Smart monitoring for renewable power stations
We design and manufacture box-type transformer measurement, control and protection units for solar and wind plants — in use at 1,000+ projects across China and overseas since 2011.
- 2011Founded in Beijing
- 1000+Solar and wind projects
- 31Chinese provinces, plus Pakistan, Malaysia, Vietnam and Cambodia
- 3Product generations, all developed in-house
What we make
Every solar or wind plant has dozens to hundreds of box-type transformers (pad-mounted step-up substations) spread across the site. Our NSA-series Smart Station Monitoring Units sit inside each one. They measure voltages, currents and temperatures; collect breaker, switch and alarm states; switch breakers on command; provide local protection; and send everything back to the plant SCADA.
Unlike a conventional design that needs three separate boxes, one NSA unit combines the transformer measurement & protection device, the communication gateway for inverters, combiner boxes and meters, and the fiber-ring switch. That cuts secondary-equipment cost, wiring and failure points.
Why plant owners and transformer makers choose AOYI
3-in-1 design
Measurement & protection, communication gateway and fiber switching in a single unit — fewer devices to buy, install and commission.
Open protocols
MODBUS-RTU, IEC 60870-5-103/104 and IEC 61850, with protocol conversion for downstream RS-485 devices.
Built for harsh sites
−40 °C to +70 °C operation, EMC tested to GB/T 14598 (IEC 60255) series, opto-isolated inputs with surge protection.
Cable health monitoring
NSA3 adds cable sheath grounding-current monitoring and wireless (433 MHz) cable-joint temperature sensing.
Proven worldwide
- Pakistan, Quaid-e-Azam Solar Park (900 MW, Punjab): NSA6320 box transformer monitoring units supplied for the project built by Zonergy — a priority project of the China–Pakistan Economic Corridor (reported by China Electric Power News, 6 Aug 2015).
- Malaysia: 49 MW solar plant for SUMEC.
- Customers in China: plants owned by China Huaneng, China Datang, China Huadian, SPIC, CHN Energy, China Resources Power, China Three Gorges, CGN, State Grid and others; units supplied through leading transformer makers such as TGOOD, TBEA, CHINT Electric and Mingyang Electric.
Certified quality
- PCCC product certification
- NSA3 certified by Power (Beijing) Certification Centre to DL/T 478-2013 and GB/T 7261-2016 (type test + factory inspection), valid to Feb 2031.
- ISO 9001:2015
- Quality management system for the design, R&D and sales of box transformer monitoring and protection units, valid to Jan 2029.
- Carbon footprint
- Product carbon footprint verified to ISO 14067:2018 (cradle-to-gate): 0.05 tCO₂e per unit for NSA2 and NSA3, 0.068 tCO₂e for NSA6000.
- 100% factory testing
- Every unit is tested for communication ports, functions and accuracy (relay-protection test set), then burned in for 48 hours including 75 °C high-temperature aging and timed power cycling, and re-tested before shipment.
- Also
- CE marking · National High-Tech Enterprise · in-house manufacturing in Beijing.
Contact
- Emailsales@aoyipower.com
- Phone+86 10 8646 1328
- Address3B12-2, Yinhe Port Sci-Tech Innovation Center, No. 9 Jinghai 6th Road, Beijing Economic-Technological Development Area, Beijing 100176, China
- CompanyBeijing Aoyi Xinyuan Technology Co., Ltd. (北京奥一新源科技股份有限公司)