To ensure stable power supply, Nanjing Telecom Jishan Data Center selects Delta's power quality solution

With the full implementation of the Internet+ strategy, China Telecom Nanjing Branch actively seized the development opportunities, optimized the allocation of telecommunications resources, and built the Nanjing Telecom Jishan Computer Room, which covers an area of ​​100 acres and has a total construction area of ​​186,000 square meters. It is a large data center in East China, with many major Internet customers settled in. In order to ensure the power supply reliability of the computer room, Nanjing Telecom Jishan Computer Room selected Delta's third-generation reactive power compensation device to ensure the power supply safety of user equipment operation.

At present, IDC computer rooms use a large number of inverters, switching power supplies, UPS, and HVDC nonlinear load devices, which will generate a large amount of harmonic currents and capacitive reactive power, pollute the power supply system environment, occupy the capacity of the distribution system, cause fines to the power company, and cause serious heating of the power supply and distribution system, poor reliability when the oil generator is powered, and other problems, which seriously endanger the normal operation of the IDC computer room. Delta's power quality solution has rich and successful experience in the field of IDC computer rooms of communication operators. In this project, in order to solve the power quality problem of Nanjing Telecom Jishan computer room, Delta provided the third-generation PQCS series enhanced static reactive generator for centralized load management.

Delta's PQCS series enhanced static VAR generator is suitable for comprehensive power quality management of low-voltage transformers in distribution systems, and can simultaneously perform reactive power compensation, harmonic control, and three-phase imbalance control. Compared with traditional capacitor compensation solutions, it has accurate, bidirectional, and fast reactive power compensation capabilities, and eliminates the resonance risk of capacitor systems; compared with traditional SVG solutions, it adds the necessary harmonic control capabilities, effectively dealing with reactive power problems while solving the impact of harmonics, and completely solving most of the power quality problems of users with the highest cost-effectiveness.

In the Nanjing Telecom Jishan computer room project, through on-site investigation, Delta selected the access point of the SVG reactive compensation generator in the power distribution system, determined the installation position of the current transformer (CT) according to the installation position of the load, and formed an open-loop control circuit. The entire open-loop control system can dynamically monitor the load current, and make a real-time difference comparison with the power supply current value based on the measured value of the CT, so as to determine the output or compensation current of the SVG: when it is a leading current, the SVG continuously outputs controllable reactive power; when it is a lagging current, the SVG continuously absorbs controllable reactive power, thereby achieving the effect of improving the power factor and reducing harmonics.

The successful implementation of Delta's third-generation PQCS series enhanced static reactive generator has helped Nanjing Jishan Telecom solve the harmonic and reactive power problems in the power distribution system, and has also brought better economic benefits. At the same time, it has ensured that its power supply system operates more safely and reliably. This project is also another successful application of Delta in large-scale IDC telecommunications equipment rooms.