A microgrid power control system and method based on power sponge technology

Abstract

The invention discloses a microgrid power control system based on a power sponge technique. The microgrid power control system comprises a power sponge, a DC voltage detection device, an AC current detection device, an AC voltage detection device and a control unit, wherein the power sponge is connected in series between an AC bus of a microgrid and an ordinary load; and the control unit is used for measuring an AC voltage u<s> and an AC current i<s> which are input to the AC bus of the microgrid through all detection devices, calculating to obtain a pulse width modulation signal, respectively corresponding to an AC three-phase, of the power sponge, and controlling an output voltage U1 applied to the ordinary load by the power sponge to stabilize power fluctuation in the microgrid so that an important load power is P<1ref> and the power stability of the importatnt load is ensured, and the signal is used for controlling an reactive current output from the power sponge to the ordinary load so that the voltage of the AC bus of the microgrid is U<ref>. The voltage stability of the AC bus in the microgrid is ensured. Accordingly, the invention also discloses a microgrid power control method.

Description

technical field [0001] The present invention relates to a microgrid power control system and method, in particular to a microgrid power control system and method based on electric sponge technology. Background technique [0002] Since the beginning of the 21st century, with the rapid development of the world economy, the demand for energy has continued to grow, and the supply of non-renewable energy such as coal, oil, and natural gas has continued to be tense worldwide, and mankind is facing a severe energy crisis. At the same time, the use of a large amount of fossil energy has led to increasingly serious environmental pollution problems. Extreme weather conditions and natural disasters caused by them continue to occur, and the living environment of human beings is seriously threatened. [0003] In addition, the current power system has developed into a large-scale interconnected network system of centralized power generation and long-distance high-voltage transmission. It...

AI Technical Summary

Problems solved by technology

However, the volatility of distributed power sources such as wind power, solar photovoltaic power generation and other renewable power sources will affect the safety and stability of the micro-grid, as well as the stable operation of important loads inside the micro-grid.

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