Primary Frequency Support Strategy for MTDC System With Enhanced DC Voltage Response

Ayalew, Biyadgie; Moursi, Mohamed Shawky El; El-Saadany, Ehab F.

doi:10.1109/tpwrs.2022.3176875

Cited by 2 publications

(36 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The droop gains are designed considering the specified proportion that ac grids share the disturbance. The reader can refer to [23] for the details of designing the droop gains.…”

Section: M∆f + ∆P Vscsmentioning

confidence: 99%

“…It is shown that the droop gains perform independent of the power losses unlike the one shown in (13). The detail procedure of calculating the frequency droop gain based on the specified weights that establish the disturbance sharing among the ac grids is presented in [23].…”

Section: M∆f + ∆P Vscsmentioning

confidence: 99%

“…Methods with less communication dependency are presented in [20]- [23]. The reported schemes depend on the conventional frequency droop (P − V dc − f ) control; however, similar to the consensus algorithm, weighted based strategy is used to distribute the burden among the participant ac grids.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, the required power may not be traded among the interconnected asynchronous ac areas during frequency support if there are converters that are already fully occupied. As a solution, [23] proposed frequency support strategy that takes the loading of the converters into account. However, the reported scheme can be affected by the dc network parameters and the VSCs power losses as they are neglected in the formulation of the technique.…”

Section: Introductionmentioning

confidence: 99%

“…However, the mechanism didn't consider the steady-state frequency deviation. Recently, [23] proposed a methodology that tries to eliminate the aftermath of converter tripping on the frequency of the interconnected ac power systems. However, in the presented technique, the dc voltage deviation is significant.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Enhanced DC Voltage and Frequency Regulation for High Voltage AC/DC Power Grid

Ayalew

Moursi

El-Saadany

2024

IEEE Trans. Power Syst.

Self Cite

View full text Add to dashboard Cite

This work proposes a primary frequency support mechanism for a voltage source converter (VSC) based multiterminal high voltage dc (MTDC) transmission system that interconnects asynchronous ac grids. For the ac disturbance case, an augmented control strategy composed of a coordinated droop control (CDC) and a supplementary controller is developed. In CDC, the droop constants are determined considering the desired disturbance sharing ratio among the ac areas and the loading of the converters. On the other hand, the supplementary controller makes the designed droop constants provide the expected performance independent of the dc network parameters and the VSCs power losses. Therefore, the augmented controller can make the interconnected ac power systems exchange power according to the specified disturbance sharing ratio. In addition, the work introduces a new power rerouting technique to enhance the frequency and the dc voltage regulation of the ac/dc power system when a VSC trips. Furthermore, the droop constants for the nominal operation are designed to make the ac grids share the disturbance due to wind farm power variation based on their strength. Case studies are conducted for evaluation, and the presented technique shows enhanced performance in frequency (for instance, 38% improvement when ac disturbance happens) and dc voltage (for example, almost zero deviation when converter outage occurs) regulations compared to the existing mechanisms in the literature.Index Terms-Supplementary controller, novel power rerouting mechanism, impact of dc grid and VSCs power losses, coordinated droop gain scheme, frequency support, enhanced dc voltage response, converter outage, MTDC system.

show abstract

“…The droop gains are designed considering the specified proportion that ac grids share the disturbance. The reader can refer to [23] for the details of designing the droop gains.…”

Section: M∆f + ∆P Vscsmentioning

confidence: 99%

Section: M∆f + ∆P Vscsmentioning

confidence: 99%