Hdi nghi Khoa hgc h'''''''' niem 35 ndm Vien Khoa hgc vd Cdng nghe Viet Nam Hd Ndi JO 20JO VE MOT SO KET QUA NGHIEN ClTU DONG SET VA PHONG CHONG SET GAN DAY O VIEN VAT LY DIA CAu SOME RESULTS OF THE RECENT[.]
Hdi nghi Khoa hgc h'' niem 35 ndm Vien Khoa hgc vd Cdng nghe Viet Nam - Hd Ndi JO 20JO VE MOT SO KET QUA NGHIEN ClTU DONG SET VA PHONG CHONG SET GAN DAY O VIEN VAT LY DIA CAu SOME RESULTS OF THE RECENT THUNDERSTORM AND LIGHTNING PROTECTION RESEARCH IN VIETNAM Nguyen Xuan Anh, Le Viet Huy, Hoang Hai Son Vien Vit ly Dja eiu 18 - Hoing Qude Viet, Ciu Giiy, H i Ndi Email: nxiiananh05(ajgmail.com Tdm tat: Viet Nam ndm tdm ddng chdu A cd hogt ddng ddng sit mgnh dnh hudng true tiip lin kinh ti xd hdi Trong bdi bdo ndy, chung tdi tdng kit mdt sd kit qud linh vuc nghien ciru ddng sit vd phdng chdng sit dugc thue hien nhirng ndm gdn day a Viin Vdt ly Dia cdu Ndm 2003, Viin Vdt ly Dja cdu da cho triin khai mgng trgm dinh vj phdng diin sit ddu tiin a Viet Nam vai quy md gdm trgm cd bdn kinh hogt ddng bao phu todn bd lanh thd Kit qud xir ly sd lieu cho thdy hogt ddng ddng sit ngdy a nuac ta diin mgnh vdo budi chiiu tir 14-2Oh Trong ndm, hogt dgng ddng set xdy mgnh nhdt vdo cdc thdng 5,6,7 tiiy theo tirng khu vuc Sd lieu djnh vj phdng diin ciing cho phep nghiin ciru cdc thdng sd khdc ciia ddng nhu tdc phdng diin, viing bao phu, hudng di chuyin Trong huang nghiin cim phdng chdng sit chiing tdi tdng kit mot sd vdn di liin quan tai nghiin cim thue hiin phdng chdng set cho cdng trinh xdy dung vd chi rdng quy phgm cdn thay ddi mot sd diim di cap nhdt nhirng kiin thirc mai nhdt linh vuc ndy, cu thi la phirang phdp ddnh gid rid ro sit gdy nin thiit ki chdng sit Phdn cudi bdi bdo trinh bdy vi nhirng hirang nghiin cim vi linh vuc ndy md Viin Vdt ly Dja cdu se triin khai nhirng ndm tai Abstract: Vietnam is located inside Asian Thunderstorm Center and thus lightning directly impacts on social economic developments In this paper we reviewed recent results of thunderstorm and lightning protection research at the Institute of Geophysics The Vietnam Lightning Detection Network (VLDN) has been established in 2003 VLDN includes stations, each has detection radius of about 400km covering almost Vietnam territory Daily, lightning is the most active in period of 14-20h Thunderstorm activity has peak in May, June and July VLDN can detect other parameters such as lightning flash rate, thunderstorm cover and movement In this paper some features of new lightning protection standards for ordinary buildings were also discussed Considering these standards, we point out that some items must be changed in order to reflect achievements of modern lightning protection technology This procedure is also known as risk management in lightning protection design We briefly figure out some future works in this field at the Institute of Geophysics 295 Tiiu ban: Cdc Khoa hoc vi Trdi ddt ISBN: 978-604-913-016-8 MODAU Viet Nam nim d tim ddng chiu A, mdt ba tim ddng tren the gidi cd boat ddng ddng set manh Hoat ddng ddng set giy inh hudng tryc tiep den hoat ddng kinh te - xa hgi Set thudng xuyen li hiem hga giy thiet hai ve ngudi vi ciia Theo sd lieu thdng ke chua diy du ciia Vien Vat ly Dja ciu [1] thyc hien nim 2004, tren ci nude cd 820 vy set dinh 10 nim trd lai day, giy thiet hai tryc tiep nhieu ty ddng, lim giin doan djch vu vien thdng, dien lyc Nhilu vu set lim chit ngudi gay tim ly hoang mang nhin din Viec dilu tra nhirng thdng sd co bin cua mdi trudng nhu ddng set, dinh gii dy bio hoat ddng eiia ehiing d hing dja phuong ed tim quan trgng eho boat ddng sin xuit cua hing dja phuong dd Trong edng eugc edng nghiep hoi, hien dai hda dit nude, mudn xiy dyng eic khu cdng nghiep ldn thu biit vdn diu tu nude ngoii nhit thiet phii bit diu tir viec nghien cim eac thdng sl mdi trudng niy Trong ITnh vyc phdng chdng set hiu bet chiing ta sir dung cic thiet bj phdng chIng set nhip ngoai Nhilu loai miy mdc thiet bj phdng chdng set duge tung tren thj trudng Hieu qui cua nhieu phuong phip mdi cdn chua rd rang, thim chi nhieu ket qui edn dem lai hiu qui khdng mong mudn Bii bio tdng ket mdt sd ket qui da dat duge cie de tii nghien ciiu ve ddng set vi phdng chIng set nhiing nim vira qua