Detailed Analysis Of The Core Electrical Control And Power Components Of Diesel Generator Sets (Part 2)

Detailed Analysis of the Core Electrical Control and Power Components of Diesel Generator Sets (Part 2)

1. Three Components of the Speed Regulation System: Speed Sensor, Speed Control Board, Actuator (Core of Speed/Frequency Control)

Detailed Breakdown of the Functions of Core Electrical Control and Power Components of Diesel Generator Sets (Part 1)

2. Speed Control Board (Electronic Speed Controller/Governor Board)

Equivalent to the control brain of the unit's rotational speed

- Receives two signals: real-time speed from the speed sensor, external start/stop or speed control commands;

- Logic operation: compares the current speed with the rated speed (1500 rpm/50 Hz, 1800 rpm/60 Hz);

- If the speed is too low: outputs a signal to drive the actuator to increase throttle;

- If the speed is too high: outputs a signal to reduce throttle;

- Additional functions: idle switching, soft start with gradual acceleration, deceleration shutdown protection, droop (active power sharing when paralleling);

- Supporting adjustments: panel potentiometers can fine-tune no-load speed, gain, and stability;

- Fault Symptoms: Severe speed fluctuations, unstable frequency, serious frequency drop under load, and uncontrolled shutdown.