A Fixed-Point Based Distributed Method for Energy Flow Calculation in Multi-Energy Systems

Zhang, Gang; Zhang, Feng; Meng, Ke; Zhang, Xin; Zhang, Dong

doi:10.1109/tste.2020.2966737

Cited by 27 publications

(9 citation statements)

References 25 publications

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“…Basically, there are two general ways to realize combined energy analysis of PG and HN: 1) integrate the models of PG and HN, and solve them as a whole; 2) decouple the PG and HN at the coupling facilities and solve each model separately (sometimes iteratively until a globally convergent solution is achieved). For the studies with the approximation HN models, integrated solution can be tractable if the iterative matrix is well-conditioned [23][24][25][26][27][28], while the decoupled way of solution can also see good performance [5,[29][30][31][32][33]. But for the PDE model after discretization, the decoupled way of solution is more achievable due to the problem scale of the discretized equations, which is adopted in [4,[6][7][8]22].…”

Section: B Literature Reviewmentioning

confidence: 99%

Fast and Generic Quasi-dynamic Energy Flow Calculation of the Electricity-Heat Integrated Energy System

Shuai¹,

Gu²,

Wu³

et al. 2022

Preprint

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<p>Energy flow analysis is a fundamental tool to determine the network states of the integrated energy systems. For the widely deployed IES with coupled power grids (PG) and heating networks (HN), we still lack a generic tool that can be easily employed to calculate its quasi-dynamic energy flows. In this paper, we have developed a generic code package (named as MATHN) for energy flow analysis of the quality-regulated HN. Based on it, a generic solution framework that leverages MATPOWER and MATHN to realize decomposed energy flow calculation of PG and HN is further proposed. Behind the MATHN tool, a model reformulation technique is proposed to eliminate the massive indirect variables of the basic HN model discretized by finite difference, which finally derives a compact matrix formulation (similar to the network equation of power grid: I=YU) for generic description of any HN and also slashes the original model scale by around 20 times. Moreover, the solution strategy behind the MATHN tool further converts this matrix formulation into a standard system of non-homogeneous linear equations, with which some existing well-recognized algorithms can be directly employed for efficient and accurate solution. All the codes and input data are made open-source for non-commercial use.</p>

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Section: B Literature Reviewmentioning

confidence: 99%

Fast and Generic Quasi-dynamic Energy Flow Calculation of the Electricity-Heat Integrated Energy System

Shuai¹,

Gu²,

Wu³

et al. 2022

Preprint

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“…Existing domestic and international research on power grid CPS modeling has mainly focused on information and communication effects modeling [14][15][16][17][18][19], cyber-physical interaction modeling [20][21][22][23][24][25], and cyber-physical coupling process modeling [26][27][28][29][30][31][32][33][34][35].…”

Section: Introductionmentioning

confidence: 99%

“…The reference [31] proposed a coupling modeling method for a power CPS based on set theory according to the logical structure analysis of a power grid CPS. The reference [32][33] put forward modeling ideas and static modeling methods of information flow, and the reference [34][35] conducted related research on the modeling and quantitative analysis of information flow.…”

Section: Introductionmentioning

confidence: 99%

Modeling Method for the Coupling Relations of Microgrid Cyber-Physical Systems Driven by Hybrid Spatiotemporal Events

Chen

et al. 2021

IEEE Access

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The essence of the microgrid cyber-physical system (CPS) lies in the cyclical conversion of information flow and energy flow. Most of the existing coupling models are modeled with static networks and interface structures, in which the closed-loop data flow characteristic is not fully considered. It is difficult for these models to accurately describe spatiotemporal deduction processes, such as microgrid CPS attack identification, risk propagation, safety assessment, defense control, and cascading failure. To address this problem, a modeling method for the coupling relations of microgrid CPS driven by hybrid spatiotemporal events is proposed in the present work. First, according to the topological correlation and coupling logic of the microgrid CPS, the cyclical conversion mechanism of information flow and energy flow is analyzed, and a microgrid CPS architecture with multi-agents as the core is constructed. Next, the spatiotemporal evolution characteristic of the CPS is described by hybrid automata, and the task coordination mechanism of the multi-agent CPS terminal is designed. On this basis, a discrete-continuous correlation and terminal structure characteristic representation method of the CPS based on heterogeneous multi-groups are then proposed. Finally, four spatiotemporal events, namely state perception, network communication, intelligent decision-making, and action control, are defined. Considering the constraints of the temporal conversion of information flow and energy flow, a microgrid CPS coupling model is established, the effectiveness of which is verified by simulating false data injection attack (FDIA) scenarios.INDEX TERMS Microgrid cyber-physical systems, spatiotemporal event-driven, multi-agent, coupling modeling, CPS terminal.

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“…In the vein of distributed operation (namely without presence of a center), different methods are presented in various literature such as PDMM, ADMM, etc. In [10][11][12][13], some of these approaches in the operation of the network microgrids can be found. The alternating-direction method of multipliers (ADMM) approach is one of the most well-known ways of distributed operation that has several features [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

“…In the heat section, the CHP and boiler units are considered as the heat generation units which must supply the thermal demand. The heat balance is shown in (8) and the limits of heat units are provided by constraints (10) and (11). It is cristal clear that the consumed gas of the CHP and boiler units must be equated with the generation gas of the gas network which is represented by inspection (9).…”

mentioning

confidence: 99%

Towards Energy Management Negotiation Between Distributed AC/DC Networks

Mohamed

Abdullah²,

Al-Sumaiti

et al. 2020

IEEE Access

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The ongoing development of technology has changed the nature of electric networks in the field of electric power generation. In the same vein, the generation units and demands are getting close by the integration of distributed resources within the distribution system with the aim of bringing more advantages to the system. Considering the promising concept of hybrid networks, which comprises different distributed resources, as a supportive element for the power system, this paper mainly focuses on modeling a distributed hybrid network, through which both the AC and DC loads can be supplied within the hybrid network. This network is operated in a distributed way where no independent operator is assumed for the operation. The primal-dual method of multipliers (PDMM) as an effective distributed method handles the operation of this network. So far, this method has only been applied to the AC grid or DC grid separately, while the presented method is modified for the operation of the hybrid network. Convergence speed and preciseness are mentioned as the advantages of this method which dominates the alternating direction method of multipliers (ADMM). In real cases, there are some errors in the output power of the renewable resources. Aiming to make the presented PDMM method more applicable, the uncertainty is also modelled using the Unscented Transform (UT) approach, as a way of uncertainty modelling which has shown attractive features, especially the capability of correlation modelling; therefore, it is more preferable for uncertainty modeling in many cases compared to the other methods. The proposed work is implemented on a smart island and the authenticity of this work is proved by comparing the performance of the proposed distributed approach with the centralized method.

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A Fixed-Point Based Distributed Method for Energy Flow Calculation in Multi-Energy Systems

Cited by 27 publications

References 25 publications

Fast and Generic Quasi-dynamic Energy Flow Calculation of the Electricity-Heat Integrated Energy System

Fast and Generic Quasi-dynamic Energy Flow Calculation of the Electricity-Heat Integrated Energy System

Modeling Method for the Coupling Relations of Microgrid Cyber-Physical Systems Driven by Hybrid Spatiotemporal Events

Towards Energy Management Negotiation Between Distributed AC/DC Networks

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