Power Supply Devices and Systems of Relay Protection: 1st Edition (Paperback) book cover

Power Supply Devices and Systems of Relay Protection

1st Edition

By Vladimir Gurevich

CRC Press

260 pages | 230 B/W Illus.

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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

About the Author

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:

Subject Categories

BISAC Subject Codes/Headings:
TEC007000
TECHNOLOGY & ENGINEERING / Electrical
TEC008000
TECHNOLOGY & ENGINEERING / Electronics / General
TEC031020
TECHNOLOGY & ENGINEERING / Power Resources / Electrical