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This paper is the second of a two-part series on analog-digital power system state estimation. The minimum-information-loss (MIL) method that calculates an accurate real-time power system model from a set of analog and digital measurements is implemented, applied, and validated. Two MIL implementations are proposed for both power grid and substation state estimation. The performance of the MIL method...
Cascading failures present severe threats to power grid security, and thus vulnerability assessment of power grids is of significant importance. Focusing on analytic methods, this paper reviews the state of the art of vulnerability assessment methods in the context of cascading failures. These methods are based on steady-state power grid modeling or high-level probabilistic modeling. The impact of...
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...
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