Analysis of the Influence of Renewable Generator Frequency Endurance Capability on Low-Frequency Load Shedding: A Hunan Case Study
Table 1
Frequency response time requirements of distributed generation.
Frequency range
Requirements
f ＜ 48 Hz
The type of converter is determined by the distributed generation according to the minimum allowable frequency of the converter or the requirements of the grid dispatching organization
48 Hz ≤ f＜49.5 Hz
It is required to operate for at least 10 min each time when it is lower than 49.5 Hz.
49.5 Hz ≤ f＜50.2 Hz
Continuous operation
50.2 Hz＜f ≤ 50.5 Hz
When the frequency is higher than 50.2 Hz, the distributed generation should have the ability to reduce the active power output, and the actual operation can be decided by the power grid dispatching organization; at this time, the distributed generation in the outage state is not allowed to be integrated into the power grid
f ＞ 50.5 Hz
The power transmission to the grid line will be terminated immediately, and the grid integration of distributed generation in the shutdown state is not allowed
