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An on-line forecasting algorithm for transient stability of power systems, based on real-time measured fault impedance and EMS, is put forward in this paper. The proposed algorithm combines PMU measurements and EMS models organically. Models, initial states and fault information are three basic aspects of time-domain simulation for transient stability. Once a fault occurs, models and initial states...
In order to meet the requirements of some important field site applications, IEC61970 Common Information Model (CIM) standard has been extended in China, such as extensions of external network equivalent model and HVDC model. The extended CIM has been applied in many Chinese Electrical Power Control Centers (EPCCs) successfully. As an example of integration of applications developed by different vendors...
In order to find hidden cascading outage caused by protective relays, methods for modeling, simulating and online setting-checking of protective relays are studied here. A user-defined model is proposed based on a kind of scrip language and concept of component firstly. Based on that, the power system simulator in a commercial dispatcher training simulator is embedded with protective relay simulator,...
Energy management systems (EMSs) suffer from poor external modeling during wide area event occurring in interconnected power systems. In order to improve this situation, an IEC61970 standard based hierarchical network remodeling system for electrical power control centers is designed in China. In this designed system, through a wide-area communication network, each underlying control center automatically...
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...
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