CN112857287A - Non-electric quantity protection method and system for on-load tap-changer based on vibration intensity - Google Patents
Non-electric quantity protection method and system for on-load tap-changer based on vibration intensity Download PDFInfo
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- CN112857287A CN112857287A CN202110009247.XA CN202110009247A CN112857287A CN 112857287 A CN112857287 A CN 112857287A CN 202110009247 A CN202110009247 A CN 202110009247A CN 112857287 A CN112857287 A CN 112857287A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
- H01F27/402—Association of measuring or protective means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H17/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups
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- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Protection Of Transformers (AREA)
Abstract
The invention relates to a vibration intensity-based on-load tap-changer non-electric quantity protection method, which comprises the following steps: obtaining vertical vibration intensity v of on-load tap-changerrms1And horizontal vibration intensity vrms2(ii) a Judging the vertical vibration intensity vrms1And horizontal vibration intensity vrms2And according to the judgment result, carrying out non-electric quantity protection on the on-load tap-changer. The invention also discloses a vibration intensity-based on-load tap-changer non-electric quantity protection system. The invention can effectively start when the on-load tap-changer has internal fault, protects reliable action, and simultaneously ensures that the on-load tap-changer does not malfunction when being normally switched by a time delay strategy.
Description
Technical Field
The invention relates to the technical field of protection of oil-immersed transformers, in particular to a vibration intensity-based on-load tap-changer non-electric quantity protection method and system.
Background
The on-load tap-changer for the transformer is important equipment for stabilizing the load center voltage, connecting a power grid, adjusting load flow and improving reactive power distribution, and the reliable operation of the on-load tap-changer is directly related to the stability of a system. The on-load tap-changer has a separate oil chamber, the change-over switch completes the switching of the transformer tap in the oil chamber, realizes the transfer of current and reliably extinguishes the arc in insulating oil, but the on-load tap-changer is used as a mechanical part of the transformer which rapidly runs under high voltage and heavy current, and the frequent switching is needed to realize the voltage regulation when the load fluctuates, so that the faults of poor contact, improper action and the like are easy to occur. The phenomenon of continuous heating or continuous electric arc under the fault condition causes the vaporization and decomposition of the insulating oil, the insulating oil can be rushed to an oil conservator due to gas expansion and rising, and meanwhile, the quality of the insulating oil is reduced, so that the normal operation of the on-load tap-changer is directly influenced.
At present, the on-load tap-changer of the transformer is mainly provided with non-electric protection of a pressure release valve, an explosion-proof membrane and gas protection, wherein the pressure release valve and the explosion-proof membrane are pressure sensitive protection, along with the increase of the capacity of the transformer, when the transformer runs under heavy load, the switching current under the normal switching condition of the on-load tap-changer is larger, the fluctuation range of the pressure in an oil chamber is large, and the possibility of misoperation of the pressure release valve is caused.
The gas protection reflecting the oil flow surging is a non-electric quantity protection type mainly used by the existing on-load tap-changer, and long-term operation practice shows that the internal fault of the on-load tap-changer of the transformer can be better discriminated by utilizing the flow speed characteristic of insulating oil in an oil conservator connecting pipe. However, the gas relay used at present still continues the basic principle and mechanical structure of the Buchholz relay for centuries, and the protection fixed value is an empirical value summarized in long-term operation. In the long-term use process of the on-load tap changer, a large amount of oil sludge is separated out due to the fact that oxides fall off and insulating oil is degraded, once the oil sludge is attached to mechanical components such as a gas protection baffle, a floater or a spring, the accuracy and flexibility of the action of an electric appliance are seriously affected, a heavy gas detection mechanism consisting of the mechanical baffle and the spring can only measure a single index of oil flow velocity, the operation state is discriminated only according to the single index of the flow velocity, and the gas protection can be judged wrongly. The on-load tap-changer can generate obvious and continuous oil flow surging under the normal operation switching condition, the oil flow surging conditions under different load currents are different, particularly, when a large-capacity transformer runs under heavy load, the current is large under the normal operation switching condition of the on-load tap-changer, the caused oil flow rate is large, the gas protection experience value suitable for the on-load tap-changer of the transformer with smaller capacity is larger than that before, and protection misoperation is caused. The existing mechanical gas protection is increasingly difficult to meet the requirement of the on-load tap-changer for the high-capacity transformer on the protection reliability. According to the practical operation experience of engineering and related reports, cases of gas protection maloperation of on-load tap-changer for a plurality of high-capacity transformers have appeared.
