Finite time consistency-based distributed coordination control method for island micro-grid

Abstract

The invention discloses a finite time consistency-based distributed coordination control method for an island micro-grid. The control method comprises the steps as follows: (10) primary droop control is carried out, namely when the micro-grid is in power disturbance, droop control-based distributed power generation units and energy storage automatically control a frequency and a voltage of an output end, adjust power output and maintain the power balance of the micro-grid; and (20) secondary distributed control is carried out, namely under a distributed control framework, active power frequency control and reactive voltage control are simultaneously carried out to achieve that various distributed units undertake power shortage of the micro-grid and distributed recovery of the frequency and the voltage according to the adjustable capacity. The control method achieves distributed secondary recovery of the frequency and the voltage by a finite time consistency method, ensures that the droop control-based distributed power generation units and energy storage undertake power shortage according to the power capacity, maintains the frequency and voltage stability of the micro-grid and improves the reliability and the robustness of micro-grid control.

Description

technical field [0001] The invention belongs to the field of operation control of micro-grids, and in particular relates to a distributed coordinated control method for island micro-grids based on finite time consistency. Background technique [0002] Energy is the basis and driving force for economic and social development. Over the past hundred years, the development of traditional energy sources, such as coal, oil, and natural gas, has brought about great progress in human society. However, with the continuous development of the world's industry and economy, the exhaustion of traditional energy reserves and the ecological and environmental problems associated with energy utilization have led scholars to gradually shift the perspective of energy development to renewable energy mainly based on scenery, in order to restore and establish ecological environment. A friendly living environment maintains the sustainable development of human society. [0003] At present, the use...

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Problems solved by technology

However, the centralized master-slave control is highly dependent on the central controller and has high requirements for the reliability of the communication lines. Once the central controller or communication lines fail, the microgrid may collapse, which will cause great harm to users. Economic loss, but also cause negative social effects

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