CN217587384U - Wireless current acquisition sensor device of lightning arrester live detector - Google Patents
Wireless current acquisition sensor device of lightning arrester live detector Download PDFInfo
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- CN217587384U CN217587384U CN202221297034.8U CN202221297034U CN217587384U CN 217587384 U CN217587384 U CN 217587384U CN 202221297034 U CN202221297034 U CN 202221297034U CN 217587384 U CN217587384 U CN 217587384U
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Abstract
The utility model discloses an electrified detector current wireless acquisition sensor device of arrester relates to arrester monitoring technology field, include: the lightning arrester comprises a current sensor, a signal regulator, a host and a communication module, wherein the current sensor is arranged on a discharge lead of the lightning arrester, the output end of the current sensor is connected with the signal regulator, and the signal regulator is connected with the host through the communication module; the signal regulator comprises an I/V converter, an A/D converter, a DSP signal processor, a CPU processor and an excitation current compensation circuit; the output end of the current sensor is connected with the I/V converter, the output end of the I/V converter is connected with the A/D converter, the output end of the A/D converter is connected with the DSP signal processor, the output end of the DSP signal processor is connected with the CPU processor, the CPU processor is connected with the communication module, and the CPU processor feeds back a processing signal to the input end of the I/V converter through the excitation current compensation circuit. The utility model discloses simple structure is reliable, and test job site's practicality is strong, and field test is safe, high-efficient, accurate.
Description
Technical Field
The utility model relates to an arrester monitoring technology field, concretely relates to electrified detector current wireless acquisition sensor device of arrester.
Background
The current acquisition device of the arrester live detector in the current market is mainly in a wired acquisition mode, is in the middle of the power industry, and is not used for the current acquisition link of the arrester live detector in the power industry by using a current wireless acquisition technology.
When the lightning arrester live detection test is carried out, the traditional lightning arrester live detection instrument firstly inserts a leakage current signal acquisition line plug into the instrument, and then clamps (or is connected with the upper end of the MOA discharge counter through an insulating rod) the other end of the traditional lightning arrester live detection instrument. The three-phase distance of the 750kV transformer substation lightning arrester A, B, C is long, so that the length of the current signal acquisition line is too long. The longer the current signal acquisition line length is, the more the signal acquisition will have the attenuation of different degrees, and the good or bad signal acquisition of line insulation also can produce showing the influence to the test result, because the acquisition line is longer and the arrester is far away apart from the three-phase, the wiring in-process makes a round trip to pull the acquisition line and breaks easily, will influence arrester resistive current and high frequency partial discharge test, can not in time master equipment status.
At present, the electrified detection current of the arrester in a power grid system is generally acquired in a wired mode, the acquisition wire clamp is generally clamped at the upper end and the lower end of an MOA discharge counter of a tested arrester, when the voltage level of the tested arrester is not high, the distance between three-phase arresters is not large, and under the condition that the diameters of wiring terminals at the two ends of the MOA discharge counter are not large, the acquisition wire crocodile clamp can achieve relatively firm clamping and good contact. However, the wiring fixing mode has many hidden dangers on the ultra-high voltage equipment with a high arrester voltage level and a large three-phase distance, firstly, the length of the acquisition line is long due to the high position of the current acquisition clamping point of the arrester, the crocodile clamp of the acquisition line needs to bear the weight of more test lines, and the clamping reliability is reduced; secondly, as the thickness of wiring terminals at two ends of an MOA discharge counter of the ultra-high arrester and the diameter of a bolt at a protruding part are greatly increased, the crocodile clip can be clamped only by stretching a larger angle, and the clamping reliability is also reduced; in addition, the clamping mode is easy to fall off when external force is generated by mistakenly touching the test wire in a wiring link, so that current is suddenly interrupted in the test process, and the test fails; finally, the crocodile clip is enabled to bear the gravity caused by the weight of the test line for a long time in the clamping mode, and the service life of the crocodile clip for collecting the line is greatly shortened; in the prior art, the size of an acquisition line crocodile wire clamp is increased limitedly, the size cannot be increased without limit, and in addition, a large-caliber clamp is large in size and mass, the required force is large when a clamping opening is opened and the clamp is taken down, the practical operation is very inconvenient, the contact reliability is only increased relatively, and the problems of improving the service life mode of a current acquisition device of the electrified arrester, preventing the drop of the acquisition line crocodile wire clamp and the like are not substantially improved.
SUMMERY OF THE UTILITY MODEL
In order to solve the defects existing in the prior art, the utility model provides a wireless acquisition sensor device of lightning arrester live detector electric current.
