VSC HVDC control strategy based on burst mode operation for low voltage ride through

Liu, Tao; Liu, Weizeng; Hao, Xiang; Liu, Yatao; Tang, Mingjie

doi:10.1109/ipemc.2016.7512877

Cited by 2 publications

(1 citation statement)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…From the receiving-end grid VQ curve of the reactive power supply and load, the load reactive power suddenly increases significantly, and the load VQ curve shifts upward (Liu et al, 2016). If the reactive power supply capacity is insufficient, the voltage at the new intersection of the VQ curves of the reactive power supply and the load decreases, thus forcing the reactive power supplier to increase the output of Q and the load side to decrease consumption.…”

Section: Characterization Of the Ac Network At The Receiving Endmentioning

confidence: 99%

Study on the characteristic of the grounding fault on the cascaded midpoint side of the hybrid cascaded HVDC system

et al. 2023

View full text Add to dashboard Cite

The hybrid cascaded high-voltage direct current (HVDC) system combines the system support capabilities of the modular multilevel converter (MMC) with the capacity of the line-mutated converter’s (LCC’s) advantage of high-power transmission. The HVDC system is among the key elements of a smart grid where artificial intelligence is applied extensively. However, the characteristics of a grounding fault on the cascaded midpoint side of a hybrid cascaded HVDC system remain unclear. This study analyzes fault characteristics and the impact of faults using analytical methods. First, the topology and basic control strategy are presented. The fault response process is then analyzed by dividing systems into the MMC and LCC parts at the inverter side. A separate theoretical analysis is also conducted. In addition, the impacts of faults on HVDC and alternating current (AC) networks are analyzed. Therefore, even after the HVDC system is disabled, the AC network can supply fault currents using an antiparallel diode. The simulation results show that the proposed analysis method is feasible, and the theoretical analysis is correct. The proposed method can provide a theoretical basis for the selection of equipment for HVDC systems and smart grid construction.

show abstract

Section: Characterization Of the Ac Network At The Receiving Endmentioning

confidence: 99%

Study on the characteristic of the grounding fault on the cascaded midpoint side of the hybrid cascaded HVDC system

et al. 2023

View full text Add to dashboard Cite

show abstract

Controlled islanding algorithm for AC/DC hybrid power systems utilising DC modulation

Fan

Crisostomi

Thomopulos

et al. 2020

IET gener. transm. distrib.

View full text Add to dashboard Cite

The controlled islanding problem is typically considered only for pure ac power systems, with the ultimate objective of either minimising power imbalance or power-flow among islands. However, as ac/dc hybrid power systems are becoming popular worldwide, current controlled islanding schemes should be redesigned to take into account the presence of high-voltage dc (HVDC) links, possibly connecting different islands. Accordingly, in this study, the authors solve the classic islanding problem combining HVDC power modulation with the conventional ac cutset search. The flexibility of the HVDC allows the authors' strategy to jointly capture the previously mentioned objectives, and provides even lower power imbalances than the minimum imbalance strategy, at a relatively small cost of increasing power-flow impact. Then, the optimisation problem is formulated as a mixed-integer linear programming problem, which can be conveniently solved with existing commercial solvers. Finally, they validate their proposed strategy in two case studies, corresponding to a modified IEEE-118 system and to the China Southern Power Grid system. In both cases, dynamic simulations show that their proposed approach outperforms classic algorithms where the presence of HVDC power modulation is not explicitly taken into account.

show abstract

VSC HVDC control strategy based on burst mode operation for low voltage ride through

Cited by 2 publications

References 9 publications

Study on the characteristic of the grounding fault on the cascaded midpoint side of the hybrid cascaded HVDC system

Study on the characteristic of the grounding fault on the cascaded midpoint side of the hybrid cascaded HVDC system

Controlled islanding algorithm for AC/DC hybrid power systems utilising DC modulation

Contact Info

Product

Resources

About