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Power Supply Devices and Systems of Relay Protection





ISBN 9781138075030
Published March 30, 2017 by CRC Press
260 Pages 230 B/W Illustrations

 
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Book Description

Power Supply Devices and Systems of Relay Protection brings relay protection and electrical power engineers a single, concentrated source of information on auxiliary power supply systems and devices. The book also tackles specific problems and solutions of relay protection power supply systems and devices, which are often not dealt with in the literature. The author, an experienced engineer with more than 100 patents, draws on his own experience to offer practical, tested advice to readers.

A Guide to Relay Protection Power Supply for Engineers and Technicians

The first chapter reviews the electronics and primary elements of the system, including transistors, thyristors, optocouplers, logic elements, and relays, and their principles of operation. This background gives staff who service relay protection power supply systems the necessary electronics knowledge to help them work more effectively with the equipment. The next chapters of the book then cover built-in digital protection relay power supplies, battery chargers, accumulator batteries, uninterruptible power supply, and characteristic features of auxiliary DC systems at substations and power plants. The final chapters discuss questions and problems that engineers and technicians may face. These include insulation problems, issues in auxiliary DC power supply such as voltage dips, and electromagnetic disturbances such as blackouts, spikes, and surges. The author also explains how to address them.

Suitable for beginners and experienced engineers alike, the book is written for those who work with relay protection systems and with AC and DC auxiliary power systems in power plants and substations. It combines theory and practical recommendations to provide a valuable reference on power supply devices and systems.

Table of Contents

Basic Components
Semiconducting Materials and p–n Junctions
The Transistor’s Principle
Some Types of Transistors
Bipolar Transistor General Modes
Transistor Devices in Switching Mode
Thyristors
Optocouplers
Electromagnetic Relays
References

Secondary Power Supplies

Introduction
Comparative Characteristics of Linear and Switch-Mode Power Supplies
Problems with Electrolytic Capacitors
Conclusions and Recommendations
References

Battery Chargers

Purpose and Modes of Operation of Battery Chargers
Arrangement and Principle of Operation of a Classical BC on Thyristors
BCs with a Function of Discharging the Battery
BCs with Two Rates of Output Voltage
Principle of Action of BC with a High-Frequency Link
Ferroresonant-Type BCs
Autoreclosing of a BC
A Problem of High Capacitance on BC Output Ports
Arrangement of Alarm about Failure of Transformers in Control Unit of BC
Problems of Electromagnetic Relays in BCs
A Device to Monitor Proper Ventilator Functionality in Sites with Batteries
References

Uninterruptable Power Supply

Diversity of Uninterruptable Power Supplies
Static Switch
Inverter
Group Powering of UPS
A Problem of Energy Quality in Networks with UPS
High-Voltage UPS Aggregate
Additional Problems of the UPS
Dynamic and Hybrid UPSs
References

LeadAcid Accumulator Batteries

Background
Principle of Lead–Acid Accumulator Operation
Effect of Electrode Sulfation on Accumulator Performance
Classification of Lead–Acid Accumulators
Types of Lead–Acid Accumulator Battery Plates
Types of Electrolytes
Dry-Charged Accumulator Batteries
The Capacity of an Accumulator Battery
Selection of an Accumulator Battery
References

Systems for Supervision of Substation Battery Continuity

Introduction
Existing System for Supervision of Substation Battery Continuity
Suggested Method for Supervision of Substation Battery Continuity
Device for Supervision of Battery Circuit Based on Nonlinear Shunt
Using a Standard Shunt as Current Sensor
Using the Hall-Effect Sensor in Systems for Supervision of Battery Circuits
Newest Developments and Prospects of Their Application
Conclusion
References

Backup of Substation DC Auxiliary Power Systems

Characteristics of Backup Layout with Diodes
DPR Protection Device
Automatic Reclosing Device for DCAPS
References

Insulation Problems in Substation DC Auxiliary Power Supply

Faulty Actuation of Relay Protection at Grounding of One of the Poles of Auxiliary DC Power Supply
Insulation Problems in Substation DCAPS
References

Voltage Disturbances in Auxiliary Power Supply

Electromagnetic Disturbances in the Power Network
Voltage Sags in AC Networks
Problematic Action of the Powerful Contactors as Changeover from Main to Reserved Auxiliary AC Power Supply on Substations
Problems in Auxiliary DC Power Supply
Voltage Dips in Auxiliary Power Supply Substation Systems
References

Index

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Author(s)

Biography

Vladimir I. Gurevich works at Israel Electric Corporation as an engineer specialist and head of a section of the Central Electric Laboratory. His past employment experience includes teacher, assistant professor, and associate professor at Kharkov Technical University, and chief engineer and director of Inventor, Ltd. He is the author of more than 150 professional papers and nine books and the holder of nearly 120 patents in the field of electrical engineering and power electronics. In 2006, he became an honorable professor with Kharkov Technical University. Since 2007, he has served as an expert with the TC-94 Committee of the International Electrotechnical Commission (IEC).

Dr. Gurevich’s books include: