City's power supply quality tops the country

A press conference themed “power quality” was held in Shenzhen on Nov. 24, aiming to promote the innovation of power quality management mechanisms and technology, enhance the awareness of power protection among power users, and help the city further improve its business environment through power management.

First of its kind in the country, the conference was jointly hosted by the Shenzhen power supply bureau of China Southern Power Grid and the city’s industry and information technology bureau.

Statistics released by the city’s power supply authority at the conference show that in the last year, the average power outage time of power users in Shenzhen is 32 minutes, which is lower than that of first-tier cities in the world such as London; the voltage stability rate was 99.999 percent; and the city’s power quality indicators ranked first in the country in the country’s annual business environment assessment.

The achievements above are attributed to a series of efforts that the city’s power supply bureau has made. Since 2005, the bureau had started exploring systematic solutions to power quality.

The bureau has established the country’s largest urban power grid power quality monitoring system and the country’s first demonstration base of power quality experimentation and technology in Shenzhen, which can dynamically monitor the power quality status of the entire power grid in real time and spot hundreds of power problems such as voltage sag, low or high voltages, and three-phase imbalance.

In addition, in cooperation with power supply units, universities and scientific research institutions, the bureau has established the country’s first smart city high-quality power supply laboratory to explore new technologies and methods for power quality management. Some of the research results were honored by being recognized with the city’s first prize for science and technology progress.

Over 300 power clients such as Huawei and SMIC have also enjoyed one-to-one customized service initiated by the authority, which has been duplicated for use by some cities in Hainan, Sichuan, and Henan provinces.