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Renewable energy integration with the power systems will change the power systems in many ways. Renewable resources in remote areas will trigger extensive transmission upgrades to deliver green energy to the load centers. The intermittent and non-dispatchable characteristics of the renewable resources will impact both long-term system adequacy and real-time system security. Uncertainty of the development...
In order to prevent any accident from happening, a safety assessment modeling approach combined with analytical hierarchy process (AHP), signed directed graph (SDG) and hazard and operability (HAZOP) is proposed for thermal power plants in this paper. AHP is used to divide the production equipments for thermal power plants into several hierarchies and it can simplify the modeling difficulties by using...
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...
This paper proposes a new method for transient stability analysis in terms of measuring critical clearing time using grid-computing technology. Grid computing is a highly developed system for jointly solving collaborative complex problems; those are required to solve in limited time and therefore they need high performance computing. Probabilistic transient stability analysis is one such application,...
Development for a static voltage security assessment software package entitled power system voltage stability region (PSVSR) is presented in this paper. A novel power system stability analysis method named "security region" is utilized to develop this comprehensive software package. PSVSR has been implemented in standard C++ on Windows environment. It is constructed with three layers: user...
Dynamic security region (DSR) gives system engineers systematic and global information about the feasible operation region in power injection space. This paper is a result of an investigation into the use of DSR concept and its effective application in power systems. It particularly concerns with developing a software-based tool for the dynamic security assessment in the online operation environment...
In our previous studies, it has been demonstrated that the boundary of transient stability can be approximated by hyper planes (HPs) in power injection space over quite large range. In this paper, an effective method to compute such HP of large scale power systems is proposed. Based on coherence identification of generators for a given fault, the proposed method first reduces the original system to...
This paper proposes to display the boundary of static voltage stability region (SVSR) in cut-set complex power space for large electrical power systems. Active and reactive power flows on the branches in the critical cut-set are utilized to construct cut-set complex power space. We discovered that the boundary of SVSR can be approximated by hyper-planes in cutset complex power space. The paper summarizes...
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