DG出力不确定性对交直流混合系统潮流影响的量化分析方法

交直流混合系统可以有效接纳多种分布式电源（distributed generation，DG），为研究DG出力不确定性对交直流混合潮流的影响，提出了基于齐诺多面体和线性化潮流的量化分析方法。首先采用齐诺多面体建立DG功率注入的不确定集合，随后通过线性化交直流统一潮流模型，得到了状态量的不确定集合，其包含电压、相角等状态量所有可能的取值，从而分析系统在不确定条件下的运行安全性。文章将所提方法运用在含不同控制方式的交直流混合电网算例中，验证了所提方法的有效性和实用性。

Quantitative Analysis Method for the Influence of DGs Uncertainty on the Power Flow of AC/DC Hybrid System

AC/DC hybrid system can effectively integrate different types of distributed generators. In order to analyze the impact of uncertain power output of DGs on AC/DC hybrid power flow， a quantitative analysis method based on zonotope and linearized power flow model is proposed. Zonotope is used to construct the uncertainty set of DG power injections， and then through a linearized AC/DC unified power flow model， the uncertainty set of state variables is obtained， which bounds all possible values of the system state variables such as voltage magnitudes and angles， and can be used to analyze the operational safety of the system under uncertainties. Finally， the proposed method is applied to an AC/DC hybrid grid with different control modes and the results verify the effectiveness and practicality of the method.