CN107656144A - A kind of comprehensive detection system and method for transmission line of electricity earthed system - Google Patents
A kind of comprehensive detection system and method for transmission line of electricity earthed system Download PDFInfo
- Publication number
- CN107656144A CN107656144A CN201711125195.2A CN201711125195A CN107656144A CN 107656144 A CN107656144 A CN 107656144A CN 201711125195 A CN201711125195 A CN 201711125195A CN 107656144 A CN107656144 A CN 107656144A
- Authority
- CN
- China
- Prior art keywords
- mtd
- mover
- msub
- mtr
- centerdot
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/20—Measuring earth resistance; Measuring contact resistance, e.g. of earth connections, e.g. plates
- G01R27/205—Measuring contact resistance of connections, e.g. of earth connections
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
Abstract
The invention discloses a kind of comprehensive detection system and method for transmission line of electricity earthed system, eight pairs of voltage transformer summation current transformers are separately positioned on four down conductors of shaft tower and the overhead ground wire of shaft tower left and right ends by system, and in pairs and be disposed adjacent；The annular voltage transformer being arranged on lightning conducter is used to apply voltage to it, the annular voltage transformer being arranged on four down conductors of shaft tower gathers its voltage signal and is sent to earth resistance device, ring current transformer gathers eight groups of current signals of four down conductors of shaft tower and the overhead ground wire of shaft tower left and right ends and is sent to earth resistance device respectively, and earth resistance device carries out that contact resistance resistance is calculated.The present invention carries out the comprehensive detection of the resistance of tower body and grounding body using four down conductors of shaft tower and overhead ground wire as measurement point simultaneously.
Description
Technical field
The present invention relates to power system earthing detection technical field, specifically a kind of transmission line of electricity earthed system it is comprehensive
Close detecting system and method.
Background technology
In the last few years, lightning stroke trip was constantly in first of all kinds of failures.Earthed system is to improve the resistance to thunder of transmission line of electricity
A horizontal basic measures, but do not paid attention to currently for the research of transmission line of electricity earthed system.Not yet carry out and be directed to
The earthed system of transmission line of electricity carries out holistic approach, more lacks the overall merit and detection method of transmission line of electricity lightning protection properties.
At present, earthing or grounding means (overhead ground wire, down conductor and grounding body etc.) is to improve the transmission line of electricity water of resistance to thunder
A flat basic measures.And grounding resistance is to check the sole indicator whether earthing or grounding means reaches regulatory requirements.Therefore, pass through
The feasible method of science, grounding resistance is accurately measured, for ensureing that transmission line of electricity lightning protection properties are particularly important.With
It is several existing typical ground resistance measurement methods down：
Method one：Three electrode method
Low-frequency ac electric current I caused by hand generator, the voltage U between grounding body and voltage pole is measured, according to ohm
Law R=U/I, calculate the grounding resistance of tested grounding body.But this method, which has measurement every time, will make a call to two auxiliarily
The shortcomings that pole.Labor intensity is added, many scenes can not even beat auxiliary earth polar；This method can not find to be present in draw under
The positions such as line, each connection are because the situation of corrosion or loose contact.
Method two：Split-core type meter method
Split-core type meter method is the improvement to traditional ground resistance measurement method, as long as being clamped with split-core type meter under overhead line structures grounding lead
Line, with regard to grounding resistance can be surveyed.But the result for clamping meter method for measuring can introduce certain original reason error.Influence factor includes：Connect
Ground form, lightning conducter form, lightning-arrest line length, measurement frequency.Secondly, it is not suitable for the shaft tower of more downlead earthing types.
In order to which solve antitheft and down conductor is reliably connected problem, the bolt of partial earthing line connecting plate is all changed to
Directly weld, and the mode of this welding earth stud makes the measurement of three electrode method and split-core type meter method run into very big difficulty.
Patent such as entitled release-free electric cable tower ground resistance measuring method and its device (Patent No. 96120774.4) carries
A kind of method gone out, its object is to provide one kind to untie electric tower down conductor and electric tower tie point, you can measure electricity
The method for fast measuring and device of tower ground resistance.This method is that pincerlike transformer is vised more with down conductor, the ground resistance of survey
Value, although realizing the function of exempting to solve line, set environment for electric pylon and have higher requirements：It is more inclined for residing region
Far, and the higher more dangerously steep electric tower of physical features, operating personnel can not directly measure, and be not easy to carry out the electric tower of manual measurement more
Easily there is the hidden danger that hits a mine, suitable emphasis monitoring excludes hidden danger.
Also the two of shaft tower left and right ends are connected on respectively using four pairs of voltage transformer summation current transformers using split-core type meter method
On bar lightning protection line, voltage signal is sensed to lightning protection line, collection measurement current signal by voltage transformer and simultaneously put by filtering
It is big to wait signal transacting link, the relation of feedback current and induced voltage is obtained, eventually through specific computational methods, is tested
The grounding resistance resistance of shaft tower.Although this method overcomes tester in existing method of Testing Earth-Contact Resistance to reach test
Scene and the problem of must the unnecessary downlead of shaft tower be untied, but hang over due to pincers voltage transformer and electric current on lightning protection line
Presence gap between transformer and lightning protection line, measuring environment is larger by natural environment influence, causes to deposit between one group of measured value
In relative error.
The content of the invention
In view of the shortcomings of the prior art, the present invention proposes comprehensive detection system and the side of a kind of transmission line of electricity earthed system
Method, its can the relevant Lightning-Protected Grounding of Transmission Line performance of comprehensive detection, provided safeguard for the safe operation of power network.
The present invention solves its technical problem and adopted the technical scheme that：
On the one hand, a kind of comprehensive detection system of transmission line of electricity earthed system provided in an embodiment of the present invention includes ground connection electricity
Hinder test device and eight annular voltage transformers being connected respectively with earth resistance device and eight ring currents are mutual
Sensor, described eight annular voltage transformers and eight ring current transformers are separately positioned on four down conductors of shaft tower
And on the overhead ground wire of shaft tower left and right ends, and annular voltage transformer and ring current transformer in pairs and are disposed adjacent；
The annular voltage transformer being arranged on the overhead ground wire of shaft tower left and right ends is used to apply voltage on overhead ground wire, if
The voltage signal for putting annular voltage transformer collection four down conductors of shaft tower on four down conductors of shaft tower is concurrent
Earth resistance device is given, the ring current transformer gathers four down conductors of shaft tower and shaft tower or so two respectively
Eight groups of current signals of the overhead ground wire at end are simultaneously sent to earth resistance device, and the earth resistance device is to eight
Group voltage signal and current signal be calculated the contact resistance resistance of tested shaft tower transmission line of electricity earthed system.
As a kind of possible implementation of the present embodiment, the earth resistance device includes MCU, mould occurs for signal
Block, the first Current Voltage modular converter, signal amplification module, signal selection module, power amplifier module, the second Current Voltage turn
Change the mold block, filtration module, range handover module, AC-DC conversion module, the first AD conversion module, display module, GPRS module,
Second AD conversion module and power module, the MCU is successively by signal generating module, the first Current Voltage modular converter, letter
Number amplification module, signal selection module and power amplifier module and the annular being arranged on the overhead ground wire of shaft tower left and right ends
Voltage transformer is connected, and eight ring current transformers are successively by the second Current Voltage modular converter, filtration module, amount
Journey handover module, AC-DC conversion module and the first AD conversion module are connected with MCU, described to be arranged under four grounding leads of shaft tower
Annular voltage transformer on line is connected by the second AD conversion module with MCU, and the power module fills for earth resistance
Offer stable operating voltage is provided；
Wherein, the MCU control signals generation module sends sinusoidal ac signal and by the first Current Voltage modulus of conversion
Block, the output of signal amplification module determine the sinusoidal ac signal of magnitude of voltage, then by signal selection module by different magnitudes of voltage
Distribute to overhead ground wire Shang No. tetra- voltage transformers for being arranged on shaft tower left and right ends and export in branch road, while put by power
The load driving force of big module raising circuit is arranged on the roads of overhead ground wire Shang tetra- electricity of shaft tower left and right ends so as to drive
Press transformer；When overhead ground wire Shang No. tetra- voltage transformers by being arranged on shaft tower left and right ends are sensed to shaft tower or so two
On the overhead ground wire at end during voltage signal, electric current should be produced in tested loop, by eight ring current transformers respectively by eight
Road current signal detects, and is converted to magnitude of voltage by the second Current Voltage modular converter, then is filtered by filtration module, root
Range is selected by range handover module according to measured size, then DC quantity is converted to by AC-DC conversion module and measures it
Size, be converted to digital quantity by the first AD conversion module and be sent into MCU, meanwhile, it is arranged on four down conductors of shaft tower
The voltage signal of annular voltage transformer collection four down conductors of shaft tower is simultaneously converted to numeral by the second AD conversion module
Amount is sent into MCU；MCU is carried out tested shaft tower transmission line of electricity earthed system is calculated and connect to eight groups of voltage signals and current signal
Point resistance is simultaneously shown by display module and sent by GPRS module to the host computer of remote monitoring center.
