Small disturbance stability sensitivity analysis and application of power grid with photovoltaic based on branch mode energy
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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维普
