CN108445297A - The monitoring method and system of Resistance of Grounding Grids - Google Patents

The monitoring method and system of Resistance of Grounding Grids Download PDF

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Publication number
CN108445297A
CN108445297A CN201810347143.8A CN201810347143A CN108445297A CN 108445297 A CN108445297 A CN 108445297A CN 201810347143 A CN201810347143 A CN 201810347143A CN 108445297 A CN108445297 A CN 108445297A
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CN
China
Prior art keywords
resistance
earth
return circuit
grounded screen
interpole
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CN201810347143.8A
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Chinese (zh)
Inventor
娄仁杰
张诗博
李云峰
刘攀
董彬彬
陈思学
杨勇
戴丽平
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China National Petroleum Corp
China Petroleum and Natural Gas Co Ltd
CNPC Research Institute of Safety and Environmental Technology Co Ltd
Original Assignee
China Petroleum and Natural Gas Co Ltd
CNPC Research Institute of Safety and Environmental Technology Co Ltd
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Application filed by China Petroleum and Natural Gas Co Ltd, CNPC Research Institute of Safety and Environmental Technology Co Ltd filed Critical China Petroleum and Natural Gas Co Ltd
Priority to CN201810347143.8A priority Critical patent/CN108445297A/en
Publication of CN108445297A publication Critical patent/CN108445297A/en
Pending legal-status Critical Current

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G01R27/20Measuring earth resistance; Measuring contact resistance, e.g. of earth connections, e.g. plates
    • G01R27/205Measuring contact resistance of connections, e.g. of earth connections

Abstract

The embodiment of the present application provides a kind of monitoring method and system of Resistance of Grounding Grids, wherein this method includes:Emit pulse electric gesture by radio-frequency generator, to form exciting current in earth-return circuit, wherein earth-return circuit includes:Grounded screen to be measured, interpole, current collector, auxiliary are extremely fixed on the earthing pole at the position away from grounded screen pre-determined distance in advance;The exciting current in earth-return circuit is acquired by current collector;According to pulse electric gesture, exciting current, Resistance of Grounding Grids is determined, since the program around grounded screen by burying permanent interpole in advance, earth-return circuit is constituted with grounded screen;Resistance of Grounding Grids is determined further according to the exciting current formed based on pulse electric gesture in earth-return circuit, to solve the technical problem of poor accuracy existing for existing method, implementation cost height, process complexity, the technique effect that can be accurately and efficiently monitored in real time to large-scale grounding network ground resistance is reached.

Description

The monitoring method and system of Resistance of Grounding Grids
Technical field
This application involves oil tank technical field of safety protection, more particularly to a kind of monitoring method of Resistance of Grounding Grids and System.
Background technology
Large-scale oil storage tank or building, such as large-scale external floating roof tank, are exposed to open air mostly, and volume is larger, be easy by Lightning stroke threatens.Would generally be the corresponding grounded screen of the design such as large-scale external floating roof tank, so as to can be by connecing when by being struck by lightning Electric current is rapidly discharged into the earth and carries out lightning protection by earth mat.
Above-mentioned grounded screen is usually embedded in underground, directly can not be observed and safeguard.But as time goes by, it connects Earthing pole in earth mat underground may by soil substance or microbiologic(al) corrosion, cause Resistance of Grounding Grids to become Change.For example, Resistance of Grounding Grids is more than 10 Ω, leads to the requirement that cannot reach lightning protection since corrosion can become larger. Therefore, the security protection for facilities such as oil tanks accurately is monitored with important to the Resistance of Grounding Grids of buried underground Meaning.
Currently, existing method is by artificial detection method mostly, simple portable ground connection electricity is utilized by testing staff Hinder tester (such as 4105 tables) periodic measurement Resistance of Grounding Grids.When implementing due to the above method, detection is required every time Personnel on site lays corresponding circuits and is detected again.Implementation process is complicated, and implementation cost is also relatively high.And it is limited to people Work measures, and can only often carry out power frequency measurement, can not simulate true lightning current, causes to measure obtained result often accuracy It is relatively poor.In summary, existing method determines Resistance of Grounding Grids poor accuracy, implements when it is implemented, often existing Technical problem of high cost, implementation process is complicated.
In view of the above-mentioned problems, currently no effective solution has been proposed.
Invention content
The embodiment of the present application provides a kind of monitoring method and system of Resistance of Grounding Grids, to solve in existing method The technical problem of existing determining Resistance of Grounding Grids poor accuracy, implementation cost height, implementation process complexity, reaching can be accurate Really, the technique effect that efficiently large-scale grounding network ground resistance is monitored in real time.
The embodiment of the present application provides a kind of monitoring method of Resistance of Grounding Grids, including:
Pulse electric gesture is generated by radio-frequency generator, to form exciting current in earth-return circuit, wherein the ground connection Circuit includes:Grounded screen to be measured, interpole, current collector, the auxiliary are extremely fixed on default away from the grounded screen in advance Earthing pole at the position of distance;
The exciting current in the earth-return circuit is acquired by current collector;
According to the pulse electric gesture, the exciting current, Resistance of Grounding Grids is determined.
In one embodiment, the plasma ground pole of the auxiliary extremely red copper material.
In one embodiment, the pre-determined distance is 5 meters.
In one embodiment, one end of the current collector is connected by conducting wire with the interpole, the electricity The other end of stream collector is connected by conducting wire with the earthing pole in the grounded screen.
In one embodiment, the conducting wire is sheath annealed copper wire.
In one embodiment, according to the pulse electric gesture, the exciting current, Resistance of Grounding Grids is determined, Including:
According to the pulse electric gesture, the exciting current, loop resistance is determined;
According to the loop resistance, the resistance of the resistance of the interpole, the conducting wire, the Grounding electricity is determined Resistance, wherein the resistance of the conducting wire is measured by bridge method, and the resistance of the interpole is measured by pressure decline method.
In one embodiment, the grounded screen includes the grounded screen for large-scale external floating roof tank.
The embodiment of the present application also provides a kind of monitoring system of Resistance of Grounding Grids, the system comprises:Monitor, One end of interpole, the monitor is connected by conducting wire with the earthing pole in grounded screen to be measured, the other end of the monitor It is connected with the interpole by conducting wire, wherein:
The earthing pole for assisting extremely being fixed on the position away from the grounded screen pre-determined distance in advance;
The monitor includes radio-frequency generator, current collector, processor, wherein the radio-frequency generator is for producing Raw pulse electric gesture, to form exciting current in earth-return circuit;The current collector is for acquiring in the earth-return circuit Exciting current;The processor is used to, according to the pulse electric gesture, the exciting current, calculate Resistance of Grounding Grids.
