Research on the Coordination Control Strategy of Variable Speed Pumping Storage Unit and Multi-terminal Flexible and Straight System

To satisfy the absorbing capacity of a high proportion of new energy in future power systems, a flexible HVDC transmission system is the first choice of new energy base resource delivery, and a variable speed pumping storage unit is one of the best solutions to ensure the stability of new energy delivery power system. Based on Zhang Bei engineering structures containing flexible HVDC system, and based on the variable speed pump storage unit set up simulation system with soft the differences between the direct power control system characteristic and variable speed pump storage unit with soft straight system coordinated control strategy, the matching of variable speed pump storage unit and soft straight system control performance, avoid to produce control conflict, To improve the system quickly absorb large-scale new energy power generation capacity. This paper studies the fluctuation characteristics of large-scale new energy and the operation characteristics of pumped storage power stations on a long time scale, and puts forward the optimal operation mode of pumping storage power station and PIUS-direct combined system in a long time scale according to their coordination.