Calculation method for sensing overvoltage of power distributing line based on PSCAD (power systems computer aided design)/EMTDC (electromagnetic transients including DC)

The invention relates to a calculation method for sensing overvoltage of a power distributing line based on PSCAD (power systems computer aided design)/EMTDC (electromagnetic transients including DC). The method mainly comprises the following steps of establishing a PSCAD/EMTDC circuit model of a power line sensing in a thunderbolt, designing a sensing overvoltage calculation self-definition element, and enclosing the PSCAD/EMTDC circuit model of the power line sensing in the thunderbolt and the sensing overvoltage self-definition element into a model in the PSCAD/EMTDC of the power line sensing in the thunderbolt. By adopting the calculation method, the model is established to more simply and conveniently calculate the sensing overvoltage of the power distributing line, and the analysis is carried out on the sensing overvoltage. According to the calculation method, the defects of an inaccurate experience formula and a complicate figure calculation method are overcome, and the efficiency of analyzing the sensing overvoltage is improved.