In one embodiment, the system also includes alarms, and the alarm is connected with the monitor, described Alarm is used to send out alarm in the case where Resistance of Grounding Grids is more than secure threshold.
In one embodiment, the system also includes information generator, described information transmitter and the monitors It is connected, described information transmitter is used to send out warning short message in the case where Resistance of Grounding Grids is more than secure threshold.
In the embodiment of the present application, it is contemplated that the characteristics of large-scale grounding network, buried around grounded screen in advance permanent Interpole, to be constituted earth-return circuit with grounded screen;Further according to the exciting current formed based on pulse electric gesture in earth-return circuit Determine Resistance of Grounding Grids, to solve in existing method due to test every time will lay again it is comparatively huge, The skill of determination Resistance of Grounding Grids poor accuracy, implementation cost height, implementation process complexity caused by complicated earth-return circuit Art problem reaches the technique effect that real time on-line monitoring can be accurately and efficiently carried out to large-scale grounding network ground resistance.
Description of the drawings
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this Some embodiments described in application, for those of ordinary skill in the art, in the premise of not making the creative labor property Under, other drawings may also be obtained based on these drawings.
Fig. 1 is the process chart of the monitoring method of the Resistance of Grounding Grids provided according to the application embodiment;
Fig. 2 is using the earth-return circuit schematic diagram constructed by the 2D methods in existing method;
Fig. 3 is using the earth-return circuit schematic diagram constructed by the triangulation method in existing method;
Fig. 4 is the earth-return circuit constructed by the monitoring method of the Resistance of Grounding Grids provided according to the application embodiment Schematic diagram;
Fig. 5 is the earth-return circuit constructed by the monitoring method of the Resistance of Grounding Grids provided according to the application embodiment Schematic equivalent circuit;
Fig. 6 is the electronic equipment composed structure of the monitoring method based on Resistance of Grounding Grids provided by the embodiments of the present application Schematic diagram;
Fig. 7 be in a Sample Scenario using Resistance of Grounding Grids provided by the embodiments of the present application monitoring method and The structure composition schematic diagram of the external floating roof tank large ground network ground resistance intelligent checking system of system design.
Specific implementation mode
In order to make those skilled in the art better understand the technical solutions in the application, below in conjunction with the application reality The attached drawing in example is applied, technical solutions in the embodiments of the present application is clearly and completely described, it is clear that described implementation Example is merely a part but not all of the embodiments of the present application.Based on the embodiment in the application, this field is common The every other embodiment that technical staff is obtained without making creative work should all belong to the application protection Range.
In view of existing method design is relatively easy, the interim laying detection circuit in testing staff scene is typically relied on, then Pass through portable grounding resistance tester Grounding Resistance Measurement.Due to for large-scale oil tank or building, such as large size External floating roof tank, volume is relatively large (such as volume reaches 10 ten thousand steres), and corresponding grounded screen to be detected is also relatively (such as the area of grounded screen may reach 10000 square metres) greatly causes to monitor above-mentioned Grounding using existing method When resistance, be required for laying complex, huge detection circuit temporarily every time, that is, exist implementation process it is complex, implement The problem of the cost is relatively high.In addition, existing method is limited to manual site's measurement, power frequency measurement can only be often carried out, it can not Real simulation lightning current, cause determined by Resistance of Grounding Grids error is larger, accuracy is poor.For example, cannot be direct The impulse earthed resistance of grounded screen is accurately measured.For the basic reason for generating above-mentioned technical problem, the application considers To the specific feature of large-scale grounding network, original detection method is improved, by the way that fixation is buried around grounded screen in advance If permanent interpole, to be constituted improved earth-return circuit with grounded screen;It recycles in earth-return circuit based on pulse electric gesture Exciting current simulates lightning current, and to calculate Resistance of Grounding Grids, ground connection is determined present in existing method to solve The technical problem of net ground resistance poor accuracy, implementation cost height, implementation process complexity, reaching can be accurately and efficiently to big The technique effect that type Resistance of Grounding Grids is monitored in real time.
Based on above-mentioned thinking thinking, the embodiment of the present application provides a kind of monitoring method of Resistance of Grounding Grids.Specifically The process chart of the monitoring method of the Resistance of Grounding Grids provided according to the application embodiment shown in please referring to Fig.1. The monitoring method of Resistance of Grounding Grids provided by the embodiments of the present application, when it is implemented, may comprise steps of.
In the present embodiment, the grounded screen can specifically include the grounded screen that scale is more than threshold value scale.Specifically, The scale can be understood as grounded screen of the area more than threshold area of grounded screen more than the grounded screen of threshold value scale.Wherein, Above-mentioned threshold area can be specifically 10,000 square metres, for example, large-scale external floating roof tank grounded screen etc..Correspondingly, the application is real The monitoring method for applying the Resistance of Grounding Grids that example is provided is the giant ground that can be applied to be more than area 10,000 square metres Net carries out electrical resistance monitoring.Certainly it should be noted that 10,000 square metres cited by above-mentioned are one kind and schematically illustrate.It is specific real Shi Shi, can also as the case may be and construction requirement, the monitoring for the Resistance of Grounding Grids that the embodiment of the present application is provided Method is applied to the monitoring of the ground resistance of other fairly large grounded screens.It is emphasized that existing Grounding The monitoring method of resistance is often the ground grid design for small-scale, can only detect connecing for the grounded screen of small-scale Ground resistance.Specifically, existing method due to being limited to realization principle, is carrying out the grounded screen of small-scale using existing method When Resistance of Grounding Grids monitors, the earth-return circuit that laying scale is relatively large, more complex is just needed, which increase realities Apply cost and difficulty of construction.Cause using existing method often can not effectively to large-scale grounding network (scale be more than threshold value rule The grounded screen of mould) ground resistance carry out real time on-line monitoring.Existing method is just being allowed in monitoring large-scale grounding network ground connection The deficiency of resistance, has considered the specific feature of large-scale grounding network, and the application just designs the prison different from existing method Survey scheme, that is, provide method described below, effectively to be monitored in real time to large-scale grounding network ground resistance.
S11:Pulse electric gesture is generated by radio-frequency generator, to form exciting current in earth-return circuit, wherein described Earth-return circuit includes:Grounded screen to be measured, interpole, current collector, the auxiliary are extremely fixed in advance away from the grounded screen Earthing pole at the position of pre-determined distance.
