Method for measuring low resistance tilt of extra-high voltage transformer substation by using total station

Abstract

The application discloses a kind of methods for measuring the tilt of extra-high voltage substation low resistance using total station, comprising the following steps: step S1: place total station at a suitable place, with total station as origin, establish independent coordinate system;Step S2: measure the left and right cut points and horizontal direction readings of total station and the base and top of extra-high voltage substation, obtain the coordinates of the center points of the outer surface of the base and the top;Step S3: with total station as origin, measure the coordinates of multiple points on the slope in the nearest direction of extra-high voltage substation;Step S4: based on the coordinates in step S3, calculate the tilt and inclination of extra-high voltage substation;Total station can directly measure the base coordinates and top coordinates of the device to be detected, and can be applied to all detection environments, with low requirements for the detection environment, simple operation method, easy to operate, numerical comparison is carried out on each coordinate point by using permutation and combination method, and the average value of the remaining data is calculated after eliminating the interference data, to improve the calculation accuracy.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of substation device measurement, in particular to a method for measuring the inclination of low resistance of an extra-high voltage substation using a total station. BACKGROUND

[0002] In recent years, with the rapid development of science and technology and the continuous acceleration of China's modernization process, high-rise round buildings such as water towers, chimneys, silos, storage tanks, television towers, and cooling towers have sprung up like mushrooms after a spring rain. As the height and size of the building (structure) continue to increase, its stability and reliability have become the focus of attention, and the inclination of the building (structure) is one of the important indicators for measuring the quality of construction technology. However, the traditional observation methods such as the theodolite small angle method and the theodolite point projection method have low observation accuracy due to the limitations of instrument precision and observation conditions, and it is difficult to meet the requirements.

[0003] For example, a kind of inclination measuring instrument and inclination measuring method disclosed in Chinese patent literature detects the inclination change of the surface to be measured of the object to be measured by sensing transducer unit, and converts the inclination change into voltage change signal, real-time monitors the inclination of the surface to be measured of the object to be measured. This method has great requirements for the environment around the detection instrument, and it is difficult to measure the round high-rise structure conveniently. SUMMARY

[0004] The present application is to overcome the problem that the inclination rate detection instrument has great requirements for the environment around the instrument, and it is difficult to measure the round high-rise building and device structure conveniently in the prior art. A method for measuring the inclination of low resistance of an extra-high voltage substation using a total station is provided. The electronic total station without prism can determine the spatial position with fixed point without reflecting target. The measurement method is simple, the total station has no great demand for the placement environment, the method is simple and easy to operate, and is suitable for various terrains.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0006] A method for measuring the inclination of low resistance of an extra-high voltage substation using a total station, specifically comprising the following steps:

[0007] Step S1: Place the total station at a suitable location, and establish an independent coordinate system with the total station as the origin;

[0008] Step S2: Measure the left and right cut points and the horizontal direction readings of the total station and the base and top of the extra-high voltage substation, and obtain the coordinates of the center points of the outer surfaces of the base and the top;

[0009] Step S3: Measure the coordinates of multiple points on the inclined surface in the nearest direction of the extra-high voltage substation with the total station as the origin;

[0010] Step S4: based on the coordinates in step S3, calculate the tilt amount and tilt degree of the UHV substation.

[0011] As preferred, the step S2 of obtaining the coordinates of the center point of the outer surface of the base includes the following steps:

[0012] Step S2-1-1: aim at the left and right cut points of the low resistance base as Q1 and Q2, respectively measure and read the horizontal direction readings as H1 and H2;

[0013] Step S2-1-2: calculate the average value H of the horizontal direction readings H1 and H2;

[0014] Step S2-1-3: aim at the center point C0 of the outer surface of the base of the UHV substation according to the average value H, start the coordinate measurement function of the total station, and obtain the coordinates (X0, Y0, Z0) of the center point C0 of the outer surface of the base.

[0015] Take the total station as the origin, and the cut points of the base of the device to be measured as three reference points, obtain the average height difference between the base of the UHV substation and the ground, and obtain the coordinates of the center point C0 of the outer surface of the base, which is the data basis for subsequent determination of the combination of all required outer surface coordinate points on a straight line.

