An improved DC power flow model with virtual transmission channel for restoring energy internet power flow solvability

Though the full AC power flow model can accurately represent the physical power system, the use of this model is limited in practice due to the computational complexity associated with its non-linear and non-convexity characteristics. For instance, the AC power flow model is not incorporated in the unit commitment model for practical power systems. Instead, an alternative linearized DC power flow model is widely used in today’s power system operational and planning tools. However, DC power flow model will be useless when reactive power and voltage magnitude are of concern. Therefore, a linearized AC (LAC) power flow model is needed to address this issue. This paper first introduces a traditional LAC model and then proposes an enhanced data-driven linearized AC (DLAC) model using the regression analysis technique. Numerical simulations conducted on the Tennessee Valley Authority (TVA) system demonstrate the performance and effectiveness of the proposed DLAC model.

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Improved Spot Market Clearing model based on DC Power Flow Model Based With PTDF Corrections

10.1109/cieec50170.2021.9511003 ◽

2021 ◽

Author(s):

Yang Bai ◽

Zhongfei Chen ◽

Peng Yu ◽

Long Wang ◽

Hui Song ◽

...

Keyword(s):

Power Flow ◽

Flow Model ◽

Spot Market ◽

Market Clearing ◽

Model Based ◽

Dc Power

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Comparison Between Linear and Nonlinear Governor Power Flow Formulations

International Journal of Emerging Electric Power Systems ◽

10.1515/ijeeps-2019-0194 ◽

2020 ◽

Vol 21 (2) ◽

Author(s):

João Alberto Passos Filho ◽

Othon Ferreira Avila ◽

Paula Oliveira La Gatta

Keyword(s):

New England ◽

Power Flow ◽

Flow Model ◽

Flow Problem ◽

Active Power ◽

Droop Control ◽

Dc Power ◽

Linear And Nonlinear ◽

System Frequency ◽

Power Flow Problem

AbstractThe main objective of this paper is to review and compare two methodologies to solve the power flow problem considering active power generation droop control. The first methodology is based on a DC power flow model, and the second one is based on a conventional full Newton power flow formulation. The study of two test systems is used to validate the proposed analysis; the first one is the 11-bus system with two distinct areas, and the second one is the 39-bus New England power system. The results presented validate and indicate the effectiveness of the DC power flow approach in order to estimate the steady-state system frequency deviations.

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The OPF Formulation and Solution for Energy Router Incorporated AC&DC Network

Recent Advances in Electrical & Electronic Engineering (Formerly Recent Patents on Electrical & Electronic Engineering) ◽

10.2174/2352096511666180718153349 ◽

2019 ◽

Vol 12 (5) ◽

pp. 453-463

Author(s):

Qing Duan ◽

Jing Guo ◽

Wanxing Sheng ◽

Guanglin Sha ◽

Ke-Jun Li ◽

...

Keyword(s):

Power System ◽

Power Flow ◽

Optimal Power Flow ◽

Vital Role ◽

Energy Internet ◽

Dc Power ◽

Optimal Power ◽

Optimal Target ◽

Power Electronic Technology ◽

Better Than

Background: The energy router based on power electronic technology is the core equipment of energy internet. Energy router can control the voltage of the port and regulate the power injected into the network flexibly. It is of great significance to study how the capability of the energy router can be used to improve characteristics of the power system. Methods: Based on the analysis of energy router, we construct a unified AC-DC power flow model for energy router considering its different control modes. Then, we establish an optimal power flow formulation for the energy router incorporated AC-DC network and propose the multi-objective function to optimize the comprehensive performance of the network. Several cases are observed and analyzed on a modified IEEE-57 system. Results: The result verifies that the optimal power flow formulation can optimize the control values of ports of the energy router and improve the operating state of the power system. The optimal target presented in this paper can improve the characteristics of the grid better than a single optimal target. Conclusion: Energy router will play a vital role in the energy internet based on the power system. The characters of the power system can be improved and the operating costs can be reduced by utilizing the functionality of energy router in regulating power flow.

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