Karkashin Aiki da Noma na Turbin Mai Kirkiro Zabe

1 Mafiyanar Gaji

A cikin shekarun, mafi girman al'adu da kuma tashin shiga (ECTs) ta zama wani muhimmanci na tattalin arziki. Noma dutsen kasa suna kira biyu: Active Optical Current Transformers (AOCTs, active hybrid type) da Optical Current Transformers (OCTs, passive optical type). Active hybrid ECTs sun yi amfani da low-power electromagnetic transformers da Rogowski coils a matsayin abubuwa masu gaji (Figure 1).

Rogowski coils sun fi karfin jiragen hanyoyin masu gajin da kuma yawan yankin, wanda ya sa gajiya da tsarin shiga. Amma, suna da yawan karfi na hanyar kafara (yana da ma'ana ga darajar da kuma kananan gida) da kuma yawan kuskure da kungiyar/hasashe da kungiyar. Daga cikin electromagnetic ECTs, low-power models suna fi karfin: teknologi mai kyau, gaji mai zurfi, inganci mai yawa, da kuma yawan amfani a tattalin arziki.

2 Turanci & Tattalin Aiki
2.1 LPCT: Turanci & Yadda Ake Yi Aiki

LPCT (wani low-power electromagnetic ECT) ana bayyana a cikin GB/T 20840.8—2007 kamar wani ECT implementation. A cikin mafi girman electromagnetic transformers, LPCT’s performance da kuma teknologi mai kyau suna ci gaba da shekaru, tare da yawan amfani a tattalin arziki.

LPCT ya ba tattalin arziki yawan amfani da kuma yawan rahotanni. Ta yi amfani da manyan rawarwaru (misali, iron-based nanocrystalline alloys), don in sami gaji da kuma yawan adadin core.

LPCT an yi amfani da sampling resistor Rs, electromagnetic transformer, da kuma signal transmission unit, ta yi aiki haka: Primary bus current ta shiga zuwa secondary current, wanda sampling resistor ta bari zuwa voltage signal da ke sama da primary current. Double-shielded twisted-wire transmission unit ta barin wannan signal zuwa Intelligent Electronic Device (IED), wanda ya kafa hanyar kafara ga external electromagnetic interference a lokacin da aka barin shi.

2.2 Turanci da Yadda Ake Yi Aiki na Rogowski Coils

Rogowski coils sun fi karfin jiragen hanyoyin masu gajin da kuma yawan yankin, wanda ya sa gajiya da tsarin shiga. Suuna da yawan kirkira, yawan yankin, babu iron core, yawan gadi, yawan kai, da kuma yawan kula/fitar da shi. Maimakon, su suna iya kafara hanyoyin hysteresis da kuma saturation, don in sami gaji da kuma yawan adadin measurements.

Yanzu, soft wires suna kungiyar da kuma hasashe da kungiyar a cikin non-magnetic skeletons (tuba Figure 2) don in sami coils. Da kuma Ampère’s law, integral of magnetic field strength H along a closed contour equals the enclosed current. Amma, yawan kungiyar da kuma hasashe da kungiyar (don in sami consistent cross-sections) yana da yawan kuskure a cikin yadda ake yi, wanda ya kafa yawan karkashin stability.

Don in kawo hakan, optimize coils don system needs. Misali, amfani da PCB - based designs da computer/IT tools don uniform wire layout da kuma digital cross - section processing. Reverse - series winding of two coils can reduce electromagnetic interference, boosting voltage output and accuracy by canceling longitudinal magnetic fields.

Improved PCB Rogowski coils suna kawo hakan da yawan kuskure (misali, poor anti - interference, inaccurate measurements). Da kuma yawan kaya, scientific designs, da kuma precise manufacturing, su ne ideal for power system promotion.

3 Testing Temperature Coefficients of Sampling Resistance & Rogowski Coil Internal Resistance
3.1 LPCT Sampling Resistance Temperature Coefficient Test

A cikin yadda ake yi, yawan gajin da kuma yawan kafar da suka kawo hakan, suka kafara resistance value deviations, wanda ya sa gajiya da tsarin shiga. Resistance ta kafa da temperature, wanda ya kafa yawan kafar da current transformer ratio errors.

Kalmomi: PCB Rogowski coil da LPCT sampling resistance values suna kafa da temperature, wanda ya ba tattalin arziki yawan rikitar da kuma yawan kafar. Saboda haka, scientifically test temperature impacts on PCB Rogowski coils da kuma screen sampling resistors don in tabbatar da transformers meet design/operational stability needs.

3.2 Rogowski Coil Resistance Drift & Ratio Error Test

Operators suna tasiri temperature environments, run PCB Rogowski coils under varied temperatures, record data changes, analyze temperature effects, da kuma optimize designs to improve efficiency.

Wannan test ya ba PCB Rogowski coil performance/suitability for power systems. Using a constant - temperature chamber and LCR tester: place the coil in the chamber, then use LCR/electronic current test systems to measure resistance drift and ratio error, ensuring valid data via controlled temperature conditions (e.g., -50 °C, 250 °C, 450 °C).

Post - test analysis: PCB internal resistance is temperature - sensitive, but temperature minimally affects angular/ratio errors—ensuring power system protection.

4 Kalmomi

Current transformers suna da muhimmanci ga tattalin arziki. Gajin su suna ci gaban stability da kuma amfani da electricity supply. Saboda haka, enhance research on 10 kV electronic current transformers to support China’s power industry’s healthy growth.