[0016] As preferred, the step S2 of obtaining the coordinates of the center point of the outer surface of the base includes the following steps:

[0017] Step S2-2-1: aim at the left and right cut points of the low resistance base as Q1 and Q2, respectively measure and read the horizontal direction readings as H1 and H2;

[0018] Step S2-2-2: calculate the average value H of the horizontal direction readings H1 and H2;

[0019] Step S2-2-3: aim at the first top outer surface center point C1a of the UHV substation according to the average value H, start the coordinate measurement function of the total station, and obtain the coordinates (X1a, Y1a, Z1a) of the first top outer surface center point C1a;

[0020] Step S2-2-4: take C0 as the base point, and the total station scans upward along the side of the UHV substation to obtain the intersection point of the current side and the top outer surface as the second top outer surface center point C1b, start the coordinate measurement function of the total station, and obtain the coordinates (X1b, Y1b, Z1b) of the second top outer surface center point C1b;

[0021] Step S2-2-5: calculate the average value of the first top outer surface center point C1a and the second top outer surface center point C1b to obtain the top outer surface center point C1 (X1, Y1, Z1), wherein X1=X1a+X1b, Y1=Y1a+Y1b, and Z1=Z1a+Z1b.

[0022] The coordinates of the first top outer surface center point C1a are obtained based on the low anti-top left and right cut points respectively, and the second top outer surface center point C1b is obtained by scanning along the side of the ultra-high voltage substation upwards based on C0 as the base point, the intersection point of the current side and the top outer surface, the average of C1a and C1b is calculated to obtain the top outer surface center point C1, so that the value of C1 is more accurate, and the subsequent calculation error is reduced.

[0023] As a preferred, the step S3 comprises the following steps:

[0024] Step S3-1: connecting C0 and C1 into a straight line L in the total station camera system;

[0025] Step S3-2: taking the total station as the origin A and the bottom outer surface center point C0 as the base point, collecting the ultra-high voltage substation outer surface coordinate points C2, C3, C4, C5…C11 in the direction of the straight line L, a total of 10 points.

[0026] As a preferred, the data in the direction of the straight line L in the step S3-2 is collected and stored at intervals of one-tenth of the total length of the line segment L.

[0027] As a preferred, the step S3-2 further comprises the following steps:

[0028] Step S3-2-1: recording the coordinates C2(X2, Y2, Z2), C3(X3, Y3, Z3),…C11(X11, Y11, Z11) of all surface coordinate points in the direction of the straight line L;

[0029] Step S3-2-2: combining and pairing the above 10 coordinate points two by two, taking the paired combination as the calculation basis for subsequent calculation.

[0030] As a preferred, the step S4 comprises the following steps:

[0031] Step S4-1: according to the paired coordinate points completed in step S3-2-2, calculating the tilt amount and the tilt rate of each group of coordinates, wherein the tilt amount formula is ΔX%=ΔX / ΔZ; the tilt rate formula is ΔY%=ΔY / ΔZ;

[0032] Step S4-2: after the calculation is completed, integrating and sorting all the obtained tilt amount and tilt rate, eliminating the tilt amount and tilt rate samples with large data gap, and calculating the average value of the remaining data to obtain the final tilt amount and tilt rate value.

[0033] The arrangement combination method is used to each coordinate point, 45 groups of inclination and inclination rate values are obtained, numerical comparison is carried out, when the value with the inclination and inclination rate values of other inclination and inclination rate values is larger, the current value is judged as the value of the shell of the external fixed device of the substation, that is, the interference data is classified, and the interference data is removed, the average value of the remaining data is calculated after the interference data is removed, so that the most accurate actual inclination and inclination rate are obtained, and the calculation accuracy is improved.

[0034] As preferred, in the process of calculating the inclination and the inclination degree in the step S4-1, the total station instrument performs equal calibration of the Z-direction height by taking the central axial height of the center of the top of the substation from the ground as the reference.

