Title :
Modeling and stability analysis of MTDC grids for offshore wind farms: A case study on the North Sea benchmark system
Author :
Chaudhuri, Nilanjan Ray ; Majumder, Rajat ; Chaudhuri, Balarko ; Pan, Jiuping ; Nuqui, Reynaldo
Author_Institution :
Imperial Coll. London, London, UK
Abstract :
Modeling of VSC-based multi-terminal DC (MTDC) grids for modal analysis and stability studies is reported considering bipolar converters and DC cable network with metallic return path. The proposed model is flexible enough to accommodate different converter grounding options and unbalance on the DC side due to cable and/or converter outage. A simplified version of the benchmark test system for the envisioned offshore MTDC grid in the North Sea is studied. Modal participation factor analysis under nominal and converter outage conditions is used to ascertain the nature and root cause of the dynamic responses. Comparison of the time-domain simulation results using the proposed averaged model in Matlab/SIMULINK against a detailed switched model in EMTDC/PSCAD confirm the accuracy of the modeling approach.
Keywords :
benchmark testing; dynamic response; earthing; modal analysis; offshore installations; power cables; power convertors; power system stability; wind power plants; DC cable network; EMTDC-PSCAD; Matlab-Simulink simulation; North Sea benchmark test system; VSC-based multiterminal DC grids; bipolar converters; converter grounding options; converter outage conditions; dynamic responses; modal participation factor analysis; offshore MTDC grids; offshore wind farms; stability analysis; switched model; time-domain simulation; Analytical models; EMTDC; Equations; Mathematical model; PSCAD; Resistance; Switches; Modal analysis; Multi-terminal DC (MTDC); Participation factor; Stability; Voltage source converter (VSC); Wind;
Conference_Titel :
Power and Energy Society General Meeting, 2011 IEEE
Conference_Location :
San Diego, CA
Print_ISBN :
978-1-4577-1000-1
Electronic_ISBN :
1944-9925
DOI :
10.1109/PES.2011.6039577
