Train diagram-based traction load modeling method

Abstract

The invention discloses a train diagram-based traction load modeling method. The modeling method comprises the following steps of: obtaining train number of each power supply arm in each time interval of a running period according to a train diagram, equalizing each train on one power supply arm to an induction motor, equalizing each traction load to a parallel model of multiple induction motor models and static index models, performing parameter identification on a traction load model by using particle swarm optimization (PSO) according to the measured voltage and power waveform, and establishing the traction load model. Compared with the conventional traction load modeling method, the train diagram-based traction load modeling method has the advantages that: the influence of running time variance of a train on the traction load voltage and power is taken into consideration, the generality and the accuracy of the traction load model are greatly improved on the premise of keeping good astringency, the established traction load model is more accordant with the actual conditions, and the requirements of railway / power related departments on traction power supply quality assessment, electrical energy quality assessment and power system stability assessment are met.

Description

technical field [0001] The invention belongs to the field of power system operation, simulation and power system stability analysis, and in particular relates to a traction load modeling method based on a train operation diagram. Background technique [0002] In recent years, my country's high-speed railway industry has developed rapidly. The high-speed railway traction power supply load has the characteristics of strong impact and rich high-order harmonics. Accurately describe its power comprehensive load characteristics, seek a reasonable load model structure and obtain an accurate model Parameters, the establishment of traction load models for power system operation, simulation and stability analysis has become a research hotspot in academia and engineering. [0003] At present, the widely used method in the field of traction load modeling is to establish a Matlab / simulink simulation model for a power supply arm of the traction network. By building detailed electromagnetic...

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Problems solved by technology

This method has the following disadvantages: (1) The calculation amount of time-domain simulation is relatively large, and it needs a long calculation time; (2) The time-domain simulation is not combined with the train diagram, and the model obtained by the simulation is not universal; ( 3) The different power supply arms of the traction network are not completely electrically insulated, and there is mutual influence; (4) The traction power supply system and the locomotive traction drive system are analyzed as two independent parts, and the influence of the traction network voltage on the current is not considered, so that the power The injected current of the locomotive has a large deviation from the actual value; (5) The influence of the power system on the voltage amplitude and phase angle of the secondary side of the traction transformer is ignored, making the analysis results incompletely correct

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