CN107478929A - A kind of multifunctional mobile earthing or grounding means test system - Google Patents
A kind of multifunctional mobile earthing or grounding means test system Download PDFInfo
- Publication number
- CN107478929A CN107478929A CN201710655520.XA CN201710655520A CN107478929A CN 107478929 A CN107478929 A CN 107478929A CN 201710655520 A CN201710655520 A CN 201710655520A CN 107478929 A CN107478929 A CN 107478929A
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- China
- Prior art keywords
- module
- current
- test system
- grounding means
- multifunctional mobile
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
-
- 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
Abstract
The invention discloses a kind of multifunctional mobile earthing or grounding means test system, including control module and the voltage regulating module, DC Module, the AC module that are connected in control module；The system is in the operating condition, according to test job need to inject grounded screen for power frequency current signal or DC current signal, strong antijamming capability, measurement accuracy are high, and it is high-current test, the accurate test of the ground connection parameter such as the complicated geological structures such as uniform, nonuniform soil resistivity area, grounding resistance, surface potential gradient, contact electromotive force, step voltage difference can be realized.It is an advantage of the invention that：Caused power frequency heavy-current, there is higher measurement signal to noise ratio, flow through that earth's surface current-carrying depth is deeper, the situation of earth mat is flowed into closer to actual system short-circuit electric current；The D.C. high-current of hundred peace levels can be produced, middle stray electrical current has higher measurement signal to noise ratio over the ground.
Description
Technical field
The present invention relates to the ground connection parameter of overvoltage and grounding technology specialty to measure field, and in particular to a kind of portable more
Function earthing or grounding means test system.
Background technology
It is well known that earthing or grounding means characterisitic parameter includes ground connection resistance in power system, meteorological system, large factories and mines enterprises
The power frequency characterisitic parameter such as anti-, electrical integrity, contact voltage, place surface potential gradient, is surveyed by earthing or grounding means characterisitic parameter
Test system can find hidden danger in time, it is ensured that the safe operation of power network.Thus, earthing or grounding means characterisitic parameter test system
The degree of accuracy is safe for operation to equipment most important.The earthing or grounding means parameter testing of current domestic main flow generally uses alien frequencies method or work
Frequency method, in it facts have proved, because the general capacity of alien frequencies power supply is smaller, there is provided non-power-frequency current typically in 10~20A scopes,
It is shallower for earth's surface current-carrying depth, and when vertical direction soil is more uniform, the ground connection parameter measured is more accurate, and have preferably
Anti-interference；If earth's surface current-carrying depth is deeper, when vertical direction soil is uneven, the grounding resistance and actual value that measure
Larger difference be present.
When measuring high-current equipment ground connection, traditional power current method measurement of Grounding Resistance exist be difficult to eliminate earth mat it is miscellaneous
The interference of electric current is dissipated, and the current lifting device both bulk, the test cable that need are big and heavy, field wiring is difficult, expends substantial amounts of manpower
Material resources.
The content of the invention
The technical problems to be solved by the invention are traditional power current method measurements when measuring high-current equipment ground connection
There is the interference for being difficult to eliminate earth mat stray electrical current in grounding resistance, and the current lifting device both bulk, the test cable that need are big and heavy, existing
Field difficult wiring, substantial amounts of manpower and materials are expended, and it is an object of the present invention to provide a kind of multifunctional mobile earthing or grounding means test system, solution
Certainly the problem of high current earthing test device miniaturization.
The present invention is achieved through the following technical solutions：
A kind of multifunctional mobile earthing or grounding means test system, including control module and the pressure regulation that is connected in control module
Module, DC Module；
Control module：Outer signals are received to control voltage regulating module, DC Module；
Voltage regulating module：Direct current is output to after carrying out pressure regulation to three-phase 380V, 50Hz alternating current according to the control of control module
Module
DC Module：The current rectification transformation exported according to the control of control module to voltage regulating module.This programme is using tune
DC Module carries out the earthing test that the mode of rectification substitutes traditional booster to realize high current, contracting after die block carries out pressure regulation
The volume of small equipment, reduce the difficulty of site operation.
