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不恰当的HVDC控制系统会导致AC—DC系统动态失稳 ,引发交流系统次同步振荡 ,严重时可导致发电机轴系永久性损坏。文中利用复数力矩分析方法推导了HVDC系统的电磁力矩公式 ,用以定量地确定不同控制回路和控制方式下HVDC系统的动态稳定性 ,为进一步设计和改进HVDC的控制系统提供了理论依据。
Improper HVDC control system can lead to dynamic instability of AC-DC system, cause sub-synchronous oscillation of AC system and serious damage to permanent damage of generator shaft system. In this paper, the formula of electromagnetic torque of HVDC system is deduced by complex torque analysis method to quantitatively determine the dynamic stability of HVDC system under different control loops and control modes, which provides a theoretical basis for further design and improvement of HVDC control system.