CN115508614B - Airborne non-contact type high-voltage electricity testing method and system - Google Patents
Airborne non-contact type high-voltage electricity testing method and system Download PDFInfo
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- CN115508614B CN115508614B CN202211459659.4A CN202211459659A CN115508614B CN 115508614 B CN115508614 B CN 115508614B CN 202211459659 A CN202211459659 A CN 202211459659A CN 115508614 B CN115508614 B CN 115508614B
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Abstract
The invention discloses an airborne non-contact high-voltage electricity testing method and system. The method comprises the following steps: the electric field distribution of the line to be tested is measured through an electric field acquisition device mounted on the unmanned aerial vehicle by the electricity test system, and an electric field distribution curve of the line to be tested is determined and transmitted to an electric field output device of the electricity test system; the electric field acquisition device determines the spatial electric field change characteristics of the line to be tested according to the acquired electric field distribution curve of the line to be tested and transmits the spatial electric field change characteristics to the electric field output device for display; the electric field acquisition device compares the spatial electric field change characteristics with a pre-experimental electricity test criterion to determine an electricity test result of the circuit to be tested, and transmits the electricity test result to the electric field output device for display.
Description
Technical Field
The invention relates to the technical field of high-voltage electricity testing, in particular to an airborne non-contact high-voltage electricity testing method and system.
Background
The electroscope is a special power detection device for detecting whether a high-voltage transmission line and other high-voltage power devices are electrified. After the power failure of the line or equipment is required in the electric power safety working regulations, an electroscope is required to be used for electroscope to examine the corresponding position of the overhauled line or equipment. Electricity verification is a measure for ensuring the safety of operators. With the rapid development of the power industry, the demand of high-voltage electroscope is increasing.
At present, a 500kV and above ultra-high voltage circuit adopts a contact type electricity inspection mode, and has the characteristics of high tower height, large tower head size, long insulator string, high operation parameters, large phase-ground distance and the like, and the required insulating operating rod has a longer length, so that on one hand, the weight of the operating rod is large, and the labor intensity of operators can be greatly increased; on the other hand, the longer insulating operating rod is easy to flex and inconvenient to operate. Because the line can not reach the operators in the areas such as rivers, valleys and the like or the heights of towers and lines are lifted, the contact electroscope can not be normally used.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an airborne non-contact type high-voltage electricity testing method and system.
According to one aspect of the present invention, there is provided an on-board non-contact high voltage electroscope method comprising:
the electric field distribution of the line to be tested is measured through an electric field acquisition device mounted on the unmanned aerial vehicle by the electricity test system, and an electric field distribution curve of the line to be tested is determined and transmitted to an electric field output device of the electricity test system;
the electric field acquisition device determines the spatial electric field change characteristics of the line to be tested according to the acquired electric field distribution curve of the line to be tested and transmits the spatial electric field change characteristics to the electric field output device for display;
the electric field acquisition device compares the spatial electric field change characteristics with a pre-experimental electricity test criterion to determine an electricity test result of the circuit to be tested, and transmits the electricity test result to the electric field output device for display.
Optionally, the operation of measuring the electric field distribution of the line to be tested by the electric field collection device mounted on the unmanned aerial vehicle through the electricity inspection system and determining the electric field distribution curve of the line to be tested includes:
and flying the unmanned aerial vehicle to a nearby line to be tested at a ground fixed point according to a preset obstacle avoidance distance, and acquiring an electric field distribution curve.
Optionally, the operation of determining the spatial electric field change characteristic of the line to be tested by the electric field collection device according to the collected electric field distribution curve of the line to be tested includes:
and the electric field acquisition device calculates the space electric field average value and the maximum electric field fluctuation rate of the line to be measured according to the electric field distribution curve.