The voltage regulating module is the three-phase induction regulator of power network connection.Induction voltage regulator is to utilize electromagnetic induction principle will
Primary electric energy is fed to secondary by magnetic field induction, further through change Stator and Rotor Windings axis relative angular displacement and certain connection
Mode, enable secondary load voltage in the energized state and obtain the electrical equipment production of smooth stepless continuous regulation in the larger context
Product.Induction voltage regulator can be stepless, smooth, continuously adjust output voltage in the case of on-load.
The DC Module includes rectification module and filtration module.Rectification module is used to alternating current being converted to direct current,
A filtration module is connected after rectification module, the ripple under rated current can be reduced, it is spuious in making test electric current over the ground
Electric current has higher measurement signal to noise ratio, can efficiently accomplish DC ground resistance, ground electrode circuit D.C. resistance, ground connection polar region
The measurement work of the key parameters such as Potential distribution, feed cable shunting, earthing pole step potential difference, pole location equipment contact electromotive force
Make.
The rectification module includes three phase full bridge rectifier transformer, commutation controller and voltage-regulating circuit, the rectification
Controller is integrated in control module.
The output area of the rectification module is output 0~800V of DC voltage, output DC current 280A.
The filtration module is by two and filtering group even forms, and each filtering group is by 3 RC filtering unit groups connected
Into, each RC filter units by and a resistance even and form with a polar capacitor.Using above-mentioned filter circuit, Ke Yishi
Existing direct current ripple quantity meets the requirement of experimental standard below 2%.
Also include the 3-2 transformers being connected on voltage regulating module.3-2 transformers are a kind of balancing transformers, are to be used for spy
The power transformer of different voltage class, it should meet that traction load changes violent, external short circuit and frequently required.In earthing test
In, to meet the earthing test of AC great current, 3-2 transformers are added on voltage regulating module, 380V three-phase electricity is converted to
Two-phase electricity is used to test.
The voltage transformation controller of the 3-2 transformers is integrated in control module.
The output area of the 3-2 transformers is that maximum two cross streams export 800V, electric current 312A.
The voltage regulating module, DC Module, AC module integrated installation are in container., will be complete using modularized design
Portion's testing equipment integrated installation carries out antidetonation, anti-high and low temperature etc. and specially designed in customization container, significant increase test effect
Rate and transportation safety reliability, the difficulty of O＆M maintenance is reduced, also effectively solve plateau mountain region equipment conveying integrity problem, it is complete
Full up foot all kinds of large-scale substation, power station, current conversion station and earthing pole testing requirements.
The present invention compared with prior art, has the following advantages and advantages：
1st, a kind of multifunctional mobile earthing or grounding means test system of the present invention, solves high current earthing test device miniaturization
The problem of, reduce installation difficulty and human cost；
2nd, a kind of multifunctional mobile earthing or grounding means test system of the present invention, the D.C. high-current of hundred peace levels can be produced,
Middle stray electrical current has higher measurement signal to noise ratio over the ground.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding the embodiment of the present invention, forms one of the application
Point, do not form the restriction to the embodiment of the present invention.In the accompanying drawings：
Fig. 1 is schematic structural view of the invention；
Fig. 2 is voltage regulating module circuit diagram of the present invention；
Fig. 3 is DC Module circuit diagram of the present invention；
Fig. 4 is AC module circuit diagram of the present invention.
Embodiment
For the object, technical solutions and advantages of the present invention are more clearly understood, with reference to embodiment and accompanying drawing, to this
Invention is described in further detail, and exemplary embodiment of the invention and its explanation are only used for explaining the present invention, do not make
For limitation of the invention.
