Photovoltaic and micro gas turbine mixed micro grid coordinated operation control method

Abstract

The invention discloses a photovoltaic and micro gas turbine mixed micro grid coordinated operation control method. According to the frequency characteristics of photovoltaic and load power, a frequency conversion long-time series method is put forward to predict the photovoltaic and load power so as to adjust the previous output of power of a micro gas turbine. During the synchronous operation of a mixed micro grid, by using the controllable smooth photovoltaic power fluctuation of the micro gas turbine, the mixed micro grid becomes a schedulable power source; and during island operation, a prediction algorithm is added in the power control of the micro gas turbine, and the output of the micro gas turbine is previously scheduled, so that the difference of the photovoltaic and load power is commonly compensated by the micro gas turbine and an energy storage battery, thereby realizing the stable operation of the mixed micro grid. According to the invention, the fluctuation of a photovoltaic generation system can be decreased, and the problems of slow dynamic response speed and delay of the micro gas turbine can be overcome, so that the coordinated operation control of the mixed micro grid under synchronous and island states can be realized.

Description

technical field [0001] The invention relates to a micro-grid grid-connected coordinated operation control technology, in particular to a photovoltaic and micro gas turbine mixed micro-grid coordinated operation control method, which belongs to the technical field of power grid control. Background technique [0002] With the increasingly serious energy crisis and environmental pollution, microgrid technology has become a research hotspot as a feasible solution. Photovoltaic micro-sources have become one of the most potential renewable energy sources due to their rich resources, wide distribution, and cleanliness. Due to the obvious intermittent nature of photovoltaic power generation, the output power is greatly affected by weather changes. Adding controllable micro-sources or distributed energy storage to complement photovoltaic power generation to form a hybrid microgrid can improve the reliability of photovoltaic power generation. Among controllable micro-sources, micro g...

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Problems solved by technology

[0012] Aiming at the shortcomings of photovoltaic power generation system output fluctuations and micro gas turbine dynamic response speed and time delay existing in the prior art, the purpose of the present invention is to provide a new photovoltaic and micro gas turbine hybrid microgrid coordinated operation control system method to reduce The fluctuation of the output of the small photovoltaic power generation system and the problem of slow dynamic response and delay of the micro gas turbine can be overcome, and the coordinated operation control of the hybrid micro-grid in the grid-connected and isolated state can be realized

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