The capacitive-coupling grid-connected inverter (CGCI) is coupled to the point of common coupling via a second-order LC branch. Its operational voltage much lower than that conventional inductive-coupling (IGCI) when it serves as multifunctional compensate reactive power and transfer active simultaneously. It promising solution for microgrid building-integrated distributed generator systems. A quasi-proportional-resonant (quasi-PR) controller applied reduce steady-state current tracking...

This paper presents a novel adaptive dc-link voltage-controlled LC coupling hybrid active power filter (LC-HAPF) for reducing switching loss and noise under reactive compensation. First, the mathematical relationship between LC-HAPF voltage compensation range is deduced presented. Based on analysis, required minimum with respect to different loading deduced. Then, an controller three-phase four-wire proposed, in which as well can be adaptively changed according inductive situations....

This article presents a hysteresis pulse width modulation study for inductor-capacitor (LC)-coupling hybrid active power filter (HAPF). As the coupling LC impedance yields non-linear inverter current slope, this can affect controllability of using conventional control method and generate unexpected trigger signals to switching devices. results in deteriorating system operating performances. On basis proposed modelling, linearisation HAPF is firstly studied, investigated compared with linear...

This paper investigates different dc-link voltage control strategies in a three-phase four-wire LC coupling hybrid active power filter (LC -HAPF) for reactive compensation. By using direct current (current reference) pulsewidth modulation (PWM) method, to achieve self-charging function during -HAPF start-up process, the signal feedback as component is more effective than traditional method an component. However, when LC-HAPF performing dynamic compensation, this scheme will influence and...

This paper proposes an adaptive low-dc-link-voltage-controlled LC coupling hybrid active power filter ( LC-HAPF) with a neutral inductor, which can compensate both dynamic reactive and current harmonics in three-phase four-wire distribution systems. Due to its low-dc-link-voltage characteristic, it obtain the least switching loss noise best compensating performances, compared conventional fixed newly dc-voltage-controlled LC-HAPFs. The design procedures of dc-link voltage controller are...

This paper proposes a hybrid static synchronous compensator (hybrid-STATCOM) in three-phase power transmission system that has wide compensation range and low dc-link voltage. Because of these prominent characteristics, the costs can be greatly reduced. In this paper, circuit configuration hybrid-STATCOM is introduced first. Its V-I characteristic then analyzed, discussed, compared with traditional STATCOM capacitive-coupled (C-STATCOM). The parameter design proposed on basis consideration...

This article proposes a single-stage inductive-power-transfer (IPT) converter operating as wireless constant-power (CP) and maximum-efficiency battery charger. By maintaining constant output power rather than providing current throughout the dominant stage of charging, IPT can make utmost its capability, thus having faster charging rate. The proposed adopts series-series compensation includes switch-controlled capacitor (SCC) semiactive rectifier (SAR) in secondary side. Manipulating SCC SAR...

To improve the battery-charging rate while alleviating its aging problem, it is important to vitalize constant power (CP) charging with respect traditional current charging. Herein, a single-stage inductive-power-transfer converter proposed for both wireless CP and optimal transfer efficiency. Specifically, this system adopts an inductor–capacitor–capacitor-series ( <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">LCC</i> -S) compensation...

Cophase traction power system has high potential to be supply for high-speed railway. However, the dc operation voltage of conventional quality compensation device within, such as railway conditioner, is and may limit its application development. The hybrid conditioner (HPQC), in which a capacitive coupled LC structure added, thus proposed lower voltage. there less investigation study on HPQC parameter design minimum when harmonic concerned. In this paper, under comprehensive fundamental...

In this paper, an adaptive dc-link voltage controlled thyristor-controlled LC-coupling hybrid active power filter (TCLC-HAPF) is proposed for reducing switching loss, noise, and enhancing the compensating performance. Unfortunately, TCLC-HAPF has both controllable TCLC part inverter part; thus, conventional minimum calculation methods (APF) APF (LC-HAPF) cannot be directly applied to TCLC-HAPF. Moreover, aforementioned were developed based on fast Fourier transform (FFT), which makes...

In this paper, the structure, modeling, parameter design, and control method are proposed for a new hybrid structure of static var compensator in parallel with active power filter (SVC//HAPF). The SVC part SVC//HAPF is used to dynamically compensate reactive power. And, HAPF provide harmonic small amount compensation. Due large fundamental voltage drop on coupling LC part, inverter has low rating. Meanwhile, parallel-connected acts as current divider reduce current. Therefore, shows great...

This paper proposes a control strategy for three-phase three-wire thyristor-controlled LC -coupling hybrid active power filter (TCLC-HAPF), which can balance and compensate reactive harmonic currents under unbalanced loading. Compared with TCLC-HAPF conventional strategy, filters either fail to perform satisfactory compensation or require high-rating inverter part compensation, was proposed operate small rating variety of loads performance. The idea is provide different firing angles each...

In this article, a second-order sliding-mode control (SOSMC) based on supertwisting controller for LC-coupling hybrid active power filter (LC-HAPF) is proposed. Among the literatures review studies, hysteresis-based current controller, which special implementation of control, usually used due to its simplicity, robustness, and good dynamic performance reference tracking. However, it generates nonfixed switching frequency filter, leads undesirable harmonics problem. The proposed SOSMC ensures...

