Enhancing power system state estimation by incorporating equality constraints of voltage dependent loads and zero injections

• Type: Article in International Scientific Journal
• Date: 2018

Authors

Mehdi Kabiri (Author) Other; Nima Amjady (Author) Other; Miadreza Shafie-khah (Author) Other; João P. S. Catalão (Author) FEUP

Journal

Title: International Journal of Electrical Power & Energy Systems

Vol. 99

Pages: 659-671

ISSN: 0142-0615

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 3 Citations

Scopus - 6 Citations

INSPEC

Other information

Authenticus ID: P-00N-KYS

DOI: 10.1016/j.ijepes.2018.02.016

Abstract (EN): This paper presents a new state estimation (SE) method including equality constraints to model voltage dependent loads and zero injections. Formulation of conventional SE, assuming simple constant power model for the system's loads, is modified to incorporate voltage dependent load models. Assuming reliable load models and zero injections, it is analytically proved that modeling the equality constraints leads to better SE accuracy. To numerically validate the analytical findings, the proposed SE method is implemented on the IEEE 118-bus test system and the large-scale real-world Iran's power system, and its obtained results are compared with the results of conventional SE. Also, it is shown that considering voltage dependent load model in SE formulation leads to better performance of bad data detection. Moreover, it is illustrated that the accuracy of the proposed SE has low sensitivity to load model identification error.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 13