to a passive wireless overvoltage on-line monitoring device, which comprises a measuring and signal receiving and sending module, a base and corona prevention module, a conductor, an energy providing and signal receiving module, a power line, a signal transmission line and a display module, wherein the measuring and signal receiving and sending module is connected with the base and corona prevention module; the base and the corona-proof module are fixed on the conductor; the measurement and signal receiving and sending module is fixed on the base and the corona-proof module; the energy supply and signal receiving module is wirelessly connected with the measurement and signal receiving and sending module through high-frequency electromagnetic waves; the power line is connected with the energy supply and signal receiving module and the display module; the signal transmission line is connected with the display module. The invention adopts wireless function and signal transmission, realizes high-frequency acquisition of overvoltage waveform, effectively inhibits the distortion of the electric field intensity on the surface of a conductor under the condition of overvoltage, and can accurately measure the overvoltage of a power system with the voltage level of 500kV or below.
Description
Technical Field
The invention belongs to the technical field of on-line monitoring of power systems, and particularly relates to a passive wireless overvoltage on-line monitoring device.
Background
In the process of changing the operation state of the power system, such as the operation of a circuit breaker or an isolation switch, lightning strike, resonance and the like, voltage fluctuation is easy to occur to form overvoltage. Although the overvoltage is short in duration and has low occurrence probability, once insulation breakdown is caused, equipment can be damaged, and power supply is interrupted. Therefore, the overvoltage of the power system is monitored, the working condition, waveform data and distribution condition of overvoltage are quantitatively researched, and the overvoltage monitoring device has important significance for overvoltage treatment, fault analysis, mechanism research and simulation verification of the power system.
The overvoltage monitoring is always a difficult problem of online monitoring of a power system, and is mainly shown in the following steps: overvoltage cannot be directly measured, the overvoltage duration is short, the frequency requirement of the sampling device is high, the electrified body shows that the electric quantity is easy to distort under the overvoltage condition, and the measuring device is provided with distributed capacitance to filter high-frequency signals of overvoltage of a steep wave head. Therefore, a new overvoltage measuring device is needed to solve the disadvantages of the existing overvoltage measuring devices.
Disclosure of Invention
The invention aims to provide a passive wireless overvoltage on-line monitoring device, which is used for on-line monitoring overvoltage of a power system, realizing front-end on-line measurement and signal sending module, energy supply and signal receiving and sending module, and a base and an anti-corona module which are separately designed, wherein the on-line measurement and energy sending module is passive and wireless, and the base and the anti-corona module can ensure that the electric field intensity of the position where the measurement and energy sending module is located does not distort under the overvoltage condition, so that the accurate measurement of the overvoltage of a conductor is realized.
The invention provides a passive wireless overvoltage on-line monitoring device, which comprises a measuring and signal receiving and sending module, a base and corona-proof module, a conductor, an energy providing and signal receiving module, a power line, a signal transmission line and a display module, wherein the measuring and signal receiving and sending module is connected with the base and corona-proof module;
the base and the corona prevention module are fixed on the conductor; the measuring and signal receiving and sending module is fixed on the base and the corona-proof module and is used for measuring the electric field intensity on the surfaces of the base and the corona-proof module;
the energy providing and signal receiving module is wirelessly connected with the measuring and signal receiving and sending module through high-frequency electromagnetic waves and is used for providing energy for the measuring and signal receiving and sending module and receiving data transmitted by the measuring and signal receiving and sending module;
the power line is connected with the energy supply and signal receiving module and the display module and is used for supplying power to the energy supply and signal receiving module and the display module; the signal transmission line is connected with the display module and used for transmitting the data in the energy supply and signal receiving module to the display module for storage and display.
Further, the measurement and signal receiving and transmitting module comprises:
the energy receiving unit is used for receiving fixed-frequency radio waves transmitted by the energy providing and signal receiving module and converting the radio waves into electric energy;
the signal measuring and calculating unit is used for collecting the electric field intensity and converting the electric field intensity into the surface potential of the conductor;
and the signal sending unit is used for sending the conductor surface potential signal to the energy supply and signal receiving module in a radio wave form.
Further, the sampling frequency of the signal measuring and calculating unit is not lower than 100MS/s so as to meet the sampling requirement of the rapid transient overvoltage steep wave head part.
Further, the outer diameters of the base and the corona protection module are determined according to the maximum overvoltage of the voltage class of the monitored system, so that the outer surfaces of the base and the corona protection module are prevented from generating corona under the condition of the maximum overvoltage.
Further, the base and the corona prevention module are made of soft conductive materials, and the conductor is a lead or a hard-pipe bus type conductor.
Further, the wireless transmission distance between the energy supply and signal receiving module and the wireless transmission distance between the measurement and signal receiving and sending module are not less than 10m, so that the requirement of the insulation distance between the insulation charged body and the low potential body in the voltage class of 500kV or below is met.
