On-off control system of photovoltaic power station

The invention discloses a switching control system of a photovoltaic power station, which is connected in parallel between the low-voltage side of a main boosting transformer T1 and a current collection wire bus, and comprises a circuit breaker QF1, a circuit breaker QF2, a thyristor VT, a bidirectional converter DBL, a transformer T2, a super capacitor energy storage assembly SC and a controller, after the circuit breaker QF1 and the thyristor VT are connected in parallel, one end is connected to the low-voltage side of the main boosting transformer T1, and the other end is connected with a current collection wire bus; one end of the circuit breaker QF2 is connected with the current collection wire bus, and the other end of the circuit breaker QF2 is connected with one end of the transformer T2; the super capacitor energy storage assembly SC and the bidirectional converter DBL are connected in series and then are connected to the other end of the transformer T2; the controller is connected with the circuit b