Disclosure of Invention
The invention aims to provide a vibration intensity-based on-load tap-changer non-electric quantity protection method which can quickly judge whether an arc fault occurs in an on-load tap-changer and can also prevent misoperation in a normal switching state of the on-load tap-changer so as to quickly judge and quickly isolate the fault.
In order to achieve the purpose, the invention adopts the following technical scheme: a vibration intensity-based on-load tap-changer non-electric quantity protection method comprises the following steps:
(1) obtaining vertical vibration intensity v of on-load tap-changerrms1And horizontal vibration intensity vrms2；
(2) Judging the vertical vibration intensity vrms1And horizontal vibration intensity vrms2The size of (2):
and according to the judgment result, carrying out non-electric quantity protection on the on-load tap-changer.
In the step (2):
if vibration intensity v in vertical directionrms1Vibration quick-break protection instantaneous action setting value greater than vertical direction
Starting the vibration relay to protect the action and cut off the transformer;
if the vibration intensity v is in the horizontal directionrms2Vibration quick-break protection instantaneous action setting value larger than horizontal direction
Starting the vibration relay to protect the action and cut off the transformer;
if vibration intensity v in vertical directionrms1Greater than vertical timing margin protection constant vset1Then the first timer vibrates intensity v to the vertical directionrms1Timing limit protection timer for more than vertical directionValue vset1Timing if the duration time reaches the preset delay time tset1If the voltage is lower than the preset voltage, the vibration relay is started to protect the transformer and cut off the transformer;
if the vibration intensity v is in the horizontal directionrms2Greater than horizontal timing limit protection constant value vset2Then the second timer vibrates intensity v to the horizontal directionrms2Greater than horizontal timing limit protection constant value vset2Timing if the duration time reaches the preset delay time tset2And then the vibration relay is started to protect the transformer and cut off the transformer.
In the step (2), the vibration quick-break protection instantaneous action setting value in the vertical direction
Vibration quick-break protection instantaneous action setting value in horizontal direction
Respectively according to the maximum vibration intensity v in the vertical direction in the oil conservator connecting pipe under the condition of normal operation switching of the on-load tap-changer during the maximum load operation of the transformermax1Maximum vibration intensity v in horizontal directionmax2Setting:
in the formula, KreFor the reliability factor, 1.3 was taken.
The vertical direction timing margin protection constant value vset1Horizontal direction timing limit protection constant value vset2Respectively according to the maximum vibration intensity v in the vertical direction of the on-load tap-changer under the condition that the on-load tap-changer normally operates and switches when the transformer operates in heavy loadmax1Maximum vibration intensity v in horizontal directionmax2Setting:
in the formula (I), the compound is shown in the specification,
for the reliability factor, 0.8 was taken.
Another object of the present invention is to provide a system for on-load tap-changer non-electrical protection method based on vibration intensity, comprising:
vibration sensor for measuring vertical vibration intensity v of on-load tap-changerrms1And horizontal vibration intensity vrms2；
A digital signal acquisition system for acquiring vertical vibration intensity v output by the vibration sensorrms1And horizontal vibration intensity vrms2Collecting, converting an analog signal output by the vibration sensor into a digital signal, and transmitting the digital signal to the vibration relay;
a vibration relay for receiving the vertical vibration intensity vrms1And horizontal vibration intensity vrms2Will vibrate intensity v in the vertical directionrms1And horizontal vibration intensity vrms2And comparing the current value with the setting value to judge whether the on-load tap-off state is abnormal or not, and outputting a corresponding protection action command according to the comparison result.
The vibration relay is specifically used for judging the vibration intensity v in the vertical directionrms1Vibration quick-break protection instantaneous action setting value greater than vertical direction
Starting the vibration relay to protect the action and cut off the transformer;
if the vibration intensity v is in the horizontal directionrms2Vibration quick-break protection in direction greater than horizontalInstantaneous action setting value
Starting the vibration relay to protect the action and cut off the transformer;
if vibration intensity v in vertical directionrms1Greater than vertical timing margin protection constant vset1Then the first timer vibrates intensity v to the vertical directionrms1Greater than vertical timing margin protection constant vset1Timing if the duration time reaches the preset delay time tset1If the voltage is lower than the preset voltage, the vibration relay is started to protect the transformer and cut off the transformer;
if the vibration intensity v is in the horizontal directionrms2Greater than horizontal timing limit protection constant value vset2Then the second timer vibrates intensity v to the horizontal directionrms2Greater than horizontal timing limit protection constant value vset2Timing if the duration time reaches the preset delay time tset2And then the vibration relay is started to protect the transformer and cut off the transformer.