Optionally, the operation of calculating the maximum electric field fluctuation rate of the line to be tested by the electric field collection device according to the electric field distribution curve includes:
the electric field acquisition device acquires the maximum value and the minimum value of the space electric field of the line to be tested according to the electric field distribution curve;
the electric field acquisition device determines a space position according to the maximum value and the minimum value of the space electric field, and carries out spline interpolation through the space position to determine the maximum fluctuation rate of the electric field.
Optionally, the method further comprises: the electricity testing criterion is obtained through the following steps:
acquiring a space electric field average maximum value, a space electric field average minimum value and a space electric field average fluctuation rate of a preset number of electrified lines through an electric field acquisition device;
according to the background electric field value measurement of the preset times by the electric field acquisition device, determining the background electric field value acquired by the electric field acquisition device;
and determining an electricity testing criterion according to the average maximum value, the average minimum value, the average fluctuation rate and the background electric field value of the space electric field.
Optionally, the operation of comparing the electric field collection device with a pre-experimental electricity test criterion according to the spatial electric field change characteristic to determine the electricity test result of the line to be tested includes:
under the condition that E_avr > =E_max/2, the electric field acquisition device judges that the line to be tested is electrified;
in the case where erate_max > erate_avr, and e_avr > =e_max/3, the electric field collecting device determines that the line to be measured is charged;
under the condition of E_avr= (E_min+E_zero)/2, the electric field acquisition device judges that the line to be tested has been powered off;
in the case where E_avr < E_max/3 and E_avr > (E_min+E_zero)/2, the electric field collecting device determines that the line under test has been powered off,
wherein e_avr is the average value of the space electric field of the line to be tested, erate_max is the maximum fluctuation rate of the electric field of the line to be tested, e_max is the average maximum value of the space electric field, e_min is the average minimum value of the space electric field, erate_avr is the average fluctuation rate of the space electric field, and e_zero is the value of the background electric field.
According to another aspect of the present invention, there is provided an on-board non-contact high voltage electroscope system comprising: electric field acquisition device and electric field output device, wherein
The electric field acquisition device is arranged on the unmanned aerial vehicle and comprises a voltage divider, a low-pass filter module, an absolute value circuit, a first MCU processor and a first wireless communication module, wherein
The voltage divider is used for realizing acquisition of a space electric field of a line to be tested, filtering high-frequency interference except a power frequency signal through the low-pass filtering module, converting the high-frequency interference into a positive voltage signal which can be subjected to A/D sampling through the absolute value circuit, calculating an effective value in the first MCU processor to obtain an electric field distribution curve of an electric field intensity value, and carrying out data transmission with the electric field output module through the first wireless communication module;
the electric field output device is a handheld device and consists of a display screen, a key circuit, a second MCU processor and a second wireless communication module, wherein,
the second wireless communication module and the first wireless communication module perform wireless data transmission, the display screen and the key circuit realize the interactive operation of a human-computer interface of the electric field output device, the electric field distribution curve and the electricity testing result information are displayed on the display screen, and the second MCU processor is used for storing the electricity testing history record information.
Optionally, the electric field collection device further includes: the first power supply module supplies power for the electric field acquisition device through a lithium battery.
Optionally, the electric field output device further includes: and the second power supply module is used for supplying power to the electric field output device.
Optionally, the electric field output device further includes: and the real-time clock circuit is used for recording event time.
Therefore, the invention provides an airborne non-contact high-voltage electricity testing method, wherein an acquisition end of an electroscope is mounted on a multi-rotor unmanned aerial vehicle, so that the unmanned aerial vehicle flies close to a lead, the change characteristics of a space electric field near a line to be tested are detected, whether the line is electrified or not, whether induced electricity exists in a power failure or not is judged, and the accuracy is high; the circuit section for electricity test can be flexibly selected, and is not influenced by the terrain and the height of the circuit; the higher the voltage level is, the more obvious the advantages are, and the difficulty and the workload of electricity inspection operation can be greatly reduced. The defects that the contact electroscope is not applied to a high-voltage-class line and cannot be used by special terrains are overcome, and meanwhile, the defects of the electroscope principle of an electric field type non-contact electroscope in the current market and the defects that the arrangement is limited by a distance measuring sensor are overcome.
