A Wave Digital Kalman Filter Approach for Fault Detection in DC Grids: A Case Study

Fault detection in DC grids requires new concepts for the design of protection devices. A promising concept for predictive circuit protection is model based learning, e.g. Kalman estimation. It requires detailed system models of electrical circuits. An established modeling technique in circuit theory is the wave digital principle which preserves circuit passivity and stability. This contribution combines both ideas and derives a Kalman filter in the wave digital domain.