Impact of Distributed Regulator on Stability Characteristics of Large-Scale New Energy DC Sending-End System
In response to the transient overvoltage and frequency stability issues caused by typical HVDC faults in an HVDC sending-end system with large-scale new energy,the author makes an analysis of the impact of distributed synchronous condensers connecting to the new energy stations on the stability characteristics of the system.Firstly,the principles of reactive power regulation and the moment of inertia of distributed synchronous condensers are introduced.Secondly,the principle of overvoltage protection for new energy units and the causes of transient overvoltage caused by typical faults in the HVDC sending-end system are introduced,and the impact of distributed synchronous condensers on system strength,i.e.DC short circuit ratio,transient overvoltage and dynamic frequency stability level in the HVDC sending-end system of new energy is analyzed.Finally,the role of distributed synchronous condensers in enhancing the system strength,transient voltage level,and frequency stability of the HVDC transmission sending-end system is verified through time-domain simulation.
国家科技期刊平台
NSTL
万方数据