The utility model provides a technical scheme does:
the utility model provides a wireless acquisition sensor device of arrester live detector electric current, includes:
the lightning arrester comprises a current sensor, a signal regulator, a host and a communication module, wherein the current sensor is arranged on a discharge lead of the lightning arrester, the output end of the current sensor is connected with the signal regulator, and the signal regulator is connected with the host through the communication module;
the signal regulator comprises an I/V converter, an A/D converter, a DSP signal processor, a CPU processor and an excitation current compensation circuit; the output end of the current sensor is connected with the I/V converter, the output end of the I/V converter is connected with the A/D converter, the output end of the A/D converter is connected with the DSP signal processor, the output end of the DSP signal processor is connected with the CPU processor, the CPU processor is connected with the communication module, and the CPU processor feeds back a processing signal to the input end of the I/V converter through the excitation current compensation circuit.
As the utility model discloses a further technical scheme does, signal conditioner is 433MHZ wireless communication module, 433MHZ wireless communication module includes power amplifier, monostable circuit and voltage control oscillator, monostable circuit is connected to power amplifier's output, voltage control oscillator is connected to monostable circuit's output.
As a further technical scheme of the utility model, the current sensor is a zero magnetic flux sensor made of ultracrystalline materials.
As a further technical scheme of the utility model, current sensor's shell is antimagnetic 316L stainless steel hard shell.
As a further technical scheme of the utility model does, adopt bellows connection between current sensor and the signal conditioner, and the connecting wire between current sensor and the signal conditioner adopts the thermistor line.
As a further technical solution of the present invention is, the current sensor further includes a high-frequency current sensor and a fundamental frequency current sensor.
As a further technical scheme of the utility model do, current sensor is opening punching current sensor, opening punching current sensor's internal diameter is one of 50mm, 80mm, 100 mm.
The utility model has the advantages that:
the utility model provides a pair of electrified detector current wireless collection system of arrester, its simple structure is reliable, strong to the practicality of test job site, the problem that the fixed insecure current signal that leads to of wired collection fastener is big that leads to can't gather and gather the longer work load of line in the field test in-process has been solved, the problem that the electrified detector current collection fastener of traditional arrester dropped has been solved to open type cross-core sensor simultaneously, simultaneously because open type cross-core sensor bore has designed different diameters, can adapt to the demand of the arrester test of multiple different voltage levels, for on-the-spot safety, high efficiency, accurate test provides the scheme.
Drawings
Fig. 1 is a structure diagram of a current wireless acquisition sensor device of an electrified arrester detector;
fig. 2 is a schematic circuit diagram of a wireless current collection sensor device of an electrified lightning arrester detector;
fig. 3 is the schematic diagram of the feed-through current transformer provided by the utility model.
Detailed Description
The conception, the specific structure, and the technical effects produced by the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the features, and the effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and other embodiments obtained by those skilled in the art without inventive labor based on the embodiments of the present invention all belong to the protection scope of the present invention.
Referring to fig. 1 and 2, a wireless current collection sensor device of an arrester live detector comprises:
the lightning arrester comprises a current sensor 10, a signal regulator 20, a host 30 and a communication module 40, wherein the current sensor is arranged on a lightning arrester discharge lead, the output end of the current sensor is connected with the signal regulator, and the signal regulator is connected with the host through the communication module;
the signal regulator comprises an I/V converter, an A/D converter, a DSP signal processor, a CPU processor and an excitation current compensation circuit; the output end of the current sensor is connected with the I/V converter, the output end of the I/V converter is connected with the A/D converter, the output end of the A/D converter is connected with the DSP signal processor, the output end of the DSP signal processor is connected with the CPU processor, the CPU processor is connected with the communication module, and the CPU processor feeds back a processing signal to the input end of the I/V converter through the excitation current compensation circuit.
The utility model discloses utilize feedthrough current sensor and wireless sensing technology of automatic compensation exciting current to constitute an opening feedthrough current transformer and press from both sides on the MOA of arrester discharge counter one end lead wire, insert signal conditioner (feedthrough current sensor of automatic compensation exciting current) in feedthrough current transformer one end, under the current variation and the temperature variation condition in on a large scale, can ensure the degree of accuracy of transform) the design of antimagnetic 316L stainless steel is adopted to the feedthrough current sensor shell, effectively overcome on-the-spot electromagnetic interference, the device communication adopts wireless communication. The current synchronous sensor is a core part of a current wireless acquisition device, mainly extracts phase and amplitude information from a detected signal and uploads the phase and amplitude information to a host computer of the lightning arrester live detector in a wireless manner. The utility model discloses guaranteed the complete collection of arrester full current, compared the wired collection system of traditional arrester live detector electric current, accurate, the safety of proof test, high-efficient implementation.
