Abstract
It is of great significance for improving the safety and stability of the system to realize the coordinated and optimal control between synchronous condenser and DC system in UHVDC converter station. However, the existing dynamic reactive power optimization methods emphasize that the two systems can be scheduled uniformly, which are independent in actual engineering. Therefore, an area-diagram strategy for synchronous condenser and a dividing-stage strategy of reactive power exchange for AC/DC system are proposed here. Then, the setting methods of control parameters for the two systems based on dynamic reactive power optimization are proposed. The work of this paper fully considers the abilities and requirements of the two systems. Taking an UHVDC converter station in Northeast China as an example, the effectiveness of the proposed method is analysed. The simulation results show that the proposed method can effectively reduce the operation times of reactive power compensation devices and improve the operation level of system voltage.
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