To understand the automatic control function of diesel generator sets, it is first necessary to know what parts the automatic control of diesel generator sets consists of:
The automatic control of diesel generator sets includes the regulation of no-load voltage, the automatic regulation of voltage and the protection of generator sets, etc. Their functions are respectively as follows:
1. Introduction to Automatic Voltage Regulation: The automatic voltage regulation of the generator is achieved through an automatic voltage regulator (AVR). When the output voltage of the generator rises, the excitation current of the generator is reduced through the AVR, causing the voltage to drop. Conversely, when the output voltage drops, the excitation current of the generator is increased through the AVR to raise the voltage and ensure voltage stability.
2. Introduction to no-load Voltage regulation: When the generator is no-load, the output voltage can be adjusted within a certain range by regulating the relevant potentiometer through AVR, generally 95% to 105% of the rated voltage.
3. The generator protection functions include the following
1. It can be achieved by installing current transformers and current relays, which are divided into two types: short-delay overload and long-delay overload.
Short-circuit protection is achieved through the electromagnetic tripping characteristic of the main switch. When a short circuit occurs at the load end, the main switch trips automatically.
3. Stator high-temperature protection: By loading a stator temperature sensor, an alarm is triggered and protection is provided when the stator temperature exceeds the set value.
4. Moisture-proof heating is achieved by installing a moisture-proof heater. When the generator set is in standby mode, the heater works to prevent the motor insulation from decreasing due to a humid environment.
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Post time: Oct-10-2025