针对地铁供电系统中 3 种双向变流装置和整流机组配置方案，对比分析设备额定功率选择原则、协同控 制策略以及主变电所注入点谐波的影响。采用 1 套整流机组和 1 套双向变流装置方案时，建议采用双向变流装置 优先工作的控制策略，以减少 12 脉波整流带来的低次谐波影响。通过分析双向变流装置和二极管整流机组的短 路阻抗，总结交流侧和直流侧的短路保护配置特点，即交流侧保护可设置带低电压闭锁的过流保护提高灵敏度， 直流侧需要针对不同工况下的短路电流值进行保护校验，考虑功率双向流动。

This study compared and analyzed the selection principle of rated power of equipment, cooperative control strategies, and the harmonic influence of injection points at the main substation in accordance with three configuration schemes of bidirectional converters and rectifiers used in the metro power supply system. It is suggested that the bidirectional converter should work first to reduce the negative effect of low-order harmonics caused by the 12-pulse rectifier. This study summarized the configuration features of short-circuit protection on both the AC and DC sides. The low-voltage lockout can be set on the AC side to increase the sensitivity. The short-circuit value should be calculated to check the protection settings under different conditions, and the bidirectional power flow should be considered on the DC side.

U231.1