Abstract When influence coefficient (IC) method is used in rotor balancing, it is possible that serious errors could be resulted in unbalance determinations due to the contamination of measurements and IC matrix being ill-posed. In this study, the availability of least squares algorithm (LSA) and Tikhonov regularization (TR) is studied by error estimations of unbalance determination with consid...

− The study presented in this paper aims to develop a new method for active and reactive power balancing in a four-wire stand-alone microgrid (MG), which feds single phase loads. Two unbalance compensation controllers are used, for active and reactive powers. The compensation is based on a dump load (DL) and a static compensator (STATCOM), which ensure the balance of the active and reactive pow...

Rotor imbalances have a significant impact on the level of their vibration and reliability. Reduction rotor is achieved through static dynamic balancing that we propose to accomplish by virtual rigid rotors in two stages. At first stage mutual orientation parts calculated compensate couple unbalance. second values masses angular coordinates correction weights allow eliminating residual imbalanc...

The vibration originated from the rotor’s unbalance mass impacts on the current oscillation. When the rotor rotating at high speed, power amplifier circuit will be burned down by excessive vibration control current, and at the same time the excessive control force will be generated. The vibrating force transfers to frame, which causes the system vibration and influence the dynamic properties an...

Unbalance, fatigue crack and rotor-stator rub are the three common and important faults in a rotor-bearing system. They are originally interconnected each other, and their vibration behaviors do often show strong nonlinear and transient characteristic, especially when more than one of them coexist in the system. This article is aimed to study the vibration response of the rotor system in presen...

This paper presents a novel approach to determinethe power system stability using resistive superconducting faultcurrent limiter (SFCL) of an electric power grid (EPG). Inaddition, the electric railwaysystem has rapidly changing loadcharacteristics in time. An unbalance is generated owing to therapidly changing large single-phase loads. Subsequently, the unbalanced load causes an unbalanced tra...

1 This work was supported by MEXT/JSPS Grant-in-Aid for Scientific Research(C) Grant Number (22500071). Abstract Sensor networks consisting of nodes with limited battery power and wireless communications are deployed to collect useful information from the field. Gathering sensed information in an energy efficient manner is critical to operate the sensor network for a long period of time. LEACH ...

Reactive oxygen species (ROS), including superoxide anion, hydroxyl radicals and hydrogen peroxide, can be formed endogenously by incomplete reduction of molecular oxygen occurring during mitochondrial oxidative phosphorylation, or by interactions with exogenous sources. The antioxidant defense system, with its major enzymes Catalase, superoxide dismutase (SODs) and glutathione peroxidase (Gpx)...

Three-phase unbalance is an important power quality issue that can cause many negative effects to the power system. Effective mitigation and management of voltage unbalance will benefit from the knowledge of how the unbalanced sources contribute to the voltage asymmetry at the point of evaluation (POE). In this paper, a method is proposed to assess the overall unbalance contribution of the mult...

This paper presents a review study for hybrid intelligent optimization for operating solar generators in electric distribution system. A number of optimization techniques have been proposed in the literature review to solve optimization for solar generators in electric distribution system to meet the operational controls such as voltage drops, transmission limits, and voltage unbalance limits. ...