DC voltage control and power dispatch of a multi-terminal HVDC system for integrating large offshore wind farms

2011 ◽  
Vol 5 (3) ◽  
pp. 223 ◽  
Author(s):  
L. Xu ◽  
L. Yao
Keyword(s):  
Voltage Control ◽  
Wind Farms ◽  
Offshore Wind ◽  
Offshore Wind Farms ◽  
Dc Voltage ◽  
Hvdc System ◽  
Power Dispatch ◽  
Dc Voltage Control

scholarly journals Implementation of DC voltage controllers on enhancing the stability of multi-terminal DC grids

2021 ◽  
Vol 11 (3) ◽  
pp. 1894
Author(s):  
Moussa Belgacem ◽  
Mohamed Khatir ◽  
Mohammed Abdeldjalil Djehaf ◽  
Sid Ahmed Zidi ◽  
Riyadh Bouddou
Keyword(s):  
Control Strategies ◽  
Voltage Control ◽  
Wind Farms ◽  
Voltage Regulation ◽  
Green Energy ◽  
Offshore Wind ◽  
Dc Voltage ◽  
Dc Voltage Control ◽  
Simulation Results ◽  
The Stability

Because of the increasing penetration of intermittent green energy resources like offshore wind farms, solar photovoltaic, the multi-terminal DC grid using VSC technology is considered a promising solution for interconnecting these future energies. To improve the stability of the multi-terminal direct current (MTDC) network, DC voltage control strategies based on voltage margin and voltage droop technique have been developed and investigated in this article. These two control strategies are implemented in the proposed model, a ±400 kV meshed multi-terminal MTDC network based on VSC technology with four terminals during the outage converter. The simulation results include the comparison and analysis of both techniques under the outage converter equipped with constant DC voltage control, then the outage converter equipped with constant active power control. The simulation results confirm that the DC voltage droop technique has a better dynamic performance of power sharing and DC voltage regulation.

scholarly journals Resilient DC voltage Control for Islanded Wind Farms Integration Using Cascaded Hybrid HVDC System

2021 ◽  
pp. 1-1
Author(s):  
Peiyu Meng ◽  
Wang Xiang ◽  
Yong-Ning Chi ◽  
Zhibing Wang ◽  
Weixing Lin ◽  
...  
Keyword(s):  
Voltage Control ◽  
Wind Farms ◽  
Dc Voltage ◽  
Hvdc System ◽  
Dc Voltage Control

scholarly journals Impact of Primary Frequency Control of Offshore HVDC Grids on Interarea Modes of Power Systems

Energies ◽  
2019 ◽  
Vol 12 (20) ◽  
pp. 3879 ◽  
Author(s):  
Ali Bidadfar ◽  
Oscar Saborío-Romano ◽  
Vladislav Akhmatov ◽  
Nicolaos A. Cutululis ◽  
Poul E. Sørensen
Keyword(s):  
Power Systems ◽  
Frequency Control ◽  
Wind Farms ◽  
Offshore Wind ◽  
Offshore Wind Farms ◽  
Dc Voltage ◽  
Simultaneous Use ◽  
Primary Frequency ◽  
Primary Frequency Control ◽  
The Impact

Offshore high-voltage DC (HVDC) grids are developing as a technically reliable and economical solution to transfer more offshore wind power to onshore power systems. It is also foreseen that the offshore HVDC grids pave the way for offshore wind participation in power systems’ balancing process through frequency support. The primary frequency control mechanism in an HVDC grid can be either centralized using communication links between HVDC terminals or decentralized by the simultaneous use of DC voltage and frequency droop controls. This paper investigates the impact of both types of primary frequency control of offshore HVDC grids on onshore power system dynamics. Parametric presentation of power systems’ electro-mechanical dynamics and HVDC controls is developed to analytically prove that the primary frequency control can improve the damping of interarea modes of onshore power systems. The key findings of the paper include showing that the simultaneous use of frequency and DC voltage droop controls on onshore converters results in an autonomous share of damping torque between onshore power systems even without any participation of offshore wind farms in the frequency control. It is also found that the resulting damping from the frequency control of offshore HVDC is not always reliable as it can be nullified by the power limits of HVDC converters or wind farms. Therefore, using power oscillation damping control in parallel with frequency control is suggested. The analytical findings are verified by simulations on a three-terminal offshore HVDC grid.

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