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.
This paper considers the use of hybrid simulation combining electromagnetic transients (EMT) simulation and transient stability (TSA) simulation to model large networks. By comparing with a full detailed EMT simulation, the paper shows that the hybrid approach gives more accurate results than TSA simulation alone, when power electronic equipment is included in the EMT part of the model. The paper...
This paper describes a procedure for developing and validating the dynamic models in electromagnetic and electromechanical simulation. The model development is achieved by using the trapezoidal integration and the hierarchical initialization. The black-box testing method is introduced to validate the accuracy of the developed models through several examples.
This paper presents an early warning and preventive control system for dynamic security, which has been used in several provincial power grids in China. The framework and the main modules of the proposed system are introduced. The system architecture is based on a Multi-agent system which is developed by our team. The modules like on-line contingency assessment, total transfer capacity evaluation,...
A transient stability on-line forecasting algorithm, based on PMU measurements and EMS models, is proposed in this paper. This algorithm makes full use of both fast speed of PMU measurements and detailed models of EMS, which could deal with the situations with single fault or cascading faults. Several main factors that affect the accuracy of the forecasting algorithm are studied, and a binary search...
The energy management system (EMS) is the core of an electric power control center (EPCC) to manage and control the power system in a secure and economical way. Because the power system nowadays is large and interconnected (in the space dimension), the operational state is continuously varying (in the time dimension), and the control objectives are numerous (in the dimension of objectives), an EMS...
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.