Study on Selective Phase Breaking Technology of High Voltage Circuit Breaker

As the grid load increases and the short-circuit current of the regional grid affects the breaking capacity of circuit breakers, this paper studies the real-time evaluation of the short-circuit breaking capacity of high-voltage AC circuit breakers and the method of phase-selection breaking control, and proposes a selection based on grid parameters Control strategy for phase breaking. The basic principle of phase-selective breaking is described, various parameters of circuit breaker breaking performance are analyzed, the electric grid breaking arc model is established, and the arc resurgence probability is analyzed. The 61-node real power grid topology and related parameters are selected, the short-circuit point is set, and the overvoltage and arc reignition probability of three-phase breaking and phase-selective breaking are compared and analyzed by simulation software. The simulation results prove the phase-selective breaking proposed in this paper. The effectiveness and superiority of the strategy.