Hybrid power generation microgrid system applied to breeding farm

Abstract

The invention discloses a hybrid power generation microgrid system applied to a breeding farm. The hybrid power generation microgrid system comprises a photovoltaic power generation system arranged on the roof of a breeding plant, a biogas power generation system based on fermentation of breeding waste, a diesel power generation system operating in an island mode and an energy storage unit. The photovoltaic power generation system and the biogas power generation system are based on PQ control. The diesel power generation system and the energy storage unit are based on the constant frequency constant voltage control. The constant frequency constant voltage control and the PQ control of the distributed power source form a master-slave control mode when switching to the island state, thereby realizing smooth switching of the microgrid, overcoming the intermittency and randomness of the biogas and the light resources and enabling the microgrid to operate stably in the island state as a whole.

Description

technical field [0001] The invention relates to the technical field of micro-grids, in particular to a hybrid power generation micro-grid system applied to farms. Background technique [0002] With the implementation of the national rural revitalization strategy plan and the adjustment of the energy structure and other major trends of the times, promoting the development of the micro-grid field of the smart grid and improving the development and utilization of new energy in rural areas is an important direction and important content to promote the reform of energy production and utilization. In the Pearl River Delta region, three-dimensional farm farming models such as mulberry fish ponds account for the majority. Building a renewable energy power generation system according to local conditions is the best solution to solve the green and environmental protection of farmers' electricity consumption. [0003] When the micro-grid system constructed by various renewable energy p...

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Problems solved by technology

[0003] When the micro-grid system constructed by various renewable energy power generation systems is connected to the grid, especially when the micro-grid includes photovoltaic power generation systems and biogas power generation systems and other unstable power supplies, the micro-grid will trip and break due to PCC, etc. The reason is that the large power grid is out of operation, and each power generation system loses the frequency and voltage support of the power grid, resulting in a decline in power quality and a series of island effects such as affecting normal production and operation.

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