Direct-current micro-grid control system, control method, storage medium, equipment and application

Abstract

The invention belongs to the technical field of power distribution, and discloses a direct-current micro-grid control system, a control method, a storage medium, equipment and application. According to the method, after rectifiers are connected in parallel, power values transmitted by lines can present economically distributed rectifier parallel modules in the lines with different parameters; rectified output direct-current sides of frequency converters are connected in parallel to form a direct-current bus, and the direct-current bus is connected to a direct-current bus module of a photovoltaic and energy storage link; and the direct currents rectified and output by the frequency converters are output to a parallel inverter module at a load side in a parallel inversion manner. According to the invention, the voltage fluctuation of the direct-current side is reduced, the power supply reliability is improved, the power can be economically distributed in lines with different parameters, the economy of an oil well power supply system is improved, the unified formulation of a voltage sag and short-time interruption treatment scheme is facilitated, the problem of low voltage caused by a long line and a heavy load is solved, load reverse power generation and unified energy feedback of photovoltaic subunits are facilitated, and the system is suitable for oil well power supply systems, port ship crane systems and other scenes.

Description

technical field [0001] The invention belongs to the technical field of single-well inverters, and in particular relates to a DC microgrid control system, a control method, a storage medium, equipment and applications. Background technique [0002] At present, with the increasingly prominent energy crisis and environmental problems, renewable energy power generation technologies dominated by wind power and photovoltaic power generation are developing rapidly; oil fields, as developers of oil and gas resources, consume a large amount of electricity, heat, etc. Energy, in order to achieve energy saving, emission reduction, and comprehensive energy cost reduction, vigorously promoting well site photovoltaic power generation technology has become an effective way for the green development of oilfield enterprises. In order to meet the adjustment requirements of oil production process parameters, single well frequency converters are commonly used in oil field pumping units to drive...

AI Technical Summary

Problems solved by technology

[0005] (1) In the prior art, the lines are long and the load is heavy, resulting in low voltage, which is not conducive to the unified energy feeding of photovoltaic subunits

[0006] (2) In the prior art, the line is longer and the load is heavier, which leads to low voltage at the load end of the oil well, which reduces the economy of the oil well power supply system

[0007] The difficulty in solving the above problems and defects is: Co

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