CN108280872B - UWB positioning base station deployment scheme and evaluation method based on three-dimensional model of transformer substation - Google Patents
UWB positioning base station deployment scheme and evaluation method based on three-dimensional model of transformer substation Download PDFInfo
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Abstract
The invention relates to a deployment scheme and an evaluation method of a UWB positioning base station based on a three-dimensional model of a transformer substation. The method comprises the steps of taking a precisely modeled total-station three-dimensional simulation model as a background, truly simulating an actual deployment result, and ensuring that an evaluation conclusion is consistent with an actual application effect; the position of the base station can be adjusted at will in the model, and the number of UWB positioning base stations is increased and decreased, so that the deployment scheme is changed conveniently to achieve the optimal effect; the method collects the connection relation between the UWB positioning base station and the target object in real time, and accurately displays the quantity of the UWB positioning base stations in the line of sight with the target object, thereby providing reliable basis for signal quality evaluation.
Description
Technical Field
The invention belongs to the technical field of positioning base stations, and particularly relates to a UWB positioning base station deployment scheme and an evaluation method based on a three-dimensional model of a transformer substation.
Background
The accurate positioning of a person in a transformer substation generally adopts a UWB wireless positioning technology, and a plurality of base stations are required to be deployed in the transformer substation by applying the technology so as to ensure that the positioning accuracy reaches centimeter level. However, when there is a block between the base station and the target, the signal will be reflected or refracted, resulting in a reduced signal quality or no signal, and thus a large positioning error will be generated. Because the number of devices in the transformer substation is large and the heights are different, when base station deployment is carried out, a deployment strategy must be planned in advance to ensure that the most base stations can receive signals with the best quality when a target moves in the transformer substation and continuously transmits pulse signals, so that the positioning accuracy can meet the design requirement. In the existing method, a base station site selection scheme is roughly planned through a CAD drawing, so that three-dimensional site selection can not be realized, and an effect evaluation function after system deployment can not be realized.
Disclosure of Invention
The invention aims to solve the problem of evaluation of a deployment scheme of a substation positioning system base station, and provides a deployment scheme and an evaluation method of a UWB positioning base station based on a three-dimensional model of a substation.
In order to achieve the purpose, the UWB positioning base station deployment scheme and the evaluation method based on the three-dimensional model of the transformer substation, which are designed by the invention, comprise a transformer substation three-dimensional model scene constructed based on a three-dimensional laser scanning technology; the method is characterized in that:
the deployment scenario is as follows:
1a) according to the transformer substation drawing, setting a UWB positioning base station deployment principle, wherein the UWB positioning base station deployment principle is as follows: the UWB positioning base station is arranged at a position which is beyond the safety distance of the electrified equipment and is provided with a fixed support, the deployed height range of the UWB positioning base station is set to be 1-100 meters, the distance is set to be 0.1-50 meters, and the design of an initial deployment scheme is completed;
1b) according to an initial deployment scheme, m UWB positioning base stations and a point-shaped target object are arranged in a transformer substation three-dimensional model scene, all power equipment models in the transformer substation three-dimensional model scene are set as collision bodies, all UWB positioning base stations emit rays to be connected with the point-shaped target object, the color of the rays is displayed to be green when the rays emitted by the UWB positioning base stations do not collide with any collision bodies but are directly connected with the point-shaped target object, and otherwise, the color of the rays is red; the value of m is the maximum value of all positions suitable for deploying the positioning base station and is a natural number;
1c) starting from the height of Z meters from the ground in a three-dimensional model scene of the transformer substation, scanning line by line every step of X meters, wherein the distance between every line is Y, and recording the ray colors of all UWB positioning base stations and the point target object once every step until the whole plane is scanned completely;
1d) adding a stepping value to Z, and repeating the step 1c) until the three-dimensional scanning of the whole transformer substation three-dimensional model scene is completed;
1e) after the three-dimensional scanning of the three-dimensional model scene of the whole transformer substation is finished, counting the front n UWB positioning base stations with the largest green quantity of ray colors, wherein n is smaller than m, and taking the n positioning base stations as an optimal deployment scheme; scanning a three-dimensional model scene of the whole transformer substation, counting scanning points connected with five or more UWB positioning base stations, and filling green in a plane area with X, Y as the length and width by taking the scanning points as the center, and filling other scanning points with red; wherein n is a natural number;
the evaluation method of the deployment scheme comprises the following steps:
