A High Fault Current Synchronous Condenser for Support of Renewable Grids

Nigel Schofield, Fuad Alhabill, Renqi Guo, Nan Zhao

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


With an increasing share of renewable energy sources being connected to electrical power networks, transient energy from the rotating inertia of traditional power plant is reducing. Renewable energy resources are highly dynamic and somewhat intermittent compared to more traditional generation sources. Hence, they pose a challenge to the electrical network operator in terms of effectively managing their resources to maximize energy transfer while maintaining stable operation. Existing renewable generation normally has low transient energy, which reduces system inertia. This increases the specification requirements of other interconnected components. Specifically, the physical characteristics of power electronics limits the output current of renewable schemes during fault. The paper will initially discuss the operational concept of a synchronous condenser with reference to the support of renewable and localized embedded generation. An example synchronous condenser design is presented to illustrate the provision of some limited energy input during energy transients, some reactive VAR capability, but importantly, supply of high transient fault currents. The paper discusses the synchronous condenser electromagnetic design in terms of machine impedance to realize high fault levels. A low power synchronous machine is studied to illustrate design considerations.

Original languageEnglish
Title of host publication22nd Wind and Solar Integration Workshop
Subtitle of host publication(WIW 2023)
Number of pages6
ISBN (Electronic)9781839539664
Publication statusPublished - 19 Dec 2023
Event22nd Wind and Solar Integration Workshop - Copenhagen, Denmark
Duration: 26 Sep 202328 Sep 2023
Conference number: 22


Conference22nd Wind and Solar Integration Workshop
Abbreviated titleWIW 2023

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