Energy storage control method based on load characteristic tracking

Abstract

The invention provides an energy storage control method based on load characteristic tracking. The method comprises the following steps: S1, judging the type of a current electricity price period; S2, executing a corresponding preset charging and discharging scheme on a battery pack of a load line according to the type of the current electricity price period, wherein the preset charging and discharging scheme determines a charging and discharging strategy according to the system load, the maximum power demand and the battery energy storage margin of the battery pack; and S3, evaluating and executing the charging and discharging strategy. According to the energy storage control method based on load characteristic tracking, multiple factors such as power utilization characteristics, load characteristics, economic benefits and energy storage sustainable operation regulation and control of user side energy storage are comprehensively considered, and the method is more suitable for current users.

Description

Technical field [0001] The present invention relates to the field of energy storage control, and more particularly to a storage control method based on load characteristic tracking. Background technique [0002] The energy storage is mainly divided into two categories according to its functions: [0003] Power grid side energy storage, providing multiple services such as peak, black start, demand response to the grid, relieve the intermittent energy of renewable energy, promote grid peaks, solve the problem of regional load balance, relieve peak power supply, guarantee The safe and reliable operation of the grid provides a new way for power grid security stability. [0004] User side energy storage, electrical and energy constructed on the user side. User-side storage utilization of peak cereal price difference saves electricity expenditure, in areas where the industrial and commercial electricity peak price is large, the return period of the energy storage and peaks and saves el...

AI Technical Summary

Problems solved by technology

[0005] The charging and discharging adjustment of energy storage needs to be combined with a suitable charging and discharging strategy. Most of the charging and discharging strategies for energy storage are designed in a single way, focusing more on peak-valley adjustment, using the peak-valley price difference to save electricity costs, without considering other factors, ignoring the user side The influence of energy storage characteristics on energy storage

[0006] With the development of the economy and the progress of the society, as well as the continuous improvement of the living standards of users, the diversity and complexity of the types of electricity consumption by users have resulted in an increasing imbalance between the load characteristics and the price difference between peak and valley periods. For example, a company recently The energy storage battery is fully charged at night. After the discharge and peak-shaving work is completed during the peak period of the next day, the remaining power of the battery is insufficient. However, while the battery needs to be charged, the company needs to increase production, which will further increase the current production load. If the energy storage is still rigidly charged according to the established peak discharge and valley charge adjustment strategy at this time, the energy storage, as the role of the user, cannot adjust the current load through discharge, but instead increases the user's demand for the overall load, resulting in the company's The demand is unbalanced. It can be seen that the strategy of adjusting charge and discharge only according to the peak and valley electricity price can no longer meet the current load change situation. There is an urgent need for an energy storage control strategy based on load characteristic tracking to adapt to this load change demand.

[0007] The strategy of adjusting energy storage operation only based on peak and valley electricity prices has limitations. Without considering the current user electricity consumption situation, only adjusting charging and discharging according to peak and valley electricity prices will cause:

[0008] 1. The demand exceeds the limit, resulting in a decline in overall economic benefits;

[0009] 2. The system load power is too large in a short period of time, which will have a certain impact on the safety of the system;

[0010] 3. Hidden danger of reverse power transmission of energy storage system;

[0011] 4. Impact on battery health;

[0012] 5. Not combined with other factors, such as the impact of seasonal factors on energy storage regulation

Images