The utility model provides a wireless acquisition sensor device of arrester live-line detection electric current combines together zero magnetic flow sensor, fourier transform and wireless synchronization technique, accomplishes the measurement to the quilt survey signal, and the high integration of device makes measuring accuracy high, and the reliability is high, and the interference killing feature is strong.
The current sensor processes and uploads the collected current information through the I/V converter, the exciting current compensation circuit, the A/D converter, the DSP signal processor and the CPU processor, and the I/V converter and the exciting current compensation circuit complete the conversion of the measured signal in a zero magnetic flux state; the DSP signal processor performs Fourier transform on the signals converted by the A/D converter to obtain phase and amplitude information of the detected signals; the CPU management unit completes all control and management functions; the communication module completes synchronization and data transmission in a wireless transmission mode. The embodiment of the utility model provides an in, the I/V converter is used for converting the current signal that current sensor detected into voltage signal, and the AD converter is digital signal with analog voltage signal conversion, handles the digital signal of conversion and transmits to the CPU treater through DSP signal processor, realizes the collection and the transmission of the electrified detector current signal of arrester. The model and the circuit to I/V converter, AD converter, DSP signal processor and CPU treater do not do the restriction, in order to realize the utility model discloses in the function of each circuit part be the standard.
In the embodiment of the utility model provides an in, current sensor is the sensor that has standard turn ratio, and its error is aroused by sensor excitation current. If the magnetic permeability of the iron core is infinite, the ratio of the primary current I1P and the secondary current I2P of the sensor is a constant N2P/N1P, and the sensor has no specific difference and no angular difference. But actually, the magnetic permeability cannot be infinite, and in order to reduce the measurement error, besides improving the accuracy of the sensor, the accuracy of the sensor can also be improved by adopting a method of error current compensation. The utility model discloses an excitation current compensating circuit provides the compensation for current sensor, see fig. 3, and I1P, I2P, IWA is sensor primary current, secondary current and excitation current respectively in the picture, because the existence I2P of IWA = I1P-IWA if not add the compensation then produces measuring error. Therefore, a current source I 'is connected in parallel to the load, and I' = IWA load gets a current I2P = I1P-IWA + I '= I1P, in an ideal case, the current that transits in the load will be exactly equal to the primary current I1P, and when I' = IWA, the error is zero.
The embodiment of the utility model provides an in punching current transformer the inside superpose fundamental frequency current transformer, high frequency current transformer, satisfy arrester high frequency partial discharge test, full current, resistive current test simultaneously. The signal conditioner and the host machine are in wireless communication;
the feed-through current transformer in fig. 2 is designed as a non-inductive part in an automatic compensation mode, and is slightly influenced by temperature, vibration and a hysteresis loop; the ultra-microcrystalline material with high magnetic permeability is adopted, so that the linearity and the stability are higher, and the performance is better; the single-turn core-penetrating structure is adopted, and the safety of the tested equipment is never influenced; the shell is designed by adopting antimagnetic 316L stainless steel, and can prevent rain, moisture, rust, electromagnetic interference and the like; the adoption of a standardized design can lead to the adoption of the standard design, has good interchangeability.
In fig. 2, the host integrates the lightning arrester full current and resistive current test module and the lightning arrester high-frequency partial discharge test module at the same time, so that the requirements of one instrument for measuring the lightning arrester full current and resistive current and the lightning arrester high-frequency partial discharge are met, and the equipment condition state can be mastered more comprehensively. The embodiment of the utility model provides an in, mainly for receiving the signal that current sensor gathered to the host computer, realize the wireless upload of data through communication module to can receive the signal of current sensor transmission and be given first place to, and monitor it, do not do the restriction to the concrete model of host computer.
In fig. 2, a communication module in the current collection device is a 433MHZ wireless communication module, the 433MHZ wireless communication module includes a power amplifier, a monostable circuit and a voltage control oscillator, an output end of the power amplifier is connected with the monostable circuit, and an output end of the monostable circuit is connected with the voltage control oscillator. The module itself radiates very little. The high-frequency radio frequency technology is adopted, and the radio frequency transmitter has a plurality of working frequency bands, and is mainly long in transmission distance, low in power consumption and high in reliability.
The embodiment of the utility model provides an in, the sensor part can be adjusted the sensor according to different voltage class arresters, preferred zero magnetic flux sensor.
