Estimation of Power Losses in Electric Devices of the Electrotechnical Complex

Gracheva, Elena; Naumov, Oleg V.

doi:10.1109/icieam.2019.8742923

Cited by 41 publications

(13 citation statements)

References 3 publications

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“…The relay consists of a contact system with four switching contacts mounted on a single plastic base. The criteria for assessing the technical state of contact groups are considered in [12][13][14][15][16]. An electromagnetic system is also installed there.…”

Section: Discussionmentioning

confidence: 99%

Analysis of small intermediate relays from leading manufacturers

et al. 2020

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This paper presents a comparative analysis of technical characteristics and designs of small intermediate relays from various manufacturers. The following main characteristics of relay are considered: operation and release values; weight and dimensions; power consumption; time parameters; reliability characteristics. The design of the relays of the Russian and international manufacturers are being discussed, their design features that affect the technical characteristics are considered. It is noted that the fastening of movable contacts directly to the armature (relays from Finder, Relpol, Irkutsk Relay Plant) requires a flexible connection with the relay contacts, which leads to more complicated assembly and calibration of relays. It is shown that the kinematic diagram in the presence of free travel with no mechanical coupling with the contact pusher, used in the relay from Schrack, can reduce power consumption and increase the vibration and shock resistance of the relay break contacts. In Schrack AC relays, the operating clearance zone is configured to create a short-circuited loop with reduced electrical resistance and to provide optimum conditions for reducing armature vibration. The appropriate relay designs in terms of improving technical characteristics are proposed. The advantage of a flat return spring over cylindrical coil springs in terms of manufacturing technology and stability of mechanical characteristics of relay is shown. It was revealed that the electromagnetic drive of the Schrack relay compares favorably with electromagnetic drives of other companies in terms of the use of stray magnetic fluxes to create a useful electromagnetic torque. Based on the results of the comparative analysis and experimental study of existing relay designs, recommendations were formulated for the development of a new series of the Russian small intermediate relays within the framework of the import substitution program.

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Section: Discussionmentioning

confidence: 99%

Analysis of small intermediate relays from leading manufacturers

et al. 2020

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“…Studies of different authors [2][3][4][5][6] made it possible to reveal signs that allow remote control of the operation results of the distribution network circuit-breakers. The analysis of statistical data on changes in current rush during typical time intervals gave a complete visual picture of the occurring processes and was the initial necessary material for the development of remote control methods.…”

Section: Theoretical Researchmentioning

confidence: 99%

Improvement of power supply reliability by means of remote control of the automatic repeated switching-on of sectionalizing circuit-breakers

Fomin¹,

Belikov²,

Zelyukin³

et al. 2019

E3S Web Conf.

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An important direction in improving the technical and economic level of technologies and agricultural production machinery is to ensure high reliability of power supply. Power interruptions cause damage to both agricultural consumers and power supply organizations. Therefore, obtaining on-line information about the occurrence of emergency operating conditions, and, therefore, minimizing the time for making operational decisions on their elimination, is an urgent task. Known methods and technical control means are complex, expensive and not effective enough. At the same time, they have both advantages and disadvantages. In this respect, it is very important to work out efficient technical means of remote control of power line sectionalizing circuit-breakers of the agro-industrial complex on the basis of innovative methods of monitoring. The proposed control method is implemented in a device for remote control of the overhead line circuit-breaker operation based on an analog-to-digital converter, with subsequent software-based processing of the received data on a computer. This method implementation of circuit breaker opening remote control will improve power supply reliability of agricultural consumers.

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“…Autonomous and distributed power systems are one of the ways to improve the efficiency of power supply to remote facilities. They are especially relevant for energy supply of consumers of small unit capacity located at a considerable distance from each other [1][2][3]. In this case, the laying and operation of power transmission lines and related infrastructure require significant costs and leads to a significant increase in the cost of supplied electricity.…”

Section: Introductionmentioning

confidence: 99%

High speed power generator for low power steam turbine

et al. 2020

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The paper discusses the issues of creating a high-speed power generator for a low-power steam turbine. A 50 kW power generator with a rated speed of 12,000 rpm was developed. The influence of control parameters on the power generator performance was analyzed. The electromagnetic processes in the power generator were mathematically modeled. For the single-pulse control algorithm used in the generation mode, rational ratios of the angles of the beginning and end of the voltage pulse were established. The analysis of the obtained results shows that the developed power generator meets the set requirements for joint operation with a steam turbine. The choice of a valve-inductor machine for this purpose makes it possible to significantly simplify the design, reduce the costs of production and improves the reliability of the system as a whole. The peculiarities of the implementation of control algorithms make it possible to use a minimum number of sensors and not to use the rotor position sensor.

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Estimation of Power Losses in Electric Devices of the Electrotechnical Complex

Cited by 41 publications

References 3 publications

Analysis of small intermediate relays from leading manufacturers

Analysis of small intermediate relays from leading manufacturers

Improvement of power supply reliability by means of remote control of the automatic repeated switching-on of sectionalizing circuit-breakers

High speed power generator for low power steam turbine

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