The Architecture and Key Technologies of Fault Inversion System for Hybrid UHV AC/DC Power Grid

doi:10.11930/j.issn.1004-9649.201911114

Abstract

Abstract: The security and stability problems of power grid have become increasingly prominent for the complexity and fragility of large-scale hybrid AC/DC. In order to quickly and accurately simulate the fault characteristics of power grid, a fault inversion method is proposed for the hybrid UHV AC/DC power grid. A complete and accurate fault inversion model is generated by integrating the mode offline model of Power System Data Base (PSDB) with the real-time online model of Smart Grid Dispatching and Control System, which can not only solve the problem of missing transient parameters of the real-time online model, but also overcome the difficulty that the mode offline model cannot reflect the power flow of power grid in real-time. Besides, this model shortens fault inversion time from 2 to 3 weeks to a few seconds, as a result, greatly improving the working efficiency of the computation staff and meeting the requirements of timeliness and accuracy of fault inversion calculation. The model is used to simulate the power grid, and the results shows that it can accurately simulate the changes of electricity volume in the process of power grid fault. The system has been installed successfully and put into use in State Grid Simulation Center. The fault inversion analysis is carried out for State Grid Dispatch Center and Central China power grid, and the results have verified the effectiveness of the proposed scheme.

Key words: mode offline model, real-time online model, fault inversion model, simulation calculation and analysis, hybrid UHV AC/DC power grid

WANG Bing, JIA Yupei, YAN Jianfeng, JIN Yiding. The Architecture and Key Technologies of Fault Inversion System for Hybrid UHV AC/DC Power Grid[J]. Electric Power, 2020, 53(6): 64-71.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.201911114

https://www.electricpower.com.cn/EN/Y2020/V53/I6/64

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