A Performance Comparison Study of Quasi-Dynamic State Estimation and Static State Estimation

With the increasing number of installed phasor measurement units and other intelligent electronic devices, dynamic state estimation has become a possibility for power systems. This paper presents a comparative performance study between quasi-dynamic state estimation (QSE) and static state estimation...

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Bibliographic Details
Main Authors: Xie, Boqi, Sakis Meliopoulos, A. P., Zhao, Dongbo, Xie, Jiahao, Zhong, Chiyang, Vasios, Orestis, Liu, Kaiyu
Format: Conference Proceeding
Language:English
Subjects:
exciter
generator
governor and turbine
quasi-dynamic state estimation
static state estimation
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Summary:With the increasing number of installed phasor measurement units and other intelligent electronic devices, dynamic state estimation has become a possibility for power systems. This paper presents a comparative performance study between quasi-dynamic state estimation (QSE) and static state estimation (SSE). In this study, generators are modeled with governor, turbine, and exciter models, which capture the slow dynamics. The QSE adopts the full model of the generator incorporating the slow dynamics from the electromechanical transients in the rotor, control of the turbine, etc. SSE utilizes frequency domain models without dynamics, so it employs a simplified generator model. State estimation is applied to these two different modeling approaches, and an illustrative example is used to present the performance difference between these two state estimation methods. The results indicate that QSE is capable of providing more accurate information of the monitored system compared with SSE.
ISSN:1944-9933
DOI:10.1109/PESGM41954.2020.9282017