As a kind of possible implementation of the present embodiment, the earth resistance device also includes serial port module, institute
State serial port module and be used for adjusting parameter and program.
As a kind of possible implementation of the present embodiment, the earth resistance device also includes clock module, institute
Clock module is stated to be used to determine system time.
As a kind of possible implementation of the present embodiment, the earth resistance device also includes memory module, institute
Memory module is stated to be used to store the related data and grounding resistance measurement result during earth resistance.
On the other hand, the method for comprehensive detection of a kind of transmission line of electricity earthed system provided in an embodiment of the present invention, in utilization
State described comprehensive detection system to test the contact resistance of transmission line of electricity earthed system, detailed process includes following step
Suddenly：
Step 1, eight pairs of voltage transformer summation current transformers are separately mounted to two lightning conducters of shaft tower left and right ends
On upper and down conductor, and it is attached with earth resistance device；
Step 2, earth resistance device is mutual to four voltages on two lightning protection lines of shaft tower left and right ends
Sensor sends sine voltage signal, and this alternating voltage is sensed to lightning conducter；
Step 3, eight current transformers sense to obtain the electric current in lightning conducter and down conductor and are sent into grounding resistance
Test device；
Step 4, second is carried out after certain interval of time to test, four voltage transformers on down conductor
Sensing obtains the voltage in voltage transformer and is sent into earth resistance device, at the same time, eight current transformer sensings
Obtain the electric current in lightning conducter and down conductor and be sent into earth resistance device；
Step 5, earth resistance device according to sensing to four voltage signals on lightning conducter and collection voltage and
Current signal carries out that grounding resistance resistance is calculated.
As a kind of possible implementation of the present embodiment, the detailed process of the step 2 is：MCU control signals occur
Module sends sinusoidal ac signal and is determining magnitude of voltage just by the first Current Voltage modular converter, the output of signal amplification module
String AC signal, then distributed different magnitudes of voltage to two lightning protection installed in shaft tower left and right ends by signal selection module
In four voltage transformers output branch road on line, while the load driving force of circuit is improved so as to driving by power amplifier module
Dynamic four voltage transformers on two lightning protection lines of shaft tower left and right ends sense alternating voltage to corresponding lightning-arrest
On line.
As a kind of possible implementation of the present embodiment, eight current transformers sense to obtain lightning conducter and ground connection
Electric current in downlead is simultaneously sent into the detailed process of earth resistance device and is：Eight current transformers are respectively by eight road electric currents
Signal detection goes out, and is converted to magnitude of voltage by the second Current Voltage modular converter, then is filtered by filtration module, according to tested
Measure size and range selected by range handover module, then DC quantity is converted to by AC-DC conversion module and measures its size,
Digital quantity, which is converted to, by the first AD conversion module is sent into MCU.
As a kind of possible implementation of the present embodiment, four voltage transformers on down conductor
Sensing obtains the voltage in voltage transformer and is sent into the detailed process of earth resistance device：Installed in down conductor
On four voltage transformers collection down conductor voltage signal and be converted to digital quantity by the second AD conversion module and give
Enter MCU.
As a kind of possible implementation of the present embodiment, in steps of 5, the specific mistake of grounding resistance resistance is calculated
Cheng Wei：
If RegFor tested pole tower ground resistance impedance value, ZLFor all shaft tower parallel equivalent resistance impedance values in left side, ZRFor
All shaft tower parallel equivalent resistance impedance values in right side, Z1And Z2It is respectively tested two aerial between shaft tower and left side first order shaft tower
Lightning conducter equivalent resistance impedance value, Z3And Z4Respectively tested two overhead ground wires between shaft tower and right side first order shaft tower are equivalent
Resistive impedance value, Z5、Z6、Z7、Z8Respectively four down conductor equivalent resistances, ZegFor four down conductor parallel connections etc.
Imitate resistance；
When measure for the first time, pass through voltage transformer pt1~PT4The voltage applied on to lightning conducter is,The current data of eight current transformer measurements is simultaneously Produced to be measured using current transformer in corresponding overhead ground wire branch road
Raw electric current, can obtain following matrix equation：
Wherein, unknown number has Z1、Z2、Z3、Z4、ZL、ZR、Reg、ZegTotally 8；
When carrying out second of measurement, pass through voltage transformer pt5~PT8The voltage of measurement is
At the same time, corresponded to using 4 overhead ground wires 4 and down conductor of current transformer measurement current generated in branch road
For：
By I5Z5=I6Z6=I7Z7=I8Z8(4 down conductor resistor coupled in parallel)：
And Zeg=Z5//Z6//Z7//Z8
Simultaneous Equations (1) and (2) are understood：
Unknown number has Z1、Z2、Z3、Z4、ZL、ZR、Reg、Z5Totally 8, and meeting
Under conditions of, solution of equations presence is simultaneously unique；
Solve equation group and obtain circuit parameter Reg。
The technical scheme of the embodiment of the present invention can have the advantage that as follows：
On the one hand, technical scheme of the embodiment of the present invention divides eight annular voltage transformers and eight ring current transformers
It is not arranged on four down conductors of shaft tower and the overhead ground wire of shaft tower left and right ends, and annular voltage transformer and annular
Current transformer is paired and is disposed adjacent；The annular voltage transformer being arranged on the overhead ground wire of shaft tower left and right ends is used for
Apply voltage on to overhead ground wire, annular voltage transformer four, the shaft tower of collection being arranged on four down conductors of shaft tower
The voltage signal of down conductor is simultaneously sent to earth resistance device, and the ring current transformer gathers shaft tower four respectively
Eight groups of current signals of bar down conductor and the overhead ground wire of shaft tower left and right ends are simultaneously sent to earth resistance device,
The earth resistance device carries out that tested shaft tower transmission line of electricity ground connection is calculated to eight groups of voltage signals and current signal
The contact resistance resistance of system.Using four down conductors of shaft tower and overhead ground wire simultaneously as measurement point, using multigroup mutual
Sensor measures, for comprehensive detection tower body and grounding body resistance.
On the one hand, eight pairs of voltage transformer summation current transformers are separately mounted to by technical scheme of the embodiment of the present invention first
On two lightning conducters of shaft tower left and right ends and on down conductor, and it is attached with earth resistance device；Next connects
Ground resistance test device sends sinusoidal voltage to four voltage transformers on two lightning protection lines of shaft tower left and right ends
Signal, and this alternating voltage is sensed to lightning conducter；Then eight current transformers sense to obtain under lightning conducter and grounding lead
Electric current in line is simultaneously sent into earth resistance device；Furthermore carry out testing for second after certain interval of time, installed in ground connection
Four voltage transformers on downlead sense to obtain the voltage in voltage transformer and are sent into earth resistance device, with this
Meanwhile eight current transformers sense to obtain the electric current in lightning conducter and down conductor and are sent into earth resistance device；
Last earth resistance device enters according to the voltage and current signal of sensing to four voltage signals on lightning conducter and collection
Grounding resistance resistance is calculated in row.Using four down conductors of shaft tower and overhead ground wire simultaneously as measurement point, using more
The method of group transformer measurement, for comprehensive detection tower body and grounding body resistance.
Technical scheme of the embodiment of the present invention realizes the function that remotely can quickly measure tower body and grounding body resistance, significantly
Reduce tester and carry out the workload of field survey, and this device achieves that exempt to tear function open, without untiing unnecessary draw
Offline (shaft tower containing any a plurality of downlead), substantially increases monitoring efficiency.In addition, technical scheme of the embodiment of the present invention is also
The function of overhead ground wire and the dual measurement of down conductor is realized, has been ensured in the case of one group of equipment failure, normally
Monitor shaft tower lightning protection properties.Every group of transformer measurable downlead or overhead ground wire resistance when working independently, from algorithm to the greatest extent
Calculation error may be reduced, and avoid the error of transformer link as far as possible.The data of measurement are stored, establish transmission line of electricity lightning protection
System comprehensive management platform, establish lightning protection early warning expert system.
Brief description of the drawings
Fig. 1 is a kind of signal of the comprehensive detection system of transmission line of electricity earthed system according to an exemplary embodiment
Figure；
Fig. 2 is a kind of specific installation signal of voltage transformer summation current transformer according to an exemplary embodiment
Figure；
Fig. 3 is a kind of schematic diagram of earth resistance device according to an exemplary embodiment；
Fig. 4 is a kind of flow of the method for comprehensive detection of transmission line of electricity earthed system according to an exemplary embodiment
Figure；
Fig. 5 is a kind of schematic diagram of grounding resistance measurement equivalent circuit according to an exemplary embodiment.
