A Novel Transient Current Limiter Based on Three-Phase Thyristor Bridge for Y-yg Transformers

Abstract

The transformer in flux current may be a transient current that happens in electrical devices has been charged. This current depends on completely different parameters probably the voltage magnitude, the switching on angle the permanent flux, the core physical phemeon characteristics, the primary circuit resistance, etc. To beat the issues arising owing to transients, these are required to be suppressed.In this paper, an easy and economical techniquie is conferred to limit the transient current of the Y-yg transformers. One amongst the most benefit of this technique is it doesn't would like any negative feedback circuit or activity unit. The tactic relies on a three-phase thyristors bridge single RL reactor with the individual phases of electrical device. Since the amount of thyristors is reduced, the voltage ripple, electrical losses and therefore the malfunction likelihood due to device failure is reduced significantly. The projected technique has been simulated by MATLAB simulation. It's shown that the projected method is a lot of economical for the transient current limitation of Y-yg transformers.

Performance Analysis of Transient Current Limiters in a Distribution System

“…inductance and L m is the charging inductance of the transformer), V TF is the forward thyristor voltage drop and V p is the crest plentifulness of the utility voltage. As shown in [16] the transient current of the three-stage transformer can be controlled by utilizing twelve thyristors of the arrangement TCL. Through these thyristors, considerable current of the loaded transformers flows.…”

“…SERIES TCL FOR THREE-PHASE Y-YG TRANSFORMER Transient current in circuit breaker results from any abrupt change in the magnetizing voltage. The transient current waveform consists of a large and long lasting AC component and harmonics [16]. The TCL, has a low resistance coil in order to gain better results.…”

“…The TCL, has a low resistance coil in order to gain better results. The series TCL connected to threephase breaker and primary side of three single-phase transformers operates in two modes, charging mode and discharging mode [16]. The present mathematical statement in charging mode is composed, as takes after [16].…”

A Fault Current Limiter Circuit to Improve Transient Stability in Power System

“…For the protection purpose of excessive fault current in power systems, conventional protection devices are installed, specifically at the high voltage substation area. The tripping of circuit breakers depends on overcurrent protection relay that has a response time delay that allows initial two or three fault current cycle to pass before getting activated [1]. The superconducting fault current limiter (SFCL) is innovative electric equipment, which has the capability to reduce fault current level within the first cycle of fault current [2].…”

An Approach to Voltage Quality Enhancement by Introduction of CWVM for Distribution System

“…Although much work has been done in the extraction and compensation of each common PQ disturbance, few compensation strategies for several VQ problems have been developed [2]. In fact, there is a tremendous need for such generalised compensation strategies because of high probability for finding several VQ problems existing at the same bus, the same feeder or at the same load [3][4][5][6][7][8][9]. On the other hand, a utility is likely to take sufficient measures that limit the interruptions due to voltage fluctuations.…”