The hybrid static synchronous compensator (hybrid-STATCOM) is characterized by a wide compensation range and low dc-link voltage, which cost-effective reactive power for medium voltage level application. However, the coupling part of hybrid-STATCOM time-varying, its system model nonlinear, causes great challenge controller design. This letter proposes model-free reinforcement learning (RL) based sliding mode control (RL-SMC), provides inverter as action to compensate load harmonic. proposed...

Voltage swell and overvoltage compensation problems in a diode-bridge rectifier supported transformerless-coupled dynamic voltage restorer (DVR) are discussed. When or happens, applying conventional in-phase phase-invariant boosting method causes rapid rise dc-link voltage, which may damage the storage capacitors switching devices, increase loss. This paper illustrates inability of minimum energy injection scheme to solve these during unbalanced situations. Therefore, we propose novel...

Hybrid Railway Power Quality Conditioner (HPQC) is newly proposed for its effective reduction in dc-link operation voltage while providing similar power quality compensation cophase traction supply compared to conventional railway conditioner. However, HPQC limits capability. For instance, the previously design based on minimum under fixed rated load has Under practical conditions when varies, required active and reactive also changes. The of may therefore need be enhanced increase Therefore...

This paper proposes a new type dc/ac inverter named: hybrid-coupling grid-connected (HGCI) for photovoltaic active power generation with quality conditioning, which consists of full-bridge three-phase coupling to the grid in series thyristor-controlled LC filter. Compared conventional inductive-coupling (IGCI) and capacitive-coupling (CGCI), proposed HGCI has distinct characteristics wide operational range low dc-link operating voltage. Based on these prominent characteristics, system cost...

When the load generated harmonic, unbalanced, and reactive power is beyond limited capacity of a thyristor-controlled LC-coupling hybrid active filter (TCLC-HAPF), TCLC-HAPF with conventional control methods cannot provide satisfactory compensation performance. In this paper, selective method harmonic distortion, unbalanced proposed, which can function even at different voltage conditions (e.g., dip, fault, etc.). First, proposed decomposes into fundamental positive-sequence power,...

Pulse‐width modulations (PWMs) are widely investigated in active power filter (APF) applications. However, there seldom PWMs proposed hybrid APF (HAPF) applications because of their non‐linear current characteristic. This study proposes a adaptive hysteresis band PWM controller for HAPFs to reduce the switching loss and keep total harmonic distortion (THD) at an acceptable level. In contrast previous studies, as coupling LC impendence HAPF can yield compensating current, quasi‐linear regions...

In this paper, the structure, coordinate control method, and parameter design of a hybrid system are proposed for active power injection nonactive (reactive, harmonic, unbalance power) compensation. The consists static var compensator (SVC) in parallel with capacitive-coupling grid-connected inverter (CGCI) (SVC//CGCI). SVC//CGCI, SVC part is used to dynamic compensate reactive power, while low rating CGCI inject provide harmonic fixed amount capacitive power. Compared conventional...

This paper presents a thyristor controlled LC (TCLC) compensator for dynamic reactive power compensation in smart grid system. Compared with the traditional static var compensators like fixed capacitor-thyristor reactor (FC-TCR) which generates low order harmonic currents, proposed TCLC can significantly mitigate injection of currents. In this paper, design parameters is investigated considerations its range and currents rejection. And control method based on generalized instantaneous theory...

An ultra-low quiescent current dual-mode buck converter system is designed for IoT application, which includes a double clock time (DCT) and pulse-width-modulation (PWM) control modes. The proposed DCT mode can reduce the conversion loss over wide loading range from nA-to-mA achieve seamless transition to PWM control. Implemented in 0.18μm CMOS, this achieves peak efficiency of 92.7%/94.7% DCT/PWM >80% 10 μ A 50 mA (5000x), with input voltage 2 V 5 V. 470 nA including bandgap reference...

Compared with the conventional active power filter, thyristor-controlled <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">LC</i> -coupling hybrid filter (TC -HAPF) has a distinct characteristics of low dc-link operating voltage, which can lower system and operational costs in medium-voltage-level system. It also wider range than filter. Besides that, TC -HAPF provide reactive, harmonic, unbalanced powers compensation simultaneously. In this...

With the advances in massive computing ability and big data science, deep neural network (DNN) has been developing rapidly for different applications. However, due to its extensive computation memory usage requirements, it calls design of an energy-efficient DNN accelerator with a high potential implementation on low-end devices. Moreover, depthwise separable convolution (DSC) layer can reduce complexity while sustaining classification accuracy. In this brief, we propose energy-efficient,...

A finite-set model predictive control (FS-MPC) with coupling capacitor voltage observer scheme is proposed for thyristor-controlled <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">LC</i> -coupling hybrid active power filter (TC -HAPF) in this article. It ensures the fast transient response, low steady-state error, and good robustness under both inductive capacitive load situations. Generally, implementation of FS-MPC TC -HAPF requires sensing...