By means of the scheme, the passive wireless overvoltage online monitoring device realizes high-frequency acquisition of overvoltage waveforms by adopting a wireless function and signal transmission, effectively inhibits the distortion of the electric field intensity on the surface of a conductor under the overvoltage condition, and can accurately measure the overvoltage of a power system with the voltage level of 500kV or below.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
FIG. 1 is a connection diagram of a measurement and signal receiving and transmitting module, a base and corona prevention module and a conductor in the passive wireless overvoltage on-line monitoring device of the invention; wherein, the left side is vertical to the conductor direction, and the right side is along the conductor direction; 819
FIG. 2 is a connection diagram of a power line, a signal transmission line and a display module in the passive wireless overvoltage on-line monitoring device according to the present invention;
fig. 3 is a waveform diagram of overvoltage collected by the passive wireless overvoltage on-line monitoring device of the invention.
Reference numbers in the figures:
1-a measuring and signal receiving and transmitting module; 2-base and corona protection module; 3-a conductor; 4-energy supply and signal receiving module; 5-a power line; 6-a signal transmission line; 7-display module.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
Referring to fig. 1 and 2, the present embodiment provides a passive wireless overvoltage on-line monitoring device, which is characterized in that the device includes a measuring and signal receiving and transmitting module 1, a base and corona-proof module 2, a conductor 3, an energy providing and signal receiving module 4, a power line 5, a signal transmission line 6 and a display module 7;
the base and the anticorona module 2 are fixed on the conductor 3; the measuring and signal receiving and sending module 1 is fixed on the base and corona-proof module 2 and is used for measuring the electric field intensity on the surface of the base and corona-proof module 2;
the energy providing and signal receiving module 4 is wirelessly connected with the measuring and signal receiving and sending module 1 through high-frequency electromagnetic waves and is used for providing energy for the measuring and signal receiving and sending module 1 and receiving data transmitted by the measuring and signal receiving and sending module 1;
the power line 5 is connected with the energy supply and signal receiving module 4 and the display module 7 and is used for supplying power to the energy supply and signal receiving module 4 and the display module 7; the signal transmission line 6 is connected with the display module 7 and is used for transmitting the data in the energy supply and signal receiving module 4 to the display module 7 for storage and display. Referring to the overvoltage waveform shown in fig. 3, (a) is a typical lightning overvoltage measurement waveform, and (b) is a typical closing overvoltage measurement waveform.
The passive wireless overvoltage on-line monitoring device adopts a wireless function and signal transmission, realizes high-frequency acquisition of overvoltage waveforms, effectively inhibits the distortion of the electric field intensity on the surface of a conductor under the overvoltage condition, and can accurately measure the overvoltage of a power system with the voltage level of 500kV or below.
In this embodiment, the measurement and signal receiving and transmitting module 1 includes:
an energy receiving unit for receiving energy and providing fixed frequency radio waves emitted by the signal receiving module 4, and converting the radio waves into electric energy;
the signal measuring and calculating unit is used for collecting the electric field intensity and converting the electric field intensity into the surface potential of the conductor 3;
and the signal sending unit is used for sending the surface potential signal of the conductor 3 to the energy supply and signal receiving module 4 in a radio wave form.
In the embodiment, the sampling frequency of the signal measuring and calculating unit is not lower than 100MS/s to meet the sampling requirement of the fast transient overvoltage steep wave head part.
In this embodiment, the outer diameters of the base and corona protection module 2 are determined based on the voltage class maximum overvoltage of the system being monitored to ensure that no corona occurs on the outer surfaces of the base and corona protection module 2 under the maximum overvoltage condition.
In the present embodiment, the base and the corona prevention module 2 are made of soft conductive materials, and the conductor 3 is made of a wire or hard-pipe bus type conductor.
In the embodiment, the wireless transmission distance between the energy supply and signal receiving module 4 and the measurement and signal receiving and transmitting module 1 is not less than 10m, so as to satisfy the requirement of the insulation distance between the insulated charged body and the low-potential body in the voltage class of 500kV and below.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, it should be noted that, for those skilled in the art, many modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (6)
1. A passive wireless overvoltage on-line monitoring device is characterized by comprising a measuring and signal receiving and sending module (1), a base and corona-proof module (2), a conductor (3), an energy providing and signal receiving module (4), a power line (5), a signal transmission line (6) and a display module (7);
the base and the corona-proof module (2) are fixed on the conductor (3); the measurement and signal receiving and sending module (1) is fixed on the base and the corona-proof module (2) and is used for measuring the electric field intensity on the surfaces of the base and the corona-proof module (2);
the energy providing and signal receiving module (4) is wirelessly connected with the measuring and signal receiving and sending module (1) through high-frequency electromagnetic waves and is used for providing energy for the measuring and signal receiving and sending module (1) and receiving data transmitted by the measuring and signal receiving and sending module (1);
the power line (5) is connected with the energy supply and signal receiving module (4) and the display module (7) and is used for supplying power to the energy supply and signal receiving module (4) and the display module (7); the signal transmission line (6) is connected with the display module (7) and is used for transmitting the data in the energy supply and signal receiving module (4) to the display module (7) for storage and display.
