China's First Precise Flexible Stability Control System Starts Operation in Southern Power Grid
TapTechNews August 5th news, according to the evening news of the Southern Power Grid on August 5th, the country's first precise flexible stability control system began to be put into operation. This system takes the lead in realizing the rapid and continuous control of new energy storage resources at the hundred-millisecond level, improving the load control accuracy by 1000 times, and achieving precise control of non-residential electricity use and the flexible control of substituting regulation for cutting at the hundred-millisecond level for new energy storage.
It is introduced that the Southern Power Grid operates with AC-DC hybrid connection, and the power grid needs to be equipped with a safety and stability control system. In case of serious faults such as large-capacity DC blocking, stable control measures such as generator tripping and load shedding are quickly taken to prevent the system stability from being damaged.
In March 2024, taking Nansha District, Guangzhou City as a pilot, a precise flexible stability control system with a multi-dimensional hierarchical and zoned system architecture was built. The load shedding control mode has changed from the traditional 110-kilovolt switch mode to the hundred-millisecond-level precise real-time control of the user branch switch of the 10-kilovolt ring main switch cabinet, avoiding residential and important loads, realizing the precise control of the load shedding amount and the accurate division of user objects, and improving the refined management and control level of the safety and stability defense line.
For the problem of insufficient utilization of flexible resources such as light, storage, and charging, Guangzhou Power Supply Bureau chose the Furong new energy storage power station and took the lead in organizing the research and development and commissioning of a safe and controllable flexible intelligent stability control terminal suitable for flexible resources such as new energy storage in the country. The measured full-power adjustment in place time of new energy storage is 137 milliseconds, and for the first time in the country, it has creatively realized the continuous adjustment and control of flexible resources.
TapTechNews found out that this system has been incorporated into the actual operation of the Kunliulong DC stability control system. Through the precise and flexible regulation and control of the system load and new energy storage, it ensures the safe and stable operation of the AC-DC large power grid and becomes a promotable and replicable sample for the stability control system of large receiving-end urban power grids.