Multi-energy complementary micro-grid online type supporting inverter

Abstract

The invention discloses a multi-energy complementary micro-grid online type supporting inverter. The multi-energy complementary micro-grid online type supporting inverter comprises a convergence control unit, a coordinating control unit, an inversion unit and a grid-connected switching unit, wherein the coordinating control unit comprises a central processing unit, a local communication module, a remote communication module and a second power supply module used for providing power supply for the coordinating control unit, and the central processing unit is used for receiving external instructions, generates corresponding voltage regulation instructions, corresponding work instructions and corresponding grid-connected or off-network or online work instructions with obtained related information, transmits the corresponding voltage regulation instructions to a control module through the local communication module, transmits the corresponding work instructions to the inversion unit through the local communication module, and transmits the corresponding grid-connected or off-grid or online work instructions to the grid-connected switching unit through the local communication module. The multi-energy complementary micro-grid online type supporting inverter can be connected to multiple kinds of energy for electricity generation, and can achieve smooth and seamless switchover between a grid-connected mode and an off-grid mode to meet the load requirement for uninterruptible power supply. Besides, according to different work modes, the multi-energy complementary micro-grid online type supporting inverter can reasonably optimize the output ratio of the multiple kinds of energy to improve the utilization rate of renewable energy sources.

Description

Technical field [0001] The invention relates to a multi-energy complementary micro-grid on-line support inverter, which belongs to the field of power electronics, and can be applied to the micro-grid to realize seamless switching between the micro-grid on-grid and off-grid. Background technique [0002] At present, with the gradual depletion of conventional energy sources and increasing environmental pollution, countries all over the world are strengthening the development and utilization of clean and efficient renewable energy sources to solve energy problems in future social and economic development. Microgrid provides an important form of network organization for grid connection of distributed power generation (including renewable energy). Microgrid is essentially a small power system that includes distributed power, local loads, energy storage devices and traditional power grids. in parallel. When switching between on-grid and off-grid in a microgrid, due to the switching o...

AI Technical Summary

Problems solved by technology

In these occasions, the renewable energy must be connected in the form of a slave before it can be used. For a low-power microgrid, such a structure not only makes the system control complicated, but also greatly increases the cost

Images