کنفرانس مهندسی برق ایران

صفحه اصلی / سی و چهارمین کنفرانس بین المللی مهندسی برق

Enhanced TRV modeling of high voltage shunt reactors through FEM-derived stray capacitance parameters

نویسندگان :

Aref Nikraftar¹ Milad Mohammadhosein² Mohammadhamed Samimi³

1- دانشگاه تهران 2- دانشگاه تهران 3- دانشگاه تهران

کلمات کلیدی :

shunt reactor،Transient recovery voltage،High voltage circuit breaker،COMSOL،Multiphysics،Electromagnetic modeling

چکیده :

Shunt reactors are widely deployed in extra-high and high-voltage transmission systems to compensate line charging reactive power and to control overvoltage. Accurate electromagnetic parameterization of these reactors is essential for transient studies, especially for evaluating circuit-breaker performance during switching operations. In this project, the transient recovery voltage (TRV) of a 63 kV, 100 MVAR air-core type shunt reactor is analyzed following load current interruption. For doing so, the reactor is modeled in COMSOL Multiphysics to obtain its lumped and distributed electrical parameters. The stray capacitances and coupling terms are extracted through a Maxwell capacitance matrix formulation, while winding inductances and resistances are derived from the electromagnetic solution. The resulting parameter set is then imported into a well-known power-system transient simulation software, named EMTP/PSCAD, to analyze reactor switching transients and to determine the circuit breaker’s transient recovery voltage (TRV) characteristics, including peak magnitude, rate of rise of recovery voltage (RRRV), and dominant oscillation frequency. The study provides a physics-based pathway from detailed 2-D axisymmetric field modeling to network-level TRV assessment, supporting reliable breaker selection and insulation coordination for shunt-reactor applications.