The digital signal acquisition system acquires a vibration quick-break protection instantaneous action setting value in the vertical direction
Vibration quick-break protection instantaneous action setting value in horizontal direction
Respectively according to the maximum vibration intensity v in the vertical direction in the oil conservator connecting pipe under the condition of normal operation switching of the on-load tap-changer during the maximum load operation of the transformermax1Maximum vibration intensity v in horizontal directionmax2Setting:
in the formula, KreFor the reliability factor, 1.3 was taken.
The vibration relay receives a fixed value v of timing limit protection in the vertical directionset1Horizontal direction timing limit protection constant value vset2Respectively according to the maximum vibration intensity v in the vertical direction of the on-load tap-changer under the condition that the on-load tap-changer normally operates and switches when the transformer operates in heavy loadmax1Maximum vibration intensity v in horizontal directionmax2Setting:
in the formula (I), the compound is shown in the specification,
for the reliability factor, 0.8 was taken.
According to the technical scheme, the beneficial effects of the invention are as follows: firstly, the vibration intensity information of the on-load tap-changer is taken as a criterion quantity, the principles of quick-break protection and fixed time limit protection are combined, a vibration sensor is arranged at the top of the on-load tap-changer of the transformer, the vibration intensity information is transmitted to a vibration relay in real time, and the on-load tap-changer can act quickly when the vibration intensity of the on-load tap-changer of the transformer is abnormally increased; secondly, when the on-load switch of the transformer cannot be judged to be in fault only through the vibration intensity information, the misoperation caused by overlarge vibration intensity in the normal switching process of the on-load tap-changer is avoided through time delay setting.
Drawings
FIG. 1 is a flow chart of the method of the present invention.
Fig. 2 is a schematic view of the installation position of the vibration sensor in the present invention.
Detailed Description
As shown in fig. 1, a vibration intensity-based on-load tap-changer non-electricity protection method includes the following steps:
(1) vertical vibration intensity v of on-load tap-changer is obtained through vibration sensor 1rms1And horizontal vibration intensity vrms2And transmitting the vibration intensity information to a vibration relay through a data signal acquisition system;
(2) the vibration relay judges the received vertical vibration intensity vrms1And horizontal vibration intensity vrms2The size of (2):
if vibration intensity v in vertical directionrms1Vibration quick-break protection instantaneous action setting value greater than vertical direction
Starting the vibration relay to protect the action and cut off the transformer;
if the vibration intensity v is in the horizontal directionrms2Vibration quick-break protection instantaneous action setting value larger than horizontal direction
Starting the vibration relay to protect the action and cut off the transformer;
if vibration intensity v in vertical directionrms1Greater than vertical timing margin protection constant vset1Then the first timer vibrates intensity v to the vertical directionrms1Greater than vertical timing margin protection constant vset1Timing if the duration time reaches the preset delay time tset1If the voltage is lower than the preset voltage, the vibration relay is started to protect the transformer and cut off the transformer;
if the vibration intensity v is in the horizontal directionrms2Greater than horizontal timing limit protection constant value vset2Then the second timer vibrates intensity v to the horizontal directionrms2Greater than horizontal timing limit protection constant value vset2Timing if the duration time reaches the preset delay time tset2If the voltage is lower than the preset voltage, the vibration relay is started to protect the transformer and cut off the transformer;
and (4) if the two are not met, the first timer and the second timer are set to zero, and then the step (1) is skipped to wait for the next round of judgment.
In the step (2), the vibration quick-break protection instantaneous action setting value in the vertical direction
Vibration quick-break protection instantaneous action setting value in horizontal direction
Respectively according to the maximum vibration intensity v in the vertical direction in the oil conservator connecting pipe under the condition of normal operation switching of the on-load tap-changer during the maximum load operation of the transformermax1Maximum vibration intensity v in horizontal directionmax2Setting:
in the formula, KreFor the reliability factor, 1.3 was taken.
The vertical direction timing margin protection constant value vset1Horizontal direction timing limit protection constant value vset2Respectively according to the maximum vibration intensity v in the vertical direction of the on-load tap-changer under the condition that the on-load tap-changer normally operates and switches when the transformer operates in heavy loadmax1Maximum vibration intensity v in horizontal directionmax2Setting:
in the formula (I), the compound is shown in the specification,
to be securedCounting, 0.8.
