CN108490346B - Method and device for monitoring rotary fuse - Google Patents
Method and device for monitoring rotary fuse Download PDFInfo
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- CN108490346B CN108490346B CN201810478296.6A CN201810478296A CN108490346B CN 108490346 B CN108490346 B CN 108490346B CN 201810478296 A CN201810478296 A CN 201810478296A CN 108490346 B CN108490346 B CN 108490346B
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- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
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Abstract
The invention discloses a method and a device for monitoring a rotary fuse, and belongs to the technical field of circuit product monitoring. The method comprises the following steps: acquiring the original value of the exciting current of each operating point; determining a voltage threshold of a gap pole according to the original value of the exciting current; and when the voltage data of the interpole of each operating point exceeds the voltage threshold value of the interpole, sending out an alarm signal. The method for monitoring the rotary fuse obtains the voltage threshold of the intermediate pole of the rotary rectifying device in the normal working state by utilizing the exciting current, and compares the actual voltage threshold of the intermediate pole with the voltage threshold of the intermediate pole, so that the whole-process accurate monitoring of the working state of the rotary rectifying device is realized, and the problem of false alarm caused by only taking the voltage of the intermediate pole as the reference in the prior art is solved.
Description
Technical Field
The invention relates to the technical field of circuit product monitoring, in particular to a method and a device for monitoring a rotary fuse.
Background
The fuse is an electric appliance which fuses a melt by heat generated by itself to open a circuit when a current exceeds a predetermined value.
The brushless excitation generator set is composed of a generator, a rotary rectifying device and an exciter, and is characterized in that one of the brushless excitation generator set is free of a collecting ring and a carbon brush, a generator rotor, the rotary rectifying device and an exciter armature are coaxially arranged, and the generator rotor, the rotary rectifying device and the exciter armature synchronously rotate together during operation; the exciting current is indirectly provided by the exciter stator, and the direct current excitation is provided for the generator rotor after the power amplification and the rotation rectifying device are carried out by the exciter.
In order to meet the monitoring requirement of the rotating fuse, a 'inter-pole winding' is arranged between stator magnetic poles of the exciter and is used for collecting inter-pole voltage of rotor armature reaction. When the rectifying device works normally, the amplitude of the voltage of the time pole is increased or decreased along with the increase or decrease of the load of the generator; when the rectifying device fails, the signal amplitude of the voltage at the intermediate pole is greatly changed.
The existing monitoring device of the rotary fuse judges the working state of the rotary rectifying device through the amplitude of the voltage of the interpole, and sets an alarm threshold through the threshold value of the voltage of the interpole. The existing rotary fuse monitoring device only takes the inter-pole voltage as a reference, so that false alarm can occur in the actual use process, and when the generator works under light load, even if the rotary rectifying device has a problem, the signal amplitude of the inter-pole voltage does not reach the threshold value, no alarm can be given; in addition, when the generator is in a light overload state, an alarm is given.
Disclosure of Invention
The embodiment of the invention provides a method and a device for monitoring a rotary fuse, which aim to solve the problem that the conventional method and device for monitoring the rotary fuse only use a voltage of a gap pole as a reference and can generate false alarm. The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview and is intended to neither identify key/critical elements nor delineate the scope of such embodiments. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is presented later.
According to a first aspect of embodiments of the present invention, there is provided a rotary fuse monitoring method, including: acquiring the original value of the exciting current of each operating point; determining a voltage threshold of a gap pole according to the original value of the exciting current; and when the voltage data of the interpole of each operating point exceeds the voltage threshold value of the interpole, sending out an alarm signal.
In some optional embodiments, the method comprises: the acquiring of the original value of the exciting current of each operating point includes: and acquiring the original value of the exciting current of each operating point through an exciting current acquisition module.
The determining the inter-pole voltage threshold value according to the original value of the exciting current comprises the following steps: and inputting the original values of the exciting currents of the operating points into a direct current transmitter, and converting the original values of the exciting currents into current signals by the direct current transmitter.
After the direct current transmitter converts the original value of the exciting current into a current signal, the method further comprises the following steps: and inputting the current signal into a programmable controller, and analyzing and converting the current signal into the interpole voltage threshold corresponding to each operating point by the programmable controller.
