Optimization Method of Under Frequency Load Shedding Schemes for Systems with High Permeability New Energy

This paper analyzes the influence of high permeability new energy on the frequency characteristics of the system, and proposes a multi-objective optimization model for under frequency load shedding (UFLS), which takes the proportions of load shedding of each round as the optimization variables. A multi-objective optimization model is established, in which mean frequency deviation and load shedding amount are considered as objectives. And the system dynamic frequency and load shedding of each round are set as constraints. An example of the 10 machines 39-nodes system shows that the proposed scheme can make the system have better frequency stability and reduce load shedding.