[0035] Therefore, the present application has the following beneficial effects:

[0036] The first top outer surface center point C1a is obtained based on the low-resistance top left and right cut points respectively, and the second top outer surface center point C1b is obtained by scanning along the side of the UHV substation upwards based on C0, the average value of C1a and C1b is calculated to obtain the top outer surface center point C1, so that the value of C1 is more accurate, and the subsequent calculation error is reduced;

[0037] The total station instrument can directly measure the base coordinates and the top coordinates of the device to be detected, can be applied to all detection environments, has low requirements on the detection environment, and has a simple operation method and is easy to operate;

[0038] The arrangement combination method is used to each coordinate point, 45 groups of inclination and inclination rate values are obtained, numerical comparison is carried out, when the value with the inclination and inclination rate values of other inclination and inclination rate values is larger, the current value is judged as the value of the shell of the external fixed device of the substation, that is, the interference data is classified, and the interference data is removed, the average value of the remaining data is calculated after the interference data is removed, so that the most accurate actual inclination and inclination rate are obtained, and the calculation accuracy is improved. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 It is a detection method flow chart of the present application;

[0040] Figure 2 It is a low-resistance inclination observation schematic diagram of the present application.

[0041] Wherein, A is a total station measuring point, Q1 is a bottom left cut point, Q2 is a bottom right cut point, Q3 is a top left cut point, Q4 is a top right cut point, C0 is a bottom outer surface center point, and C1 is a top outer surface center point. DETAILED DESCRIPTION

[0042] The detection method will be further specifically described in combination with the drawings and specific embodiments.

[0043] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, it can be fixed connection or detachable connection; it can be mechanical connection or electrical connection; it can be direct connection or indirect connection through intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0044] As Figure 1 The detection method flow chart of the present application is shown, a method for measuring the tilt of low resistance of an extra-high voltage substation using a total station, specifically comprising the following steps:

[0045] Step S1: placing the total station at a suitable place, establishing an independent coordinate system with the total station as the origin;

[0046] Step S2: measuring the left and right tangent points and the horizontal direction readings of the total station and the base and top of the extra-high voltage substation, obtaining the coordinates of the center points of the outer surfaces of the base and the top;

[0047] Step S3: measuring the coordinates of multiple points on the slope in the nearest direction of the extra-high voltage substation with the total station as the origin;

[0048] Step S4: calculating the tilt and tilt degree of the extra-high voltage substation based on the coordinates in step S3.

[0049] As a preferred, the obtaining of the coordinates of the center point of the outer surface of the base in step S2 comprises the following steps:

[0050] Step S2-1-1: aiming at the left and right tangent points of the low resistance base as Q1 and Q2, respectively measuring and reading the horizontal direction readings as H1 and H2;

[0051] Step S2-1-2: calculating the average value H of the horizontal direction readings H1 and H2;

[0052] Step S2-1-3: aiming at the center point C0 of the outer surface of the base of the extra-high voltage substation according to the average value H, starting the coordinate measurement function of the total station, obtaining the coordinates (X0, Y0, Z0) of the center point C0 of the outer surface of the base.

[0053] Taking the total station as the origin and the tangent points of the base of the device to be measured as three reference points, obtaining the average height difference between the base of the extra-high voltage substation and the ground, obtaining the coordinates of the center point C0 of the outer surface of the base, and providing data basis for the combination of all required outer surface coordinate points on a straight line in the subsequent measurement.

[0054] AsFigure 2 As shown, the obtaining of the top outer surface center point coordinate of step S2 includes the following steps:

[0055] Step S2-2-1: aiming at the low resistance top left and right tangent points Q3 and Q4, respectively measuring and reading the horizontal direction readings H3 and H4;

[0056] Step S2-2-2: calculating the average value H' of the horizontal direction readings H3 and H4;

[0057] Step S2-2-3: aiming at the first top outer surface center point C1a of the UHV substation according to the average value H', starting the total station coordinate measurement function to obtain the coordinate (X1a, Y1a, Z1a) of the first top outer surface center point C1a;

[0058] Step S2-2-4: taking C0 as the base point, the total station scans upward along the side of the UHV substation to obtain the intersection point of the current side and the top outer surface as the second top outer surface center point C1b, starting the total station coordinate measurement function to obtain the coordinate (X1b, Y1b, Z1b) of the second top outer surface center point C1b;

[0059] Step S2-2-5: calculating the average value of the first top outer surface center point C1a and the second top outer surface center point C1b to obtain the top outer surface center point C1 (X1, Y1, Z1), wherein X1 = X1a + X1b, Y1 = Y1a + Y1b, and Z1 = Z1a + Z1b.

