A lever control method for peak shaving and valley filling based on battery energy storage

Abstract

The invention belongs to the technical field of power grids, and in particular relates to a control method for peak-shaving and valley-filling levers based on battery energy storage. In the power grid system where a large number of batteries are installed, the battery not only fulfills the requirement of storing electric energy, but also plays an irreplaceable role in alleviating the peak shaving of the power grid. Including modeling the energy storage state of the battery itself; calculating the reduced power generation capacity during the valley period; calculating the valley value increased at the valley moment; By controlling the difference in power generation at different stages and the load situation, the charging and discharging time is calculated, and the lever form is achieved at the time of controlling the charging and discharging, and the use of less battery energy storage can achieve a greater degree of peak-shaving and valley-filling effect. On the premise of reducing the standby capacity of the unit, it can also ensure the reliability of power supply, save a lot of energy, improve the peak-shaving and valley-filling ability of the power grid, reduce the peak-valley difference, and make the control of the power grid more stable and reliable.

Description

technical field [0001] The invention belongs to the technical field of power grids, and in particular relates to a control method for peak-shaving and valley-filling levers based on battery energy storage. In the power grid system where a large number of batteries are installed, the battery not only fulfills the requirement of storing electric energy, but also plays an irreplaceable role in alleviating the peak shaving of the power grid. Background technique [0002] In the current power system where multi-energy power generation is continuously connected to the grid, traditional generator sets are not capable of peak regulation for current new energy power generation. In order to ensure the safe operation of the power grid, the main method adopted in the current power grid When the load in the grid is at a peak time, all the units are put into the grid to ensure the reliability of power consumption of the grid. However, when the load is in a low period, due to the large num...

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Problems solved by technology

[0002] In the current power system where multi-energy power generation is continuously connected to the grid, traditional generator sets are not capable of peak regulation for current new energy power generation. In order to ensure the safe operation of the power grid, the main method adopted in the current power grid When the load in the grid is at a peak time, all the units are put into the grid to ensure the reliability of power consumption of the grid. However, when the load is in a low period, due to the large number of input units, the minimum output of all units is maintained. When the situation is still greater than the load demand, a large number of new energy power stations can only be cut off from the grid, resulting in a large amount of energy waste

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