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Electric power industries have expanded the automation of their networks in recent years to meet the growing demands for improvements in services. The introduction of the concept of Smart Grid, the increased availability of smart devices and improvements in telecommunications are key factors for that. Besides the benefits in control and management that this concept brings, there are some technical...
On the way to a totally integrated automation system not only functional process data are of importance. Nowa-days, where increasing the efficiency regarding resource consumption of buildings and production plants is a big topic, centralised access to data provided by Smart Me-ters plays a significant role. This work presents first steps towards the integration of M-Bus-based metering devices into...
Currently, there is few uniform modelling standardsfor virtual experiment (VE) systems of different disciplines. Thescalability and compatibility of existing systems are relativelypoor. The idea of Modelica provides a good opportunity for theunification of the modelling of multi-discipline VEs (MDVE).However, Modelica is an original multi-domain modellingmethod for scientific research, instead of...
This paper discussed the application of online monitoring system based on IEC61850 standard in the smart substation. Firstly, the functions and performance requirements of online monitoring system have been discussed, and the functional model and interface model of online monitoring based on IEC61850 have been established; Secondly, the application schema of online monitoring system has been designed...
In order to solve the problem of incompatibility among DTUs from different manufacturers, and to achieve good interoperability between the DTU and other IED equipments, IEC 61850 is adopted to establish DTU models. IEC 61850 standard, the international communication standard on substation automation system, is designed to unify the substation automation communication systems. Basing on IEC 61850,...
IT technology development led to introduce automation systems in the substation. But, it was difficult for IEDs to communicate each other because there were different protocols over 152 kinds. Therefore, IEC 61850 for the substation was standardized. It can be applied to dispersed power-based micro grid or smart grid. In this paper, we inform the case that we implemented a client conformance tool...
IEC61850, the international network communication standard for substation automation system(SAS), provides a means to implement the interoperability between intelligent electronic devices (IED) from different manufacturers and the systems seamless integration. The characteristics of the IEC61850 standard is analyzed, the applicability of the standard to the distribution network is fully considered,...
Research in transactions planning has recognized the evolvement of Web Services as an industry standard to implement transactional business processes. We proposed a data modeling and contracting framework for Web services and in this paper we are exploring how our framework can help formally verify data integrity properties in an ad-hoc transaction.
In distributed system, deadlock is a common phenomenon. If a transaction requires more than one resource for its task to be accomplished, such request is called an AND model request. In this paper we have proposed a method for elimination of AND model deadlocks in distributed system. A Multi Granular Locking (MGL) technique is proposed which locks the database at various granules. This technique is...
The achievement of highly efficient integration and compatibility of intelligent electronic device (IED) has always been the key issue of digital substation which conforms to IEC61850 protocol in communication standard. This paper studies on the information model and equipment test which have important influence on compatibility to the system integration, first of all, the composition of IEC61850...
There will be quite a large amount of smart meters used in AMI, which may be produced by many different manufacturers. Therefore, it's very important to maintain interoperability among different devices, and reduce or even avoid the overhead of protocol conversion. Using a general standard might be a very good way to accomplish interoperability. This paper attempts to use IEC 61850, which will be...
The testing of architectures is nowadays a critical issue for Substation Automation System world. Various aspects, related to the IEC61850 requirements, should be tested and checked in order to validate architecture. The first aspect consists in validating the conformity of the IEC61850 implementation inside devices according to the standards requirements. The second aspect consists in validating...
This paper investigates a logical level implementation of STPM, a Spatio-Temporal Process Model. STPM is novel designed process oriented architecture which has enormous capacities in modeling dynamic aspect of the spatio-temporal phenomena. This model highly correlates with concurrent processing and signal transmission by associating syntax and semantics of π-calculus. The logical modeling phase entirely...
Object-oriented programming is the most successful programming paradigm. Relational database management systems are the most successful data storage components. Despite their individual successes and their desirable tight binding, they rely on different points of view about data entailing difficulties on their integration. Some solutions have been proposed to overcome these difficulties, such as Embedded...
Simulation is an effective way to study P2P systems. But for the popular file sharing software eMule, there is no eMule simulator to date. In this paper, we release the first eMule simulator, which simulates the internal mechanisms of the eMule software, such as requesting source list from server, publishing shared file list to server, connecting to other clients and requesting for uploading, credit...
The Architecture Analysis and Design Language AADL allows one to model complete systems, but also to define specific extensions through property sets and library of models. Yet, it does not define an explicit mechanism to enforce some semantics or consistency checks to ensure property sets are correctly used. In this paper, we present REAL (Requirements and Enforcements Analysis Language) as an integrated...
The High Level Architecture (HLA) is the new generation architecture of the Distributed Interactive Simulation (DIS). Its purpose is to facilitate interoperability among simulations and promote reuse of simulations and their components. RTI software is the core to integrate and support the HLA simulations. It is important to emphasize the interoperability of the RTI software. The RTI is usually based...
It is difficult to build the simulate environment for researching on mobile computer environment, especially for MRTT simulate in mobile distributed environment., Usually Object Oriented Programming (OOP) or Multi-Thread technology maybe the first choice, but this paper will introduce a simulate method based on structured programming with VC6.0 which is turn out more efficiency. In this paper we introduce...
Communication gateways have an indispensable role in the architecture of distributed automation systems. Numerous communication gateways have been implemented to address particular devices, data exchange requirements, programming languages, and communication protocols, and further will have to be implemented in the future. Typically, these communication gateways have been implemented from scratch;...
Considering the problem of unified description of data modeling languages for computer network management, information specification ontology may be a prospective solution. However, basics of a unified mathematical theory are still lacking for ontology building. Delighted by the philosophical thinking of conceptual scheme for descriptive metaphysics, this paper tries to utilize formal concept analysis...
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