CN113325265A - Device for detecting mixed traveling wave in power transmission line - Google Patents
Device for detecting mixed traveling wave in power transmission line Download PDFInfo
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- CN113325265A CN113325265A CN202110518714.1A CN202110518714A CN113325265A CN 113325265 A CN113325265 A CN 113325265A CN 202110518714 A CN202110518714 A CN 202110518714A CN 113325265 A CN113325265 A CN 113325265A
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- G—PHYSICS
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- 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
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/085—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution lines, e.g. overhead
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Abstract
The application relates to a detect device of mixed travelling wave among transmission line, the application relates to the technical field that the travelling wave detected, and the device includes: the traveling wave sensor is used for acquiring a mixed traveling wave signal; the signal separation circuit comprises an integrator, a low-pass filter, a subtracter, a wave trap, a high-pass filter, a first amplifier and a second amplifier, wherein the input end of the integrator is connected with the traveling wave sensor, the first input end of the subtracter is connected with the output end of the integrator, the second input end of the subtracter is connected with the output end of the integrator through the low-pass filter, the first output end of the subtracter is sequentially connected with the wave trap and the first amplifier, the second output end of the subtracter is sequentially connected with the high-pass filter and the second amplifier, meanwhile, the first amplifier is configured to output fault traveling wave signals, and the second amplifier is configured to output hidden danger traveling wave signals. The method and the device can filter the interference traveling wave signals, effectively monitor the fault traveling wave signals and the hidden danger traveling wave signals, and improve the accuracy and reliability of the abnormal early warning of the power transmission line.
Description
Technical Field
The application relates to the technical field of traveling wave detection, in particular to a device for detecting mixed traveling waves in a power transmission line.
Background
At present of rapid economic development, the number of power transmission lines is also rising year by year, the actual power transmission lines not only have the characteristic of long construction distance, but also can pass through sections with complex landforms and geomorphology, and when the power transmission lines are in operation, the power transmission lines not only can be subjected to sudden faults of lightning stroke, floating objects, windage yaw and the like, but also can have some preventable potential abnormalities, such as potential hidden dangers that insulators are cracked and hardware fittings are broken and fall off, or dirt, vegetation, ice coating and the like are attached to the power transmission lines.
If the power transmission line is required to run safely and stably, more comprehensive faults need to be monitored, in the related technology, various intelligent terminals are applied to the power transmission line to monitor abnormal states, for example, an intelligent monitoring terminal for collecting traveling wave signals is installed on the power transmission line, and the intelligent monitoring terminal uploads collected signal waveforms to a background to be analyzed and judged, so that the abnormal state alarm of the power transmission line is realized.
On a power transmission line, the amplitude range of a discharge signal generated when a fault or a fault hidden trouble actually occurs is 10 uA-10 kA, and the frequency range is 5kHz-50 MHz. The traditional Rogowski coil is insensitive when the discharge signal is a small signal, but the coil with the magnetic core is easy to generate waveform distortion when the discharge signal is a large signal, and the waveform distortion can cause that the traveling wave signal acquired by the intelligent monitoring terminal cannot truly reflect the waveform at the moment of a fault, thereby influencing the fault judgment of the power transmission line.
Therefore, it is a core idea of the inventor to develop a technology capable of effectively distinguishing fault traveling wave signals and hidden danger traveling wave signals.
Disclosure of Invention
The embodiment of the application provides a device for detecting mixed traveling waves in a power transmission line, and aims to solve the problem that faults and hidden trouble faults on the power transmission line cannot be simultaneously considered in the related technology.
In a first aspect, a device for detecting a mixed traveling wave in a power transmission line is provided, which includes:
the traveling wave sensor is used for acquiring a mixed traveling wave signal;
a signal separation circuit including an integrator, a low pass filter, a subtractor, a trap, a high pass filter, a first amplifier and a second amplifier,
the input end of the integrator is connected with the traveling wave sensor,
the first input end of the subtracter is connected with the output end of the integrator, the second input end of the subtracter is connected with the output end of the integrator through the low-pass filter, the first output end of the subtracter is sequentially connected with the wave trap and the first amplifier, the second output end of the subtracter is sequentially connected with the high-pass filter and the second amplifier,
meanwhile, the first amplifier is configured to output a fault traveling wave signal, and the second amplifier is configured to output a hidden danger traveling wave signal.
