Intelligent three-phase current balancing technique for single-phase load based on smart metering

Pasdar, Amir Mehdi; Mehne, Hamed Hashemi

doi:10.1016/j.ijepes.2010.11.019

Cited by 20 publications

(14 citation statements)

References 3 publications

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“…The research method petrogenetic thermodynamics intelligent simulation has the advantages of without being limited by the experimental conditions, and it is benefit to get more information of rock formation with such large data simulation, such as any mineral-composition and mineral-content under temperature-pressure conditions, etc. The foundation of rock forming minerals' thermodynamic database and the intelligent computer numerical simulation technology is widely used, and that makes the method of rock formation of thermodynamics intelligent calculation based on end-members activity calculation unprecedented applicate [10,11]. These theoretical calculation results are very close to the experimental results and the actual situation.…”

Section: Introductionsupporting

confidence: 54%

Thermodynamic research of jadeite jade at high temperatures and high pressures based on phase balance intelligent calculation

et al. 2019

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Original scientific paper https://doi.org/10.2298/TSCI181202155YBased on the thermodynamic calculation of chemical composition and the intelligent calculation of phase equilibria, the temperature-pressure of the diagenetic environment of Burma jadeite-jade was studied, and its metamorphism was verified. Firstly, the W kj value and activity of the four end-member of jadeite (Jd), augite (Acm), diopsite (Di), and hedenbergite (Hed) were calculated. Jadeite rock system was simplified as NCFMASH, and the equilibrium temperature-pressure conditions of both the combination of quartz and jadeite, sodium-feldspar with little kyanite, and the combination of jadeite diopside, hedenbergite, kyanite, sodium-tremolite, tremolite and oblique zoisite were revealed as 751 °C with 17.0 kb, and 631 °C with 18.8 kb. Based on the two kinds of mineral combination with a small amount of sodium mica [Pa], the balance of the system temperature should be in the range from 700-770 °C, and balanced pressure-range should be in the range from 17. 34-18.83 kb, which reflects the pure NCFMASH system hard rock type jadeite-jade rock formation of the real balance temperature-pressure range. It is concluded that the metamorphism of jadeite rock has a stable growth equilibrium temperature-pressure range, which is the reaction interval of the closed system NCTNASH. It is explained that the reason that synthetic jadeite-jade reaches the gem level is that it has not been simulated as a mineral assemblage in the later stage and it will be subjected to multi-phase dynamic metamorphism after the rock forms, so it is unreasonable that jadeite synthesize is not just from one mineral crystals.

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Section: Introductionsupporting

confidence: 54%

Thermodynamic research of jadeite jade at high temperatures and high pressures based on phase balance intelligent calculation

et al. 2019

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“…Belal Mohamadi Kalesar et al [17] Particle swarm optimization with minimizing power loss as objective function Easy to premature, and too many switching actions Mukwanga W et al [18] A heuristic method with minimizing power loss as objective function…”

Section: Type Author(s) Methods Effectiveness Analysismentioning

confidence: 99%

“…Mukwanga W et al [18] STS Higher precision and better reliability A. Pasdar et al [19] Relay Low cost…”

Section: Research On Phase-swapping Switchmentioning

confidence: 99%

“…In [17], a heuristic method of minimizing power loss as an objective function was proposed, and static transfer switches (STS) were used as a phase-swapping switch. In [18], an ant colony algorithm was designed with the objective function of minimizing unbalanced current, and a scheme of using relay as phase-swapping switch was proposed. From the research of a control algorithm and phase switching switch, the above literature have their own characteristics, which are summarized in Table 1.In order to reduce cost and improve reliability and visibility, this paper introduces a new LV three-phase unbalance solution.…”

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confidence: 99%

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Load Transfer Device for Solving a Three-Phase Unbalance Problem Under a Low-Voltage Distribution Network

Bao

2019

Energies

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In the low-voltage (LV) distribution network, a three-phase unbalance problem often exists. It does not only increase line loss but also threaten the safety of the distribution network. Therefore, the author designs a residential load transfer device for a LV distribution network that can deal with a three-phase unbalance problem by changing the connecting phase of the load. It consists of three parts: user controller for phase swapping, central controller for signal processing and monitoring platform for strategy calculation. This design was based on message queuing telemetry transport (MQTT) communication protocol, and Long Range and 4th Generation mobile telecommunications (LoRa + 4G) communication mode is used to realize the wireless connection between equipment and monitoring platform, and a control scheme is proposed. The improved multi-population genetic algorithm (IMPGA) with multi-objective is used to find the optimal swapping strategy, which is implemented on the monitoring platform. Then the phase swapping is realized by remote control, and the function of reducing three-phase unbalance is realized. The practical experimental result shows that the method can help to reduce the three-phase unbalance rate by changing the connection phase of the load, and the simulation results verify the effectiveness of the algorithm in the phase-swapping strategy.Energies 2019, 12, 2842 2 of 18 often unbalanced. Therefore, in order to protect equipment, ensure the quality of the power supply and reduce losses, an economic and effective solution is needed to solve the three-phase unbalance problem.In China, the LV feeders are usually three-phase four-wire systems, and have single-phase and three-phase power supply modes. In the LV distribution system, the main methods to reduce three-phase unbalance rate are power compensation and load transfer. However, although reactive power compensation can reduce the three-phase unbalance by increasing the power factor, when the three-phase unbalance is very serious, the reactive power compensation will not completely solve the three-phase unbalance problem [7], and reactive power compensation device need high cost [8]. The most direct and effective techniques to deal with the unbalanced distribution of load is to dynamically change the connection phase of single-phase users according to the unbalanced rate, so that the unbalanced rate of three-phase is within the prescribed range. Traditionally, the three-phase unbalance problem has been solved by manually to adjust the users' phase connection, but this method will cause the temporary power lose. And at the same time, due to the uncontrollable customer's power consumption, three-phase unbalance may occur in a short time. Therefore, manual adjustments require high labor costs and make the poor user experience.Power companies strive to innovate and add new elements of automation and intelligence to traditional distribution networks.[9] pointed out that the electric power distribution network is very complex, and not suitable for the...

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“…To achieve the needs for the sustained development of a nation, energy policies and relevant rules have been drawn up continually. Many researches on energy consumption analysis and energy-saving strategy have been presented [1][2][3][4][5][6][7][8][9]. Taiwan depends on imports for approximately 97.9% of primary energy.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of energy losses in Yuan Ze University campus

Yang

Tseng

2015

2015 IEEE 4th Global Conference on Consumer Electronics (GCCE)

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In this study, an energy loss analysis technique for campus distribution systems is proposed. For energy losses evaluations, the mathematical models of system components are established and verified. To examine the factors affecting energy losses of a distribution system, the full-scale digital models of distribution systems are developed as a platform. Furthermore, the continuous three-phase power flow is used to evaluate the whole system energy losses. In this study, the distribution systems in Yuan Ze University (YZU) are adopted as benchmarks for evaluating and solving energy loss problems.

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Intelligent three-phase current balancing technique for single-phase load based on smart metering

Cited by 20 publications

References 3 publications

Thermodynamic research of jadeite jade at high temperatures and high pressures based on phase balance intelligent calculation

Thermodynamic research of jadeite jade at high temperatures and high pressures based on phase balance intelligent calculation

Load Transfer Device for Solving a Three-Phase Unbalance Problem Under a Low-Voltage Distribution Network

Evaluation of energy losses in Yuan Ze University campus

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