Calculation of the Critical Energy of the Power System with Protection Operation
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Jikeng Lin
Whether a disturbance will trigger unexpected protection operation to exacerbate the normal operation state or even lead to the unstable state depends on the transient energy that the system gains during the fault period. The paper presents a new gradient projection approach to calculate the critical energy for transient stability assessment of the power system with the protection operation. The method takes the projection of the potential energy gradient on the key protection operation surface as search direction and iteratively searches for the critical energy at the surface; in order to let the optimal point be the feasible point, the generator angles are considered as control variables of power flow equation to solve network bus voltage and angle during the searching process. Examples show that the convergence and precision of the new method proposed is much better than that of other methods, which demonstrates the validity and feasibility of the new method.
©2011 Walter de Gruyter GmbH & Co. KG, Berlin/Boston
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Articles in the same Issue
- Article
- Reactive Power Optimization Based on Adaptive Immune Algorithm
- Calculation of the Critical Energy of the Power System with Protection Operation
- Advanced Analysis of Clustered Photovoltaic System's Performance Based on the Battery-Integrated Voltage Control Algorithm
- Comparative Study of LEO and GEO SSPS for Some Identified Sites in India
- Output Power Leveling of a Wind Generation System Using Inertia of a Wind Turbine
- Impact of Overspeed Protection Control on Stability for Islanded Power System
- Measurements and Simulations on ELF-EMF Magnetic Field Exposures from Multiple Electric Transmission Lines
- A Neural Approach to Evaluate the Effect of Lightning in Power Transformers
