Disturbance Management in a DC Grid using a Hierarchical Control Structure
(2015) Cigré International Symposium- Abstract
- DC grids will play a key role in the future, interconnecting generation and load centers as well as energy markets. Large multi-terminal VSC-HVDC systems of high capacity will require automated coordination for several operation scenarios especially when operating under disturbances. With this in mind, and considering the dynamics of a DC system, communication loss events are considered severe disturbances in the operation of the multi-terminal system along with major electrical faults such as 3-phase faults on the AC sides of the converters that require considerable coordination efforts. This work aims at enabling the multi-terminal system with communication loss ride-through and automatic post-fault rescheduling capabilities. This is... (More)
- DC grids will play a key role in the future, interconnecting generation and load centers as well as energy markets. Large multi-terminal VSC-HVDC systems of high capacity will require automated coordination for several operation scenarios especially when operating under disturbances. With this in mind, and considering the dynamics of a DC system, communication loss events are considered severe disturbances in the operation of the multi-terminal system along with major electrical faults such as 3-phase faults on the AC sides of the converters that require considerable coordination efforts. This work aims at enabling the multi-terminal system with communication loss ride-through and automatic post-fault rescheduling capabilities. This is achieved within a hierarchical control structure whose features are briefly described. A 3-terminal VSC-HVDC system is modelled for the needs of demonstration under different operation scenarios. Communication loss ride-through capability is demonstrated by comparing the behavior of the 3-terminal system during a normal operation scenario and a worst-case scenario where communications with all-three terminals fail. Its behavior does not change but since communications fail, the operation is uncoordinated greatly reducing the security of the system regarding upcoming events. During 3-phase faults DC droop performs the primary control stabilizing the system. Secondary control is performed by the overall control after the system state is identified. Automatic, post-fault rescheduling takes place in an effort to follow the power flow schedule where possible without exceeding substation limits. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/cd3a4d9e-523b-4829-b3a6-92548132976a
- author
- Karatsivos, Evripidis LU ; Svensson, Jörgen LU and Samuelsson, Olof LU
- organization
- publishing date
- 2015
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- keywords
- HVDC Grid, Multi-terminal, Control - Hierarchical, Disturbance
- host publication
- Lund Symposium 27/28 May, 2015
- article number
- 365
- publisher
- CIGRE (International Council on Large Electric Systems)
- conference name
- Cigré International Symposium
- conference location
- Lund, Sweden
- conference dates
- 2015-05-27 - 2015-05-28
- language
- English
- LU publication?
- yes
- id
- cd3a4d9e-523b-4829-b3a6-92548132976a
- alternative location
- http://www.malmokongressbyra.se/kongress/download/1517_364.pdf
- date added to LUP
- 2016-06-17 06:20:11
- date last changed
- 2018-11-21 21:24:18
@inproceedings{cd3a4d9e-523b-4829-b3a6-92548132976a, abstract = {{DC grids will play a key role in the future, interconnecting generation and load centers as well as energy markets. Large multi-terminal VSC-HVDC systems of high capacity will require automated coordination for several operation scenarios especially when operating under disturbances. With this in mind, and considering the dynamics of a DC system, communication loss events are considered severe disturbances in the operation of the multi-terminal system along with major electrical faults such as 3-phase faults on the AC sides of the converters that require considerable coordination efforts. This work aims at enabling the multi-terminal system with communication loss ride-through and automatic post-fault rescheduling capabilities. This is achieved within a hierarchical control structure whose features are briefly described. A 3-terminal VSC-HVDC system is modelled for the needs of demonstration under different operation scenarios. Communication loss ride-through capability is demonstrated by comparing the behavior of the 3-terminal system during a normal operation scenario and a worst-case scenario where communications with all-three terminals fail. Its behavior does not change but since communications fail, the operation is uncoordinated greatly reducing the security of the system regarding upcoming events. During 3-phase faults DC droop performs the primary control stabilizing the system. Secondary control is performed by the overall control after the system state is identified. Automatic, post-fault rescheduling takes place in an effort to follow the power flow schedule where possible without exceeding substation limits.}}, author = {{Karatsivos, Evripidis and Svensson, Jörgen and Samuelsson, Olof}}, booktitle = {{Lund Symposium 27/28 May, 2015}}, keywords = {{HVDC Grid; Multi-terminal; Control - Hierarchical; Disturbance}}, language = {{eng}}, publisher = {{CIGRE (International Council on Large Electric Systems)}}, title = {{Disturbance Management in a DC Grid using a Hierarchical Control Structure}}, url = {{http://www.malmokongressbyra.se/kongress/download/1517_364.pdf}}, year = {{2015}}, }