WO2015169162A1 - Power transmission line wildfire fine positioning method based on brightness temperature value analysis - Google Patents

Power transmission line wildfire fine positioning method based on brightness temperature value analysis Download PDF

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WO2015169162A1
WO2015169162A1 PCT/CN2015/077652 CN2015077652W WO2015169162A1 WO 2015169162 A1 WO2015169162 A1 WO 2015169162A1 CN 2015077652 W CN2015077652 W CN 2015077652W WO 2015169162 A1 WO2015169162 A1 WO 2015169162A1
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grid
fire
fire point
sub
grids
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PCT/CN2015/077652
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French (fr)
Chinese (zh)
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陆佳政
郭俊
张红先
方针
李波
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国家电网公司
国网湖南省电力公司
国网湖南省电力公司电力科学研究院
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Publication of WO2015169162A1 publication Critical patent/WO2015169162A1/en

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    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • G08B17/12—Actuation by presence of radiation or particles, e.g. of infrared radiation or of ions

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  • the invention belongs to the technical field of electrical engineering, and particularly relates to a method for fine-tuning positioning of a transmission line based on brightness temperature value analysis.
  • transmission line mountain fire monitoring In order to meet the needs of transmission line mountain fire wide-area monitoring, transmission line mountain fire monitoring relies on satellite remote sensing monitoring technology. However, most of the polar orbiting satellites or synchronous geostationary satellites have lower infrared channel resolution, and current satellite data based mountains The positioning accuracy of the fire positioning method is often restricted by the resolution of the satellite data, and the fire point positioning error is large. After the on-site transmission line operation and maintenance personnel receive the fire point warning information, it still takes a lot of time and effort to find the mountain fire point. It has greatly affected the effect and efficiency of mountain fire disposal on transmission lines, and has been unable to meet the requirements of power grid fire prevention. To this end, it is necessary to develop a fine positioning method for mountain fires to improve the positioning accuracy of mountain fires, provide more accurate information for grid fire prevention, improve the efficiency of mountain fire disposal, and avoid causing power grid safety accidents.
  • the technical problem to be solved by the invention is that, in view of the defects of low accuracy of mountain fire positioning based on satellite data, a method for fine positioning of transmission line mountain fire based on bright temperature value analysis is provided.
  • the method can effectively improve the positioning accuracy of the mountain fire point and make up for the lack of resolution of the satellite monitoring data, and requires clear principles, convenient operation and strong practicability.
  • the technical proposal of the present invention is to provide a method for fine-tuning positioning of a transmission line based on brightness temperature value analysis, which is based on satellite infrared data, based on a bright temperature dynamic threshold fire point identification method, through a mountain fire point sub-gate
  • the division of the grid comprehensively consider the information of the fire point grid brightness temperature value to improve the positioning accuracy of the mountain fire.
  • the party The implementation of the law includes the following specific steps:
  • infrared data acquisition Online search for a polar-orbiting satellite online receiving system or a synchronous geostationary satellite online receiving system, using the system to obtain infrared channel data of a commissioned transmission line mountain fire;
  • the dynamic threshold value of the fire point identification is calculated by using the conventional background brightness temperature dynamic threshold method, and the obtained threshold value is used to identify the grid of the fire point of the commissioned transmission line mountain fire in the data obtained in the step (1). grid;
  • step (3) sub-grid division.
  • the grid equal amount identified in step (2) is divided into four sub-grids as shown in FIG. 1;
  • FIG. 1 is a schematic diagram of a sub-grid division state of the step (4) of the method for fine-tuning the transmission line of the power transmission line of the present invention
  • step (4.1) is a schematic diagram showing the state of the fire point grid around the current fire point grid in step (4.1);
  • Figure 3 is a schematic view showing the state of the fire point grid around the current fire point grid in the step (4.2);
  • Figure 4 is a schematic diagram of the state of the non-fire point grid around the current fire point grid in step (4.3).
  • infrared data acquisition Online search for a polar-orbiting satellite online receiving system, using the system to obtain infrared channel data of the commissioned transmission line mountain fire;
  • the dynamic threshold value of the fire point identification is calculated by using the conventional background brightness temperature dynamic threshold method, and the obtained threshold value is used to identify the grid of the fire point of the commissioned transmission line mountain fire in the data obtained in the step (1). grid;
  • step (3) sub-grid division.
  • the grid equal amount identified in step (2) is divided into four sub-grids as shown in FIG. 1;
  • step (2) Determines the sub-grid where the fire point is located.
  • the fire point of the transmission line is at the position of the four sub-grids in the step (3) where it is located:
  • infrared data acquisition Online search for a synchronous geostationary satellite online receiving system, using the system to obtain infrared channel data of the commissioned transmission line mountain fire;
  • Steps (2) to (4) are the same as in the first embodiment

