Network security protection system of railway power supply system

The invention relates to a railway power supply system network safety protection system, and the system is arranged between a secondary network and a tertiary network of a railway power supply system and comprises a logic isolation module and a physical isolation module. The logic isolation module performs logic isolation on the safety areas; and the physical isolation module is used for physically isolating the safe area from the non-safe area. Connection of a second-level network and a third-level network of each traction substation of a railway can be protected online in real time, one device can achieve physical isolation and logic isolation of the network at the same time (traditional devices need a forward isolation device and a hardware firewall to achieve two functions), and the safety protection capacity of a railway power supply system is improved. 本发明涉及一种铁路供电系统网络安全防护系统，所述系统设置在铁路供电系统的二级网络和三级网络之间，包括逻辑隔离模块和物理隔离模块；逻辑隔离模块对安全区域和安全区域之间进行逻辑隔离；物理隔离模块对安全区域和非安全区域之间进行物理隔离。能实时在线防护铁路各牵引变电所二级网络与三级网络的连接，令一台设备能同时实现