CAJ | 학술논문

闪电定位系统(LLS)是目前最主要的雷电监测手段,在雷电预警以及雷电防护等工作中起着重要的作用,但其性能指标大多基于理论分析,实际检验工作一直比较缺乏.为了对闪电定位结果的精确性进行检验,利用2007/2008年广州从化人工触发闪电的近距离光电观测数据,分析了广东电网闪电定位系统对人工触发闪电事件及其回击过程的探测效率和探测精度.结果表明:对于14次包含有回击过程的人工触发闪电事件,闪电定位系统共探测到13次探测效率约为93%(即13/14);对于能够利用观测资料确认的62次回击过程,闪电定位系统共探测到26次,探测效率约为42%(即26/62);参与定位的站数≥3个的回击记录有24次,其中有21次回击过程属于接地点已知的地面触发闪电事件,闪电定位系统对这些回击过程接地点位置的平均定位误差约为760 m;对于其中9次有雷电流直接测量结果的回击过程,闪电定位系统雷电流峰值反演结果的相对误差约为14%.
섬전정위계통(LLS)시목전최주요적뇌전감측수단,재뇌전예경이급뇌전방호등공작중기착중요적작용,단기성능지표대다기우이론분석,실제검험공작일직비교결핍.위료대섬전정위결과적정학성진행검험,이용2007/2008년엄주종화인공촉발섬전적근거리광전관측수거,분석료엄동전망섬전정위계통대인공촉발섬전사건급기회격과정적탐측효솔화탐측정도.결과표명:대우14차포함유회격과정적인공촉발섬전사건,섬전정위계통공탐측도13차탐측효솔약위93%(즉13/14);대우능구이용관측자료학인적62차회격과정,섬전정위계통공탐측도26차,탐측효솔약위42%(즉26/62);삼여정위적참수≥3개적회격기록유24차,기중유21차회격과정속우접지점이지적지면촉발섬전사건,섬전정위계통대저사회격과정접지점위치적평균정위오차약위760 m;대우기중9차유뇌전류직접측량결과적회격과정,섬전정위계통뇌전류봉치반연결과적상대오차약위14%.
Lightning location system(LLS)plays a key role in lightning forecast and protection.Performance index of LLS is not based on the practical test but the theoretical analysis.For the validation of the truth of lightning location results,detection efficiency and detection precision for artificial-triggered flashes and return strokes are comprehensively analyzed based on the close Optical Electrical observation of Rocket triggered lightning and the LLS records of Guangdong power network.The results show that the flash detection efficiency and stroke detection efficieney are 93%(13/14)and 42%(26/6))for rocket-triggered lightning,there are 24 LLS records achieved by more than 3 detection stations,21 of which are ground-triggered strokes and the normalized space location error is 760 meters(sample size:21).The relative errors of lightning current amplitude are normalized to be 14%(sample size:9).