Open AccessCoordinating fault ride through strategy for connection of offshore wind farms using VSC‐HVDC under single polar fault
Author(s) -
Ge Siyang,
Liu Kaipei,
Qin Liang,
Ran Xiaohong,
Li Gang,
Pu Qingxin,
Liu Dong
Publication year - 2019
Publication title -
the journal of engineering
Language(s) - English
Resource type - Journals
ISSN - 2051-3305
DOI - 10.1049/joe.2018.8814
Subject(s) - offshore wind power , submarine pipeline , fault (geology) , connection (principal bundle) , polar , marine engineering , computer science , environmental science , geology , engineering , electrical engineering , wind power , seismology , physics , mechanical engineering , oceanography , astronomy
Bipolar VSC‐HVDC scheme is one of the most feasible transmission technologies to integrate offshore wind energy source. While one pole stops by suffering even a transient fault, the other pole will block soon due to the overcurrent, then the wind turbines will trip which would cause a critical impact on power system. A novel coordinating fault ride through strategy is proposed to solve the problem here. First, the operational behaviour of DFIG under the integration voltage regulation is analysed; Second, based on the power generation characteristics of DFIG with different terminal voltage, a coordinating strategy without any additional communications requirements is presented, utilising the flexibility power electronics converters both in DFIG and VSC‐HVDC; Finally, the adaptive control scheme considering the constraints of both wind farms and DC system is verified by PSCAD/EMTDC, and the results show that the strategy can effectively regulate the current through the non‐fault pole and provide active support for the AC grid during transient faults.