多发电机组的大型船舶电力系统保护协调配置方案研究

Protection Coordination Configuration of Large Ship Power Systems With Multiple Generators

多发电机组船舶电力系统具有运行方式多、短路电流变化范围大等特点,给各断路器的保护整定带来了困难。以某多发电机船舶电力系统为目标,在研究该系统发电机运行组合的基础上分析得出需要计算的短路电流情况,依据相应标准进行短路电流的理论计算,并通过Matlab仿真对理论计算结果的正确性进行验证。根据短路电流计算结果,应用三段式电流保护设计多机保护协调配置方案,将为多发电机系统的保护方案设计提供参考。

The characteristics such as large quantity of operation modes and wide variation range of short-circuit current inherent in ship power system with multiple generators will cause difficulties in setting the protection of breakers. A ship power system with multi-generators is taken as the object system, and the situations of short-circuit current that need to be calculated are analyzed based on the research of the combination operation modes of the generators of this system. The short-circuit currents are calculated according to the corresponding standard of which the theoretical accuracy is verified by Matlab simulation. Based on these works, a protection coordination configuration scheme based on three-section protection is designed. A reference for the design of protection scheme of ship power system with multiple generators is provided.