Abstract Multi-energy flow (MEF) analysis is the most fundamental issue in studying multi-energy carrier (MEC) systems. In the tight coupling MEC systems, the unified energy flow analysis is indispensable to tackle the problems of accuracy and in decomposition. Therefore, on the basis of the comprehensive node classification and modified Jacobian matrix, this paper proposes a unified energy flow analysis approach with Newton method considering initial guesses selection for complex MEC systems including electrical, gas, heating sub-networks. This approach is based on the presented convergence theorem, which can determine in advance whether the initialization can converge to results, since the Newton method, the main approach of the unified energy flow analysis, is sensitive to its initial guesses selection. Once the initialization can not converge, the proposed approach can help selecting proper initial guesses for Newton method to guarantee the convergence of the unified energy flow. Several cases are studied to demonstrate the effectiveness and applicability of the proposed approach on judging and choosing initialization for the unified energy flow analysis.

中文翻译：

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考虑复杂多能量载体系统初始猜测的统一能量流分析

摘要 多能流（MEF）分析是研究多能载体（MEC）系统的最基本问题。在紧耦合MEC系统中，统一能量流分析对于解决精度和分解问题是必不可少的。因此，本文在综合节点分类和修正雅可比矩阵的基础上，针对包括电力、燃气、供热子网在内的复杂MEC系统，提出了一种考虑初始猜测选择的牛顿法统一能量流分析方法。该方法基于所提出的收敛定理，可以预先确定初始化是否可以收敛到结果，因为统一能量流分析的主要方法牛顿法对其初始猜测选择敏感。一旦初始化不能收敛，所提出的方法有助于为牛顿法选择合适的初始猜测，以保证统一能量流的收敛。研究了几个案例，以证明所提出的方法在判断和选择统一能量流分析的初始化方面的有效性和适用性。