Traction network bilateral power supply ride-through power utilization system and control method

Abstract

The invention provides a traction network bilateral power supply crossing power utilization system and a control method, and relates to the technical field of electrified railway power supply. Comprising a power conversion device BCSa and a controller CCa which are arranged in a substation TSa, and a power conversion device BCSb and a controller CCb which are arranged in a substation TSb, and a traction network OCS between the substation TSa and the substation TSb adopts bilateral power supply; the controller CCa is used for acquiring power information of a substation TSa in real time, and the controller CCb is used for acquiring power information of a substation TSb in real time; the controller CCa and the controller CCb perform information interaction on the OFL through an optical fiber, the controller CCa controls the power conversion device BCSa to utilize the crossing power according to an information interaction result, or the controller CCb controls the power conversion device BCSb to utilize the crossing power according to the information interaction result, so that the crossing power returned to a power grid meets a preset requirement.

Description

technical field [0001] The invention relates to the technical field of AC electrified railway traction power supply, in particular to a traction network bilateral power supply crossing power utilization system and a control method. Background technique [0002] The electric separation phase of the electrified railway is the weak link in the whole traction power supply system. The neutral section of the electric separation phase forms a dead zone, causing power supply interruption. However, the power failure distance is more than 500 meters, which seriously restricts the good operation of the train, and even causes the train to stop on a slope when going uphill. The bilateral power supply of the electrified railway can cancel the electric phase split where the partition is located, eliminate the powerless area here, ensure the uninterrupted power supply of the train, and eliminate the hidden danger of excessive phase split. Bilateral power supply has the advantages of high p...

AI Technical Summary

Problems solved by technology

Just because the bilateral power supply has changed the grid structure, two key technical issues need to be solved in the implementation of bilateral power supply: one is the relay protection problem of the power grid and the traction network, which requires a larger protection range for the relay protection, and has the ability to jump traction when the grid fails. The power grid can be used to block the transmission of the power flow, etc., which can be completely solved by the power grid equipped with transmission line protection and the traction network equipped with section protection. It is equivalent to the power generation of the traction substation. If the return is reversed, it will be treated as power generation and will be offset by the electricity consumption of another traction substation, so the user will have no economic loss. In this case, it is necessary to study how to reduce the power through the bilateral power supply, or how to use the power through the bilateral power supply to reduce the impact on the power grid and users and improve the efficiency of power consumption while giving full play to the advantages of bilateral power supply.

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