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Title: Frequency Support of PMSG-WTG Based on Improved Inertial Control: Preprint

Abstract

With increasing integrations of large-scale systems based on permanent magnet synchronous generator wind turbine generators (PMSG-WTGs), the overall inertial response of a power system will tend to deteriorate as a result of the decoupling of rotor speed and grid frequency through the power converter as well as the scheduled retirement of conventional synchronous generators. Thus, PMSG-WTGs can provide value to an electric grid by contributing to the system's inertial response by utilizing the inherent kinetic energy stored in their rotating masses and fast power control. In this work, an improved inertial control method based on the maximum power point tracking operation curve is introduced to enhance the overall frequency support capability of PMSG-WTGs in the case of large supply-demand imbalances. Moreover, this method is implemented in the CART2-PMSG integrated model in MATLAB/Simulink to investigate its impact on the wind turbine's structural loads during the inertial response process. Simulation results indicate that the proposed method can effectively reduce the frequency nadir, arrest the rate of change of frequency, and mitigate the secondary frequency drop while imposing no negative impact on the major mechanical components of the wind turbine.

Authors:
; ; ; ; ; ; ;
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Wind and Water Technologies Office (EE-4W)
OSTI Identifier:
1242685
Report Number(s):
NREL/CP-5D00-65916
DOE Contract Number:  
AC36-08GO28308
Resource Type:
Conference
Resource Relation:
Conference: To be presented at the 2016 IEEE Power and Energy Society General Meeting, 17-21 July 2016, Boston, Massachusetts
Country of Publication:
United States
Language:
English
Subject:
17 WIND ENERGY; 24 POWER TRANSMISSION AND DISTRIBUTION; inertial response; permanent magnet synchronous generator wind turbine; FAST model; frequency regulation; maximum power point tracking; National Renewable Energy Laboratory; NREL

Citation Formats

Wu, Z., Wang, X., Gao, W., Kang, M., Hwang, M., Kang, Y., Gevorgian, Vahan, and Muljadi, Eduard. Frequency Support of PMSG-WTG Based on Improved Inertial Control: Preprint. United States: N. p., 2016. Web. doi:10.1109/PESGM.2016.7742060.
Wu, Z., Wang, X., Gao, W., Kang, M., Hwang, M., Kang, Y., Gevorgian, Vahan, & Muljadi, Eduard. Frequency Support of PMSG-WTG Based on Improved Inertial Control: Preprint. United States. doi:10.1109/PESGM.2016.7742060.
Wu, Z., Wang, X., Gao, W., Kang, M., Hwang, M., Kang, Y., Gevorgian, Vahan, and Muljadi, Eduard. Tue . "Frequency Support of PMSG-WTG Based on Improved Inertial Control: Preprint". United States. doi:10.1109/PESGM.2016.7742060. https://www.osti.gov/servlets/purl/1242685.
@article{osti_1242685,
title = {Frequency Support of PMSG-WTG Based on Improved Inertial Control: Preprint},
author = {Wu, Z. and Wang, X. and Gao, W. and Kang, M. and Hwang, M. and Kang, Y. and Gevorgian, Vahan and Muljadi, Eduard},
abstractNote = {With increasing integrations of large-scale systems based on permanent magnet synchronous generator wind turbine generators (PMSG-WTGs), the overall inertial response of a power system will tend to deteriorate as a result of the decoupling of rotor speed and grid frequency through the power converter as well as the scheduled retirement of conventional synchronous generators. Thus, PMSG-WTGs can provide value to an electric grid by contributing to the system's inertial response by utilizing the inherent kinetic energy stored in their rotating masses and fast power control. In this work, an improved inertial control method based on the maximum power point tracking operation curve is introduced to enhance the overall frequency support capability of PMSG-WTGs in the case of large supply-demand imbalances. Moreover, this method is implemented in the CART2-PMSG integrated model in MATLAB/Simulink to investigate its impact on the wind turbine's structural loads during the inertial response process. Simulation results indicate that the proposed method can effectively reduce the frequency nadir, arrest the rate of change of frequency, and mitigate the secondary frequency drop while imposing no negative impact on the major mechanical components of the wind turbine.},
doi = {10.1109/PESGM.2016.7742060},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2016},
month = {3}
}

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