Embodiment
For the technical characterstic for illustrating this programme can be understood, below by embodiment, and its accompanying drawing is combined, to this hair
It is bright to be described in detail.Following disclosure provides many different embodiments or example is used for realizing the different knots of the present invention
Structure.In order to simplify disclosure of the invention, hereinafter the part and setting of specific examples are described.In addition, the present invention can be with
Repeat reference numerals and/or letter in different examples.This repetition is that for purposes of simplicity and clarity, itself is not indicated
Relation between various embodiments are discussed and/or set.It should be noted that part illustrated in the accompanying drawings is not necessarily to scale
Draw.Present invention omits the description to known assemblies and treatment technology and process to avoid being unnecessarily limiting the present invention.
Fig. 1 is a kind of signal of the comprehensive detection system of transmission line of electricity earthed system according to an exemplary embodiment
Figure.As depicted in figs. 1 and 2, a kind of comprehensive detection system of transmission line of electricity earthed system provided in an embodiment of the present invention includes connecing
Ground resistance test device 1 and eight annular voltage transformers 2 (2-1 and 2-2) being connected respectively with earth resistance device
With eight ring current transformers 3, described eight annular voltage transformers and eight ring current transformers are separately positioned on
On four down conductors 6 of shaft tower 4 and the overhead ground wire 5 of the left and right ends of shaft tower 4, and annular voltage transformer and annular electro
Current transformer is paired and is disposed adjacent；The annular voltage transformer PT1- being arranged on the overhead ground wire of the left and right ends of shaft tower 4
PT4 is used to apply voltage on overhead ground wire, the annular voltage transformer PT5- being arranged on four down conductors of shaft tower
The voltage signal of PT8 collection four down conductors of shaft tower is simultaneously sent to earth resistance device, the ring current mutual inductance
Device CT1-CT8 gathers eight groups of current signals of four down conductors of shaft tower and the overhead ground wire of shaft tower left and right ends simultaneously respectively
Earth resistance device is sent to, the earth resistance device to eight groups of voltage signals and current signal calculate
To the contact resistance resistance of tested shaft tower transmission line of electricity earthed system.
Using four down conductors of shaft tower and overhead ground wire simultaneously as measurement point, surveyed using multigroup transformer
Amount, for comprehensive detection tower body and grounding body resistance.
In a kind of possible implementation, as shown in figure 3, the earth resistance device includes MCU, signal occurs
Module, the first Current Voltage modular converter, signal amplification module, signal selection module, power amplifier module, the second Current Voltage
Modular converter, filtration module, range handover module, AC-DC conversion module, the first AD conversion module, display module, GPRS moulds
Block, the second AD conversion module and power module, the MCU successively by signal generating module, the first Current Voltage modular converter,
Signal amplification module, signal selection module and power amplifier module are respectively with being arranged on the overhead ground wire of shaft tower left and right ends
Annular voltage transformer PT1-PT4 be connected, eight ring current transformer CT1-CT8 pass through the second electric current successively respectively
Voltage transformation module, filtration module, range handover module, AC-DC conversion module and the first AD conversion module are connected with MCU, institute
State the annular voltage transformer PT5-PT8 being arranged on four down conductors of shaft tower respectively by the second AD conversion module with
MCU is connected, and the power module provides stable operating voltage for earth resistance device；
Wherein, the MCU control signals generation module sends sinusoidal ac signal and by the first Current Voltage modulus of conversion
Block, the output of signal amplification module determine the sinusoidal ac signal of magnitude of voltage, then by signal selection module by different magnitudes of voltage
Distribute to overhead ground wire Shang No. tetra- voltage transformers for being arranged on shaft tower left and right ends and export in branch road, while put by power
The load driving force of big module raising circuit is arranged on the roads of overhead ground wire Shang tetra- electricity of shaft tower left and right ends so as to drive
Press transformer；When overhead ground wire Shang No. tetra- voltage transformers by being arranged on shaft tower left and right ends are sensed to shaft tower or so two
On the overhead ground wire at end during voltage signal, electric current should be produced in tested loop, by eight ring current transformers respectively by eight
Road current signal detects, and is converted to magnitude of voltage by the second Current Voltage modular converter, then is filtered by filtration module, root
Range is selected by range handover module according to measured size, then DC quantity is converted to by AC-DC conversion module and measures it
Size, be converted to digital quantity by the first AD conversion module and be sent into MCU, meanwhile, it is arranged on four down conductors of shaft tower
The voltage signal of annular voltage transformer collection four down conductors of shaft tower is simultaneously converted to numeral by the second AD conversion module
Amount is sent into MCU；MCU is carried out tested shaft tower transmission line of electricity earthed system is calculated and connect to eight groups of voltage signals and current signal
Point resistance is simultaneously shown by display module and sent by GPRS module to the host computer of remote monitoring center.
In a kind of possible implementation, the earth resistance device also includes serial port module, the serial ports mould
Block is used for adjusting parameter and program.
In a kind of possible implementation, the earth resistance device also includes clock module, the clock mould
Block is used to determine system time.
In a kind of possible implementation, the earth resistance device also includes memory module, the storage mould
Block is used to store the related data and grounding resistance measurement result during earth resistance.
The present embodiment realizes the function that remotely can quickly measure tower body and grounding body resistance, greatly reduces tester
Member carries out the workload of field survey, and this device achieves that exempts to tear function open, without untiing unnecessary downlead (containing any
The shaft tower of a plurality of downlead), substantially increase monitoring efficiency.In addition, this implementation is also achieved under overhead ground wire and grounding lead
The function of the dual measurement of line, ensure in the case of one group of equipment failure, it is normal to monitor shaft tower lightning protection properties.Every group of transformer
Measurable downlead or overhead ground wire resistance, reduces calculation error, and keep away as far as possible as far as possible from algorithm when working independently
Exempt from the error of transformer link.The data of measurement are stored, transmission line of electricity lightning-protection system comprehensive management platform is established, it is pre- to establish lightning protection
Alert expert system, provides safeguard for the safe operation of power network.
Fig. 4 is a kind of flow of the method for comprehensive detection of transmission line of electricity earthed system according to an exemplary embodiment
Figure.As shown in figure 4, a kind of method for comprehensive detection of transmission line of electricity earthed system provided in an embodiment of the present invention, utilizes above-mentioned institute
The comprehensive detection system stated is tested the contact resistance of transmission line of electricity earthed system, and detailed process comprises the following steps：
Step 1, eight pairs of voltage transformer summation current transformers are separately mounted to two lightning conducters of shaft tower left and right ends
On upper and down conductor, and it is attached with earth resistance device；
Step 2, earth resistance device is mutual to four voltages on two lightning protection lines of shaft tower left and right ends
Sensor sends sine voltage signal, and this alternating voltage is sensed to lightning conducter；
Step 3, eight current transformers sense to obtain the electric current in lightning conducter and down conductor and are sent into grounding resistance
Test device；
Step 4, second is carried out after certain interval of time to test, four voltage transformers on down conductor
Sensing obtains the voltage in voltage transformer and is sent into earth resistance device, at the same time, eight current transformer sensings
Obtain the electric current in lightning conducter and down conductor and be sent into earth resistance device；
Step 5, earth resistance device according to sensing to four voltage signals on lightning conducter and collection voltage and
Current signal carries out that grounding resistance resistance is calculated.
After calculating grounding resistance resistance, earth resistance device is simultaneously stored related data and by showing mould
Block shows and sent by GPRS module to the host computer of remote monitoring center.
In a kind of possible implementation, the detailed process of the step 2 is：MCU control signals occur module and sent
Sinusoidal ac signal simultaneously determines that the simple alternating current of magnitude of voltage is believed by the first Current Voltage modular converter, the output of signal amplification module
Number, then distributed different magnitudes of voltage to four on two lightning protection lines of shaft tower left and right ends by signal selection module
In individual voltage transformer output branch road, while the load driving force of circuit is improved so as to which drive installation exists by power amplifier module
Four voltage transformers on two lightning protection lines of shaft tower left and right ends sense alternating voltage to corresponding lightning conducter.
In a kind of possible implementation, eight current transformers sense to obtain in lightning conducter and down conductor
Electric current and be sent into the detailed process of earth resistance device and be：Eight current transformers are respectively by eight road current signal detections
Go out, and magnitude of voltage is converted to by the second Current Voltage modular converter, then filtered by filtration module, led to according to measured size
Range handover module selection range is crossed, then DC quantity is converted to by AC-DC conversion module and measures its size, by first
AD conversion module is converted to digital quantity and is sent into MCU.
In a kind of possible implementation, four voltage transformers on down conductor sense to obtain
Voltage in voltage transformer is simultaneously sent into the detailed process of earth resistance device and is：Four on down conductor
The voltage signal of voltage transformer collection down conductor is simultaneously converted to digital quantity feeding MCU by the second AD conversion module.
