A Microgrid Voltage Control Method for Fuzzy Adaptive Operation of High Penetration Fans

Abstract

The invention relates to a micro-grid voltage control method for fuzzy self-adaptive operation of a high-permeability fan, which includes the following steps: 1) For a DC micro-grid system, determine the busbar voltage control method, that is, use load shedding control to reserve a spare capacity, and perform virtual Inertia control and droop control; 2) Define the inertial support benefit used to measure the size of the inertia, and improve the inertial support benefit S through the virtual inertia control variable of the fan; 3) Carry out the double-layer micro-grid voltage control under the fuzzy operation under the code control, the upper layer adopts Power-based distributed power generation coding, the dispatching scheme is determined according to the penetration rate of the fan and the energy storage battery, the lower layer takes the inertial support benefit S, voltage U and the load shedding level of the upper dispatching plan as inputs, and the virtual inertia control is determined through adaptive fuzzy control parameters and droop control coefficients. Compared with the prior art, the invention has the advantages of effectively responding to load disturbances, improving the voltage operation stability of the microgrid, and the like.

Description

technical field [0001] The invention relates to the field of doubly-fed fan control, in particular to a microgrid voltage control method for fuzzy self-adaptive operation of a high-permeability fan based on code regulation. Background technique [0002] The distributed power generation system based on microgrid can accommodate more wind turbine capacity and improve energy utilization efficiency. Most new energy distributed power generation devices, energy storage devices and more and more loads use direct current. Therefore, if the DC micro-grid architecture is adopted, the additional DC / AC conversion link can be omitted, and the structure is simple and the efficiency is higher. However, with the development of power electronics technology, the voltage level of the DC micro-grid has become flexible and controllable. Frequency conversion loads and DC precision loads are emerging one after another, and DC power supply has been widely used in the energy industry due to its uniq...

AI Technical Summary

Problems solved by technology

Virtual inertia control ensures that the transient process of power shortage has enough active power to resist the voltage drop, and maintains the stable operation of the DC microgrid voltage. The problem of insufficient coordination has not considered the relationship between the micro-source output, load demand and energy storage status in the DC micro-grid

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