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.
One of the main problems in the power system sector in emerging countries is lack of public data and information about transmission and distribution grids: quite often, the only source is limited to the map of the network and general information on the voltage profile and power flows in the lines. Hence, it is currently hardly impossible to perform further network analysis. To overcome this, the paper...
The integration of a European Electricity Market has leaded to one single market with multi-area which are considered as bidding zones; currently, it regards only the day-ahead market. The Price Coupling of Regions (PCR) project is an initiative for the day ahead market of seven power exchanges APX, Belpex, EPEX SPOT, GME, Nord Pool Spot, OMIE, and OTE. The Italian Power Exchange (GME) has become...
The paper presents the current state of art of a smart Distribution Management System (DMS) environment based on the evolution of a traditional Supervision Control and Data Acquisition (SCADA) system and the integration with a Network Calculation Algorithm System (NCAS). The tool is designed to perform a sensible management, on-line and off-line, of a distribution system with a high penetration of...
The integration of large amounts of Renewable Energy Sources (RES) is a great challenge for the operation of current power systems. In the Italian HV distribution system the main threat to security is caused by congestions that are likely to result in significant RES curtailment. This paper proposes an automatic procedure to be implemented in the Substations Automation Systems (SASs) to locally define...
The rapid spread of the Dispersed Generation (DG) in Distribution Networks (DNs) pushes the Distribution Company to actively manage and control the DN. In order to make this possible, a thorough knowledge of the system state is mandatory and the well-known state estimation techniques used by Transmission System Operators (TSOs) could be applied, but the DNs lack of redundancy due to very limited number...
The paper addresses the problem of observability in poorly measured distribution networks (DNs). In the lack of redundancy and statistical information about the measurements an innovative approach is proposed: it consists in minimizing the sum of the squares of the differences between measured and estimated values of the quantities provided by the measurement equipment present in the system. The proposed...
Nowadays, the penetration of Renewable Energy Sources (RES) in electrical networks is growing significantly. In spite of many problems it introduces, the connection of RES in the subtransmission systems also gives the opportunity of exploiting them for the benefit of the network. In this paper, this is done for islanding conditions and a Genetic Algorithm (GA) based procedure to make a stable islanded...
The development of the Dispersed Generation (DG) in Distribution Networks (DN) requires new planning and operational tools. The Distribution Company takes the role of the Distribution System Operator (DSO) that has to manage the network from many points of view; in particular, DSOs need advanced tools to manage DNs with respect to security, reliability and quality constraints, and to improve the Hosting...
The Hierarchical Voltage Regulation (HVR) is an efficient alternative to the traditional solutions used in the power system voltage control. It consists of three levels: primary, secondary and tertiary, among which the Secondary Voltage Regulation (SVR) level is the core of the HVR ensuring the coordination of a network area reactive power resources by controlling the voltage of the pilot bus, the...
Wind power is a rising renewable resource in the energy portfolio worldwide. A huge research effort has been applied for the efficiency of the wind turbines, i.e. for the real power injections maximization; on the other hand, reactive resources exploitation still need a deep investigation. This paper presents the results of a research project jointly carried out by SIEMENS and the Politecnico di Milano...
The large amounts of power transfers consequent to the liberalization of energy markets has raised, among others, two issues: (i) transmission line congestions and (ii) low-damped inter-area oscillations. The method proposed in this paper simultaneously solves both problems by installing FACTS devices like TCSCs and SVCs in key points of the power system. In particular, TCSCs can eliminate the congestions...
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.