Unit manufacturer parses the load characteristics of diesel generator sets

This is actually the load characteristics of synchronous generators because it is directly connected. Synchronous Generator Working Principle: After the rotor winding passes through the DC current provided by the rotating rectifier, a magnetic field is generated in the air gap between the stator, referred to as a rotor magnetic field or a main magnetic field. Then there is a load of the load or the armature winding, and a magnetic field is generated in this air gap because the load current flows, called a stator or armature magnetic field. The two magnetic fields in the air gap naturally form a synthetic magnetic field. The size of the synchronous generator output voltage and current is determined by it.
The main cause of changes in synthetic magnetic field is that the armature magnetic field varies depending on the nature of the load. This is called armature reactions: When the armature windings of the generator are one core inductive coil, when there is a pure resistive load, the potential of the windings and the current phase, the armature magnetic field and the rotor magnetic field, the synthetic magnetic field Nothing changes. Only when generator belt is loaded, the stator magnetic flux is required to absorb some armature magnetic fields in a saturated state, and the synthetic magnetic field is slightly reduced. The more load current is reduced.
If the armature winding is only pure inductive load, the current of the armature is hysteresis the potential 90 ° phase angle. The armature magnetic field generated by this current will form a cancellation effect on the rotor magnetic field to minimize the synthetic magnetic field and distorted. The output voltage of the generator is therefore lowered.
If only the pure capacitive load is connected to the armature winding, the current of the armature winding is longer than the top 90 ° phase angle due to the capacitance of the capacitor. The armature magnetic field formed by this current can enhance the rotor magnetic field, which allows the synthetic magnetic field to be enhanced, enhancing the output voltage of the generator.
The above analysis shows that the load of three different nature makes the synchronous generator to produce different armature reactions, thereby changing its output voltage. Mastering these laws, you can have better loads for diesel generator sets, allowing the unit to exert all the potential and provide excellent electrical energy.
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