JP5279808B2 - Grounding construction design support system - Google Patents

Description

  The present invention relates to a design support system for grounding work in which a grounding electrode is newly installed in order to suppress a grounding resistance value of electrical equipment that needs to be grounded to a predetermined specified value or less.

  Conventionally, utility poles are installed so that various electrical facilities such as transformers and lightning arresters can be provided on the poles. Therefore, the utility pole is provided with a grounding electrode buried in the surrounding ground and having conductivity, and a grounding wire for electrically connecting the grounding electrode to electrical equipment. These facilities are provided in order to prevent an electric shock, a leakage accident, and the like due to the electrical equipment, and are grounded (grounded) by connecting the electrical equipment to the ground electrode. When electrical equipment is grounded, the prescribed value of the grounding resistance that must be secured according to the type of the electrical equipment is stipulated by law, and it is selected so that it can be kept below the prescribed value and connected to the grounding pole. Is done.

  For the grounding construction method (grounding method), for example, a connection type that is driven relatively easily with a hammer or the like, a deep driving type that is deeply driven using a dedicated tool on a relatively hard ground, or a ground that has a bedrock or the like in the lower layer There are a shallow type that uses a special tool, a grounding type that places a grounding plate on the bottom of the pole hole, a special deep type, and other types of ground (ground) It is appropriately selected in consideration of cost and cost.

  The present applicant has proposed a grounding construction design support system that selects a grounding method that satisfies a specified value of grounding resistance (see Patent Document 1). The grounding construction design support system is a system that calculates the minimum number of grounding poles installed for each grounding method that satisfies a specified value and provides the operator with information on the grounding method that can be constructed.

JP 2006-79400 A

  However, since the grounding construction design support system is a system that aims to provide a grounding method that satisfies the specified value, when multiple grounding methods that satisfy the specified value are selected, the operator must select the multiple grounding methods that are selected. The optimum grounding method will be selected from among the construction methods. Therefore, when a plurality of applicable grounding methods are selected, there has been a demand for a grounding design support system with improved convenience in which these grounding methods can be compared and examined easily.

  Therefore, in view of such circumstances, an object of the present invention is to provide a grounding construction design support system capable of improving the convenience of designing the grounding construction.

  The grounding work design support system according to the present invention provides information on the specified value of the grounding resistance in order to compare and compare the grounding resistance values obtained by a plurality of grounding methods and the specified values to be satisfied by these grounding resistance values. An input means that can input information on the grounding method and information on the grounding resistance of the place where the grounding method is constructed, and an operation for calculating a predicted value of the grounding resistance for each grounding method based on the information input to the input means A means for comparing the predicted value of the grounding resistance for each grounding method calculated by the calculating means with a specified value derived from information on the specified value of the grounding resistance input by the input means, and a calculation by the calculating means When the predicted value of grounding resistance is displayed for each of the grounding methods that have been used, and when the predicted value of each grounding resistance is compared by the comparison means, In, characterized in that it comprises a display means for recognizable display state that can not be selected information about the predicted value of the unsuitable were determined to be ground resistance.

  According to such a configuration, the calculation means inputs the information regarding the specified value of the ground resistance, the information regarding the grounding method, and the information regarding the ground resistance of the place to the input means, thereby obtaining the predicted value of the ground resistance for each grounding method. Calculate. The comparison means compares the predicted value of the ground resistance calculated by the calculation means with the specified value. The display means that the comparison result compared by the comparison means is displayed together with the predicted value of the ground resistance displayed for each grounding method, so that the information regarding the predicted value of the ground resistance determined to be inappropriate by the comparison means cannot be selected. Is recognizable to the operator. The operator can select the ground resistance predicted value displayed in association with the grounding method other than the information related to the predicted value of the grounded resistance recognized as not being selectable, thereby improving the convenience of grounding design. Can be increased.

  In addition, according to the present invention, the display means can recognizablely indicate that the grounding method cannot be selected in the portion where the predicted value of the grounding resistance determined to be inappropriate by the comparing means is displayed. preferable.

  According to such a configuration, the operator can select the predicted value of the grounding resistance displayed in association with the grounding method other than the portion displayed so as to be recognizable that the selection cannot be performed, and perform the grounding work. The convenience of design can be enhanced.

  Further, according to the present invention, the calculation means can calculate the predicted value of the ground resistance for each number of poles of the ground electrode that can be paralleled in each of the plurality of grounding methods. It is preferable that comparison and display are possible for each number of poles of the ground electrodes that can be arranged in parallel in each method.

  According to such a configuration, the calculation means calculates the predicted value of the ground resistance for each number of ground electrode poles that can be paralleled in each of the plurality of grounding methods. The comparison means compares the predicted value of the ground resistance calculated by the calculation means with the specified value. The display means determined that the comparison means is unsuitable by displaying the comparison result compared by the comparison means together with the predicted value of the ground resistance displayed for each pole number of the ground electrodes that can be paralleled in each of the grounding methods. The operator can recognize that the information regarding the predicted value of the grounding resistance cannot be selected. The operator can make a selection based on the comparison result by the comparison means for each number of ground electrode poles that can be paralleled in each grounding method, and the grounding other than the information on the predicted value of the grounding resistance recognized as not being able to be selected. The predicted value of the grounding resistance displayed in correspondence with the number of poles of the grounding electrode of the construction method can be selected with reference, and the convenience of designing the grounding work can be enhanced.

  Further, according to the present invention, the input means can input information on a place where the grounding method is applied, and the comparing means is a selectable grounding derived from each grounding method and information on the place where the grounding method is executed. The display means can provide information on the predicted value of the grounding resistance determined to be inappropriate when it is determined that each grounding method is inappropriate as a result of comparison by the comparing means. It is preferable that the display state is such that it can be recognized that the selection cannot be made.

  According to such a configuration, the comparison unit compares whether the grounding method calculated by the calculating unit is a selectable grounding method derived from information regarding a place where the grounding method is applied. And as a result of the comparison, when it is determined that the comparison means is inappropriate, the display means displays the comparison result compared by the comparison means for each grounding method (or for each number of ground electrodes of each grounding method). By displaying together with the predicted value of the ground resistance, it is displayed so that the operator can recognize that the information regarding the predicted value of the ground resistance determined to be inappropriate by the comparison means cannot be selected. The operator is a grounding method that satisfies the specified value of the grounding resistance (and a grounding method that newly establishes the number of poles of the grounding electrode that satisfies the specified value), and a selectable grounding method that is derived from information on the location where the grounding method is to be constructed. This can improve the convenience of grounding design.

