NDLI: Stabilising influence of a synchronous condenser in low inertia networks

Content Provider	IET Digital Library
Author	Mohanan, Vishnu Arayamparambil Vinaya Mareels, Iven M. Y. Evans, Robin J. Kolluri, Ramachandra Rao
Abstract	Power systems have to be reinforced to accommodate a high penetration of renewable energy sources. Recent research shows that the stability margin of the grid degrades with the penetration of grid-tied photovoltaic generators into the grid. In the model presented in the study, the critical level of photovoltaic penetration is associated with a Hopf bifurcation in the field dynamics of the synchronous generators which severely limits the operating domain of the grid. It is shown that the judicious introduction of synchronous condensers in the modelled grid delays this dynamic instability. A small-signal analysis is performed for a system where the reactive power and inertial response is supplemented using a synchronous condenser. The study shows that the modified network tolerates much higher participation of photovoltaic generation in the grid. It is shown that the modified network retains the classical power system control approach and also does not demand a change in the way the photovoltaic generation is injected, thereby making it a natural implementation. The synchronous condenser augments the operational domain of the system significantly, nearly eliminating the need for renewable energy curtailment. A case-study approach is used to present results on improvements in damping ratio, feasibility domain and transient stability.
Starting Page	3582
Ending Page	3593
Page Count	12
ISSN	17518687
Volume Number	14
e-ISSN	17518695
Issue Number	Issue 17, Sep (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-gtd/14/17
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-gtd.2020.0178
Journal	IET Generation, Transmission & Distribution
Publisher	The Institution of Engineering and Technology
Publisher Date	2020-06-09
Access Restriction	Open
Rights License	Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0/)
Subject Keyword	Bifurcation Classical Power System Control Approach Control of Electric Power System Damping Distributed Power Generation Grid Degrades Grid-tied Photovoltaic Generator Low Inertia Network Modelled Grid Delay This Dynamic Instability Modified Network Tolerates Much Higher Participation Operating Domain Operational Domain Optimisation Technique Photovoltaic Generation Photovoltaic Penetration Photovoltaic Power System Power Generation Control Power Grid Power System Power System Control Reactive Power Renewable Energy Curtailment Renewable Energy Source Solar Power Stations Synchronous Condenser Synchronous Generator Synchronous Machine
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Energy Engineering and Power Technology Electrical and Electronic Engineering

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