Thermal Generating Plants

Abstract

Kenneth H. Sebra Baltimore Gas and Electric Company 6.1 Plant Auxiliary System 6-2 Selection of Auxiliary System Voltages . Auxiliary System Loads . Auxiliary System Power Sources . Auxiliary System Voltage Regulation Requirements 6.2 Plant One-Line Diagram 6-3 6.3 Plant Equipment Voltage Ratings 6-3 6.4 Grounded vs. Ungrounded Systems 6-3 Ungrounded . Grounded . Low-Resistance Grounding . High-Resistance Grounding 6.5 Miscellaneous Circuits 6-3 Essential Services . Lighting Supply 6.6 DC Systems 6-4 125-V DC . 250-V DC 6.7 Power Plant Switchgear 6-4 High-Voltage Circuit Breakers . Medium-Voltage Switchgear . Low-Voltage Switchgear . Motor Control Centers . Circuit Interruption 6.8 Auxiliary Transformers 6-5 Selection of Percent Impedance . Rating of Voltage Taps 6.9 Motors 6-6 Selection of Motors . Types of Motors 6.10 Main Generator 6-6 Associated Equipment . Electronic Exciters . Generator Neutral Grounding . Isolated Phase Bus 6.11 Cable 6-7 6.12 Electrical Analysis 6-7 Load Flow . Short-Circuit Analysis . Surge Protection . Phasing . Relay Coordination Studies 6.13 Maintenance and Testing 6-8 6.14 Start-Up 6-8