Maimaituwar Tansufuran Da Take Dukkana Aiki Don Ingantaccen Gida na Grid

1. Nau'in Girma

Kowane mai bada kadi da kowane mai magana na gini (PV) da kowane abubuwan da ke aduna suna tashi har maƙalantar da Vietnam da Southeast Asia, amma suna da wadanda suke iya daki:

1.1 Kama'a cikin Sabis:

Sabis na alamuwa na Vietnam yana da kyakkyawan gyara-gyara (na farkon a wadanda suke tsoro). A shekara ta 2023, kama'a a sarari ta kada ta shuka da rashin alamuwa, sauya hasken alamuwa a karkashin USD 5 jaman dollar. TSunayen PV suna da kama'a cikin inginciki na neutral, wanda ya sa abubuwan samanin yawa suka yi kama'a lokacin da sabis ya kamata. Wannan yana nuna muhimmin abubuwan da ke aduna.

1.2 Daidaitattun Hukuma da Gaskiya:

Daidaitowa na Vietnam a shekarar 2024 yana buƙe waɗansu abubuwan da ke aduna su tabbatar da 72-hour islanding operation test na Vietnam Electricity Group (EVN) kuma su da mahimmanci na high/low voltage ride-through (HVRT/LVRT). Tare da yawan samanin alamuwa, zero-sequence current da harmonic issues suna da kyakkyawa, koyaushe suna shaida matakai. Abubuwan da ke aduna masu mahimmanci suna da muhimmanci don tabbatar da wannan hukuma.

1.3 Buƙatar Ida'addun Duniya:

Juyawa da ruwa (ruwan sama >80%) suna iyaka zaman lafiyar abubuwa, wanda ya buƙe wa abubuwan da ke aduna su da mahimmancin anti-corrosion da moisture-proof. Tsarin sama na kusurwar rani (salt content >5mg/m³) yana iyaka corrosion, wanda ya zama abubuwan da ke aduna suna da kyaututtuka.

2. Amsawa: Nau'in Abubuwan Da Ke Aduna

2.1 Tsarin Teknoloshi Na Uku

Zigzag Connection Grounding Transformer:

Yana da nau'in shashan shashan uku (six-winding design) tare da kishin 1250kVA, zero-sequence impedance 4-6Ω (daga 30Ω a abubuwan da ke yau), da kama'a na 25kA/2s, wanda ya fito ga yankin abubuwan da ke farawa.

• Harmonic Suppression Optimization: Yana da Δ-YY winding structure tare da LC filters, wanda ya samu ≥85% suppression na 3rd/5th/7th harmonics, kamar THD daga 12% zuwa <5%, wanda ya kare abubuwan samanin yawa. Wannan yana da muhimmin gaskiya don abubuwan da ke aduna.
• Environmental Adaptability Enhancement: Enclosure tare da IP54 protection rating; abubuwan da ke mahimmanci suna da nano-ceramic coating, sun pass IEC 60068-2-52 salt spray testing (3000 hours with no corrosion). Wadannan yana da muhimmin abubuwan da ke aduna a wuraren da ke harshi.
• Thermal Management Design: Yana da aluminum alloy heat sinks da forced air cooling system, temperature rise controlled to ≤55K a 45°C ambient temperature. Wannan yana da muhimmin abubuwan da ke aduna a wuraren tropical.

2.2 Nau'in Monitoring da Protection System

Integrated Sensor Module: Real-time monitoring na winding temperature, partial discharge, da insulation status; bayanin samuwa a local SCADA da cloud platforms (kamar Hoymiles S-miles Cloud) a milliseconds. Monitoring yana iyaka gaskiya na abubuwan da ke aduna.

Protection Logic Coordination:

• Circuit Breaker Coordination: Automatically switches grounding mode within 10 seconds upon detecting grid voltage drop to 20%UN (meeting Vietnam's low-voltage lockout requirements)
• Arc Fault Detection (AFCI) System Integration: Cuts off fault circuits within 0.5 seconds, preventing ground faults from causing fires. This rapid protection logic integrates seamlessly with the grounding transformer.

2.3 Localized Adaptability Improvements

Grid Compliance: Supports EVN-required islanding test mode, simulating seamless transition to energy storage supply after grid interruption. The grounding transformer is a core component for passing this critical test.

Pre-installed sealing wire interfaces meet Vietnam's mandatory metering room sealing requirements.

Maintenance Convenience: Design service life ≥25 years; maintenance cycles extended to 3 years, significantly reducing O&M costs in tropical regions. The durability of the grounding transformer substantially lowers lifecycle costs.

3. Abubuwan Da aka Samu

3.1 Iyaka Gaskiya da Rashin Kama'a

Yana samun neutral grounding switching a 15ms lokacin da sabis ya kamata (daga 50ms standard na Vietnam), wanda ya kama load masu mahimmanci (kamar factory production lines) suyi aikin. Abubuwan da ke aduna suna da mahimmanci, sun kare failure rate by 85% kuma sun kare grounding-related incidents bayan aikawa a 2024 Hanoi industrial zone project.

3.2 Fa'idar Tattalin Arzikin da Kula Da Koyar

• Yanayi na Risarin Kaɗa: Yana kula da koyar tattalin arziki na "Gwamnatin Zafi," wanda ya ba da kaɗa 3% na tasiri gida.
• Tsakiyar Wannan Tsawon Dukkuka: Ta haka da kudin adadin kudin (yanayi 35%) da kuma yanayin kudin cikin lokaci, IRR ta zama ta ƙara da 2-3 babbu, wanda ya tsakiyar wannan tsawon dukkuka daga 5.8 zuwa 4.2 shekaru.

3.3 Ingancin Amsa na Grid

An samu aiki na yin nuna kudin kiyaye: Idan an yi kiyaye na EVN (idani maɗaɗin gwamna <75%), yana kula da kudin aiki na 30% na tsari, wanda yake iya bayyana masanin kwalliya su a tattalin Frequency Regulation Market (FRM). Amsa na tsari mai kyau da aka bayyana shi ne da aikin grounding transformer yana ƙunshi aikin inganci. A matsayin ƙarin bayanai, a wasu aiki na pilot a birnin Ho Chi Minh, tare da aiki na bayyana reactive power, an samu zarura 12% na tattalin arziki daga aiki na bayyana.