Monitoring method of wind, photovoltaic and storage-integrated micro-grid capable of being operated in a grid-connected manner

Abstract

A monitoring method of a wind, photovoltaic and storage-integrated micro-grid capable of being operated in a grid-connected manner has the advantages that the monitoring method can predict the power generation power of wind-photovoltaic power generation equipment in a micro-grid and the load change in the micro-grid, track grid connection point voltage information of large power grids, acquire large power grid scheduling instructions in real time, detect storage battery module battery capacity in real time, set energy accumulation system discharge intervals, perform optimized management on the energy of an energy accumulation system on the basis of an SOC hierarchical control strategy, correct the charging and discharging power of the energy accumulation system in real time, optimize the working performance of the energy accumulation system, make and implement most appropriate control strategies, guarantee that the micro-grid participates in large power grid voltage adjusting according to the requirements of the large power grids during grid connection, and guarantee voltage stability during grid-connected operation.

Description

Technical field [0001] The invention relates to a monitoring method for a wind-solar-storage-integrated micro-grid capable of grid-connected operation. Background technique [0002] The energy and environmental crisis has become an important issue affecting the sustainable development of human beings, and the utilization of clean and renewable energy is the fundamental way to solve this problem. With the maturity of wind power generation, photovoltaic power generation, wave power generation and other renewable energy power generation technologies, more and more renewable energy microgrids are connected to the power grid in a distributed manner to meet people's daily production and living electricity needs. [0003] As a supplement to the ultra-high voltage, long-distance, and large-grid power supply mode, the micro-grid based on wind power and photovoltaic power generation represents a new development direction of the power system. The driving force of wind turbines is wind...

AI Technical Summary

Problems solved by technology

At the same time, since the wind turbine is an asynchronous machine, if it is not controlled, it needs to absorb a certain amount of reactive power while generating active power, and does not use the voltage stability of the system

When the wind power penetration rate is low, these effects are not obvious. With the increase of the wind power penetration rate, the impact of wind energy on the power system gradually increases. difficulty

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