In one embodiment, above-mentioned grounded screen can be specifically a kind of grounded screen of large size.For example, can be specifically The grounded screen etc. of large-scale external floating roof tank.
The grounded screen of above-mentioned large size is carried out since the scale of grounded screen, range are usually bigger using existing method When Resistance of Grounding Grids monitors, correspondingly generally require to lay relatively large earth-return circuit temporarily.For example, a kind of existing side It is that corresponding earth-return circuit is laid using 2D principles method temporarily in method, it specifically can be refering to shown in Fig. 2 using in existing method 2D methods constructed by earth-return circuit schematic diagram.When implementation need first near grounded screen position lay respectively voltage pole P and Electric current pole C builds earth-return circuit, then measures grounded screen to be monitored using above-mentioned earth-return circuit by earth resistance tester Ground resistance.Earth-return circuit is built when laying voltage pole P and electric current pole C, needs first to be determined according to the specific scale of grounded screen Corresponding installation position.Usually require that voltage pole P and grounded screen distance d to be monitored12For the clinodiagonal distance D of grounded screen One times, i.e. D;It is required that electric current pole C and grounded screen distance d13Be twice of the clinodiagonal distance D of grounded screen, i.e. 2D.Due to Grounded screen to be monitored is larger, i.e. the numerical value of D is relatively large, at this moment to lay and build in specific position according to the method described above Earth-return circuit, certainly will need to establish the relatively large earth-return circuit of scale leads to that implementation process is more complicated, implementation cost is opposite It is higher.In addition, existing method is interim structure earth-return circuit mostly, i.e., voltage pole, electric current pole are laid temporarily.This interim laying It is often cumbersome when specific operation.Occur for example, the ground of grounded screen region may be cement flooring or earth's surface Hardening, at this moment often can not be inserted directly into corresponding voltage pole, electric current and extremely build above-mentioned earth-return circuit, it usually needs first strike Above-mentioned voltage pole, electric current pole could be laid behind broken cement flooring, construction cost is relatively high, and work progress is also cumbersome.This Outside, refering to the earth-return circuit schematic diagram constructed by the triangulation method shown in Fig. 3 using in existing method, it is known that utilize Fig. 3 institutes The triangulation method shown is similar with 2D methods, can also have the above problem and be difficult to solve, that is, establishes the relatively large earth-return circuit of scale Lead to that implementation process is more complicated, implementation cost is relatively high, it is troublesome in poeration.
For the particular problem existing in application of earth-return circuit used in existing method, by analyzing giant ground The specific feature of net fixes at the position away from grounded screen pre-determined distance to be monitored lay forever in the embodiment of the present application in advance The interpole of long property, constitutes earth-return circuit used by the present embodiment using interpole, grounded screen, current collector, that is, improves Ground connection circuit.It specifically can be refering to the prison of the Resistance of Grounding Grids shown in Fig. 4 provided according to the application embodiment Earth-return circuit schematic diagram constructed by survey method.
In one embodiment, when specifically laying above-mentioned improved earth-return circuit, can while laying grounded screen, It is fixed in the position apart from grounded screen pre-determined distance and lays permanent interpole, and any earthing pole and auxiliary in grounded screen Current collector (or monitor, the monitor have the function of acquisition electric current) is set between pole, and by current collector One end is connected with any earthing pole in grounded screen, and the other end of current collector is connected with interpole.So as to complete this Shen The laying of improved earth-return circuit that please be in embodiment.Then according to construction needs, be laid with cement flooring or carry out it is follow-up its He constructs.It should be noted that above-mentioned interpole is a kind of permanent interpole, it can be understood as the interpole and grounded screen It is equally embedded in underground always, even if test is over without dial-out, can be used for the test of next time.Above-mentioned current collector can be with Similar to interpole, for good and all it is fixed in earth-return circuit;Can also be a kind of dismountable measuring instrument, specifically, There are connection jaws, such as connection jaws A and connection jaws B on conducting wire that can be between interpole and the earthing pole of grounded screen.It is needing When being tested, accesses current collector by connection jaws and constitute the earth-return circuit completed to carry out Resistance of Grounding Grids It measures;After being completed, current collector can be removed and wait for use next time.
In one embodiment, it is 1.5KHz that above-mentioned pulse electric gesture, which can be specifically frequency, and amplitude is the pulse of 60V Electromotive force so can more accurate, truly simulate situation when lightning stroke, so as to formation and thunder in earth-return circuit The exciting current that frequency, the size of electric current are closer to, so as to directly, accurately measure impulse earthed resistance.It is different from Existing method, existing method are limited to manual measurement, the power frequency used usually only 110Hz, are much smaller than the frequency of lightning current Rate, therefore power frequency earthing resistance can only be measured and impulse earthed resistance can not be measured, if to measure impact based on existing method Ground resistance is then needed to be converted using measured industrial frequency electric resistance, obtains impulse earthed resistance indirectly.In view of existing side Method can not often measure impulse earthed resistance, and can only first measure power frequency earthing resistance, then be pushed away by power frequency earthing resistance Calculate impulse earthed resistance.And method provided by the embodiments of the present application can directly simulate lightning stroke process, directly measure corresponding punching Ground resistance is hit, so as to reach the impulse earthed resistance for being more accurately determined grounded screen to be monitored, is carried for lightning protection For the technique effect of more accurate and effective reference.
In one embodiment, above-mentioned current acquisition implement body can be that independent support exchanges electrometric electric current Table can also be the structure or function module for being integrally disposed in same monitor China for current measurement with radio-frequency generator.
In one embodiment, it is contemplated that above-mentioned interpole is a kind of permanent interpole, that is, needs to be embedded in ground for a long time Under, it has not been convenient to it often takes out and replaces;It, may if the resistance value of interpole is larger and it is required that the resistance value of interpole is relatively small Resistance of Grounding Grids can be had an impact, or even the lightning protection effect of grounded screen can be influenced;In addition underground environment would generally Relatively badly, such as underground, water, chemical substance, microorganism etc. can cause to corrode to interpole, lead to interpole Resistance value may change, so that Resistance of Grounding Grids can not subsequently be accurately calculated.It is therefore desirable to used auxiliary Help that great standby resistance value is small, corrosion resistant characteristic.In the present embodiment, in order to meet above-mentioned requirements, red copper can specifically be selected The plasma ground pole of material is as interpole.Often resistance value is relatively small for the earthing pole of the type, has preferable anti-corrosive properties Can, the variation range for being embedded in resistance value behind underground is also relatively small.Specifically, the inside of the plasma ground pole of above-mentioned red copper material It is separately filled with two kinds of anion materials with outside.Specifically, the plasma material of external filling is to have strong water absorbing force, strong suction Attached power, high-cation exchange etc. based on the material of performances, and be equipped with have long-acting, drop resistance, anti-corrosion function be strong, the coefficient of expansion not by The chemical material of the performances such as temperature change influence, high pressure resistant is as auxiliary material;The plasma material of inside filling has with special Based on electron ion compound, so as to fully absorb the moisture in soil, and can be by deliquescent effect by active electron ion It is effectively discharged into soil, promotes sustained release drop resistance outside conductor, so as to which resistance value is kept to stablize relatively for a long time.Certainly, it needs It is noted that above-mentioned cited interpole is intended merely to that the application embodiment is better described.When it is implemented, also may be used With as the case may be, such as specific construction environment, it selects to use other kinds of earthing pole as above-mentioned interpole.It is right This, the application is not construed as limiting.
