Systems and methods of power system state estimation

US11320492B2 · kind B2 · utility

Assignees

• GLOBAL ENERGY INTERCONNECTION RESEARCH INSTITUTE CO., LTD. · CN
• State Grid Corporation of China · CN
• STATE GRID JIANGSU ELECTRIC POWER CO. LTD. · CN
• State Grid Shanxi Electric Power Company · CN

Inventors

• Yingzhong Gu · San Jose, US
• Guanyu Tian · San Jose, US
• Chunlei Xu · Nanjing, CN
• Qibing Zhang · Nanjing, CN
• Ruisheng Diao · San Jose, US
• Di Shi · Taizhou City, CN

Key dates

• Filing date: Nov 6, 2020
• Grant date: May 3, 2022
• Expiry date: Nov 6, 2040

Classification

• Technology area (CPC G): Physics
• CPC primary: G06N3/084
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

State estimation in an electric power system includes acquiring electrical measurements from the electric power system at a reporting rate of the electrical measurements, processing the electrical measurements into sequence data including positive sequence data, processing positive sequence data by an observable state estimator to generate a plurality of estimated states including a plurality of estimated observable states, parameters of the observable state estimator being updated by a first training module in a first time thread, processing the plurality of estimated states by an unobservable state estimator to generate a plurality of estimated unobservable states, parameters of the unobservable state estimator being updated by a second training module in a second time thread independent of the first time thread, and outputting a plurality of final estimated states generated by concatenating the plurality of estimated observable states and the plurality of estimated unobservable states.