Study On Power Router Control For Future Energy Internet

To solve the crisis of fossil energy in the future and reduce the pollution for fossil consumption,so many countries make the important strategic decision to open up new energy and renewable energy which will gradually replace the traditional fossil fuels.However,the "environmentally sensitive" distributed new energy generation outputs intermittent and unstable power.And the traditional power grid cannot solve the problem of large-scale new energy access and consumption effectively.The energy Internet or the electric energy Internet provides a new idea for the control of new energy power generation.The power flow control and network optimization of the distribution network can be carried out effectively and conveniently according to the results of the routing results through the power router.When the internal energy balance,the power router transmits power through the converter connected to the network,so the performance of the port converter greatly affects the control performance of the power router.It is of great significance to study the converter model suitable for the power router port.Firstly,in order to control converters more effectively and coordinately and reduce the dependence on the reference voltage of the systems,a unified control model based on voltage phase angle control for the converter is presented.The converter is controlled to work as the voltage source,in which the output voltage amplitude of the converter is controlled so that the output power of the converter is no greater than its maximum power.At the same time,the phase angle of the converter voltage is also controlled for controlling the work mode of the converter.The converter works as the reference-voltage source when the fixed phase angle of the converter voltage is controlled.And the phase angle of the converter voltage may be controlled to follow the output power requirement,in which the work mode of the converter is the power tracking mode.Furthermore,the two working modes of the converter can be switched to each other smoothly,which results in the fact that the impact from the changing the working mode of the converter on the power system can be avoided.Then,the unified “voltage-power” control model is applied to the port converter control of the power router.The control strategy of the power router based on the unified control model is proposed,and the power flow routing control in the distribution network based on the power router is studied.The DC bus voltage of the power router is controlled through the DC-DC converter of the internal energy storage.The working state of each AC port converter of the power router depends on the network state and the power router settings.In addition,the choice of distribution network nodes to configure the power router is also one of the problems worth discussing for the power flow control of the complex AC distribution network.In order to solve the problem of the configuration of the number of power routers and the problem of the working state setting for the port converter of the power router,a configuration method of the distribution network with the power router is proposed.And the power flow control of the distribution network with the power router is realized.Finally,the converter model,the power router model and the isolated distribution network are built in the MATLAB / Simulink simulation software.The correctness of the unified “voltage-power” control model of the converter and the control strategy of the power router based on the model is verified.The validity of the proposed configuration method is verified by simulation.