Fault Ride-Through Strategy of New Energy through Flexible DC Based on Wind Power Shedding and Energy Consumption Device

In response to the DC side over-voltage problem caused by the inability of the flexible DC system to actively regulate the active power conveyed by the system and the slow regulation of wind turbines during the AC system failure of the receiving end in the flexible DC transmission system of new energy, a new system fault traversal strategy that considers wind power load shedding and energy consumption devices. Firstly, the over-voltage mechanism of the flexible direct transmission system in the new energy base was analyzed, and then a wind power load shedding strategy was proposed based on the requirement of wind turbine low voltage crossing; Finally, when the fault at the receiving end exceeds the load shedding adjustment margin, the optimized direct current energy consumption equipment is proposed, and a joint crossing control method combining wind farm voltage reduction and load shedding with DC energy consumption device is proposed. The simulation results show that the joint ride through control method can improve the economy and fault ride through capability of the wind power flexible direct transmission system and achieve stable control of DC voltage.