Reducing losses from current unbalance and improving electric-energy quality in 0.38-kV networks with municipal loads

Kosoukhov, Fedor D.; Васильев, Николай Валерьевич; Filippov, Anton O.

doi:10.3103/s106837121406008x

Cited by 13 publications

(9 citation statements)

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“…As is known, electricity losses in low-voltage distribution networks are caused by such main factors as: current and voltage unbalance [5,17]; unauthorized electricity consumption (theft) in PDNs [14,18]; nonlinear properties of loads of network consumers [17,19]; exceeded critical levels of wear of wires of backbone network lines. These factors cause the networks to deviate from their rated operating conditions.…”

Section: Structure and Tasks Of Conventional Asemmsmentioning

confidence: 99%

“…In this case, the quality of power deteriorates, and the probability of failure of household appliances and industrial plants increases. Some technologies [5,[21][22][23] proposed to solve the problem of voltage and current balancing in the distribution networks did not find wide practical application due to the complexity of their technical implementation. In particular, balancers with special transformers are practically not used in 0.4 kV networks, as they are the sources of technical electricity losses in networks, and they are rather expensive and complex engineering systems.…”

Section: Structure and Tasks Of Conventional Asemmsmentioning

confidence: 99%

“…The practice of their use has shown that they fail to adequately ensure the desired level of electricity losses, since these automated systems are mainly designed for electricity revenue metering. Analysis indicates that to significantly reduce electricity losses in the PDN it is necessary to additionally perform the optimization of operating conditions of facilities [5][6][7][8], diagnostics of critical states of distribution grids [9][10][11], including the identification of places of unauthorized consumption (theft) of electricity [12][13][14], and the monitoring of electricity losses [15,16] in real time. The existing (conventional) ASEMMs do not address this set of tasks.…”

Section: Introductionmentioning

confidence: 99%

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Development Issues of Systems for Automation and Digitalization of Power Distribution Networks

Omorov

Takyrbashev

Zakiriaev

et al. 2022

Energy Systems Research

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This paper studies 0.4 kV power distribution networks (PDNs) and automated systems for electricity monitoring and metering (ASEMM). As is known, a main task of ASEMMs is to digitalize PDNs, which is aimed at improving the efficiency and reliability of their operation. It is advisable that new models, methods, and intelligent technologies used for automation and informatization of distribution networks should also be focused on minimizing their power losses, which are currently fairly high and significantly compromise the technical and economic performance of automation systems employed and PDNs. Modern (conventional) ASEMMs, implemented at the facilities of utilities, do not have the appropriate technical, algorithmic, and software tools to reduce power losses in the PDN. This is due to the fact that conventional ASEMMs mainly collect remote data from the system meters and ensure their digital processing for the purpose of revenue metering of electricity. In this regard, the paper proposes methodological, algorithmic, and digital technologies to accomplish a set of new functional tasks in the conventional ASEMMs, aimed at reducing power losses in PDNs by optimizing their operating conditions.

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Section: Structure and Tasks Of Conventional Asemmsmentioning

confidence: 99%

Section: Structure and Tasks Of Conventional Asemmsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Development Issues of Systems for Automation and Digitalization of Power Distribution Networks

Omorov

Takyrbashev

Zakiriaev

et al. 2022

Energy Systems Research

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“…The latter lack tools designed to solve the problem of balancing three-phase distribution networks. At the same time, most of the 0.4 kV power distribution networks operate under current and voltage unbalance [3][4][5], which causes nonoptimal operating conditions. Unbalance of PDN results from unbalance of loads and their uneven distribution over phases of a three-phase network.…”

Section: Introductionmentioning

confidence: 99%

Digital Control of Electric Power Flows in Unbalanced Distribution Networks as Part of The Automated Metering and Control System

Omorov¹,

Takyrbashev

Zakiriaev

et al. 2021

Energy Systems Research

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This paper aims to address the problem of controlling the electricity flows in power distribution networks (PDN) operating under current and voltage unbalance. As is known, the unbalance factor is responsible for significant losses of active power and, therefore, is detrimental to the PDN efficiency and technical and economic performance. The purpose of control is to minimize technical power losses in the distribution network. This is to be achieved by building an information control system (ICS) for balancing a three-phase network as part of the automated metering and control system (AMCS). The latter is currently being widely adopted to automate information processes in PDNs. However, the AMCS does not include technologies for solving the problem in question. We propose an algorithm of the digital controller operation for the ICS. Its primary function is to maintain phase power at a given level in real-time. The algorithm concept is based on the idea of required redistribution of electricity flows between the phases of the distribution network by appropriately switching single-phase loads of consumers (users) to ensure a minimum spread of phase powers relative to their required level. To achieve the goal of control, we construct criterion functions that determine qualitative indices of the ICS operation and develop computational schemes for their minimization. Control actions to be generated by the digital controller and performed on the facility represent a digital code that contains data on the coordinates of three-phase network loads to be switched to another phase.

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“…In general, it should be noted, that in the framework of ASMAE, the tasks of commercial metering of electricity are being solved. At the same time, in order to increase the efficiency and intellectual level of automated systems, it is advisable to solve such important functional tasks as operational diagnostics of states [5][6][7] and optimization of operation modes of DEN [8][9][10]. Among the diagnostic tasks, it is especially important to identify the problem of identification and localization of breakage places of electric lines of a three-phase distribution network.…”

Section: Introductionmentioning

confidence: 99%

Identification of lines of electric lines of three-phase distribution networks in the composition of ASMAE

2017

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Abstract. The problem of protection of a three-phase four-wire distribution network (DEN) with a voltage of 0.4 kV from the interruption of electric power lines is considered. On the basis of the analysis of the values of complex resistances of interpersonal sections of the main line of the network, criteria are proposed that allow detecting critical situations associated with discontinuities in power transmission lines. Using these criteria makes it possible to localize the places of breaks of phase and neutral wires. Mathematical models and methods that are used to evaluate the complex resistances of interpersonal sections of a three-phase network are briefly considered. The obtained results are oriented for use in the automated system of electricity control and accounting (ASMAE).

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Reducing losses from current unbalance and improving electric-energy quality in 0.38-kV networks with municipal loads

Cited by 13 publications

References 0 publications

Development Issues of Systems for Automation and Digitalization of Power Distribution Networks

Development Issues of Systems for Automation and Digitalization of Power Distribution Networks

Digital Control of Electric Power Flows in Unbalanced Distribution Networks as Part of The Automated Metering and Control System

Identification of lines of electric lines of three-phase distribution networks in the composition of ASMAE

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