As shown in fig. 2, the present system includes:
A digital signal acquisition system for acquiring the vertical vibration intensity v output by the vibration sensor 1rms1 and horizontal vibration intensity vrms2Collecting, converting an analog signal output by the vibration sensor 1 into a digital signal, and transmitting the digital signal to a vibration relay;
a vibration relay for receiving the vertical vibration intensity vrms1And horizontal vibration intensity vrms2Will vibrate intensity v in the vertical directionrms1And horizontal vibration intensity vrms2And comparing the current value with the setting value to judge whether the on-load tap-off state is abnormal or not, and outputting a corresponding protection action command according to the comparison result.
In summary, the digital signal acquisition system acquires the output signal of the vibration sensor 1; the vibration relay judges the magnitude v of the received vibration intensityrmsIf the vibration intensity is larger than the vibration quick-break protection instantaneous action setting value
Starting the vibration relay and cutting off the transformer; otherwise, entering the next step; if the vibration intensity is larger than the fixed time limit protection value vsetIf the vibration intensity of the timer is greater than the fixed time limit protection value vsetTiming if the duration time reaches the preset delay time tsetAnd then the vibration relay is started to cut off the transformer. The invention can effectively start when the on-load tap-changer has internal fault, protects reliable action, and simultaneously ensures that the on-load tap-changer does not malfunction when being normally switched by a time delay strategy.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.
Claims (8)
1. A vibration intensity-based on-load tap-changer non-electric quantity protection method is characterized by comprising the following steps: the method comprises the following steps in sequence:
(1) obtaining vertical vibration intensity v of on-load tap-changerrms1And horizontal vibration intensity vrms2；
(2) Judging the vertical vibration intensity vrms1And horizontal vibration intensity vrms2And according to the judgment result, carrying out non-electric quantity protection on the on-load tap-changer.
2. The vibration severity-based on-load tap changer non-electrical protection method according to claim 1, characterized in that: in the step (2):
if vibration intensity v in vertical directionrms1Vibration quick-break protection instantaneous action setting value greater than vertical direction
Starting the vibration relay to protect the action and cut off the transformer;
if the vibration intensity v is in the horizontal directionrms2Vibration quick-break protection instantaneous action setting value larger than horizontal direction
Starting the vibration relay to protect the action and cut off the transformer;
if vibration intensity v in vertical directionrms1Greater than vertical timing margin protection constant vset1Then the first timer vibrates intensity v to the vertical directionrms1Greater than vertical timing margin protection constant vset1Timing the time of (1), if the duration time reaches the preset delay timeTime tset1If the voltage is lower than the preset voltage, the vibration relay is started to protect the transformer and cut off the transformer;
if the vibration intensity v is in the horizontal directionrms2Greater than horizontal timing limit protection constant value vset2Then the second timer vibrates intensity v to the horizontal directionrms2Greater than horizontal timing limit protection constant value vset2Timing if the duration time reaches the preset delay time tset2And then the vibration relay is started to protect the transformer and cut off the transformer.
3. The vibration severity-based on-load tap changer non-electrical protection method according to claim 2, characterized in that: in the step (2), the vibration quick-break protection instantaneous action setting value in the vertical direction
Vibration quick-break protection instantaneous action setting value in horizontal direction
Respectively according to the maximum vibration intensity v in the vertical direction in the oil conservator connecting pipe under the condition of normal operation switching of the on-load tap-changer during the maximum load operation of the transformermax1Maximum vibration intensity v in horizontal directionmax2Setting:
in the formula, KreFor the reliability factor, 1.3 was taken.
4. The vibration severity-based on-load tap changer non-electrical protection method according to claim 2, characterized in that: the vertical direction timing margin protection constant value vset1Horizontal direction timing limit protection constant value vset2Respectively according to the maximum vibration intensity v in the vertical direction of the on-load tap-changer under the condition that the on-load tap-changer normally operates and switches when the transformer operates in heavy loadmax1Maximum vibration intensity v in horizontal directionmax2Setting:
in the formula (I), the compound is shown in the specification,
for the reliability factor, 0.8 was taken.
5. A system of a vibration intensity-based on-load tap-changer non-electric quantity protection method is characterized in that: the method comprises the following steps:
vibration sensor for measuring vertical vibration intensity v of on-load tap-changerrms1And horizontal vibration intensity vrms2；
A digital signal acquisition system for acquiring vertical vibration intensity v output by the vibration sensorrms1And horizontal vibration intensity vrms2Collecting, converting an analog signal output by the vibration sensor into a digital signal, and transmitting the digital signal to the vibration relay;
a vibration relay for receiving the vertical vibration intensity vrms1And horizontal vibration intensity vrms2Will vibrate intensity v in the vertical directionrms1And horizontal vibration intensity vrms2And comparing the current value with the setting value to judge whether the on-load tap-off state is abnormal or not, and outputting a corresponding protection action command according to the comparison result.
