Research on the prediction model of temperature and humidity in the ring main unit based on nonlinear coupling method
The working environment of the ring main unit(RMU)in large solar photovoltaic power plants is complex and variable,faced with harsh environments such as temperature differences and humidity,it is extremely easy to cause operational failures of the ring grid cabinet,which seriously affects the safe and stable connection of solar photovoltaic to transmission lines.Based on the measured temperature and humidity data inside the RMU,utilizing the advantages of ARIMA and RBF model in linear and nonlinear data processing,a temperature and humidity prediction model with ARIMA-RBF weight combination is constructed to dynamically predict the temperature and humidity inside the RMU.The dynamic prediction of temperature and humidity in the actual loop cabinet of a photovoltaic power station is carried out.The prediction results show that,compared with the single model,the ARMI-RBF weight combination model has higher prediction accuracy and better stability.The combined model gives full play to the processing ability of a single model for different characteristics of data through appropriate weighting strategies,and can better evaluate the temperature and humidity state inside the RMU.It can provide a reference for the establishment of a more universal prediction model,and help to reduce the failure caused by long-term operation of the ring cabinet under ultra-mild and humid environment.
solar photovoltaicring main unittemperature and humiditynonlinear couplingweighted combination prediction model
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