Review of Designing & Analysis of HVDC Transmission Line

Electrical Engineering

Presently power system operates under a high stress level which was neglected at the moment they were designed. The operating conditions of power system are being threatened form the reliability, controllability and security point of view. HVDC transmission brings a solution to have secure and improve the stability margins of power system. The characteristic like independent control of real and reactive power improves the power system stability and ensures an efficient power transfer. The paper presents different control strategy for Analysis & designing of HVDC Transmission Line a new modeling and control strategy of VSC-HVDC transmission system in order to improve system damping oscillations, and enhancing transient and voltage stability. This control strategy is based on a linear and bilinear state space deviation models. The structure of the control method is designed in order to minimize the number of the control loops (inner and outer control loops) in the classical strategy to one control loop for each output. These control loops are active power or DC voltage for the first output, and the reactive power for the other output.

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