When faults such as blocking and commutation failure occur in a high-voltage direct current(HVDC)transmission system,they can cause transient voltage fluctuations near the sending-side converter station and lead to the disconnection with power grid.Firstly,the operating principles,response characteristics,and key parameter in-fluences of the grid-forming energy storage open-loop control strategy are analyzed.Then,the reactive response char-acteristics of the synchronous condenser are analyzed,and a comparison is made between the grid-forming energy storage reactive power control model and the excitation regulation control model.Finally,a semi-physical simulation system is established,including EHVDC,photovoltaics,synchronous condenser,and grid-forming energy storage,to conduct comparative experiments on the effect of suppressing AC transient overvoltage under DC commutation failure.The results indicate that grid-forming energy storage and distributed synchronous condenser with the same capacity can achieve similar effects in terms of reactive transient response speed and the ability to suppress AC tran-sient overvoltage.
grid-forming energy storagesynchronous condenserHVDC transmission systemcommutation fail-urereactive power supporttransient overvoltage
国家科技期刊平台
NSTL
维普
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