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With the scale of small and medium hydropower increasing gradually, it is difficult to establish a detailed model because the parameters of each generating unit can barely be obtained. To build a dynamic equivalent model of the hydropower generator group, this paper presents an estimation-based equivalent method, which will keep the dynamic responses and the transient stability consistent before and...
This paper describes the development of a generic Danish distribution grid model for smart grid technology testing based on the Bornholm power system. The proposed approach uses a coherency based dynamic equivalent technique along with relation & participation factors, and is suitable for use with real time digital simulator (RTDS). In particular, the frequency dependent network equivalent (FDNE)...
The complexity of power systems continue to increase as load demands grow and new energy technologies emerge. Efficient methodologies and instrumentation are needed for real-time monitoring and control of power systems. Accurately tracking the state variables (rotor angle and speed) is necessary for monitoring system stability conditions and assessing the risks of large-scale system collapse. Previous...
We introduce a new microscopic model of the outages in transmission power grids. This model accounts for the automatic response of the grid to load fluctuations that take place on the scale of minutes, when the optimum power flow adjustments and load shedding controls are unavailable. We describe extreme events, initiated by load fluctuations, which cause cascading failures of loads, generators and...
Controlled separation of power systems is the last defense line against wide-area blackout. As a special protection scheme, the methodology of system splitting is a comprehensive decision making problem. This paper introduces a novel approach for separation of the integrated power systems into several stable islands. The proposed method combines both the dynamic and static characteristics of interconnected...
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