Solar energy is under push to reach "grid parity" without additional subsidies and favorable policies. While cost reliability are major concerns for both photovoltaic (PV) panels PV inverters, comparable or exceeded grid functions power quality can further help solar become competitive conventional generation technologies in the wholesale electricity market. This paper gives an overview of future development trends inverters proposes new requirements next smart and/or microgrid environments....

This paper proposes a self-sustained and flexible control strategy for autonomous dc nanogrids (NGs) in remote rural areas without the need communication system. The proposed of NGs is based upon hierarchical control, which primary manages power balance inside NG secondary responsible removing deviation bus voltage caused by droop operation. state charge battery external signal are taken into account order to avoid overcharge/deep discharge as well collapse bus. Bidirectional flow among...

For utility-scale photovoltaic (PV) power plants, the trend goes towards larger installations with reduced levelized costs of electricity. Further cost reductions can be achieved by modular and redundant inverter topologies, which enable higher reliabilities a better overall system availability. In this paper, comparative evaluation selected three-phase single-and multi-stage voltage source inverters rated 50kW for PV plants is presented. Based on detailed loss, volume thermal models,...

In this article issues related to mathematical modelling of a three-phase common mode choke (CMC) are presented. Influence the CMC characteristics on electromagnetic interference (EMI) filter insertion losses is investigated. A novel behavioural model including saturation and non-linear permeability effects in frequency domain proposed. Those two phenomena considered simultaneously proposed model. The magnetic hysteresis based function, describing dependency between current inductance...

In this article, a high-frequency (HF) six-port delta- and star-connected three-phase induction motor model is proposed. The consists of multistage RLC circuits, which include the mutual inductances between phases. HF derived from common-mode (CM) differential-mode (DM) equivalent are extracted CM DM measurements on motor. A methodology developed to consider nonlinear inductance effect in low-frequency (LF) range. per-phase circuit symmetric concerning begin end points. This symmetry allows...

The modular multilevel converter (MMC) has become one of the most attractive converters for high-power applications such as high-voltage dc (HVDC) converters, but also fusion devices' power supplies. This converter, thanks to discrete-leveled output voltage and its identical submodules (SMs) by which it is composed, represents a promising alternative replace flywheel generator (FG) that actually provides electrical Axially Symmetric Divertor Experiment (ASDEX) Upgrade device's toroidal field...

A novel semiconductor circuit breaker based on SiC (silicon carbide) is introduced in this paper. It integrates an electronic power consisting of two anti-serial cascodes, a control unit with current, voltage and temperature measurement as well supply, making the switch fully self-sufficient. Each cascode composed high-voltage SiC-JFET (junction field effect transistor) or SiC-SIT (static induction low-voltage Si (silicon) - MOSFET (metal oxide transistor), resulting normally-off...

For automotive battery charging, the series-series compensated inductive power transmission shows a lot of advantages compared to other compensation techniques. As shown in many recent [1], [2] and older publications, main are independency secondary current from load at resonant frequency zero phase shift between primary voltage. [3], very high efficiencies grid nearly 94-95% can be reached by driving IPT-system constant adapting input output DC-link voltages. To achieve this control method,...

The rapid progress of power line communications (PLC) for data transmission over electric supply systems is now opening ways special applications such as train automation in local transportation and mass transit (MT) systems. These DC-powered traction networks can be used communication links between wayside equipment the moving trains. As MT significantly differ from usual electricity systems, usage existing models conventional PLC channels turns out infeasible. Therefore, work reported this...

This paper deals with modeling and control strategy for a dual active bridge (DAB) converter. The generalized average method is used to obtain the state-space representation of DAB, in which DC fundamental harmonic Fourier series expansion state variables are considered. Transfer functions from control-to-output determined, will be define two controllers output current voltage cascaded structure. Simulations experiments validate operation proposed method.

Implementing Power and Signal Dual Modulation (PSDM) should enhance the cost-effectiveness simplicity of Line Communication (PLC) systems. However, up to now this solution was verified for different converters topologies in latency-tolerant applications, which don't require high-speed data communication i.e., few kbps [1] [2], using low Switching Frequencies (SFs) kHz range [3] [9] encode binary '1' '0'. Yet, transmission bit rate is major concern PSDM systems [5]. Enhancing achieved by...

A Finite Control Set Model Predictive Controller (FCS-MPC) is developed and implemented in real time on a FPGA platform. The classical trajectory tracking cost function of this controller extended to include the inverter switching conduction losses explicitly. Depending phase current magnitude its direction, different combinations (IGBT turn on, IGBT off, diode reverse recovery) or diode) have been considered implementation. This approach aims reduce while keeping dynamic performance...

This paper presents a self-sustained and flexible decentralized control strategy for DC nanogrids in remote areas/islands without the need communication system. The proposed of nanogrid is based upon hierarchical which primary can manage balance current internal bus voltage while secondary restore deviation caused by droop operation. algorithm provides exchange power inside as well among various according to state charge (SoC) battery variation interconnecting any link. Experimental results...

Soft starters are a well-known solution for starting induction motors in industrial applications. With predictive algorithm approach the losses motor and soft starter can be lowered significantly. This article presents an which implemented devices with concomitant speed control option. is necessary to fit users requirements start-up. Besides control, characteristic behavior of analyzed detail. The suitability novel closed loop different representative applications proven by measurements discussed

Finite element method (FEM) based electromagnetic simulation is commonly used for low frequency problems such as motor and transformer design. But it rarely interference (EMI) filters design analysis. FEM EMI has a number of clear advantages in comparison with conventional approaches. It takes into account mutual couplings self-parasitics, dependency permeability can be easy included, values components quickly optimized. In this article procedure three-phase filter on supplemented analytical...

In this paper a comparison between grid-feeding and grid-supporting inverters is shown based on simulation measurement of inverter output impedances. The impedance with current control shows capacitive behavior compared to inductive voltage control.

This work considers the coupling effects between differential and common modes, which have an impact on conducted electromagnetic noise generated by variable speed drive supplied from DC grid of aircraft. Common mode noise, origins mode, was observed during EMI measurements at output shielded cable, due to asymmetry cable. It is shown, that such can exceed corresponding limit. The mixed scattering parameters are considered for study coupling. They were measured adopted Finally, they...

Accurate knowledge of inductances are essential for successfully achieving high performance a PMSM and applying sensorless control. This paper presents novel method offline measuring the differential static PMSM. For this purpose, frequency current signal is injected in d- q-axis, respectively. As result, at different operating points can be obtained. Experimental results demonstrate effectiveness proposed method.

An accurate real time parameter estimation of permanent magnet synchronous machines (PMSMs) is essential to achieve a high performance drive system. However, the accuracy affected by nonlinearity inverter. In this paper, an approach for identification based on model reference adaptive system (MRAS) with considering inverter proposed. Compared conventional compensation strategies, different turn-on and turn-off delay high- low-side IGBTs considered, which makes more accurate. With proposed...

This paper presents a new model predictive algorithm for induction motors driven by soft starter. The idea and equations that are used the calculation of system behaviour discussed in detail. Decision criteria introduced defined different aspects. Measurements classic start-ups done under load conditions then compared. Also, capabilities, advantages opportunities approach discussed.

This paper presents the impact of voltage fall time SiC MOSFETs, applied in converters aerospace DC fed AC drives, on a HF conducted EMI signals. Simple frequency domain behavioral model is proposed for use. Simulation results and real system measurements are successfully compared. It was shown that appropriate tuning MOSFET by means gate driver design allows to selectively suppress common mode noise high range. Associated filter showing such suggestion can be used compensate negative...