In some embodiments, the subtractor is configured to:
subtracting the mixed traveling wave signal received by the second output end from the mixed traveling wave signal received by the first input end to obtain a new mixed traveling wave signal;
and sending the new mixed traveling wave signal to the wave trap and the high-pass filter.
In some embodiments, the traveling wave sensor includes a first magnetic core and a second magnetic core that are wound out, and the first magnetic core has a greater number of windings than the second magnetic core.
In some embodiments, the first magnetic core and the second magnetic core are concentrically arranged magnetic ring configurations, and the first magnetic core is an inner ring.
In some embodiments, the first magnetic core and the second magnetic core are both magnetic rings that are detachable from each other.
In some embodiments, the second magnetic core comprises an upper half ring made of a nanocrystalline material and a lower half ring made of a flame retardant engineering plastic.
In some embodiments, the first magnetic core is made of a nanocrystalline material and the second magnetic core is made of at least a flame retardant engineering plastic.
In some embodiments, the ratio of windings on the first and second cores is 5: 1.
in some embodiments, the first amplifier has an amplification factor of 6 to 8, and the second amplifier has an amplification factor of 55 to 57.
In some embodiments, the low pass filter has a frequency of 5kHz, the trap has a frequency of 50Hz, and the high pass filter has a frequency of 5 kHz.
The beneficial effect that technical scheme that this application provided brought includes: the interference traveling wave signals are filtered, the fault traveling wave signals and the hidden danger traveling wave signals are effectively monitored, and the early warning accuracy and reliability of the abnormity of the power transmission line are improved.
The embodiment of the application provides a device for detecting mixed traveling waves in a power transmission line, after low-pass filtering processing is carried out on collected mixed traveling wave signals, the collected mixed traveling wave signals and the mixed traveling wave signals after low-pass filtering are processed through a subtracter, interference traveling wave signals in the environment can be filtered under the condition that the frequency spectrum characteristics of the mixed traveling wave signals are kept, in addition, no special requirement is required on the suppression ratio of a filter, the interference traveling wave signals can be filtered, fault traveling wave signals and hidden danger traveling wave signals are effectively monitored, and the accuracy and reliability of the abnormal early warning of the power transmission line are improved.
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In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a circuit configuration diagram of an apparatus for detecting a mixed traveling wave in a power transmission line according to an embodiment of the present application;
fig. 2 is a schematic diagram illustrating a distribution of a first magnetic core and a second magnetic core in a traveling wave sensor according to an embodiment of the present application;
FIG. 3 is a waveform diagram of the output of the first amplifier;
FIG. 4 is a waveform diagram of the second amplifier output;
in the figure: 1. a first magnetic core; 2. a second magnetic core; 21. an upper half ring; 22. and a lower half ring.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The embodiment of the application provides a device for detecting mixed traveling waves in a power transmission line, after the low-pass filtering processing is carried out on collected mixed traveling wave signals, the collected mixed traveling wave signals and the mixed traveling wave signals after the low-pass filtering processing are processed through a subtracter, interference traveling wave signals in the environment can be filtered under the condition that the frequency spectrum characteristics of the mixed traveling wave signals are kept, in addition, the rejection ratio of a filter is not particularly required, the interference traveling wave signals can be filtered, fault traveling wave signals and hidden danger traveling wave signals are effectively monitored, and the accuracy and reliability of the abnormal early warning of the power transmission line are improved.
