CN111722017A - Transformer substation's ground net ground impedance range finding location communication auxiliary system - Google Patents
Transformer substation's ground net ground impedance range finding location communication auxiliary system Download PDFInfo
- Publication number
- CN111722017A CN111722017A CN202010472276.5A CN202010472276A CN111722017A CN 111722017 A CN111722017 A CN 111722017A CN 202010472276 A CN202010472276 A CN 202010472276A CN 111722017 A CN111722017 A CN 111722017A
- Authority
- CN
- China
- Prior art keywords
- handheld
- module
- extension
- host
- positioning
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004891 communication Methods 0.000 title claims abstract description 68
- 238000012360 testing method Methods 0.000 claims abstract description 29
- 238000005259 measurement Methods 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims description 18
- 238000013500 data storage Methods 0.000 claims description 15
- 230000005540 biological transmission Effects 0.000 claims description 13
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 6
- 229910052744 lithium Inorganic materials 0.000 claims description 6
- 238000003860 storage Methods 0.000 claims description 4
- 230000002457 bidirectional effect Effects 0.000 claims description 3
- DMBHHRLKUKUOEG-UHFFFAOYSA-N diphenylamine Chemical compound C=1C=CC=CC=1NC1=CC=CC=C1 DMBHHRLKUKUOEG-UHFFFAOYSA-N 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 7
- 238000001514 detection method Methods 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 238000013461 design Methods 0.000 description 3
- 230000007935 neutral effect Effects 0.000 description 3
- 238000009826 distribution Methods 0.000 description 2
- 238000007726 management method Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000013208 measuring procedure Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000011895 specific detection Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/20—Measuring earth resistance; Measuring contact resistance, e.g. of earth connections, e.g. plates
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/38—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system
- G01S19/39—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system the satellite radio beacon positioning system transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/42—Determining position
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
Abstract
The invention discloses a distance measurement and positioning communication auxiliary system for grounding impedance of a transformer substation grounding grid, which comprises a handheld host, a first handheld extension and a second handheld extension, wherein the first handheld extension is connected with the handheld host; the handheld host, the first handheld extension and the second handheld extension are provided with a Beidou positioning system. The invention solves the problems of labor and force consumption and measurement error in positioning each electrode during the grounding impedance test of the grounding grid. The distance of the diagonal line of the transformer substation can be accurately obtained through the Beidou positioning system, and the distance measurement error when the impedance is measured is reduced; the Beidou positioning modules are used for positioning in real time and communicating with each other, so that tripolar positions can be kept on the same straight line, and the deviation error of a route is reduced; the farthest current pole is convenient to position, the position of the farthest current pole is 4-5 times of the distance of a diagonal line of the transformer substation, the distance is also determined by the Beidou positioning module, and numerical errors of the paying-off distance are reduced; the golden section point voltage pole is also positioned through the Beidou positioning module, and the positioning error of the golden section point is reduced.
Description
Technical Field
The invention relates to a distance measurement, positioning and communication auxiliary system for grounding impedance of a transformer substation grounding grid, in particular to an auxiliary system for distance measurement, positioning and communication during testing of grounding impedance of a transformer substation grounding grid with a voltage level of 35kV or above.
Background
The earthing net is an important part of the electric network, and is a large-scale horizontal netted earthing device which is composed of vertical and horizontal earthing poles and has the functions of current discharge and voltage sharing and is used for power plants and substations. The national standard "grounding design Specification for AC electric devices" GB/T50065-2011 stipulates that a grounding grid of a power plant and a transformer substation should be laid with an artificial grounding grid mainly based on horizontal grounding besides a natural grounding electrode. The grounding grid provides working grounding, protective grounding and lightning protection grounding for primary and secondary power equipment in the transformer substation. In other words, the power equipment in the station is required to be reliably connected with the grounding grid to obtain a reference potential, such as a neutral point of a transformer, a shielding layer of a power cable, the secondary metering of a current transformer, the tail end of a measuring winding and the like, and the power equipment cannot normally work if not reliably connected with the grounding grid; and secondly, the shell and the framework of the power equipment in the transformer substation are both reliably connected with a grounding grid, so as to protect the personal safety of the transformer substation during operation and maintenance and operation or maintenance of maintainers. And thirdly, the grounding grid provides a 'leakage channel' for the fault current or the lightning strike current of the power system so as to protect the personal safety of power equipment and workers in the station. The large-scale substation grounding grid is generally a large-scale closed-loop net structure formed by welding steel bars or other metals, the deep burying of the grounding grid is generally controlled to be 0.6-0.8 m, and the area of the grounding grid is about equal to that of a substation ground surface building.
