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

doi:10.3969/j.issn.1000-7229.2019.03.013

Abstract

Abstract: 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.

Key words: AC/DC hybrid system, distributed generation, uncertainty set, zonotope, power flow analysis, control mode

CLC Number:

TM 73

XU Chenbo， ZHOU Zhifang， GAO Jianing， WANG Kun， YUAN Xiang. Quantitative Analysis Method for the Influence of DGs Uncertainty on the Power Flow of AC/DC Hybrid System[J]. Electric Power Construction, 2019, 40(3): 102-108.

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