With the wide application of distributed PV systems
the problem of users' illegal capacity expansion is gradually highlighted
which poses a threat to the stable operation of the power grid. In order to effectively identify the expansion behavior of distributed PV users
a distributed PV violation expansion identification method based on LSTM-Transformer is proposed. The method firstly screens out the PV power plants that are consistent with the meteorological conditions of the benchmark power plants through time series numerical and morphological similarity preprocessing
then constructs the LSTM-Transformer model
and uses the preprocessed data for training and parameter optimization to predict the theoretical output power of PV power plants. By comparing the actual power generation with the predicted output of the model
Gaussian kernel function is used to calculate the illegal expansion index (EVI)
detecting the severity of illegal expansion of PV users through the size of EVI
and determining the time of illegal expansion of users through the time of EVI mutation. The effectiveness of the proposed method was verified based on the actual data of photovoltaic users.
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