The physical significance of the characterization lies in the difference between the deeply-buried closed-loop artificial grounding network structure and the real earth zero potential at infinite distance, in other words, the smaller the value of the grounding resistance is, the closer the grounding network is to the earth zero potential. The ground impedance is either out of tolerance or too harmful: if the grounding resistance is too large, when a grounding fault occurs, the voltage deviation of a neutral point is increased, and the voltage of a healthy phase and the voltage of the neutral point are possibly too high and exceed the level required by insulation, so that equipment is damaged; when lightning or lightning wave attacks, high residual voltage can be generated by large current, nearby equipment can be counterstruck, the lightning resistance level of equipment protected by a grounding grid is reduced, and the personal safety of transformer substation operators and transformer substation maintenance personnel can be threatened.
The detection methods of the grounding impedance of the transformer substation include a three-pole method and a four-pole method, wherein the three-pole method refers to a current pole, a voltage pole and an in-station pole/test pole. The three-pole method measurement is divided into a straight line method and an angle method, wherein the three-pole straight line method is the most widely applied method by the operation and maintenance management unit of the equipment at all levels at present.
The existing measuring method is labor-consuming and labor-consuming in wiring and has large errors:
1. the distance of the diagonal line of the transformer substation cannot be accurately known: the size of the occupied area of each voltage class transformer substation is different, even the size of the transformer substations with the same voltage class is different. The equipment operation and maintenance management is difficult to acquire the design information of the transformer substation from a design department, so that the grounding impedance is usually estimated by eye distance measurement when being measured, so that great errors exist, the estimated distances are different in each measurement, and an error a is introduced;
2. the testing electrode is in the station, the current electrode and the voltage electrode are arranged outside the station, three poles are separated by a transformer substation enclosure, meanwhile, rivers, lakes, roads, metal pipelines, power transmission lines and the like are avoided, the three poles are difficult to keep in the same straight line, and an error b is introduced;
3. the farthest current pole is difficult to locate, the position of the farthest current pole is 4-5 times of the diagonal distance of the transformer substation, the distance also needs to be estimated by a tester, and an error c is introduced;
4. the voltage pole of the golden section point is also positioned by estimation, and an error d is introduced;
5. the test result needs to be compared with the last test data to judge whether the earth screen has corrosion, fracture and other changes within the detection period of 6 years. The tester can be arranged in different directions when standing at the gate of the transformer substation, and the direction and the position of the grounding impedance distribution electrode of the same transformer substation are measured at different times, so that the measurement result has no reference.
6. Because the tester who arranges the current pole and voltage pole outside the station needs to walk out far distance, the unsmooth problem of communication is comparatively outstanding. Most transformer substations are located in suburbs of mountainous areas, and communication and network signals are poor.
Disclosure of Invention
The invention aims to solve the technical problem of providing a distance measurement and positioning communication auxiliary system for the grounding impedance of a transformer substation grounding grid,
the problems that positioning of each electrode is labor-consuming, measuring errors exist, test data are lack of front and back contrast, and communication is not smooth in measuring procedures during grounding impedance testing of the grounding grid are solved.
In order to solve the problems, the technical scheme adopted by the invention is as follows:
a distance measurement and positioning communication auxiliary system for grounding impedance of a transformer substation grounding grid comprises a handheld host, a first handheld extension and a second handheld extension;
the handheld host, the first handheld extension and the second handheld extension are provided with a Beidou positioning system.
As a further improvement of the present invention,
the handheld host comprises a central controller module, a Beidou positioning module, a data storage module, a wireless communication module and a digital display module;
the Beidou positioning module measures position data of the handheld host computer, the position data of the handheld host computer is connected to a data input interface of the central controller module through a data line, and the data storage module and the digital display module are respectively connected with a data output interface of the central controller module in a data transmission mode; the wireless communication module is in bidirectional transmission connection with the data interface of the central controller module.
