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Yang Y.,Guangdong Power Grid Dispatch and Control Center | Lin S.,South China University of Technology | Ouyang Y.,South China University of Technology | Liu M.,South China University of Technology | And 2 more authors.
Dianwang Jishu/Power System Technology | Year: 2013

In Matlab environment and using power system analysis tools (PSAT) software, the dynamic time-domain simulation of large-scale power grid with three-level voltage control system is implemented, and the influences of three-level voltage control system on transient voltage security of Guangdong power grid are analyzed. Analysis results show that the emergency action mode of secondary voltage control in the three-level voltage control system contributes to the post-fault transient voltage recovery of load buses in Guangdong power grid, however it cannot prevent the occurrence of transient voltage insecurity. For this reason, in allusion to transient voltage insecurity accident an optimal control strategy for emergency load shedding, in which the trajectory sensitivity is utilized to turn the dynamic optimal model into linear programming model to achieve emergency load shedding control strategy, is established, and it is verified by dynamic simulation that after serious fault the transient voltage security of Guangdong power grid can be recovered by the achieved control strategy. Source

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