Drawings
Exemplary embodiments of the present invention may be more completely understood in consideration of the following drawings:
FIG. 1 is a schematic flow chart of an on-board non-contact high voltage electroscopic method according to an exemplary embodiment of the present invention;
fig. 2 is a schematic structural diagram of an on-board non-contact high-voltage electroscope system according to an exemplary embodiment of the present invention;
fig. 3 is a schematic structural diagram of an electric field collecting device according to an exemplary embodiment of the present invention;
fig. 4 is a schematic structural diagram of an electric field output device according to an exemplary embodiment of the present invention.
Detailed Description
It should be noted that, without conflict, the embodiments of the present disclosure and features of the embodiments may be combined with each other. The present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
In order that those skilled in the art will better understand the present disclosure, a technical solution in the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present disclosure, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without inventive effort, based on the embodiments in this disclosure, shall fall within the scope of the present disclosure.
It should be noted that the terms "first," "second," and the like in the description and claims of the present disclosure and in the foregoing figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the disclosure described herein are, for example, capable of operation in connection with other embodiments. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
Exemplary method
Fig. 1 is a schematic flow chart of an airborne noncontact high-voltage electricity testing method according to an exemplary embodiment of the present invention. The embodiment can be applied to an electronic device, as shown in fig. 1, the on-board non-contact high-voltage electroscopic method 100 includes the following steps:
102, determining the spatial electric field change characteristics of the line to be tested according to the acquired electric field distribution curve of the line to be tested by the electric field acquisition device, and transmitting the spatial electric field change characteristics to the electric field output device for display;
and step 103, the electric field acquisition device compares the space electric field change characteristics with a pre-experimental electricity test criterion to determine an electricity test result of the circuit to be tested, and transmits the electricity test result to the electric field output device for display.
The data sets acquired by the electric field acquisition device are stored in the self storage module, and the same data sets are transmitted to the electric field output device in a wireless mode, so that the electric field acquisition device and the electric field output device in the electricity test system can perform electricity test judgment to obtain an electricity test result. The electric field output device realizes real-time display of the space electric field change characteristics and the electricity inspection results of the circuit to be tested. Therefore, under the condition of poor wireless communication condition or data packet loss in wireless communication, if the electric field output device cannot give an electricity test result, the electric field acquisition device can independently test electricity and judge and test electricity result indication.
The method comprises the steps of detecting the change characteristics of the space electric field near a line to be detected to carry out electricity testing judgment, and not only the electric field value of a certain point in space, more sample points and space electric field characteristic information in the measuring area range are contained.
Optionally, the operation of measuring the electric field distribution of the line to be tested by the electric field collection device mounted on the unmanned aerial vehicle through the electricity inspection system and determining the electric field distribution curve of the line to be tested includes:
and flying the unmanned aerial vehicle to a nearby line to be tested at a ground fixed point according to a preset obstacle avoidance distance, and acquiring an electric field distribution curve.
Optionally, the operation of determining the spatial electric field change characteristic of the line to be tested by the electric field collection device according to the collected electric field distribution curve of the line to be tested includes:
and the electric field acquisition device calculates the space electric field average value and the maximum electric field fluctuation rate of the line to be measured according to the electric field distribution curve.
Optionally, the operation of calculating the maximum electric field fluctuation rate of the line to be tested by the electric field collection device according to the electric field distribution curve includes:
the electric field acquisition device acquires the maximum value and the minimum value of the space electric field of the line to be tested according to the electric field distribution curve;
the electric field acquisition device determines a space position according to the maximum value and the minimum value of the space electric field, and carries out spline interpolation through the space position to determine the maximum fluctuation rate of the electric field.
