Research and Engineering Application of Controllable Line Commutated Converter Valve-Control System

This paper introduces a valve control system designed based on the topology of the Controllable Line Commutated Converter(CLCC). The system can control the CLCC valve according to pole control instructions and monitor various operational parameters of CLCC valve in real time, which provides reliable protection for the safe operation of the CLCC valve. Additionally, the valve control system features historical data query and real-time waveform recording functions, offering crucially support for post-event analysis. In June 2023, the world -leading and first domestic CLCC valve was successfully commencing operation at Shanghai Nanqiao Converter Station. Since its commissioning, it has operating well, which further validates the reliability and practicality of the CLCC valve control system.