Feem pua Qhov Sib Txawv Sib Txawv Rau Kev Tiv Thaiv Peb Phaj Hloov Hloov: 7 Kauj Ruam

2024 Tus sau: John Day | [email protected]. Kawg hloov kho: 2024-01-30 09:26

Hauv Cov Lus Qhia no, Kuv yuav qhia koj yuav ua li cas Feem pua Sib Txawv Sib Txuas Sib Txuas siv Arduino, uas yog cov tswj hwm microcontroller ntau heev. Lub zog hloov hluav taws xob yog cov cuab yeej tseem ceeb tshaj plaws los hloov lub zog hauv lub zog.

Tus nqi los kho lub tshuab hloov pauv puas yog siab heev (lab daus las). Tias yog vim li cas kev tiv thaiv txuas tau siv los tiv thaiv lub zog hloov pauv los ntawm kev puas tsuaj. Nws yooj yim los kho qhov xa tawm ntau dua li hloov pauv. Yog li, Sib txawv sib kis tau siv los tiv thaiv kev hloov pauv los ntawm kev ua txhaum sab hauv. Qee qhov xwm txheej nws tsis ua haujlwm lossis ua haujlwm tsis zoo vim MI tam sim no, nyob ruaj khov dhau qhov kev xav ntawm cov tub ntxhais, sab nraud ua yuam kev thaum muaj CT saturation, lub zog hloov pauv piv tsis sib xws, ua haujlwm vim siab thib ob sib xyaw ua ke. Hauv qhov xwm txheej no feem pua kev tiv thaiv kev sib txawv, kev tiv thaiv kev sib txawv tsis sib xws yog siv, feem.

Kauj Ruam 1: Simulation (MatLab - Simulink)

Simulation tau ua tiav ntawm software MATLB Simulink Daim duab qhia pom simulation daim duab ntawm cov kab ke uas hloov pauv tau tiv thaiv los ntawm feem pua sib txawv sib kis. Simulation tsis yog raws li hauv qab no:

Simulation Parameters:

Thawj theem hluav taws xob rau theem rms ……………… 400V

Qhov theem hluav taws xob theem ob rau theem rms ………….220V

Lub zog qhov hluav taws xob …………………………………………… 400V

Zaus Zaus ……………………………………….50Hz

Kev Ntsuas Hluav Taws Xob ……………………………………..1.5KVA

Transformer Configuration …………………………… Δ/Y

Kuj …………………………………………………………..300 Ohm

Kauj Ruam 2: Hloov Qauv

Daim duab qhia pom simulation qauv ntawm kev tsim sib txawv relay. Qhov kev xa tawm no siv thawj thiab theem thib ob ntawm lub zog hloov pauv raws li kev ntsuas ntsuas thiab muab cov txiaj ntsig tso tawm hauv daim ntawv ntawm Boolean sib txawv.

Relay tso zis yog siv los ntsuas qhov ntsuas hluav taws xob rau ntawm qhov chaw sab. Circuit Court breaker ib txwm kaw thiab qhib thaum nws tau txais cov ntsiab lus 0.

Kauj ruam 3: Khoos phis tawj sib dhos

Kho vajtse xav tau rau Tus Kws Qhia Txawv Sib Txawv Sib Txawv muaj raws li hauv qab no:

• 3 × Lub Hwj Huam Transformer (440VA - Ib Leeg)
• Arduino MEGA328
• LCD 16 x 4
• 6 × ACS712 Sensors Tam Sim No
• Txuas Txuas
• 3 × 5V Relay Module
• Qhov ntsuas

Txhua yam tau sib sau ua ke raws li daim duab simulation.

Kauj ruam 4: Ua haujlwm

"Kev tiv thaiv sib txawv raws li lub hauv paus ntsiab lus ntawm lub hwj chim nkag mus rau lub tshuab hloov pauv hauv ib txwm muaj xwm txheej yog sib npaug rau lub zog tawm"

Hauv qhov phiaj xwm tiv thaiv no nchuav (sib txawv) tam sim no tsis piv rau qhov muaj txiaj ntsig tab sis nws txawv raws li kev nkag tam sim no txawv. Txawm hais tias, Nws piv nrog feem ntawm kab tam sim no. Raws li kev nce tam sim no, tus nqi feem ntawm qhov tam sim no kuj nce ntxiv. Pib inrush magnetizing tam sim no yog txawm tias siab heev tab sis nws tau tswj hwm los ntawm feem pua sib txawv sib kis. Vim tias thaum cov tswv yim tam sim no nce ntxiv, qhov feem pua ntawm cov kab tam sim no kuj nce ntxiv thiab txuas nrog tiv thaiv cov lus teb ib ntus ntawm kev hloov pauv.

Muaj ob qhov kev ntsuas ua txhaum:

1. Ua txhaum sab hauv
2. Kev txhaum sab nrauv

Kauj ruam 5: Qhov tshwm sim

Case 1 (Internal Fault): t Relay Logic = 1 I = Max

t> 0.5 Relay Logic = 0 I = Zero

Case 2 (Sab Nraud Txhaum Cai):

t Relay Logic = 1 I = Maxt> 0.5 Relay Logic = 1 I = Infinity

Kauj Ruam 6: Arduino Code

Tam sim no nws yog lub sijhawm rau qhov tseem ceeb tshaj plaws-coding peb Cov Relay …

Kauj Ruam 7: Tus Qauv Kawg

Thesis zaum kawg kom paub meej ntxiv yog txuas hauv qab no.