Optimal Site Selection Algorithm of Synchronous Condensers in Renewable Energy Resources Bases Considering Synchronization Stability
Synchronous condensers(SC)are usually equipped near large wind power and photovoltaic baseto sup-press wide-frequency oscillation,transient over-voltage and so on,thus promoting the grid-accommodable capacity of renewable energy resources.However,during a power grid failure,the active power output from new energy sources may cause the nearby connected SC'rotor to accelerate,and there may be a risk of synchronization instability in the SC.To avoid the synchronization instability when SCs are connected to the system,we propose a site selection algo-rithm based on nodal phase sensitivity that could reflect magnitude of phase change under perturbation.Reasonable installation range can be guided by the critical nodal phase sensitivity through analytical analysis of rotor angle char-acteristicof SC,which can offer guidance for site selection under constraints of small signal stability,transient overvolt-age and so on.Theoretical analysis and simulations illustrate that the site selection method can effectively reduce the risk of synchronous instability when SG connected,which can fully exert the ability of renewable energy consumption-support of SC.
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