[0060] Taking the low resistance top left and right tangent points as the basis to obtain the coordinate of the first top outer surface center point C1a, and taking C0 as the base point to scan upward along the side of the UHV substation to obtain the intersection point of the current side and the top outer surface as the second top outer surface center point C1b, calculating the average value of C1a and C1b to obtain the top outer surface center point C1 makes the value of C1 more accurate and reduces the subsequent calculation error.

[0061] Step S3 includes the following steps:

[0062] Step S3-1: connecting C0 and C1 into a straight line L in the total station camera system;

[0063] Step S3-2: taking the total station as the origin A and the bottom outer surface center point C0 as the base point, collecting the UHV substation outer surface coordinate points C2, C3, C4, C5…C11 in the direction of the straight line L, a total of 10 points.

[0064] The data in the direction of the straight line L in step S3-2 is collected and stored at intervals of one tenth of the total length of the line segment L.

[0065] Step S3-2 further includes the following steps:

[0066] Step S3-2-1: Record the coordinates of all surface coordinate points along the straight line L: C2(X2, Y2, Z2), C3(X3, Y3, Z3), ..., C11(X11, Y11, Z11);

[0067] Step S3-2-2: Pair the above 10 coordinate points into pairs and use the paired combinations as the basis for subsequent calculations.

[0068] Step S4 includes the following steps:

[0069] Step S4-1: Based on the coordinate points paired in step S3-2-2, calculate the tilt amount and tilt degree for each set of coordinates. The formula for calculating the tilt amount is ΔX%=ΔX / ΔZ; the formula for the tilt degree is ΔY%=ΔY / ΔZ.

[0070] Step S4-2: After completing the calculation, integrate and sort all the obtained tilt values ​​and tilt rates, remove tilt values ​​and tilt rate samples with large data differences, and calculate the average value of the remaining data to obtain the final tilt value and tilt rate value.

[0071] By using permutation and combination methods, after obtaining 45 sets of tilt and tilt rate values ​​for each coordinate point, the values ​​are compared. When a value is found to be significantly different from other tilt and tilt rate values, it is determined that the current value is a value scanned from the outer casing of the substation's external fixed device, and is thus classified as interference data and removed. After removing the interference data, the average value of the remaining data is calculated to obtain the most accurate actual tilt and tilt rate, thereby improving the calculation accuracy.

[0072] In step S4-1, during the calculation of tilt amount and tilt angle, the total station will perform equal calibration of the Z-axis height by measuring the central axial height of the top center of the substation perpendicular to the ground as a reference.

[0073] The above description of the structure, features, and effects of the present invention is based on the embodiments shown in the figures. However, the above are only preferred embodiments of the present invention. It should be noted that the technical features involved in the above embodiments and their preferred methods can be reasonably combined and matched by those skilled in the art to form a variety of equivalent solutions without departing from or changing the design concept and technical effects of the present invention. Therefore, the present invention is not limited to the scope of implementation shown in the figures. Any changes made in accordance with the concept of the present invention, or modifications to equivalent embodiments, that do not exceed the spirit covered by the specification and figures, should be within the protection scope of the present invention.

Claims

1. A method for measuring the low tilt resistance of an ultra-high voltage substation using a total station, characterized in that, Includes the following steps: Step S1: Place the total station at a suitable location and establish an independent coordinate system with the total station as the origin; Step S2: Measure the left and right tangent points and horizontal readings of the total station with respect to the base and top of the UHV substation, and obtain the coordinates of the center point of the outer surface of the base and the center point of the outer surface of the top; including: obtaining the coordinates of the first center point C1a of the outer surface of the top based on the left and right tangent points of the low-impedance top, and scanning upward along the side of the UHV substation with the center point C0 of the outer surface of the base as the base point, obtaining the intersection of the current side and the outer surface of the top as the center point C1b of the second outer surface of the top, and calculating the average value of C1a and C1b to obtain the center point of the outer surface of the top. Step S3: Using the total station as the origin, measure the coordinates of multiple points on the inclined plane closest to the UHV substation; Step S4: Based on the coordinates in Step S3, pair them up in pairs to calculate the tilt amount and tilt angle of the UHV substation. After removing samples with large data discrepancies, take the average value to obtain the final result.