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fire-Detection Mechanisms (AREA)
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Abstract

A power transmission line wildfire fine positioning method based on brightness temperature value analysis, comprising the following steps: (1) infrared data is obtained; (2) wildfire fire points are identified; (3) sub-grids are divided; (4) a sub-grid in which a fire point is located is determined: (4.1) if fire points are present in grids surrounding a grid, it is indicated that the fire point is present in the grid; (4.2) if there is a grid in which a fire point is not present, it is indicated that the fire point is near to a sub-grid of a grid in which a fire point is present; (4.3) if fire points are not present in the surrounding grids, and a brightness temperature value is the same, it is indicated that the fire point is located in the centre of the grid. The present method: 1) has a clear principle, convenient operation and high practical value; 2) effectively improves fire point positioning accuracy, and makes up for the deficiencies of low satellite monitoring data resolution; 3) effectively improves wildfire warning accuracy for a power grid, and ensures safe operation of the power grid.

Description

一种基于亮温值分析的输电线路山火精细化定位方法A Refined Location Method for Transmission Lines Based on Bright Temperature Value Analysis 技术领域Technical field
本发明属于电气工程技术领域，具体涉及一种基于亮温值分析的输电线路山火精细化定位方法。The invention belongs to the technical field of electrical engineering, and particularly relates to a method for fine-tuning positioning of a transmission line based on brightness temperature value analysis.
背景技术Background technique
为满足输电线路山火广域监测的需求，输电线路山火监测需依赖卫星遥感监测技术，然而目前绝大部分极轨卫星或者同步静止卫星的红外通道分辨率较低，当前基于卫星数据的山火定位方法的定位精度往往受卫星数据分辨率的制约，火点定位误差较大，现场输电线路运行维护人员收到火点告警信息后，仍需耗费大量的时间、精力才能找到山火点，极大地影响了输电线路山火处置的效果和效率，已经无法适应电网山火防治的要求。为此，必须研发一种山火火点精细化定位方法来提高山火火点定位精度，为电网山火防治提供更为精确的信息，提高山火处置效率，避免引发电网安全事故。In order to meet the needs of transmission line mountain fire wide-area monitoring, transmission line mountain fire monitoring relies on satellite remote sensing monitoring technology. However, most of the polar orbiting satellites or synchronous geostationary satellites have lower infrared channel resolution, and current satellite data based mountains The positioning accuracy of the fire positioning method is often restricted by the resolution of the satellite data, and the fire point positioning error is large. After the on-site transmission line operation and maintenance personnel receive the fire point warning information, it still takes a lot of time and effort to find the mountain fire point. It has greatly affected the effect and efficiency of mountain fire disposal on transmission lines, and has been unable to meet the requirements of power grid fire prevention. To this end, it is necessary to develop a fine positioning method for mountain fires to improve the positioning accuracy of mountain fires, provide more accurate information for grid fire prevention, improve the efficiency of mountain fire disposal, and avoid causing power grid safety accidents.
发明内容Summary of the invention
本发明要解决的技术问题是：针对目前基于卫星数据的山火定位精度低的缺陷，提供一种基于亮温值分析的输电线路山火精细化定位方法。使用该方法可有效提高山火火点定位精度，弥补卫星监测数据分辨率低的不足，要求所据原理清晰，操作方便，实用性强。The technical problem to be solved by the invention is that, in view of the defects of low accuracy of mountain fire positioning based on satellite data, a method for fine positioning of transmission line mountain fire based on bright temperature value analysis is provided. The method can effectively improve the positioning accuracy of the mountain fire point and make up for the lack of resolution of the satellite monitoring data, and requires clear principles, convenient operation and strong practicability.