2. The passive wireless overvoltage on-line monitoring device according to claim 1, wherein the measuring and signal receiving and transmitting module (1) comprises:
the energy receiving unit is used for receiving energy and providing fixed-frequency radio waves transmitted by the signal receiving module (4), and converting the radio waves into electric energy;
the signal measuring and calculating unit is used for collecting the electric field intensity and converting the electric field intensity into the surface potential of the conductor (3);
and the signal sending unit is used for sending the surface potential signal of the conductor (3) to the energy supply and signal receiving module (4) in a radio wave form.
3. The passive wireless overvoltage online monitoring device according to claim 2, wherein the sampling frequency of the signal measuring and calculating unit is not lower than 100MS/s to meet the sampling requirement of the fast transient overvoltage steep wave head part.
4. The passive wireless overvoltage on-line monitoring device according to claim 1, characterized in that the outer diameter of the base and corona protection module (2) is determined according to the voltage class maximum overvoltage of the monitored system to ensure that no corona occurs at the outer surface of the base and corona protection module (2) under maximum overvoltage condition.
5. The passive wireless overvoltage online monitoring device according to claim 1, wherein the base and the corona protection module (2) are made of soft conductive materials, and the conductor (3) is made of a wire or hard-pipe bus type conductor.
6. The passive wireless overvoltage online monitoring device according to claim 1, wherein the wireless transmission distance between the energy supply and signal receiving module (4) and the measurement and signal receiving and transmitting module (1) is not less than 10m, so as to meet the requirement of the insulation distance between the insulated charged body and the low potential body in the voltage class of 500kV and below.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010127237.1A CN111273077A (en) | 2020-02-28 | 2020-02-28 | Passive wireless overvoltage on-line monitoring device |
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| CN202010127237.1A CN111273077A (en) | 2020-02-28 | 2020-02-28 | Passive wireless overvoltage on-line monitoring device |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101303082B1 (en) * | 2012-03-15 | 2013-09-03 | 오피전력기술 주식회사 | Apparatus for detecting partial discharge of portable |
| CN103901261A (en) * | 2014-04-03 | 2014-07-02 | 国家电网公司 | System and method for conducting wireless measurement on overvoltage of electrical power system |
| CN203881834U (en) * | 2014-06-12 | 2014-10-15 | 国网上海市电力公司 | AC-DC current wireless monitoring equipment |
| CN104215819A (en) * | 2014-09-25 | 2014-12-17 | 国家电网公司 | Monitoring device for gas insulated switchgear (GIS) thunder-and-lightening invasion overvoltage |
| CN206601435U (en) * | 2017-03-22 | 2017-10-31 | 清华大学 | The portable over-pressed harvester of full optics and system |
| CN107328989A (en) * | 2017-08-23 | 2017-11-07 | 国网辽宁省电力有限公司电力科学研究院 | A kind of transformer station's over-voltage monitoring system and method based on wireless collection technology |
| CN109029751A (en) * | 2018-09-07 | 2018-12-18 | 北京希卓信息技术有限公司 | Wireless temperature detecting device applied to outdoor extra-high tension unit |
| CN110632468A (en) * | 2019-09-04 | 2019-12-31 | 国网辽宁省电力有限公司电力科学研究院 | Wireless cable partial discharge detection device, system and method based on high-frequency current sensor |
| CN212008737U (en) * | 2020-02-28 | 2020-11-24 | 大唐水电科学技术研究院有限公司 | Passive wireless overvoltage on-line monitoring device |
-
2020
- 2020-02-28 CN CN202010127237.1A patent/CN111273077A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101303082B1 (en) * | 2012-03-15 | 2013-09-03 | 오피전력기술 주식회사 | Apparatus for detecting partial discharge of portable |
| CN103901261A (en) * | 2014-04-03 | 2014-07-02 | 国家电网公司 | System and method for conducting wireless measurement on overvoltage of electrical power system |
| CN203881834U (en) * | 2014-06-12 | 2014-10-15 | 国网上海市电力公司 | AC-DC current wireless monitoring equipment |
| CN104215819A (en) * | 2014-09-25 | 2014-12-17 | 国家电网公司 | Monitoring device for gas insulated switchgear (GIS) thunder-and-lightening invasion overvoltage |
| CN206601435U (en) * | 2017-03-22 | 2017-10-31 | 清华大学 | The portable over-pressed harvester of full optics and system |
| CN107328989A (en) * | 2017-08-23 | 2017-11-07 | 国网辽宁省电力有限公司电力科学研究院 | A kind of transformer station's over-voltage monitoring system and method based on wireless collection technology |
| CN109029751A (en) * | 2018-09-07 | 2018-12-18 | 北京希卓信息技术有限公司 | Wireless temperature detecting device applied to outdoor extra-high tension unit |
| CN110632468A (en) * | 2019-09-04 | 2019-12-31 | 国网辽宁省电力有限公司电力科学研究院 | Wireless cable partial discharge detection device, system and method based on high-frequency current sensor |
| CN212008737U (en) * | 2020-02-28 | 2020-11-24 | 大唐水电科学技术研究院有限公司 | Passive wireless overvoltage on-line monitoring device |
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