CN108051647A - A kind of method of wind power plant soil resistivity correction measurement - Google Patents
A kind of method of wind power plant soil resistivity correction measurement Download PDFInfo
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- CN108051647A CN108051647A CN201711248062.4A CN201711248062A CN108051647A CN 108051647 A CN108051647 A CN 108051647A CN 201711248062 A CN201711248062 A CN 201711248062A CN 108051647 A CN108051647 A CN 108051647A
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- power plant
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- soil resistivity
- plant soil
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- 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
- G01R27/08—Measuring resistance by measuring both voltage and current
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Abstract
The method measured is corrected the present invention provides a kind of wind power plant soil resistivity, the described method includes：A selected measuring center point；It sets apart from the symmetrical two groups of measuring electrodes of the measuring center point, the wind power plant soil resistivity is measured using at least two groups of measuring electrodes；Two groups of measuring electrodes exchange electrode is corrected measurement and obtains correction wind power plant soil resistivity；When the error of the wind power plant soil resistivity and correction wind power plant soil resistivity is less than preset value, then the wind power plant soil resistivity average value repeatedly measured is determined as wind power plant soil resistivity.The present invention is logical to have the advantages that measurement is accurate low with measurement difficulty.
Description
Technical field
The present invention relates to wind power plant resistance measurement rate field, more particularly to a kind of wind power plant soil resistivity correction measurement
Method.
Background technology
Wind resource has obtained sending out energetically at home recent years due to its spatter property, recyclability, abundant reserves
Exhibition.Wind power plant floor space is small, is a kind of extremely promising clear energy sources, most of wind farm substation construction is in hills
Area, soil texture is complicated, and ground resistance is high.The characteristics of soil texture is complicated, resistivity is high increases wind power plant electric resistance of soil
The difficulty of the measurement work of rate.So a kind of soil resistivity measurement suitable for wind power plant of research is with the method corrected
It is very necessary.
The content of the invention
The present invention provides a kind of methods of wind power plant soil resistivity correction measurement, overcome current measurement wind power plant soil
The characteristics of resistivity difficulty is high.
The method measured is corrected the present invention provides a kind of wind power plant soil resistivity, the described method includes：
A selected measuring center point；
It sets apart from the symmetrical two groups of measuring electrodes of the measuring center point, utilizes at least two groups of measuring electrode measurement institutes
State wind power plant soil resistivity；
Two groups of measuring electrodes exchange electrode is corrected measurement and obtains correction wind power plant soil resistivity；
Then will be more when the error of the wind power plant soil resistivity and correction wind power plant soil resistivity is less than preset value
The wind power plant soil resistivity average value of secondary measurement is determined as wind power plant soil resistivity.
Preferably, two groups of measuring electrode measuring electrodes include a pair of of voltage measurement electrodes and a pair of of current measurement electricity
Pole.
Preferably, in described the step of measuring the wind power plant soil resistivity using two groups of measuring electrodes, also wrap
It includes：
The wind power plant soil resistivity is repeatedly measured using two groups of measuring electrodes measurement；
It is described repeatedly measure the measurement of pole span value when, pole span value next time is last pole span value really 1 to 1.5
Times.
Preferably, described when the wind power plant soil resistivity is more than in advance with correcting the error of wind power plant soil resistivity
It if during value, resurveys, if continuous preset value big three times, re-establishes measurement point, until when the wind power plant soil resistivity
When error with correcting wind power plant soil resistivity is less than preset value, then the wind power plant soil resistivity repeatedly measured is put down
Average is determined as wind power plant soil resistivity.
Compared to the prior art, the method for the wind power plant soil resistivity correction measurement of the embodiment of the present invention sets distance
The symmetrical two groups of measuring electrodes of the measuring center point measure the wind power plant electric resistance of soil using at least two groups of measuring electrodes
Rate；Two groups of measuring electrodes exchange electrode is corrected measurement and obtains correction wind power plant soil resistivity；When the wind-powered electricity generation
When the error of soil resistivity and correction wind power plant soil resistivity is less than preset value, then the wind power plant that will repeatedly measure
Soil resistivity average value is determined as wind power plant soil resistivity, has the advantages that measurement difficulty is low and measurement accuracy is high.