As a further improvement of the present invention,
the handheld host further comprises a power supply module, and an electric energy output end of the power supply module is electrically connected with the central controller module, the Beidou positioning module, the data storage module, the wireless communication module and the digital display module.
As a further improvement of the present invention,
the power supply module is a lithium battery, and a charging interface connected with an electric energy input end of the power supply module is arranged at one side part of the handheld host; and the other side part of the handheld host is fixedly connected with a handheld handle.
As a further improvement of the present invention,
the front side of the handheld host is provided with a digital display screen, a power supply starting button and a power supply closing button;
the digital display screen is electrically connected with the digital display module to digitally display the position data of the handheld host;
the power supply starting button and the power supply closing button are electrically connected with the power supply module to control the on-off of a power supply circuit of the power supply module.
As a further improvement of the present invention,
the first handheld extension set comprises a Beidou positioning module, a remote communication module, a digital display module and a battery module;
the Beidou positioning module measures position data of the first handheld extension set, the Beidou positioning module is respectively connected with the remote communication module and the digital display module in a data transmission mode through data lines, the remote communication module transmits the position data of the first handheld extension set to the wireless communication module, and the wireless communication module transmits the position data of the first handheld extension set to the central controller module;
the electric energy output end of the battery module is electrically connected with the Beidou positioning module, the remote communication module and the digital display module;
the second handheld extension is the same in structure as the first handheld extension.
As a further improvement of the present invention,
the battery module is a lithium battery, and a battery charging interface connected with an electric energy input end of the battery module is arranged at one side part of the first handheld extension; and the other side part of the first handheld extension is fixedly connected with an extension handheld handle.
As a further improvement of the present invention,
the front side of the first handheld extension is provided with a digital display screen, an extension starting button and an extension closing button;
the digital display screen is electrically connected with the digital display module and used for digitally displaying the position data of the first handheld extension set;
the power supply starting button and the power supply closing button are electrically connected with the power supply module to control the on-off of a power supply circuit of the power supply module.
As a further improvement of the present invention,
a voice communication channel is arranged between the remote communication modules of the first handheld extension and the second handheld extension and the wireless communication module of the handheld host;
the central controller module adopts an ATMEGA 168 type single chip microcomputer of ATMEL company;
the remote communication module and the wireless communication module adopt a 4G communicator or a 5G communicator.
As a further improvement of the present invention,
the method for measuring the distance of the grounding impedance of the transformer substation grounding grid by using the auxiliary system comprises the following steps:
step S1, testers holding the handheld host and the two handheld extension sets stand at three corners in the transformer substation respectively, corresponding position data are obtained by the respective Beidou positioning modules of the handheld host and the two handheld extension sets at the moment, the position data of the handheld host and the position data of the two handheld extension sets are transmitted to the central controller module, the accurate diagonal length of the transformer substation is calculated by the central controller module and is stored in the data storage module;
step S2, fixing the handheld host and the first handheld extension in the substation;
step S3, paying off a current pole tester holding the second handheld extension at a proper position outside the station, sending a prompt signal by the handheld host when paying off the current pole tester to 5 times of the distance between the handheld host and the diagonal line of the first handheld extension, and informing the personnel holding the host by the voice of a communication channel between the handheld host and the second handheld extension;
the proper position is a position which avoids rivers, lakes, roads, metal pipelines and power transmission lines and ensures that a current pole and a voltage pole of a second handheld extension outside the station need to keep an included angle of 30 degrees;
step S4, the voltage pole tester holding the first hand-held extension sets a line along the straight line formed by the connection of the positions of the hand-held host and the hand-held second hand-held extension until reaching the position of the golden section point; the data storage module of the handheld host stores the position coordinates of the first handheld extension, the handheld second handheld extension and the handheld host at the moment;
step S5, the impedance measuring instrument measures the impedance of the positions of the first handheld extension, the handheld second handheld extension and the handheld host in the step S4, and the tester manually inputs the result into the handheld host for storage;
step S6, after the first test point in the substation is measured, the fixed positions of the handheld host and the first handheld extension in the substation are changed, the relative positions of the first handheld extension and the handheld second extension are adjusted in sequence to ensure that the first handheld extension and the handheld second extension are on the same straight line, and the steps S2-S5 are repeated;
step S7, after the whole test is finished, the handheld host stores the positions of all the test points and the test results measured at this time; and when measuring in the next period, the tester only needs to route according to the voice navigation provided by the system.