In a kind of possible implementation, in steps of 5, the detailed process that grounding resistance resistance is calculated is：
If RegFor tested pole tower ground resistance impedance value, ZLFor all shaft tower parallel equivalent resistance impedance values in left side, ZRFor
All shaft tower parallel equivalent resistance impedance values in right side, Z1And Z2It is respectively tested two aerial between shaft tower and left side first order shaft tower
Lightning conducter equivalent resistance impedance value, Z3And Z4Respectively tested two overhead ground wires between shaft tower and right side first order shaft tower are equivalent
Resistive impedance value, Z5、Z6、Z7、Z8Respectively four down conductor equivalent resistances, ZegFor four down conductor parallel connections etc.
Imitate resistance；As shown in Figure 5.
When measure for the first time, pass through voltage transformer pt1~PT4The voltage applied on to lightning conducter is,The current data of eight current transformer measurements is simultaneously Produced to be measured using current transformer in corresponding overhead ground wire branch road
Raw electric current, can obtain following matrix equation：
Wherein, unknown number has Z1、Z2、Z3、Z4、ZL、ZR、Reg、ZegTotally 8；
When carrying out second of measurement, pass through voltage transformer pt5~PT8The voltage of measurement is
At the same time, corresponded to using 4 overhead ground wires 4 and down conductor of current transformer measurement current generated in branch road
For：
By I5Z5=I6Z6=I7Z7=I8Z8(4 down conductor resistor coupled in parallel, therefore I5Z5=I6Z6=I7Z7=I8Z8)
：
And Zeg=Z5//Z6//Z7//Z8
Simultaneous Equations (1) and (2) are understood：
Unknown number has Z1、Z2、Z3、Z4、ZL、ZR、Reg、Z5Totally 8, and meeting
Under conditions of, solution of equations exists and is unique；
Solve equation group and obtain circuit parameter Reg。
The present embodiment realizes the function that remotely can quickly measure tower body and grounding body resistance, greatly reduces tester
Member carries out the workload of field survey, and this device achieves that exempts to tear function open, without untiing unnecessary downlead (containing any
The shaft tower of a plurality of downlead), substantially increase monitoring efficiency.In addition, this implementation is also achieved under overhead ground wire and grounding lead
The function of the dual measurement of line, ensure in the case of one group of equipment failure, it is normal to monitor shaft tower lightning protection properties.Every group of transformer
Measurable downlead or overhead ground wire resistance, reduces calculation error, and keep away as far as possible as far as possible from algorithm when working independently
Exempt from the error of transformer link.The data of measurement are stored, transmission line of electricity lightning-protection system comprehensive management platform is established, it is pre- to establish lightning protection
Alert expert system, provides safeguard for the safe operation of power network.
The present invention using eight couples of voltage transformer pt summation current transformer CT be connected on respectively two of shaft tower left and right ends it is anti-
On thunder line and on down conductor, sensed by voltage transformer to tested one specific voltage signal of shaft tower, while by electric current
The transformer measurement now electric current in lightning conducter and its down conductor, and voltage is converted to by Current Voltage modular converter
Value, then filtered by filtration module, range is selected by range handover module according to measured size, then pass through AC-DC conversion
Module is converted to DC quantity and measures its size, by AD conversion module be converted to digital quantity be sent into MCU units, obtain voltage with
The relation of electric current, eventually through specific computational methods, the grounding resistance resistance of tested shaft tower is obtained, the program need not consider bar
Tower ground lead quantity, it is applicable to the shaft tower containing any a plurality of downlead.Evaluation system passes through the contrast to two groups of data
And analysis, it is ensured that the precision of tested resistance.Consider to greatest extent and remove electromagnetic interference mistake existing for single overhead ground wire measurement point
Difference and the error caused by voltage (electric current) transformer has contact gap.Consider to greatest extent and remove single down conductor
Measurement point is because ground environment is severe, the larger caused error of Hz noise.
Simply the preferred embodiment of the present invention described above, for those skilled in the art,
Without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications are also regarded as this hair
Bright protection domain.
Claims (10)
1. a kind of comprehensive detection system of transmission line of electricity earthed system, it is characterized in that, including earth resistance device and point
The eight annular voltage transformers and eight ring current transformers not being connected with earth resistance device, described eight rings
Shape voltage transformer and eight ring current transformers are separately positioned on four down conductors of shaft tower and shaft tower left and right ends
On overhead ground wire, and annular voltage transformer and ring current transformer in pairs and are disposed adjacent；It is arranged on shaft tower or so two
Annular voltage transformer on the overhead ground wire at end is used to apply voltage on overhead ground wire, is arranged on four ground connection of shaft tower
The voltage signal of annular voltage transformer collection four down conductors of shaft tower on downlead is simultaneously sent to earth resistance
Device, the ring current transformer gather four down conductors of shaft tower and the overhead ground wire of shaft tower left and right ends respectively
Eight groups of current signals are simultaneously sent to earth resistance device, and the earth resistance device is to eight groups of voltage signals and electric current
Signal be calculated the contact resistance resistance of tested shaft tower transmission line of electricity earthed system.
2. a kind of comprehensive detection system of transmission line of electricity earthed system as claimed in claim 1, it is characterized in that, the ground connection electricity
Hindering test device includes MCU, signal generating module, the first Current Voltage modular converter, signal amplification module, signal behavior mould
Block, power amplifier module, the second Current Voltage modular converter, filtration module, range handover module, AC-DC conversion module,
One AD conversion module, display module, GPRS module, the second AD conversion module and power module, the MCU are sent out by signal successively
Raw module, the first Current Voltage modular converter, signal amplification module, signal selection module and power amplifier module are with being arranged on bar
Annular voltage transformer on the overhead ground wire of tower left and right ends is connected, and eight ring current transformers are successively by the
Two Current Voltage modular converters, filtration module, range handover module, AC-DC conversion module and the first AD conversion module and MCU
It is connected, the annular voltage transformer being arranged on four down conductors of shaft tower passes through the second AD conversion module and MCU phases
Even, the power module provides stable operating voltage for earth resistance device；
Wherein, the MCU control signals generation module sends sinusoidal ac signal and by the first Current Voltage modular converter, letter
The output of number amplification module determines the sinusoidal ac signal of magnitude of voltage, then by signal selection module by different magnitudes of voltage distribute to
It is arranged in overhead ground wire Shang No. tetra- voltage transformer output branch roads of shaft tower left and right ends, while by power amplifier module
The load driving force of raising circuit is arranged on the road mutual induction of voltage of overhead ground wire Shang tetra- of shaft tower left and right ends so as to drive
Device；When overhead ground wire Shang No. tetra- voltage transformers by being arranged on shaft tower left and right ends are sensed to the frame of shaft tower left and right ends
On empty lightning conducter during voltage signal, electric current should be produced in tested loop, by eight ring current transformers respectively by eight road electric currents
Signal detection goes out, and is converted to magnitude of voltage by the second Current Voltage modular converter, then is filtered by filtration module, according to tested
Measure size and range selected by range handover module, then DC quantity is converted to by AC-DC conversion module and measures its size,
Digital quantity, which is converted to, by the first AD conversion module is sent into MCU, meanwhile, the annular electro being arranged on four down conductors of shaft tower
The voltage signal of pressure transformer collection four down conductors of shaft tower is simultaneously converted to digital quantity feeding by the second AD conversion module
MCU；MCU to eight groups of voltage signals and current signal be calculated the contact resistance of tested shaft tower transmission line of electricity earthed system
Resistance is simultaneously shown by display module and sent by GPRS module to the host computer of remote monitoring center.
3. a kind of comprehensive detection system of transmission line of electricity earthed system as claimed in claim 2, it is characterized in that, the ground connection electricity
Resistance test device also includes serial port module, and the serial port module is used for adjusting parameter and program.
4. a kind of comprehensive detection system of transmission line of electricity earthed system as claimed in claim 2, it is characterized in that, the ground connection electricity
Resistance test device also includes clock module, and the clock module is used to determine system time.
5. a kind of comprehensive detection system of transmission line of electricity earthed system as claimed in claim 2, it is characterized in that, the ground connection electricity
Resistance test device also includes memory module, and the memory module is for the related data during storing earth resistance and connects
Ground resistance measurement result.
6. a kind of method for comprehensive detection of transmission line of electricity earthed system, it is characterized in that, utilize the synthesis described in claim 1 to 5
Detecting system is tested the contact resistance of transmission line of electricity earthed system, and detailed process comprises the following steps：
Step 1, eight pairs of voltage transformer summation current transformers are separately mounted on two lightning conducters of shaft tower left and right ends and
On down conductor, and it is attached with earth resistance device；
Step 2, earth resistance device is to four voltage transformers on two lightning protection lines of shaft tower left and right ends
Sine voltage signal is sent, and this alternating voltage is sensed to lightning conducter；
Step 3, eight current transformers sense to obtain the electric current in lightning conducter and down conductor and are sent into earth resistance
Device；
Step 4, second is carried out after certain interval of time to test, four voltage transformers sensing on down conductor
Obtain the voltage in voltage transformer and be sent into earth resistance device, at the same time, eight current transformers sense to obtain
Electric current in lightning conducter and down conductor is simultaneously sent into earth resistance device；
Step 5, earth resistance device is according to sensing to four voltage signals on lightning conducter and the voltage and current gathered
Signal carries out that grounding resistance resistance is calculated.