  Further, according to the present invention, the input means can input information related to restrictions on a place where the grounding method is applied, and the arithmetic means can perform grounding for each number of poles of the ground electrode that can be paralleled in each of the plurality of grounding methods. The predicted value of the resistance can be calculated, and the comparing means can calculate the number of poles of the grounding electrodes that can be paralleled in each grounding method and the number of selectable grounding electrodes derived from information on the restrictions on the place where the grounding method is applied. The display means, when the number of poles of each ground electrode is compared by the comparison means and is determined to be inappropriate, the information on the predicted value of the ground resistance determined to be inappropriate It is preferable that the display state is such that it is possible to recognize that the user cannot select.

  According to such a configuration, the comparison means is configured such that the number of poles of the grounding electrodes that can be parallelized for each grounding method calculated by the computing means is derived from information on the restrictions on the place where the grounding method is applied. It is judged whether it is. As a result, when it is determined that the comparison means is inappropriate, the display means displays the comparison result compared by the comparison means for each grounding method (or for each number of poles of the ground electrode of each grounding method). By displaying together with the predicted value, it is displayed so that the operator can recognize that the information regarding the predicted value of the grounding resistance determined to be inappropriate by the comparison means cannot be selected. The operator is a grounding method that satisfies the specified value of the grounding resistance (and a grounding method that newly establishes the number of poles of the grounding electrode that satisfies the specified value), and a selectable grounding method that is derived from information on the restrictions on the grounding method. This can improve the convenience of grounding design.

  According to the present invention, it is preferable that the display means displays the construction cost for the grounding method corresponding to the predicted value of the ground resistance in association with the predicted value of the ground resistance.

  According to this configuration, the operator selects the grounding method that satisfies the specified value of the grounding resistance (and the grounding method that newly installs the number of poles of the ground electrode that satisfies the specified value) with reference to the construction cost. It is possible to improve the convenience of designing the grounding work.

  As described above, the grounding construction design support system according to the present invention has an excellent effect that the convenience of designing the grounding construction can be enhanced.

The block diagram explaining the structure of the grounding construction design support system which concerns on this invention is shown. (A) is an explanatory view of an initial input screen of the grounding work design support system according to the embodiment, (b) is a list of diameters of various ground electrodes, and (c) is a list of correction coefficients. A table is shown. (A) And (b) shows the side view explaining the positional relationship of the existing ground pole and new ground pole of the grounding construction design support system which concerns on the embodiment, (b) is the grounding which concerns on the embodiment The top view explaining the positional relationship of the existing ground pole of a construction design support system and a new ground pole is shown. Explanatory drawing of the main display screen of the grounding construction design support system which concerns on the embodiment is shown. (A) shows the contents of the regional suitability determination table of the grounding work design support system according to the embodiment, (b) shows the contents of the geological suitability determination table, and (c) shows the geological suitability determination table. Indicates the contents of the table. The flowchart of the calculating means of the grounding construction design support system which concerns on the embodiment is shown. The flowchart of the calculating means of the grounding construction design support system which concerns on the embodiment is shown. The flowchart of the comparison means of the grounding construction design support system which concerns on the embodiment is shown. The flowchart of the comparison means of the grounding construction design support system which concerns on the embodiment is shown. The flowchart of the comparison means of the grounding construction design support system which concerns on the embodiment is shown. The flowchart of the display means of the grounding construction design support system which concerns on the embodiment is shown. The list of the resistivity of the soil used with the grounding construction design support system which concerns on other embodiment is shown.

  A grounding construction design support system according to an embodiment of the present invention will be described with reference to the drawings. First, the grounding method of the grounding work to be compared and examined by this grounding work design support system will be described. As a construction method (grounding method) of the grounding work, for example, a connection type (including a connection type with a disc), a deep hitting type, a shallow hitting type, a disc (grounding plate) type, a top point type, a multi-earth type, etc. There is.

  The connection type is a method in which a grounding electrode is manually driven to a depth of about 3 m using a hammer or an electric pick. The connection type ground electrode is a ground electrode capable of connecting rod-shaped conductors in the axial direction. Moreover, the connection type ground electrode with a disk is a ground electrode capable of connecting a planar ground plate to the upper end of the connection type ground electrode. The connection type is particularly suitable for relatively soft ground such as viscosity and general soil properties.

  The deep punching method is a method in which a grounding electrode is driven by mechanical punching to a depth of about 3.5 to 5 m using a dedicated tool. The deep-fitting type is particularly suitable for soils with mixed rocks and cobbles such as riverbeds. The shallow type is a type in which a grounding electrode is driven manually or mechanically to a depth of about 1.5 m using a dedicated tool. The shallow type is particularly suitable for the ground having a hard layer such as a bedrock in the lower layer of the ground. The disc type is a system in which, for example, a circular grounding plate is installed at the bottom of a hole in which a utility pole is embedded when a new utility pole is built, and this grounding plate is used as a grounding electrode.

  The top point type is a method of excavating the surroundings of a grounding rod embedded site, pouring a grounding resistance reducing agent into the excavation hole, and driving a grounding electrode for the top point. The top-point ground electrode is a rod-shaped ground electrode having a conical top point having conductivity at the tip. The top point type is particularly suitable for soft geological boards such as sand, clay, and general soil. The multi-earth type is a method in which a grounding rod buried portion is excavated using a driving pipe or a cross bit (for rock crushing), a grounding resistance reducing agent is poured into a drilling hole, and a grounding electrode is driven. The multi-earth type is suitable for high geological boards with high resistivity.

  Next, the configuration of the grounding work design support system according to the embodiment will be described with reference to FIGS. As shown in FIG. 1, the grounding construction design support system 1 includes an input unit 2 that can input a condition necessary for calculating a grounding resistance value, and a plurality of groundings based on information input to the input unit 2. The calculation means 3 for calculating the predicted value of the ground resistance obtained for each construction method, the comparison means 4 for comparing the predicted value of the ground resistance for each grounding method calculated by the calculation means 3 and the specified value, and The display means 5 which can display a grounding resistance value, and the construction amount memory | storage part 6 which memorize | stores the construction amount determined for every pole number of each grounding construction are provided. The input unit 2, the calculation unit 3, the comparison unit 4, the display unit 5, and the construction amount storage unit 6 may be mounted on the same computer, or each may be installed on a computer connected to a network. May be implemented.

