Working Characteristics and Principles of 800kw Diesel Generator Set

by Dieselgenerator Tech ***

In the vast world, there are many living beings. People have their own personalities, and the units also have their own personalities. What are the working characteristics and principles of the 800kw diesel generator set? The power system is the source of electricity for the normal operation of data. When the external mains power supply fails, it is necessary to use the diesel generator as a backup power source to continuously and reliably supply the data.As the demand for data and electricity continues to grow, the corresponding requirements for the stand-alone capacity of standby diesel generator sets, the number of units, and the higher and higher voltage levels, have also been proposed for infrastructure operation and maintenance workers. Higher requirements, so it is necessary to understand the basic structure and working characteristics of the 800kw diesel generator set.

1. Diesel engine system of 800kw diesel generator set.

The 800kw diesel generator set is a mechanical device that converts the chemical energy of diesel into mechanical energy, and then converts the mechanical energy into electrical energy. Its power generation principle is to drive the crankshaft of the diesel generator through other auxiliary power to make the piston move up and down on the top of the closed cylinder. When the piston moves from top to bottom, the cylinder intake valve opens, and the outdoor air enters the cylinder after being filtered by the air filter device to complete the intake stroke.When the piston moves from bottom to top, the intake and exhaust valves of the cylinder are closed. Under the upward squeeze of the piston, the gas volume is rapidly compressed, causing the temperature in the cylinder to rise rapidly, completing the compression stroke. When the piston reaches the top, the fuel filtered by the oil filter device is atomized and sprayed by the high-pressure fuel injector, and mixed with high-temperature and high-pressure air to burn vigorously. At this time, the gas volume expands rapidly, pushing the piston downward to do work.Each cylinder performs work sequentially in a certain order, and the thrust acting on the piston becomes the force that pushes the crankshaft to rotate through the connecting rod, thereby driving the crankshaft to rotate and complete the work stroke. After the work stroke is completed, the piston moves from bottom to top, the exhaust valve of the cylinder opens to exhaust, and the exhaust stroke is completed. The crankshaft rotates half a circle for each stroke. After several working cycles, the diesel engine set gradually accelerates the rotation work under the inertia of the flywheel.

2. Synchronous AC generator system of 800kw diesel generator set.

What is going on in the above process is the conversion of chemical energy and mechanical energy, so how is mechanical energy converted into electrical energy?Structurally, the synchronous alternator is coaxially installed with the crankshaft of the diesel generator, and the rotation of the 800kw diesel generator set drives the rotor of the generator to rotate. Because the magnet core of the power generator has residual magnetism, the armature coil cuts the lines of magnetic force in the magnetic field. According to the principle of electromagnetic induction, the generator will output the induced electromotive force, and the current can be generated through the closed load circuit.

3. Generator excitation system of 800kw diesel generator set.

As we all know, synchronous generators require DC current excitation. The power supply and its auxiliary equipment that supply the excitation current of the synchronous generator are collectively called the excitation system, which is generally composed of an excitation power unit and an excitation regulator. The excitation power unit provides excitation current to the rotor of the synchronous generator, and the excitation regulator controls the output of the excitation power unit according to the input signal and a given regulation criterion.

The excitation system provides an important role for the stable operation of the 800kw diesel generator set itself:(1) Adjust the excitation current according to the downstream load changes of the generator system to maintain the generator output voltage; (2) Control each power generation in the parallel system Reactive power output of the generator; (3) Improve the static stability and transient stability of the parallel operation of the generator; (4) Realize the large and small excitation limits according to the operating conditions of the 800kw diesel generator set; (5) When the 800kw generator set system internal In the event of a failure, the de-excitation operation is carried out autonomously to reduce the degree of failure loss.

The above is the working characteristics and principles of the 800kw diesel generator set introduced by Dingbo Power. If you want to know more about diesel generators, please contact us by email dingbo@dieselgeneratortech.com.