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HVDC SYSTEMS MODELING
THE MULTITERMINAL HVDC LOAD FLOW
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A-stable ac and dc ac system ac voltage ac-dc system algebraic equations backward Euler behavior block diagram boundary nodes capacitor computed controller equations CONV converter equations cosy dc controllers dc converter dc current dc load flow dc network dc transmission line different time steps dual step trapezoidal dynamic equa equations describing example firing angle function blocks Gear's second order implemented inductor input integration formula interface block iterative Jacobian matrix large time step mode MULTITERMINAL HVDC SYSTEMS network equations Norton equivalent numerical integration numerical methods numerical solution numerical stability ordinary differential equations oscillations output quantities reactance reactive power representation representing rule of integration rule with damping second order method sequential set of algebraic set of ordinary step trapezoidal algorithm techniques thesis tion transfer function trapezoidal integration trapezoidal method trapezoidal rule University of Wisconsin-Madison User Defined Controller vector