| State Estimation has become more important since the development of Smart Grid. More data are available to monitor the system's states in real time, due to the use of variable meters such as Phasor measurement unit. The requirements of estimation accuracy and efficiency have also been raised.;The research conducted in this thesis is mainly focus on the accuracy im- provement of the estimated state variables when facing different types of bad data from available measurements. This thesis presents a new robust estimator based on least-trimmed-square and least-absolute-value, whose results are more accurate than existing robust estimators.;6-bus, IEEE 14-bus and IEEE 30-bus systems are used to evaluate the perfor- mance of the proposed estimator. |