6. The method of claim 5The system of (a), characterized by: the vibration relay is specifically used for judging the vibration intensity v in the vertical directionrms1Vibration quick-break protection instantaneous action setting value greater than vertical direction
Starting the vibration relay to protect the action and cut off the transformer;
if the vibration intensity v is in the horizontal directionrms2Vibration quick-break protection instantaneous action setting value larger than horizontal direction
Starting the vibration relay to protect the action and cut off the transformer;
if vibration intensity v in vertical directionrms1Greater than vertical timing margin protection constant vset1Then the first timer vibrates intensity v to the vertical directionrms1Greater than vertical timing margin protection constant vset1Timing if the duration time reaches the preset delay time tset1If the voltage is lower than the preset voltage, the vibration relay is started to protect the transformer and cut off the transformer;
if the vibration intensity v is in the horizontal directionrms2Greater than horizontal timing limit protection constant value vset2Then the second timer vibrates intensity v to the horizontal directionrms2Greater than horizontal timing limit protection constant value vset2Timing if the duration time reaches the preset delay time tset2And then the vibration relay is started to protect the transformer and cut off the transformer.
7. The system of claim 6, wherein: the digital signal acquisition system acquires a vibration quick-break protection instantaneous action setting value in the vertical direction
Vibration quick-break protection instantaneous action setting value in horizontal direction
Respectively according to the maximum vibration intensity v in the vertical direction in the oil conservator connecting pipe under the condition of normal operation switching of the on-load tap-changer during the maximum load operation of the transformermax1Maximum vibration intensity v in horizontal directionmax2Setting:
in the formula, KreFor the reliability factor, 1.3 was taken.
8. The system of claim 6, wherein: the vibration relay receives a fixed value v of timing limit protection in the vertical directionset1Horizontal direction timing limit protection constant value vset2Respectively according to the maximum vibration intensity v in the vertical direction of the on-load tap-changer under the condition that the on-load tap-changer normally operates and switches when the transformer operates in heavy loadmax1Maximum vibration intensity v in horizontal directionmax2Setting:
in the formula (I), the compound is shown in the specification,
for the reliability factor, 0.8 was taken.
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| CN202110009247.XA CN112857287A (en) | 2021-01-05 | 2021-01-05 | Non-electric quantity protection method and system for on-load tap-changer based on vibration intensity |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206609522U (en) * | 2017-03-09 | 2017-11-03 | 江苏永佳光电科技有限公司 | A kind of vibration-testing apparatus of current transformer |
| CN107833733A (en) * | 2017-10-27 | 2018-03-23 | 雷先琴 | A kind of automatic monitored control system for oil tank of transformer |
| CN108390356A (en) * | 2018-03-21 | 2018-08-10 | 广东电网有限责任公司电力科学研究院 | A kind of grave gas guard method based on fault time feature |
| CN208223766U (en) * | 2018-05-17 | 2018-12-11 | 成都威尔森科技发展有限责任公司 | A kind of rotating machinery vibrating earthquake intensity detection system |
| CN110132404A (en) * | 2019-05-29 | 2019-08-16 | 国网江苏省电力有限公司南京供电分公司 | A kind of on-load tap changers of transformers mechanical breakdown on-line monitoring method |
-
2021
- 2021-01-05 CN CN202110009247.XA patent/CN112857287A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206609522U (en) * | 2017-03-09 | 2017-11-03 | 江苏永佳光电科技有限公司 | A kind of vibration-testing apparatus of current transformer |
| CN107833733A (en) * | 2017-10-27 | 2018-03-23 | 雷先琴 | A kind of automatic monitored control system for oil tank of transformer |
| CN108390356A (en) * | 2018-03-21 | 2018-08-10 | 广东电网有限责任公司电力科学研究院 | A kind of grave gas guard method based on fault time feature |
| CN208223766U (en) * | 2018-05-17 | 2018-12-11 | 成都威尔森科技发展有限责任公司 | A kind of rotating machinery vibrating earthquake intensity detection system |
| CN110132404A (en) * | 2019-05-29 | 2019-08-16 | 国网江苏省电力有限公司南京供电分公司 | A kind of on-load tap changers of transformers mechanical breakdown on-line monitoring method |
Non-Patent Citations (1)
| Title |
|---|
| 苏长宝等: "基于振动检测的变压器有载分接开关状态监测系统", 《电力电子》, pages 3 - 4 * |
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