An Improved Second Order Method for Optimal Load Flow

Bala, J.L.; Thanikachalam, A.

doi:10.1109/tpas.1978.354606

Cited by 27 publications

(10 citation statements)

References 10 publications

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“…By expressing the increased ATC with thermal constraints as dATC(DR), (7) can be written in the following form. The terms which are changed by the dynamic rating are the second and the third terms which are temperature sensitivity and wind speed sensitivity respectively.…”

Section: Proposed Methodsmentioning

confidence: 99%

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Application of dynamic rating to evaluation of ATC with thermal constraints considering weather conditions

Miura

Satoh

Iwamoto

et al. 2006

2006 IEEE Power Engineering Society General Meeting

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Recently, with the advance of communication technologies and sensors, the so-called dynamic rating is now to be realized. The dynamic rating is a method to determine accurate ratings by utilizing real-time information such as conductor temperatures, ambient temperatures and wind speed. The dynamic rating is considered to be available for the efficient use of network under the deregulated environment. In this paper, the validity of the dynamic rating from the viewpoint of ATC is discussed, and also by considering the relationship between ATC with thermal constraints and weather conditions, ATC is estimated when the dynamic rating is applied to a power system.

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Section: Proposed Methodsmentioning

confidence: 99%

“…[7] This system is supposed to be composed of 2 regions, region A and region B, shown in Fig. 1, and the wheeling between the region A and B is considered in this paper.…”

Section: Proposed Methodsmentioning

confidence: 99%

Application of dynamic rating to evaluation of ATC with thermal constraints considering weather conditions

Miura

Satoh

Iwamoto

et al. 2006

2006 IEEE Power Engineering Society General Meeting

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“…Figure 1 represents a real low-voltage distribution network. In this use case, the objective function is to minimize three-phase voltage unbalance which can be seen in Equation (18). This objective can be realized in multiple ways and in this paper, reference balanced voltages are used.…”

Section: Three-phase Unbalance Minimizationmentioning

confidence: 99%

“…Load flow equations are represented as equality constraints. The authors in [18] have described an OPF method using reduced Hessian matrix with systematic constraint handling. It provides accurate solution, good convergence, and description about acceleration factor is provided.…”

Section: Introductionmentioning

confidence: 99%

Three-Phase Unbalanced Optimal Power Flow Using Holomorphic Embedding Load Flow Method

2019

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Distribution networks are typically unbalanced due to loads being unevenly distributed over the three phases and untransposed lines. Additionally, unbalance is further increased with high penetration of single-phased distributed generators. Load and optimal power flows, when applied to distribution networks, use models developed for transmission grids with limited modification. The performance of optimal power flow depends on external factors such as ambient temperature and irradiation, since they have strong influence on loads and distributed energy resources such as photo voltaic systems. To help mitigate the issues mentioned above, the authors present a novel class of optimal power flow algorithm which is applied to low-voltage distribution networks. It involves the use of a novel three-phase unbalanced holomorphic embedding load flow method in conjunction with a non-convex optimization method to obtain the optimal set-points based on a suitable objective function. This novel three-phase load flow method is benchmarked against the well-known power factory Newton-Raphson algorithm for various test networks. Mann-Whitney U test is performed for the voltage magnitude data generated by both methods and null hypothesis is accepted. A use case involving a real network in Austria and a method to generate optimal schedules for various controllable buses is provided.

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“…By other authors [4-71 linear and nonlinear programming and the reduced Hessian matrix [8] are used to solve the optimal power-flow problems. Wirgau et al [9] use Lagrange multipliers, penalty method and the fast decoupled method [lo] to cany the optimization of the power-flow problem.…”

Section: Introductionmentioning

confidence: 99%

Exact transformed decoupled optimal power flow

Ghoneim

Arini

Rumpel³

1991

Int Trans Elec Energy Syst

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In a recently published paper of the authors („On an Exact Transformed Decoupled Load Flow”︁: Electr. Power a. Energy Syst. 13 (1991) no. 1, pp. 28‐32) the method of an exact transformed decoupled power flow (ETD) was presented which can almost achieve the speed of a decoupled power‐flow computation while maintaining the benevolent performance of a Newton power flow in ill‐conditioned cases. The present paper introduces this method to an optimal power‐flow solution. It can be shown that a speed‐up of about the factor three is achieved as against a standard Dommel/Tinney version.

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An Improved Second Order Method for Optimal Load Flow

Cited by 27 publications

References 10 publications

Application of dynamic rating to evaluation of ATC with thermal constraints considering weather conditions

Application of dynamic rating to evaluation of ATC with thermal constraints considering weather conditions

Three-Phase Unbalanced Optimal Power Flow Using Holomorphic Embedding Load Flow Method

Exact transformed decoupled optimal power flow

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