Adopt the produced beneficial effect of above-mentioned technical scheme to lie in:
the invention solves the problems of labor and force consumption for positioning each electrode, measurement error, poor contrast before and after test data and unsmooth communication in measurement procedures during the grounding impedance test of the grounding grid.
Wiring is time-saving and labor-saving when the low impedance is connected for detection, the position is more accurate, the distance of the diagonal line of the transformer substation can be accurately obtained through the Beidou positioning system, and the distance measurement error when the low impedance is connected for measurement is reduced;
the testing electrode is arranged in the station, the current electrode and the voltage electrode are arranged outside the station, and the Beidou positioning module is used for positioning in real time and communicating with each other, so that tripolar positions can be kept on the same straight line, and the deviation error of a route is reduced;
the farthest current pole is convenient to position, the position of the farthest current pole is 4-5 times of the distance of a diagonal line of the transformer substation, the distance is also determined by the Beidou positioning module, and numerical errors of the paying-off distance are reduced;
the voltage pole of the golden section point is also positioned through the Beidou positioning module, so that the positioning error of the golden section point is reduced;
the direction and the position of the grounding impedance electrode distribution of the same transformer substation are measured by a tester each time according to a storage route in the handheld host, and historical measurement results are compared, so that the device has reference property;
the tester who arranges the current pole and voltage pole outside the station needs to walk out far distance, and 4G/5G communication is convenient.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic diagram of a prior art impedance detection principle;
FIG. 2 is an external schematic view of a handheld host;
FIG. 3 is a functional block diagram of a handheld host;
figure 4 is a schematic diagram of the external structure of a first hand-held extension;
figure 5 is a functional block diagram of a first handheld extension;
fig. 6 is a schematic diagram of the external structure of the second handset.
Wherein:
the portable handheld extension comprises a handheld host 1, a first handheld extension 2, a second handheld extension 3, a charging interface 11, a digital display screen 12, a handheld handle 13, a power supply starting button 14, a power supply closing button 15, a battery charging interface 21, a digital display screen 22, a handheld handle with a fan 23, an extension starting button 24 and an extension closing button 25.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
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 according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting.
Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present application, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the case of not making a reverse description, these directional terms do not indicate and imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the scope of the present application; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
The specific detection principle schematic diagram of the ground impedance detection method is shown in fig. 1, wherein G is an intra-station pole, P is a voltage pole, and C is a current pole. D represents the diagonal length of the power transformation grounding grid. During testing, the station inner poles (G) are respectively arranged below and above the grounding down-leads of important primary equipment with different voltage levels in the station, and the station inner poles, taking a 220kV transformer substation as an example, need to be sequentially connected to the grounding down-leads of important equipment such as a 220kV main transformer, a 110kV lightning arrester, a 10kV capacitor bank and the like. When in test, three poles G, C, P are kept on the same straight line, the distance from C pole to G is 4 to 5 times of the diagonal D of the substation, and the P point is the straight line of golden section, in other words, the distance between G and P is 0.618 times of the distance between G and C. During measurement, rivers and lakes are avoided as much as possible, and the crossing of roads is avoided to prevent rolling damage of vehicles to the test line. Meanwhile, the test line should be far away from the underground metal pipeline and the running power transmission line so as to avoid electromagnetic interference. For the measurement of the earth impedance of the earth network, national and industry regulations stipulate to be carried out once every 6 years.
As shown in the figures 2-6 of the drawings,
a distance measurement and positioning communication auxiliary system for grounding impedance of a transformer substation grounding grid comprises a handheld host 1, a first handheld extension 2 and a second handheld extension 3;
handheld host computer 1, first handheld extension 2 and the handheld extension 3 of second have big dipper positioning system.
Further, the handheld host 1 comprises a central controller module, a Beidou positioning module, a data storage module, a wireless communication module and a digital display module;
the Beidou positioning module measures position data of the handheld host 1, the position data of the handheld host 1 is connected to a data input interface of the central controller module through a data line, and the data storage module and the digital display module are respectively connected with a data output interface of the central controller module in a data transmission mode; the wireless communication module is in bidirectional transmission connection with the data interface of the central controller module.