Optionally, the method further comprises: the electricity testing criterion is obtained through the following steps:
acquiring a space electric field average maximum value, a space electric field average minimum value and a space electric field average fluctuation rate of a preset number of electrified lines through an electric field acquisition device;
according to the background electric field value measurement of the preset times by the electric field acquisition device, determining the background electric field value acquired by the electric field acquisition device;
and determining an electricity testing criterion according to the average maximum value, the average minimum value, the average fluctuation rate and the background electric field value of the space electric field.
Optionally, the operation of comparing the electric field collection device with a pre-experimental electricity test criterion according to the spatial electric field change characteristic to determine the electricity test result of the line to be tested includes:
under the condition that E_avr > =E_max/2, the electric field acquisition device judges that the line to be tested is electrified;
in the case where erate_max > erate_avr, and e_avr > =e_max/3, the electric field collecting device determines that the line to be measured is charged;
under the condition of E_avr= (E_min+E_zero)/2, the electric field acquisition device judges that the line to be tested has been powered off;
in the case where E_avr < E_max/3 and E_avr > (E_min+E_zero)/2, the electric field collecting device determines that the line under test has been powered off,
wherein e_avr is the average value of the space electric field of the line to be tested, erate_max is the maximum fluctuation rate of the electric field of the line to be tested, e_max is the average maximum value of the space electric field, e_min is the average minimum value of the space electric field, erate_avr is the average fluctuation rate of the space electric field, and e_zero is the value of the background electric field.
The method comprises the steps of analyzing the relationship between the electric field intensity of the peripheral space of the line and the distance of the line under the simple working condition of the alternating-current overhead transmission line:
working condition (1): when the line is in power failure, the electric field intensity of the space around the wire is basically zero.
Working condition (2): when the line is electrified, the electric field intensity of the peripheral space of the wire and the distance from the wire are in an inverse trend relation: the closer to the wire, the greater the spatial electric field strength; the farther from the wire, the smaller the spatial electric field strength.
In the space range of 30 meters to 5 meters from the lead, the lines are electrified and not electrified, and the magnitude relation of the intensity values of the space electric field is hundreds of times, hundreds of times or even thousands of times according to the different voltage grades of the lines. Generally speaking, the spatial electric field intensity values are at least hundreds of times different in the working condition that the line is electrified and not electrified in a spatial range which is close to the lead. Meanwhile, when the line is electrified, the electric field intensity is very high in a space range which is close to the lead; when the line is in power failure, the electric field intensity value is basically zero in the space range which is nearer to the lead, and the electric field between the two is changed according to specific characteristics according to different working environments. By utilizing the distinction of the specific characteristics, whether the line is normally electrified or powered off can be accurately judged by measuring the spatial electric field distribution near the line.
Specifically, in a spatial range close to a wire, the power of the circuit is cut off and the circuit is electrified, the distribution of the spatial electric field intensity can only be the working condition (1) or the working condition (2) in the electricity testing principle, and the electric field distribution curves of the working condition (1) and the working condition (2) are not intersected, but are further away; the working condition (1) and the working condition (2) can be accurately distinguished through the distance and the fluctuation rate of the electric field.
Judging whether the wire is electrified or not, and judging whether the wires are electrified or not according to the spatial electric field change characteristics near the electrified wires which are repeatedly measured and the background value of the environment without the surrounding electric field which is repeatedly measured, wherein an electricity test criterion is obtained, and the electricity test method comprises the following steps:
1. acquiring a preset number of space electric field average maximum value E_max, space electric field average minimum value E_min and space electric field average fluctuation rate ERate_avr of the electrified lines: through an unmanned aerial vehicle with an autonomous obstacle avoidance function, an electric field acquisition device of a non-contact electroscope is mounted, an adjacent wire flies from a ground fixed point, an obstacle avoidance distance of the unmanned aerial vehicle is set, an electric field intensity distribution curve from the ground to the position of the unmanned aerial vehicle at the obstacle avoidance distance from the wire is obtained, and an electric field average maximum value E_max and an electric field average minimum value E_min are obtained; e_max is subtracted by E_min, and then the space position D is used as spline interpolation to obtain the average fluctuation rate ERate_avr of the space electric field;
2. acquiring a background electric field value E_zero: under the natural environment without a peripheral electric field, the background electric field value measured by the electric field acquisition device of the non-contact electroscope is measured for a plurality of times, and the background value E_zero is obtained by weighting in consideration of differences of different tower shapes, operation positions and the like.
