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This paper proposes a predictive current mode control boost PFC converter adopting a novel active part switching technique to achieve both robust current shaping control to disturbances and high power conversion efficiency. This strategy consists of controlling the switching stop angle near the peak of the input voltage through the output voltage control and controlling the switching stop period near...
The paper deals with a series of issues relative to power quality in drive systems and the behavior of a load composed from a uncontrolled rectifier, chopper and a DC motor. A MATLAB-Simulink scheme was designed in order to study the possibility to eliminate the unwanted power-related effects from the system. An equipment having the role of active filter is modeled and studied. The active filter is...
This paper proposes a control method for torque response improvement in permanent magnet synchronous motors. In general, the torque response can be improved by using the inverter overmodulation range. However, in the overmodulation range, the performance of the auto current regulator (ACR) deteriorates significantly because disturbance components, which consist of low-order components, are fed back...
The performance evaluation of an adjustable space-vector (SV) PWM (SVPWM) strategy for open-winding (OW) permanent magnet synchronous machine (PMSM) (OW-PMSM) drives with common DC bus is presented. Different from modifying the conventional SVPWM algorithm, the proposed method is realized by reconstructing the voltage references for individual SVPWM module. No need of modification on a conventional...
A conventional Unified Power Quality Conditioner (UPQC) is a back-to-back shunt and series converters with a dc-link capacitor, requires 12 switches to resolve voltage and current related power quality issues. Recently a nine-switch UPQC (NS-UPQC) is proposed, but suffers with certain limitations like limited reference amplitude and phase shift, twice the rated dc-link voltage and increased stress...
This paper focus on specially designed DG based Power Quality Conditioner for Micro Grid applications. Three leg inverter coupled with solar PV with MPPT used as Compensator can be used for distinct DGs in the micro grid for power quality improvement of the entire system. Optimum control can be achieved to avoid detraction for voltage, current and Power flowing between Grid and DG. By adjusting power...
The presented article deals with various issues related to ‘Power Quality (PQ) problems’. One of the reason to get these kind of PQ issues were mainly due to intermittent power generation due to Distributed Energy Resources (DER). However, problem may also occurs in non linearites originated from power system, subsequently can often damage the system. All these issues can be addressed with the power...
Control of a three-phase inverter with neutral-line voltage injection is proposed to improve the output voltage waveform. This inverter consists of a main three-phase inverter and an auxiliary single-phase inverter; the main inverter acts in the 120-degree conduction mode and the auxiliary inverter behaves as a wave shaper with three times frequency of the main frequency. The main inverter converts...
In two-level PWM rectifiers, two common control strategies are respectively VOC (Voltage Oriented Control) and DPC (Direct Power Control). In high power applications, the converter performance may suffer seriously from the non-ideal characteristics of the sampling and control system. The effects of the non-ideal characteristics will be analyzed in this paper for classic VOC, DPC and PDPC (Predictive...
Usage of electricity is rapidly increasing. As it finds it's application in every field of human development. The primary and the most prevalent source of electricity is the fossil fuel which is notoriously known source of the global warming. Conversion of solar energy into electrical energy is one of the best solution to reduce fossil fuel consumption, thus keeping check on the global warming. Efficient...
In recent times, along with the growth of the solar energy extractions, the grid connected solar inverters are gaining more popularity. The huge deployment of solar inverters may reduce the power quality of utility grid, if they deployed without proper power quality measures. As per the IEEE 1547 standards, the current total harmonic distortion (THD) should not be more that 3 % at the point of common...
This paper presents a single stage SPV (Solar Photovoltaic) system using an adaptive novel control (ANC) Scheme. The SPV system includes SPV array, VSC (Voltage Source Converter), ripple filter, nonlinear loads and three-phase distribution network. As compared to two stage systems, a single stage SPV system is developed, resulting in depletion in cost, size, weight and an improved efficiency. The...
In this paper, active power decoupling using six switch rectifier with a built-in ripple port (inductive or capacitive or combination of both) to reduce the size of the E-cap is studied. The six switch rectifier is analyzed as a three-port converter: (i) AC source at the input port, (ii) a load at the DC output port, and (iii) an inductor or capacitor connected to the third port called ripple port...
This paper demonstrates the multifunction capabilities of a two stage grid interfaced solar photovoltaic (PV) system with a battery energy storage support (BESS). The maximum power extracted from the solar PV array through incremental conductance is fed to the grid and the load. The battery is incorporated in the system with a bidirectional converter performing charging and discharging operation to...
Thispaper represents solar photovoltaic (PV) array fed to cascaded H-bridge seven level converter system where maximum power point tracking (MPPT) is achieved bythe perturb and observe (P&O) control algorithm. To realize good feasibility and utilization of PV modules and to maximize the solar energy extraction, the viable control and modulation are instigated. Here, the control is realized using...
An interleaved boost power-factor corrector (PFC) with average current control is studied in this paper. It comprises two interleaved boost circuits connected in parallel and operated with average current control. The interleaved operation reduces the input current and output current ripples and also improves the circuit efficiency at light load condition. This paper analyzes the interleaved PFC pre-regulator...
This paper shows solar photovoltaic (PV) array fed to cascaded H-bridge nine level converter system where maximum power point tracking (MPPT) is achieved by the incremental conductance (INC) control algorithm. To have appropriate solution and utilization of PV modules and to maximize the solar energy extraction, the viable control and modulation are instigated. Here, the control is realized using...
This paper proposes a three-phase single stage power factor corrected (PFC) bridgeless modular zeta converter based switched mode power supply (SMPS) suited for welding applications demanding high current and low voltage at the output. Typically, for high-power welding applications, modular arrangement of converters is suggested to reduce the device rating and provide ease of power expandability as...
This paper proposes a grid integrated solar photovoltaic (SPV) system using a loop transfer recovery (LTR) based control technique. The maximum power is extracted by utilizing a perturb and observe (P & O) based technique to obtain the peak power from the SPV array under variable insolations. However, the switching sequences of the grid integrated voltage source converter (VSC) are controlled...
This paper proposes the control of 'the three phase grid connected solar PV (Photovoltaic) system based on the FS-NLMF (Fast Sparse-Normalized Least Mean Fourth). The system uses a photovoltaic (PV) array, VSI (Voltage Source Inverter), and nonlinear loads. In this system VSI is connected with PV array to avail the three-phase active power to the three phase grid. In three phase distribution feeder...
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