In one embodiment, the pre-determined distance specifically could be provided as 5 meters.In this way, can ensure to build energy While enough efficiently and accurately earth-return circuits of Grounding Resistance Measurement, implementation cost is taken into account, laying is effectively reduced and connects The complexity of earth-return.Certainly, it should be noted that 5 meters cited by above-mentioned are that one kind schematically illustrates.Specific implementation When, other numerical value can also be set as the case may be as pre-determined distance.In this regard, the application is not construed as limiting.
In one embodiment, one end of the current collector can specifically pass through conducting wire and the interpole phase Even, the other end of the current collector can be specifically connected by conducting wire with the earthing pole in the grounded screen.In this way, can be with Grounded screen to be monitored, current collector, interpole are connected, complete earth-return circuit is constituted.
In one embodiment, the conducting wire is specifically as follows the sheath annealed copper wire that cross-sectional area is 10 square millimeters. There is above-mentioned conducting wire preferable electric conductivity, high stability to be embedded in underground for a long time and be not easy to cause resistance value to become due to corrosion Change, is suitably employed in above-mentioned earth-return circuit.Certainly, the above-mentioned conducting wire enumerated is that one kind schematically illustrates, and should not be constituted Improper restriction to the application.
S12:The exciting current in the earth-return circuit is acquired by current collector.
In one embodiment, shape can be encouraged in earth-return circuit after generating pulse electric gesture using radio-frequency generator At exciting current, current collector with automatic collection and can record the exciting current in earth-return circuit.
S13:According to the pulse electric gesture, the exciting current, Resistance of Grounding Grids is determined.
In one embodiment, in known pulse electric gesture, determine exciting current after, when it is implemented, can join Earth-return circuit constructed by the monitoring method of the Resistance of Grounding Grids shown in fig. 5 provided according to the application embodiment is provided Resistance of Grounding Grids to be monitored is calculated in schematic equivalent circuit in the following way:
S1:According to the pulse electric gesture, the exciting current, loop resistance is determined;
S2:According to the loop resistance, the resistance of the resistance of the interpole, the conducting wire, determine that the grounded screen connects Ground resistance.
In one embodiment, when it is implemented, above-mentioned Resistance of Grounding Grids can be calculated according to following formula:
RGround=RIt returns-RGold-RIt is auxiliary
Wherein, RGroundResistance of Grounding Grids, R can be specifically expressed asIt returnsThe circuit electricity of earth-return circuit can be specifically expressed as Resistance, RGoldThe resistance of conducting wire, R can be specifically expressed asIt is auxiliaryThe resistance of interpole can be specifically expressed as.
In one embodiment, above-mentioned loop resistance can specifically be calculated according to following formula:
Wherein, RIt returnsThe loop resistance of earth-return circuit, U can be specifically expressed asArteries and veinsPulse electric gesture, I can be specifically expressed asSwash Exciting current can be specifically expressed as.
In one embodiment, the resistance of above-mentioned conducting wire can specifically be measured by bridge method, the electricity of above-mentioned interpole Resistance can specifically be measured by pressure decline method.Certainly, the above-mentioned cited resistance for determining conducting wire, interpole resistance side Method is that one kind schematically illustrates.When it is implemented, can also be suitable using other with required precision selection as the case may be Method measure the resistance of the resistance of above-mentioned conducting wire, interpole.
In the embodiment of the present application, compared to existing method, due to consideration that the specific feature of large-scale grounding network, in advance Permanent interpole is buried around grounded screen, to be constituted earth-return circuit with grounded screen;Further according to being based in earth-return circuit Pulse electric gesture is formed by exciting current and determines Resistance of Grounding Grids, to solve in existing method due to testing every time Comparatively huge, complicated earth-return circuit will be laid again leads to existing determination Resistance of Grounding Grids accuracy The technical problem of difference, implementation cost height, implementation process complexity, reaching can be accurately and efficiently to large-scale grounding network ground resistance The technique effect monitored in real time.
In one embodiment, the grounded screen can specifically include but be not limited to use in connecing for large-scale external floating roof tank Earth mat.Certainly, above-mentioned cited grounded screen is a kind of schematical explanation.When it is implemented, can also be by the application reality The monitoring method expansion for applying the Resistance of Grounding Grids of example offer is applied to other kinds of grounded screen.In this regard, the application does not make It limits.
In one embodiment, it is 1.5KHz that the pulse electric gesture, which can specifically include frequency, and amplitude is the arteries and veins of 60V Electromotive force is rushed, lightning stroke process so can be relatively accurately simulated, obtains accurate impulse earthed resistance, is lightning Protection Reference is provided.In addition, the pulse electric gesture can also power frequency electromotive force, can so measure accurate power-frequency earthing Resistance, to provide reference for daily electricity consumption protection.Certainly, above-mentioned cited electromotive force is intended merely to that this Shen is better described Please embodiment, when it is implemented, other suitable electromotive force can also be selected as upper as the case may be and construction requirement State pulse electric gesture.In this regard, the application is not construed as limiting.
It can be seen from the above description that the monitoring method of Resistance of Grounding Grids provided by the embodiments of the present application, by In the specific feature for considering large-scale grounding network, in advance around grounded screen bury permanent interpole, with ground connection Net constitutes earth-return circuit;Grounding electricity is determined further according to exciting current is formed by based on pulse electric gesture in earth-return circuit Resistance determines that Resistance of Grounding Grids poor accuracy, implementation cost are high, implementation process is multiple to solve present in existing method Miscellaneous technical problem reaches the technique effect that can be accurately and efficiently monitored in real time to large-scale grounding network ground resistance;Again By using the plasma ground pole with the low red copper material of corrosion-resistant, resistance value as permanent interpole, reduce auxiliary Help pole due to be corroded lead to change in resistance caused by error, further improve the accuracy of determining Resistance of Grounding Grids.
