Generalized State Estimation of Flexible AC Power Systems Considering Wind Generators and Primary Frequency Control

作者：Alcaide Moreno Boris A; Fuerte Esquivel Claudio R^*; Castro Luis M; Zamora Cardenas Enrique A

来源：Electric Power Components and Systems, 2015, 43(13): 1534-1547.

DOI：10.1080/15325008.2015.1042596

• State estimation
• wind generator
• primary frequency regulation
• facts controllers

This paper proposes a practical approach to incorporate the mathematical models of both fixed-speed and variable-speed wind turbine generators, automatic load frequency controls as well as voltage magnitude and frequency dependent loads into a weighted least squares-based state estimation algorithm suitable for the analysis of flexible alternating current (AC) transmission systems. As opposed to conventional static state estimators, where the inclusion of these electric components has been neglected so far, the proposed approach permits the determination of the steady state operation of a power system in the event of a supply-demand unbalance by estimating the magnitude of the frequency deviation from its nominal value. The state estimation is based on measurements related to those that should be obtained by a supervisory control and data acquisition (SCADA) system and phasor measurement units. For the purpose of this paper, the set of values associated with SCADA measurements (nodal power injections, power flows, and voltage magnitudes) and phasor measurement unit (PMU) measurements (voltage and current phasors) are generated from a power flow analysis of the network under study. Lastly, numerical simulations are reported to demonstrate the effectiveness of the proposed approach.

• 出版日期2015-8-9