Furthermore, the handheld host further comprises a power supply module, and an electric energy output end of the power supply module is electrically connected with the central controller module, the Beidou positioning module, the data storage module, the wireless communication module and the digital display module.
Further, the power module is a lithium battery, and a charging interface 11 connected with an electric energy input end of the power module is arranged at one side part of the handheld host 1; and a handheld handle 13 is fixedly connected to the other side part of the handheld host 1.
Further, a digital display screen 12, a power supply starting button 14 and a power supply closing button 15 are arranged on the front surface of the handheld host 1;
the digital display screen 12 is electrically connected with the digital display module to digitally display the position data of the handheld host 1;
the power supply starting button 14 and the power supply closing button 15 are electrically connected with the power supply module to control the power supply circuit of the power supply module to be switched on and off.
Further, the first handheld extension 2 comprises a Beidou positioning module, a remote communication module, a digital display module and a battery module;
the Beidou positioning module measures position data of the first handheld extension set 2, the Beidou positioning module is respectively connected with the remote communication module and the digital display module in a data transmission mode through data lines, the remote communication module transmits the position data of the first handheld extension set 2 to the wireless communication module, and the wireless communication module transmits the position data of the first handheld extension set 2 to the central controller module;
the electric energy output end of the battery module is electrically connected with the Beidou positioning module, the remote communication module and the digital display module;
the second handheld extension set 3 has the same configuration as the first handheld extension set 2.
Further, the battery module is a lithium battery, and a battery charging interface 21 connected with an electric energy input end of the battery module is arranged at one side of the first handheld extension 2; an extension hand-held handle 23 is fixedly connected to the other side of the first hand-held extension 2.
Further, the front surface of the first handheld extension 2 is provided with a digital display screen 22, an extension starting button 24 and an extension closing button 25;
the digital display screen 12 is electrically connected with the digital display module to digitally display the position data of the first handheld extension 2;
the power supply starting button 14 and the power supply closing button 15 are electrically connected with the power supply module to control the power supply circuit of the power supply module to be switched on and off.
Furthermore, a voice communication channel is arranged between the remote communication modules of the first handheld extension 2 and the second handheld extension 3 and the wireless communication module of the handheld host 1;
the central controller module adopts an ATMEGA 168 type single chip microcomputer of ATMEL company;
the remote communication module and the wireless communication module adopt a 4G communicator or a 5G communicator.
Further, the method for measuring the distance of the grounding impedance of the transformer substation grounding grid by using the auxiliary system comprises the following steps:
step S1, testers holding the handheld host 1 and the two handheld extension sets stand at three corners in the transformer substation respectively, corresponding position data are obtained by the Beidou positioning modules of the handheld host 1 and the two handheld extension sets at the moment, the position data of the three are transmitted to the central controller module, the accurate diagonal length of the transformer substation is calculated by the central controller module, and the accurate diagonal length is stored in the data storage module;
step S2, fixing the handheld host 1 and the first handheld extension 2 in the substation;
step S3, paying off a current pole tester of the handheld second handheld extension 3 at a proper position outside the station, sending out a prompt signal by the handheld host 1 when paying off the current pole tester to 5 times the distance between the handheld host 1 and the diagonal straight line of the first handheld extension 2, and informing the personnel of the handheld host 1 through the communication channel voice of the handheld host 1 and the second handheld extension 3;
the proper position is a position which avoids rivers, lakes, roads, metal pipelines and power transmission lines and ensures that a current pole and a voltage pole of a second handheld extension outside the station need to keep an included angle of 30 degrees;
step S4, the voltage pole tester holding the first handheld extension 2 by hand pays off the line along the straight line formed by the positions of the handheld host 1 and the handheld second extension 3 until the voltage pole tester reaches the position of the golden section point; the data storage module of the handheld host 1 stores the position coordinates of the first handheld extension 2, the handheld second handheld extension 3 and the handheld host 1 at the moment;
step S5, the impedance measuring instrument measures the impedance of the positions of the first handheld extension 2, the handheld second handheld extension 3 and the handheld host 1 in the step S4, and the tester manually inputs the result into the handheld host 1 for storage;
step S6, after the first test point in the substation is measured, the fixed positions of the handheld host 1 and the first handheld extension 2 in the substation are changed, the relative positions of the first handheld extension 2 and the handheld second handheld extension 3 are adjusted in sequence to ensure that the first handheld extension 2 and the handheld second handheld extension 3 are on the same straight line, and the steps S2-S5 are repeated;
step S7, after the whole test is finished, the handheld host 1 stores the positions of all the test points and the test results measured at this time; and when measuring in the next period, the tester only needs to route according to the voice navigation provided by the system.