  The input means 2 is a new ground electrode (hereinafter referred to as “new electrode”) in order to compare and compare the respective ground resistance values obtained for each of the plurality of grounding methods and the specified values to be satisfied by these ground resistance values. Geological information input unit 21 capable of inputting information on the grounding resistance of the geology where the construction is to be performed (information regarding grounding resistance of the place where the grounding method is to be constructed) and a grounding method information input unit 22 capable of inputting information regarding the grounding method of the newly installed pole An existing pole resistance value input unit 23 capable of inputting a measured value of the ground resistance of an existing ground electrode (hereinafter referred to as “existing electrode”), a geological information input unit 21, a grounding method information input unit 22, and And a comparison condition input unit 24 capable of inputting a comparison condition defined for comparing each predicted value of the ground resistance calculated from the information input to the existing resistance value input unit 23. Each input unit 21, 22, 23, 24 of the input means 2 specifically refers to a predetermined area displayed on the screen of the display means 5, and uses the input device such as a keyboard or a mouse to specify the predetermined area. And a combination of input / output devices configured to be able to input various information by inputting predetermined information.

  As shown in the example of the initial setting screen shown in FIG. 2A, the geological information input unit 21 is configured to ground a grounding electrode (hereinafter referred to as a “peripheral pole”) installed around a place where a new pole is to be constructed. Peripheral electrode grounding method input unit 211 capable of inputting a construction method, peripheral electrode resistance value input unit 212 capable of inputting a measured value R of the grounding resistance of the peripheral electrode, and peripherals capable of inputting the length s of the ground electrode of the peripheral electrode And a pole electrode length input unit 213.

  The peripheral electrode grounding method input unit 211 is a parameter input to specify the diameter Φ of the ground electrode of the peripheral electrode. In the present embodiment, the diameter Φ of the ground electrode is determined as a default value for each grounding method, and therefore can be specified by inputting the type of the grounding method.

  As shown in FIG. 2A, the grounding method information input unit 22 includes a pole interval input unit 221 that inputs a pole interval L of the ground electrode (new pole). In this embodiment, as shown in the explanatory view for explaining the buried position of the ground electrode shown in FIGS. 3A and 3B, the new electrode is 1 or 2 perpendicular to the axial direction from the ground electrode 101 of the existing electrode. The above ground electrodes 100 are arranged in a straight line. The pole interval L refers to the interval between the ground electrodes 100, 100, 101 at that time.

  As shown in FIGS. 1 and 2A, the existing pole resistance value input unit 23 is an input unit capable of inputting a measured value of the ground resistance of the existing pole. When calculating the predicted value of the ground resistance of the new pole, the existing pole resistance value input unit 23 synthesizes the measured value of the ground resistance of the existing pole with the predicted value of the ground resistance of the new pole to obtain the combined ground resistance value. Used to calculate.

  As shown in FIG. 1, the comparison condition input unit 24 includes a resistance value comparison condition input unit 241 that can input a specified value to be satisfied by a predicted value of the combined ground resistance of the existing pole and the new pole, and a grounding method for the new pole. Construction location condition input section that can input information on the location where the construction method of the new pole is constructed in order to compare whether it is a selectable grounding method suitable for the construction site, texture, or geological construction site 242 and a constraint condition input unit 243 capable of inputting new pole conditions (information on restrictions on the place where the construction method is constructed) in order to compare the grounding method that can achieve the constraints when constructing each ground method. Prepare.

  As shown in the example of the main screen shown in FIG. 4, the resistance value comparison condition input unit 241 has a facility information input unit 241a that can input the type of electrical equipment to be installed, and a ground type that can input the ground type of the electrical facility. An input unit 241b and a specified value input unit 241c capable of inputting a specified value of the grounding resistance specified for the electrical equipment to be grounded are provided.

  As shown in FIG. 4, the construction site condition input unit 242 includes an area input unit 242a capable of inputting an area where a new pole is to be embedded, a ground input unit 242b capable of inputting a ground where the new pole is to be installed, and a new pole. And a geological input unit 242c capable of inputting the geology to be buried.

  The constraint condition input unit 243 is capable of inputting an increaseable distance Lmax (see FIGS. 3A and 3B) of the ground electrode when the ground electrode is embedded in a straight line. An input unit 243a is provided.

  The calculation means 3 includes a condition setting unit 31 that sets a calculation condition for calculating a predicted value of the ground resistance of the new electrode, and a ground resistance that calculates a predicted value of the ground resistance based on the calculation condition set by the condition setting unit 31 A calculation unit 32 and a storage unit 33 that stores the calculation condition set by the condition setting unit 31 and the predicted value of the ground resistance for each number of ground poles of each grounding method calculated by the ground resistance calculation unit 32 are provided. The calculation means 3 is specifically a computer, and in particular, the condition setting unit 31 and the ground resistance calculation unit 32 are CPUs (control / calculation devices), and the storage unit 33 is a read / write free RAM or a read-only RAM. A main storage device such as a ROM or an auxiliary storage device.

The condition setting unit 31 is necessary for calculating the predicted value of the combined ground resistance with the existing pole based on the information input from the geological information input unit 21, the grounding method information input unit 22, and the existing pole resistance value input unit 23. Set the parameters. Specifically, first, the condition setting unit 31 sets the value of the resistivity ρ of the soil to be buried, which is a parameter necessary for calculating the ground resistance. In the present embodiment, the soil resistivity ρ is calculated from the following equation.

  In addition, the condition setting unit 31 sets a parameter for calculating a predicted value of the ground resistance for each number of new poles that increases to the existing pole for each grounding method, and sets the ground resistance calculation unit 32 to each calculation condition. Based on this, the predicted value of the ground resistance is calculated. That is, in this embodiment, the condition setting unit 31 uses seven types of grounding methods (a connected grounding method that does not use a grounding resistance reducing agent, a connected grounding method that uses a grounding resistance reducing agent, and a grounding resistance reducing agent. When the number of newly installed poles is increased to 1 to 5 poles for each of the existing poles, the grounding method with a disk, the grounding method with a disk using a grounding resistance reducing agent, the top point method, and the multi method. Sets the condition for calculating the composite ground resistance value.

