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The stability and reliability of electrical power grids are indispensable to the continuous operation of modern cities and critical for preparedness, response, recovery and mitigation in emergence management. Because present power grids in China are often running near their critical operation points, they are especially vulnerable and sensitive to external disturbances such as hurricanes, earthquakes...
To construct the largest power simulation model with real time digital simulators (RTDS), assignment of the computing resource is an important issue to make the model feasible. For automatic computing resource assignments, the interesting idea of subgraph isomorphism is proposed. Computing units (racks) are connected with communication wires, whereas the power grid is connected with electrical lines...
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...
The mechanism of UHVDC Emergency DC Power Support (EDCPS) to enhance transient stability of multi- machine system is analyzed briefly based on EEAC (Extended Equal Area Criteria), and the influence of load model characteristic including ZIP static load model and IM (Induction Motor) model on UHVDC EDCPS effect after heavy disturbance is further studied, and the corresponding UHVDC EDCPS Strategies...
The Nanpsilaao Island wind farm in Shantou power grid is taken as the object for study. First, using the actual data of the power grid and wind farm provided by Shantou power grid, with the help of the simulation and calculation tools of the PSCAD/EMTDC and MATLAB, the voltage deviation, voltage fluctuation, flicker severity, harmonics, three-phase imbalance degree are calculated based on the IEC...
Supply support in receiver system can improve the stability of the system, especial voltage stability. As the receiver system in the China Southern power grid (the CSG), Guangdong Province's load is 70% of the CSG. The voltage support should be applied to improve stability. In this paper, many operation schemes are simulated. Weak nodes are shown by the voltage sensitivity index which is affected...
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