Transformator - asosiy uskunalar in grid uzatish tizimi. Shuning uchun, xavfsiz ishlashi of transformator o'ynaydi a vital rol ichida grid xavfsizlik. Texnik muhandislar of HUAYI Power explore the the ning sabablari transformator shamollatish deformatsiyasi va natija xavf lar bilan tahlil qilish yo bilan umumiy xatar shamollatish deformatsiyasi ning transformator lari transformerlari uchun ahamiyatga ega hisoblanadi uchun butun grid xavfsizlik tizimi's normal ishlashi. U ahamiyatga ega tarmoq xavfsizlik tizimi's normal operatsiya.
Bizning muhandislarimiz taklif qilgan transformator bo'lganda bo'ysundirilganda qisqa tutashuv joriy yoki boshqa ta'sir, the deformatsiya quyidagicha 3a
shamollatish ning deformatsiyasi sabab tashqi kuchlar kabi ta'sir 2c moyillik va tebranish 1 transportda 2c qaysi qo'rg'oshin shamollatish ko'chirish. Bu deformatsiyalangan shamollatish ega bir xil kattalik, lekin faqat nisbiy ko'chib ketish to asosiy o'zgardi. The induktant of shamollash 2c the inter-tort capacitance are constant, va capacitance o'zgarishlar. General capacitance is kamayadi. In in the equivalent tuman, the rezonans peak peak the rezonans peak 2c esk yuqori chastotaga o'tish tezligi. Shunday qilib solishtirilgan spektrlar, har rezonans nuqta hali mavjud o'lchangan spektrda 2c va o'zgarish sodir bo'lmaydi 2c lekin cho'qqilar o'zgarishi ga to to to yuqori chastota ( o'ngga).)
Qisman deformatsiya orasi tortlar, ba'zi unfixed ip tort siqish ostida the action of the short-circuit elektromagnit force, va the others elongated , (to'g'ridan-to'g'ri bog'langan the two poles of of power, and no current in electrical ampliance) shunday ki o'rtasidagi kapakitance the cakes o'zgardi. The deformatsiya sabablari ba'zi induksiya in in the equivalent circuit to become larger and become small 3b the capacitance between cakes are in parallel with the induktsiya also changes. When measuring induktsiya o'zgarishlar spektr, ba'zi rezonans cho'qqi harakatlari tomon yuqori chastota, va cho'qqi qiymati 3b ba'zi rezonans nuqta harakatlari tomon past chastota 2c va cho'qqi nuqta ko'tariladi. The deformatsiya maydoni va deformatsiya darajasi orasidagi kek lar bilan hukm qilinadi the change of the rezonans peak.
Qisqa tuman the turn (to'g'ridan-to'g'ri bog'langan the two poles of the power, and no current in electrical appliances),theoretically speaking, after the winding kuzatiladi o'rtasida qisqa tuman aylanadi 2c the aylanadi induksiya qiymati kamayadi, spektr egri o'zgarishlar sezilarli, amplituda ko'tarilishi 2c va ba'zi rezonans nuqta cho'qqilari yo'qoladi. Lekin bu ta'limot, aslida uni olish qiyin bo'ladi olish qiyin bo'ladi. Bir marta inter-burilish qisqa tuman operatsiya davomida sodir bo'ladi, the coil bo'ladi yonib chiqish, the og'ir gaz will trip, va bosim relief valve boshlanadi. At bu vaqt, the neft xromatografiya of the transformer (bosim variation) bo'ladi sifatsiz, va transformator tekshiriladi tekshiriladi.
Lead's displacement and deformation, because the lead is very long, when it is not firmly fixed, displacement deformation occurs during operation. When the lead is displaced, two-port capacitance will change in equivalent circuit. When the signal at the entrance of the signal is displaced, but the lead capacitance is in parallel with other circuits, so its chan0does not effect significantly to the spectral curve. However, the output lead displacement occurs, the change of the lead capacitance will significantly change the frequency response curve, especially for the range of 300 kHz to 1 MHz curves. Therefore, in the actual test, the source is injected with a neutral point to prevent the above effects. If the lead-to-ground capacitance is reduced, the amplitude in the frequency band rises, and vice versa. If the lead-to-ground capacitance becomes larger, it indicates that the lead moves toward the shell, and the lead-to-ground capacitance becomes smaller, it indicates that the lead moves toward the winding.
