A capacity optimization configuration method for urban rail transit photovoltaic energy storage system

Abstract

The invention discloses a capacity optimization configuration method for urban rail transit photovoltaic energy storage systems. According to the operation characteristics of urban rail transit with large morning and evening peak loads, a time-sharing operation strategy is formulated to determine the operation of photovoltaics, energy storage and power grids in different periods status; study typical daily load curves and photovoltaic output curves for output adaptability analysis, integrate photovoltaic and energy storage time-sharing operation characteristics and output adaptability analysis, establish an optimization model with voltage fluctuation and economy as the objective function, and pass the weighted value The multi-objectives are converted into single-objective optimization functions by means of a single-objective optimization function, and the particle swarm optimization algorithm is used to solve the problem to obtain the optimal configuration of the energy storage capacity of the system. The invention is beneficial to promote the energy saving and emission reduction of the urban rail system and the consumption of local photovoltaics, and at the same time reduce the network voltage fluctuations to improve the power quality of the traction side, time-sharing operation and use of energy storage to cut peaks and valleys of photovoltaics and load peaks Improve system economy.

Description

technical field [0001] The invention belongs to the technical field of urban rail transit power supply systems, and in particular relates to a capacity optimization configuration method of an urban rail transit photovoltaic energy storage system. Background technique [0002] With the improvement of the national economic level and the acceleration of urbanization, urban rail transit has developed rapidly in large and medium-sized cities in China, ushering in a new period of comprehensive development. Under the traditional energy structure model, large-scale electricity consumption will bring huge energy consumption and make environmental pollution more serious, which will greatly affect the construction of urban environment and sustainable development. Therefore, the access of renewable energy such as solar energy and wind energy is of great significance to the green development of urban rail transit and energy conservation and emission reduction. [0003] At present, solar...

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Problems solved by technology

[0004] In recent years, many places have tried to install urban rail transit photovoltaic power generation systems. Although photovoltaic power generation technology has been greatly developed and improved compared with before, energy storage technology is still immature and the cost is high. There are few studies on the network, and there is no related research and application on the optimal allocation of urban rail photovoltaic-energy storage system capacity. It is very important for the energy storage capacity allocation of the new energy power supply system connected to the urban rail DC power supply system. The overall economic benefits and stable operation of the system can also maximize the consumption of renewable energy

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