As shown in fig. 1, an apparatus for detecting a mixed traveling wave in a power transmission line includes:
the traveling wave sensor is used for acquiring a mixed traveling wave signal;
a signal separation circuit including an integrator, a low pass filter, a subtractor, a trap, a high pass filter, a first amplifier and a second amplifier,
the input end of the integrator is connected with the traveling wave sensor,
the first input end of the subtracter is connected with the output end of the integrator, the second input end of the subtracter is connected with the output end of the integrator through the low-pass filter, the first output end of the subtracter is sequentially connected with the wave trap and the first amplifier, the second output end of the subtracter is sequentially connected with the high-pass filter and the second amplifier,
meanwhile, the first amplifier is configured to output a fault traveling wave signal, and the second amplifier is configured to output a hidden danger traveling wave signal.
The working principle of the device for detecting the mixed traveling wave in the power transmission line provided by the embodiment of the application is as follows:
the device is pre-installed on a power transmission line, a traveling wave sensor collects mixed traveling wave signals on the power transmission line, an integrator carries out integral reduction on the collected mixed traveling wave signals, the signals are divided into two paths of signals to be output after integral reduction, one path of signals are output to a first input end of a subtracter, the other path of signals are filtered through a low-pass filter and then output to a second input end of the subtracter, the two paths of signals are subjected to low-pass subtraction operation in the subtracter and then output to a wave trap and a high-pass filter respectively through a first output end of the subtracter and a second output end of the subtracter, one path of signals are subjected to wave trap to filter power frequency signals with the same frequency as the wave trap and then are amplified by a first amplifier by proper times to separate and output fault traveling wave signals, namely lightning stroke signals, and the other path of signals are subjected to high-frequency filter to filter power frequency signals and lightning stroke signals, as shown in fig. 3, the potential traveling wave signal is separated and output after being amplified by a proper multiple through the second amplifier, as shown in fig. 4.
As can be seen from fig. 3 and 4, in the same sampling period, the hidden danger traveling wave signal has a plurality of small waveforms, and the lightning traveling wave is a large waveform, which are significantly different from each other, and this is also because the generation of the hidden danger traveling wave signal may be a discharge-sustaining process, so that a plurality of waveforms are continuously generated, and then, a result of waveform superposition is displayed in a period of time.
Preferably, the subtractor is configured to:
subtracting the mixed traveling wave signal received by the second output end from the mixed traveling wave signal received by the first input end to obtain a new mixed traveling wave signal;
and sending the new mixed traveling wave signal to the wave trap and the high-pass filter.
In the embodiment of the application, after the low-pass filtering processing is performed on the collected mixed traveling wave signal, the mixed traveling wave signal after the low-pass filtering is subtracted from the collected mixed traveling wave signal, so that the interference signal in the environment can be filtered out under the condition that the frequency spectrum characteristic of the mixed traveling wave signal is maintained.
As shown in fig. 2, as a preferable solution of the embodiment of the present application, the traveling wave sensor includes a first magnetic core 1 and a second magnetic core 2, which are wound and output, and the number of windings of the first magnetic core 1 is greater than that of the second magnetic core 2.
Further, the first magnetic core 1 and the second magnetic core 2 are concentrically arranged magnetic ring structures, and the first magnetic core 1 is an inner ring.
Still further, the first magnetic core 1 and the second magnetic core 2 are both magnetic rings which are detachable.
Further, second magnetic core 2 includes upper half ring 21 made of a nanocrystalline material and lower half ring 22 made of a flame retardant engineering plastic.
In this embodiment, first magnetic core 1 is used for gathering the hidden danger travelling wave signal of small-amplitude, second magnetic core 2 is used for gathering the trouble travelling wave signal of big amplitude, and the material of the magnetic core skeleton of first magnetic core 1 and second magnetic core 2 is different, and nanocrystalline permeability is higher, and fire-retardant engineering plastics permeability is lower, and first magnetic core 1 is made by the nanocrystalline material to adopt the structure of inside and outside double-deck range with second magnetic core 2, utilize the physical characteristics of two magnetic cores that mixed material made, realize being applicable to and measure broad width discharge signal on the power transmission line.
And, first magnetic core 1 and second magnetic core 2 are all established on the power transmission line, set up to self structure removable so, make things convenient for the installation of first magnetic core 1 and second magnetic core 2.
