Based on the fast response time and high response accuracy of energy storage, the frequency regulation loss resistance coefficient of energy storage and thermal power is constructed to improve the enthusiasm of energy storage.
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.
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.
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.
Do thermal power units meet the AGC frequency regulation instruction?
Due to the design of the residual frequency regulation capacity constraint in this paper, only the thermal power units and the energy storage frequency regulation capacity are considered to meet the AGC frequency regulation instruction in the optimization stage. 4.3.2. Thermal power units constraints
The proposed control approach is compared to the operating conditions of single thermal power unit regulation, thermal power energy storage combined regulation, and thermal power flexible load combined regulation using the model developed in this article. The system's primary source of power is a thermal power unit.