Description of the drawings
Fig. 1 is the method flow diagram for the wind power plant soil resistivity correction measurement that the present invention is preferably implemented.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is described in further detail.
Referring to Fig. 1, a kind of method of wind power plant soil resistivity correction measurement of the present invention, the described method includes：
S1：A selected measuring center point；
S3：It sets apart from the symmetrical two groups of measuring electrodes of the measuring center point, is surveyed using at least two groups of measuring electrodes
Measure the wind power plant soil resistivity；
S5：Two groups of measuring electrodes exchange electrode is corrected measurement and obtains correction wind power plant soil resistivity；
S7：When the error of the wind power plant soil resistivity and correction wind power plant soil resistivity is less than preset value, then
The wind power plant soil resistivity average value repeatedly measured is determined as wind power plant soil resistivity.
Further, two groups of measuring electrode measuring electrodes include a pair of of voltage measurement electrodes and a pair of of current measurement electricity
Pole.
Further, in S3 the wind power plant soil resistivity is repeatedly measured using two groups of measuring electrodes measurement；
When the pole span value repeatedly measured measures, pole span value next time is 1 to 1.5 times really last of pole span value.
Further, described when the wind power plant soil resistivity is more than with correcting the error of wind power plant soil resistivity
It during preset value, resurveys, if continuous preset value big three times, re-establishes measurement point, until when the wind power plant electric resistance of soil
When rate and the error of correction wind power plant soil resistivity are less than preset value, then the wind power plant soil resistivity that will repeatedly measure
Average value is determined as wind power plant soil resistivity.
Specifically, the wind power plant soil resistivity measurement bearing calibration is surveyed by four-electrode method measuring method and four-electrode method correction
Amount method forms, and wherein four-electrode method measuring device includes four-electrode method measuring apparatus, four-electrode method pole span arrangement principle；Four-electrode method corrects
Measuring method includes four-electrode method correction measuring apparatus, calibration principle, and four-electrode method measuring method is measurement wind power plant soil resistivity
Basis, pole span arrangement play the role of it is vital, four-electrode method correction measuring method using exchange measurement pole by the way of correct
Soil resistivity is measured, and measurement result and correcting measured results are compared, determines soil resistivity most according to calibration principle
Final value ensures the accuracy of measurement.Specific design is as follows：
1) four-electrode method, i.e., above-mentioned two pairs of electrodes measurement methods, this measuring apparatus can quickly and easily measure wind-powered electricity generation
The soil resistivity initial value of field；
2) four-electrode method pole span arrangement principle includes Wenner method for arranging and " 1-2-3-5-7 principles " two parts, wherein
Wenner method for arranging is also referred to as equidistant four-electrode method, and four measurement earthing poles are located on a horizontal line of same depth, two-by-two
Distance is equal between measuring pole, and this method is squeezed into electrode in ground and do not required, easy to operate；Wherein " 1-2-3-5-7 is former
Then " refer to measure pole span under ascending order arranging situation, consecutive roots away from next measurement pole span from for upper 1 to 1.5 times of a pole span, i.e.,
1 should be met：1.5 or so requirement, it is possible to there is higher robustness and obtain measurement point dense enough, it is possible to
Order measurement pole span an order of magnitude in the range of is taken in 1/2/3/5/7 ratio, if pole span is in the range of 1m~10m, pole span be taken as 1m,
2m、3m、5m、7m、10m；For pole span in the range of 10m~100m, pole span is taken as 10m, 20m, 30m, 50m, 70m, 100m, maximum pole
1~3 times of catercorner length of earth mat should be taken away from amax.