Furthermore, the system also provides a data judgment module, gives an alarm function when the test result has abnormality which does not meet the standard, and can produce standard electronic test reports with schematic direction and coordinate diagrams.
The system is suitable for other measuring and measuring methods, particularly a tripolar method angle type measuring method, an angle of 30 degrees needs to be kept between a current electrode and a voltage electrode outside a station, and the system can accurately position and measure the angle.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; it is obvious as a person skilled in the art to combine several aspects of the invention. And such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides a transformer substation's ground net ground connection impedance range finding location communication auxiliary system which characterized in that: comprises a handheld host (1), a first handheld extension (2) and a second handheld extension (3);
handheld host computer (1), first handheld extension (2) and second handheld extension (3) have big dipper positioning system.
2. The transformer substation grounding grid grounding impedance distance measuring, positioning and communication auxiliary system is characterized in that the handheld host (1) comprises a central controller module, a Beidou positioning module, a data storage module, a wireless communication module and a digital display module;
the Beidou positioning module measures position data of the handheld host (1), the position data of the handheld host (1) is connected to a data input interface of the central controller module through a data line, and the data storage module and the digital display module are respectively connected with a data output interface of the central controller module in a data transmission mode; the wireless communication module is in bidirectional transmission connection with the data interface of the central controller module.
3. The substation grounding grid grounding impedance distance measuring, positioning and communication auxiliary system is characterized in that the handheld host further comprises a power supply module, and an electric energy output end of the power supply module is electrically connected with the central controller module, the Beidou positioning module, the data storage module, the wireless communication module and the digital display module.
4. The substation grounding grid ground impedance distance measuring, positioning and communication auxiliary system is characterized in that the power module is a lithium battery, and a charging interface (11) connected with an electric energy input end of the power module is arranged at one side part of the handheld host (1); the other side part of the handheld host (1) is fixedly connected with a handheld handle (13).
5. The substation grounding grid ground impedance distance measuring, positioning and communication auxiliary system is characterized in that a digital display screen (12), a power supply starting button (14) and a power supply closing button (15) are arranged on the front face of the handheld host (1);
the digital display screen (12) is electrically connected with the digital display module to digitally display the position data of the handheld host (1);
and the power supply starting button (14) and the power supply closing button (15) are electrically connected with the power supply module so as to control the on-off of a power supply circuit of the power supply module.
6. The substation grounding grid ground impedance distance measuring, positioning and communication auxiliary system is characterized in that the first handheld extension (2) comprises a Beidou positioning module, a remote communication module, a digital display module and a battery module;
the Beidou positioning module measures position data of the first handheld extension (2), the Beidou positioning module is respectively connected with the remote communication module and the digital display module in a data transmission mode through data lines, the remote communication module transmits the position data of the first handheld extension (2) to the wireless communication module, and the wireless communication module transmits the position data of the first handheld extension (2) to the central controller module;
the electric energy output end of the battery module is electrically connected with the Beidou positioning module, the remote communication module and the digital display module;
the second handheld extension (3) and the first handheld extension (2) have the same structure.
7. The substation grounding grid ground impedance distance measuring, positioning and communication auxiliary system is characterized in that the battery module is a lithium battery, and a battery charging interface (21) connected with an electric energy input end of the battery module is arranged at one side part of the first handheld extension (2); the other side part of the first handheld extension (2) is fixedly connected with an extension handheld handle (23).
8. The substation grounding grid ground impedance distance measuring, positioning and communication auxiliary system is characterized in that a digital display screen (22), an extension starting button (24) and an extension closing button (25) are arranged on the front face of the first handheld extension (2);
the digital display screen (12) is electrically connected with the digital display module to digitally display the position data of the first handheld extension (2);
and the power supply starting button (14) and the power supply closing button (15) are electrically connected with the power supply module so as to control the on-off of a power supply circuit of the power supply module.