2a) according to the steps of the deployment schemes 1b) to 1d), completely scanning a three-dimensional model scene of the transformer substation, screening out the first n UWB positioning base stations with the most green rays, wherein the value of n accounts for 30% -50% of the total number of the UWB positioning base stations in the initial deployment scheme, and the number of scanning points which cannot be connected with at least five UWB positioning base stations, and calculating the ratio A1 of the total area S1 of the scanning points to the total area S of the transformer substation; if the value of A1 is smaller than the set threshold value B, the deployment scheme is reasonable;
2b) the method comprises the steps of reserving the first n UWB positioning base stations with the largest green rays, deleting other UWB positioning base stations, carrying out one-time complete scanning on the three-dimensional model scene of the transformer substation again, counting the number of scanning points which cannot be connected with at least five UWB positioning base stations again, calculating the ratio A2 of the total area S2 of the scanning points to the total area S of the transformer substation, and if the value of A2 is still smaller than B, showing that the deployment scheme is more reasonable than that in the step 2 a).
Further, in the step 2B), if the value of a2 is greater than B, the number of UWB positioning base stations needs to be increased, and the step 2B) is repeated until the value of a2 is less than B, which is an optimal deployment scheme.
In a transformer substation three-dimensional model scene accurately reconstructed, through continuous step-by-step scanning of a target object in the transformer substation three-dimensional model scene, counting UWB positioning base stations which are connected with a single target object at the same time in a most-view-distance mode (without barriers), wherein the more the UWB positioning base stations are, the better the deployment scheme is, and through repeated tests, the optimal deployment scheme is found out. Compared with the prior art, the invention has the following advantages:
1. the method comprises the steps of taking a precisely modeled total-station three-dimensional simulation model as a background, truly simulating an actual deployment result, and ensuring that an evaluation conclusion is consistent with an actual application effect;
2. in the evaluation process, the position of the base station can be adjusted at will in the model, and the number of UWB positioning base stations is increased and decreased, so that the deployment scheme is changed conveniently to achieve the optimal effect;
3. the power equipment is set to be a collision body, the UWB positioning base station is connected with the target object through the simulated ray, when the target object moves in the safe region of the transformer substation, the connection relation between the UWB positioning base station and the target object is collected in real time, the number of the UWB positioning base stations in the sight distance with the target object is accurately displayed, and a reliable basis is provided for signal quality evaluation.
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Fig. 1 is a schematic flow chart of a deployment scheme and an evaluation method of a UWB positioning base station based on a three-dimensional model of a transformer substation.
Detailed Description
The invention is described in further detail below with reference to the figures and the specific embodiments.
The deployment scheme and the evaluation method of the UWB positioning base station based on the three-dimensional model of the transformer substation comprise a transformer substation three-dimensional model scene constructed based on a three-dimensional laser scanning technology;
the deployment scenario is as follows:
1a) according to the CAD drawing of the transformer substation, setting a deployment principle of the UWB positioning base station, wherein the deployment principle of the UWB positioning base station is as follows: the UWB positioning base station is arranged at a position with a fixed support outside the safe distance of the electrified equipment, the height range of deployment of the UWB positioning base station is set to be 1-100 meters, the distance is set to be 0.1-50 meters, appropriate deployment points are selected as many as possible, and the design of an initial deployment scheme is completed;
1b) according to an initial deployment scheme, m UWB positioning base stations and a point-shaped target object are arranged in a transformer substation three-dimensional model scene, all power equipment models in the transformer substation three-dimensional model scene are set as collision bodies, all UWB positioning base stations emit rays to be connected with the point-shaped target object, the color of the rays is displayed to be green when the rays emitted by the UWB positioning base stations do not collide with any collision bodies but are directly connected with the point-shaped target object, and otherwise, the color of the rays is red; the value of m is the maximum value of all positions suitable for deploying the positioning base station and is a natural number;
1c) starting from the height of Z meters from the ground in a three-dimensional model scene of the transformer substation, scanning line by line every step of X meters, wherein the distance between every two lines is Y (the value of X, Y, Z can be set randomly, and the value range is 0.1-100 meters), and recording the ray colors of all UWB positioning base stations and the point target object once every step until the whole plane is scanned;
1d) adding a stepping value to Z, and repeating the step 1c) until the three-dimensional scanning of the whole transformer substation three-dimensional model scene is completed;
1e) after the three-dimensional scanning of the three-dimensional model scene of the whole transformer substation is finished, counting the front n UWB positioning base stations with the largest green quantity of ray colors, wherein n is smaller than m, and taking the n positioning base stations as an optimal deployment scheme; scanning a three-dimensional model scene of the whole transformer substation, counting scanning points connected with five or more UWB positioning base stations, and filling green in a plane area with X, Y as the length and width by taking the scanning points as the center, and filling other scanning points with red; wherein n is a natural number.
