Peak load shaving lever control method based on battery energy storage

Abstract

The invention belongs to the technical field of power grids, and in particular relates to a peak load shaving lever control method based on battery energy storage. In a large number of storage battery-mounted power grid systems, a storage battery not only serves to store electrical energy, but also plays an irreplaceable role in alleviating peak load regulating of the power grids. The method includes the following steps: performing modeling on its own energy storage state of the storage battery; calculating reduced power generation capacity during a low valley period; calculating a lifted lowvalley value at a low valley moment; and calculating peak-shaving capacity, and overall peak load shaving capability in a system with rated storage energy power and capacity of the storage battery. Through control of a difference in power generation capacity at different stages and load conditions, charging and discharging time are calculated, the charging and discharging time are controlled to achieve a lever form, less battery storage energy is utilized to achieve a function of peak load shaving to a great extent, and so, under the premise of reducing the spare capacity of a unit, the reliability of power supply can be ensured, a lot of energy is saved, the peak load shaving capacity of the power grids is improved, a peak-to-valley difference is reduced, and the control of the power grids is 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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