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Effects of Control Algorithms on Transient Recovery Process in UHVDC Transmission System

机译:控制算法对特高压直流输电系统暂态恢复过程的影响

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To improve the dynamic recovery characteristic of ultra high voltage dc (UHVDC) transmission system, this paper focuses on effects of nonlinear optimal control and PI control in transient recovery process. Control systems in UHVDC based on state feedback exact linearization method and PI controllers are respectively established. The rationality and validity of UHVDC transmission system on resisting disturbances are verified by simulation results using PSCAD/EMTDC software. Compared with PI controllers, nonlinear optimal control can keep constant current and voltage more accurately, shorten system recovery time about 50%, realize the decoupling control, are more useful for system stability of UHVDC and ac networks.
机译:为了提高超高压直流输电系统的动态恢复特性,本文重点研究了非线性最优控制和PI控制在暂态恢复过程中的作用。建立了基于状态反馈精确线性化方法的超高压直流输电控制系统和PI控制器。利用PSCAD / EMTDC软件的仿真结果验证了特高压直流输电系统抵抗干扰的合理性和有效性。与PI控制器相比,非线性最优控制可以更精确地保持恒定电流和电压,将系统恢复时间缩短约50%,实现去耦控制,对于UHVDC和ac网络的系统稳定性更有用。

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