Based on same inventive concept, a kind of monitoring system of Resistance of Grounding Grids is additionally provided in the embodiment of the present invention, As described in the following examples.The principle and Resistance of Grounding Grids solved the problems, such as due to the monitoring system of Resistance of Grounding Grids Monitoring method it is similar, therefore the implementation of the monitoring system of Resistance of Grounding Grids may refer to the monitoring of Resistance of Grounding Grids The implementation of method, overlaps will not be repeated.Used below, predetermined function may be implemented in term " unit " or " module " Software and/or hardware combination.Although device described in following embodiment is preferably realized with software, hardware, Or the realization of the combination of software and hardware is also that may and be contemplated.The related content for please referring to Fig. 4 is that the application is implemented A kind of composite structural diagram of the monitoring system for the Resistance of Grounding Grids that example provides, the device can specifically include:It is monitor, auxiliary Help pole (being referred to as permanent interpole), wherein one end of the monitor can specifically be connect by conducting wire with to be monitored Earthing pole in earth mat (i.e. earthed system) is connected, and the other end of the monitor can specifically pass through conducting wire and the interpole It is connected, wherein:
The interpole is specifically as follows the earthing pole for being fixed on the position away from the grounded screen pre-determined distance in advance;
The monitor can specifically include radio-frequency generator, current collector, processor, wherein the high frequency occurs Implement body can be used for generating pulse electric gesture, to form exciting current in earth-return circuit;The current acquisition implement body can For acquiring the exciting current in the earth-return circuit;The processing implement body can be used for according to the pulse electric gesture, The exciting current calculates Resistance of Grounding Grids.
In one embodiment, in order to sending out police to the problematic Resistance of Grounding Grids detected in time Report, so that technical staff can repair in time, to reduce safety accident risk, the system can also include specifically alarm. Wherein, the alarm implement body can be connected with the monitor, and the alarm implement body can be used in Grounding electricity Resistance sends out alarm in the case of being more than secure threshold.Above-mentioned alarm implement body can be a kind of acoustooptic alarm.It is sent out in monitor Existing monitored Resistance of Grounding Grids is more than secure threshold there are when security risk, can send out alarm by the alarm Sound, and/or, flashing warning light is as the mode for sending out alarm, with Grounding electricity of the technical staff near reminding at this There are security risks for resistance.
In one embodiment, when carrying out the Resistance of Grounding Grids monitoring for lightning protection, above-mentioned safety threshold The concrete numerical value of value could be provided as 10 ohm.It is monitored carrying out the Resistance of Grounding Grids for conventional electrical appliance leakage protection When, the concrete numerical value of above-mentioned secure threshold may be set to be 10 ohm.Certainly, it should be noted that above-mentioned cited safety Threshold value is intended merely to that the application embodiment is better described.When it is implemented, according to concrete application situation and can also apply Work requires to select to use other suitable numerical value as secure threshold.In this regard, the application is not construed as limiting.
In one embodiment, the system can also include specifically information generator, described information transmitter and institute It states monitor to be connected, described information sends implement body and can be used for issuing the case where Resistance of Grounding Grids is more than secure threshold Go out to warn short message.Above- mentioned information transmitter can be understood as a kind of supplement to alarm, reach significantly more efficient alarm effect Fruit.For example, it may be possible to when alarm sends out alarm, neighbouring no technical staff causes warning message not pass in time, effectively Pass away, at this moment information generator can directly by warning message in a manner of alarming short message in time, be effectively transferred to Related technical personnel, so that technical staff can in time be handled security risk.
In one embodiment, the interpole is specifically as follows the plasma ground pole of red copper material.The above-mentioned type Interpole have the characteristics that corrosion-resistant, resistance value is small, is suitable as in improved earth-return circuit a part, for good and all fix It is laid near grounded screen.Certainly, above-mentioned cited interpole is that one kind schematically illustrates.When it is implemented, also may be used With as the case may be and construction requirement, using other suitable earthing poles as interpole.In this regard, the application is not construed as limiting.
In one embodiment, it is 1.5KHz that the pulse electric gesture, which can specifically include frequency, and amplitude is the arteries and veins of 60V Rush electromotive force.Can relatively accurately simulate lightning current using above-mentioned electromotive force, so as to directly measure to obtain compared with For accurately impulse earthed resistance.
In one embodiment, when it is implemented, one end of the current collector can specifically pass through conducting wire and institute It states interpole to be connected, the other end of the current collector can specifically pass through conducting wire and the earthing pole phase in the grounded screen Even.It is thus possible to form the earth-return circuit for being connected to grounded screen to be monitored.It should be noted that the earth-return circuit compare with The earth-return circuit that existing method uses is different, it can be understood as is a kind of improved earth-return circuit.The earth-return circuit is laid When required material is relatively less, deployment cost is relatively lower;Simultaneously different from being laid in existing method for supervising temporarily The earth-return circuit of measuring resistance, the earth-return circuit can be fixed and be laid in grounded screen region to be monitored for a long time, and reaching can be with Effect economic, that effectively Resistance of Grounding Grids is monitored in real time.
In one embodiment, the pre-determined distance specifically could be provided as 5 meters.In this way, can construct can use In the earth-return circuit of accurately Grounding Resistance Measurement, while implementation cost can be also taken into account, reduce laid conducting wire Length.Certainly, above-mentioned cited pre-determined distance is that one kind schematically illustrates.When it is implemented, can also be according to specific feelings Condition, for example, the size of grounded screen to be monitored, selects other numerical value as above-mentioned pre-determined distance.In this regard, the application does not limit It is fixed.
In one embodiment, the conducting wire is specifically as follows the sheath annealed copper wire that cross-sectional area is 10 square millimeters. Wherein, the sheath annealed copper wire that above-mentioned cross-sectional area is 10 square millimeters has preferable electric conductivity, and resistance value is relatively small, and steady It is qualitative relatively preferable, suitable for being embedded in grounded screen region underground to be monitored for a long time.Certainly, above-mentioned cited conducting wire It is in order to which the application embodiment is better described.When it is implemented, can also it be selected with construction requirement as the case may be The conducting wire of his appropriate size or material.In this regard, the application is not construed as limiting.