And (3) obtaining an electricity testing criterion through the step 1 and the step 2.
3. The electric field E in the space near the line to be measured is actually measured by an electric field acquisition device and an electric field output device i I is the number of sample points, N is set, and (E_1, E_2, E\u) i .. E_N) are rearranged according to the order from small to large, and the space electric field average value E_avr and the electric field maximum fluctuation rate ERate_max of the line to be tested are obtained through spline interpolation.
The electricity test criteria are as follows:
1. if the actually measured electric field change characteristic E_avr > =E_max/2, the electrification of the circuit to be measured can be judged;
2. if the measured electric field variation characteristic erate_max > erate_avr, and e_avr > =e_max/3, it may be determined that the line under test is charged;
3. if the actually measured electric field variation characteristic e_avr < = (e_min+e_zero)/2, it can be determined that the line to be measured has been powered off.
If neither condition (1) nor condition (2) is described, there are 2 possibilities:
working condition (3): the circuit has been powered off, but has very large induced electricity;
working condition (4): the line is electrified, and in the electricity inspection process, the distance between the acquisition end of the electroscope and the line is too far.
Under the condition, the power is required to be re-tested, the working condition (4) caused by manual operation is eliminated, when the power is re-tested, if the unmanned aerial vehicle and the line are in a relatively close range, and the power testing result is not the working condition (1) or the working condition (2), the power failure of the line can be judged, the induced electricity exists, and the criterion is as follows:
the measured electric field variation characteristics E_avr < E_max/3, and E_avr > (E_min+E_zero)/2
It can be determined that the circuit to be tested has been powered off and has induced electricity.
In addition, the second MCU processor can store historical record data, the function can check time and electricity test curves of the historical data, the historical electricity test results can be traced, and work management is convenient.
Therefore, the invention provides an airborne non-contact high-voltage electricity testing method, wherein an acquisition end of an electroscope is mounted on a multi-rotor unmanned aerial vehicle, so that the unmanned aerial vehicle flies close to a lead, the change characteristics of a space electric field near a line to be tested are detected, whether the line is electrified or not, whether induced electricity exists in a power failure or not is judged, and the accuracy is high; the circuit section for electricity test can be flexibly selected, and is not influenced by the terrain and the height of the circuit; the higher the voltage level is, the more obvious the advantages are, and the difficulty and the workload of electricity inspection operation can be greatly reduced. The defects that the contact electroscope is not applied to a high-voltage-class line and cannot be used by special terrains are overcome, and meanwhile, the defects of the electroscope principle of an electric field type non-contact electroscope in the current market and the defects that the arrangement is limited by a distance measuring sensor are overcome.
In addition, the airborne non-contact type high-voltage electricity testing method provided by the invention adopts the multi-rotor unmanned aerial vehicle for mounting, is convenient to mount and dismount, can complete electricity testing judgment in less than one minute after an electricity testing program is started, has accurate and reliable electricity testing result, has more obvious advantages when the voltage level is higher, and can completely replace a contact type electroscope of a high-voltage transmission line of 110kV or above.
