Nonlinear coordination control strategy of DC power modulation in multi-infeed HVDC power systems

2006 ◽  
Author(s):  
Haojun Zhu ◽  
Zexiang Cai ◽  
Zhou Lan ◽  
Yixin Ni
Keyword(s):  
Power Systems ◽  
Control Strategy ◽  
Coordination Control ◽  
Power Modulation ◽  
Dc Power

Nonlinear modal interaction in HVDC/AC power systems with DC power modulation

1996 ◽  
Vol 11 (4) ◽  
pp. 2011-2017 ◽  
Author(s):  
Y.-X. Ni ◽  
V. Vittal ◽  
W. Kliemann ◽  
A.A. Fouad
Keyword(s):  
Power Systems ◽  
Modal Interaction ◽  
Power Modulation ◽  
Dc Power ◽  
Ac Power ◽  
Nonlinear Modal Interaction

Stability enhancement of DC power systems by VSM control strategy

2021 ◽  
Vol 126 ◽  
pp. 106569
Author(s):  
Yaqian Yang ◽  
Jiazhu Xu ◽  
Chang Li ◽  
Tomislav Dragicevic ◽  
Frede Blaabjerg
Keyword(s):  
Power Systems ◽  
Control Strategy ◽  
Dc Power ◽  
Stability Enhancement ◽  
Dc Power Systems

scholarly journals Effect of DC Link Control Strategies on Multiterminal AC-DC Power Flow

2015 ◽  
Vol 2015 ◽  
pp. 1-15 ◽  
Author(s):  
Shagufta Khan ◽  
Suman Bhowmick
Keyword(s):  
Power Systems ◽  
Control Strategy ◽  
Power Flow ◽  
Flow Model ◽  
Control Strategies ◽  
Test System ◽  
Sequential Method ◽  
Dc Power ◽  
Flow Convergence ◽  
Newton Raphson

For power-flow solution of power systems incorporating multiterminal DC (MTDC) network(s), five quantities are required to be solved per converter. On the other hand, only three independent equations comprising two basic converter equations and one DC network equation exist per converter. Thus, for solution, two additional equations are required. These two equations are derived from the control specifications adopted for the DC links. Depending on the application, several combinations of valid control specifications are possible. Each combination of a set of valid control specifications is known as a control strategy. The number of control strategies increases with an increase in the number of the DC terminals or converters. It is observed that the power-flow convergence of integrated AC-MTDC power systems is strongly affected by the control strategy adopted for the DC links. This work investigates the mechanism by which different control strategies affect the power-flow convergence pattern of AC-MTDC power systems. To solve the DC variables in the Newton-Raphson (NR) power-flow model, sequential method is considered in this paper. Numerous case studies carried out on a three-terminal DC network incorporated in the IEEE-300 bus test system validate this.

Novel of Isolated Multi-Port Converter for Integrating Complex DC Power Systems

2014 ◽  
Vol 134 (10) ◽  
pp. 844-852 ◽  
Author(s):  
Masanori Ishigaki ◽  
Kenichi Ito ◽  
Naoki Yanagisawa ◽  
Shuji Tomura ◽  
Takaji Umeno
Keyword(s):  
Power Systems ◽  
Dc Power ◽  
Dc Power Systems
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