Intelligent analysis and application of stability control of qinshan 500 kV combined switch station based on internet of things technology

The Qinshan 500 kV combined switch station is a switch station for 6 units of the Qinshan No. 2 and No. 3 Nuclear Power Plants, and the safety of its sending is directly related to the operation safety of the North Zhejiang section of East China Power Grid and the nuclear power units. In order to avoid the occurrence and expansion of switching station accidents, the operating personnel should strictly control the power flow and the voltage level in accordance with the stability limits established based on the safety and stability guidelines of the power system. When the operation mode of the external power grid changes, the unit operators face difficulties and challenges in quickly distributing and controlling the unit output on the premise of meeting the operating characteristics of the nuclear power unit. This paper starts from the basis for the establishment of the stability limit, expands and analyzes the stability limit of each operation mode of the Qinshan 500 kV combined switch station, expounds the limit of the stability limit on the switch station, and analyzes the application of the supplementary trip device in solving the transmission limit. At the same time, it borrows the intelligent means of advanced Internet of Things technology to provide a practical and feasible solution for the real-time power distribution control of the unit, and aims to provide a reference for relevant technical personnel such as those involved in the operation, maintenance and production planning. (author)