As another preferable solution of the embodiment of the present application, the first magnetic core 1 is made of a nanocrystalline material, and the second magnetic core 2 is made of at least a flame retardant engineering plastic. If the magnetic permeability of the second magnetic core 2 is too low to normally detect a large signal of a wide frequency, the second magnetic core may be made of flame-retardant engineering plastics and nanocrystalline materials.
Preferably, the winding ratio of the first magnetic core 1 to the second magnetic core 2 is 5: 1. in this embodiment, the number of turns of the winding coil on the first core 1 of the inner ring is 625, and the number of turns of the winding coil on the second core 2 of the outer ring is 125 pounds.
Preferably, the amplification factor of the first amplifier is 6-8, and the amplification factor of the second amplifier is 55-57. In this embodiment, when the amplification factor of the first amplifier is 7 and the amplification factor of the second amplifier is 56, the separation effect is more obvious, and the characteristics of the lightning stroke signal and the hidden danger traveling wave signal are more prominent.
Specifically, the frequency of the low-pass filter is 5kHz, the frequency of the wave trap is 50Hz, and the frequency of the high-pass filter is 5 kHz. In practical application, when the frequency of the low-pass filter is 5kHz, the frequency of the wave trap is 50Hz, and the frequency of the high-pass filter is 5kHz, the separation effect is more obvious, as shown in fig. 3 and 4, in the same sampling period, the hidden danger traveling wave signal has a plurality of small waveforms, and the lightning traveling wave is a large waveform, and the difference between the two waveforms is significant, and because the generation of the hidden danger traveling wave signal may be a continuous discharge process, a plurality of waveforms can be continuously generated, and then, a waveform superposition result can be displayed in a period of time, so that not only can two signals be effectively distinguished, but also the waveform can be reliably monitored for more accurate subsequent analysis and processing.
In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A device for detecting mixed traveling waves in a power transmission line is characterized by comprising:
the traveling wave sensor is used for acquiring a mixed traveling wave signal;
a signal separation circuit including an integrator, a low pass filter, a subtractor, a trap, a high pass filter, a first amplifier and a second amplifier,
the input end of the integrator is connected with the traveling wave sensor,
the first input end of the subtracter is connected with the output end of the integrator, the second input end of the subtracter is connected with the output end of the integrator through the low-pass filter, the first output end of the subtracter is sequentially connected with the wave trap and the first amplifier, the second output end of the subtracter is sequentially connected with the high-pass filter and the second amplifier,
meanwhile, the first amplifier is configured to output a fault traveling wave signal, and the second amplifier is configured to output a hidden danger traveling wave signal.
2. The apparatus of detecting a mixed traveling wave in a power transmission line according to claim 1, wherein the subtractor is configured to:
subtracting the mixed traveling wave signal received by the second output end from the mixed traveling wave signal received by the first input end to obtain a new mixed traveling wave signal;
and sending the new mixed traveling wave signal to the wave trap and the high-pass filter.
3. The arrangement for detecting a mixed traveling wave in a power transmission line according to claim 1, characterized in that the traveling wave sensor comprises a first magnetic core (1) and a second magnetic core (2) which are wound and output, and the number of windings of the first magnetic core (1) is larger than that of the second magnetic core (2).
4. A device for detecting a mixed traveling wave in a power transmission line according to claim 3, characterized in that the first magnetic core (1) and the second magnetic core (2) are of a concentrically arranged magnetic loop configuration and the first magnetic core (1) is an inner loop.
5. Device for detecting a mixed travelling wave in a power transmission line according to claim 4, characterized in that said first magnetic core (1) and said second magnetic core (2) are both magnetic rings which are detachable from each other.
6. Device for detecting a mixed traveling wave in an electric transmission line according to claim 5, characterized in that said second magnetic core (2) comprises an upper half-ring (21) made of nanocrystalline material and a lower half-ring (22) made of flame-retardant engineering plastic.
