Rcd Rules and Power Systems Observability

Power system state estimation is a process to find the bus voltage magnitudes and phase angles at every bus based on a given measurement set. The state estimation convergency is related to the sufficiency of the measurement set. Observability analysis actually tests this kind of problem and guarantees the state estimation accuracy. A new and useful algorithm is proposed and applied in this paper for power system observability. Through the use of this practical method, one can test the observability of power systems for a specific measurement set. In this new method, which we call Row-Column Diagonal (RCD) method, the electric power network is transformed to a useful graphical network named pseudo-network and then observability study is applied. This new method is implemented on some example networks which are already tested.