Conductance-controlled global-compensation-type shunt active power filter

Szromba, Andrzej

doi:10.1515/aee-2015-0022

Cited by 6 publications

(8 citation statements)

References 16 publications

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“…us, it is necessary to study the e ect of control delay on the tracking performance of the current loop. e delay of the digital control is generally 1.5 times of the sample period Ts [21], and the transfer function can be expressed as…”

Section: E In Uence Of Digital Controlmentioning

confidence: 99%

Shunt Active Power Filter Based on Proportional Integral and Multi Vector Resonant Controllers for Compensating Nonlinear Loads

Zhang

Xie

et al. 2018

Journal of Electrical and Computer Engineering

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e current tracking control strategy determines the compensation performance of shunt active power filter (SAPF). Due to inadequate compensation of the main harmonic by traditional proportional integral (PI) control, a control algorithm based on PI and multi vector resonant (VR) controllers is proposed to control SAPF. e mathematical model of SAPF is built, and basic principle of VR controller is introduced. Under the synchronous reference frame, the proposed control method based on pole zero cancellation is designed, which narrows the order of the control system and improves the system dynamic response and the control accuracy. en the feasibility of the method is demonstrated by analyzing the closed loop frequency characteristics of the system. Finally, the simulation and experimental results are carried out to verify the performance of the proposed method.

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Section: E In Uence Of Digital Controlmentioning

confidence: 99%

Shunt Active Power Filter Based on Proportional Integral and Multi Vector Resonant Controllers for Compensating Nonlinear Loads

Zhang

Xie

et al. 2018

Journal of Electrical and Computer Engineering

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“…For the variable load, the transmitting mode and the storing mode can be exploited with an additional possibility of smoothing the supply source power. This possibility can be implemented by introducing controlled inertia to the active filter action (Szromba, 2015). A similar problem, but using an additional DC-DC converter, is discussed by Sowa et al (2016).…”

Section: Energy Flow Conditioningmentioning

confidence: 99%

“…Because the load can be pure resistive or not, linear or not, time invariant or not, of single- or polyphase structure, balanced or not – the problem of a homogeneous method of calculating the load-equivalent conductance as the signal used to obtain the reference current [equation (1)] has arisen. In this context, a new general formula for active filters control has been proposed by Szromba (2015): where: g ( t ) is the instantaneous conductance signal; W AF 0 is the initial energy stored in an active filter’s reactance elements; w AF ( t ) is the energy stored in these elements at instant t ; N SF is the ratio of source-to-active filter energy, which is delivered to the load between the instant of change of the load-active power and this is achieved by the active filter in the steady state; T st is a user-dependent parameter equal to the time needed to reach the active filter in the steady state after a change in the load-active power; and UΣ2=∑nUn2 is the equivalent polyphase source voltage, where Un is the root mean square (rms) of phase n voltage.…”

Section: Introductionmentioning

confidence: 99%

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Three-phase four-wire shunt active power filter working simultaneously as energy conditioner

Szromba

2017

COMPEL

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Purpose The purpose of this study is to find a control method for three-phase four-wire shunt active power filters, which uses a load-equivalent conductance for obtaining a reference signal for compensating non-active current. Design/methodology/approach Changes of energy stored in an active filter’s reactance elements are monitored to find the active component of the load current. It is then used as a current reference to be realised as a supply source current. Computer simulation methods were used to verify the presented control method. Findings To calculate the reference signal for the active filter action, it is enough to measure the active filter’s DC-side capacitors’ voltages. It has been proved that P regulators are sufficient to realise compensating current and to stabilise active filter capacitors’ voltages. The supply source-neutral conductor current can be zeroed even for nonlinear and unbalanced load-generating DC-component in its neutral conductor. In addition, the active filter can buffer load-active power changes and act simultaneously as a local energy accumulator. Originality/value This paper provides an alternative approach to address the problem of the three-phase four-wire shunt active power filter control methods.

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“…Such control methods are known as direct control techniques. However, UPQC can be steered using a somewhat different scenario, which may be classified as the indirect control method [8][9][10][11][12]. A type of the indirect method, which has been dubbed the conductance signal control method, has been successfully implemented to control the shunt active power filter (SAPF) action [9].…”

Section: Introductionmentioning

confidence: 99%

The Unified Power Quality Conditioner Control Method Based on the Equivalent Conductance Signals of the Compensated Load

Szromba

2020

Energies

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This paper proposes a new control method for a Unified Power Quality Conditioner (UPQC). This method is based on the load equivalent conductance approach, originally proposed by Fryze. It can be useful not only for compensation for nonactive current and for improving voltage quality, but it also allows one to perform some unconventional functions. This control method can be performed by extending the orthodox notion of ‘static’ load equivalent conductance into a time-variable signal. It may be used to characterize energy changes in the whole UPQC-and-load circuitry. The UPQC can regulate energy flow between all sources and loads being under compensation. They may be located as well for UPQC’s AC-side as DC-side. System works properly even if they switch their activity to work either as loads or generators. The UPQC can operate also as a buffer, which can store/share the in-load generated energy amongst other loads, or it can transmit this energy to the source. Therefore, in addition to performing the UPQC’s conventional compensation tasks, it can also serve as a local energy distribution center.

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Conductance-controlled global-compensation-type shunt active power filter

Cited by 6 publications

References 16 publications

Shunt Active Power Filter Based on Proportional Integral and Multi Vector Resonant Controllers for Compensating Nonlinear Loads

Shunt Active Power Filter Based on Proportional Integral and Multi Vector Resonant Controllers for Compensating Nonlinear Loads

Three-phase four-wire shunt active power filter working simultaneously as energy conditioner

The Unified Power Quality Conditioner Control Method Based on the Equivalent Conductance Signals of the Compensated Load

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