Keywords Hybrid AC/DC power systems, Hierarchical control,Multi-infeed,Interaction,Active and reactive power modulation,Hybrid simulation,Noulinear control,Coordinaed recovery,Commutation failures;

• 交直流混合电力系统;多馈入直流输电系统;紧急功率支援;混合仿真模型;相互作用特性;非线性控制;协调恢复;有功及无功调制;递阶控制;换相失败;