| Because the demand of environment and energy cannot be satisfied by separated energy network.Energy internet is proposed.The combination of different energy networks is getting closer.this make the whole network is more complex.As an important part of energy internet,energy hub have the ability to converse and store.This essay analyzing the model of energy hub in energy internet.A new mathematical model of energy hub is proposed,and the optimal operation of multi energy hub is discussed in this essay.The specific research contents are as follows:1.The feature of energy hub in energy internet is analyzed.Based on this analyzation,the energy hub model contained electricity,nature gas and heating is proposed.According to analyze the energy hub optimal operation model and the objective function,an optimal operation method without price forecasting is given.2.According to the function of storage in energy,the defect of traditional energy hub mathematical model is mentioned.The new mathematical model of energy hub is proposed based on traditional model.The new model solve the problem that storages cannot be enough said and improved the utilize of storages.3.The energy internet optimal power flow based on the new energy hub model is analyzed.In order to solve this problem,the electricity network,heating network and nature gas network model of energy internet is given and the virtual energy hub concept is proposed to solve the energy internet optimal power flow problem.4.According to the multi-energy network model,the droop control of electricity and heating are proposed.Combined this two kind droop control,the multi-energy droop control method based on three-dimensional reference system is given. |
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