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Due to increasing demand on adequate dynamic load modeling, aggregation algorithms for induction and synchronous motors are proposed in the literature for cases that the same types of motors are connected to a common bus. However, one problem remains unsolved: how to perform load aggregation with upstream motors if both induction and synchronous motors are(More)
In this article, a passive harmonic filter design scheme is proposed for offshore power distribution systems with subsea cables. Such an offshore system requires more reliable harmonic filters due to parallel resonance and the resultant large harmonic distortions in the system caused by subsea cables. The new passive harmonic filter design scheme is easy to(More)
Medium-voltage drives (MVDs) are increasingly used in oil field facilities for high-power electrical submersible pump (ESP) wells. The load filter remains to be a critical component in such applications. In this paper, a load filter design method for MVD applications in ESP systems is proposed, which is suitable for various types of MVDs and with different(More)
The arc flash hazard is related to electrical safety in work place and has gained much attention as part of the safety program for many facilities. An effective approach to reducing the arc flash hazard in existing industrial and commercial facilities is proposed in this paper. To illustrate the proposed approach and provide quantified results, computer(More)
Variable-frequency drives (VFDs) offer smooth and soft motor-starting characteristics. They are widely used in various industrial areas. In this paper, electrical parameters for induction motor starting using VFDs are derived mathematically using the equivalent circuit of induction motors. Factors that could significantly affect the motor-starting(More)
Venezuelan equine encephalitis virus (VEEV) has been responsible for hundreds of thousands of human and equine cases of severe disease in the Americas. A passive surveillance study was conducted in Peru, Bolivia and Ecuador to determine the arboviral etiology of febrile illness. Patients with suspected viral-associated, acute, undifferentiated febrile(More)
Power-system protection for oil-field distribution systems consists of protection for electrical submersible pump (ESP) installations and their upstream electrical circuits. In this paper, a comprehensive protective-device coordination and an arc-flash hazard analysis are conducted for a large oil-field distribution system. Various protection schemes are(More)
Reelin is an extracellular matrix (ECM) protein that is essential for neuron migration and positioning. The expression of reelin in multiple myeloma (MM) cells and its association with cell adhesion and survival were investigated. Overexpression, siRNA knockdown, and the addition of recombinant protein of reelin were used to examine the function of reelin(More)
Induction machines are most widely used in various industrial applications. Variable frequency drives (VFDs) provide flexibility in speed control and improve starting and operating performance of induction motors. However, investigation of induction motor starting with VFDs is not considerably carried out. In some cases motor performance is different from(More)