Traction power supply system energy management optimization method integrating hybrid energy storage and photovoltaic devices

Abstract

The invention discloses a traction power supply system energy management optimization method integrating hybrid energy storage and photovoltaic devices. The traction power supply system energy management optimization method comprises the steps of: step 1, acquiring traction substation load process data and a typical light intensity scene; step 2, establishing an objective function of an optimization model; step 3, establishing constraint conditions of the optimization model, and linearizing the constraint conditions of optimization model; step 4, establishing a hybrid integer linear programming model according to the objective function obtained in the step 2 and the constraint conditions obtained in the step 3; step 5, and solving the hybrid integer linear programming model obtained in thestep 4, so as to obtain the optimal charge and discharge power of the hybrid energy storage device, the optimal photovoltaic grid-connected power and the optimal power flow power of a back-to-back converter in a power flow controller, thereby completing the energy management optimization of a traction power supply system. The traction power supply system energy management optimization method improves the photovoltaic permeability and train regenerative braking energy utilization rate, reduces the electricity cost of electrified railways, and is closer to the reality.

Description

technical field [0001] The invention relates to an energy management optimization method for a traction power supply system integrating hybrid energy storage and photovoltaic devices. Background technique [0002] In order to reduce carbon emissions and promote green and sustainable development, my country has also joined the ranks of countries that reduce greenhouse gas emissions; in the field of rail transit, electrified railways, as a large energy consumer, have also begun to take measures to achieve energy conservation and emission reduction; considering the huge regeneration of high-speed trains Braking energy can be absorbed and reused by introducing a hybrid energy storage device combining batteries and supercapacitors into the railway system to realize the regenerative braking energy of trains. In addition, my country's renewable energy power generation has developed rapidly in recent years. However, in areas rich in wind and light resources along electrified railways...

AI Technical Summary

Problems solved by technology

In addition, due to the unbalanced traction load of electrified railways, the power quality problem of the three-phase voltage imbalance in the existing power supply mode has become a prominent "bottleneck" that restricts the safe, reliable and efficient operation of the system

However, the existing traction power supply system does not have the ability to actively control and adjust the impact load, and the utilization efficiency of power supply resources and the ability to control the power quality mainly based on three-phase voltage unbalance need to be improved.

Images