Wind-solar-storage-diesel autonomous micro-grid group cross-domain synergistic interaction and consumption method

Abstract

The invention discloses a wind-solar-storage-diesel autonomous micro-grid group cross-domain synergistic interaction and consumption method. The method constructs network topology matrix weights in consideration of multiples factors, and organically unifies the low-relevance metrics, thereby greatly reducing the number of constraints and laying the foundation for the simplification of an algorithm. The method combines an MST search algorithm and an LMI optimization algorithm to construct a new trunk and a new leaf under the micro-grid topology respectively, so as to not only utilize the advantages of the respective algorithms, but also facilitate the combination and the separation of the algorithms at any time, thereby avoiding re-operating the algorithm after each sampling, greatly reducing the calculation amount, improving the efficiency of the algorithms, and rationally arranging the charging and discharging state of an energy storage unit. Thus, the strategy can optimize and arrange the electric energy from space and time, so that the utilization rate of the electric energy is improved to a great extent.

Description

technical field [0001] The present invention relates to the field of distributed power generation and energy storage equipment of a microgrid system, in particular to a method for cross-domain coordinated energy scheduling and adaptive optimization cooperative operation of a microgrid group including wind, solar, storage, and diesel power sources. Background technique [0002] With the maturity of the micro-grid system, this kind of power network system that can operate independently or grid-connected has adopted more renewable energy technologies. However, although there are relatively stable and reliable power supply systems such as internal combustion generators and gas turbine generators among the currently commonly used distributed power sources, their scale and power supply will be limited to a certain extent because they need to consume traditional energy for power supply. To meet the electricity requirements of all electricity loads in the micro-grid, and solar and w...

AI Technical Summary

Problems solved by technology

However, although there are relatively stable and reliable power supply systems such as internal combustion generators and gas turbine generators among the currently commonly used distributed power sources, their scale and power supply will be limited to a certain extent because they need to consume traditional energy for power supply. It meets the power consumption requirements of all power loads in the micro-grid, and solar and wind power generation systems are more infiltrated into the micro-grid system because of their clean and renewable characteristics.

However, due to the influence of weather, environment and other factors, the latter has the characteristics of intermittent and fluctuating power supply, so it cannot provide continuous and stable power supply.

This will reduce the operating efficiency of the autonomous microgrid system from two aspects: on the one hand, when the DG power supply is sufficient, a large amount of electric energy will not be effectively utilized

Although the energy storage device can absorb part of the excess power at this time, its effect is limited and a large number of energy storage units are required, which greatly increases the investment and maintenance costs of the microgrid system; on the other hand, when the DG power supply is insufficient, the load cannot Restricted by sufficient power supply, especially when the CL power supply in the system is insufficient, the losses caused by it will be more serious

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