Flexible DC power grid control and protection system

The invention provides a flexible direct-current power grid control and protection system which is applied to a flexible direct-current power grid converter station. The system comprises a direct-current workstation, a pole control device, a direct-current station control device, a coordination control device, a pole protection device, a direct-current bus protection device, a direct-current line protection device, an external interface device and a direct-current merging device which are connected with one another through a local area network to realize data sharing. Meanwhile, the system can monitor and measure all direct-current equipment in the converter station and upload monitored and measured data to the direct-current work station, so that control protection and monitoring of the flexible direct-current power grid are realized. 本申请提供了柔性直流电网控制与保护系统，应用于柔性直流电网换流站中。所述系统包括直流工作站、极控制装置、直流站控装置、协调控制装置、极保护装置、直流母线保护装置、直流线路保护装置、外部接口装置和直流合并装置，相互之间通过局域网相连，以实现数据共享。同时该系统可对换流站站内所有直流设备进行监视与测量，将监视与测量数据上送至直流工作站，实现对柔性直流电网