State estimation method development for SCADA and synchronized phasor measurements within power system

Synchronized Phasor Measurements in a Dual Layer Hybrid State Estimator

Original scientific paper The architecture of the proposed Dual Layer Hybrid State Estimator starts with the linear state estimator that only takes synchrophasors as inputs and calculates states of the buses with the deployed Phasor Measurement Units (PMUs) and their adjacent buses. These states are used to obtain the pseudomeasurements that are processed together with conventional SCADA measur...

Optimal Placement and Utilization of Phasor Measurements for State Estimation

This paper presents a procedure by which new PMU locations can be systematically determined in order to render an observable system. The procedure is then extended to account for cases of loss of a single phasor measurement unit (PMU). Buses with zero and non-zero injections, and branches with power flow measurements are also accounted for in this generalized procedure. Several cases involving ...

Estimation of Electromechanical Modes in Power Systems using Synchronized Phasor Measurements and Applications for Control of Inter-Area Oscillations

POWER SYSTEM STATE ESTIMATION A. Power System State Estimation The conventional method for power system state estimation is the weight least squares (WLS) state estimation

This paper proposes the stochastic tabu search (STS) for improving the measurement scheme for power system state estimation. If the original measured scheme is not observable, the additional measurements with minimum number of measurements are added into the system by STS so that there is no critical measurement pair. The random bit flipping and bit exchanging perturbations are used for generat...

Optimal Placement of Phasor Measurement Units for Improving Power System State Estimation Accuracy: A Heuristic Approach

This paper describes a heuristic approach for optimal placement of phasor measurement units (PMUs) in power system for improving state estimation accuracy. PMUs are able to measure highly accurate bus voltage phasors as well as branch current phasors incident to the buses at which PMUs are installed. Due to cost consideration of PMU placement, power grid utilities are interested in the knowledg...