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《Power System Technology》 2011-09
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Digital and Analog Hybrid Simulation of Interconnected UHVAC/UHVDC Transmission System From North China via Central China to East China

GUO Jianbo1,ZHOU Jun2,GUO Qiang1,ZHU Yiying1,HU Tao1,DONG Peng1, GUO Hu1,LIU Chong1,LI Xinnian1,LIU Yao1,CHEN Lingfang1(1.China Electric Power Research Institute,Haidian District,Beijing 100192,China;2.College of Electrical & Electronic Engineering,Huazhong University of Science and Technology,Wuhan 430074,Hubei Province,China)  
Combining full digital real-time simulation with physical simulation device for high voltage DC power transmission,a detailed electromagnetic transient real-time simulation model integrating with physical DC transmission system model of the equivalent network for the interconnected UHV power grid consisiting of North China power grid,Central China power grid and East China power grid is built.The main contents of detailed real-time simulation of the main network of the interconnected UHV power grid are bipolar emergency outage of the DC system and the interaction between AC and DC system in the region with multi-infeed DC system.Simulation results show that when bipolar emergency outage occurres in ?500 kV and ?660 kV DC system,the system is stable and it is not necessary to adopt security and stability measures;when when bipolar emergency outage occurres in ?800 kV DC system,the stable operation can be revocered by properly tripping out generation units at sending system;the fault occurred in the region with multi-infeed DC system in East China UHVAC system will cause commutation failures of multi DC circuits in this region,however after the AC fault is cleared,the DC power transmission will successivele recovered and the stable operation will also recovered;the UHV power backbone in 2015 can meet the requirements of guidelines for power system stability,the network structure of this inteconnected power grid is feasible.
【CateGory Index】: TM721.1
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