In one embodiment, above-mentioned processing is when it is implemented, can be according to following procedure according to the pulse electric Gesture, the exciting current, determine Resistance of Grounding Grids:According to the pulse electric gesture, the exciting current, circuit electricity is determined Resistance;According to the loop resistance, the resistance of the resistance of the interpole, the conducting wire, the Resistance of Grounding Grids is determined, In, the resistance of the conducting wire is measured by bridge method, and the resistance of the interpole is measured by pressure decline method.
In one embodiment, above system specifically can be used for the ground connection electricity to the grounded screen of large-scale external floating roof tank Resistance carries out long-term monitoring in real time.Certainly, when it is implemented, can also be connect provided by the embodiments of the present application according to construction requirement The Application of Monitoring System of ground network ground resistance is in the monitoring to other kinds of Resistance of Grounding Grids.In this regard, the application does not make It limits.
Each embodiment in this specification is described in a progressive manner, identical similar portion between each embodiment Point just to refer each other, and each embodiment focuses on the differences from other embodiments.Especially for system reality For applying example, since it is substantially similar to the method embodiment, so description is fairly simple, related place is referring to embodiment of the method Part explanation.
It should be noted that system, device, module or unit that the above embodiment illustrates, it specifically can be by computer Chip or entity are realized, or are realized by the product with certain function.For convenience of description, in the present specification, it retouches It is divided into various units when stating apparatus above with function to describe respectively.It certainly, when implementing the application can be the function of each unit It realizes in the same or multiple software and or hardware.
In addition, in the present specification, such as adjective as first and second can be only used for an element or move Make to distinguish with another element or action, without requiring or implying any actual this relationship or sequence.Permit in environment Perhaps in the case of, one in only element, component or step is should not be interpreted as limited to reference to element or component or step (s) It is a, and can be one or more of element, component or step etc..
It can be seen from the above description that the monitoring system of Resistance of Grounding Grids provided by the embodiments of the present application, by In the specific feature for considering large-scale grounding network, in advance around grounded screen bury permanent interpole, with ground connection Net constitutes earth-return circuit;Grounding electricity is determined further according to exciting current is formed by based on pulse electric gesture in earth-return circuit Resistance will lay comparatively huge, complicated earth-return circuit and lead again to solve in existing method due to testing every time Existing determination Resistance of Grounding Grids poor accuracy, the technical problem of implementation cost height, implementation process complexity are caused, energy is reached Enough technique effects that accurately and efficiently large-scale grounding network ground resistance is monitored in real time;Further through using have it is corrosion-resistant, As permanent interpole, reduce interpole causes to hinder due to being corroded for the plasma ground pole of the low red copper material of resistance value Error caused by value variation, further improves the accuracy of determining Resistance of Grounding Grids.
Embodiment further provides a kind of electronic equipment by the application, specifically can be refering to shown in fig. 6 real based on the application The electronic equipment composed structure schematic diagram of the monitoring method of the Resistance of Grounding Grids of example offer is applied, the electronic equipment specifically may be used To include input equipment 61, processor 62, memory 63.Wherein, the input equipment 61 specifically can be used for taking place frequently by height Exciting current in the pulse electric gesture that raw device is sent out, and the earth-return circuit that is acquired by current collector.Wherein, described Earth-return circuit includes:Grounded screen to be measured, interpole, current collector, the auxiliary are extremely fixed in advance away from the grounded screen Earthing pole at the position of pre-determined distance.The processor 62 specifically can be used for according to the pulse electric gesture, the excitation Electric current determines Resistance of Grounding Grids.The memory 63 specifically can be used for storing acquired pulse electric gesture, excitation electricity The data such as stream.
In the present embodiment, the input equipment can be specifically that information exchange is carried out between user and computer system One of main device.The input equipment may include keyboard, mouse, camera, scanner, light pen, writing input board, language Sound input unit etc.;Input equipment is used to initial data be input in computer with the programs for handling these numbers.The input Equipment, which can also obtain, receives the data that other modules, unit, equipment transmit.The processor can be by any appropriate Mode is realized.For example, processor can take such as microprocessor or processor and storage that can be executed by (micro-) processor Computer readable program code (such as software or firmware) computer-readable medium, logic gate, switch, application-specific integrated circuit (Application Specific Integrated Circuit, ASIC), programmable logic controller (PLC) and embedded microcontroller Form etc..The storage implement body can be in modern information technologies for protecting stored memory device.The storage Device may include many levels, in digital display circuit, as long as can preserve binary data can be memory;In integrated electricity The circuit with store function of Lu Zhong, a not no physical form are also memory, such as RAM, FIFO;In systems, have There is the storage device of physical form to be also memory, such as memory bar, TF card.
In the present embodiment, the function and effect of electronic equipment specific implementation, can compare with other embodiment It explains, details are not described herein.
A kind of computer of the monitoring method based on Resistance of Grounding Grids is additionally provided in this theory application embodiment to deposit Storage media, the computer storage media are stored with computer program instructions, and reality is performed in the computer program instructions It is existing:Pulse electric gesture is generated by radio-frequency generator, to form exciting current in earth-return circuit, wherein the earth-return circuit Including:Grounded screen to be measured, interpole, current collector, the auxiliary are extremely fixed in advance away from the grounded screen pre-determined distance Position at earthing pole;The exciting current in the earth-return circuit is acquired by current collector;According to the pulse electric Gesture, the exciting current, determine Resistance of Grounding Grids.
In the present embodiment, above-mentioned storage medium includes but not limited to random access memory (Random Access Memory, RAM), read-only memory (Read-Only Memory, ROM), caching (Cache), hard disk (Hard Disk Drive, HDD) or storage card (Memory Card).The memory can be used for storing computer program instructions.Network is logical Believe that unit can be the interface for carrying out network connection communication according to standard setting as defined in communication protocol.
In the present embodiment, the function and effect of the program instruction specific implementation of computer storage media storage, can To compare explanation with other embodiment, details are not described herein.
It is embodied in Sample Scenario at one, using the monitoring of the Resistance of Grounding Grids of the offer of the embodiment of the present application Method and system monitors the large-scale grounding network ground resistance of certain large-scale external floating roof tank in real time.Specific implementation process can be with It is executed refering to the following contents.
Refering to related content shown in Fig. 4, used external floating roof tank large ground network ground resistance intelligent checking system The composition of (i.e. the monitoring system of Resistance of Grounding Grids) can specifically include:It is connect with geodetic network's earthed system (i.e. grounded screen) Earthing pole (end of down conductor), permanent interpole (i.e. interpole), Intelligent monitoring device (i.e. monitor) composition.
