Views: 200 Author: Site Editor Publish Time: 2024-05-27 Origin: Site
The project involved a TR2 transformer (rated capacity: 2,500 kVA) at the production facility of a leading optoelectronics manufacturer in Chongqing, China. This transformer is dedicated to supplying power to the facility's sensitive and critical process equipment, primarily MOCVD (Metal-Organic Chemical Vapor Deposition) machines and other core production tools.
The stable operation of these high-precision tools is directly linked to the plant's production yield, uptime, and product quality.
In the period leading up to the project, the manufacturing facility encountered significant challenges:
Frequent Voltage Sags: The facility, located in an area with a complex power grid, experienced frequent voltage sags, particularly during the summer peak demand months. These sags were severe enough to be detected by the manufacturer's own sensitive equipment.
Direct Production Losses: The voltage sags directly resulted in the production of non-conforming products. In the high-value optoelectronics industry, a single sag event could lead to the scrapping of an entire batch, causing substantial financial loss.
Critical Load Sensitivity: The facility's key machines—Red-Light MOCVD (132 kVA) and Blue-Green Light MOCVD (342 kVA each)—were identified as the most vulnerable loads. The total critical load was calculated at 986 kVA, with future expansion plans adding another 990 kVA for new single-chamber and dual-chamber process tools. This highlighted the growing risk and need for a scalable, reliable protection solution.
After a thorough evaluation, the customer chose a turnkey solution from Sanhe Power Tech, centered around a 2,500 kVA Low Voltage Ride-Through (LVRT) device with a 1.5-second compensation time.
Core Technology: The system uses a proven AC Parallel LVRT topology to ensure stable voltage for sensitive loads during grid disturbances.
Customized Integration: Due to space constraints in the existing electrical room, the solution employed a separated layout design. The switchgear, power cabinet, and energy storage cabinet were arranged independently and side-by-side, optimizing the available space
Performance: The system is designed to respond in ≤1ms, compensate for voltage drops from 0% to 130% of rated voltage, and achieve a >99% efficiency.
Parameter |
Specification |
Rated Voltage / Frequency |
380 V / 50 Hz |
Rated Capacity |
2500 kVA |
Compensation Time |
1.5 seconds |
System Response Time |
≤1 ms |
Voltage Compensation Accuracy |
<1% |
Efficiency |
>99% |
Protection & Cooling |
IP20, Forced Air Cooling |
The LVRT system was commissioned successfully and delivered immediate, demonstrable value.
First Key Test (July 2, 2023): During a severe grid voltage sag where the supply voltage dropped to 120V (approx. 32% of nominal), the LVRT system activated successfully. The voltage at the critical load terminals was stabilized, ensuring zero disruption to production.
Expected Business Benefits (Based on the documented design and initial outcome) :
Elimination of Scrap Losses: Preventing voltage sag-induced production failures.
Reduction in Unplanned Downtime: The system provides a 1.5-second ride-through window to handle even the deepest sags, effectively eliminating this primary cause of costly downtime.
Protection of Future Investments: The system's 2,500 kVA capacity was designed to cover both existing and planned future load expansions, making the solution future-proof.
High Reliability: The high efficiency (>99%) and robust design ensure minimal operational losses and long-term reliability.
Yvonne Zhang –+86 13418990147
yvonne.zhang@samwha-cn.com
www.sanhenergy.com