Exemplary apparatus
Fig. 2 is a schematic structural diagram of an on-board non-contact high-voltage electroscope system according to an exemplary embodiment of the present invention. As shown in fig. 2, 3 and 4, the apparatus 200 includes: electric field acquisition device and electric field output device, wherein
The electric field acquisition device is arranged on the unmanned aerial vehicle and comprises a voltage divider, a low-pass filter module, an absolute value circuit, a first MCU processor and a first wireless communication module, wherein
The voltage divider is used for realizing acquisition of a space electric field of a line to be tested, filtering high-frequency interference except a power frequency signal through the low-pass filtering module, converting the high-frequency interference into a positive voltage signal which can be subjected to A/D sampling through the absolute value circuit, calculating an effective value in the first MCU processor to obtain an electric field distribution curve of an electric field intensity value, and carrying out data transmission with the electric field output module through the first wireless communication module;
the electric field output device is a handheld device and consists of a display screen, a key circuit, a second MCU processor and a second wireless communication module, wherein,
the second wireless communication module and the first wireless communication module perform wireless data transmission, the display screen and the key circuit realize the interactive operation of a human-computer interface of the electric field output device, the electric field distribution curve and the electricity testing result information are displayed on the display screen, and the second MCU processor is used for storing the electricity testing history record information.
Optionally, the electric field collection device further includes: the first power supply module supplies power for the electric field acquisition device through a lithium battery.
Optionally, the electric field output device further includes: and the second power supply module is used for supplying power to the electric field output device.
Optionally, the electric field output device further includes: and the real-time clock circuit is used for recording event time.
Specifically, as shown in fig. 3, the block diagram of the electric field collection device is that the collection end is powered by a lithium battery of the first power module, and the hardware circuit is composed of a voltage divider, a low-pass filtering module, an absolute value circuit, a first MCU processor, a first wireless communication module and the first power module.
The voltage divider is used for realizing the acquisition of a space electric field, filtering high-frequency interference except a power frequency signal through the low-pass filtering module, converting the high-frequency interference into a positive voltage signal which can be subjected to A/D sampling through the absolute value circuit, and obtaining an electric field intensity value after the effective value calculation in the first MCU processor. The first wireless communication module and the electric field output device perform wireless data transmission, respond to the instruction sent by the electric field output device, and continuously send the space electric field value to the ground handheld terminal.
Specifically, the electric field output device is a handheld end block diagram, as shown in fig. 4, and is powered by a second power module battery, and the hardware circuit is composed of a display screen, a key circuit, a second MCU processor, a real-time clock circuit, a second wireless communication module and a second power module.
The real-time clock circuit records event time, the second wireless communication module and the electric field acquisition device perform wireless data transmission, the display screen and the keys realize man-machine interface interaction operation of the electric field output device, and the electric field distribution curve and the electricity testing result information are displayed on the display screen.
All the historical electricity test records of the electric field output device are stored in the second MCU processing internal storage unit, and 50 pieces of historical data with the distance of not less than 50 can be checked, and each piece of data comprises time information and electricity test curve information.
The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present disclosure unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
In the description of the present disclosure, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present disclosure and to simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be configured and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present disclosure; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.
The foregoing is merely a preferred embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the technical scope of the present application should be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (8)
1. An airborne non-contact high-voltage electricity testing method is characterized by comprising the following steps of:
the electric field distribution of a line to be tested is measured through an electric field acquisition device mounted on the unmanned aerial vehicle through an electricity testing system, and an electric field distribution curve of the line to be tested is determined and transmitted to an electric field output device of the electricity testing system;
the electric field acquisition device calculates a space electric field average value and an electric field maximum fluctuation rate of the line to be tested according to the electric field distribution curve, and transmits the space electric field average value and the electric field maximum fluctuation rate to the electric field output device for display;
the electric field acquisition device compares the space electric field average value and the electric field maximum fluctuation rate with a pre-experimental electricity test criterion to determine an electricity test result of the circuit to be tested, and transmits the electricity test result to the electric field output device for display, wherein the electricity test result is displayed by the electric field output device
The electric field acquisition device compares the electric field average value and the electric field maximum fluctuation rate with a pre-experimental electricity test criterion to determine the electricity test result of the circuit to be tested, and the operation comprises the following steps:
in the case of e_avr > =e_max/2, the electric field collecting device determines that the line to be tested is charged;
in the case where erate_max > erate_avr, and e_avr > =e_max/3, the electric field collecting means determines that the line under test is charged;
under the condition of E_avr < = (E_min+E_zero)/2, the electric field acquisition device judges that the line to be tested has been powered off;
in the case where E_avr < E_max/3, and E_avr > (E_min+E_zero)/2, the electric field collecting means determines that the line under test has been powered off, but there is induced electricity,
wherein e_avr is the average value of the space electric field of the line to be tested, erate_max is the maximum fluctuation rate of the electric field of the line to be tested, e_max is the average maximum value of the space electric field, e_min is the average minimum value of the space electric field, erate_avr is the average fluctuation rate of the space electric field, and e_zero is the value of the background electric field.