After the steps are completed, all the scanning points which cannot be connected with at least five UWB positioning base stations are filled with red, and other scanning points are filled with green, so that the intensity distribution diagram of the object sight distance signal is obtained.
The deployment scheme evaluation method comprises the following steps:
2a) according to the steps of the deployment schemes 1b) to 1d), completely scanning a three-dimensional model scene of the transformer substation, screening n UWB positioning base stations (namely the UWB positioning base stations with the most green rays) which are most connected with the sight distance of a target object, wherein the value of n accounts for 30% -50% of the total number of the UWB positioning base stations in the initial deployment scheme, and the number of scanning points which cannot be connected with at least five UWB positioning base stations, and calculating the ratio A1 of the total area S1 (the area of one point is 1 square meter) of the scanning points to the total area S of the transformer substation, wherein the larger A1 is, the worse effect is shown; if the value of A1 is smaller than the set threshold value B, the deployment scheme is basically reasonable, the precision of the UWB positioning system can reach the design requirement, and B can be modified according to the design requirement;
2b) reserving n UWB positioning base stations which are most connected with the sight distance of a target object, deleting other UWB positioning base stations, carrying out one-time complete scanning on the three-dimensional model scene of the transformer substation again, counting the number of scanning points which are not connected with at least five UWB positioning base stations again, calculating the ratio A2 of the total area S2 of the scanning points to the total area S of the transformer substation, and if the value of A2 is still smaller than B, the deployment scheme is more reasonable, and the precision requirement of the UWB positioning system is realized by using fewer UWB positioning base stations;
2c) if the value of a2 is greater than B, the number of UWB positioning base stations needs to be increased, step 2B) is repeated with the statistical table ranking as a basis until the value of a2 is less than B, at which point the solution is optimal.
Claims (2)
1. A deployment scheme and an evaluation method of a UWB positioning base station based on a three-dimensional model of a transformer substation comprise a transformer substation three-dimensional model scene constructed based on a three-dimensional laser scanning technology; the method is characterized in that:
the deployment scenario is as follows:
1a) according to the transformer substation drawing, setting a UWB positioning base station deployment principle, wherein the UWB positioning base station deployment principle is as follows: the UWB positioning base station is arranged at a position which is beyond the safety distance of the electrified equipment and is provided with a fixed support, the deployed height range of the UWB positioning base station is set to be 1-100 meters, the distance is set to be 0.1-50 meters, and the design of an initial deployment scheme is completed;
1b) according to an initial deployment scheme, m UWB positioning base stations and a point-shaped target object are arranged in a transformer substation three-dimensional model scene, all power equipment models in the transformer substation three-dimensional model scene are set as collision bodies, all UWB positioning base stations emit rays to be connected with the point-shaped target object, the color of the rays is displayed to be green when the rays emitted by the UWB positioning base stations do not collide with any collision bodies but are directly connected with the point-shaped target object, and otherwise, the color of the rays is red; the value of m is the maximum value of all positions suitable for deploying the positioning base station and is a natural number;
1c) starting from the height of Z meters from the ground in a three-dimensional model scene of the transformer substation, scanning line by line every step of X meters, wherein the distance between every two lines is Y meters, and recording the ray colors of all UWB positioning base stations and the point target once every step until the whole plane is scanned completely;