Embodiment
As shown in Figures 1 to 4, a kind of multifunctional mobile earthing or grounding means test system of the present invention, including control module and
Voltage regulating module, DC Module, the AC module being connected in control module；The voltage regulating module is the three-phase induction of power network connection
Pressure regulator.Induction voltage regulator can be stepless, smooth, continuously adjust output voltage in the case of on-load.The DC Module bag
Include rectification module and filtration module.Rectification module is used to AC energy be converted to direct current energy.Rectification module is also connected with filtering
Module is used to reduce current ripple.The rectification module includes three phase full bridge rectifier transformer, commutation controller and voltage adjustment
Circuit.I.e. described rectification module is rectifier cabinet, and direct current, built-in three phase full bridge rectifier transformer, rectification are made into for alternating current
Control and voltage-regulating circuit, while also direct current output loop.The commutation controller is integrated in control module.It is described whole
The output area of flow module is output 0~800V of DC voltage, output DC current 280A.Produce the big electricity of direct current of hundred peace levels
Stream, middle stray electrical current has higher measurement signal to noise ratio over the ground, can efficiently accomplish DC ground resistance, ground electrode circuit direct current
The keys such as resistance, the distribution of earthing pole ground potential, feed cable shunting, earthing pole step potential difference, pole location equipment contact electromotive force
AC module described in the measurement work of parameter is 3-2 transformers.3-2 transformers are a kind of balancing transformers, for by three-phase electricity
The transformation of electrical energy of Force system is two-phase electricity.The voltage transformation controller of the 3-2 transformers is integrated in control module.The 3-2 becomes
The output area of depressor is that maximum two cross streams export 800V, electric current 312A.Power frequency heavy-current caused by system, have higher
Signal to noise ratio is measured, flows through that earth's surface current-carrying depth is deeper, the situation of earth mat, Er Qiezhen are flowed into closer to actual system short-circuit electric current
To Cold And Frozen-soil Regions soil resistivity skewness, more targetedly.The voltage regulating module, DC Module, exchange mould
Block integrated installation is in container.Total Test integration of equipments is installed in customization container, carries out antidetonation, anti-high and low temperature
Deng special design, significant increase testing efficiency and transportation safety reliability, the difficulty of O＆M maintenance is reduced, also effectively solves plateau
Mountain region equipment conveying integrity problem, fully meet all kinds of large-scale substations, power station, current conversion station and earthing pole testing requirement.
Control module：Outer signals are received to be controlled voltage regulating module, DC Module, AC module；
Voltage regulating module：Direct current is output to after carrying out pressure regulation to three-phase 380V, 50Hz alternating current according to the control of control module
Module and AC module；
DC Module：Handled according to the electric current that the control of control module exports to voltage regulating module；
AC module：Handled according to the electric current that the control of control module exports to voltage regulating module.The system is working
Under state, according to test job need to inject grounded screen for power frequency current signal or DC current signal, antijamming capability
By force, measurement accuracy is high, and is high-current test, can realize the complicated geological structures such as uniform, nonuniform soil resistivity area, connect
Ground resistance, surface potential gradient, contact electromotive force, step voltage difference etc. are grounded the accurate test of parameter.
Embodiment 2
The present embodiment and the difference of embodiment 1 are, due to needing the ripple under rated current to be less than 2% during direct current output
Direct current output, filter circuit uses 6 RC filter units, and 6 filter units be divided into and connect two groups, every group is filtered by 3 RC
Ripple unit series winding composition, now, through measurement, current ripple is about 1.95%.
Embodiment 3
The present embodiment and the difference of embodiment 2 are, due to needing the ripple under rated current to be less than 2% during direct current output
Direct current output, filter circuit formed using 5 RC filter units, now, using series winding and and the multiple combinations that even form survey
After examination, through measurement, current ripple minimum about 2.5%, the parameter needed for experiment is unable to reach.
Above-described embodiment, the purpose of the present invention, technical scheme and beneficial effect are carried out further
Describe in detail, should be understood that the embodiment that the foregoing is only the present invention, be not intended to limit the present invention
Protection domain, within the spirit and principles of the invention, any modification, equivalent substitution and improvements done etc., all should include
Within protection scope of the present invention.
Claims (10)
1. a kind of multifunctional mobile earthing or grounding means test system, it is characterised in that including control module and be connected to control mould
Voltage regulating module, DC Module on block；
Control module：Outer signals are received to control voltage regulating module, DC Module；
Voltage regulating module：DC Module is output to after carrying out pressure regulation to three-phase 380V, 50Hz alternating current according to the control of control module
DC Module：The current rectification transformation exported according to the control of control module to voltage regulating module.
A kind of 2. multifunctional mobile earthing or grounding means test system according to claim 1, it is characterised in that the pressure regulation
Module is the three-phase induction regulator of power network connection.
