Wind-solar-stored energy-firewood autonomous micro-grid group cross-domain collaboration energy dispatching and fitting method

Abstract

The invention discloses a wind-solar-stored energy-firewood autonomous micro-grid group cross-domain collaboration energy dispatching and fitting method. The wind-solar-stored energy-firewood autonomous micro-grid group cross-domain collaboration energy dispatching and fitting method includes that constructing a micro-grid topology matrix through reasonable matrix generating weights; confirming the optimal DG-CL and S-CL power supply correspondence through an improved MST algorithm so as to obtain a trunk; using an LMI algorithm to select NL, and adding the NL to the trunk in a leaf form so as to jointly generate a new autonomous micro-grid structure. The wind-solar-stored energy-firewood autonomous micro-grid group cross-domain collaboration energy dispatching and fitting method uses an IEEE33-bus network to supply a detailed algorithm description for a test system, and a series of experiments proves the effectiveness of the strategy for improving the overall electric power use ratio of the system and continuously and safely providing power for important load.

Description

technical field [0001] The invention relates to the field of distributed power generation and energy storage equipment of a microgrid system, in particular to an autonomous microgrid group cross-domain coordinated energy scheduling and adaptive optimization cooperative operation method including wind, solar, storage, and diesel power sources. Background technique [0002] With the maturity of the autonomous 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, and cannot fully meet The power consumption requirements of all power loads in the autonom...

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, and cannot fully meet The power consumption requirements of all power loads in the autonomous microgrid, and solar and wind power generation systems are more infiltrated into the autonomous microgrid 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 distributed power supply (DG) 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 cost of the autonomous microgrid system; on the other hand, when the DG power supply is insufficient, the load It is limited by the inability to obtain sufficient power supply, especially when the power supply of important loads (CL) in the system is insufficient, the losses caused by it will be more serious

Images