7. The arrangement for detecting mixed traveling waves in an electric transmission line according to claim 4, characterized in that said first magnetic core (1) is made of nanocrystalline material and said second magnetic core (2) is made of at least flame retardant engineering plastic.
8. A device for detecting mixed traveling waves in a transmission line according to claim 3, characterized in that the winding ratio on the first (1) and second (2) cores is 5: 1.
9. the device for detecting the mixed traveling wave in the power transmission line according to claim 1, wherein the amplification factor of the first amplifier is 6-8, and the amplification factor of the second amplifier is 55-57.
10. The apparatus of claim 1, wherein the low pass filter has a frequency of 5kHz, the trap has a frequency of 50Hz, and the high pass filter has a frequency of 5 kHz.
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Citations (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1609954A (en) * | 2003-10-17 | 2005-04-27 | 上海乐金广电电子有限公司 | Interference removing apparatus and method for focusing error signal and tracking error signal |
| CN1963538A (en) * | 2006-11-21 | 2007-05-16 | 李君� | Shunt circuit linearity insulating circuit apparatus |
| CN102185812A (en) * | 2011-05-13 | 2011-09-14 | 吉林大学 | DC (direct-current) offset filtering circuit |
| CN102401853A (en) * | 2011-11-28 | 2012-04-04 | 河北工业大学 | Double-shaft fluxgate current sensor |
| CN102420592A (en) * | 2011-11-28 | 2012-04-18 | 浙江网新技术有限公司 | Short-time pulse interference elimination device and implementation method based on high-iron sensor environment |
| CN102488520A (en) * | 2011-10-27 | 2012-06-13 | 中国人民解放军第四军医大学 | Radar life body information extracting and processing system for monitoring life information |
| CN102622734A (en) * | 2010-12-15 | 2012-08-01 | 特克特朗尼克公司 | System and methods to measure noise and to generate picture quality prediction from source having no reference |
| CN202586351U (en) * | 2012-06-14 | 2012-12-05 | 广西电网公司电力科学研究院 | Suppression device for power frequency interference signal of power transmission line |
| CN102890207A (en) * | 2012-06-20 | 2013-01-23 | 武汉三相电力科技有限公司 | Identification method for judging whether lightning conductor or tower of power transmission line is struck by lightning |
| CN203275468U (en) * | 2013-05-13 | 2013-11-06 | 海南电力技术研究院 | Novel Rogowski coil for measuring power transmission line fault traveling wave current |
| CN204558652U (en) * | 2014-08-22 | 2015-08-12 | 曹二林 | A kind of multichannel lightning wave harvester |
| CN204696771U (en) * | 2015-06-16 | 2015-10-07 | 华北电力大学（保定） | The electric supply installation of high pressure electric line on-line monitoring equipment and system |
| CN105105744A (en) * | 2015-09-15 | 2015-12-02 | 成都汉康信息产业有限公司 | Electrocardiosignal collector |
| CN105572456A (en) * | 2016-03-10 | 2016-05-11 | 河北工业大学 | AC/DC fluxgate current sensor |
| CN106033096A (en) * | 2015-03-16 | 2016-10-19 | 武汉三相电力科技有限公司 | On-line monitoring system and method for transformer station lightning invasion wave |
| CN107817377A (en) * | 2017-11-17 | 2018-03-20 | 国网江苏省电力有限公司检修分公司 | It is a kind of to be set effective the hidden danger traveling wave detector device for suppressing interference outside based on sensor |
| CN207765247U (en) * | 2017-12-14 | 2018-08-24 | 福建创四方电子有限公司 | A kind of Rogowski coil current transformer |
| CN207798899U (en) * | 2018-03-08 | 2018-08-31 | 云南电网有限责任公司电力科学研究院 | A kind of current sensor and monitoring system |