The embodiment of the utility model provides an in, the selection of sensor magnetic core material, current magnetic core material have the silicon steel sheet, slope mould alloy etc. and we adopt newest ultracrystalline material through a large amount of analysis experiments, and the comprehensive index such as the magnetic permeability of this material, linear section and stability is stronger than above-mentioned material, more is fit for doing the magnetic core material for the current sensor.
In the embodiment of the utility model provides an in, the design of antimagnetic 316L stainless steel is preferentially adopted to the hard shell of cross core current sensor shell. The connecting wire between feed-through current transformer and the signal conditioner adopts the bellows to be connected, and the signal transmission intensity is preferred to select for the connecting wire, preferred thermistor line that adopts.
The embodiment of the utility model provides an in, select for use wireless transmission mode, preferred selection signal conditioner between wireless collection system of electric current and the electrified host computer that detects of arrester.
The embodiment of the utility model provides an in, opening punching sensor need install high frequency current sensor, fundamental frequency current sensor additional, satisfies arrester high frequency partial discharge test, full current, resistive current test simultaneously.
The embodiment of the utility model provides an in, opening punching current sensor's structure should be adjusted according to the discharge counter wiring downlead size of on-the-spot arrester, can set up opening punching current sensor internal diameter into internal diameter 50mm, 80mm, three kinds of not unidimensional in 100mm in order to be equipped with different producers, different model arresters and use.
The utility model provides a pair of electrified detector current wireless collection system of arrester, its simple structure is reliable, strong to the practicality of test job site, the problem that the fixed insecure current signal that leads to of wired collection fastener is big that leads to can't gather and gather the longer work load of line in the field test in-process has been solved, the problem that the electrified detector current collection fastener of traditional arrester dropped has been solved to open type cross-core sensor simultaneously, simultaneously because open type cross-core sensor bore has designed different diameters, can adapt to the demand of the arrester test of multiple different voltage levels, for on-the-spot safety, high efficiency, accurate test provides the scheme.
The present invention has been described in detail, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge range of those skilled in the art. Many other changes and modifications can be made without departing from the spirit and scope of the invention. It is to be understood that the invention is not to be limited to the specific embodiments, and that the scope of the invention is defined by the appended claims.
Claims (7)
1. The utility model provides a wireless acquisition sensor device of arrester live detector electric current which characterized in that includes:
the lightning arrester comprises a current sensor, a signal regulator, a host and a communication module, wherein the current sensor is arranged on a discharge lead of the lightning arrester, the output end of the current sensor is connected with the signal regulator, and the signal regulator is connected with the host through the communication module;
the signal regulator comprises an I/V converter, an A/D converter, a DSP signal processor, a CPU processor and an excitation current compensation circuit; the output end of the current sensor is connected with the I/V converter, the output end of the I/V converter is connected with the A/D converter, the output end of the A/D converter is connected with the DSP signal processor, the output end of the DSP signal processor is connected with the CPU processor, the CPU processor is connected with the communication module, and the CPU processor feeds back a processing signal to the input end of the I/V converter through the excitation current compensation circuit.
2. The device of claim 1, wherein the signal conditioner is a 433MHz wireless communication module, the 433MHz wireless communication module comprises a power amplifier, a monostable circuit and a voltage controlled oscillator, the output end of the power amplifier is connected with the monostable circuit, and the output end of the monostable circuit is connected with the voltage controlled oscillator.
3. The device of claim 1, wherein the current sensor is a zero-flux sensor made of ultra-crystalline material.
4. The wireless current collection sensor device for the electrified lightning arrester detector according to claim 1, wherein a housing of the current sensor is a hard antimagnetic 316L stainless steel housing.
5. The device of claim 1, wherein the current sensor is connected to the signal conditioner via a corrugated tube, and a thermistor wire is used as a connection wire between the current sensor and the signal conditioner.
6. The device of claim 1, wherein the current sensor further comprises a high-frequency current sensor and a fundamental frequency current sensor.
7. The device of claim 1, wherein the current sensor is an open-center current sensor, and the inner diameter of the open-center current sensor is one of 50mm, 80mm and 100 mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221297034.8U CN217587384U (en) | 2022-05-26 | 2022-05-26 | Wireless current acquisition sensor device of lightning arrester live detector |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221297034.8U CN217587384U (en) | 2022-05-26 | 2022-05-26 | Wireless current acquisition sensor device of lightning arrester live detector |
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| CN217587384U true CN217587384U (en) | 2022-10-14 |
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| CN202221297034.8U Active CN217587384U (en) | 2022-05-26 | 2022-05-26 | Wireless current acquisition sensor device of lightning arrester live detector |
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- 2022-05-26 CN CN202221297034.8U patent/CN217587384U/en active Active
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