  In addition, the condition setting unit 31 receives the distance L between the ground electrodes of the grounding electrode from the grounding method input unit 22, and also receives the measured value of the grounding resistance of the existing electrode from the existing pole resistance value input unit 23. It is stored in the condition memory 331.

  The ground resistance calculation unit 32 receives, from the condition setting unit 31, parameters for the number of poles of the new poles that are added to the existing poles for each grounding method, calculates a predicted value of the ground resistance based on each parameter, and calculates the calculation The predicted value of the ground resistance is stored in the calculation result memory 333.

  That is, the ground resistance calculation unit 32 first calculates the distance L between the ground electrodes of the ground electrode, the measured value r of the ground resistance of the existing electrode, and the grounding method from the calculation condition memory 331 via the condition setting unit 31. Information for identification and the number of poles Z of the new pole are input.

Then, the ground resistance calculation unit 32 calculates the predicted value R1 of the ground resistance per new pole from the resistivity ρ of the soil, the length L of the ground electrode of the new pole, and the diameter φ of the ground electrode of the new pole. Is calculated based on the following formula.

  In addition, the predicted value R1 of the grounding resistance per pole of the newly-connected grounding method using the grounding resistance reducing agent and the jointing grounding method with a disk is the value in the connecting grounding method not using the grounding resistance reducing agent. Calculation is performed by correcting the calculated value with the reduction rate of each grounding method. The reduction rate of each grounding method is 0.8 for the connection type grounding method using a grounding resistance reducing agent and the connecting type grounding method with a disc that does not use a grounding resistance reducing agent. In the case of the connection type grounding method, 0.7.

The ground resistance calculation unit 32 determines the poles of the new pole from the predicted value R1 of the ground resistance per one pole of the new pole, the number Z of the new poles, and the correction coefficient k that can be determined from the pole number Z and the pole interval L. A predicted value R2 of the ground resistance per several Z is calculated based on the following mathematical formula. The correction coefficient k is stored in the calculation condition memory 331, and specifically has a value shown in FIG.

The ground resistance calculation unit 32 calculates the predicted value R3 of the combined ground resistance of the existing pole and the new pole from the predicted value R2 of the ground resistance of the new pole and the measured value r of the ground resistance of the existing pole by the following formula. Calculate based on

  The storage unit 33 includes a calculation condition memory 331 for storing parameters necessary for calculating a combined grounding resistance value of the existing pole and the new pole, and a peripheral pole input from the geological information input unit 21 by the condition setting unit 31. A ground electrode diameter conversion table 332 that can be converted from the grounding method to the diameter of the ground electrode of the grounding electrode used in the grounding method, and a new installation that increases the number of existing poles for each grounding method calculated by the grounding resistance calculation unit 32 And a calculation result memory 333 for storing a predicted value of the grounding resistance for each number of poles.

  The comparison unit 4 stores information on the comparison condition and the comparison unit 41 that compares the number of poles of the newly installed pole that is increased to the existing pole for each grounding method according to the condition input to the comparison condition input unit 24. And a storage unit 42 for storing the result of comparison by the comparison unit 41. Specifically, the comparison unit 4 is the same computer as the calculation unit 3. In particular, the comparison unit 41 is a CPU (control / calculation device), and the storage unit 42 is a main storage device or an auxiliary storage device. .

  The comparison unit 41 inputs a resistance value comparison unit 411 that compares the predicted value of the ground resistance calculated by the calculation unit 3 with a specified value input from the resistance value comparison condition input unit 241, and an input from the construction site condition input unit 242. The construction place comparison unit 412 for comparing with the grounding method defined for each region, geology, and geology based on the determined region, geology, and geology, and the constraint from the additional possible distance that is the constraint condition input from the constraint condition input unit 243 And a constraint condition comparison unit 413 that compares the condition with the condition.

  The resistance value comparison unit 411 is connected to the predicted value of the ground resistance calculated by the calculation means 3 for each number of poles of the newly installed pole that is added to the existing pole for each grounding method and the ground input from the resistance value comparison condition input unit 241. Compare the resistance with the specified value. As a result of the comparison, when the resistance value comparison unit 411 determines that the resistance value is not appropriate because the specified value is insufficient, the resistance value comparison unit 411 corresponds to information regarding the predicted value of the ground resistance determined to be inappropriate. The attached identification information is stored in the comparison result memory 425.

  The construction site comparison unit 412 stores, in the storage unit 42, a region that is input from the region input unit 242 a of the construction site condition input unit 242 for each number of poles of the newly installed pole that is added to the existing pole for each grounding method. Based on the regional suitability determination table 422 (see FIG. 5A), it is compared whether the grounding method can be selected. In addition, the construction place comparison unit 412 stores, in the storage unit 42, the ground input from the ground input unit 242 b of the construction site condition input unit 242 for each number of poles of the new pole that is increased to the existing pole for each grounding method. Based on the ground suitability determination table 423 (see FIG. 5B), it is compared whether the grounding method can be selected. In addition, the construction site comparison unit 412 stores, in the storage unit 42, the geology input from the geological input unit 242c of the construction site condition input unit 242 for each number of poles of the newly installed pole that is added to the existing pole for each grounding method. Based on the geological suitability determination table 424 (see FIG. 5C), it is compared whether the grounding method can be selected. Note that “depending on geology” shown in the selectable grounding method in FIGS. 5A and 5B can be selected from the geological suitability determination table 424 according to “geology” input to the geological input unit 242c. It means that a proper grounding method is selected.

  As a result, when the construction site comparison unit 412 determines that the grounding method is not selectable but is unsuitable, the construction site comparison unit 412 responds to information related to the predicted value of the ground resistance determined to be unsuitable. The attached identification information is stored in the comparison result memory 425.

  For each grounding method, the constraint condition comparison unit 413 compares the number of newly installed poles with the number of newly installed poles and the number of poles that can be struck by increasing the number of newly installed poles. The number of poles at which the number of poles of the newly installed pole can be increased is based on the additional hittable distance input from the constraint condition input unit 243 and the pole interval stored in the calculation condition memory 331 of the storage unit 33 of the calculation means 3. As a result of comparison, the constraint condition comparison unit 413 determines that the constraint condition comparison unit 413 is inappropriate because it exceeds the number of poles that can be increased. Identification information associated with information relating to the predicted value is stored in the comparison result memory 425.