Wherein, electric using Grounding provided by the embodiments of the present application in a Sample Scenario refering to shown in Fig. 7 The structure composition signal of the external floating roof tank large ground network ground resistance intelligent checking system of monitoring method and the system design of resistance Figure, Intelligent monitoring device by main controller module 1, sound and light alarm module 2 (i.e. alarm), data outputting module 3, (i.e. send out by signal Raw device), display module 4, data processing module 5 (i.e. processor), high frequency potential generation module 6 (i.e. radio-frequency generator), high frequency The compositions such as current pickup module 7 (i.e. current collector).
Specifically, above-mentioned data outputting module can by signal conversion unit, wireless transmitting unit, radio receiving unit, The compositions such as concentrator, intelligent supervisor, early warning receiving device, monitor supervision platform.
A continuous earth pole is buried in 5 meters of (i.e. pre-determined distance) ranges of any earthing pole of geodetic network's earthed system as auxiliary Adjuvant grafting earth polar (i.e. interpole), auxiliary earth pole are specifically as follows plasma ground pole, with ensure grounding resistance not by temperature, The influence of the variation of soil moisture degree.Wherein, the resistance value of the auxiliary earth pole can be denoted as " R is auxiliary ";It is flat that interpole can draw 10 Square millimeter sheath annealed copper wire is connected on the A mouths of monitor, and the B mouths of monitor draw 10 square millimeters of sheath annealed copper wires and appoint with earthed system One earthing pole is connected, and the resistance value of two annealed copper wires can be denoted as " R gold ", (be grounded so as to constitute a measure loop Circuit) as shown in figure 4, its equivalent circuit is as shown in Figure 5.By above-mentioned equivalent circuit diagram:Entirely the resistance value in circuit includes: Earthed system grounding resistance, copper flexible cord grounding resistance and permanent interpole grounding resistance.
When it is implemented, it is 1.5KHz that can generate frequency by Intelligent monitoring device radio-frequency generator module, amplitude is The pulse potential of 60V, so as in the circuit of permanent interpole, 10 square millimeters of sheathed conductors, the earth, earthed system composition Upper generation exciting current.The current value of exciting current can be picked up by high-frequency current module.Data processing module can pass through meter The resistance value " R is returned " that entire circuit is calculated in formula R=U/I is calculated, earthed system grounding resistance is calculated according still further to following formula: Earthed system grounding resistance R=R returns-R gold-R is auxiliary." R " value is given to main control module by data processing module, it is main Controller module control display module shows the earthed system resistance value of measurement, if the resistance value measured is more than the peace of setting Total head, main controller module can drive sound and light alarm module to carry out sound-light alarm.Data outputting module can also be by ground connection system Resistance value teletransmission unite to master system.During in calculation formula R=R times-R gold-R is auxiliary, " R gold " can use the electric bridge for measuring resistance Accurate measure obtains, its resistance value is a fixed value, is not changed substantially." R is auxiliary " may be considered single-point grounding pole and connect Ground resistance value can be measured accurately in advance by voltage drop method and be obtained.Wherein, it is desirable that the resistance value of auxiliary earth pole is using process The range of middle variation wants very little.By ensure survey earthed system grounding resistance accuracy, the permanent great body of auxiliary earth The plasma ground pole of red copper material may be used.Specifically, be respectively fitted with inside and out the earthing pole two kinds bear from Sub- packing material, wherein external packing material to be with strong water absorbing force, strong adsorption capacity and the high material of cation exchange property Main body, and be equipped with it is long-acting, drop resistance, anti-corrosion function is strong, the coefficient of expansion is independent of temperature variations, a variety ofization of high voltage withstanding impact Material is auxiliary material;Internal packing material can be special electron ion compound, can fully absorb the moisture in soil, and lead to It crosses deliquescent effect to be effectively discharged into active electron ion in soil, promotes sustained release drop resistance outside conductor, to keep resistance value long-term Stablize.It is emphasized that in specific implementation process, due to by setting up permanent auxiliary earth pole, making permanently to assist Electrode constitutes a circuit (i.e. improved earth-return circuit) with monitored earthed system, and then can pass through Intelligent monitoring device High frequency pumping potential is sent out, loop current is generated on measure loop, which will not be diagonal by earthed system when implementing The limitation of line length, surface sealing treatment conditions.
In the present embodiment, the high frequency potential generation module of above-mentioned Intelligent monitoring device specifically can be used for generating The electric potential signal of 1.5KHz frequencies, to generate high-frequency current on circuit, with high-energy waveform in accurate simulation lightning current Lightning wave, and then it can be detected and flow through the impulse earthed resistance value shown when earthed system, so that based on should The grounding resistance obtained measured by method is more true, accurate.
Analysis and summary are grounded using the monitoring method and systematic survey of Resistance of Grounding Grids provided by the embodiments of the present application The grounding resistance of system, be different from existing method voltage drop method (including:2B methods or triangulation method), voltage drop method needs will be auxiliary Help voltage pole P points far from earthed system, as the Zero potential reference of earthed system, P points are too far away or too close apart from earthed system Measured earthed system grounding resistance will be made bigger than normal or less than normal;Simultaneously for lightning protection earthing system, existing voltage drop method Current source is power frequency 110HZ, is much smaller than the frequency of lightning current, and system when lightning current flows through earthed system that can not really show is in The impulse earthed resistance value revealed.And this is exactly the monitoring method and system of Resistance of Grounding Grids provided by the embodiments of the present application Possessed advantage and good effect.
By above-mentioned Sample Scenario, demonstrates the monitoring method of Resistance of Grounding Grids provided by the embodiments of the present application and be System, due to consideration that the specific feature of large-scale grounding network, buries permanent interpole around grounded screen in advance, with Grounded screen constitutes earth-return circuit;Determine that grounded screen connects further according to exciting current is formed by based on pulse electric gesture in earth-return circuit Ground resistance solves and determines that Resistance of Grounding Grids poor accuracy, implementation cost are high present in existing method, implemented really The technical problem of journey complexity, the technology that reach accurately and efficiently to monitor large-scale grounding network ground resistance in real time are imitated Fruit.
Although mentioning different specific embodiments in teachings herein, the application is not limited to be industry Situation etc. described in standard or embodiment, certain professional standards or the implementation base described using self-defined mode or embodiment On plinth embodiment modified slightly can also realize above-described embodiment it is identical, it is equivalent or it is close or deformation after it is anticipated that Implementation result.It, still can be with using these modifications or the embodiment of deformed data acquisition, processing, output, judgment mode etc. Belong within the scope of the optional embodiment of the application.