9. The substation grounding grid ground impedance distance measuring and positioning communication auxiliary system is characterized in that a voice communication channel is arranged between the remote communication modules of the first handheld extension (2) and the second handheld extension (3) and the wireless communication module of the handheld host (1);
the central controller module adopts an ATMEGA 168 type single chip microcomputer of ATMEL company;
the remote communication module and the wireless communication module adopt a 4G communicator or a 5G communicator.
10. The substation grounding grid grounding impedance distance measurement positioning communication auxiliary system according to claim 9 is characterized in that the method for measuring the distance of the substation grounding grid grounding impedance by using the auxiliary system is as follows:
step S1, testers holding the handheld host (1) and the two handheld extension sets stand at three corners in the transformer substation respectively, corresponding position data are obtained by the respective Beidou positioning modules of the handheld host (1) and the two handheld extension sets at the moment, the position data of the handheld host and the position data of the two handheld extension sets are transmitted to the central controller module, the accurate diagonal length of the transformer substation is calculated through the central controller module, and the accurate diagonal length is stored in the data storage module;
step S2, fixing the handheld host (1) and the first handheld extension (2) in a substation;
s3, paying off a current pole tester holding the second handheld extension (3) at a proper position outside the station, sending a prompt signal by the handheld host (1) when paying off the current pole tester to 5 times of the distance between the diagonal straight lines of the handheld host (1) and the first handheld extension (2), and informing the personnel holding the handheld host (1) through the communication channel voice of the handheld host (1) and the second handheld extension (3);
step S4, paying off a voltage pole tester holding the first handheld extension (2) along a straight line formed by connecting the positions of the handheld host (1) and the handheld second handheld extension (3) until the voltage pole tester reaches the position of a golden section point; the data storage module of the handheld host (1) stores the position coordinates of the first handheld extension (2), the handheld second handheld extension (3) and the handheld host (1) at the moment;
step S5, the impedance measuring instrument measures the impedance of the positions of the first handheld extension (2), the handheld second handheld extension (3) and the handheld host (1) in the step S4, and the tester manually inputs the result into the handheld host (1) for storage;
s6, after the first test point in the substation is measured, the fixed positions of the handheld host (1) and the first handheld extension (2) in the substation are changed, the relative positions of the first handheld extension (2) and the handheld second extension (3) are adjusted in sequence to ensure that the first handheld extension and the handheld second extension are on the same straight line, and the steps S2-S5 are repeated;
step S7, after the whole test is finished, the handheld host (1) stores the positions of all the test points and the test results measured at this time; and when measuring in the next period, the tester only needs to route according to the voice navigation provided by the system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010472276.5A CN111722017A (en) | 2020-05-29 | 2020-05-29 | Transformer substation's ground net ground impedance range finding location communication auxiliary system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010472276.5A CN111722017A (en) | 2020-05-29 | 2020-05-29 | Transformer substation's ground net ground impedance range finding location communication auxiliary system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111722017A true CN111722017A (en) | 2020-09-29 |
Family
ID=72565260
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010472276.5A Pending CN111722017A (en) | 2020-05-29 | 2020-05-29 | Transformer substation's ground net ground impedance range finding location communication auxiliary system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111722017A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112345832A (en) * | 2020-10-09 | 2021-02-09 | 国网山西省电力公司长治供电公司 | Grounding grid grounding resistance test system and method based on GPS |
| CN112698106A (en) * | 2020-12-02 | 2021-04-23 | 国网辽宁省电力有限公司锦州供电公司 | Grounding impedance testing device and method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103529305A (en) * | 2013-10-25 | 2014-01-22 | 国家电网公司 | Ground resistance test auxiliary system of ground grid of power equipment |
| US20140278172A1 (en) * | 2013-03-13 | 2014-09-18 | San Diego Gas & Electric company c/o Sempra Energy | Methods and systems for adaptive distance protection |