3) four-electrode method correction measuring apparatus is that repacking design is carried out on the basis of four-electrode method measuring apparatus, and equipment principle is
By the place-exchange of the current measurement pole of four-electrode method measuring device and voltage measurement pole, at this time measurement result with exchange before theoretically
It is equal, if unequal, then there may be measurement error or measurement result inaccuracy, so four-electrode method corrects measuring apparatus
Voltage pole and electric current pole place-exchange, rest part design structure is the same as four-electrode method measuring apparatus.
If 4) calibration principle be measurement result and correction result deviation within preset value, such as 5%, then wind power plant soil
Resistance is averaged；If measurement result and correction result error are more than 5%, resurvey；If measurement result and correction result three times
Deviation be both greater than 5%, then cast out the measurement point, establish new measurement point.
Method is as follows：
1) four-electrode method measurement ground resistivity model is carried out for the first time, and there are two types of four-electrode method measuring devices, and one kind is electric current electricity
Table method is pressed, another kind is megohmmeter measuring method, and this patent is measured using current voltmeter subtraction unit, and measuring process is as follows：It is first
Site inspection is first carried out, determines measuring center point, keeps measuring center point position constant afterwards, (or appoints with North and South direction and takes certain
One direction) progress pole span is connected up as diThe measurement of Wenner equidistant four-electrode methods；Then keep measuring center point position constant, according to
The pole span arrangement principle of " 1-2-3-5-7 principles ", change measurement pole span difference value " 0.5m, 0.7m, 1m, 2m, 3m, 5m,
7m ..., amax", it is carried out similarly with east-west direction (or perpendicular to upper measurement direction) wire laying mode to rearrange earthing pole
Measurement, and observe the otherness of apparent resistivity in both direction；Finally, the m group pole span cloth for completing measurement postpones, with root mean square
Error formula F1Carry out the one-dimensional inversion and 3-d inversion of soil model：
Wherein, ρaAnd ρMThe respectively forward modeling value and measured value of four-electrode method apparent resistivity.
It is worth noting that, in measurement process, it is still to be judged whether to supplement local measurement according to inversion result, that is, moves
Measuring center point carries out additional survey and inverting further according to above-mentioned steps.
2) above method is that repacking design is carried out on the basis of four-electrode method measuring apparatus, and four-electrode method measuring apparatus principle is
By the place-exchange of the current measurement pole of script four-electrode method and voltage measurement pole, because this patent is using Wenner arrangements etc.
Away from four-electrode method, so before and after exchange, the drawn apparent resistivity ρ of measurement should be：
Wherein, V2-3It is the electrical potential difference of 2,3 electrodes, h is electrode buried depth.
After electric current pole, voltage pole position is changed, by that should be kept before the apparent resistivity of above-mentioned formula calculating and change
It is equal.
Four-electrode method means for correcting measures measuring process of the measuring process with four-electrode method measuring device of soil corrected resistivity,
Measuring center point uses the central point of mensuration, and pole span selection principle remains as " 1-2-3-5-7 principles ", measures the cloth of earthing pole
Putting direction and pole span selection wants summation metering identical, after apparent resistivity is measured, by result and the result of mensuration
It compares.
3) after the measurement result and the measurement result of correction method for obtaining mensuration, two kinds of results is compared, are pressed
Final resistivity Model is determined according to following calibration principle：
If the deviation of measurement result and correction result is within default 5%, it is believed that measurement initial value is effective, then wind power plant soil
Resistance takes measurement result and corrects the average value of result；
If the deviation ＞ 5% of measurement result and correction result, it is believed that measurement initial value error is excessive, then uses four-electrode method again
Measurement and four-electrode method correction measuring device measure the soil resistivity under the pole span and arrangement, again comparative result, directly
To result error ＜ 5%.
If resurveying three times, the deviation of measurement result and correction result is both greater than preset value, chooses 5% here, it is believed that the survey
Amount central point can not be accurately obtained ground resistivity, then cast out the point, re-start site inspection, determine new measurement again
Central point.
