Abstract
Droop gains in direct current (DC) transmission grids are commonly studied using static indicators like V-I curves and power-sharing calculations. The dynamic studies of voltage source converters high-voltage DC have been challenging because of numerous control loops and complexities in DC-alternating current interactions, which is becoming even more challenging with converter to converter interactions in DC grids. This paper firstly presents a 126th-order multiple-input multiple-output small-signal dynamic linearized model of a five-terminal DC network, which includes all converter dynamics and controls in detail. The model accuracy is verified against a detailed benchmark model in PSCAD. The model is then employed to design DC voltage droop control at each of the four terminals considering the dynamics and transient behavior of the DC network. A root-locus study is used to find the optimum values of the droop gains and the cutoff frequency of the DC voltage feedback filters. The PSCAD model is employed to verify the design results and also to test large disturbances like converter tripping in the test DC grid. The study highlights the benefits of DC droop control and also points the possible dynamics instabilities with incorrectly tuned droop parameters.
| Original language | English |
|---|---|
| Pages (from-to) | 429-443 |
| Number of pages | 15 |
| Journal | International Transactions on Electrical Energy Systems |
| Volume | 26 |
| Issue number | 2 |
| Early online date | 28 May 2015 |
| DOIs | |
| Publication status | Published - Feb 2016 |
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Keywords
- droop control
- eigenvalues
- gain selection
- modeling
- multiterminal HVDC
- stability
ASJC Scopus subject areas
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering
- Modelling and Simulation
Cite this
DC voltage droop gain for a five-terminal DC grid using a detailed dynamic model. / Jamshidi Far, Ali Akbar; Jovcic, Dragan; Alsseid, Aleisawee Mohamed.
In: International Transactions on Electrical Energy Systems, Vol. 26, No. 2, 02.2016, p. 429-443.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - DC voltage droop gain for a five-terminal DC grid using a detailed dynamic model
AU - Jamshidi Far, Ali Akbar
AU - Jovcic, Dragan
AU - Alsseid, Aleisawee Mohamed
N1 - Acknowledgement This project was funded by European Research Council under the Ideas program in FP7; grant no 259328, 2010.
PY - 2016/2
Y1 - 2016/2
N2 - Droop gains in direct current (DC) transmission grids are commonly studied using static indicators like V-I curves and power-sharing calculations. The dynamic studies of voltage source converters high-voltage DC have been challenging because of numerous control loops and complexities in DC-alternating current interactions, which is becoming even more challenging with converter to converter interactions in DC grids. This paper firstly presents a 126th-order multiple-input multiple-output small-signal dynamic linearized model of a five-terminal DC network, which includes all converter dynamics and controls in detail. The model accuracy is verified against a detailed benchmark model in PSCAD. The model is then employed to design DC voltage droop control at each of the four terminals considering the dynamics and transient behavior of the DC network. A root-locus study is used to find the optimum values of the droop gains and the cutoff frequency of the DC voltage feedback filters. The PSCAD model is employed to verify the design results and also to test large disturbances like converter tripping in the test DC grid. The study highlights the benefits of DC droop control and also points the possible dynamics instabilities with incorrectly tuned droop parameters.
AB - Droop gains in direct current (DC) transmission grids are commonly studied using static indicators like V-I curves and power-sharing calculations. The dynamic studies of voltage source converters high-voltage DC have been challenging because of numerous control loops and complexities in DC-alternating current interactions, which is becoming even more challenging with converter to converter interactions in DC grids. This paper firstly presents a 126th-order multiple-input multiple-output small-signal dynamic linearized model of a five-terminal DC network, which includes all converter dynamics and controls in detail. The model accuracy is verified against a detailed benchmark model in PSCAD. The model is then employed to design DC voltage droop control at each of the four terminals considering the dynamics and transient behavior of the DC network. A root-locus study is used to find the optimum values of the droop gains and the cutoff frequency of the DC voltage feedback filters. The PSCAD model is employed to verify the design results and also to test large disturbances like converter tripping in the test DC grid. The study highlights the benefits of DC droop control and also points the possible dynamics instabilities with incorrectly tuned droop parameters.
KW - droop control
KW - eigenvalues
KW - gain selection
KW - modeling
KW - multiterminal HVDC
KW - stability
UR - http://www.scopus.com/inward/record.url?scp=84957435957&partnerID=8YFLogxK
U2 - 10.1002/etep.2097
DO - 10.1002/etep.2097
M3 - Article
AN - SCOPUS:84957435957
VL - 26
SP - 429
EP - 443
JO - International Transactions on Electrical Energy Systems
JF - International Transactions on Electrical Energy Systems
SN - 2050-7038
IS - 2
ER -