2023 IEEE Belgrade PowerTech

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Pole-Phase Transformation For Ac/dc Hybrid Power Grids

AC/DC hybrid power grid is the new form of power grid development. The traditional analysis method of AC power grid is not suitable for AC/DC hybrid power grid. DC transmission system can be regarded as a two-port network. Thus it must be equivalent to an AC circuit and problems in AC/DC hybrid grids can be simplified to them in AC grids. Take this idea, the paper has done some preliminary works: based on LCC-HVDC under steady-state, a method of equivalent DC lines and converter stations to three-phase AC lines is proposed, which is called pole-phase transformation. The effectiveness of the method is verified in the simulation of LCC-HVDC model. The simulation results show that AC/DC hybrid power grids with LCC-HVDC can be equivalent to an AC grid built by the proposed pole-phase transformation method in the steady state.

Haonan Wang
State Key Lab. Of Power System and Generation Equipment, Tsinghua University
China

Boliang Jin
State Key Lab. Of Power System and Generation Equipment, Tsinghua University
China

Qihuan Dong
State Key Lab. Of Power System and Generation Equipment, Tsinghua University
China

Wujie Chao
State Grid Fujian Electric Power Research Institute
China

Xinzhou Dong
State Key Lab. Of Power System and Generation Equipment, Tsinghua University
China

 



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