A method for minimization of unbalanced mode in three-phase power systems

Korovkin, Nikolay; Vu, Q. S.; Yazenin, R. A.

doi:10.1109/eiconrusnw.2016.7448257

Cited by 6 publications

(2 citation statements)

References 9 publications

(7 reference statements)

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“…Assuming that, we disconnect the compensator (z-Ohm) out of the circuit, which was in parallel, it means z → ∞, then, ( ) the same for the currents and in the case of compensators are connected in series. Thus, in this section, we show how we got the fractional-polynomial functions [22][23][24][25][26][27].…”

Section: Other Cases Of Fractional-polynomial Functionsmentioning

confidence: 99%

Novel dependencies of currents and voltages in power system steady state mode on regulable parameters of three-phase systems symmetrization

Tin

Tran

et al. 2020

TELKOMNIKA

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The unbalanced mode, negative/zero sequence, variation of real power are caused by the nonlinear or unbalanced loads increase the power transmission losses in distributing power systems and also harmful to the electric devices. Reactive power compensation is considered as the common methods for overcoming asymmetry. The critical issue in reactive power compensation is the optimal calculation of compensation values that is extremely difficult in complex circuits. We proposed a novel approach to overcome these difficulties by providing the creation of new analytical connections of the steady-state mode parameters (voltages, currents) depends on the controlled parameter for the arbitrary circuits. The base of our approach to reactive power compensation is the fractional-polynomial functions. We present a new description of the behavior of voltages and currents depending on the controlled parameters of the reactive power compensation devices, and we prove its effectiveness.

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Section: Other Cases Of Fractional-polynomial Functionsmentioning

confidence: 99%

Novel dependencies of currents and voltages in power system steady state mode on regulable parameters of three-phase systems symmetrization

Tin

Tran

et al. 2020

TELKOMNIKA

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“…Various methods have been presented in the literature to minimize three-phase unbalance. In [47], a method to minimize three-phase unbalance is presented. Reactive power compensation is performed using flexible AC transmission system (FACTS) devices to minimize the three-phase unbalance.…”

Section: Three-phase Unbalance Minimizationmentioning

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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Fast algorithm for obtaining mathematical relations for optimizing the operating mode of an electric power system

Dolbin

2024

E3S Web Conf.

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The article proposes a method for composing mathematicalexpressions by which it is possible to reduce the time for determining theparameters of flexible alternating current transmission system devices inthe operating mode of the electric power system. The problem of quasistationarityof the steady-state regime is considered, taking into account therapidity of its change. Criteria for the optimality of the regime are also putforward. The problem of optimizing the power system mode is solved byrecording various sets of target functions. The article provides in detail analgorithm for obtaining objective functions based on the theory ofsensitivity of electrical circuits. A method is also proposed for determiningthe success of choosing functional relationships and the optimal location ofdevices.

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A method for minimization of unbalanced mode in three-phase power systems

Cited by 6 publications

References 9 publications

Novel dependencies of currents and voltages in power system steady state mode on regulable parameters of three-phase systems symmetrization

Novel dependencies of currents and voltages in power system steady state mode on regulable parameters of three-phase systems symmetrization

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

Fast algorithm for obtaining mathematical relations for optimizing the operating mode of an electric power system

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