Determining the function relation of the interpolar voltage threshold as Uu2＝7×Ui2×Kimax/KumaxWherein, Uu2Is a threshold of a voltage between poles, Ui2As a current signal, KimaxIs the maximum value of input range of DC current transducer, KumaxThe maximum value of the input range of the direct-current voltage transducer is obtained.
When the voltage data of the interpole of each operating point exceeds the voltage threshold of the interpole, an alarm signal is sent out, and the method comprises the following steps: and acquiring the original value of the inter-pole voltage of each operating point through the inter-pole detection coil.
When the voltage data of the interpole of each operating point exceeds the voltage threshold of the interpole, an alarm signal is sent out, and the method comprises the following steps: and inputting the original value of the interpole voltage of each operating point into a direct-current voltage transmitter, and converting the original value of the interpole voltage into a voltage signal by the direct-current voltage transmitter.
When the voltage data of the interpole of each operating point exceeds the voltage threshold of the interpole, an alarm signal is sent out, and the method comprises the following steps: and inputting the voltage signal into a programmable controller, and analyzing and converting the voltage signal into the interpole voltage data corresponding to each operating point by the programmable controller.
When the voltage data of the interpole of each operating point exceeds the voltage threshold of the interpole, an alarm signal is sent out, and the method comprises the following steps: and when the voltage data of the interpole of each operating point does not exceed the voltage threshold of the interpole, starting a normal operation indicator lamp.
According to a second aspect of embodiments of the present invention, there is provided a rotary fuse monitoring device comprising: the excitation current acquisition module is used for acquiring the original value of the excitation current of each operating point; the determining module is used for determining a voltage threshold of the interpole according to the original value of the exciting current; and the main control module is used for sending out an alarm signal when the voltage data of the interpole of each operating point exceeds the voltage threshold of the interpole.
In some optional embodiments, the rotary fuse monitoring device further comprises a monitoring module for remotely receiving the alarm signal.
The determination module comprises a direct current transmitter and a programmable controller, wherein the direct current transmitter is used for converting an original value of the exciting current into a current signal, and the programmable controller is used for analyzing the current signal and converting the current signal into a voltage threshold value of a gap pole corresponding to each operating point.
The main control module comprises a interpole detection coil and a direct-current voltage transmitter, wherein the interpole detection coil is used for acquiring an initial value of interpole voltage of each operating point, and the direct-current voltage transmitter is used for converting the initial value of the interpole voltage into a voltage signal. The direct-current voltage transmitter is connected with the programmable controller, and the programmable controller analyzes and converts the voltage signals into interpole voltage data corresponding to each operating point.
The technical scheme provided by the embodiment of the invention has the following beneficial effects:
the method for monitoring the rotary fuse obtains the voltage threshold of the intermediate pole of the rotary rectifying device in the normal working state by utilizing the exciting current, and compares the actual voltage threshold of the intermediate pole with the voltage threshold of the intermediate pole, so that the whole-process accurate monitoring of the working state of the rotary rectifying device is realized, and the problem of false alarm caused by only taking the voltage of the intermediate pole as the reference in the prior art is solved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a schematic flow diagram illustrating a method of monitoring a rotary fuse in accordance with an exemplary embodiment;
FIG. 2 is a block diagram illustrating the structure of a rotary fuse monitoring device in accordance with an exemplary embodiment.
Detailed Description
The following description and the drawings sufficiently illustrate specific embodiments of the invention to enable those skilled in the art to practice them. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. The scope of embodiments of the invention encompasses the full ambit of the claims, as well as all available equivalents of the claims. Embodiments may be referred to herein, individually or collectively, by the term "invention" merely for convenience and without intending to voluntarily limit the scope of this application to any single invention or inventive concept if more than one is in fact disclosed. Herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without 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, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed. The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. For the structures, products and the like disclosed by the embodiments, the description is relatively simple because the structures, the products and the like correspond to the parts disclosed by the embodiments, and the relevant parts can be just described by referring to the method part.
FIG. 1 is a flow diagram illustrating a method of monitoring a rotary fuse in accordance with an exemplary embodiment.