2. The method for measuring the low tilt resistance of an ultra-high voltage substation using a total station according to claim 1, characterized in that, Obtaining the coordinates of the center point of the outer surface of the base in step S2 includes the following steps: Step S2-1-1: Aim at the left and right tangent points of the low-impact base as Q1 and Q2, and measure and read the horizontal readings as H1 and H2 respectively; Step S2-1-2: Calculate the average value H of the horizontal readings H1 and H2; Step S2-1-3: Based on the average value H, aim at the center point C0 of the outer surface of the UHV substation base, start the coordinate measurement function of the total station, and obtain the coordinates (X0, Y0, Z0) of the center point C0 of the bottom outer surface.

3. The method for measuring the low tilt resistance of an ultra-high voltage substation using a total station according to claim 1, characterized in that, Obtaining the coordinates of the center point of the top outer surface in step S2 includes the following steps: Step S2-2-1: Aim at the top left and right tangent points of the low impedance as Q3 and Q4, and measure and read the horizontal readings as H3 and H4 respectively; Step S2-2-2: Calculate the average value H' of the horizontal readings H3 and H4; Step S2-2-3: Based on the average value H', aim at the center point C1a of the first top outer surface of the UHV substation, start the coordinate measurement function of the total station, and obtain the coordinates (X1a, Y1a, Z1a) of the center point C1a of the first top outer surface; Step S2-2-4: Using C0 as the base point, the total station scans upwards along the side of the UHV substation to obtain the intersection of the current side and the top outer surface as the center point C1b of the second top outer surface. Then, the coordinate measurement function of the total station is activated to obtain the coordinates (X1b, Y1b, Z1b) of the center point C1b of the second top outer surface. Step S2-2-5: Calculate the average value of the center point C1a of the first top outer surface and the center point C1b of the second top outer surface to obtain the center point C1(X1, Y1, Z1) of the top outer surface, where X1 = X1a + X1b, Y1 = Y1a + Y1b, and Z1 = Z1a + Z1b.

4. The method for measuring the low tilt resistance of an ultra-high voltage substation using a total station according to claim 1, characterized in that, Step S3 includes the following steps: Step S3-1: Connect points C0 and C1 with a straight line L in the total station camera system; Step S3-2: Using the total station as the origin A and the center point C0 of the bottom outer surface as the base point, collect the coordinate points C2, C3, C4, C5...C11 on the outer surface of the UHV substation along the straight line L, for a total of 10 points.

5. The method for measuring the low tilt resistance of an ultra-high voltage substation using a total station according to claim 4, characterized in that, In step S3-2, the data along the straight line L is collected and stored at intervals of one-tenth of the total length of the line segment L.

6. The method for measuring the low tilt resistance of an ultra-high voltage substation using a total station according to claim 4, characterized in that, Step S3-2 further includes the following steps: Step S3-2-1: Record the coordinates of all surface coordinate points along the straight line L: C2(X2, Y2, Z2), C3(X3, Y3, Z3), ..., C11(X11, Y11, Z11); Step S3-2-2: Pair the above 10 coordinate points together and use the paired combinations as the basis for subsequent calculations.

7. The method for measuring the low tilt resistance of an ultra-high voltage substation using a total station according to claim 1, characterized in that, Step S4 includes the following steps: Step S4-1: Based on the coordinate points paired in step S3-2-2, calculate the tilt amount and tilt degree for each set of coordinates. The formula for calculating the tilt amount is ΔX%=ΔX / ΔZ; the formula for the tilt degree is ΔY%=ΔY / ΔZ. Step S4-2: After completing the calculation, integrate and sort all the obtained tilt values ​​and tilt rates, remove tilt values ​​and tilt rate samples with large data differences, and calculate the average value of the remaining data to obtain the final tilt value and tilt rate value.

8. A method for measuring the low tilt resistance of an ultra-high voltage substation using a total station according to claim 7, characterized in that, In step S4-1, during the calculation of tilt amount and tilt angle, the total station will perform equal calibration of the Z-axis height by measuring the central axial height of the top center of the substation perpendicular to the ground as a reference.

Images