shamollatish radial deformatsiya, bo'lganda shamollatish duchor bo'lganda the radial force, ichki shamollatish bilan shartnoma qilingan 2c ikkala diametr va induksiya kichikroq bo'ladi. At bu vaqtda 2c orasidagi masofa orasidagi masofa the ichki va tashqi shamollashlar kattaroq, ga aylanadi kattaroq, va kattaroq 2c ga aylanadi bu rezonans cho'qqi nuqtasi ichida spektr dan to ko'chib o'tish uchun yuqori chastota, va amplituda oshishiga sabab bo'ladi.
shamollatish burilishlari va deformatsiyalar eksilyuziv. Qachon bo'shliq orasidagi transformatorlar (bosim o'zgarishi) katta yoki ba'zi ularning lari 2c bilan o'zgargan harakat bilan elektr romagnit kuch, the shamollatish buk buk langan an S shakli axial. At bu vaqt, qismi of of the cake capacitance and ground capacitance kamayadi. In the o'lchangan spektr, ba'zi of the rezonans peaks harakat tomon yuqori chastota yo'nalishi, va amplituda ning amplitudasi rezonans ning 1 1 2 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 cho'qqisi pasayadi in the past chastota oralig'ida, the peak of the middle frequency ko'tariladi biroz, va the yuqori chastota oralig'i o'zgarmaydi o'zgarmaydi.
Base on the measurement of internal winding characteristic parameters of transformer, Huayi Power develops RBX-H transformer winding deformation tester, and adopts internal fault frequency response analysis (FRA) method which is explored by developed countries, it can make accurate judgment on the internal fault of the transformer. The device is to quantify the transfers' internal winding parameters with different frequency responds change, and determine the internal winding of the transformer according to the magnitude of the variation, the amplitude of the frequency response, the change of the region and the frequency response change, according to measuring result, it can be determined that whether the transformer is severely damaged and whether maintenance is required. For the running transformer, no matter whether the frequency domain characteristic map is saved before, the degree of fault can be judged by comparing the difference of the characteristic map between the coils of the faulty transformers. Of course, if the original winding characteristic map of the transformer is saved, it is easier to provide more accurate basis for the operation, post-accident analysis and maintenance of transformers.
Xususiyatlar of Huayi power transformator shamollatish deformatsiya tester
Asbob-uskunalar harakati qabul qilinadi DDS raqamli yuqori tezlik süpürücü - chastota texnikasi to to aniq diagnostika xatolar, bunday twisting, o'chirish, o'chirish, o'zgarish qisqa-tuman tuman deformatsiya va o'zgarishlar-to-bosqich aloqa qisqa tutashuv.
Sotib olish nazorati foydalanish yuqori integratsiya mikroprotsessor, tanlangan komponentlar bilan aniqlik va yuqori mustahkamlik, yuqori tezlik dual-kanal {{4}%A/D sam plita (maydon sinov o'zgarishlar o'zgarishlar tap- o'zgartiruvchi, to'lqin shakli egri o'zgarishlar aniq), takror test uchun bir xil faza, the repetitiv rate of measurement is 99,5 foiz dan yuqori .
asbob ikkita o'lchash tizimi, chiziqli svetofor chastota o'lchov va segmentlangan svetofor chastota o'lchov, qaysi mos bilan mos ligi bilan ichki ikkita texnik janr o'lchov rejimlari mavjud hozir.
Faqat ulash avtobus of the transformer needs to be removed in testing process, and all tests to completed to masin the cover and disassembling the transformer.
o'lchashda transformator% 2c sim xodimlar tasodifiy tartibga solishi mumkin the signallari to kirish va chiqish leads, qaysi hech ta'sir yo'q on o'lchov natijalari. The wiring personal can stay on the transformer tank to to a break, shunday ki to kamaytir mehnat intensivligi.
amplitudali-chastota xususiyatlari mos to the national technical indicators of amplituda-chastota xususiyat tester. The abscissa (frequency) is tarkibli chiziqli indekslash va logarifm mik indekslash. Shuning uchun, the printed egri bo'lishi mumkin a chiziqli indekslash egri yoki a logaritmik indekslash egrigriligi egri, va the users can users can select according their needs.
asbob yuqori aqlli, va signal chiqish amplituda shkalasi avtomatik ravishda sozlangan dasturiy ta'minot. The maximum amplituda is c2�10V, va the namunalash chastotasi avtomatik sozlangan.
asbob ga ega funksiya to o'lchov turli chiziqli svetofor- chastota sistemalar, chiziqli svetofor o'lchov chastotasi gacha 2MHz, chastota skan intervallari 7b%7 bb2}}.25kHz, %{0.5kHz va 1kHz, so shunday beradi ko'proq tahlil uchun transformator deformatsiya.
