Reactive compensator synthesis in time-domain

Siwczyński, M.; Jaraczewski, Marcin

doi:10.2478/v10175-012-0017-6

Cited by 6 publications

(5 citation statements)

References 1 publication

(1 reference statement)

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“…• LD -a load of power supply, connected to its DC output circuit. As a result of the compensation process, the total current drawn from the power grid node (i L ) should have both a suitable shape and a phase relation with the voltage in the power grid -depending on the compensation strategy [2][3][4][5][6]. In the case of this work, the power theory introduced by Fryze [6], was chosen for control of the compensation function of the device.…”

Section: Structure Of Power Supplymentioning

confidence: 99%

Bulletin of the Polish Academy of Sciences: Technical Sciences

Gwóźdź¹,

Wojciechowski²,

Ciepliński³

2021

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The paper is the second part of the work, devoted to a DC power supply with a power factor correction function. The power supply is equipped additionally with a shunt active power filter function, which enables the compensation of reactive and distortion power, generated by loads, connected to the same power grid node. A tunable inductive filter, included at the input of the power electronics current source -the main block of the power supply -allows for an improvement of the quality of the system control, compared to the device with a fixed inductive filter. This improvement was possible by extending the current source "frequency response", which facilitated increasing the dynamics of current changes at the power supply input. The second part of the work briefly reminds the reader of the principle of operation and the structures of both the power supply control system and its power stage. The main purpose of this paper is to present the selected test results of the laboratory model of the electric system with the power supply.

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Section: Structure Of Power Supplymentioning

confidence: 99%

Bulletin of the Polish Academy of Sciences: Technical Sciences

Gwóźdź¹,

Wojciechowski²,

Ciepliński³

2021

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“…In addition to the technical context, the impact of nonlinear loads should be considered in terms of purely economic and even social aspects, such as health [6]. Therefore, various types of "compensators", mainly passive [7,8] and active filters, including shunt and serial ones [9][10][11][12][13][14], are used in electrical systems as preventive measures. The main task of these devices is the appropriate matching of the shape of the current at its input to the shape of the current drawn from the same power grid node by other loads.…”

Section: Introductionmentioning

confidence: 99%

Bulletin of the Polish Academy of Sciences: Technical Sciences

Gwóźdź

Ciepliński

2021

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This paper presents a concept of a shunt active power filter, which is able to provide more precise mapping of its input current drawn from a power line in a reference signal, as compared to a typical filter solution. It can be achieved by means of an interconnection of two separate power electronics converters making, as a whole, a controlled current source, which mainly determines the quality of the shunt active filter operation. One of these power devices, the "auxiliary converter", corrects the total output current, being a sum of output currents of both converters, toward the reference signal. The rated output power of the auxiliary converter is much lower than the output power of the main one, while its frequency response is extended. Thanks to both these properties and the operation of the auxiliary converter in a continuous mode, pulse modulation components in the filter input current are minimized. Benefits of the filter are paid for by a relatively small increase in the complexity and cost of the system. The proposed solution can be especially attractive for devices with higher output power, where, due to dynamic power loss in power switches, a pulse modulation carrier frequency must be lowered, leading to the limitation of the "frequency response" of the converter. The concept of such a system was called the "hybrid converter topology". In the first part of the paper, the rules of operation of the active filter based on this topology are presented. Also, the results of comparative studies of filter simulation models based on both typical, i.e. single converter, and hybrid converter topologies, are discussed.

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“…As a result of the compensation process, understood in this way, the total current drawn from the power grid node should have both a suitable shape and phase relation with a voltage in the power grid -depending on a compensation strategy, e.g. [4][5][6][7]. A main disadvantage of these devices is related to the fact that they have only one specialized function in the power system.…”

Section: Introductionmentioning

confidence: 99%

Bulletin of the Polish Academy of Sciences: Technical Sciences

Gwóźdź¹,

Ciepliński²,

Krystkowiak³

2020

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The work presents a DC power supply with power factor correction (PFC). This device is also equipped with a parallel active filter function, which enables the possibility of compensation (minimization) of reactive and distortion power, generated by a group of loads, connected to the same power grid node. A passive filter with variable inductance applied at the input of the power supply allows for a significant improvement in quality of the system control (given specific criteria), as compared to the solution with a filter with fixed parameters. This is possible by increasing the dynamics of current changes at the power supply input (extending its "frequency response"). The paper presents the principle of operation as well as structures and models of the power supply control system and its power stage. Selected test results of the simulation model of the electric system with the power supply, in various operating conditions, are also presented.

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Reactive compensator synthesis in time-domain

Cited by 6 publications

References 1 publication

Bulletin of the Polish Academy of Sciences: Technical Sciences

Bulletin of the Polish Academy of Sciences: Technical Sciences

Bulletin of the Polish Academy of Sciences: Technical Sciences

Bulletin of the Polish Academy of Sciences: Technical Sciences

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