本发明的技术方案是，所提供的一种基于亮温值分析的输电线路山火精细化定位方法，系根据卫星红外数据，基于亮温动态阈值火点识别方法，通过山火火点亚栅格划分，综合考虑火点栅格亮温值信息来提高山火定位精度。该方 法执行时包括下述具体步骤：The technical proposal of the present invention is to provide a method for fine-tuning positioning of a transmission line based on brightness temperature value analysis, which is based on satellite infrared data, based on a bright temperature dynamic threshold fire point identification method, through a mountain fire point sub-gate The division of the grid, comprehensively consider the information of the fire point grid brightness temperature value to improve the positioning accuracy of the mountain fire. The party The implementation of the law includes the following specific steps:
(1)、红外数据获取。在线搜索出极轨卫星在线接收系统或同步静止卫星在线接收系统，使用该系统获取到委托输电线路山火的红外通道数据；(1), infrared data acquisition. Online search for a polar-orbiting satellite online receiving system or a synchronous geostationary satellite online receiving system, using the system to obtain infrared channel data of a commissioned transmission line mountain fire;
(2)、山火火点识别。依据步骤(1)所获数据，使用常规背景亮温动态阈值方法计算出火点辨识动态阈值，利用所得阈值在步骤(1)所获数据中辨识出委托输电线路山火的火点所处的栅格；(2), mountain fire point identification. According to the data obtained in the step (1), the dynamic threshold value of the fire point identification is calculated by using the conventional background brightness temperature dynamic threshold method, and the obtained threshold value is used to identify the grid of the fire point of the commissioned transmission line mountain fire in the data obtained in the step (1). grid;
(3)、亚栅格划分。参见附图1，将步骤(2)所辨识出的栅格等量划分为如图1所示的四个亚栅格；(3), sub-grid division. Referring to FIG. 1, the grid equal amount identified in step (2) is divided into four sub-grids as shown in FIG. 1;
(4)、判断火点所处亚栅格。参见附图1，判断步骤(2)所辨识出的委托输电线路山火的火点处于其所处步骤(3)所划四个亚栅格中的位置：(4) Determine the sub-grid where the fire point is located. Referring to Figure 1, it is judged that the fire point of the commissioned transmission line mountain fire identified in step (2) is in the position of the four sub-grids in the step (3) where it is located:
(4.1)、参见附图2，若委托输电线路山火的火点所处栅格周围的8个栅格，如图2所示，均存在火点，则表明委托输电线路山火的火点所处栅格为步骤(3)划分的四个亚栅格如图2所示均存在火点；(4.1), referring to Figure 2, if the 8 grids around the grid where the fire point of the mountain fire is entrusted, as shown in Figure 2, there is a fire point, which indicates the fire point of the commissioned transmission line. The four sub-grids divided by the grid in step (3) have fire points as shown in FIG. 2;
(4.2)、参见附图3，若委托输电线路山火的火点所处栅格周围的8个栅格中，如图3所示，至少有一个栅格不存在火点而其它栅格存在火点，则表明委托输电线路山火的火点位于步骤(3)划分的四个亚栅格中靠近周围存在火点栅格的亚栅格；(4.2), referring to Figure 3, if the 8 grids around the grid where the fire point of the transmission line is commissioned, as shown in Figure 3, at least one grid does not have a fire point and other grids exist. The fire point indicates that the fire point of the commissioned transmission line mountain fire is located in the sub-grid near the fire point grid in the four sub-grids divided by step (3);
(4.3)、参见附图4，若委托输电线路山火的火点所处栅格周围的8个栅格如图4所示均不存在火点，则比较委托输电线路山火的火点所处栅格周围栅格的亮温值，若周围栅格的亮温值相同或误差在5％以内，则表明委托输电线路山火的火点位于所处栅格的中心，或位于步骤(3)划分的四个亚栅格中靠近周围亮温值较高的亚栅格。 (4.3), referring to Figure 4, if there are no fire points in the eight grids around the grid where the fire point of the mountain fire is entrusted, the fire point of the mountain fire will be compared. The brightness temperature of the grid around the grid. If the brightness of the surrounding grid is the same or the error is within 5%, it indicates that the fire point of the commissioned transmission line is located at the center of the grid, or at step (3). Among the four sub-grids divided into sub-grids with high brightness values around.
本发明的有益效果是：The beneficial effects of the invention are:
1)、原理清晰，操作方便，具有很高的实用价值；1) The principle is clear, the operation is convenient, and it has high practical value;
2)、可有效提高山火火点定位精度，弥补卫星监测数据分辨率低的不足；2), can effectively improve the positioning accuracy of the mountain fire point, and make up for the lack of resolution of the satellite monitoring data;
3)、可有效提高电网山火告警的准确度，对应对电网山火灾害和保障电网安全可靠的运行具有重要作用。3), can effectively improve the accuracy of the grid fire alarm, corresponding to the grid fire disaster and ensure the safe and reliable operation of the grid.
