Direct-current microgrid power optimization configuration and operation method based on wave power generation

Abstract

The invention discloses a direct-current microgrid power optimization configuration and operation method based on wave power generation. A storage battery adopts variable power control for dividing aworking state of a wave power generation direct-current microgrid system into multiple working states, and based on a power difference of the wave power generation capacity and the load consumption, the directions and values of charging and discharging power in the storage battery are controlled, so that the wave power generation direct-current microgrid system is switched in the multiple states.The power optimization of the wave power generation direct-current microgrid system is divided into MPPT control and limited power control: when the wave power generation direct-current microgrid system works in the MPPT control, the wave power generation direct-current microgrid system tracks a maximum output power point of a wave power generation device in combination with a criss-cross algorithm; and when the wave power generation direct-current microgrid system is in the limited power control, the wave power generation direct-current microgrid system is used for controlling output power ofthe wave power generation device in combination with the criss-cross algorithm. According to the method, the output power can maintain stable operation of the wave power generation direct-current microgrid system.

Description

technical field [0001] The invention relates to the technical field of power control of wave power generation devices, in particular to a method for optimal configuration and operation of DC micro-grid power based on wave power generation. Background technique [0002] With the rapid development of my country's island construction, the island's demand for energy continues to increase. Wave energy is a clean and renewable energy with great potential. Data show that rational development and utilization of wave energy can meet about 10% of the world's current total electricity demand, which is equivalent to the total actual power generation of large hydropower stations around the world. [0003] The current control method of DC microgrid system for wave power generation mainly adopts voltage layered control, but this kind of control method scheme will cause frequent switching of control strategies due to bus voltage fluctuations. [0004] For the power control of DC micro-grid...

AI Technical Summary

Problems solved by technology

[0003] The current control method of DC microgrid system for wave power generation mainly adopts voltage layered control, but this kind of control method scheme will cause frequent switching of control strategies due to bus voltage fluctuations.

[0004] For the power control of DC micro-grid systems with wave power generation, swarm intelligence optimization algorithms have been widely used in MPPT (Maximum Power Point Tracking, MPPT) in the fields of photovoltaic power generation and wind power generation. When solving complex optimization problems, its convergence speed is slow and it is easy to fall into local optimum, which limits the improvement of power control performance of wave power DC microgrid system

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