电力二次系统运行的随机动态行为是不透明的且难以具象化描述，这显然不利于掌控新型电力系统对信息及通信技术强依赖所带来的不确定性。本文首次提出电力二次系统的稳态分析方法、静态安全分析方法和暂态分析方法。以功能描述复杂的智能变电站二次系统为研究对象，通过仿真技术开发，创建了集成于通用网络仿真软件的智能变电站二次系统仿真工具，保真模拟数字信息在二次系统中传递、流动和处理的全流程；再结合本文提出的设备级的仿真测试仪、系统级的路径追踪和时延刻录技术、场景级的动作特性展示技术与仿真加速技术，以智能变电站实际工程项目为案例，实现了网络传输稳态场景、元件（部分）失效场景、断路器失灵场景下的电力二次系统的稳态分析、静态安全分析和暂态分析。

The stochastic dynamic behavior of power secondary system is opaque and difficult to visualize, which obviously hinders to control the uncertainties brought by the strong dependence on information and communication technologies in new power systems. In this paper, the steady-state analysis method, static security analysis method, and transient analysis method for power secondary systems are first proposed. The smart substation secondary system with complex functional descriptions is taken as the research object. Through simulation technology development, a smart substation secondary system simulation tool integrated into general network simulation software has been created, which fidelity depicts the entire process of digital information transmission, flowing, and processing in the secondary system. By combining the proposed simulation tester at the device level, path tracking and delay recording technology at the system level, action characteristic display technology and simulation acceleration technology at the scenario level, and taking the actual engineering project as an example, the steady-state analysis, static security analysis, and transient analysis of the power secondary system under network transmission steady-state scenarios, secondary component (partial) failure scenarios, and circuit breaker failure scenarios have been achieved.