d Vien Vit ly Dia cau vi trinh biy nhiing dy djnh nghien ciiu giai doan sip tdi MANG TRAM DINH VI PHONG DIEN SET VIET NAM • • • • • • 2.1 Gidi thieu ve mang tram va phuong phap xu Iy sd lieu Vio dau nim 2003, mang ludi miy djnh vj set gdm cic tram Thii Nguyen, Phii Thuy vi NghTa Dd (Hi Ngi), Mgc Chau (Son La), Phu Yen, Binh Thuin, Bac Lieu da dugc dua vio boat ddng Vdi ning djnh vj bin kinh den 400 km di bao phii toin bd lanh thd Mang tram djnh vj set tren pham vi ci nude dugc tri boat ddng 24/24 gid tu nim 2003 Nguyen ly boat dgng li sir dyng cic ing ten thu sdng dien tir tia set phit [1] Ty le giiia hai dinh cua xung dien vi thdi gian giiia cac dinh dugc su dung de phin biet phdng dien miy vdi phdng dien xudng mat dit Vj tri lip dit thiet bi ludn cd nhiing ngudn gay nhieu (site error) Cic nhieu loan niy xiy nhiing vit kim loai gin anten hip thy sdng dien tir va phit xa lai Tin hieu ciing cd the bj nhieu bdi cac dii phit gin hay tuong tic vdi dja hinh mat dit sdng lan truyen tir vj tri set danh den tram thu Trong lip dit, ehiing tdi da lua chgn nhirng vi tri dim bio de eho thiet bj boat ddng tdt nhat Ngoai xir ly sd lieu, thuat toin thdng ke dugc sir dung de loai cic nhieu he thdng dang Nim 2006 vua qua, thiet bj xae djnh thdi gian qua tin hieu GPS tai tram (NghTa Dd, Phii Thuy, Thii Nguyen) duge bd sung Vdi phep dac tam giac(triangulation), ldi xac djnh vj tri se duge giim di ding ke Khi sd lieu eing nhieu nim va cing nhieu tram thi vj tri djnh vi se duge dinh gii mdt cich tdt hon Viee sir dyng ky thuat niy, kit hgp vdi phep dac tam giic giiia cac tram din den ehinh xic dudi 5km cd tip hgp sd lieu nhieu nim Trong qua trinh van hinh eic tep dir lieu tir eic tram dugc giri ve trung tim tai NghTa Dd (Hi Ndi) de xir ly Cac thuat toin ehinh su dung xir ly sd lieu bao gdm: xir ly viing nhieu thiet bj djnh vi; diing thuat toin dae tam giic de xic djnh vj tri ciia set; xem xet ket hgp vdi sd lieu rada, ve tinh, ngiy gid ddng cua eac tram tugng de kiem tra sy phin bd cua cic nhdm phdng dien set; va giii bii toin phin tich khdng gian vi thdi gian de xic dinh cac thdng sd die trung ciia boat ddng ddng set 296 Hdi nghi Khoa hgc ky niem 35 ndm Vien Khoa hgc vd Cdng nghe Viet Nam - Hd Ndi 102010 2.2 Mdt sd ket qua thu dugc Tren binh li tin suit xuit hien set ngiy d cie tram djnh vj set Co the thiy thdi gian boat ddng manh biln dii tiiy theo timg tram tu 14h den 20b Dd thj xu the ehung ed dinh vio budi chieu li mdt nhirng quy luat eo bin ciia boat ddng ddng set d Viet Nam B l ^ trinh fin suit s«t Imng nam - ^ Ngha DO -B-MOcOilu I Bac Lieu j I DOng Hi j - e - Phii Yen I-•-Btnh Thuan : < > ] 10 11 i; I) 1' IS 19 20 ; i 72 23 gK) (rong ng&y Hinh Hogt ddng set ngdy tgi mdt sd trgm djnh vj set ndm 2004 Hinh Tdn sudt xudt hien sit theo thdng ndm 2004 Tin suit boat ddng set tinh theo thing duge the hien tren binh cho sd lieu nim 2004 Tit ci cie dudng cong deu cd dinh phu Set xuit hien sdm d Ddng Hi, Son La (thing vdi tin suit ldn hon 20%) Tiep theo boat ddng set manh nhit vio thing d Phii Yen, Binh Thuin, Ddng Hi O NghTa Dd nim 2004 ddng set boat ddng manh nhit vio thing 6-7 Dinh phu thii hai ciia tit ci eic tram xuit bien vio thing 9-10 Tren sd lieu niy cd the thiy rd sy phin hda theo miia ciia boat ddng ddng set tren linh thd nude ta Sd lieu nhieu nim quan trie ddng ciia cie tram tugng be mat ciing eho nhirng ket luin tuong ty Set li dai lugng die trung cho sy ddi luu Qua nghien ciiu phin tich khdng gian vi thdi gian cd the xic djnh eiu tnic eon ddng, tdc di chuyen, viing bao phu Hinh the bien cu the bon set boat ddng khu vyc Son La ngiy 02/04/04 d ludi 0,40 xO,40 Cic diem dinh diu li diem xiy set dinh Tren binh the hien tdc phdng dien set theo gid tai khu vyc niy Cd the thiy ngiy ed ba eon ddng boat ddng vio cic thdi diem tir 24h, 8-1 Oh, 12-17h Hoat ddng phdng dien set manh nhit d eon ddng diu ed liie dat den 200 eii mdt gid Vio ngiy niy theo sd lieu tram quan trie tugng Son La ciing ed ddng la 00h25->O8b3O, Ih30->12h20, 14h00->16h30 Vi du cho thiy sd lieu phdng dien ed uu dilm hon sd lieu ngiy gid ddng bdi nd cho ta nhin thiy cudng boat ddng set cua eon ddng li rit khie Toe phong dien set ^^ *v» ••^ X 10 12 14 16 18 20 Gid CT WW*'' * ^ »