Energy Internet system for energy storage train charging station

Abstract

The invention provides an energy Internet system for an energy storage train charging station, which comprises an energy router, wherein the energy router is connected to a high-voltage DC bus used for charging an energy storage train and a low-voltage DC bus used for connecting a low-voltage DC power supply; and the energy router controls the electric energy of the low-voltage DC power supply to flow to the energy storage train. The energy Internet system can reduce the impact of the energy storage train on the power grid, and also can make full use power generation resources such as wind power and solar energy at the same time. The system connects the power generation resources such as wind power and photovoltaic power to a power supply system of the energy storage train charging station and realizes accurate control on the power flow by using the energy router, thereby smoothing the load fluctuation of the energy storage train during charging and reducing the impact on the power grid on the one hand, and making full use distributed renewable energy and saving the electric energy at the same time.

Description

technical field [0001] The invention relates to the technical field of power grids, in particular to an energy internet system used for charging stations of energy storage trains. Background technique [0002] The energy storage train is a kind of energy storage rail transit vehicle dedicated to traction. The train uses the on-board energy storage device for power supply, which can provide power for other trains that cannot obtain power from the power supply line, and pull them out of the power-off area. In some lines that include tunnels in the Midwest, since power supply lines cannot be installed in the tunnels, internal combustion locomotives or energy storage trains must be used for temporary traction when passing through the tunnels. Diesel locomotives emit carbon dioxide and toxic gases, which are not only harmful to the environment, but also harmful to people when running in long tunnels, while energy storage trains are driven by electricity, which is safe and environ...

AI Technical Summary

Problems solved by technology

[0003] Due to the long working hours, heavy loads and frequent working times of this type of energy storage train, it needs a high-voltage and high-current fast charging mode to meet its working characteristics when charging. load shock

In addition, in some special cases, such as the charging station is too far away from the railway, or in the middle of multiple tunnels, there will be situations where the charging station of the energy storage train cannot be connected to the power grid

These issues limit the widespread use of energy storage trains

[0004] On the other hand, there are abundant wind and solar resources in the Midwest, but due to the insufficient capacity of transmission lines and the uncontrollability of these renewable resources, they cannot be used for long-distance transmission, and the location does not have enough load to carry out Consumption, there are phenomena such as abandoning wind and light (electric energy cannot be used, resulting in wind power and photovoltaic generators not being able to generate electricity at full load, resulting in energy waste), and energy is wasted in vain

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