Method for improving wind power acceptance based on participation of battery energy storage

Abstract

The invention discloses a method for improving wind power acceptance based on participation of battery energy storage, and belongs to the technical field of grid energy control. According to the method, the SOC parameter of the whole battery energy storage device at the current moment is accurately calculated; the charging and discharging capacity of the battery energy storage device is judged inadvance, and then the charging and discharging power of each energy storage unit of the battery energy storage device is distributed by calculating the unbalanced power when the wind power of the power distribution network fluctuates, so that each energy storage unit in the battery energy storage device receives the wind power with the maximum charging and discharging capacity. On the premise of constraining the charging and discharging power and the state of charge SOC of the battery energy storage unit, the charging optimization coefficient and the discharging optimization coefficient are introduced to optimize the charging and discharging power of the whole battery energy storage device when the wind power of the power distribution network fluctuates, and the optimal charging and discharging power of the battery energy storage device when the wind power of the power distribution network fluctuates is obtained, so that the wind power acceptance capability of the whole battery energystorage device is improved.

Description

technical field [0001] The invention relates to the technical field of power grid energy control, in particular to a method for improving wind power acceptance capacity based on the participation of battery energy storage. Background technique [0002] With the shortage of energy resources and the improvement of environmental requirements, the development and utilization of clean energy power generation has become a research hotspot. Among them, as a relatively mature technology in the development and utilization of renewable clean energy, wind power has the greatest prospect for the development and application of renewable energy. my country's wind turbines are mainly distributed in the "Three North" regions (Northwest, Northeast, and North China) where wind resources are abundant. Power quality and other interferences have caused serious wind curtailment problems, and the distribution network's ability to accept wind power has decreased. [0003] In view of the above-ment...

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Problems solved by technology

The method of improving the power structure of the system will increase the investment cost and operating cost of the power system, consume a large amount of resources, and increase the difficulty of operating the power system; the use of smart grid technology will cause technical limitations and disadvantages for power systems with unsound smart grid technology configurations. It is impossible to fully mobilize battery energy storage resources; wind power forecasting and demand-side management cannot accurately achieve full acceptance of wind power by battery energy storage devices when wind power fluctuates, and wind power forecasting has a large inability, and load demand-side management has problems. big uncertainty

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