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What causes diesel generator voltage instability

发表时间:2017-12-22 Article source : Couch motor manufacturersPost time: 2017-12-22

When we use diesel generators, we inevitably create voltage instability. As a type of power generation equipment, diesel generators play an important role, so if there is a problem, it is very dangerous. So you have to solve problems such as voltage instability, so what should you do this time? In recent years, with the continuous development of various industries, the use of generator sets has become more and more frequent, especially the operation of large-scale projects and government units, requiring diesel generators to generate large power. As a result, the price of 250kW diesel generators has attracted much attention.

What causes diesel generator voltage instability

The performance of voltage instability of 250kW diesel generator is very obvious. It will appear at a high and low moment, and the dynamics of the whole Shandong Province can introduce you to several issues. The voltage is too high, there are generally four reasons: high speed, the air gap of the shunt reactor core is too large, the magnetic rheostat short circuit, and the coaster. For the four problems, the corresponding solutions are as follows: In the face of high speed problems, we only need Reduction of the opening of the hydrofoil by reducing turbine accessories.

The core of the reactor can be adjusted by changing the thickness of the core gasket. When the magnetic rheostat is short-circuited, it usually causes adjustment failure, and the short-circuit point is found in time and eliminated directly. Speeding is a more common problem. The thing to do is to emergency stop and then deal with the accident. Please note that regardless of the above problems, if you are not sure that you can solve these problems, you must find professional maintenance personnel in time to avoid affecting your work progress.

The voltage is too low, the cause of this problem is more, and everyone has described it. The original low speed of the motor is a more intuitive reason, and the treatment is relatively simple, directly adjusting the speed of the prime mover of the 250kW diesel generator to the rated value. The position deviation of the excitation electromechanical brushes generally refers to the non-center line position. The possible reason is that the spring pressure is insufficient. At this time, the brushes should be adjusted to the correct position to change and then adjust the pressure.

The resistance of the excitation circuit is too large, which can be solved by reducing the resistance of the rheostat. The small contact surface of the brush will not only cause the voltage to be too low, but also the problem of poor contact. At this time, we should not only consider the surface of the commutator, but also polish the abrasive cloth at low speed. In addition, breakdown of the rectifier diode can also cause voltage instability. Check for replacements in a timely manner.

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