A grid-connected photovoltaic (GCPV) system plays an important role in the development of green technology. However, generated (PV) power that is injected into grid causes instability system. Previous studies have shown quality for a three-phase thoroughly being discussed, but not single-phase Single-phase also contribute to low-voltage networks during high penetration as majority GCPV nowadays...

AIMS Transanal haemorrhoidal dearterialisation and mucopexy has evolved in recent years as a popular minimally invasive non-excisional surgery for symptomatic prolapsing haemorrhoids. The long-term outcome of this procedure however, remains to be established. We aim to analyse the long-term outcome of THD-mucopexy in the management of prolapsing haemorrhoids based on the evidence of a prospecti...

This paper deals with a method to detect the existence of an over-discharged cell in lithium-ion battery (LIB) pack by measuring total harmonic distortion (THD) rate voltage response. Over-discharge LIB reduces available capacity irreversible chemical reactions, resulting serious safety risks such as explosions. Even if only one exists pack, it accelerates decomposition other cells. In general,...

Purpose. Identify the motors efficiency decrease factor corresponding to various values of load-carrying ratio. Methods. Basing on onsite measurements power harmonic in 660V low voltage (LV) grids Vietnam underground mines, simulations have been done MATLAB and compared with mathematical models. Verifying data will be implemented Lab-measurements carried out pumping system reveal series decreas...

The spoke-type permanent magnet synchronous motor (PMSM), which is a general ferrite magnetic flux-concentrated motor, has low portion of reluctance torque at the total magnitude. Therefore, as way to increase torque, there double-layer PMSM that can maximize difference in inductance between d-axis and q-axis. However, PMSM, cogging ripple, harmonic distortion (THD) with main cause vibration no...

Abstract In this paper the frequency distribution of quantization error in coherent sampling of digitizers will be investigated. As the distribution of the quantization error affects the values of THD and SNR, it is relevant for a correct interpretation of THD and SNR of sine waves in coherent sampling. The distribution of the quantization error will be analyzed as a function of N, total number...

A fuzzy based three phase inverter with single DC source for grid connected photo voltaic (PV) system employing three phase transformer is presented in this paper. Space Vector Pulse Width Modulation (SVPWM) control scheme is effectively used to generate the appropriate switching sequences to the inverter switches. The intend of the fuzzy logic approach is to meet high quality output, minimum T...

Due to harmonics, sudden voltage dips and large fluctuating torque causes a great problem in the starting of large induction motor. Some times due to tripping of relay, equipment failure, surge, no load or overload motor voltage fluctuates resulting in the failure of motor starting. This paper discusses the solution of these problems by using soft starter technique. Soft starting of induction m...

This work presents a novel wound rotor synchronous machine with dampers with dual three-phase open-end stator windings. The aim of the proposed machine is to improve the power segmentation and the availability of the drive system. The mathematical model of this machine is presented in the Park reference frame. This machine is supplied by four 2-level inverters, where each inverter is dimensione...