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发明公开
CN104319758A 一种柔性直流输电系统全局稳定的指数收敛控制方法 失效 - 权利终止

一种柔性直流输电系统全局稳定的指数收敛控制方法
摘要：
本发明公开了一种柔性直流输电系统全局稳定的指数收敛控制方法，包括以下步骤：1)得柔性直流输电系统的PCHD模型；2)预设柔性直流输电系统的能量函数，当VSC-HVDC系统的无源性时，则根据预设互联矩阵Jd及阻尼矩阵Ra(x)，改变系统原有的能量函数，得新的PCHD模型；3)选取VSC-HVDC系统所需的稳态平衡点，然后构建所需的闭环存储函数Hd(x)，使所述闭环存储函数Hd(x)满足IDA-PB定理条件；4)得柔性直流输电系统的指数稳定IDA-PB控制器，然后根据指数稳定IDA-PB控制器控制柔性直流输电系统。本发明可以使柔性直流输电系统在受到大干扰或是系统参数无法精确预知时，具有良好的稳态、暂态特性，同时保持全局渐近稳定。
摘要（英）：

The invention discloses an exponential convergence control method for the global stability of a voltage source converter based high-voltage direct-current (VSC-HVDC) system, comprising the following steps: (1) obtaining a PCHD model of a VSC-HVDC system; (2) presetting an energy function of the VSC-HVDC system, and changing the original energy function of the system according to a preset interconnection matrix Jd and a damping matrix Ra(x) to obtain a new PCHD model when the VSC-HVDC system is passive; (3) selecting a steady-state equilibrium point needed by the VSC-HVDC system, constructing a needed closed-loop storage function Hd(x), and enabling the closed-loop storage function Hd(x) to meet the conditions of an IDA-PB theorem; and (4) obtaining an exponential stability IDA-PB controller of the VSC-HVDC system, and controlling the VSC-HVDC system according to the exponential stability IDAPB controller. By adopting the method, the VSC-HVDC system is enabled to have good steady-state and transient property when the system is under large disturbance or system parameters cannot be accurately predicted, and the global asymptotic stability is maintained.

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