Safety assessment method of lightning rod tower in substation
A lightning rod tower and lightning rod technology are applied in the field of safety assessment of lightning rod towers in substations to achieve the effects of eliminating potential safety hazards, avoiding early failure and saving money.
Active Publication Date: 2016-06-08
STATE GRID CORP OF CHINA +1
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Problems solved by technology
So far, no corresponding supervision and inspection regulations have been developed for lightning rod towers, and there are institutional and technical gaps in the supervision of lightning rod towers
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Embodiment Construction
[0030] The embodiments of the present invention will be described in further detail below. It should be emphasized that the following embodiments are illustrative, not restrictive, and should not be used as limitations of the present invention.
[0031] In view of the fact that the main load of the lightning rod tower is the wind load, the force analysis of the lightning rod tower is carried out by using the finite element calculation method, and the force situation of the lightning rod tower under the wind load is simulated to determine the parts of the lightning rod tower that bear greater stress and the comparative For small parts, for the dismantled lightning rod towers that have been in service for several years, steel materials are intercepted at the parts that bear greater stress and the parts that bear less stress, and conduct tests such as metal phase comparison, strength comparison, toughness comparison, and fatigue performance comparison. Through the comparison of th...
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The invention relates to a method for evaluating the safety of a lightning rod tower in a substation, which includes the following steps: (1) divide the lightning rod tower into four parts on average according to the height direction, and calculate the equivalent concentrated force of wind load of each part; (2) obtain each part After the equivalent concentrated force of the lightning rod is established in the finite element numerical simulation software, the complete equivalent concentrated force model of the lightning rod is established; (3) determine the parts that bear the larger stress and the smaller parts in the structure of the lightning rod tower; (4) determine Whether the performance of the steel has deteriorated after several years of service; (5) Analyze the fatigue life of the lightning rod. According to the method of the present invention, not only can effectively prevent the continuous service of the lightning rod with major hidden dangers, and eliminate potential safety hazards, but more importantly, after the safety assessment of the lightning rods in service, the remaining life can be obtained, and the early failure of the tower can be avoided. If this technology is used in China Comprehensive promotion will save the country billions of funds every year.
Description
technical field [0001] The invention belongs to the technical field of safety evaluation of lightning rod towers in service substations of power systems, and in particular relates to a method for safety evaluation of lightning rod towers in substations. Background technique [0002] An effective way to prevent the lightning rod tower from toppling is to replace the long-serving lightning rod tower, but the replacement cost of a lightning rod tower is as high as one million yuan, and the number of long-term service lightning rod towers in China is as many as hundreds of thousands, and all of them must be replaced. The resulting cost is huge, and blind replacement will cause a waste of capital resources. Therefore, there is an urgent need to conduct a safety assessment of these lightning rod towers that have been in service for a long time to determine whether they can continue to serve. So far, no corresponding supervision and inspection regulations have been developed for l...
Claims
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IPC IPC(8): G06F17/50
Inventor 马崇程明陈韶瑜
Owner STATE GRID CORP OF CHINA