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.
In this paper, a new approach based on dynamic relative gain is proposed for partitioning voltage control areas in bulk power systems. The critical nodes of voltage stability are determined using voltage stability index, “L index”. The cross relative gain between the critical nodes and other nodes are calculated based on the concept of dynamic transfer function (DTF) and dynamic cross relative gain...
This paper presents a general approach for coherency detection in bulk power systems using the projection pursuit (PP) theory. Supported by the concept of center of inertia (COI) in power systems, the PP theory is employed to model the wide-area coherency detection as an optimization problem. In the proposed method, the optimal projection direction in high dimensional orthogonal space is explored...
A Volt-VAR control (VVC) strategy by using voltage regulators and reactive power compensators in the modern distribution grid for renewable energy integration is presented in this paper. Currently, the VVC techniques are gaining renewed interest and attention due to the emergence of active distribution grid, which refers to the distribution grid with advanced capability of computation, control and...
This paper proposes a method for calculating and analyzing section thermal limits under the condition of the security “N-1” criterion and forms the security region in multi-dimensional space. By calculating each generator's power transfer distribution factor (PTDF) on section lines, using the DC load flow model, the sensitive generators to the section thermal limits can be identified. With sensitive...
An improved control approach for DFIG (doubly-fed induction generator) is proposed, in order to enhance the damping of power systems integrated with wind farms through long distance. Firstly, the impact of wind power on the power system oscillations is investigated. Secondly, a supplementary damping control system (SDCS) is proposed and is added to the conventional DFIG control loop to improve the...
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.