A method and system for urban rail power supply operation control based on bidirectional converter

Abstract

The present application provides an urban rail power supply operation control method and system based on a bidirectional converter device. The method includes respectively obtaining the power supply operation of each main substation, each traction station, and each step-down station of the urban rail traction power supply system at the current moment State information and the estimated operating load information of each train on the whole line at the next moment. According to the current power supply operating state information and the estimated operating load information of each train, the power flow calculation is performed to predict the power flow distribution of the power supply system at the next moment, so as to control the traction The operation of the bidirectional converters in each traction station of the power supply system at the next moment. The system includes a train operation monitoring system, each main substation, each traction station and each step-down station operation information collection module, each traction station control module, and a control unit responsible for information processing and output, etc. The application realizes the interaction between the operation of the train and the power supply system, thereby achieving the purpose of mutual optimization and improving the intelligence and energy saving of urban rail transit power supply.

Description

technical field [0001] The present application relates to the technical field of rail transit, in particular to a method and system for controlling urban rail power supply operation based on a bidirectional converter device. Background technique [0002] At present, urban rail transit traction power supply systems generally use diode-based 12 or 24-pulse rectifier units, which are characterized by low cost, strong overload capacity, and relatively mature technology. Problems such as control, regenerative braking energy utilization, and high rail potential have brought great troubles to operations. Therefore, how to solve these problems has become an urgent research topic. [0003] At present, the operation of trains and the traction power supply system in urban rail transit are independent. The trains run according to the plan of the operation diagram, while the power supply system needs to provide enough electric energy for the operation of the trains. From the point of v...

AI Technical Summary

Problems solved by technology

From the point of view of energy saving, most scholars' researches are mainly from the perspective of optimizing train operation to achieve the goal of energy saving. It is also accompanied by a large amount of energy loss, so only optimizing the train operation cannot fully solve the problem; from the perspective of regenerative braking energy utilization, on the one hand, most of the regenerative braking energy of the train will be absorbed by the adjacent traction train, However, the cross-interval transmission of energy will also aggravate the problem of rail potential. On the other hand, although energy storage or energy feedback devices are mainly installed on the traction grid side to absorb the regenerative braking energy of trains, the operating effect is different. The energy saving effect of the station also varies greatly

Images