A kind of 3. multifunctional mobile earthing or grounding means test system according to claim 1, it is characterised in that the direct current
Module includes rectification module and filtration module.
A kind of 4. multifunctional mobile earthing or grounding means test system according to claim 3, it is characterised in that the rectification
Module includes three phase full bridge rectifier transformer, commutation controller and voltage-regulating circuit, and the commutation controller is integrated in control
In module.
A kind of 5. multifunctional mobile earthing or grounding means test system according to claim 3, it is characterised in that the rectification
The output area of module is output 0~800V of DC voltage, output DC current 280A.
A kind of 6. multifunctional mobile earthing or grounding means test system according to claim 3, it is characterised in that the filtering
Module is by two and filtering group even forms, and each filtering group is made up of the RC filter units of 3 series connection, each RC filter units
By and a resistance even and form with a polar capacitor.
7. a kind of multifunctional mobile earthing or grounding means test system according to claim 1, it is characterised in that also include connecting
The 3-2 transformers being connected on voltage regulating module.
A kind of 8. multifunctional mobile earthing or grounding means test system according to claim 7, it is characterised in that the 3-2
The voltage transformation controller of transformer is integrated in control module.
A kind of 9. multifunctional mobile earthing or grounding means test system according to claim 8, it is characterised in that the 3-2
The output area of transformer is that maximum two cross streams export 800V, electric current 312A.
A kind of 10. multifunctional mobile earthing or grounding means test system according to claim 1, it is characterised in that the tune
Die block, DC Module, AC module integrated installation are in container.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710655520.XA CN107478929A (en) | 2017-08-03 | 2017-08-03 | A kind of multifunctional mobile earthing or grounding means test system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710655520.XA CN107478929A (en) | 2017-08-03 | 2017-08-03 | A kind of multifunctional mobile earthing or grounding means test system |
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| Publication Number | Publication Date |
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| CN107478929A true CN107478929A (en) | 2017-12-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710655520.XA Pending CN107478929A (en) | 2017-08-03 | 2017-08-03 | A kind of multifunctional mobile earthing or grounding means test system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108845195A (en) * | 2018-04-15 | 2018-11-20 | 武汉市整流器研究所 | A kind of DC converter station earthing pole parameter tester |
Citations (5)
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| US4070612A (en) * | 1976-06-02 | 1978-01-24 | Geonics Limited | Method and apparatus for measuring terrain resistivity |
| CN1497259A (en) * | 2002-10-10 | 2004-05-19 | ������������ʽ���� | Direct earth detector and system connecting generating device using it |
| CN201852887U (en) * | 2010-11-24 | 2011-06-01 | 西安光谷通信技术有限公司 | Grounded resistance tester with single jaw |
| CN202854185U (en) * | 2012-09-11 | 2013-04-03 | 天津市电力公司 | Square-wave signal generator for measuring resonant frequency of resonance grounding net |
| CN106526330A (en) * | 2016-12-30 | 2017-03-22 | 贵州电网有限责任公司电力科学研究院 | Portable impact current generator for measuring impact ground resistance |
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2017
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Patent Citations (5)
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|---|---|---|---|---|
| US4070612A (en) * | 1976-06-02 | 1978-01-24 | Geonics Limited | Method and apparatus for measuring terrain resistivity |
| CN1497259A (en) * | 2002-10-10 | 2004-05-19 | ������������ʽ���� | Direct earth detector and system connecting generating device using it |
| CN201852887U (en) * | 2010-11-24 | 2011-06-01 | 西安光谷通信技术有限公司 | Grounded resistance tester with single jaw |
| CN202854185U (en) * | 2012-09-11 | 2013-04-03 | 天津市电力公司 | Square-wave signal generator for measuring resonant frequency of resonance grounding net |
| CN106526330A (en) * | 2016-12-30 | 2017-03-22 | 贵州电网有限责任公司电力科学研究院 | Portable impact current generator for measuring impact ground resistance |
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| 李祥超 等: "测量电流的选择和地极安排", 《防雷装置试验理论与实践》 * |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108845195A (en) * | 2018-04-15 | 2018-11-20 | 武汉市整流器研究所 | A kind of DC converter station earthing pole parameter tester |
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Application publication date: 20171215 |