  The storage unit 42 includes a resistance value comparison condition input unit 241, a construction site condition input unit 242, and a comparative study memory 421 that stores information input from the constraint condition input unit 243 via the comparison unit 41, and for each region. The area suitability determination table 422 (see FIG. 5 (a)) that prescribes a grounding method that can be selected, and the ground suitability determination table 423 (see FIG. 5 (b)) that prescribes a grounding method that can be selected for each ground. And a geological suitability determination table 424 (see FIG. 5C) that defines a grounding method that can be selected for each geology, and a comparison result memory 425 that stores a result of comparison by each comparison unit 41. The comparison result memory 425 is a storage area for storing the result of the comparison performed by the comparison unit 41 in association with each grounding electrode to be added in each grounding method.

  The display unit 5 includes a display unit 51 such as a display having a display screen for displaying calculation results and the like, and a resistance display processing unit 52 that displays predicted values of the ground resistance for each of a plurality of grounding methods calculated by the calculation unit 3. And the construction amount display unit 53 for displaying the construction amount for each of the plurality of grounding methods calculated by the calculating unit 3 and the predicted value of each grounding resistance is determined to be inappropriate by the comparison unit 4 And a non-selectable display processing unit 54 that makes it possible to recognize that the information regarding the predicted value of the grounding resistance determined to be cannot be selected. The display unit 51 of the display unit 5 is specifically an output device such as a display. Specifically, the resistance display processing unit 52, the construction amount display processing unit 53, and the non-selectable display processing unit 54 of the display unit 5 are the same computer as the calculation unit 3 and the comparison unit 4.

  The resistance display processing unit 52 acquires the predicted value of the ground resistance as the calculation result from the calculation result memory 333 and transmits it to the display unit 51 to correspond to the display position of the number of poles for each grounding method of the display unit 51. To display the predicted value.

  The construction amount display processing unit 53 acquires the construction amount determined according to the number of poles of each grounding method from the construction amount storage unit 6, and executes the construction according to the display position of the number of poles for each grounding method of the display unit 51. Display the amount.

  The non-selectable display processing unit 54 acquires identification information associated with information related to the predicted value of the ground resistance determined to be inappropriate as the comparison result from the comparison result memory 425. Then, the non-selectable display processing unit 54 can recognize that the grounding method with the increased number of poles cannot be selected in the portion of the display unit 51 that displays information on the predicted value of the grounding resistance corresponding to the identification information. To display the correct display state.

  Specifically, as shown in the main display screen shown in FIG. 4, the non-selectable display processing unit 54 has a mesh in the background of the portion displaying the predicted value of the ground resistance, which is the calculation result of the grounding method with the increased number of poles. Multiply and display the predicted value of the grounding resistance, which is the result of the grounding method with another number of additional poles, separately from the displayed part.

  Note that a frame A illustrated in FIG. 4 is a portion that is determined to be inappropriate because the predicted value of the ground resistance does not satisfy the specified value as a result of the comparison by the resistance value comparison unit 411. The frame B shown in the figure is a portion determined to be unsuitable as a result of comparison by the construction site comparison unit 412 because the grounding method is not a selectable grounding method. The frame C shown in the figure is not suitable because the number of poles of the newly installed pole exceeds the number of poles that can be increased (= strikeable distance Lmax / pole interval L) as a result of comparison by the constraint comparison unit 413. It is the part judged to be.

  Next, control of the calculation means 3 of the grounding construction design support system 1 according to the present embodiment will be described with reference to the flowcharts shown in FIGS. First, an operator who operates the grounding construction design support system 1 inputs necessary information from the initial setting screen shown in FIG. Then, the type of the grounding electrode is input to the peripheral electrode grounding method input unit 211 of the geological information input unit 21, the measured value of the grounding resistance of the peripheral electrode is input to the peripheral electrode resistance value input unit 212, and the peripheral electrode length is input. When the length of the ground electrode of the peripheral electrode is input to the unit 213 (see FIG. 6, YES in S101), the condition setting unit 31 of the calculation means 3 stores the type of the ground electrode in the calculation condition memory 331 ( Along with (S102), the diameter of the ground electrode corresponding to the grounding method of the peripheral electrode is acquired from the ground electrode diameter conversion table 332 of the storage unit 33 (S103). Then, the condition setting unit 31 calculates the resistivity of the soil from the measured value of the grounding resistance of the peripheral pole and the length and diameter of the grounding electrode of the peripheral pole, and stores the resistivity of the soil in the calculation condition memory 331. (S104).

  Subsequently, the distance between the ground electrodes (and between the existing pole and the new pole) is input from the pole distance input section 221 of the grounding method information input section 22, and the ground resistance of the existing pole is input from the existing pole resistance value input section 23. When the measured value is input (YES in S105), the condition setting unit 31 of the calculation unit 3 stores the measured values of the pole interval and the ground resistance of the existing pole in the calculation condition memory 331 (S106).

  The condition setting unit 31 sets the target grounding method to be calculated as the first pole (M = 1) of the first grounding method (N = 1) (see FIG. 7, S201), and the calculation condition memory 331 via the condition setting unit 31. Various parameters are acquired from the above, and the ground resistance calculation unit 32 is caused to calculate the predicted value of the ground resistance (S202 to S207).

  Specifically, the ground resistance calculation unit 32 obtains the soil resistivity, the length and diameter of the ground electrode of the new pole (S202), and calculates and calculates the predicted value R1 of the ground resistance per pole. The data is stored in the condition memory 331 (S203). The ground resistance calculation unit 32 acquires the predicted value R1 of the ground resistance per pole and the correction coefficient from the calculation condition memory 331 (S204), and calculates the predicted value R2 of the ground resistance of the new pole (S205). Then, the ground resistance calculation unit 32 acquires the measured value of the ground resistance of the existing pole from the calculation condition memory 331 (S206), and combines the ground resistance value of the existing pole and the ground resistance value of the new pole. The predicted value R3 of the value is calculated, and the predicted value R3 of the combined ground resistance value is stored in the calculation result memory 333 (S207).

  When the ground resistance calculation unit 32 finishes calculating the predicted value R3 of the combined ground resistance value, the condition setting unit 31 calculates the predicted value R3 of the combined ground resistance value of the next number of poles (M + 1) to the ground resistance calculation unit 32. And repeat until the last number of poles (in this embodiment, up to M = 5) (S204 to S209).