附图说明DRAWINGS
图1为本发明输电线路山火精细化定位方法之步骤(4)的亚栅格划分状态示意图；1 is a schematic diagram of a sub-grid division state of the step (4) of the method for fine-tuning the transmission line of the power transmission line of the present invention;
图2为步骤(4.1)的当前火点栅格周围均为火点栅格状态示意图；2 is a schematic diagram showing the state of the fire point grid around the current fire point grid in step (4.1);
图3为步骤(4.2)的当前火点栅格周围存在火点栅格状态示意图；Figure 3 is a schematic view showing the state of the fire point grid around the current fire point grid in the step (4.2);
图4为步骤(4.3)的当前火点栅格周围均为非火点栅格状态示意图。Figure 4 is a schematic diagram of the state of the non-fire point grid around the current fire point grid in step (4.3).
具体实施方式detailed description
实施例1：Example 1:
(1)、红外数据获取。在线搜索出极轨卫星在线接收系统，使用该系统获取到委托输电线路山火的红外通道数据；(1), infrared data acquisition. Online search for a polar-orbiting satellite online receiving system, using the system to obtain infrared channel data of the commissioned transmission line mountain fire;
(2)、山火火点识别。依据步骤(1)所获数据，使用常规背景亮温动态阈值方法计算出火点辨识动态阈值，利用所得阈值在步骤(1)所获数据中辨识出委托输电线路山火的火点所处的栅格；(2), mountain fire point identification. According to the data obtained in the step (1), the dynamic threshold value of the fire point identification is calculated by using the conventional background brightness temperature dynamic threshold method, and the obtained threshold value is used to identify the grid of the fire point of the commissioned transmission line mountain fire in the data obtained in the step (1). grid;
(3)、亚栅格划分。参见附图1，将步骤(2)所辨识出的栅格等量划分为如图1所示的四个亚栅格；(3), sub-grid division. Referring to FIG. 1, the grid equal amount identified in step (2) is divided into four sub-grids as shown in FIG. 1;
(4)、判断火点所处亚栅格。参见附图1，判断步骤(2)所辨识出的委托 输电线路山火的火点处于其所处步骤(3)所划四个亚栅格中的位置：(4) Determine the sub-grid where the fire point is located. Referring to Figure 1, the decision identified in step (2) is determined. The fire point of the transmission line is at the position of the four sub-grids in the step (3) where it is located:
(4.1)、参见附图2，若委托输电线路山火的火点所处栅格周围的8个栅格，如图2所示，均存在火点，则表明委托输电线路山火的火点所处栅格为步骤(3)划分的四个亚栅格如图2所示均存在火点；(4.1), referring to Figure 2, if the 8 grids around the grid where the fire point of the mountain fire is entrusted, as shown in Figure 2, there is a fire point, which indicates the fire point of the commissioned transmission line. The four sub-grids divided by the grid in step (3) have fire points as shown in FIG. 2;
(4.2)、参见附图3，若委托输电线路山火的火点所处栅格周围的8个栅格中，如图3所示，至少有一个栅格不存在火点而其它栅格存在火点，则表明委托输电线路山火的火点位于步骤(3)划分的四个亚栅格中靠近周围存在火点栅格的亚栅格；(4.2), referring to Figure 3, if the 8 grids around the grid where the fire point of the transmission line is commissioned, as shown in Figure 3, at least one grid does not have a fire point and other grids exist. The fire point indicates that the fire point of the commissioned transmission line mountain fire is located in the sub-grid near the fire point grid in the four sub-grids divided by step (3);
(4.3)、参见附图4，若委托输电线路山火的火点所处栅格周围的8个栅格如图4所示均不存在火点，则比较委托输电线路山火的火点所处栅格周围栅格的亮温值，若周围栅格的亮温值相同或误差在5％以内，则表明委托输电线路山火的火点位于所处栅格的中心，或位于步骤(3)划分的四个亚栅格中靠近周围亮温值较高的亚栅格。(4.3), referring to Figure 4, if there are no fire points in the eight grids around the grid where the fire point of the mountain fire is entrusted, the fire point of the mountain fire will be compared. The brightness temperature of the grid around the grid. If the brightness of the surrounding grid is the same or the error is within 5%, it indicates that the fire point of the commissioned transmission line is located at the center of the grid, or at step (3). Among the four sub-grids divided into sub-grids with high brightness values around.
实施例2：Example 2:
(1)、红外数据获取。在线搜索出同步静止卫星在线接收系统，使用该系统获取到委托输电线路山火的红外通道数据；(1), infrared data acquisition. Online search for a synchronous geostationary satellite online receiving system, using the system to obtain infrared channel data of the commissioned transmission line mountain fire;
步骤(2)～(4)同实施例1； Steps (2) to (4) are the same as in the first embodiment;