Compared with prior art, the present invention has following advantageous effect：The present invention is suitable for the wind in soil high resistant area
The measurement of power generating field soil resistivity；The present invention proposes a kind of new four-electrode method pole span arrangement principle：" 1-2-3-5-7 is former
Then ", there is higher robustness according to the pole span of this principle arrangement, while can also obtains measurement point dense enough, be
The accurate wind power plant soil resistivity that obtains is laid a solid foundation；The present invention, which devises one kind, can correct four-electrode method electric resistance of soil
The device of rate measurement result accuracy, the principle of device are easily understood, and device is workable, and measurement is convenient, directly can be by
Four-electrode method measuring device reequips to obtain, and reduces cost, avoids economic waste, while the soil in high resistant area is also measured for four-electrode method
The accuracy of resistivity provides certain guarantee；The present invention proposes a kind of calibration principle of soil resistivity, is four-electrode method soil
The correction of earth resistivity provides criterion, and calibration principle is verified by substantial amounts of engineering practice project, is that science is feasible, can
Ensure the accuracy of four-electrode method measurement wind power plant ground resistivity.
One of ordinary skill in the art will appreciate that hardware can be passed through by realizing all or part of step of above-described embodiment
It completes, relevant hardware can also be instructed to complete by program, the program can be stored in a kind of computer-readable
In storage medium, storage medium mentioned above can be read-only memory, disk or CD etc..
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all the present invention spirit and
Within principle, any modifications, equivalent replacements and improvements are made should all be included in the protection scope of the present invention.
Claims (4)
- A kind of 1. method of wind power plant soil resistivity correction measurement, which is characterized in that the described method includes：A selected measuring center point；It sets apart from the symmetrical two groups of measuring electrodes of the measuring center point, the wind is measured using at least two groups of measuring electrodes Electric field soil resistivity；Two groups of measuring electrodes exchange electrode is corrected measurement and obtains correction wind power plant soil resistivity；When the error of the wind power plant soil resistivity and correction wind power plant soil resistivity is less than preset value, then will repeatedly survey The wind power plant soil resistivity average value of amount is determined as wind power plant soil resistivity.
- 2. the method for wind power plant soil resistivity correction measurement according to claim 1, which is characterized in that two groups of measurements Electrode measurement electrode includes a pair of of voltage measurement electrodes and a pair of of amperometric electrode.
- 3. the method for wind power plant soil resistivity correction measurement according to claim 1, which is characterized in that described in the utilization In the step of two groups of measuring electrodes measure the wind power plant soil resistivity, further include：The wind power plant soil resistivity is repeatedly measured using two groups of measuring electrodes measurement；When the pole span value repeatedly measured measures, pole span value next time is 1 to 1.5 times really last of pole span value.
- 4. the method for wind power plant soil resistivity correction measurement according to claim 1, which is characterized in that described when described It when wind power plant soil resistivity and the error of correction wind power plant soil resistivity are more than preset value, resurveys, if continuous big three times Preset value then re-establishes measurement point, until when the wind power plant soil resistivity and the mistake for correcting wind power plant soil resistivity When difference is less than preset value, then the wind power plant soil resistivity average value repeatedly measured is determined as wind power plant electric resistance of soil Rate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711248062.4A CN108051647B (en) | 2017-12-01 | 2017-12-01 | Method for correcting and measuring soil resistivity of wind power plant |
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| CN201711248062.4A CN108051647B (en) | 2017-12-01 | 2017-12-01 | Method for correcting and measuring soil resistivity of wind power plant |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109361080A (en) * | 2018-10-08 | 2019-02-19 | 湖北捷地安电气有限公司 | Resistance method efficiently drops in a kind of substation |
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| CN109361080A (en) * | 2018-10-08 | 2019-02-19 | 湖北捷地安电气有限公司 | Resistance method efficiently drops in a kind of substation |
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