Adaptive method for Designing & Analysis of HVDC Transmission Line

Electrical Engineering

Power systems are currently operating under a high amount of stress, which was disregarded when they were created. From the perspectives of controllability, security, and dependability, the operational circumstances of the power system are in danger. HVDC transmission offers a way to secure and enhance the power system's stability margins. The capacity to independently control actual and reactive power enhances the stability of the power system and assures effective power transfer. In order to reduce oscillations in the VSC-HVDC transmission system and increase transient and voltage stability, this method introduces a new modeling and control strategy. The linear and bilinear state space deviation models serve as the foundation for this control technique. The control method's structure is created to reduce the number of control loops (both inner and outer) used in the conventional strategy to only one control loop per output. For the first output, these control loops use active power or DC voltage, and for the second output, reactive power. The effectiveness of the control strategies and the validity of the resulting models are demonstrated by simulations for the VSC-HVDC transmission system model.A grid connected back to back VSC-HVDC modeled in MATLAB/ Simulink environment and a current mode control strategy was implemented. The simulation was done to have an observation of a faster and independent control of real and reactive power.

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