Claims (1)

  1. 一种基于亮温值分析的输电线路山火精细化定位方法，该方法包括下述步骤：A method for fine-tuning positioning of a transmission line based on brightness temperature value analysis, the method comprising the following steps:
    (1)、红外数据获取。在线搜索出极轨卫星在线接收系统或同步静止卫星在线接收系统，使用该系统获取到委托输电线路山火的红外通道数据；(1), infrared data acquisition. Online search for a polar-orbiting satellite online receiving system or a synchronous geostationary satellite online receiving system, using the system to obtain infrared channel data of a commissioned transmission line mountain fire;
    (2)、山火火点识别。依据步骤(1)所获数据，使用常规背景亮温动态阈值方法计算出火点辨识动态阈值，利用所得阈值在步骤(1)所获数据中辨识出委托输电线路山火的火点所处的栅格；(2), mountain fire point identification. According to the data obtained in the step (1), the dynamic threshold value of the fire point identification is calculated by using the conventional background brightness temperature dynamic threshold method, and the obtained threshold value is used to identify the grid of the fire point of the commissioned transmission line mountain fire in the data obtained in the step (1). grid;
    (3)、亚栅格划分。参见附图1，将步骤(2)所辨识出的栅格等量划分为如图1所示的四个亚栅格；(3), sub-grid division. Referring to FIG. 1, the grid equal amount identified in step (2) is divided into four sub-grids as shown in FIG. 1;
    (4)、判断火点所处亚栅格。参见附图1，判断步骤(2)所辨识出的委托输电线路山火的火点处于其所处步骤(3)所划四个亚栅格中的位置：(4) Determine the sub-grid where the fire point is located. Referring to Figure 1, it is judged that the fire point of the commissioned transmission line mountain fire identified in step (2) is in the position of the four sub-grids in the step (3) where it is located:
    (4.1)、参见附图2，若委托输电线路山火的火点所处栅格周围的8个栅格，如图2所示，均存在火点，则表明委托输电线路山火的火点所处栅格为步骤(3)划分的四个亚栅格如图2所示均存在火点；(4.1), referring to Figure 2, if the 8 grids around the grid where the fire point of the mountain fire is entrusted, as shown in Figure 2, there is a fire point, which indicates the fire point of the commissioned transmission line. The four sub-grids divided by the grid in step (3) have fire points as shown in FIG. 2;
    (4.2)、参见附图3，若委托输电线路山火的火点所处栅格周围的8个栅格中，如图3所示，至少有一个栅格不存在火点而其它栅格存在火点，则表明委托输电线路山火的火点位于步骤(3)划分的四个亚栅格中靠近周围存在火点栅格的亚栅格；(4.2), referring to Figure 3, if the 8 grids around the grid where the fire point of the transmission line is commissioned, as shown in Figure 3, at least one grid does not have a fire point and other grids exist. The fire point indicates that the fire point of the commissioned transmission line mountain fire is located in the sub-grid near the fire point grid in the four sub-grids divided by step (3);
    (4.3)、参见附图4，若委托输电线路山火的火点所处栅格周围的8个栅格如图4所示均不存在火点，则比较委托输电线路山火的火点所处栅格周围栅格的亮温值，若周围栅格的亮温值相同或误差在5％以内，则表明委托输电 线路山火的火点位于所处栅格的中心，或位于步骤(3)划分的四个亚栅格中靠近周围亮温值较高的亚栅格。 (4.3), referring to Figure 4, if there are no fire points in the eight grids around the grid where the fire point of the mountain fire is entrusted, the fire point of the mountain fire will be compared. The brightness temperature of the grid around the grid. If the brightness of the surrounding grid is the same or the error is within 5%, it indicates that the power transmission is commissioned. The fire point of the line mountain fire is located at the center of the grid in which it is located, or in the four sub-grids divided by step (3), which are close to the sub-grid with higher brightness temperature values.
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