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Previous work has proven that transient characteristics of a grounding grid was far more different than its performance at power frequency because of the inductance of the system and the soil ionization phenomena. In this paper, a test on a grounding grid of a 110 kV substation was conducted. Several parameters, such as waveform, peak value and injecting point of lightning, were altered to study their...
Transient stability constrained optimal power flow (TSCOPF) is a challenging problem of power system. In this paper, TSCOPF is decomposed into three sub-problems, namely transient stability assessment (TSA), the stability constraint constructing and simple TSCOPF. They are solved iteratively to achieve the optimal operation point. In the TSA sub-problem, each contingency is simulated and the stability...
In this paper, by the use of a numerical method based on moment method, the earth permittivity influence on the performance of grounding grids at high frequency and transient is researched. Concept of complex resistivity is used to take account of the influence from both the earth permittivity and the earth resistivity.
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