In order to analyze the influence of different photovoltaic access locations on the small distur-bance stability of the power system and avoid complex modeling,the network energy is used as the re-search method to map the influence of photovoltaic grid-connection on power system low-frequency oscilla-tion into the network,and the low-frequency oscillation characteristics of the power grid are characterized based on the mode energy characteristics of the key branches.Based on this,the key links of system oscil-lation in the scenario of system with multi-photovoltaic grid-connection are identified,and the state varia-bles strongly related to each photovoltaic in the network energy are further extracted to form the energy photovoltaic component.On this basis,according to the constructed mode energy-based photovoltaic sensitivi-ty indexes,the sensitivity indexes are sorted to obtain the influence of different photovoltaic access loca-tions on the key links of system oscillation,and the photovoltaic additional configuration strategy is pro-posed.Taking IEEE 3-machine 9-bus system and New England 10-machine 39-bus system as examples for simulation analysis,the feasibility of the proposed method is verified by small disturbance stability calcula-tion.
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