7. a kind of method for comprehensive detection of transmission line of electricity earthed system as claimed in claim 6, it is characterized in that, the step 2
Detailed process be：MCU control signals occur module and send sinusoidal ac signal and by the first Current Voltage modular converter, letter
The output of number amplification module determines the sinusoidal ac signal of magnitude of voltage, then by signal selection module by different magnitudes of voltage distribute to
In four voltage transformers output branch road on two lightning protection lines of shaft tower left and right ends, while by power amplifier module
The load driving force of circuit is improved so as to four mutual induction of voltage of the drive installation on two lightning protection lines of shaft tower left and right ends
Device senses alternating voltage to corresponding lightning conducter.
8. a kind of method for comprehensive detection of transmission line of electricity earthed system as claimed in claim 6, it is characterized in that, eight electricity
Current transformer senses to obtain the electric current in lightning conducter and down conductor and is sent into the detailed process of earth resistance device：
Eight current transformers respectively detect eight road current signals, and are converted to voltage by the second Current Voltage modular converter
Value, then filtered by filtration module, range is selected by range handover module according to measured size, then pass through AC-DC conversion
Module is converted to DC quantity and measures its size, and being converted to digital quantity by the first AD conversion module is sent into MCU.
9. a kind of method for comprehensive detection of transmission line of electricity earthed system as claimed in claim 6, it is characterized in that, it is described to be arranged on
Four voltage transformers on down conductor sense to obtain the voltage in voltage transformer and are sent into earth resistance device
Detailed process be：The voltage signal and process of four voltage transformers collection down conductor on down conductor
Second AD conversion module is converted to digital quantity and is sent into MCU.
10. a kind of method for comprehensive detection of transmission line of electricity earthed system as described in claim 6-9 any one, its feature
It is that in steps of 5, the detailed process that grounding resistance resistance is calculated is：
If RegFor tested pole tower ground resistance impedance value, ZLFor all shaft tower parallel equivalent resistance impedance values in left side, ZRFor right side institute
There are shaft tower parallel equivalent resistance impedance value, Z1And Z2Respectively tested two overhead ground wires between shaft tower and left side first order shaft tower
Equivalent resistance impedance value, Z3And Z4Respectively tested two overhead ground wire equivalent resistances between shaft tower and right side first order shaft tower hinder
Anti- value, Z5、Z6、Z7、Z8Respectively four down conductor equivalent resistances, ZegFor four down conductor parallel equivalent resistances；
When measure for the first time, pass through voltage transformer pt1~PT4The voltage applied on to lightning conducter is,The current data of eight current transformer measurements is simultaneously To utilize the corresponding overhead ground wire branch road of current transformer measurement
In it is current generated, following matrix equation can be obtained：
<mrow>
<mfenced open = "[" close = "]">
<mtable>
<mtr>
<mtd>
<msub>
<mover>
<mi>I</mi>
<mo>&CenterDot;</mo>
</mover>
<mn>1</mn>
</msub>
</mtd>
<mtd>
<mn>0</mn>
</mtd>
<mtd>
<mn>0</mn>
</mtd>
<mtd>
<mn>0</mn>
</mtd>
<mtd>
<mrow>
<msub>
<mover>
<mi>I</mi>
<mo>&CenterDot;</mo>
</mover>
<mn>1</mn>
</msub>
<mo>+</mo>
<msub>
<mover>
<mi>I</mi>
<mo>&CenterDot;</mo>
</mover>
<mn>2</mn>
</msub>
</mrow>
</mtd>
<mtd>
<mn>0</mn>
</mtd>
<mtd>
<mrow>
<msub>
<mover>
<mi>I</mi>
<mo>&CenterDot;</mo>
</mover>
<mn>1</mn>
</msub>
<mo>+</mo>
<msub>
<mover>
<mi>I</mi>
<mo>&CenterDot;</mo>
</mover>
<mn>2</mn>
</msub>
<mo>+</mo>
<msub>
<mover>
<mi>I</mi>
<mo>&CenterDot;</mo>
</mover>
<mn>3</mn>
</msub>
<mo>+</mo>
<msub>
<mover>
<mi>I</mi>
<mo>&CenterDot;</mo>
</mover>
<mn>4</mn>
</msub>
</mrow>
</mtd>
</mtr>
<mtr>
<mtd>
<mn>0</mn>
</mtd>
<mtd>
<msub>
<mover>
<mi>I</mi>
<mo>&CenterDot;</mo>
</mover>
<mn>2</mn>
</msub>
</mtd>
<mtd>
<mn>0</mn>
</mtd>
<mtd>
<mn>0</mn>
</mtd>
<mtd>
<mrow>
<msub>
<mover>
<mi>I</mi>
<mo>&CenterDot;</mo>
</mover>
<mn>1</mn>
</msub>
<mo>+</mo>
<msub>
<mover>
<mi>I</mi>
<mo>&CenterDot;</mo>
</mover>
<mn>2</mn>
</msub>
</mrow>
</mtd>
<mtd>
<mn>0</mn>
</mtd>
<mtd>
<mrow>
<msub>
<mover>
<mi>I</mi>
<mo>&CenterDot;</mo>
</mover>
<mn>1</mn>
</msub>
<mo>+</mo>
<msub>
<mover>
<mi>I</mi>
<mo>&CenterDot;</mo>
</mover>
<mn>2</mn>
</msub>
<mo>+</mo>
<msub>
<mover>
<mi>I</mi>
<mo>&CenterDot;</mo>
</mover>
<mn>3</mn>
</msub>
<mo>+</mo>
<msub>
<mover>
<mi>I</mi>
<mo>&CenterDot;</mo>
</mover>
<mn>4</mn>
</msub>
</mrow>
</mtd>
</mtr>
<mtr>
<mtd>
<mn>0</mn>
</mtd>
<mtd>
<mn>0</mn>
</mtd>
<mtd>
<msub>
<mover>
<mi>I</mi>
<mo>&CenterDot;</mo>
</mover>
<mn>3</mn>
</msub>
</mtd>
<mtd>
<mn>0</mn>
</mtd>
<mtd>
<mn>0</mn>
</mtd>
<mtd>
<mrow>
<msub>
<mover>
<mi>I</mi>
<mo>&CenterDot;</mo>
</mover>
<mn>3</mn>
</msub>
<mo>+</mo>
<msub>
<mover>
<mi>I</mi>
<mo>&CenterDot;</mo>
</mover>
<mn>4</mn>
</msub>
</mrow>
</mtd>
<mtd>
<mrow>
<msub>
<mover>
<mi>I</mi>
<mo>&CenterDot;</mo>
</mover>
<mn>1</mn>
</msub>
<mo>+</mo>
<msub>
<mover>
<mi>I</mi>
<mo>&CenterDot;</mo>
</mover>
<mn>2</mn>
</msub>
<mo>+</mo>
<msub>
<mover>
<mi>I</mi>
<mo>&CenterDot;</mo>
</mover>
<mn>3</mn>
</msub>
<mo>+</mo>
<msub>
<mover>
<mi>I</mi>
<mo>&CenterDot;</mo>
</mover>
<mn>4</mn>
</msub>
</mrow>
</mtd>
</mtr>
<mtr>
<mtd>
<mn>0</mn>
</mtd>
<mtd>
<mn>0</mn>
</mtd>
<mtd>
<mn>0</mn>
</mtd>
<mtd>
<msub>
<mover>
<mi>I</mi>
<mo>&CenterDot;</mo>
</mover>
<mn>4</mn>
</msub>
</mtd>
<mtd>
<mn>0</mn>
</mtd>
<mtd>
<mrow>
<msub>
<mover>
<mi>I</mi>
<mo>&CenterDot;</mo>
</mover>
<mn>3</mn>
</msub>
<mo>+</mo>
<msub>
<mover>
<mi>I</mi>
<mo>&CenterDot;</mo>
</mover>
<mn>4</mn>
</msub>
</mrow>
</mtd>
<mtd>
<mrow>
<msub>
<mover>
<mi>I</mi>
<mo>&CenterDot;</mo>
</mover>
<mn>1</mn>
</msub>
<mo>+</mo>
<msub>
<mover>
<mi>I</mi>
<mo>&CenterDot;</mo>
</mover>
<mn>2</mn>
</msub>
<mo>+</mo>
<msub>
<mover>
<mi>I</mi>
<mo>&CenterDot;</mo>
</mover>
<mn>3</mn>
</msub>
<mo>+</mo>
<msub>
<mover>
<mi>I</mi>
<mo>&CenterDot;</mo>
</mover>