As shown in fig. 1, the present invention provides a method for monitoring a rotary fuse, which can overcome the problem of false alarm caused by only using the interpolar voltage as a reference in the prior art, and meet the requirement of accurately monitoring the operating state of a rotary rectifying device in the whole process. Specifically, the monitoring method comprises the following steps:
step S101, acquiring an original value of an exciting current of each operating point;
step S102, determining a voltage threshold of a interpole according to an original value of an exciting current;
step S103, judging whether the inter-pole voltage data of each operating point exceeds an inter-pole voltage threshold, if so, executing step S104, and if not, repeatedly executing the judging step of step S103;
and step S104, sending out an alarm signal.
In this embodiment, as a preferable case, the step S101 obtains an original value of the excitation current at each operation point, and the steps mainly include: and acquiring the original value of the exciting current of each operating point through an exciting current acquisition module.
Step S102, according to the original value of the exciting current, determining a gap pole voltage threshold value, and the steps mainly comprise: inputting the original values of the exciting currents of the operating points into a direct current transmitter, and converting the original values of the exciting currents into current signals by the direct current transmitter; and inputting the current signal into a programmable controller, and analyzing and converting the current signal into the interpole voltage threshold corresponding to each operating point by the programmable controller.
Step S103 determines whether the gate voltage data of each operating point exceeds a gate voltage threshold, and the steps mainly include: acquiring an original value of a interpole voltage of each operating point through a interpole detection coil; inputting the original value of the interpole voltage of each operating point into a direct-current voltage transmitter, and converting the original value of the interpole voltage into a voltage signal by the direct-current voltage transmitter; and inputting the voltage signal into a programmable controller, and analyzing and converting the voltage signal into the interpole voltage data corresponding to each operating point by the programmable controller.
In this embodiment, as a preferable condition, when the data of the inter-pole voltage of each operating point does not exceed the threshold of the inter-pole voltage, the normal operation indicator lamp is turned on to indicate that the rotating rectification device operates normally.
And when the voltage data of the interpole of each operating point exceeds the voltage threshold of the interpole, executing the step S104 and sending out an alarm signal.
FIG. 2 is a block diagram illustrating the structure of a rotary fuse monitoring device in accordance with an exemplary embodiment.
As shown in fig. 2, the present invention further provides a monitoring apparatus 200 for a rotary fuse, where the monitoring apparatus 200 can be applied to the monitoring method process in the foregoing embodiment to monitor the operating state of the rotary fuse, and specifically, the monitoring apparatus 200 includes:
an excitation current collecting module 210, configured to obtain an original value of an excitation current at each operating point;
a determining module 220, configured to determine a gap pole voltage threshold according to the original value of the excitation current;
the main control module 230 is configured to send an alarm signal when the voltage data of the inter-pole at each operating point exceeds the voltage threshold of the inter-pole.
The device 200 for monitoring the rotary fuse obtains the voltage threshold of the intermediate pole of the rotary rectifying device in the normal working state by utilizing the exciting current, and compares the actual voltage threshold of the intermediate pole with the voltage threshold of the intermediate pole, so that the whole-process accurate monitoring of the working state of the rotary rectifying device is realized, and the problem of false alarm caused by only taking the voltage of the intermediate pole as the reference in the prior art is solved.
In this embodiment, the determining module 220 preferably includes a dc current transducer 221 and a programmable controller 222, wherein the dc current transducer 221 is configured to convert the original value of the exciting current into a current signal, and the programmable controller 222 is configured to analyze and convert the current signal into a voltage threshold of the interpole corresponding to each operating point.
The main control module 230 includes a gap detection coil 231 and a dc voltage transmitter 232, wherein the gap detection coil 231 is used for acquiring an original gap voltage value of each operating point, and the dc voltage transmitter 232 is used for converting the original gap voltage value into a voltage signal. The dc voltage transmitter 232 is connected to the programmable controller 222, and the programmable controller 222 analyzes and converts the voltage signal into voltage data corresponding to the inter-pole voltage of each operating point.
The monitoring device 200 further comprises a monitoring module 240, and the monitoring module 240 is configured to remotely receive the alarm signal.
It is to be understood that the present invention is not limited to the procedures and structures described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, and/or components.
