【摘要】：綜合考慮河南省范圍內(nèi)電網(wǎng)污閃故障的時(shí)空分布特征及地理地貌特征,利用河南省電網(wǎng)污閃故障數(shù)據(jù)及地面氣象觀測數(shù)據(jù),研究首先確定了與該地區(qū)電網(wǎng)污閃故障密切相關(guān)的積污持續(xù)時(shí)間、近地層逆溫、相對濕度、風(fēng)速風(fēng)向等環(huán)境氣象特征參數(shù),然后采用時(shí)空匹配、統(tǒng)計(jì)閾值分析和綜合氣象指標(biāo)調(diào)整優(yōu)化等手段,對各特征參數(shù)的綜合閾值進(jìn)行了初步評定,最終建立了河南省電網(wǎng)污閃故障的可定量化綜合氣象分析指標(biāo)及對應(yīng)氣象條件:高濕、弱風(fēng)、前期少雨、近地面大氣層結(jié)穩(wěn)定。該指標(biāo)較好地?cái)M合了氣象環(huán)境條件與污閃故障之間的關(guān)系,檢驗(yàn)結(jié)果顯示指標(biāo)無漏報(bào),且空報(bào)率低于10%;基于該指標(biāo)計(jì)算的多年平均條件下,河南地區(qū)污閃故障多發(fā)生在冬季,且河南東北部為電網(wǎng)污閃故障高發(fā)區(qū)。研究成果為河南地區(qū)的電網(wǎng)污閃故障防御提供了技術(shù)支持。
[Abstract]:Considering the temporal and spatial distribution characteristics and geographical and geomorphological characteristics of pollution flashover fault in Henan Province, using the pollution flashover fault data and surface meteorological observation data of Henan power grid, the environmental meteorological characteristic parameters, such as pollution duration, near formation inversion, relative humidity, wind speed and wind direction, which are closely related to pollution flashover fault in this area, are determined, and then the matching between time and space is adopted. By means of statistical threshold analysis and comprehensive meteorological index adjustment and optimization, the comprehensive threshold of each characteristic parameter is preliminarily evaluated. Finally, the quantitative comprehensive meteorological analysis index and corresponding meteorological conditions of pollution flashover fault in Henan power grid are established: high humidity, weak wind, less rain in the early stage and stable near the surface atmosphere. The index fits the relationship between meteorological environment conditions and pollution flashover fault well, and the test results show that the index has no missed report, and the empty report rate is less than 10%. Under the average conditions calculated by this index for many years, most of the pollution flashover faults in Henan area occur in winter, and the northeast of Henan Province is the area with high incidence of pollution flashover faults in power grid. The research results provide technical support for power grid pollution flashover fault prevention in Henan Province.
【作者單位】： 中國氣象局公共氣象服務(wù)中心;國家電網(wǎng)河南省電力公司電力科學(xué)研究院;
【基金】：國家電網(wǎng)公司重大基礎(chǔ)前瞻科技項(xiàng)目(SG20141187)資助
【分類號(hào)】：TM73;P49

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