2. The method of claim 1, wherein the operation of measuring the electric field distribution of the line under test by the electric field collection device of the unmanned aerial vehicle, and determining the electric field distribution curve of the line under test, comprises:
and flying the unmanned aerial vehicle at a ground fixed point to the vicinity of the line to be detected according to a preset obstacle avoidance distance, and acquiring the electric field distribution curve.
3. The method of claim 1, wherein the operation of the electric field acquisition device to calculate the maximum electric field fluctuation rate of the line under test based on the electric field distribution curve comprises:
the electric field acquisition device acquires the maximum value and the minimum value of the space electric field of the line to be detected according to the electric field distribution curve;
and the electric field acquisition device determines a space position according to the maximum value and the minimum value of the space electric field, and carries out spline interpolation through the space position to determine the maximum fluctuation rate of the electric field.
4. The method as recited in claim 1, further comprising: the electricity testing criterion is obtained through the following steps:
acquiring a space electric field average maximum value, a space electric field average minimum value and a space electric field average fluctuation rate of a preset number of electrified lines through the electric field acquisition device;
according to the electric field acquisition device, background electric field value measurement is carried out for a preset number of times, and the background electric field value acquired by the electric field acquisition device is determined;
and determining the electricity testing criterion according to the average maximum value of the space electric field, the average minimum value of the space electric field, the average fluctuation rate of the space electric field and the background electric field value.
5. An on-board non-contact high voltage electroscopic system for implementing the on-board non-contact high voltage electroscopic method according to any of the preceding claims 1-4 and comprising: electric field acquisition device and electric field output device, wherein
The electric field acquisition device is mounted on the unmanned aerial vehicle and consists of a voltage divider, a low-pass filtering module, an absolute value circuit, a first MCU processor and a first wireless communication module, wherein
The voltage divider is used for realizing acquisition of a space electric field of a line to be detected, filtering high-frequency interference except a power frequency signal through the low-pass filtering module, converting the high-frequency interference into a positive voltage signal which can be subjected to A/D sampling through the absolute value circuit, calculating an effective value in the first MCU processor to obtain an electric field distribution curve of an electric field intensity value, and the first wireless communication module is used for carrying out data transmission with the electric field output device;
the electric field output device is a handheld device and consists of a display screen, a key circuit, a second MCU processor and a second wireless communication module, wherein,
the second wireless communication module and the first wireless communication module perform wireless data transmission, the display screen and the key circuit realize interactive operation of a human-computer interface of the electric field output device, an electric field distribution curve and electricity testing result information are displayed on the display screen, and the second MCU processor is used for storing electricity testing history record information.
6. The system of claim 5, wherein the electric field acquisition device further comprises: and the first power supply module supplies power to the electric field acquisition device through a lithium battery.
7. The system of claim 5, wherein the electric field output device further comprises: and the second power supply module is used for supplying power to the electric field output device.
8. The system of claim 5, wherein the electric field output device further comprises: and the real-time clock circuit is used for recording event time.
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| CN104181377A (en) * | 2014-08-27 | 2014-12-03 | 李明明 | High-voltage ultra-small unmanned electroscope |
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