An Extreme Learning Machine-Based System Frequency Nadir Constraint Linearization Method

Autor:	Liu, Likai, Hu, Zechun, Pathak, Nikhil, Luo, Haocheng
Rok vydání:	2021
Předmět:	Electrical Engineering and Systems Science - Systems and Control
Druh dokumentu:	Working Paper
Popis:	Large-scale integration of converter-based renewable energy sources (RESs) into the power system will lead to a higher risk of frequency nadir limit violation and even frequency instability after the large power disturbance. Therefore, it is essential to consider the frequency nadir constraint (FNC) in power system scheduling. Nevertheless, the FNC is highly nonlinear and non-convex. The state-of-the-art method to simplify the constraint is to construct a low-order frequency response model at first, and then linearize the frequency nadir equation. In this letter, an extreme learning machine (ELM)-based network is built to de-rive the linear formulation of FNC, where the two-step fitting process is integrated into one training process and more details about the physical model of the generator are considered to reduce the fitting error. Simulation results show the superiority of the proposed method on the fitting accuracy. Comment: This paper has been submitted to the CSEE Journal of Power and Energy Systems
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2108.05673 Zobrazit plný text záznamu View this record from Arxiv