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Showing posts from September, 2023

Write a blog post explaining the role of FACTS in enhancing the stability and reliability of electrical grids. Describe the various FACTS devices, including Static Var Compensation (SVC) Thyristor Controlled Series Compensatoes (CSC), Stanc Phase Shifters (SPS), Static Condensers (STATCON), Static Synchronous Series Compensators (SSSC), and Unified Power Flow Commlers (UPFC) Descuss how these devices contribute to grid optimization and power quality.

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 Static Var Compensation (SVC) A static VAR compensator is a parallel combination of controlled reactor and fixed shunt capacitor shown in the figure below. The thyristor switch assembly in the SVC controls the reactor. The firing angle of the thyristor controls the voltage across the inductor and thus the current flowing through the inductor. In this way, the reactive power draw by the inductor can be controlled. The SVC is capable of step less adjustment of reactive power over an unlimited range without any time delay. It improves the system stability and system power factor. Most commonly used SVC scheme are as follows. Thyristor controlled reactor (TCR) Thyristor-switched capacitor (TSC) Self Reactor (SR) Thyristor controlled reactor – Fixed capacitor (TCR-FC) Thyristor-switched capacitor – Thyristor controlled reactor (TSC-TCR) Advantage of Static VAR Compensator It increased the power transmission capability of the transmission lines. It improved the transient stability ...

Four Quadrant Operation Of Motor (Electrical Drive )

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  Four Quadrant Operation of DC Motor Four Quadrant Operation  of any drives or DC Motor means that the machine operates in four quadrants. They are  Forward Braking ,  Forward motoring ,  Reverse motoring  and  Reverse braking . A motor operates in two modes –  Motoring and Braking . A motor drive capable of operating in both directions of rotation and of producing both motoring and regeneration is called a Four Quadrant variable speed drive. In  motoring mode , the machine works as a motor and converts the electrical energy into mechanical energy, supporting its motion. In  braking mode , the machine works as a generator and converts mechanical energy into electrical energy and as a result, it opposes the motion. The Motor can work in both, forward and reverse directions, i.e., in motoring and braking operations. The product of angular speed and torque is equal to the power developed by a motor. For the multi-quadrant operation of driv...