Centralized versus distributed state estimation for Hybrid AC/HVDC grid

Publikationstyp
Conference Paper
Publikationsdatum
2017-09
Sprache
English
Author
Grahn, Pontus 
Briggner, Viktor 
Johansson, Linus 
Babazadeh, Davood orcid-logo
Nordström, Lars 
TORE-URI
http://hdl.handle.net/11420/8906
Volume
2018-January
Start Page
1
End Page
6
Citation
IEEE PES Innovative Smart Grid Technologies Conference Europe (ISGT-Europe 2017)
Contribution to Conference
IEEE PES Innovative Smart Grid Technologies Conference Europe, ISGT-Europe 2017 
Publisher DOI
10.1109/ISGTEurope.2017.8260167
Scopus ID
2-s2.0-85046257163
The need of transmission grid expansion has drawn the attention towards high voltage DC (HVDC) as a solution. This brings new challenges for power system control application such as state estimation that are originally designed for AC power system. This papers studies centralized and distributed architectures for hybrid AC/HVDC state estimator (SE). Furthermore, the benefit of having bad data detection (BDD) and deploying phasor measurement units (PMU) in the state estimation are investigated. The method used for the SE is the weighted least square (WLS) method. The SE will be developed based on the power grid model 'The CIGRE B4 DC Grid Test System'. The results of the tests show that the addition of BDD and PMU improved the error of the estimated values. Furthermore the distributed architecture offered slightly less accurate AC values than the centralized.
Schlagworte
HVDC transmission
Phase measurement units (PMU)
State estimation
Voltage source converter (VSC)
Weighted least square (WLS)