<mn>4</mn>
</msub>
</mrow>
</mtd>
</mtr>
</mtable>
</mfenced>
<mfenced open = "[" close = "]">
<mtable>
<mtr>
<mtd>
<msub>
<mi>Z</mi>
<mn>1</mn>
</msub>
</mtd>
</mtr>
<mtr>
<mtd>
<msub>
<mi>Z</mi>
<mn>2</mn>
</msub>
</mtd>
</mtr>
<mtr>
<mtd>
<msub>
<mi>Z</mi>
<mn>3</mn>
</msub>
</mtd>
</mtr>
<mtr>
<mtd>
<msub>
<mi>Z</mi>
<mn>4</mn>
</msub>
</mtd>
</mtr>
<mtr>
<mtd>
<msub>
<mi>Z</mi>
<mi>L</mi>
</msub>
</mtd>
</mtr>
<mtr>
<mtd>
<msub>
<mi>Z</mi>
<mi>R</mi>
</msub>
</mtd>
</mtr>
<mtr>
<mtd>
<mrow>
<msub>
<mi>R</mi>
<mrow>
<mi>e</mi>
<mi>g</mi>
</mrow>
</msub>
<mo>+</mo>
<msub>
<mi>Z</mi>
<mrow>
<mi>e</mi>
<mi>g</mi>
</mrow>
</msub>
</mrow>
</mtd>
</mtr>
</mtable>
</mfenced>
<mo>=</mo>
<mfenced open = "[" close = "]">
<mtable>
<mtr>
<mtd>
<msub>
<mover>
<mi>U</mi>
<mo>&CenterDot;</mo>
</mover>
<mn>1</mn>
</msub>
</mtd>
</mtr>
<mtr>
<mtd>
<msub>
<mover>
<mi>U</mi>
<mo>&CenterDot;</mo>
</mover>
<mn>2</mn>
</msub>
</mtd>
</mtr>
<mtr>
<mtd>
<msub>
<mover>
<mi>U</mi>
<mo>&CenterDot;</mo>
</mover>
<mn>3</mn>
</msub>
</mtd>
</mtr>
<mtr>
<mtd>
<msub>
<mover>
<mi>U</mi>
<mo>&CenterDot;</mo>
</mover>
<mn>4</mn>
</msub>
</mtd>
</mtr>
</mtable>
</mfenced>
<mo>-</mo>
<mo>-</mo>
<mo>-</mo>
<mrow>
<mo>(</mo>
<mn>1</mn>
<mo>)</mo>
</mrow>
</mrow>
Wherein, unknown number has Z1、Z2、Z3、Z4、ZL、ZR、Reg、ZegTotally 8；
When carrying out second of measurement, pass through voltage transformer pt5~PT8The voltage of measurement is With this
Meanwhile correspond to using 4 overhead ground wires 4 and down conductor of current transformer measurement and current generated in branch road be：
<mrow>
<mfenced open = "[" close = "]">
<mtable>
<mtr>
<mtd>
<msubsup>
<mover>
<mi>I</mi>
<mo>&CenterDot;</mo>
</mover>
<mn>1</mn>
<mo>&prime;</mo>
</msubsup>
</mtd>
<mtd>
<mn>0</mn>
</mtd>
<mtd>
<mn>0</mn>
</mtd>
<mtd>
<mn>0</mn>
</mtd>
<mtd>
<msubsup>
<mover>
<mi>I</mi>
<mo>&CenterDot;</mo>
</mover>
<mn>5</mn>
<mo>&prime;</mo>
</msubsup>
</mtd>
<mtd>
<mn>0</mn>
</mtd>
<mtd>
<mn>0</mn>
</mtd>
<mtd>
<mn>0</mn>
</mtd>
<mtd>
<mrow>
<msubsup>
<mover>
<mi>I</mi>
<mo>&CenterDot;</mo>
</mover>
<mn>1</mn>
<mo>&prime;</mo>
</msubsup>
<mo>+</mo>
<msubsup>
<mover>
<mi>I</mi>
<mo>&CenterDot;</mo>
</mover>
<mn>2</mn>
<mo>&prime;</mo>
</msubsup>
</mrow>
</mtd>
<mtd>
<mtable>
<mtr>
<mtd>
<mn>0</mn>
</mtd>
<mtd>
<mrow>
<msubsup>
<mover>
<mi>I</mi>
<mo>&CenterDot;</mo>
</mover>
<mn>5</mn>
<mo>&prime;</mo>
</msubsup>
<mo>+</mo>
<msubsup>
<mover>
<mi>I</mi>
<mo>&CenterDot;</mo>
</mover>
<mn>6</mn>
<mo>&prime;</mo>
</msubsup>
<mo>+</mo>
<msubsup>
<mover>
<mi>I</mi>
<mo>&CenterDot;</mo>
</mover>
<mn>7</mn>
<mo>&prime;</mo>
</msubsup>
<mo>+</mo>
<msubsup>
<mover>
<mi>I</mi>
<mo>&CenterDot;</mo>
</mover>
<mn>8</mn>
<mo>&prime;</mo>
</msubsup>
</mrow>
</mtd>
</mtr>
</mtable>
</mtd>
</mtr>
<mtr>
<mtd>
<mn>0</mn>
</mtd>
<mtd>
<msubsup>
<mover>
<mi>I</mi>
<mo>&CenterDot;</mo>
</mover>
<mn>2</mn>
<mo>&prime;</mo>
</msubsup>
</mtd>
<mtd>
<mn>0</mn>
</mtd>
<mtd>
<mn>0</mn>
</mtd>
<mtd>
<mn>0</mn>
</mtd>
<mtd>
<msubsup>
<mover>
<mi>I</mi>
<mo>&CenterDot;</mo>
</mover>
<mn>6</mn>
<mo>&prime;</mo>
</msubsup>
</mtd>
<mtd>
<mn>0</mn>
</mtd>
<mtd>
<mn>0</mn>
</mtd>
<mtd>
<mrow>
<msubsup>
<mover>
<mi>I</mi>
<mo>&CenterDot;</mo>
</mover>
<mn>1</mn>
<mo>&prime;</mo>
</msubsup>
<mo>+</mo>
<msubsup>
<mover>
<mi>I</mi>
<mo>&CenterDot;</mo>
</mover>
<mn>2</mn>
<mo>&prime;</mo>
</msubsup>
</mrow>
</mtd>
<mtd>
<mtable>
<mtr>
<mtd>
<mn>0</mn>
</mtd>
<mtd>
<mrow>
<msubsup>
<mover>
<mi>I</mi>
<mo>&CenterDot;</mo>
</mover>
<mn>5</mn>
<mo>&prime;</mo>
</msubsup>
<mo>+</mo>
<msubsup>
<mover>
<mi>I</mi>
<mo>&CenterDot;</mo>
</mover>
<mn>6</mn>
<mo>&prime;</mo>
</msubsup>
<mo>+</mo>
<msubsup>
<mover>
<mi>I</mi>
<mo>&CenterDot;</mo>
</mover>
<mn>7</mn>
<mo>&prime;</mo>
</msubsup>
<mo>+</mo>
<msubsup>
<mover>
<mi>I</mi>
<mo>&CenterDot;</mo>
</mover>
<mn>8</mn>
<mo>&prime;</mo>
</msubsup>
</mrow>
</mtd>
</mtr>
</mtable>
</mtd>
</mtr>
<mtr>
<mtd>
<mn>0</mn>
</mtd>
<mtd>
<mn>0</mn>
</mtd>
<mtd>
<msubsup>
<mover>
<mi>I</mi>
<mo>&CenterDot;</mo>
</mover>
<mn>3</mn>
<mo>&prime;</mo>
</msubsup>
</mtd>
<mtd>
<mn>0</mn>
</mtd>
<mtd>
<mn>0</mn>
</mtd>
<mtd>
<mn>0</mn>
</mtd>
<mtd>
<msubsup>
<mover>
<mi>I</mi>
<mo>&CenterDot;</mo>
</mover>
<mn>7</mn>
<mo>&prime;</mo>
</msubsup>
</mtd>
<mtd>
<mn>0</mn>
</mtd>
<mtd>
<mn>0</mn>
</mtd>
<mtd>
<mrow>
<msubsup>
<mover>
<mi>I</mi>
<mo>&CenterDot;</mo>
</mover>
<mn>3</mn>
<mo>&prime;</mo>
</msubsup>
<mo>+</mo>
<msubsup>
<mover>
<mi>I</mi>
<mo>&CenterDot;</mo>
</mover>
<mn>4</mn>
<mo>&prime;</mo>
</msubsup>
<msubsup>
<mover>
<mi>I</mi>
<mo>&CenterDot;</mo>
</mover>
<mn>5</mn>
<mo>&prime;</mo>
</msubsup>
<mo>+</mo>
<msubsup>
<mover>
<mi>I</mi>
<mo>&CenterDot;</mo>
</mover>
<mn>6</mn>
<mo>&prime;</mo>
</msubsup>
<mo>+</mo>
<msubsup>
<mover>
<mi>I</mi>
<mo>&CenterDot;</mo>
</mover>
<mn>7</mn>
<mo>&prime;</mo>
</msubsup>
<mo>+</mo>
<msubsup>
<mover>
<mi>I</mi>
<mo>&CenterDot;</mo>
</mover>
<mn>8</mn>
<mo>&prime;</mo>
</msubsup>
</mrow>
</mtd>
</mtr>
<mtr>
<mtd>
<mn>0</mn>
</mtd>
<mtd>
<mn>0</mn>
</mtd>
<mtd>
<mn>0</mn>
</mtd>
<mtd>
<msubsup>
<mover>
<mi>I</mi>
<mo>&CenterDot;</mo>
</mover>
<mn>4</mn>
<mo>&prime;</mo>
</msubsup>
</mtd>
<mtd>
<mn>0</mn>
</mtd>
<mtd>
<mn>0</mn>
</mtd>
<mtd>
<mn>0</mn>
</mtd>
<mtd>
<msubsup>
<mover>
<mi>I</mi>
<mo>&CenterDot;</mo>
</mover>
<mn>8</mn>
<mo>&prime;</mo>
</msubsup>
</mtd>
<mtd>
<mn>0</mn>
</mtd>
<mtd>
<mrow>
<msubsup>
<mover>
<mi>I</mi>
<mo>&CenterDot;</mo>
</mover>
<mn>3</mn>
<mo>&prime;</mo>
</msubsup>
<mo>+</mo>
<msubsup>
<mover>
<mi>I</mi>
<mo>&CenterDot;</mo>
</mover>
<mn>4</mn>
<mo>&prime;</mo>
</msubsup>
<msubsup>
<mover>
<mi>I</mi>
<mo>&CenterDot;</mo>
</mover>
<mn>5</mn>
<mo>&prime;</mo>
</msubsup>
<mo>+</mo>
<msubsup>
<mover>
<mi>I</mi>
<mo>&CenterDot;</mo>
</mover>
<mn>6</mn>
<mo>&prime;</mo>
</msubsup>
<mo>+</mo>
<msubsup>
<mover>
<mi>I</mi>
<mo>&CenterDot;</mo>
</mover>
<mn>7</mn>
<mo>&prime;</mo>
</msubsup>
<mo>+</mo>
<msubsup>
<mover>
<mi>I</mi>
<mo>&CenterDot;</mo>
</mover>
<mn>8</mn>
<mo>&prime;</mo>
</msubsup>
</mrow>
</mtd>
</mtr>
</mtable>
</mfenced>
<mfenced open = "[" close = "]">
<mtable>
<mtr>
<mtd>
<msub>
<mi>Z</mi>
<mn>1</mn>
</msub>
</mtd>
</mtr>
<mtr>
<mtd>
<msub>
<mi>Z</mi>
<mn>2</mn>
</msub>
</mtd>
</mtr>
<mtr>
<mtd>
<msub>
<mi>Z</mi>
<mn>3</mn>
</msub>
</mtd>
</mtr>
<mtr>
<mtd>
<msub>
<mi>Z</mi>
<mn>4</mn>
</msub>
</mtd>
</mtr>
<mtr>
<mtd>
<msub>
<mi>Z</mi>
<mn>5</mn>
</msub>
</mtd>
</mtr>
<mtr>
<mtd>
<msub>
<mi>Z</mi>
<mn>6</mn>
</msub>
</mtd>
</mtr>
<mtr>
<mtd>
<msub>