| CN104880607A (en) * | 2015-04-30 | 2015-09-02 | 国家电网公司 | GPS automatic positioning detection method and apparatus for grounding resistance |
| CN105954594A (en) * | 2016-06-17 | 2016-09-21 | 重庆大学 | Novel grounding network grounding resistance inverse short-distance measurement method and apparatus |
| CN108459235A (en) * | 2018-05-09 | 2018-08-28 | 国网河南省电力公司电力科学研究院 | A kind of earthing or grounding means performance parameter test path optimization's selection device and method |
| CN109613567A (en) * | 2018-07-24 | 2019-04-12 | 国家电网公司 | A kind of grounding net of transformer substation test electrode position indicator based on Global Satellite Navigation System |
-
2020
- 2020-05-29 CN CN202010472276.5A patent/CN111722017A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140278172A1 (en) * | 2013-03-13 | 2014-09-18 | San Diego Gas & Electric company c/o Sempra Energy | Methods and systems for adaptive distance protection |
| CN103529305A (en) * | 2013-10-25 | 2014-01-22 | 国家电网公司 | Ground resistance test auxiliary system of ground grid of power equipment |
| CN104880607A (en) * | 2015-04-30 | 2015-09-02 | 国家电网公司 | GPS automatic positioning detection method and apparatus for grounding resistance |
| CN105954594A (en) * | 2016-06-17 | 2016-09-21 | 重庆大学 | Novel grounding network grounding resistance inverse short-distance measurement method and apparatus |
| CN108459235A (en) * | 2018-05-09 | 2018-08-28 | 国网河南省电力公司电力科学研究院 | A kind of earthing or grounding means performance parameter test path optimization's selection device and method |
| CN109613567A (en) * | 2018-07-24 | 2019-04-12 | 国家电网公司 | A kind of grounding net of transformer substation test electrode position indicator based on Global Satellite Navigation System |
Non-Patent Citations (2)
| Title |
|---|
| 庞燕，王忠伟: "《普通高等学校物流类学科专业创新人才培养模式的研究与实践》", 31 May 2011 * |
| 陈化钢: "《电气设备预防性试验方法》", 30 September 1994 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112345832A (en) * | 2020-10-09 | 2021-02-09 | 国网山西省电力公司长治供电公司 | Grounding grid grounding resistance test system and method based on GPS |
| CN112698106A (en) * | 2020-12-02 | 2021-04-23 | 国网辽宁省电力有限公司锦州供电公司 | Grounding impedance testing device and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102221644B (en) | System and method for online monitoring grounding networks of power stations and substations | |
| JP5695889B2 (en) | How to measure the earth ground resistance of a steel tower using a single clamp | |
| CN103217584B (en) | The measuring method of large-scale grounding network impedance ground | |
| CN107037256B (en) | Grounding detection device | |
| CN103616582A (en) | Multidimensional evaluation method for large-scale grounding grid | |
| CN111722017A (en) | Transformer substation's ground net ground impedance range finding location communication auxiliary system | |
| CN106935358B (en) | A kind of transformer demagnetization and verifying device | |
| CN106597213A (en) | Distributed power transmission and distribution line maintenance operation safety protection digital monitoring system | |
| CN107132455B (en) | A kind of grounding net of transformer substation performance estimating method based on ground line current injection | |
| CN104880607A (en) | GPS automatic positioning detection method and apparatus for grounding resistance | |
| CN205248761U (en) | Single core cable cross -bonding case | |
| CN106096161A (en) | Power transmission line power frequency induced voltage and the emulated computation method of electric current | |
| CN105277773A (en) | Method for completely calculating grounding short-circuit current of transformation station | |
| CN103995171B (en) | Contactless DC power transmission line current measuring method | |
| CN105044505A (en) | Grounding grid DC shunt coefficient measuring method based on high-power DC power supply | |
| CN110958561A (en) | Scene recorder in-place supervision method suitable for electric power operation site | |
| CN111812407B (en) | Comprehensive grounding impedance measurement method, system and medium | |
| CN203159712U (en) | Substation grounding grid anti-corrosion and monitoring device based on modular design | |
| CN104914314A (en) | Circuit layout and error correction system used for measuring grounding impedance | |
| CN112395788A (en) | Personal safety accurate evaluation method for distribution network neutral point grounding type reconstruction | |
| CN107765066A (en) | A kind of long-rod type clamp ammeter and its circuit analysis method | |
| CN107478967A (en) | Towards the 10KV cable local discharges on-line monitoring system and method for mobile fortune inspection | |
| CN107525972A (en) | A kind of method that shock-testing is carried out using portable impact generator | |
| CN106771631A (en) | A kind of down conductor conducting resistance test device | |
| CN109884400A (en) | Transmission tower ground resistance on-Line Monitor Device based on double measurement patterns |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200929 |
|
| RJ01 | Rejection of invention patent application after publication |