In China more and more attention has been paid to the application of high voltage direct current and alternating current parallel connection transmission.A real-time digital power system RTDS is applied to build a model of this,and a steady working condition is analyzed.The system operation condition is simulated,and the effect of fault upon hybrid AC/DC power transmission system is analyzed.

In order to study the function of superconducting magnetic energy storage system in improving the output of wind farm,wind farm model and SMES model are made and four-machine 12-bus benchmark power system is built on the platform of PSCAD.The paper also studies 3 kinds of wind speed in the multi-generator model,and the function of superconducting magnetic energy storage device in the wind farms in the condition of short circuit.The simulation result indicate that the SMES device perfects well in controlling wind farm power flow under the circumstances of different wind speed,shot circuit.