A Hybrid Active Var Compensator (HAVarC)

Silva, Carlos Henrique da; Pereira, Rondineli Rodrigues; Silva, Luiz E. Borges da; Torres, Germano Lambert; Gonzatti, Robson Bauwelz

doi:10.1109/ichqp.2010.5625341

Cited by 8 publications

(5 citation statements)

References 14 publications

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“…We particularly focus our investigation on iron core devices used in LV power factor correction (PFC) units for variable capacitive loads. These particular loads are usually caused by the presence of power electronic converters [28,29]. Figure 2 illustrate the basic principle of PFC equipments in which the reactors are switched-on by a control and command block that continuously monitors the network line parameters.…”

Section: Numerical Results -Case Studymentioning

confidence: 99%

Magnetising inrush current of low-voltage iron core three phase power reactors

Cazacu

Petrescu

2014

2014 16th International Conference on Harmonics and Quality of Power (ICHQP)

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The paper presents the quantitative evaluation of the magnetizing inrush current initiated at the connection instant of various three phase iron core reactors to a low-voltage power network. An analytical approach is adopted, which bases on the ferromagnetic coils circuit model and its time domain transient characterization. Thus, the solutions of the corresponding nonlinear differential equation system allow extracting the main inrush current features: waveform signature, amplitude and duration. The major power quality issues generated by the three phase reactors energizing process are also investigated and additionally some inrush current mitigation techniques are suggested.

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Section: Numerical Results -Case Studymentioning

confidence: 99%

Magnetising inrush current of low-voltage iron core three phase power reactors

Cazacu

Petrescu

2014

2014 16th International Conference on Harmonics and Quality of Power (ICHQP)

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“…Also, it creates a "virtual resistance" (-r a ), as in (6), to eliminate the residual resistance of the branch and strongly improve the quality factor of the hybrid filter. (6) These two concepts, virtual resistance r a and active inductance L a , together compose the so-called active impedance.…”

Section: Active Impedance Principlementioning

confidence: 99%

“…As a result, the new topology can be electronically tuned to filter multiple harmonic frequencies and, when applied to fundamental frequency, it behaves also as a Var compensator [6]. Conceptually, the hybrid branch, conceived in this way, can be defined as a Smart Impedance [5].…”

Section: Introductionmentioning

confidence: 99%

PLL-less control for hybrid active impedance

Gonzatti

Ferreira

Silva

et al. 2013

2013 Twenty-Eighth Annual IEEE Applied Power Electronics Conference and Exposition (APEC)

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This work describes a PLL-Less control algorithm for the hybrid topology composed by a capacitor bank in series with an active impedance. This topology, named Smart Impedance, can be used in many applications. Hybrid Active Power Filter is one of these applications, where selective or simultaneous compensation of multiple harmonic components is possible. The control strategy uses the Proportional Resonant Compensators technique to achieve the desired behavior. The proposed algorithm totally eliminates the need for voltage synchronization as the resonant controller keeps track of the system current without the call for a PLL. The control algorithm is performed directly in the abc frame and practical results are presented to demonstrate the control performance and dynamics.

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“…Рис. Авторами [4][5][6][7] запропоновано топологію і систему управління ГКРП, проте у конфігурації фільтра використані нерегульовані БК встановленої потужності, що збільшує потужність активної частини, отже, погіршує техніко-економічні показники системи. У роботах [5][6][7] розглянуті системи управління компенсатором, які не передбачають роботу пристрою в умовах несиметрії напруги живлення, які можуть бути викликані нерівномірним розподілом навантажень по фазах, підключенням однофазних приймачів і неповнофазним режимом роботи елементів мережі.…”

Section: вісник приазовського державного технічного університету 2022рunclassified

Hybrid VAR compensator operating study under conditions of a three-wire network

Savenko¹

2022

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The approaches to the control of the hybrid VAR compensator are considered. A hybrid VAR compensator is a passive and active compensator connected in series. The passive part is represented by a thyristor-switched capacitor bank. The power part of the active part is implemented on the basis of an autonomous voltage inverter, connected through a voltage transformer in series with a passive part. Most of the reactive power is compensated by means of the compensator’s passive part. The hybrid compensator combines the advantages of passive (low price, reliability) and active compensators (possibility of smooth control of reactive power, operation in networks with non-sinusoidal currents). This configuration allows to significantly reduce the rated power of the active part, while maintaining the possibility of smooth control of the reactive power. Mathematical modeling of the hybrid system operation in a three-wire network is carried out. Two operating modes are checked: the reactive power compensation mode and the mode of providing the sinusoidal waveform of the network current. The first mode provides fundamental reactive power compensation only (the compensator current is sinusoidal, therefore, provides «insulation» of capacitor bank from higher harmonics) and the second mode provides limitedly non-active power compensation, including distortion power (overvoltages and exceeding the permissible currents of the capacitor bank are not allowed). When choosing a control strategy, the network configuration and the real requirements of power consumers for power quality indicators are taken into account. The efficiency of the proposed model under conditions of non-sinusoidal load current and unbalance of the main’s voltage is provided

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A Hybrid Active Var Compensator (HAVarC)

Cited by 8 publications

References 14 publications

Magnetising inrush current of low-voltage iron core three phase power reactors

Magnetising inrush current of low-voltage iron core three phase power reactors

PLL-less control for hybrid active impedance

Hybrid VAR compensator operating study under conditions of a three-wire network

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