  When the ground resistance calculation unit 32 finishes calculating the predicted value R3 of the combined ground resistance value up to the last number of poles, the condition setting unit 31 sets the predicted value R3 of the combined ground resistance value of the next grounding method (N + 1) to the ground resistance. The calculation unit 32 calculates and repeats until the last grounding method (in this embodiment, up to M = 6) (S202 to S211). In this embodiment, the order of the grounding method shown in FIG. 4 (connected grounding method not using a grounding resistance reducing agent (N = 1), connecting grounding method using a grounding resistance reducing agent (N = 2), Connection type grounding method with disk without using ground resistance reducing agent (N = 3), Connection type grounding method with disk using grounding resistance reducing agent (N = 4), top point method (N = 5), and multi Construction method (N = 6)).

  Next, control of the comparison unit 4 of the grounding construction design support system 1 according to the present embodiment will be described with reference to the flowcharts shown in FIGS. First, when the operator inputs a specified value of the ground resistance from the resistance value comparison condition input unit 241 (see FIG. 8, YES in S301), the resistance value comparison unit 411 of the comparison unit 41 of the comparison unit 4 A specified value is input from the value comparison condition unit 241 and stored in the comparison study memory 421 (S302).

  The resistance value comparison unit 411 sets the target grounding method to be compared as the first pole (M = 1) of the first (N = 1) grounding method (S303), and acquires the predicted value of the combined grounding resistance from the calculation result memory 333. . (S304) The resistance value comparison unit 411 compares the predicted value of the combined ground resistance with the specified value, and stores the comparison result in the comparison result memory 425 (S305). When the resistance value comparison unit 411 finishes comparing the predicted value of the combined ground resistance with the specified value, the resistance value comparing unit 411 compares the predicted value of the combined ground resistance value of the next pole number (M + 1) with the specified value. Then, the process is repeated up to the last number of poles (in this embodiment, up to M = 5) (S304 to S308).

  When the resistance value comparison unit 411 finishes comparing the predicted value of the combined grounding resistance value and the specified value up to the last number of poles, the resistance value comparing unit 411 predicts the combined grounding resistance value of the next grounding method (N + 1). And the specified value are compared and repeated until the last grounding method (in this embodiment, up to M = 6) (S304 to S310).

  On the other hand, when the operator inputs information related to “region”, “geometry”, and “geology” from the construction place condition input unit 242 (see FIG. 9, YES in S401), the construction of the comparison unit 41 of the comparison unit 4 is performed. The place comparison unit 412 receives information related to “region”, “geometry”, and “geology” from the construction place condition input unit 242, and stores the information in the comparison review memory 421 (S402).

  The construction site condition comparison unit 412 sets the target grounding method to be compared as the first pole (M = 1) of the first grounding method (N = 1) (S403), and determines the appropriateness of the region from the input “region” information. A grounding method selectable based on 422 is compared (S404). The construction site condition comparison unit 412 stores the comparison result in the comparison result memory 425 (S405). When the construction place condition comparison unit 412 finishes the comparison, the other pole number (M + 1) also stores the same comparison result in the comparison result memory 425 (S405 to S406) until the last pole number (in this embodiment, Repeat until M = 5 (S405 to S407).

  When the construction site condition comparison unit 412 completes the comparison to the last number of poles (YES in S407), it moves to the next grounding method (N + 1) and repeats until the last grounding method (up to M = 6 in this embodiment). (S404 to S410).

  Further, when the operator inputs information related to the “possible extra stroke distance” from the constraint condition input unit 243 (see FIG. 10, YES in S501), the constraint condition comparison unit 413 of the comparison unit 41 of the comparison unit 4 Information relating to the “possible extra stroke distance” is input from the constraint condition input unit 243, and is stored in the comparison study memory 421 (S502).

  The constraint condition input unit 243 acquires information on the pole interval from the calculation condition memory 331 (S503), calculates the number of poles that can be increased, and stores it in the comparative study memory 421 (S504).

  The constraint condition comparison unit 412 sets the target grounding method to be compared as the first pole (M = 1) of the first grounding method (N = 1) (S505), compares it with the number of poles that can be increased, and compares the comparison results. The result is stored in the result memory 425 (S506). When the comparison is completed, the constraint condition comparison unit 412 moves to the next number of poles (M + 1) and repeats up to the last number of poles (in this embodiment, up to M = 5) (S506 to S509).

  When the comparison to the last pole number is completed (YES in S509), the constraint condition comparison unit 412 moves to the next grounding method (N + 1) and repeats until the last grounding method (in this embodiment, up to M = 6) ( S506 to S511).

  Next, control of the display means 5 of the grounding work design support system 1 according to the present embodiment will be described with reference to the flowchart shown in FIG. When the predicted value of the ground resistance is stored in the calculation result memory 333 of the calculation means 3 (S106 in FIG. 6), the display means 5 reads from the calculation result memory 333 for each grounding method and for each number of poles of the new pole. The predicted value of the ground resistance is acquired (see FIG. 11, S601), and the acquired predicted value is displayed on the portion of the display unit 51 corresponding to the number of poles of the grounding method (S602).

  On the other hand, when the display unit 5 finishes storing the comparison result in the comparison result memory 425 of the comparison unit 4 (S310 in FIG. 8, S410 in FIG. 9, and S511 in FIG. 10), the display unit 5 displays the comparison result from the comparison result memory 425. It is acquired (see FIG. 11, S701), and is shaded and displayed on the portion of the display unit 51 corresponding to the number of poles of the grounding method of the comparison result (S702).

  In this way, the calculation means 3 calculates the predicted value of the ground resistance for each number of ground electrode poles that can be paralleled in each of the plurality of grounding methods. The comparison unit 4 compares the predicted value of the ground resistance calculated by the calculation unit 3 with the specified value. The display means 5 is not suitable for the comparison means 4 by displaying the comparison result compared by the comparison means 4 together with the predicted value of the ground resistance displayed for each pole number of the ground electrodes that can be paralleled in each of the grounding methods. It is displayed to the operator that the information regarding the predicted value of the ground resistance determined to be unselectable can be recognized by the operator. The operator can make a selection based on the comparison result by the comparison means 4 for each number of ground electrode poles that can be paralleled in each of the grounding methods. The predicted value of the grounding resistance displayed in correspondence with the number of poles of the grounding electrode of the grounding method can be selected with reference, and the convenience of designing the grounding work can be enhanced.

  In addition, the operator can select the ground resistance predicted value displayed in association with the grounding method other than the part that is displayed so as to be able to recognize that the selection cannot be made, so that the design of the grounding work is convenient. Can increase the sex.

