Research on transient stability control method for LCC‐HVDC receiving‐end system based on the gradient of dynamic energy

A new transient stability control strategy for the Line-Commutated-Converter based High-Voltage-Direct-Current (LCC-HVDC) receiving-end system on gradient of dynamic energy is proposed to deal with this problem. Firstly, in whole process from fault occurrence removal, a function representing constructed. On basis, considering influence Direct Current (DC) inverter side controller, expression under three-phase and single-phase short-circuit scenarios deduced detail. The parameters accumulation or consumption analytically described. Then, term related controller extracted expression, trigger pulse controlled keep DC port at minimum. Finally, hardware loop test carried out RT-LAB. results show that receiving end fault, will inject system, making tend be unstable. This method able reduce rate increase critical clearing time system.