ĐỊNH VỊ LÕI CÁP NGẦM BẰNG MÁY PHÁT ÂM TẦN VÀ CÂY DÒ TỪ TRƯỜNG

TDMU, s (28) 2016 T p Khoa h cTDMU ISSN: 1859 - 4433 Sn S 3(28) 2016,Nguyn Thỏng 6Vn 2016 n n n n n n n n n nn n n nn n n n n n n n n n n n n n n n n n n n n n n n n n n n Cụng n n n n n ( ( , thnh ph H Chớ Minh v m t s ) ( thu - th 2.1 c Cụng ty n , n n n ( ( ; 30KV: ( Cross linked Polyethylene (XLPE), Ethylene Propylene Rubber (EPR); h 60KV: c n thi t n 70 TDMU, s (28) 2016 nh v l i cỏp ng m bng mỏy phỏt õm t n Polyethylene (XLPE) n n V a) b) c) n a) b) n n c) n 2.2 n n ( ( mega ( (hỡnh 3) n n ( a ( n 71 n TDMU, s (28) 2016 n Nguyn Vn Sn n n n n n n 2.3 - Cuộn dây - n Vật liệu sắt từ n - , ( n n n n n n n n ( 9) - 72 TDMU, s (28) 2016 V n nh v l i cỏp ng m bng mỏy phỏt õm t n n n n nn n n n n n n ( ( 11 ( 11 V n n n n n n n 12 n n i dõy v bc n : ( n 73 TDMU, s (28) 2016 Nguyn Vn Sn n n 13 n n 14 n n n n n n 15 74 n n n TDMU, s (28) 2016 nh v l i cỏp ng m bng mỏy phỏt õm t n 2.5 n n n n: 16 n n n : K n : c n n n n n n n n bờ K 18 n n n n n n n : cõy d n n n n hai bờn 17 ( 18 75 TDMU, s (28) 2016 Nguyn Vn Sn 2.6 T S n n Tạo sóng sin ph-ơng pháp số n Khuếch đại công suất âm tần Biến áp tự ngẫu Bộ chọn hiển thị mức lối Lối n Đo dòng điện qua tải Khối nguồn nuôi n Biến dòng n sin: 20 n n n n n n n : 27 z ( - ( - n b) c 76 n n n n; (a) c n n nn n n nh, TDMU, s (28) 2016 n 22 n nh v l i cỏp ng m bng mỏy phỏt õm t n n n - v 23 S n n n n n n n ( cụng su ( ( ( 77 TDMU, s (28) 2016 Nguyn Vn Sn g 0A(rms) AV R18 10000 17.9 R15 560 n 24 n n n n ra: n 70Vpp 25 S n n n n n n n n 78 n n TDMU, s (28) 2016 n nh v l i cỏp ng m bng mỏy phỏt õm t n n : n n 27 S n n n n ( n n n n n n n n n 10%; n n : 7Hz; n n n n : h 30, ; 70Vpp; % ( AV (V) 10 20 30 40 50 60 70 100 14 21 28 35 42 50 70 2.5 10 12 15 18 25 100 50 35 25 21 17 14 10 R2 22 22 ( R1 l 79 TDMU, s (28) 2016 Nguyn Vn Sn ( S n n n n n n n n n n n a) b) 80 TDMU, s (28) 2016 nh v l i cỏp ng m bng mỏy phỏt õm t n POWER UNDERGROUND CABLE FAULT LOCATION WITH AUDIOFREQUENCY GENERATOR AND MAGNETIC DETECTOR Nguyen Van Son ABSTRACT This paper introduces a solution about underground cable fault location that belongs to the family of the pinpointing methods using audio-frequency generator and magnetic field detector In addition to the ability to locate underground cable fault, the method of audio-frequency generator and magnetic field detector can detect underground cable routing and measure cable burial depth This paper also introduces the design and manufacture of audio-frequency generator, magnetic field detector of the author Devices were tested by electromechanical workshop of Lam Dong Electricity corporation and demonstrated the devices completely usable [1] http://www.cablejoints.co.uk/sub-product-details/megger-cable-fault-locators# [2] http://www.cablejoints.co.uk/upload/ Cable_Fault_Location_in_Low_&_High_Voltage_Power_Cables _Guide.pdf [3] http://www.cablejoints.co.uk/upload/ Cable_Fault_Location_in_Low_&_High_Voltage_Power_Cables _Guide.pdf [4] https://www.elprocus.com/underground-cable-fault-distance-locator-circuit/ [5] http://ieeexplore.ieee.org/xpl/login.jsp?tp=&arnumber=5522159&url= http%3A%2F%2Fieeexplore.ieee.org%2Fxpls%2Fabs_all.jsp%3Farnumber%3D5522159 Ngy nh n bi 23/04/2016 Ch p nh Liờn h : Nguy n- nt i h c Th D u M t S Tr Th d u M t Email: sonnv@tdmu.edu.vn 81 [...]...TDMU, số 3 (28) – 2016 Nguyễn Văn Sơn ( Sơ n n n n n n n n n n n a) b) 3 ơ ơ ơ ơ ơ ồ ơ 80 TDMU, số 3 (28) – 2016 nh v l i cáp ng m bằng máy phát âm t n POWER UNDERGROUND CABLE FAULT LOCATION WITH AUDIOFREQUENCY GENERATOR AND MAGNETIC DETECTOR Nguyen Van Son ABSTRACT This paper introduces a solution about underground cable fault location