Research on LCC-MTDC and STATCOM technology for wind farms integration

Li, Guanglei; Teng, Wei; Guanyang, Li; Wang, Hongzhao; Wang, Yaoyao; Liu, Guodong

doi:10.1109/ei2.2017.8244413

Cited by 2 publications

(1 citation statement)

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“…The latter hybrid scheme is firstly proposed in [11], which series LCC with VSC to construct a hybrid converter station, and the VSC topology adopted two-level voltage source converter (2L-VSC), which can only be used for low voltage situation due to the power losses and serial IGBT dynamic voltage balancing problem. With the birth of an advanced VSC topology: multilevel modular converter (MMC) [12], the serial scheme has raised more attention [13]. The supreme demerits of MMC such as low voltage distortion and high reliability can provide the LCC better performance under ac system fault and disturbance.…”

Section: Introductionmentioning

confidence: 99%

Research on Serial VSC-LCC Hybrid HVdc Control Strategy and Filter Design Scheme

Cheng¹,

Xie²,

Wang³

2020

Energies

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This paper investigated the characteristics of a novel type of hybrid high voltage direct current (HVdc) converter, which is composed by line commutated converter series with voltage source converter. The system and valve level control strategies are introduced, which can provide ac system voltage support. A novel filter design scheme composed by resonant filers for hybrid HVdc are also proposed, which can decrease the capacity of reactive power compensation equipment without deteriorate harmonic characteristics. The ac voltage of HVdc fluctuation level caused by transmitted power variation will be effectively reduced, with the coordination between filter design scheme and converter control. In addition, the influence of ac grid strength is also analyzed by equivalent source internal impedance represented by short circuit ratio (SCR). Finally, the +800 kV/1600 MW hybrid HVdc system connecting two ac grids under different SCR cases are studied, and the PSCAD/EMTDC simulation results have validated the effectiveness for proposed strategy.

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Section: Introductionmentioning

confidence: 99%