【摘要】 针对配电网网络结构复杂,点多面广,配电自动化设备无法实现全覆盖,提出了一种基于非线性动力系统的局部配电网状态估计方法。所提出的方法是全局收敛的,并且可以使用PMU提供的稀疏同步相量量测而不受传统状态估计网络可观性的限制。对于电压控制或热极限控制等实际应用,需要有针对性地提高电压幅度或电压相角的精度,在这种情况下,提出了一种增强的状态估计模型,包括电压幅值测量残差约束和电压相角测量残差约束。仿真结果证实了所提方法的有效性。更多还原

【Abstract】 The distribution network has complex network structure,various types of equipment,and a wide range of operating points,while distribution automation equipment cannot achieve full coverage. This paper proposes a partial state estimation of distribution network method based on a nonlinear dynamical system approach. The proposed method is globally convergent and can use sparse synchronized phasor measurements without the traditional requirement of network observability. For the application of voltage control or thermal limit control,enhancing the accuracy of the voltage amplitude or the voltage phase angle is required. Under this situation,we propose an enhanced formulation including the voltage amplitude measurement residual constraints and voltage phase angle measurement residual constraints. The calculations cases show the effectiveness of the proposed method.更多还原