State Estimation for Hybrid VSC Based HVDC/AC Transmission Networks

• Type: Article in International Scientific Journal
• Date: 2020

Authors

Ayiad, M (Author) Other; Helder Leite (Author) FEUP; Martins, H (Author) Other

Journal

Title: Energies

Vol. 13

Final page: 4932

ISSN: 1996-1073

Publisher: MDPI

Indexing

ISI Web of Knowledge - 0 Citations

Scopus - 0 Citations

Other information

Authenticus ID: P-00S-R94

DOI: 10.3390/en13184932

Abstract (EN): As the integration of High Voltage Direct Current (HVDC) systems on modern power networks continues to expand, challenges have appeared in different fields of the network architecture. In the Supervisory, Control and Data Acquisition (SCADA) field, software and toolboxes are expected to be modified to meet the new network characteristics. Therefore, this paper presents a unified Weighted Least Squares (WLS) state estimation algorithm suitable for hybrid HVDC/AC transmission systems, based on Voltage Source Converter (VSC). The mathematical formulas of the unified approach are derived for modelling the AC, DC and converter coupling components. The method couples the AC and DC sides of the converter through power and voltage constraints and measurement functions. Two hybrid power system test cases have been studied to validate this work, a 4-AC/4-DC/4-AC network and Cigre B4 DC test case network. Furthermore, comparison between the fully decentralized state estimation and the unified method is provided, which indicated an accuracy improvement and error reduction.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 27