  Moreover, the comparison means 4 compares whether the grounding method calculated by the calculating means 3 is a selectable grounding method derived from information regarding the place where the grounding method is applied. If the comparison means 4 is determined to be inappropriate as a result of the comparison, the display means 5 predicts the ground resistance by displaying the comparison result compared by the comparison means 4 for each number of ground electrodes of each grounding method. By displaying the value together with the value, it is displayed so that the operator can recognize that the information regarding the predicted value of the grounding resistance determined to be inappropriate by the comparison unit 4 cannot be selected. The operator can select a selectable grounding method that is derived from information on the location where the grounding method is to be constructed, and is a grounding method that newly establishes the number of poles of the grounding electrode that satisfies the specified value of the grounding resistance. Design convenience can be improved.

  Further, the comparison means 4 is the number of selectable ground electrode poles derived from the information on the restrictions on the place where the ground construction method is applied, in which the number of parallel ground electrodes of each ground construction method calculated by the calculation means 3 is calculated. Determine whether. And as a result, when it is judged that the comparison means 4 is unsuitable, the display means 5 displays the comparison result compared by the comparison means 4 together with the predicted value of the ground resistance displayed for each pole number of the ground electrode of each grounding method. By displaying, it is displayed so that the operator can recognize that the information regarding the predicted value of the grounding resistance determined to be inappropriate by the comparison unit 4 cannot be selected. The operator can select a selectable grounding method, which is a grounding method that newly establishes the number of poles of the grounding electrode that satisfies the specified value, and that is derived from information on restrictions on the grounding method. Can increase the sex.

  In addition, the operator can select the grounding method that newly establishes the number of poles of the grounding electrode that satisfies the specified value of grounding resistance, making it possible to select the construction cost with reference to the convenience of designing the grounding work. Can do.

  In addition, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the summary of this invention.

  In the grounding design support system 1 according to the above embodiment, the measured value of the grounding resistance of the buried grounding electrode is insufficient for the required grounding resistance, and the number of grounding poles is increased to satisfy this. An example has been described, but the present invention is not limited to this. For example, the present invention can be applied even when a new grounding work is performed. At this time, it is not necessary to input the measured value of the grounding resistance of the existing grounding electrode to the input unit 2, and the calculating unit 3 does not need to calculate the combined grounding resistance value with the existing grounding electrode.

  The grounding construction design support system 1 according to the above embodiment shades the background of the display unit 51 of the display unit 5 on which the predicted value of the grounding resistance determined to be inappropriate by the calculation unit 4 is displayed. Thus, the example in which the display state is recognized so that the predicted value of the ground resistance cannot be selected has been described, but the present invention is not limited to this. For example, the display unit emphasizes the background other than the portion of the display unit 51 on which the predicted value of the ground resistance determined to be inappropriate by the calculation unit 4 is displayed, so that the ground resistance is not emphasized. It is possible to make the display state recognizable so that the predicted value cannot be selected. In addition, the recognizable display state may be a state in which the predicted value of the grounding resistance and the construction amount are not displayed, or in a state in which the displayed character and background color are different from other characters and background. There may be.

  Although the grounding construction design support system 1 according to the above embodiment has been described as an example in which the possible increase distance is a separation distance from the obstacle X (see FIG. 3B) when arranged in a straight line from the utility pole. However, the present invention is not limited to this. For example, when the range that can be increased is an area that extends in a planar shape from the utility pole, the possible increase distance is the distance from the existing pole (or utility pole) to the obstacle, etc., from the position of the utility pole or existing pole. The predicted value of the grounding resistance may be calculated for the case where they are evenly arranged on the circumference having the possible increase distance as a radius.

  The grounding construction design support system 1 according to the above embodiment uses the number of grounding electrodes that can be increased in the number of newly installed poles as a constraint condition, and in order to calculate this constraint condition, the information on the limitation on the distance that can be increased in the ground electrode. However, the present invention is not limited to this example. For example, if the constraint condition includes interference with an obstacle buried in the ground, the input means can input the horizontal distance from the obstacle buried in the ground as information related to the constraint. Alternatively, the comparison means may be configured to determine that the grounding method in which the grounding electrode is located at the position of the obstacle calculated from the horizontal distance is inappropriate. In addition, as a restriction condition, the ground resistance reducing agent is used in “wells for drinking water”, “where there is a possibility that the ground resistance reducing agent may flow into ponds where fish are raised,” “tabata”, and “the root of the garden tree”. If the ground is not used, the input means will be the ground where the grounding method will be constructed, "wells for drinking water", "where the ground resistance reducing agent may flow into ponds where fish are raised" , Including "Tabata" and "Garden tree roots", this may be input as information regarding constraints, and when the new pole is installed on these grounds, the comparison means may include a ground resistance reducing agent in the grounding method. You may comprise so that it may judge that the grounding method contained is unsuitable.

  In the ground construction design support system 1 according to the above embodiment, the example in which the input unit 2 can input the pole interval of the ground electrode as information on each grounding method has been described. However, the present invention is not limited to this. For example, the input means can input the diameter and length of the ground electrode of each grounding method, the usage amount of the ground resistance reducing agent, and the like, and the calculation means can calculate the predicted value of the ground resistance in consideration of these. You may do it.

  The grounding work design support system 1 according to the above embodiment can input the measured value, length, and type of grounding method of the peripheral pole as information on the grounding resistance of the place where the input means 2 constructs each grounding method. Although a specific example has been described, the present invention is not limited to this. For example, the input means may be capable of directly inputting soil resistivity.

  In the grounding work design support system 1 according to the embodiment, the geological information input unit 21 is estimated from the conditions of the peripheral poles (the measured value R of the grounding resistance, the length S of the peripheral poles, and the type of the peripheral poles). The example in which the ground resistance value is calculated based on the resistivity has been described, but the present invention is not limited to this. For example, the geological information input unit may calculate the predicted value of the grounding resistance by appropriately inputting the soil resistivity ρ to the input unit 2 based on the type of soil based on the list shown in FIG. Further, the soil resistivity ρ may be a resistivity obtained by back-calculating from the ground resistance value averaged from the ground resistance values of a plurality of existing ground electrodes for each kind of soil.

  In the ground construction design support system 1 according to the above embodiment, the example in which the diameter of the ground electrode is set based on the type of the ground electrode has been described, but the present invention is not limited to this. For example, the input unit may include an input unit that can directly input the diameter of the ground electrode, and the calculation may be performed based on the diameter of the ground electrode input from the input unit.

