© 2006 by Taylor & Francis Group, LLC
8-1
8
Testing of Synchronous
Generators
8.1
Acceptance Testing ..............................................................8-2
A1: Insulation Resistance Testing • A2: Dielectric and Partial
Discharge Tests • A3: Resistance Measurements • A4–A5: Tests
for Short-Circuited Field Turns and Polarity Test for Field
Insulation • A6: Shaft Current and Bearing Insulation • A7:
Phase Sequence • A8: Telephone-Influence Factor (TIF) • A9:
Balanced Telephone-Influence Factor • A10: Line-to-Neutral
Telephone-Influence Factor • A11: Stator Terminal Voltage
Waveform Deviation and Distortion Factors • A12: Overspeed
Tests • A13: Line Charging Capacity • A14: Acoustic Noise
8.2
Testing for Performance (Saturation Curves,
Segregated Losses, Efficiency) ............................................8-8
Separate Driving for Saturation Curves and Losses • Electric
Input (Idle-Motoring) Method for Saturation Curves and
Losses • Retardation (Free Deceleration Tests)
8.3
Excitation Current under Load and Voltage
Regulation..........................................................................8-15
The Armature Leakage Reactance • The Potier Reactance •
Excitation Current for Specified Load • Excitation Current for
Stability Studies • Temperature Tests
8.4
The Need for Determining Electrical Parameters ..........8-22
8.5
Per Unit Values ..................................................................8-23
8.6
Tests for Parameters under Steady State..........................8-25
Xdu, Xds Measurements • Quadrature-Axis Magnetic Saturation
Xq from Slip Tests • Negative Sequence Impedance Z2 • Zero
sequence impedance Zo • Short-Circuit Ratio • Angle δ, Xds, Xqs
Determination from Load Tests • Saturated Steady-State
Parameters from Standstill Flux Decay Tests
8.7
Tests To Estimate the Subtransient and Transient
Parameters .........................................................................8-37
Three-Phase Sudden Short-Circuit Tests • Field Sudden Short-
Circuit Tests with Open Stato