National development peak load regulation and frequency storage

What is the multi-timescale regulation capability of a power system?

The multi-timescale regulation capability of the power system (peak and frequency regulation, etc.) is supported by flexible resources, whose capacity requirements depend on renewable energy sources and load power uncertainty characteristics.

Does es capacity enhance peak shaving and frequency regulation capacity?

However, the demand for ES capacity to enhance the peak shaving and frequency regulation capability of power systems with high penetration of RE has not been clarified at present. In this context, this study provides an approach to analyzing the ES demand capacity for peak shaving and frequency regulation.

What is the maximum load of a power system?

The maximum load of the power system is 9896.42 MW. The conventional units of the system mainly consist of 18 units of three types, with a total installed capacity of 7120 MW.

What is the power and capacity of Es peaking demand?

Taking the 49.5% RE penetration system as an example, the power and capacity of the ES peaking demand at a 90% confidence level are 1358 MW and 4122 MWh, respectively, while the power and capacity of the ES frequency regulation demand are 478 MW and 47 MWh, respectively.

What are the use cases for frequency regulation & peak shaving?

The two specific use cases this document covers are frequency regulation and peak shaving. A period of frequency disturbance, being associated with under- and over-generation events, is likely to be accompanied by under- and over-voltage events in a stressed system.

How does a frequency regulation duty cycle work?

During a frequency regulation duty cycle, when an ESS discharges to counter under-generation, the ESS also sources vars, and when the ESS charges to counter excess generation, it also sinks var. This enables maintaining the grid frequency within the required frequency range, while providing voltage support in the required direction.