Refine
Year of publication
- 2018 (3) (remove)
Document Type
- Article (3) (remove)
Has Fulltext
- yes (3)
Is part of the Bibliography
- no (3)
Keywords
- Bildanalyse (1)
- Blindleistungsregelung (1)
- Computersicherheit (1)
- Dezentrale Elektrizitätserzeugung (1)
- Energiefluss (1)
- Herbarium (1)
- IT security (1)
- IT-Sicherheit (1)
- Intelligentes Stromnetz (1)
- Metadaten (1)
- Optische Zeichenerkennung (1)
- Organisatorische Aspekte (1)
- Produktion (1)
- Spannungsregelung (1)
- Vorgehensmodell (1)
- active distribution system (1)
- distributed generation (1)
- grid ancillary services (1)
- optimal power flow (1)
- organizational aspects (1)
- procedural model (1)
- reactive power control (1)
- smart grids (1)
- transmission system (1)
- voltage control (1)
- wind power grid integration (1)
Institute
- Fakultät I - Elektro- und Informationstechnik (3) (remove)
The growing importance of renewable generation connected to distribution grids requires an increased coordination between transmission system operators (TSOs) and distribution system operators (DSOs) for reactive power management. This work proposes a practical and effective interaction method based on sequential optimizations to evaluate the reactive flexibility potential of distribution networks and to dispatch them along with traditional synchronous generators, keeping to a minimum the information exchange. A modular optimal power flow (OPF) tool featuring multi-objective optimization is developed for this purpose. The proposed method is evaluated for a model of a real German 110 kV grid with 1.6 GW of installed wind power capacity and a reduced order model of the surrounding transmission system. Simulations show the benefit of involving wind farms in reactive power support reducing losses both at distribution and transmission level. Different types of setpoints are investigated, showing the feasibility for the DSO to fulfill also individual voltage and reactive power targets over multiple connection points. Finally, some suggestions are presented to achieve a fair coordination, combining both TSO and DSO requirements.
Organisation der IT-Sicherheit in der Produktion : in zehn Schritten zur sicheren Produktionsanlage
(2018)
Der folgende Beitrag befasst sich mit der IT-Sicherheit von Produktionsanlagen aus Betreibersicht. Hierbei liegt der Fokus auf den organisatorischen Aspekten der IT-Sicherheit. In einer Bestandsaufnahme werden zunächst die Probleme herausgearbeitet, die entstehen, sofern sich eine Organisation im Wesentlichen auf technische Aspekte der IT-Sicherheit konzentriert. Daraus wird die Notwendigkeit organisatorischer Maßnahmen abgeleitet. Eine Betrachtung von Normen und Standards, die sich mit den organisatorischen Aspekten der IT-Sicherheit in der Produktion befassen, liefert das Grundgerüst für die Ableitung eines Maßnahmenplans. Der daraus resultierende 10-Punkte-Plan zur Umsetzung der IT-Sicherheit in der Produktion schließt den Beitrag ab.
Toward a service-based workflow for automated information extraction from herbarium specimens
(2018)
Over the past years, herbarium collections worldwide have started to digitize millions of specimens on an industrial scale. Although the imaging costs are steadily falling, capturing the accompanying label information is still predominantly done manually and develops into the principal cost factor. In order to streamline the process of capturing herbarium specimen metadata, we specified a formal extensible workflow integrating a wide range of automated specimen image analysis services. We implemented the workflow on the basis of OpenRefine together with a plugin for handling service calls and responses. The evolving system presently covers the generation of optical character recognition (OCR) from specimen images, the identification of regions of interest in images and the extraction of meaningful information items from OCR. These implementations were developed as part of the Deutsche Forschungsgemeinschaft funded a standardised and optimised process for data acquisition from digital images of herbarium specimens (StanDAP-Herb) Project.