<mi>Z</mi>
<mn>7</mn>
</msub>
</mtd>
</mtr>
<mtr>
<mtd>
<msub>
<mi>Z</mi>
<mn>8</mn>
</msub>
</mtd>
</mtr>
<mtr>
<mtd>
<msub>
<mi>Z</mi>
<mi>L</mi>
</msub>
</mtd>
</mtr>
<mtr>
<mtd>
<msub>
<mi>Z</mi>
<mi>R</mi>
</msub>
</mtd>
</mtr>
<mtr>
<mtd>
<msub>
<mi>R</mi>
<mrow>
<mi>e</mi>
<mi>g</mi>
</mrow>
</msub>
</mtd>
</mtr>
</mtable>
</mfenced>
<mo>=</mo>
<mfenced open = "[" close = "]">
<mtable>
<mtr>
<mtd>
<msub>
<mover>
<mi>U</mi>
<mo>&CenterDot;</mo>
</mover>
<mn>5</mn>
</msub>
</mtd>
</mtr>
<mtr>
<mtd>
<msub>
<mover>
<mi>U</mi>
<mo>&CenterDot;</mo>
</mover>
<mn>6</mn>
</msub>
</mtd>
</mtr>
<mtr>
<mtd>
<msub>
<mover>
<mi>U</mi>
<mo>&CenterDot;</mo>
</mover>
<mn>7</mn>
</msub>
</mtd>
</mtr>
<mtr>
<mtd>
<msub>
<mover>
<mi>U</mi>
<mo>&CenterDot;</mo>
</mover>
<mn>8</mn>
</msub>
</mtd>
</mtr>
</mtable>
</mfenced>
<mo>-</mo>
<mo>-</mo>
<mo>-</mo>
<mrow>
<mo>(</mo>
<mn>2</mn>
<mo>)</mo>
</mrow>
</mrow>
By I5Z5=I6Z6=I7Z7=I8Z8：
<mfenced open = "{" close = "">
<mtable>
<mtr>
<mtd>
<mrow>
<msub>
<mi>Z</mi>
<mn>6</mn>
</msub>
<mo>=</mo>
<mfrac>
<msub>
<mi>I</mi>
<mn>5</mn>
</msub>
<msub>
<mi>I</mi>
<mn>6</mn>
</msub>
</mfrac>
<msub>
<mi>Z</mi>
<mn>5</mn>
</msub>
</mrow>
</mtd>
</mtr>
<mtr>
<mtd>
<mrow>
<msub>
<mi>Z</mi>
<mn>7</mn>
</msub>
<mo>=</mo>
<mfrac>
<msub>
<mi>I</mi>
<mn>5</mn>
</msub>
<msub>
<mi>I</mi>
<mn>7</mn>
</msub>
</mfrac>
<msub>
<mi>Z</mi>
<mn>5</mn>
</msub>
</mrow>
</mtd>
</mtr>
<mtr>
<mtd>
<mrow>
<msub>
<mi>Z</mi>
<mn>8</mn>
</msub>
<mo>=</mo>
<mfrac>
<msub>
<mi>I</mi>
<mn>5</mn>
</msub>
<msub>
<mi>I</mi>
<mn>8</mn>
</msub>
</mfrac>
<msub>
<mi>Z</mi>
<mn>5</mn>
</msub>
</mrow>
</mtd>
</mtr>
</mtable>
</mfenced>
And Zeg=Z5//Z6//Z7//Z8
Simultaneous Equations (1) and (2) are understood：
Unknown number has Z1、Z2、Z3、Z4、ZL、ZR、Reg、Z5Totally 8, and meetingCondition
Under, solution of equations presence is simultaneously unique；
Solve equation group and obtain circuit parameter Reg。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711125195.2A CN107656144A (en) | 2017-11-14 | 2017-11-14 | A kind of comprehensive detection system and method for transmission line of electricity earthed system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711125195.2A CN107656144A (en) | 2017-11-14 | 2017-11-14 | A kind of comprehensive detection system and method for transmission line of electricity earthed system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107656144A true CN107656144A (en) | 2018-02-02 |
Family
ID=61121506
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711125195.2A Pending CN107656144A (en) | 2017-11-14 | 2017-11-14 | A kind of comprehensive detection system and method for transmission line of electricity earthed system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107656144A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109900966A (en) * | 2019-02-15 | 2019-06-18 | 武汉市康达电气有限公司 | Transmission tower grounding impedance measuring system |
| CN110261680A (en) * | 2019-07-08 | 2019-09-20 | 金茂联合(北京)科技发展有限公司 | Detection method, device, system and the monitoring network of earthed system resistance parameter |
| CN110514904A (en) * | 2019-09-29 | 2019-11-29 | 国网河南省电力公司濮阳供电公司 | Insulating resistance measuring early warning system |
| CN110514903A (en) * | 2019-09-29 | 2019-11-29 | 国网河南省电力公司濮阳供电公司 | Ground resistance state evaluation and on-line early warning cloud monitoring system |
| CN112285426A (en) * | 2020-10-29 | 2021-01-29 | 广东电网有限责任公司电力科学研究院 | Grounding resistance testing method and system of tower grounding device and terminal equipment |
| CN112285425A (en) * | 2020-10-29 | 2021-01-29 | 广东电网有限责任公司电力科学研究院 | Grounding resistance calculation method and device of tower grounding device and terminal equipment |
| CN112485532A (en) * | 2020-12-01 | 2021-03-12 | 山东建筑大学 | Multi-down-lead grounding resistance measuring method based on node voltage method |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61132880A (en) * | 1984-11-30 | 1986-06-20 | Kyushu Electric Power Co Inc | Method and instrument for measuring ground resistance of individual steel tower of transmission line brought to interlocked earthing |
| CN1158425A (en) * | 1996-11-26 | 1997-09-03 | 山西省忻州地区电业局 | Release-free electric cable tower ground resistance testing method and device |
| KR20060038542A (en) * | 2004-10-30 | 2006-05-04 | 한국전력공사 | The techniques and the device to measure the ground resistance using the leakage current in the ground conductor |
| CN1828313A (en) * | 2006-02-21 | 2006-09-06 | 武汉高压研究所 | Pole tower earthing resistance quick testing method without unfastening wire and device |
| KR20070046645A (en) * | 2005-10-31 | 2007-05-03 | 한국전력공사 | Measurement method of grounding resistance of transmission towers in an energized transmission line system |
| CN101290336A (en) * | 2008-06-18 | 2008-10-22 | 昆明理工大学 | Alternating-current powerline thunderbolt shielding failure and counterattack recognition method |
| CN101980032A (en) * | 2010-08-17 | 2011-02-23 | 南京信息工程大学 | Method and device for measuring grounding resistance of lightning protection belt on top in wireless mode |
| WO2012015107A1 (en) * | 2010-07-28 | 2012-02-02 | 한국전력공사 | Method for apparatus for measuring composite ground resistance of neutral wire of distribution line in operation |
| CN102680798A (en) * | 2012-02-28 | 2012-09-19 | 山东建筑大学 | Online measurement method and device for grounding resistor of rod tower |
| CN104635087A (en) * | 2015-02-09 | 2015-05-20 | 云南电网有限责任公司电力科学研究院 | Inspection method for grounding safety performance of power transmission wire pole tower during lightning wire insulation erection |
| CN204903655U (en) * | 2015-08-17 | 2015-12-23 | 国网辽宁省电力有限公司抚顺供电公司 | Tower grounding resistance measurement device of disconnect ground downlead exempts from |
| CN105891606A (en) * | 2016-06-27 | 2016-08-24 | 国网甘肃省电力公司白银供电公司 | Device for testing tower grounding resistance through disassembly-free ground lead |
| CN105891604A (en) * | 2016-04-11 | 2016-08-24 | 国网安徽省电力公司电力科学研究院 | Loop impedance method of measuring power transmission support grounding impedance and testing system |
| CN206450761U (en) * | 2016-06-27 | 2017-08-29 | 国网甘肃省电力公司白银供电公司 | Exempt from the device that dismounting ground wire tests steel tower grounding resistance |
-
2017
- 2017-11-14 CN CN201711125195.2A patent/CN107656144A/en active Pending
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61132880A (en) * | 1984-11-30 | 1986-06-20 | Kyushu Electric Power Co Inc | Method and instrument for measuring ground resistance of individual steel tower of transmission line brought to interlocked earthing |
