Kurba na ƙwarewa masu shiga a ɗan wasa mai zurfi na HVDC Simulink

Hanyar Circuit Breaker da IGBT Simulink Electronic Interruption

A hanyar circuit breaker da IGBT Simulink electronic interruption (kamar da shi a saka na farko), yadda current fault ya faru daga yanayin gaba zuwa yanayin interrupter tare da IGBTs a yanayin 1. Amma, yadda current zero-crossing local ya faru tare da set of IGBTs a yanayin 2.

A saka na uku, current fault short-circuit ta faru tsakanin circuit breaker a t1. Sannan, a t2, an yi interruption current a yanayin 1 (kamar da shi a saka na farko), kuma current fault ya faru zuwa yanayin 2. Ba t3, an yi interruption current a yanayin 2 kuma ya faru zuwa yanayin 3. High impedance a yanayin 3 ya ba da fadada voltage haske har zuwa lokacin da surge protector ya kawo wani limits a t4. Wannan voltage ana kiranta Transient Interruption Voltage (TIV).

Yana da kyau a tabbatar da cewa daga t4 baki daya, system ya faru zuwa recovery, kafin da current a cikin fault ba a yi interruption completely ba. Yanayin faulty ya zama isolated daga yanayin normal a cikin system. Daga wannan baki, voltage (da ita mai fiye da rated system voltage) ya rage current zuwa zero, saboda inductive energy a cikin system ya kusa da surge protector a yanayin 4.

Bayani na Diagram

• A t1 : Current fault short-circuit ta faru tsakanin circuit breaker.

• A t2 : IGBTs a yanayin 1 sun yi diversion current fault zuwa yanayin 2.

• A t3 : IGBTs a yanayin 2 sun yi diversion current fault zuwa yanayin 3.

• A t4 : High impedance a yanayin 3 ya ba da fadada voltage haske, kuma surge protector ya yi limit wani, tare da Transient Interruption Voltage (TIV) ya faru.

Tattalin Recovery na System

• Isolation Fault: Daga t4 baki daya, yanayin faulty ya zama isolated daga yanayin normal a cikin system.

• Recovery Voltage: Voltage, da ita mai fiye da rated system voltage, ya rage current zuwa zero.

• Dissipation Energy: Inductive energy a cikin system ya kusa da surge protector a yanayin 4, tare da system ya ci gaba zuwa operation na normal.

Ta haka, hanyar circuit breaker ya iya yi handling short-circuit faults quickly da kuma effectively, tare da protection power system daga damage.