The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Domestic photovoltaic (PV) based microgrid refers to a distributed group of small solar PV systems installed at each household in a residential area. The distributed systems may be integrated to form a meshed microgrid structure which can operate in both islanded and grid-connected modes. Grid-connected microgrids of domestic solar PV systems can supplement energy needs of homeowners. They are a potentially...
This paper proposed a new power grid fault diagnosis model combining Petri nets and grid computing. It includes the power grid computing system's structure, software service and algorithm. The model can use the high performance computing method and distributed environment of grid computing. At the same time, Data grid system can offer table, efficient and unified information resources for the power...
The standard IEC 61850 contributes the manufacturers and the end users. But it also makes many obstacles to the modification of the conventional substation. This paper presents a scheme which modifies an in-service conventional substation gradually to a modern substation which conforms to IEC 61850 standards. The procedure of the modification is divided into three stages. During the first stage, all...
The project to install new cables in the Woodhead Tunnel forming part of National Grid's (NGET) 400kV transmission system running across the Pennines, requires a state of the art cable monitoring and protection system. The availability of IEC61850 offers the opportunity to provide a simple but effective system in an early long haul application.
This paper discusses real world examples of utility initiatives to address the issue of substation cyber security in the context of both industry best practices and the global standards organizations seeking to provide a blueprint for security implantation. The authors provide an overview of existing technologies for securing IP and Ethernet communications networks and end devices. One of the aspects...
In this paper the authors report current experience of IEC 61850 application in the Portuguese transmission system through the presentation of the Ermesinde case study. Adopted physical and logical architectures, function allocation, as well as engineering tools and processes are described and discussed. In the second part of the paper a future outlook for advanced transmission system automation is...
This paper provides an overview of recent developments in high availability networks and new redundancy protocols designed to guarantee seamless failover and proper functioning of the most critical substation automation applications such as tripping via GOOSE (Generic Object Oriented Substation Event) messages and IEC 61850 Process Bus based on switched Ethernet. The authors describe most common redundancy...
Transmission level protection functions are increasingly being looked at for Distribution systems. This can be attributed mainly to the enhancements being planned for by the Operating Companies, to increase the system efficiency, and also to ensure reliable power supply to the end Consumers. Slowly, the catch word "Smart Grid" is being consciously and progressively transformed to practical...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.