How to improve the frequency regulation capacity of thermal power units?
In order to enhance the frequency regulation capacity of thermal power units and reduce the associated costs, multi-constrained optimal control of energy storage combined thermal power participating in frequency regulation based on life loss model of energy storage has been proposed. The conclusions are as follows:
Can energy storage support the frequency regulation of thermal power units?
Comprehensive evaluation index performance table. Therefore, in the current rapidly developing new energy landscape where conventional frequency regulation resources are insufficient, the proposed strategy allows for more economical and efficient utilization of energy storage to support the frequency regulation of thermal power units.
How does frequency regulation affect energy storage?
When the energy storage system must be charged under the condition of frequency regulation, the charge power absorbed by the energy storage system steadily decreases when the SOC is at a high boundary value, and it eventually cannot absorb the charge power when the SOC hits the critical value.
Can flexible load and energy storage be used to regulate frequency?
The method of using flexible load on the load side and energy storage on the power side to regulate frequency is proposed. The depth limit of energy storage action is proposed, which clarifies the dead zone and the maximum output limit.
Should thermal power units meet the SOC state limit?
In the past power grid dispatching, for the frequency regulation constraint of the combined system of thermal and energy storage, the thermal power units should meet its climbing ability and the energy storage should meet the SOC state limit, as described below.
What is a two-layer optimization control for thermal power and energy storage?
A two-layer optimization control for thermal power and energy storage is developed, taking into account the remaining frequency regulation capacity of the coordinated operation between them based on AGC instructions. This model considers the cost of frequency regulation loss and SOC deviations.
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