Digital substations are mostly important in the future of the electric power industry which makes their testing a critical process to ensure the required reliability and security of the grid. The paper introduces the definition of a digital substation and efficient testing, as well as the requirements for isolation during testing. It later describes testing related features in IEC 61850 Edition...

In order to overcome the problem of flow collision of the integrative information transmission in the switched Ethernet for substation process-level (SESPL), this paper proposed a novel priority-based transfer scheme in the end-nodes based on the information model, in which different priorities are assigned according to different information types by using the user priority field defined in the...

Most critical infrastructure systems can be modeled as cyber-physical systems whose cyber components control the underlying physical components so as to optimize specified system objectives based on physical properties, physical constraints, and the current and estimated state of the system. Such systems usually require supports for security and performance guarantees: wrongly received or misse...

In order to solve the problems of the existing wide-area backup protection (WABP) algorithms, the paper proposes a novel WABP algorithm based on the distribution characteristics of fault component current and improved Dempster/Shafer (D-S) evidence theory. When a fault occurs, slave substations transmit to master station the amplitudes of fault component currents of transmission lines which are...

In substation automation system, the appropriate operation of protection, control and monitoring systems depends on connection network accuracy. One of the important topics in modern automation system is connection of primary equipment to automation system by serial network; this connection is named ‘process bus’. Generally the configuration of communication network is based on the required dat...

State recognition in disconnecting switches is important during substation automation. Here, an effective computer vision-based automatic detection and state recognition method for disconnecting switches is proposed. Taking advantage of some important prior knowledge about a disconnecting switch, the method is designed using two important features of the fixed-contact facet of such disconnectin...

The aim is to improve the monitoring and control of district heating systems through the use of agent technology. In order to increase the knowledge about the current and future state in a district heating system at the producer side, each substation is equipped with an agent that makes predictions of future consumption and monitors current consumption. The contributions to the consumers, will ...

As the 750kV substation has the characteristics like timing inconsistency, dual protection configuration and uncertain diagnosis result, a fault diagnosis method of substation with redundant protection configuration based on time sequence fuzzy Petri nets is proposed. In this method, redundant knowledge about fault component is represented by using two sets of protective information. On that ba...

We focus in this paper on the contribution of a subsystem to the environmental impact of a system. In this way we propose to explore some limits related to Life Cycle Assessment (LCA), in particular the consideration of the use phase specificities (for example lifetime, technology or energy mix). Two cases studies concerning AREVA T&D’s aluminium electrolysis conversion substations are proposed...