Analysis the Switch Protection of Cooling System Based on Convertor Valve in Nanqiao Convertor Station
In a conventional convertor station, the heat generated by the operating converter valve is usually taken away by the valve-water cooling system. The motor is the core equipment in this cooling system and the operational state of the motor has great influence on the valve. Therefore, setting motor＇s protection correctly is more important. In this paper, the author uses checking up and down matching condition of 380 V power source circuit breaker in Nanqiao convertor station as an example, to state the operating principle of the valve- water cooling system. Then, list the motor application in this cooling system, to clarity the rationality of the setting value on motor protection and, the last, propose a new project on how to improve the motor protection setting. In addition, this paper could be also a reference and example on the motor protection setting of the valve-water cooling system to other conventional convertor station.
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