Although this application provides the method operating procedure as described in embodiment or flow chart, based on conventional or noninvasive The means for the property made may include more or less operating procedure.The step of being enumerated in embodiment sequence is only numerous steps A kind of mode in execution sequence does not represent and unique executes sequence.It, can when device or client production in practice executes With according to embodiment, either method shown in the drawings sequence is executed or parallel executed (such as at parallel processor or multithreading The environment of reason, even distributed data processing environment).The terms "include", "comprise" or its any other variant are intended to contain Lid non-exclusive inclusion, so that process, method, product or equipment including a series of elements are not only wanted including those Element, but also include other elements that are not explicitly listed, or further include for this process, method, product or equipment Intrinsic element.In the absence of more restrictions, be not precluded including the element process, method, product or There is also other identical or equivalent elements in person's equipment.
Device that above-described embodiment illustrates or module etc. can specifically realize by computer chip or entity, or by having There is the product of certain function to realize.For convenience of description, it is divided into various modules when description apparatus above with function to retouch respectively It states.Certainly, the function of each module is realized can in the same or multiple software and or hardware when implementing the application, The module for realizing same function can be realized by the combination of multiple submodule etc..Device embodiment described above is only Schematically, for example, the division of the module, only a kind of division of logic function, can there is other draw in actual implementation The mode of dividing, such as multiple module or components can be combined or can be integrated into another system, or some features can be ignored, Or it does not execute.
It is also known in the art that other than realizing controller in a manner of pure computer readable program code, it is complete Entirely can by by method and step carry out programming in logic come so that controller with logic gate, switch, application-specific integrated circuit, programmable The form of logic controller and embedded microcontroller etc. realizes identical function.Therefore this controller is considered one kind Hardware component, and the structure that the device for realizing various functions that its inside includes can also be considered as in hardware component.Or Person even, can will be considered as either the software module of implementation method can be hardware again for realizing the device of various functions Structure in component.
The application can describe in the general context of computer-executable instructions executed by a computer, such as program Module.Usually, program module includes routines performing specific tasks or implementing specific abstract data types, program, object, group Part, data structure, class etc..The application can also be put into practice in a distributed computing environment, in these distributed computing environments, By executing task by the connected remote processing devices of communication network.In a distributed computing environment, program module can With in the local and remote computer storage media including storage device.
As seen through the above description of the embodiments, those skilled in the art can be understood that the application can It is realized by the mode of software plus required general hardware platform.Based on this understanding, the technical solution essence of the application On in other words the part that contributes to existing technology can be expressed in the form of software products, the computer software product It can be stored in a storage medium, such as ROM/RAM, magnetic disc, CD, including some instructions are used so that a computer equipment (can be personal computer, mobile terminal, server either network equipment etc.) executes each embodiment of the application or implementation Method described in certain parts of example.
Each embodiment in this specification is described by the way of progressive, same or analogous portion between each embodiment Point just to refer each other, and each embodiment focuses on the differences from other embodiments.The application can be used for crowd In mostly general or special purpose computing system environments or configuration.Such as:Personal computer, server computer, handheld device or Portable device, laptop device, multicomputer system, microprocessor-based system, set top box, programmable electronics set Standby, network PC, minicomputer, mainframe computer include the distributed computing environment etc. of any of the above system or equipment.
Although depicting the application by embodiment, it will be appreciated by the skilled addressee that the application there are many deformation and Variation is without departing from spirit herein, it is desirable to which appended embodiment includes these deformations and changes without departing from the application.

Claims (10)

1. a kind of monitoring method of Resistance of Grounding Grids, which is characterized in that including:
Pulse electric gesture is generated by radio-frequency generator, to form exciting current in earth-return circuit, wherein the earth-return circuit Including:Grounded screen to be measured, interpole, current collector, the auxiliary are extremely fixed in advance away from the grounded screen pre-determined distance Position at earthing pole;
The exciting current in the earth-return circuit is acquired by current collector;
According to the pulse electric gesture, the exciting current, Resistance of Grounding Grids is determined.
2. according to the method described in claim 1, it is characterized in that, the plasma ground pole of the auxiliary extremely red copper material.
3. according to the method described in claim 1, it is characterized in that, the pre-determined distance is 5 meters.
4. according to the method described in claim 1, it is characterized in that, one end of the current collector by conducting wire with it is described auxiliary It helps and is extremely connected, the other end of the current collector is connected by conducting wire with the earthing pole in the grounded screen.
5. according to the method described in claim 4, it is characterized in that, the conducting wire is sheath annealed copper wire.
6. according to the method described in claim 4, it is characterized in that, according to the pulse electric gesture, the exciting current, determine Resistance of Grounding Grids, including:
According to the pulse electric gesture, the exciting current, loop resistance is determined;
According to the loop resistance, the resistance of the resistance of the interpole, the conducting wire, the Resistance of Grounding Grids is determined, Wherein, the resistance of the conducting wire is measured by bridge method, and the resistance of the interpole is measured by pressure decline method.
7. according to the method described in claim 1, it is characterized in that, the grounded screen includes connecing for large-scale external floating roof tank Earth mat.
8. a kind of monitoring system of Resistance of Grounding Grids, which is characterized in that the system comprises:Monitor, interpole, it is described One end of monitor is connected by conducting wire with the earthing pole in grounded screen to be measured, and the other end of the monitor passes through conducting wire and institute Interpole is stated to be connected, wherein:
The auxiliary is extremely fixed on the earthing pole at the position away from the grounded screen pre-determined distance in advance;
The monitor includes radio-frequency generator, current collector, processor, wherein the radio-frequency generator is for generating arteries and veins Electromotive force is rushed, to form exciting current in earth-return circuit;The current collector is used to acquire swashing in the earth-return circuit Encourage electric current;The processor is used to, according to the pulse electric gesture, the exciting current, calculate Resistance of Grounding Grids.
9. system according to claim 8, which is characterized in that the system also includes alarm, the alarm and institute It states monitor to be connected, the alarm is used to send out alarm in the case where Resistance of Grounding Grids is more than secure threshold.
10. system according to claim 8, which is characterized in that the system also includes information generator, described information hairs Device is sent to be connected with the monitor, described information transmitter is used to issue the case where Resistance of Grounding Grids is more than secure threshold Go out to warn short message.
CN201810347143.8A 2018-04-18 2018-04-18 The monitoring method and system of Resistance of Grounding Grids Pending CN108445297A (en)

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Application publication date: 20180824