| CN1158425A (en) * | 1996-11-26 | 1997-09-03 | 山西省忻州地区电业局 | Release-free electric cable tower ground resistance testing method and device |
| KR20060038542A (en) * | 2004-10-30 | 2006-05-04 | 한국전력공사 | The techniques and the device to measure the ground resistance using the leakage current in the ground conductor |
| KR20070046645A (en) * | 2005-10-31 | 2007-05-03 | 한국전력공사 | Measurement method of grounding resistance of transmission towers in an energized transmission line system |
| CN1828313A (en) * | 2006-02-21 | 2006-09-06 | 武汉高压研究所 | Pole tower earthing resistance quick testing method without unfastening wire and device |
| CN101290336A (en) * | 2008-06-18 | 2008-10-22 | 昆明理工大学 | Alternating-current powerline thunderbolt shielding failure and counterattack recognition method |
| WO2012015107A1 (en) * | 2010-07-28 | 2012-02-02 | 한국전력공사 | Method for apparatus for measuring composite ground resistance of neutral wire of distribution line in operation |
| CN101980032A (en) * | 2010-08-17 | 2011-02-23 | 南京信息工程大学 | Method and device for measuring grounding resistance of lightning protection belt on top in wireless mode |
| CN102680798A (en) * | 2012-02-28 | 2012-09-19 | 山东建筑大学 | Online measurement method and device for grounding resistor of rod tower |
| CN104635087A (en) * | 2015-02-09 | 2015-05-20 | 云南电网有限责任公司电力科学研究院 | Inspection method for grounding safety performance of power transmission wire pole tower during lightning wire insulation erection |
| CN204903655U (en) * | 2015-08-17 | 2015-12-23 | 国网辽宁省电力有限公司抚顺供电公司 | Tower grounding resistance measurement device of disconnect ground downlead exempts from |
| CN105891604A (en) * | 2016-04-11 | 2016-08-24 | 国网安徽省电力公司电力科学研究院 | Loop impedance method of measuring power transmission support grounding impedance and testing system |
| CN105891606A (en) * | 2016-06-27 | 2016-08-24 | 国网甘肃省电力公司白银供电公司 | Device for testing tower grounding resistance through disassembly-free ground lead |
| CN206450761U (en) * | 2016-06-27 | 2017-08-29 | 国网甘肃省电力公司白银供电公司 | Exempt from the device that dismounting ground wire tests steel tower grounding resistance |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109900966A (en) * | 2019-02-15 | 2019-06-18 | 武汉市康达电气有限公司 | Transmission tower grounding impedance measuring system |
| CN110261680A (en) * | 2019-07-08 | 2019-09-20 | 金茂联合(北京)科技发展有限公司 | Detection method, device, system and the monitoring network of earthed system resistance parameter |
| CN110261680B (en) * | 2019-07-08 | 2024-04-12 | 金茂联合(北京)科技发展有限公司 | Method, device and system for detecting resistance parameters of grounding system and monitoring network |
| CN110514904A (en) * | 2019-09-29 | 2019-11-29 | 国网河南省电力公司濮阳供电公司 | Insulating resistance measuring early warning system |
| CN110514903A (en) * | 2019-09-29 | 2019-11-29 | 国网河南省电力公司濮阳供电公司 | Ground resistance state evaluation and on-line early warning cloud monitoring system |
| CN112285426A (en) * | 2020-10-29 | 2021-01-29 | 广东电网有限责任公司电力科学研究院 | Grounding resistance testing method and system of tower grounding device and terminal equipment |
| CN112285425A (en) * | 2020-10-29 | 2021-01-29 | 广东电网有限责任公司电力科学研究院 | Grounding resistance calculation method and device of tower grounding device and terminal equipment |
| CN112485532A (en) * | 2020-12-01 | 2021-03-12 | 山东建筑大学 | Multi-down-lead grounding resistance measuring method based on node voltage method |
| CN112485532B (en) * | 2020-12-01 | 2022-02-25 | 山东建筑大学 | Multi-down-lead grounding resistance measuring method based on node voltage method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107656144A (en) | A kind of comprehensive detection system and method for transmission line of electricity earthed system | |
| CN102680798B (en) | Online measurement method and device for grounding resistor of rod tower | |
| JP5695889B2 (en) | How to measure the earth ground resistance of a steel tower using a single clamp | |
| CN206671472U (en) | High-tension cable local discharge detection device | |
| CN104459529B (en) | The double loop method of testing of transformer station's mechanical characteristic of high-voltage circuit breaker experiment | |
| CN103941161A (en) | On-line monitoring system for current and carrying capacity of cable sheath | |
| CN206975158U (en) | A kind of detection means of generator rotor interturn short-circuit situation | |
| CN107064648B (en) | The detection device and method of the lightning-arrest lead resistance value of blower fan pylon based on leakage cable | |
| CN108152596B (en) | A kind of electric force pole tower ground resistance measuring instrument and resistance measurement method | |
| KR20120018093A (en) | Measuring system for a down conductor of a wind turbine blade | |
| CN107132455B (en) | A kind of grounding net of transformer substation performance estimating method based on ground line current injection | |
| CN105842540A (en) | Method for detecting DC bus insulation resistance | |
| BR112019027931A2 (en) | lightning detection and measurement system and method for detecting the location of lightning strikes in a wind turbine blade | |
| CN103901326B (en) | Automatic withstand voltage detecting and automatic sorting device of safety equipment | |
| CN105467192B (en) | A kind of method for measuring current conversion station ground potential and rising | |
| CN103487725B (en) | A kind of overhead distribution earth fault indicating device based on zero-sequence component method | |
| CN105891604A (en) | Loop impedance method of measuring power transmission support grounding impedance and testing system | |
| CN202141752U (en) | Online monitoring device for metal zinc oxide lightning arrester | |
| CN205539205U (en) | Measure transmission tower earth impedance's return circuit impedance test system | |
| CN201237618Y (en) | Phase voltage detection circuit for three-phase three-wire system electric network | |
| CN102346230B (en) | Method and device for online detection of transformer sleeve | |
| CN203587736U (en) | Overhead distributing line ground fault indicating device based on zero-sequence component method | |
| CN208736935U (en) | A kind of tower bar grounding resistance monitoring device | |
| CN208383984U (en) | A kind of intelligent electric meter | |
| CN109557380A (en) | A kind of oil gas library ground resistance on-Line Monitor Device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180202 |