Grid-connected power control strategy of electric energy router for rail transit power distribution

Abstract

The invention provides a grid-connected power control strategy of an electric energy router for rail transit power distribution, and the method comprises the steps: firstly solving target smooth power under the maximum wind and light output according to a rear end point power smooth semi-compensation algorithm, and then solving an output power instruction corresponding to a wind and light distributed power supply; and finally, controlling the wind-solar distributed power supply to track the instruction power and stably outputting the instruction power, so that the grid-connected point power is smooth and fluctuation is reduced. According to the method, the back end point power smoothing semi-compensation algorithm with the sliding window length of 7 is adopted twice to smooth the grid-connected point power, after the algorithm is continuously applied twice, grid-connected point power smoothing can be well achieved, meanwhile, the distributed power supply can be fully utilized as much as possible, and the abandoned power quantity is reduced.

Description

technical field [0001] The invention belongs to the field of power electronic equipment control, and in particular relates to a grid-connected power control strategy of an electric energy router for rail transit power distribution. Background technique [0002] In terms of rail transportation, electrified railways have the advantages of low pollution, high efficiency, and high traction power. At the same time, electrified railways will continue to develop in the direction of "large-scale, high-speed, and high-density" in the future. However, it will be accompanied by a huge demand for electric power, so the application of new energy and clean energy will become a more feasible method to solve this problem. Through the integration of new energy power generation system and energy storage system through power electronic converter equipment, the construction of a new generation of electrified railway "network-source-storage-vehicle" integrated power supply system is the demand f...

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Problems solved by technology

However, the above methods all use battery energy storage devices to stabilize the fluctuations of wind and solar power sources through rapid charging and discharging of batteries. They do not take into account the high price of batteries, low safety, and the limitations of spontaneous combustion and explosion, and the long-term use of power routers at home. Working in the grid-connected state for a long time, the battery cannot play the role of uninterruptible power supply

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