Research On The Lightning Risk Of Loss Of Human Life And Permanent Injury On The Oil Depot In Guangzhou

In the economy-developed and populous Guangzhou, the losses of casualties andeconomics caused by lightning are very heavy every year. At present the work oflightning risk assessment has comprehensive development and also has very goodresults.After that Benjamin Franklin invented the lightning rod about more than200yearsago，the gradual improvement of the lightning rod is widely used. In recent years,International Electro-technical Commission (IEC) do a lot of research on lightning riskassessment and released the technical report IEC61662on lightning risk assessmentand the standards IEC62305-2on risk management.The paper introduces the damage causes of lightning current and types, as well asdifferent types of damages caused by the division of the type of loss in IEC62305-2. Inthe paper, the composition of the risk and the method of lightning risk assessment isanalyzed in detail. Three key parameters are also defined: number of dangerous events,probability of damage and loss. The paper also analyses and researches soil resistivity，intercept area，flash density and PB in detail. These parameters must choose andcalculate According to the specific conditions of the evaluation object that can makesure the assessment results are accurate and targeted.Lightning risk assessment is a very complex, comprehensive project based oncomplicated data. Taking advantages of fast speed and high accuracy of computer, wedesign the software of lightning risk assessment using the C++language. In thesoftware, a large number of quantitative factors and complex formula using a computerprogram to make the process more effective and efficient, as well as to make theconclusion more clearly and accurately. According to the actual situation we can selectthe appropriate parameters from the software interface or enter the actual parameters.Finally, the software will calculate the value of each risk automatically. In addition tototal value of the risk, each definite value and its proportion of the total value will belisted separately. The estimation result was compared to the risk allowable value RTtodetermine the need for additional lightning protection measures.The paper also introduces relevant characteristics of the oil depot in detail. According to thecharacteristics of analysis results，the software of lightning risk assessment can calculatethe risk of loss of human life and permanent injury on the office area and tank depot.Lightning risk assessment is an important content of lightning protection anddisaster reduction work, and also an integral role in design and construction process.Lightning strike risk of the protected object can be quantified by lightning riskestimation, which is the basis of identifying risk, controlling risk and dealing withlightning strike risk. Economic and feasible measures taken accordingly based on theresults of risk assessment will avoid or minimize the loss of lives and property causedby lightning strikes.