Review on Solid-State Transfer Switch Configurations and Control Methods: Applications, Operations, Issues, and Future Directions

M S Mollik,M Faisal,M S Hossain Lipu,P J Ker,M S A Rahman,M A Hannan,M Mansur

doi:10.1109/access.2020.3028870

M S Mollik, M Faisal + Show 5 more

Open Access

https://doi.org/10.1109/access.2020.3028870

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Abstract

Solid-state transfer switch (SSTS) becomes the most crucial technology for electric power transmission, distribution and control system. SSTS is useful in supplying the power to sensitive loads uninterruptedly and critical loads economically and efficiently. However, a few concerns could hamper the effectiveness of SSTS including voltage swell, sag, inappropriate structure, poor power factor and inefficient control methods. Hence, this paper comprehensively surveys the diverse SSTS topologies, applications, operations, issues, and future directions. The SSTS configuration, design, control system, benefits and shortcomings are discussed rigorously. A detailed comparative analysis of various SSTS are carried out concerning topologies, control operations and applications. In line with that, the different control models and schemes are narrated briefly. This paper also highlights existing challenges and issues before providing a few important future prospects to enhance the configuration and efficiency of SSTS. All the key information obtained from this review would be beneficial to the researchers and power system engineers to develop an advanced and efficient SSTS toward future performance enhancement.

Highlights

The types of disruptions that occur in a power system can be classified as problems related to the quality of electricity caused by voltage dips and surges, lightning strikes and other interferences associated with the system
The study provides a comprehensive idea of solid-state transfer switch (SSTS) configurations, control methods, applications, operations, issues, and future directions
Several literatures on existing topologies and control methods have been discussed in this paper to dispense beneficial information for SSTS

Summary

INTRODUCTION

The types of disruptions that occur in a power system can be classified as problems related to the quality of electricity caused by voltage dips and surges, lightning strikes and other interferences associated with the system. For conventional SSTS, thyristor starts switching when voltage distinction occurs between the two feeders and the load power factor. The voltage difference is measured in source 1 after that, the transmission process is initiated from feeder 1 to 2 This figure illustrates that, when the source 1 voltage decreases under VU, the controller sends a signal to the parallel switch (PSI) and a gate signal to the thyristors (TSI) at the same time. This TS2 is connected with opposite side thyristor which is TS1 At this time TS2 starts switching and it conducts current to the load from feeder 2. These logic sets are used for three-phase SSTS system It provides selective gating schemes for GTO switches, resulting in fast load transfer and preventing source parallelization [54]. If the transmission signal is low the preferred side switch turns on and the alternative side switch is off

SSTS CONTROL METHODS

SSTS SYSTEM STRUCTURE

Findings

CONCLUSION AND SUGGESTIONS