NDLI: Study on response characteristics of grid-side converter controller of PMSG to sub-synchronous frequency component

Content Provider	IET Digital Library
Author	Bi, Tianshu Li, Jingyi Zhang, Peng Colgan, Elliot Mitchell Xiao, Shiwu
Abstract	Multiple sub-/super-synchronous frequency components were detected when sub-synchronous oscillation (SSO) occured in permanent magent synchronous generator (PMSG)-based wind farm in Northwest China. This caused three 600 MW turbine generators to trip because of torsional oscillation of the shaft. Then for one year, for eliminating the multiple frequency components, the relevant wind farms have been tripped for 111 times. The tripped wind power sometimes could even be up to 300 MW. However, the multiple frequency components' producing mechanism is still not clear. This study explains the mechanism by analysing the response characteristics of grid-side converter (GSC) controller to the sub-synchronous frequency component. When a sub-synchronous frequency component is fed into GSC controller as an input signal, the expression for the output signal is derived. Furthermore, the frequency transformation relationship between input and output signals, the amplitudes of multiple frequency components in output signals are all discussed in detail. The theoretical analysis is then validated by the simulation results and the on-site data measured by the phasor measurement unit (PMU). With the theoretical analysis, the main frequency components which should be suppressed are determined. The multiple frequency components can be mitigated not by tripping wind farms any more. This is conducive to the accommodation of renewable energy.
Starting Page	966
Ending Page	972
Page Count	7
ISSN	17521416
Volume Number	11
e-ISSN	17521424
Issue Number	Issue 7, Jun (2017)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-rpg/11/7
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-rpg.2016.0994
Journal	IET Renewable Power Generation
Publisher Date	2017-04-11
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	A.C. Machine Frequency Transformation Relationship Grid-side Converter Controller GSC Controller Multiple Subsuper-synchronous Frequency Component Northwest China Permanent Magnet Generator Permanent Magnet Synchronous Generator PMSG Power 600 MW Power Converter Power Generation Protection Power Grid Power Supplies to Apparatus Protection Apparatus Protection Device Renewable Energy Shaft Torsional Oscillation Shafts SSO Subsynchronous Frequency Component Subsynchronous Oscillation Synchronous Generator Turbine Generator TurboGenerator Wind Farm Wind Power Plant Wind Power Tripping
Content Type	Text
Resource Type	Article
Subject	Renewable Energy, Sustainability and the Environment

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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