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Energy systems are gaining more evolution upon the incoming boom of the distributed energy resources (DERs). In order to sustain an efficient electrical energy systems operation and reduce hazard for the Electrical Utilities personals within such dynamic and adaptable systems structure behavior that handle numerous parameters and variables. A new islanding detection technique is proposed. The proposed...
Frequency converters are used to control electric motors in many kinds of industrial applications. Since they control the electric motors that run the machines or processes, they must be strongly integrated with the rest of the automation system. If the wireless sensor and actuator networks are used as a part of the same automation system, it would be beneficial to have a direct connection between...
This paper discusses mainly the requirements of enhanced IEC 61850 security parameters for smart grid. Since IEC 61850 has been specified in 2003, smart grid was developed rapidly. This modern grid requires reliable, flexible, efficient and secured communication standards. Recent researches confirm that IEC 61850 meets the first three requirements, yet its security is still an issue due to certain...
The relative significance of available processing/memory resources and cost/power constraints for wireless sensor-actuator nodes depends on the application and use-case scenario. As an example, wireless automation applications usually have diverse processing/memory resource demands and energy constraints, and they bring forth development feasibility as one of the important decision criteria. For similar...
Cooperative transmission is one of the promising techniques in wireless communication systems that enables the cooperating node in a wireless sensor network to share their radio resources by employing a distributed transmission and processing operation. This technique offers significant diversity gains as several cooperating nodes forward source node's data to the destination node over independently...
IEC61850 standard provides new kind of solution and offers efficient performance within a substation automation system (SAS). This efficiency has been introduced by means of exchanging real-time information, reducing life-cycle costs and interoperability. Measuring the transferring messaging latency and interoperability testing within the Substation Automation System (SAS) are crucial tasks that require...
The growth of IEC61850-9-2 process bus as a high data rate communication network have a great improved the capability of substation automation system (SAS). This paper discuss a modelling concept of intelligent electronic devices (IED) using OPNET modeller simulation tool. Simulation tool provides a comprehensive development environment for the specification modelling, system simulation and also facilitate...
Communication system in computer network plays an important role and ubiquitous in the modern network that getting increasingly clear with applications of modern substation automation system (SAS), Distributed energy resources (DER), smart grid, among others. It is undergoing and different types of communication media and approaches have been implemented to meet the diverse needs of modern networks...
Reliability estimation of electricity generation, transmission and distribution plays an important role based on assessment of past performance and future predictions. There are two traditional basic approaches to estimate the reliability and probability of failure, one based on analytical calculation and the other based on stochastic simulation. This paper discusses about the estimation of system...
The traditional way to evaluate the system reliability or a probability of failure in the system is to use one of two basic approaches, direct analytical techniques or stochastic simulation. The emerging concept of Smart Grid requires advanced automation solutions for distributed electricity production and distribution. The automation system must fill the performance, availability and reliability...
Many operations, be they military, police, rescue, or other field operations, require localization services and online situation awareness to make them effective. Questions such as how many people are inside a building and their locations are essential. In this paper, an online localization and situation awareness system is presented, called Mobile Urban Situation Awareness System (MUSAS), for gathering...
Cooperative communications have been recommended to exploit the inherent spatial diversity gains in multiuser wireless systems without the need of multiple transceivers at each node. This is achieved when wireless nodes help to each other to send multiple independent transmission paths to the destination. The advantage of cooperation can be exploited significantly by allocating the power of the system...
In this paper, we study the maximum stable throughput region of the proposed systems using stochastic dominance technique for optimizing utilization of a cognitive shared channel. A cognitive protocol on the general multipacket reception channel model is adopted [1], [2], where the primary transmission may succeed even in the presence of secondary transmission. Thus the cognitive user can increase...
In this paper we propose a new power control scheme for cognitive radios, Distributed Power Control Algorithm for Cognitive Radios (DPCACR). As we know that in a cognitive system, the secondary users (SU) either transmit in an opportunistic way or coexist with the primary users to transmit simultaneously under the constraints that will not harm to the primary users. Previously, the interference temperature...
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