The corresponding structures, materials, acts, and equivalents of all means or step plus function elements in the claims below are intended to include any structure, material, or act for performing the function in combination with other claimed elements as specifically claimed. The description of the present invention has been presented for purposes of illustration and description, but is not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope of the invention. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.
Claims (5)
1. A method of monitoring a rotary fuse, comprising:
acquiring the original value of the exciting current of each operating point;
when the voltage data of the interpole of each operating point exceeds the threshold value of the interpole voltage determined according to the original value of the exciting current, an alarm signal is sent out;
the step of determining the inter-pole voltage threshold according to the original value of the excitation current comprises the following steps: inputting the original values of the exciting currents of all the operating points into a direct current transmitter, and converting the original values of the exciting currents into current signals by the direct current transmitter;
inputting the current signal into a programmable controller, and analyzing and converting the current signal into a voltage threshold of a gap pole corresponding to each operating point by the programmable controller;
determining the function relation of the interpolar voltage threshold as Uu2＝7×Ui2×Kimax/KumaxWherein, Uu2Is a threshold of a voltage between poles, Ui2As a current signal, KimaxIs the maximum value of input range of DC current transducer, KumaxThe maximum value of the input measuring range of the direct-current voltage transducer is obtained;
when the voltage data of the interpole of each operating point exceeds the voltage threshold of the interpole, an alarm signal is sent out, and the method comprises the following steps: acquiring an original value of a interpole voltage of each operating point through a interpole detection coil;
inputting the original value of the interpole voltage of each operating point into a direct-current voltage transmitter, and converting the original value of the interpole voltage into a voltage signal by the direct-current voltage transmitter;
and inputting the voltage signal into a programmable controller, and analyzing and converting the voltage signal into interpole voltage data corresponding to each operating point by the programmable controller.
2. The method according to claim 1, wherein the obtaining of the original value of the excitation current at each operating point comprises: and acquiring the original value of the exciting current of each operating point through an exciting current acquisition module.
3. The method of claim 1, wherein said issuing an alarm signal when the ultor voltage data for each operating point exceeds the ultor voltage threshold comprises: and when the voltage data of the interpole of each operating point does not exceed the voltage threshold of the interpole, starting a normal operation indicator lamp.
4. A rotary fuse monitoring device, comprising:
the excitation current acquisition module is used for acquiring the original value of the excitation current of each operating point;
the main control module is used for sending out an alarm signal when the voltage data of the interpole of each operating point exceeds the voltage threshold value of the interpole determined according to the original value of the exciting current;
the step of determining the inter-pole voltage threshold according to the original value of the excitation current comprises the following steps: inputting the original values of the exciting currents of all the operating points into a direct current transmitter, and converting the original values of the exciting currents into current signals by the direct current transmitter;
inputting the current signal into a programmable controller, and analyzing and converting the current signal into a voltage threshold of a gap pole corresponding to each operating point by the programmable controller;
determining the function relation of the interpolar voltage threshold as Uu2＝7×Ui2×Kimax/KumaxWherein, Uu2Is a threshold of a voltage between poles, Ui2As a current signal, KimaxIs the maximum value of input range of DC current transducer, KumaxThe maximum value of the input measuring range of the direct-current voltage transducer is obtained;
the main control module comprises a interpole detection coil, and the interpole detection coil is used for acquiring the interpole voltage original value of each operating point;
the main control module also comprises a direct-current voltage transmitter, and the direct-current voltage transmitter is used for converting the original value of the interpole voltage into a voltage signal;
and the programmable controller analyzes the voltage signal and converts the voltage signal into interpolar voltage data corresponding to each operating point.
5. The apparatus of claim 4, further comprising a monitoring module for remotely receiving the alarm signal.
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| CN201810478296.6A CN108490346B (en) | 2018-05-18 | 2018-05-18 | Method and device for monitoring rotary fuse |
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| CN201810478296.6A CN108490346B (en) | 2018-05-18 | 2018-05-18 | Method and device for monitoring rotary fuse |
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| CN110703161A (en) * | 2019-09-18 | 2020-01-17 | 国网江苏省电力有限公司淮安市洪泽区供电分公司 | Distribution lines fuse on-line monitoring system |
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