1d) adding a stepping value to Z, and repeating the step 1c) until the three-dimensional scanning of the whole transformer substation three-dimensional model scene is completed;
1e) after the three-dimensional scanning of the three-dimensional model scene of the whole transformer substation is finished, counting the front n UWB positioning base stations with the largest green quantity of ray colors, wherein n is smaller than m, and taking the n positioning base stations as an optimal deployment scheme; scanning a three-dimensional model scene of the whole transformer substation, counting scanning points connected with five or more UWB positioning base stations, and filling green in a plane area with X, Y as the length and width by taking the scanning points as the center, and filling other scanning points with red; wherein n is a natural number;
the evaluation method of the deployment scheme comprises the following steps:
2a) according to the steps of the deployment schemes 1b) to 1d), completely scanning a three-dimensional model scene of the transformer substation, screening out the first n UWB positioning base stations with the most green rays, wherein the value of n accounts for 30% -50% of the total number of the UWB positioning base stations in the initial deployment scheme, and the number of scanning points which cannot be connected with at least five UWB positioning base stations, and calculating the ratio A1 of the total area S1 of the scanning points to the total area S of the transformer substation; if the value of A1 is smaller than the set threshold B, the deployment scheme is reasonable;
2b) the method comprises the steps of reserving the first n UWB positioning base stations with the largest green rays, deleting other UWB positioning base stations, carrying out one-time complete scanning on the three-dimensional model scene of the transformer substation again, counting the number of scanning points which cannot be connected with at least five UWB positioning base stations again, calculating the ratio A2 of the total area S2 of the scanning points to the total area S of the transformer substation, and if the value of A2 is still smaller than B, showing that the deployment scheme is more reasonable than that in the step 2 a).
2. The substation three-dimensional model-based UWB positioning base station deployment scheme and evaluation method of claim 1, characterized in that: in the method for evaluating the deployment scheme, if the value of A2 is greater than B, the number of UWB positioning base stations needs to be increased, the UWB positioning base stations are gradually increased according to the sequencing of the statistical table, and the step 2B) is repeated until the value of A2 is less than B, so that the optimal deployment scheme is obtained.
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| CN109147272A (en) * | 2018-09-03 | 2019-01-04 | 国网天津市电力公司 | Line reminding method is got in violation of rules and regulations by substation based on ultra wide band UWB positioning |
| CN110719567A (en) * | 2019-10-23 | 2020-01-21 | 珠海优特电力科技股份有限公司 | Method and device for determining base station deployment mode |
| CN111598445A (en) * | 2020-05-15 | 2020-08-28 | 北京恒华伟业科技股份有限公司 | Safety measure arrangement scheme design method and device |
| CN112799009A (en) * | 2021-04-13 | 2021-05-14 | 国能信控互联技术有限公司 | Personnel positioning system and positioning method based on UWB |
| CN113473485B (en) * | 2021-07-07 | 2024-05-17 | 国网福建省电力有限公司经济技术研究院 | Substation engineering positioning base station optimal arrangement method and system |
| CN114071354B (en) * | 2021-11-05 | 2024-01-30 | 国能神东煤炭集团有限责任公司 | Multi-mode UWB positioning method and system based on topological map |
| CN116669054B (en) * | 2023-07-31 | 2023-12-12 | 国网湖北省电力有限公司 | 5G base station optimization planning method and storage medium |
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Effective date of registration: 20221019 Address after: 661100 southwest corner of the intersection of South extension section of Yinhe road and Honghe Avenue, Mengzi City, Honghe Hani and Yi Autonomous Prefecture, Yunnan Province Patentee after: HONGHE POWER SUPPLY BUREAU, YUNNAN POWER GRID Co.,Ltd. Address before: 661100 southwest corner of the intersection of South extension section of Yinhe road and Honghe Avenue, Mengzi City, Honghe Hani and Yi Autonomous Prefecture, Yunnan Province Patentee before: HONGHE POWER SUPPLY BUREAU, YUNNAN POWER GRID Co.,Ltd. Patentee before: WUHAN XINDIAN ELECTRICAL CO.,LTD. |