  In the grounding construction design support system 1 according to the above embodiment, the example in which the grounding method information input unit 22 includes the pole interval input unit 221 capable of inputting the pole interval between the ground electrodes has been described, but the present invention is not limited thereto. Absent. For example, the grounding method information input unit 22 may include an installation electrode length input unit capable of inputting the length of the ground electrode used for each grounding method. By doing in this way, the calculating means can calculate the predicted value of the grounding resistance based on the length of the grounding electrode input for each grounding method.

  In the grounding construction design support system 1 according to the above embodiment, the example in which the specified value of the grounding resistance is directly input (manually input) to the specified value input unit 241c of the resistance value comparison condition input unit 241 has been described. It is not something. For example, the specified value of the ground resistance may be calculated from information on the specified value of the ground resistance, for example, the electrical equipment input to the equipment information input unit 241a and the ground type input from the ground type input information 241b. Good.

  In the grounding construction design support system 1 according to the above embodiment, the grounding method that can be compared is described as the connection type grounding method, the connection type grounding method with a disk, the multi-earth type grounding method, and the top point method. However, the present invention is not limited to this. For example, the grounding method may include other grounding methods, and specifically may include a shallow grounding method or a deep grounding method.

  In the grounding construction design support system 1 according to the above embodiment, the input unit 2 is an input / output device, the processing units 52 to 54 of the calculation unit 3, the comparison unit 4, the display unit 5, and the construction amount storage unit 6 include Although an example in which the display unit 51 of the display unit 5 is a display has been described as a computer (control device), the present invention is not limited to this. For example, the grounding construction design support system may be a system that can input various information to the input means 2 remotely from the outside and receive the results remotely. In order to realize this system, a design worker or the like There may be provided a mobile terminal as a user terminal operated by the operator and a communication unit capable of communicating with the mobile terminal via a communication line. The user terminal is not limited to a portable terminal such as a mobile phone, a PDA, or a laptop computer, but may be a desktop computer that is installed on a desk or the like.

  DESCRIPTION OF SYMBOLS 1 ... Grounding construction design support system, 2 ... Input means, 21 ... Geological information input part, 211 ... Peripheral pole grounding method input part, 212 ... Peripheral pole resistance value input part, 213 ... Peripheral pole electrode length input part, 22 ... Grounding method information input unit, 221 ... pole interval input unit, 23 ... existing pole resistance value input unit, 24 ... comparison condition input unit, 241 ... resistance value comparison condition input unit, 241a ... facility information input unit, 241b ... grounding type input , 241c ... prescribed value input part, 242 ... construction place condition input part, 242a ... area input part, 242b ... texture input part, 242c ... geological input part, 243 ... constraint condition input part, 243a ... DESCRIPTION OF SYMBOLS 3 ... Calculation means, 31 ... Condition setting part, 331 ... Memory for calculation conditions, 332 ... Ground electrode diameter conversion table, 333 ... Memory for calculation results, 32 ... Ground resistance calculation part, 33 ... Memory | storage part, 4 ... Comparison means 41... Comparison unit 411. Resistance comparison unit 412 Construction site comparison unit 413 Restriction condition comparison unit 42 Storage unit 421 Comparison comparison memory 422 Regional suitability determination table 423 ... geological suitability judgment table, 424 ... geological suitability judgment table, 425 ... comparison result memory, 5 ... display means, 51 ... display section, 52 ... resistance display processing section, 53 ... construction amount display section, 54 ... not selectable Display processing unit, 6 ... construction amount storage unit, 100 ... ground electrode (existing electrode), 101 ... ground electrode (new electrode)

Claims (6)

In order to compare and compare the ground resistance values obtained by multiple grounding methods with the specified values that these grounding resistance values must satisfy, information on the specified values of grounding resistance, information on each grounding method, and construction of grounding methods Input means capable of inputting information on the ground resistance of the place to be
Based on the information input to the input means, calculating means for calculating a predicted value of the grounding resistance for each grounding method,
Comparing means for comparing the predicted value of the grounding resistance for each grounding method calculated by the calculating means with a specified value derived from information on the specified value of the grounding resistance input by the input means;
In addition to displaying the predicted value of the ground resistance for each grounding method calculated by the calculation means, and when the predicted value of each ground resistance is compared by the comparison means and is determined to be inappropriate, it is determined to be inappropriate A grounding construction design support system, comprising: a display unit configured to display a state in which it is possible to recognize that information regarding the predicted value of the determined grounding resistance cannot be selected.   The grounding work design support according to claim 1, wherein the display means displays in a recognizable manner that the grounding method cannot be selected in a portion where the predicted value of the grounding resistance determined to be inappropriate by the comparing means is displayed. system. The calculation means can calculate the predicted value of the ground resistance for each number of poles of the ground electrode that can be paralleled in each of the plurality of grounding methods.
The grounding work design support system according to claim 1 or 2, wherein the comparison means and the display means are capable of comparing and displaying for each number of poles of ground electrodes that can be paralleled in each of a plurality of grounding methods. The input means can input information about the place where the grounding method is constructed,
The comparison means can compare each grounding method with a selectable grounding method derived from information on the place where the grounding method is constructed,
The display means can recognize that the information regarding the predicted value of the grounding resistance determined to be inappropriate cannot be selected when each grounding method is determined to be inappropriate as a result of comparison by the comparison means. The grounding construction design support system according to claim 1, wherein the grounding design support system is in a display state. The input means can input information on the restrictions on the place where the grounding method is constructed,
The calculation means can calculate the predicted value of the ground resistance for each number of poles of the ground electrode that can be paralleled in each of the plurality of grounding methods.
The comparison means is capable of comparing the number of poles of the grounding electrodes that can be paralleled with each grounding method and the number of poles of the selectable grounding electrode that is derived from information on the restrictions on the place where the grounding method is applied,
When the display means determines that the number of poles of each ground electrode is inappropriate as a result of comparison by the comparison means, the display means cannot select information regarding the predicted value of the ground resistance determined to be inappropriate. The grounding construction design support system according to any one of claims 1 to 4, wherein the display state is recognizable.   The grounding work design support system according to any one of claims 1 to 5, wherein the display means displays the construction cost for the grounding method corresponding to the predicted value of the grounding resistance in association with the predicted value of the grounding resistance.

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