Controlling method for reducing load shedding costs of island microgrid

Abstract

The invention discloses a controlling method for reducing load shedding costs of an island microgrid. The controlling method includes that (10) total power vacancy of the microgrid can be obtained, and when power vacant fault happens to the microgrid in an island mode, a multi-agent system monitors power disturbance of the whole microgrid to obtain the total power vacancy of the microgrid; (20) sharing of the total power vacancy can be achieved; (30) local load shedding costs and marginal costs are measured and calculated; (40) load shedding quantity of each load is measured and calculated, and distributed cost optimization of load shedding can be performed by means of an average unification algorism to obtain load shedding quantity of each load; (50) load shedding operation can be performed, distributed optimum load shedding of the island microgrid can be achieved, and the microgrid frequency can return to a rated value. The controlling method is a complete distributed controlling method, distributed sharing of overall information can be achieved, the costs and the marginal costs are considered, load shedding in accurate load shedding quantity can be preformed, and accurate load shedding cost optimization can be performed.

Description

technical field [0001] The invention belongs to the field of micro-grid operation control, and in particular relates to a control method for reducing the load shedding cost of an isolated island micro-grid. Background technique [0002] With the depletion of the earth's resources and people's attention to environmental issues, the access to renewable energy has attracted more and more attention from all over the world. Microgrid is an emerging energy transmission mode that increases the penetration rate of renewable energy and distributed energy in the energy supply system, and its components include different kinds of distributed energy, user terminals of various electrical loads and / or thermal loads, and Related monitoring and protection devices. [0003] The power supply inside the microgrid is mainly responsible for energy conversion by power electronic devices and provides necessary control; the microgrid is a single controlled unit compared to the external large power...

AI Technical Summary

Problems solved by technology

Therefore, sudden changes in power generation and load pose a challenge to the frequency stability of island-mode microgrids

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