VDCOL Parameters Optimization to Improve Multi-Infeed HVDC System Stability

doi:10.3969/j.issn.1000－7229.2016.09.011

Abstract

Abstract: In East China and South China power grid, it has formed the pattern that many HVDC transmission systems feed into the receiving-end grid. Because of the strong coupling of multi-infeed HVDC systems, AC voltage disturbance will lead to the commutation failure of multiple HVDC at the same time, even voltage instability. At first, this paper analyzes the inverter station dynamic reactive power change track of dual-infeed HVDC test systems, and reveals the mechanism that the optimization of voltage dependent current order limiter （VDCOL） parameters can reduce the total reactive power demand. According to the influence of resisting disturbance capacity of converter bus on DC power recovery characteristics, this paper proposes the optimization scheme of VDCOL parameter based on multi-infeed short circuit ratio （MSCR）. The simulation results of East China multi-infeed HVDC systems show that proposed optimization scheme of VDCOL parameter can reduce the reactive power demand of inverter station and improve the voltage stability of receiving end of power grid.

Key words: multi-infeed HVDC system, reactive power characteristic, multi-infeed short circuit ratio （MSCR）, voltage dependent current order limiter（VDCOL）, parameters optimization

CLC Number:

TM 721

LYU Sizhuo, YANG Ying, ZHENG Chao, SUN Weizhen, LI Jing, ZHANG Jing. VDCOL Parameters Optimization to Improve Multi-Infeed HVDC System Stability[J]. Electric Power Construction, 2016, 37(9): 79-.

References

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