The knowledge of ground return current in fault occurrence plays a key role in the dimensioning of the earthing grid of substations and of cable sealing end compounds, in the computation of rise of earth potential at substation sites and in electromagnetic interference (EMI) on neighbouring parallel metallic conductors (pipes, handrails, etc.). Moreover, the ground return current evaluation is ...

In order to expand the simulation scale of smart substation, a simulation model of the inlet-outlet line unit, as described by the 0/108 S conductance for multivalued coefficients pre-storage is presented in this paper. As a part of orders decomposition, the address conversion circuit for multivalued coefficients can reduce the computational burden of processing elements. For the convenience of...

Since a power supply substation of the magnetic levitation train system includes an inverter which is necessary to change the frequency of power, it has a different characteristic comparing to any other railway system. Nowadays, a study is undergoing to determine rating of facilities constituting a power supply system and modeling that system. This paper proposes an analysis model for the power...

This paper talks about the implementation of the IEC-61850 standard using a CORBA middleware as communication mechanism. This standard specifies communication mechanisms for automation systems in electric substations. CORBA-based implementations of control systems open new perspectives for advanced control, because they ease the development of new functionality and enhance evolvavility of appli...

In the Saudi Master Gas System Expansion project, portal frame of overhead line high-voltage substation was reformed. The safety and stability laying cable guaranteed through optimized design supporting structure production head. Good practical results have been obtained, construction quality period guaranteed. It provides a guiding operational statement for improved technology in substation.

This paper introduces the overseas smart substation technology scheme, describes communication network architecture and equipment redundancy configuration in typical test compares similarities differences between China’s technology. The distribution of measurement control functions substations that are different from designs explained detail. architectures illustrated. Finally, suggestions Smar...

United States agencies involved with national security are concerned about the vulnerability of the North American electric power grid to electronic intrusions, commonly known as cyber attacks. Several studies have identified changing socio-economic conditions that increase the probability of an electronic, computer-based attack being launched against a utility or substation, causing regional a...

In this paper, we present a model developed for Electric Power Management Systems (EPMS) and Supervisory Control and Data Acquisition (SCADA) systems that allows us to calculate device vulnerability and help power substation operators and administrators identify and harden those portions of the control system that are most vulnerable to cyber attack. We use graph theory to model electric power ...

ABSTACT This paper presents a new method for solving Substation Expansion Planning (SEP) problem using three basic algorithms in fuzzy clustering. Clustering algorithms are mainly associated with distance functions and measure dissimilarities of data set in different clusters. It is equivalent to measure similarities of data in a cluster. That is, a lot of varieties exist to find and create suc...

design and expansion of distribution systems seems inevitable in view of the need to satisfy the rise in energy consumption in a technical and economical way. optimal location, sizing and determining the service area of substations is one of the principle problems in expansion of distribution systems. also uncertainty is one of the important factors that increase risk of exact decision makings....