| CN111157777A (en) * | 2020-01-14 | 2020-05-15 | 清华大学 | Design method of double-magnetic-core differential leakage current measurement sensor |
| CN111398662A (en) * | 2020-05-11 | 2020-07-10 | 上海品研测控技术有限公司 | Current sensor for power transmission line |
| CN211123109U (en) * | 2019-10-18 | 2020-07-28 | 武汉三相电力科技有限公司 | Railway contact net line traveling wave acquisition circuit |
-
2021
- 2021-05-12 CN CN202110518714.1A patent/CN113325265A/en active Pending
Patent Citations (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1609954A (en) * | 2003-10-17 | 2005-04-27 | 上海乐金广电电子有限公司 | Interference removing apparatus and method for focusing error signal and tracking error signal |
| CN1963538A (en) * | 2006-11-21 | 2007-05-16 | 李君� | Shunt circuit linearity insulating circuit apparatus |
| CN102622734A (en) * | 2010-12-15 | 2012-08-01 | 特克特朗尼克公司 | System and methods to measure noise and to generate picture quality prediction from source having no reference |
| CN102185812A (en) * | 2011-05-13 | 2011-09-14 | 吉林大学 | DC (direct-current) offset filtering circuit |
| CN102488520A (en) * | 2011-10-27 | 2012-06-13 | 中国人民解放军第四军医大学 | Radar life body information extracting and processing system for monitoring life information |
| CN102401853A (en) * | 2011-11-28 | 2012-04-04 | 河北工业大学 | Double-shaft fluxgate current sensor |
| CN102420592A (en) * | 2011-11-28 | 2012-04-18 | 浙江网新技术有限公司 | Short-time pulse interference elimination device and implementation method based on high-iron sensor environment |
| CN202586351U (en) * | 2012-06-14 | 2012-12-05 | 广西电网公司电力科学研究院 | Suppression device for power frequency interference signal of power transmission line |
| CN102890207A (en) * | 2012-06-20 | 2013-01-23 | 武汉三相电力科技有限公司 | Identification method for judging whether lightning conductor or tower of power transmission line is struck by lightning |
| CN203275468U (en) * | 2013-05-13 | 2013-11-06 | 海南电力技术研究院 | Novel Rogowski coil for measuring power transmission line fault traveling wave current |
| CN204558652U (en) * | 2014-08-22 | 2015-08-12 | 曹二林 | A kind of multichannel lightning wave harvester |
| CN106033096A (en) * | 2015-03-16 | 2016-10-19 | 武汉三相电力科技有限公司 | On-line monitoring system and method for transformer station lightning invasion wave |
| CN204696771U (en) * | 2015-06-16 | 2015-10-07 | 华北电力大学（保定） | The electric supply installation of high pressure electric line on-line monitoring equipment and system |
| CN105105744A (en) * | 2015-09-15 | 2015-12-02 | 成都汉康信息产业有限公司 | Electrocardiosignal collector |
| CN105572456A (en) * | 2016-03-10 | 2016-05-11 | 河北工业大学 | AC/DC fluxgate current sensor |
| CN107817377A (en) * | 2017-11-17 | 2018-03-20 | 国网江苏省电力有限公司检修分公司 | It is a kind of to be set effective the hidden danger traveling wave detector device for suppressing interference outside based on sensor |
| CN207765247U (en) * | 2017-12-14 | 2018-08-24 | 福建创四方电子有限公司 | A kind of Rogowski coil current transformer |
| CN207798899U (en) * | 2018-03-08 | 2018-08-31 | 云南电网有限责任公司电力科学研究院 | A kind of current sensor and monitoring system |
| CN211123109U (en) * | 2019-10-18 | 2020-07-28 | 武汉三相电力科技有限公司 | Railway contact net line traveling wave acquisition circuit |
| CN111157777A (en) * | 2020-01-14 | 2020-05-15 | 清华大学 | Design method of double-magnetic-core differential leakage current measurement sensor |
| CN111398662A (en) * | 2020-05-11 | 2020-07-10 | 上海品研测控技术有限公司 | Current sensor for power transmission line |
Non-Patent Citations (2)
| Title |
|---|
| 刘建林, 哈尔滨工程大学出版社 * |
| 莫佳: "《输电线路行波电流采集工频干扰抑制电路研究》", 《红水河》 * |
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Application publication date: 20210831 |