Taʼminlash tarixiy egri chiziq solishtirish tahlili, va yuk koʻp tarixiy egri kuzatishlar at the same time, u tanlash mumkin arbitrar egri chiziqlar va do gorizontal va vertikal tahlil. Mutaxassis aqlli tahlil va diagnostika tizimi, u avtomatik diagnoz qoʻyishi mumkin transformator holati shamollatish, yuk 6 egri chiziqlar at the same time%. 2c avtomatik hisoblang the tegishli parametrlar of of har egri, avtomatik diagnostika the deformation of the shamollash, va give the reference conclusion of diagnosis.
O'lchash va foydalanish usuli
The usual method of detecting transformer is as above. Huayi Power transformer winding deformation tester is mainly composed of a main measuring unit and a notebook computer, and also there are three special measuring cables, measuring clip and grounding wire. The main measuring unit system and the test sample are connected by 50 high frequency coaxial cable, sweep frequency signal goes through the output port (excitation output), and the signal clip (yellow) injects signal into the tested object by connecting cable; the signal is taken from the tested object by signal clip (green), and transmitted by cables (response input); the synchronous reference signal is obtained from the tested object injection point by the signal measurement, and transmitted to the input (reference input) via cables. The shield of the tested case and the testing cable must be reliably connected and grounded. The wire and fuel tank of large transformer are usually connected by iron-core earthing bushing, as common ground point, transformer case is grounded.
Hukm chiqarish printsipi
1. Waveform comparison
Normal operatsion transformator shamollatish lar yaxshi korrelyatsiyalangan uch faza xususiyatga ega. Agar an avariya sabab shamollatish deformatsiyasi 2c the egri chiziqlar oldin va keyin avariya asosan tasodifiy tasodif. 1 ga to'g'ri keladi.
Keyin shamollatish deformatsiyalanadi, the egri chiziqlar oldin va keyin aniq burilish aniq bo'ladi yo'q tasodif, va korrelyatsiya yomon. deformatsiya paytida 2c cho'qqisi qiymati egri chiziq ichida pastki chastota band ning pastki chastotasi bandi 2c pastroq chastota band ning 0}.5-200kHz bo'ladi o'zgaradi, the chastota qo'shilgan yoki kamaytiriladi. Desibellarning raqami mos ga cho'qqi qiymati ham o'zgaradi, va son soni kamayadi. 2c va son soni kamayadi. Desibellarning soni 7b0{0{1}}}}kHz bo'ladi o'zgaradi, va son kamaytiriladi. Desibellarning soni ga mos cho'qqi qiymat ham o'zgaradi, va son soni kamayadi. of peak points will generally decrease.
2. Hakamlik nazariyasi
Solishtirilgan chastota javob egri of of transformer of accident, it the transformer to have the original frequency response curve data.
Solishtirish mahsulotlari bir xil model va ishlab chiqaruvchilar at the same time.
Faza-to-faza solishtirmalar mumkin uch faza yoki bir-faza transformatorlar.
hukm asosida ikkita xususiyat qiymatlar: o'rtacha kvadrat xato Exy va korrelyatsiya koeffitsienti Pxy, the kichikroq exy is, the closer the ikki egri chiziqlar uchun yaxlit uchun. The Closer Pxy is ga 1, the yuqori the o'xshashlik o'rtasidagi ikki egri chiziqlar. Agar ikki yoki ko'proq chastota bandlari mavjud Pxy<0.98 and Exy>3.% 7b{1}}; or Pxy<0.9 and Exy>1.5, or Exy>4,5 va Pxy faqat 0.99, u sabab deformatsiya uchun transformator uchun. Birlashtirilgan boshqa usullar, kabi %"oil xromatografik kabi tahlil", "winding DC qarshilik o'lchov" "short-tuman impedance" "no-yuk yuk sinov" va boshqa usullar to mukammal hakam bo'lsin transformator shamollatish deformatsiyalangan bo'lsin.
HUAYI ning professional tadqiqotlari va rivojlanayotgan korxona uchun elektr quvvat uskunalari (ta'mirlash, test) malakali va quvvat sinov uskunalari Xitoyda. U da sozlash elektr sinov mahsulotlari bilan turli konfiguratsiyalar talab qiladigan turli voltaglar bilan ixtisoslashgan.
HUAYI ning tadqiqoti va rivojlanishida yuqori chastotali elektr sinov uskunalari va turli asboblar! U 24 soat uchun xizmat ko'rsatadi%1 3a % 7b{2{2}}. Ko'proq haqida ma'lumot haqida Huayi , iltimos tashrif bizning saytimiz: www.wh-huayi.com.