Dynamic intelligent load balancing in power distribution networks

Zdraveski, Vladimir; Todorovski, Mirko; Kocarev, Ljupčo

doi:10.1016/j.ijepes.2015.05.012

Cited by 18 publications

(8 citation statements)

References 14 publications

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“…• λ j : Maximum percentage of the total power supplied by phase j during all periods. Note that Equation (12) shows the situation in each phase, since λ j B k corresponds to the percentage of total power assigned to one phase. These equations fulfill the power boundaries for each phase in each given period and during the whole analysis time.…”

Section: Problem Formulationmentioning

confidence: 99%

Historical Load Balance in Distribution Systems Using the Branch and Bound Algorithm

et al. 2019

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One of the biggest problems with distribution systems correspond to the load unbalance created by power demand of customers. This becomes a difficult task to solve with conventional methods. Therefore, this paper uses integer linear programming and Branch and Bound algorithm to balance the loads in the three phases of the distribution system, employing stored data of power demand. Results show that the method helps to decrease the unbalance factor in more than 10%, by selecting the phase where a load should be connected. The solution may be used as a planning tool in distribution systems applied to installations with systems for measuring power consumption in different time intervals. Furthermore, in conjunction with communications and processing technologies, the solution could be useful to implement with a smart grid.

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Section: Problem Formulationmentioning

confidence: 99%

Historical Load Balance in Distribution Systems Using the Branch and Bound Algorithm

et al. 2019

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“…Electricity distribution networks (DN) encounter constantly changing generation demands and/or high load fluctuations from low to high, and vice versa. These problems are common for electricity distribution networks [1]. Voltage drop is among the most important energy quality issues and concerns users connected to low voltage distribution grids [2].…”

Section: Introductionmentioning

confidence: 99%

“…Even though, during the equipment installation, the load is distributed among the three phases equally, the load gain and the changing demand throughout the day cause the occurrence of the phase load imbalance. For a certain period of time, the phase load in a three-phase network is distributed evenly, however, after a while, the load imbalance occurs [1]. A power-load curve changing in time is the basis of the load distribution and the programming of the electricity distribution system.…”

Section: Introductionmentioning

confidence: 99%

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Review of Voltage and Reactive Power Control Algorithms in Electrical Distribution Networks

Stanelytė

Radziukynas

2019

Energies

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The traditional unidirectional, passive distribution power grids are rapidly developing into bidirectional, interactive, multi-coordinated smart grids that cover distributed power generation along with advanced information communications and electronic power technologies. To better integrate the use of renewable energy resources into the grid, to improve the voltage stability of distribution grids, to improve the grid protection and to reduce harmonics, one needs to select and control devices with adjustable reactive power (capacitor batteries, transformers, and reactors) and provide certain solutions so that the photovoltaic (PV) converters maintain due to voltage. Conventional compensation methods are no longer appropriate, thus developing measures are necessary that would ensure local reactive and harmonic compensation in case an energy quality problem happens in the low voltage distribution grid. Compared to the centralized methods, artificial intelligence (heuristic) methods are able to distribute computing and communication tasks among control devices.

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“…Town mains of 0.38 kV voltage are among the more unbalanced three-phase networks. Unbalanced conditions are principally caused by the load unbalance of power consumers and the element unbalance of electrical networks [5]. The current and voltage unbalance is shown in Figure 1.…”

Section: Introductionmentioning

confidence: 99%

Unbalance Level Regulating Algorithm in Power Distribution Networks

Shutov¹,

Turukina²,

Elfimov³

2018

EPE

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The paper dwells on the unified power quality indexes characterizing the phenomenon of voltage unbalance in three-phase systems. Voltage unbalance is one of the commonest occurrences in the town mains of 0.38 kV voltage. The phenomenon describes as inequality of vector magnitude of phase voltage and shearing angle between them. Causes and consequences of the voltage unbalance in distribution networks have been considered. The algorithm, which allows switching one-phase load, has been developed as one of the methods of reducing the unbalance level. The algorithm is written in the function block diagram programming language. For determining the duration and magnitude of the unbalance level it is proposed to introduce the forecasting algorithm. The necessary data for forecasting are accumulated in the course of the algorithm based on the Function Block Diagram. The algorithm example is given for transforming substation of the urban electrical power supply system. The results of the economic efficiency assessment of the algorithm implementation are shown in conclusion. The use of automatic switching of the one-phase load for explored substation allows reducing energy losses (active electric energy by 7.63%; reactive energy by 8.37%). It also allows improving supply quality to a consumer. For explored substation the average zero-sequence unbalance factor has dropped from 3.59% to 2.13%, and the negative-sequence unbalance factor has dropped from 0.61% to 0.36%.

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Dynamic intelligent load balancing in power distribution networks

Cited by 18 publications

References 14 publications

Historical Load Balance in Distribution Systems Using the Branch and Bound Algorithm

Historical Load Balance in Distribution Systems Using the Branch and Bound Algorithm

Review of Voltage and Reactive Power Control Algorithms in Electrical Distribution Networks

Unbalance Level Regulating Algorithm in Power Distribution Networks

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