论文标题
测量MTDC系统的相互作用和稳定性
Measurement of the Interactions and Stability of MTDC Systems
论文作者
论文摘要
多末端HVDC系统的小信号稳定性与通过DC和AC网络的耦合不同的VSC之间的动态相互作用已成为现代电力系统安全和稳定运行的重要问题之一。另一方面，使用ν-GAP度量的稳健稳定性理论是稳定性分析和合成不确定反馈系统的有效工具。在本文中，我们将其与自我稳定系数方法结合使用，以测量相对稳定性并分析MTDC系统中不同相互作用路径的稳定性影响。稳定性指数被定义为表示MTDC系统中相互作用的不同路径的稳定性边缘。根据稳定性标准，提出了一种计算保留稳定性的不确定参数范围的方法。可以在数量上分析控制参数通过VSC之间的相互作用对鲁棒稳定性的影响。给出了广泛的例子以证明所提出方法的应用和有效性。
The small-signal stability of multi-terminal HVDC systems, which is related to the dynamic interactions among different VSCs through the coupling of DC and AC networks, has become one of the important issues for the safety and stable operation of modern power systems. On the other hand, the robust stability theory with ν-gap metric is an effective tool for the stability analysis and synthesis of uncertain feedback systems. In this paper, we combine it with the self-/en-stabilizing coefficients method to measure the relative stability and analyze the stability influence of different paths of interactions in an MTDC system. The stability index is defined to represent the stability margin with respect to different paths of interactions in an MTDC system. A method for calculating the range of uncertain parameters preserving the stability is presented based on the stability criterion. The influence of control parameters on robust stability through interactions among VSCs can be analyzed quantitatively. Extensive examples are given to demonstrate the application and the effectiveness of the proposed method.
