An optimal operation method for energy management of traction power supply system considering photovoltaic uncertainty

Abstract

The invention discloses a traction power supply system energy management optimization operation method considering photovoltaic uncertainty, comprising the following steps: Step 1: Obtain the load process data of the traction substation and the intraday photovoltaic output data curve in the area; Step 2: Establish the optimization The objective function of the model; Step 3: Establish the constraint conditions of the optimization model; Step 4: Establish a mixed integer linear programming model according to the information gap decision theory; Step 5: Solve the model obtained in Step 4 to obtain a mixture of robust decision-making and chance decision-making The optimal charging and discharging power of energy storage devices, the optimal grid-connected power of photovoltaics, the optimal power flow of back-to-back converters in power flow controllers, and the total operating cost of the system are to complete the optimal operation method of the traction power supply system considering the uncertainty of photovoltaics. The invention can effectively reduce the impact of photovoltaic randomness and uncertainty on the traction power supply system, improve the safety and stability of the system, reduce the electricity cost of electrified railways, and provide decision-making opinions for railway departments in uncertain scenarios.

Description

technical field [0001] The invention relates to an energy management optimization operation method of a traction power supply system considering photovoltaic uncertainty. Background technique [0002] The huge regenerative braking energy generated when a high-speed train starts and stops can be absorbed and reused by a hybrid energy storage device combining a battery and a supercapacitor. At the same time, high-speed railways often have abundant solar energy available. The introduction of photovoltaic power generation systems can effectively improve energy utilization, reduce carbon emissions of electrified railways, and improve the safety, stability, economy and environmental protection of traction power supply systems. [0003] In terms of safety, the rapid development of high-speed railways and heavy-duty railways has made the power quality problems of electrified railways, mainly negative sequence, increasingly significant. At the same time, there are a large number of ...

AI Technical Summary

Problems solved by technology

[0005] Photovoltaic output power and traction load have strong randomness and volatility, and the daily variation threshold fluctuates greatly, which will bring many adverse effects to the same-phase traction power supply system

For a single substation, large uncertainties may lead to overload operation of power flow controllers and traction transformers, threatening the safe and stable operation of trains; The interaction of electric energy among them will reduce the internal energy utilization efficiency, and even cause a wider range of unstable operation and cause economic losses.

Images