What are the advantages of quiet diesel generators?

Quiet diesel generators can reduce noise and are very popular in residential areas, hospitals and other places. Let's take a look at the ten maintenance advantages of quiet diesel generators.

1. mute diesel generator loss of magnetism maintenance

Loss of magnetization maintenance is a loss of magnetization defect maintenance in which the excitation current of the generator drops abnormally or disappears completely. It is composed of excitation low voltage Ufd(P), system low voltage, static impedance, TV disconnection and other criteria, which are automatically changed with the setting value of active power. Excitation low voltage Ufd(P) criterion and static stability impedance criterion are related to static stability gap, which can detect whether the generator loses static stability due to loss of magnetization. The statically stable impedance criterion operates at the statically stable gap after demagnetization.

2. quiet diesel generator over excitation maintenance

Overexcited maintenance refers to the maintenance of high magnetic density of iron core operation caused by frequency drop or high voltage of reactive generator. Overexcitation maintenance is divided into high and low fixed values. The low fixed value is announced by 5s fixed delay signal and dropping excitation voltage (the functions of dropping excitation voltage and current are not used yet), and the high fixed value is removed and eliminated by inverse time delay action. The upper limit of reverse time delay is 5 seconds and the lower limit is 200 seconds.

3. quiet diesel generator stator grounding maintenance

Generator stator ground fault maintenance, maintenance as a generator stator single-phase grounding defects by some fundamental zero sequence voltage and harmonic voltage three times in two parts, first harmonic zero sequence voltage maintenance machine tail end to 95% area of stator winding single-phase grounding, from the reflected power pattern in the zero sequence voltage principle, by the time t1 (3 s) list out the magnetic action in solution; Third harmonic voltage maintenance machine tail to 30% of the stator winding single-phase grounding defects, by generator neutral and machine end of the third harmonic principle, the time t2(5s) action on the signal. Both constitute 100% stator grounding maintenance. Maintenance with PT disconnection lock.

4. quiet diesel generator stator turn maintenance

Maintenance is composed of longitudinal zero-sequence voltage and defect classification in negative sequence direction criterion. PT disconnection blocking measures are set as the main maintenance of inter-turn, inter-phase short circuit and stator winding opening welding inside the generator. The defect component negative sequence direction criterion ends by detecting the negative sequence power flowing out of the generator. The longitudinal zero-sequence voltage criterion ends with the longitudinal 3U0 output from the 3PT open triangle winding directly connected to the generator neutral but not grounded. Maintenance stops at all times.

5. mute diesel generator out-of-step maintenance

Three impedance elements are selected for maintenance, and the number of sliders is detected and the orientation of the oscillation center is acknowledged through the track modification of impedance. In the case of short circuit defect, system oscillation, voltage circuit disconnection, etc., the maintenance shall not misoperate. Maintain general action on signal; When the oscillation center is inside the generator and transformer group, it is recommended that the tripping instruction be sent through T1 (0.5s) in maintenance section I to deactivate the magnetic field. When the oscillation center is outside the generator-transformer bank, it is recommended that the maintenance section II signal through T2 (2S). A current latching device is maintained to ensure that the current does not exceed the additional out-of-step opening current of the circuit breaker when the circuit breaker is disconnected.

Jiangsu Meao Power Technology Co., Ltd. focuses on the development and manufacture of diesel generator sets, and has accumulated rich experience in manufacturing and service in this field. As a professional generator manufacturer, MEAOPOWER attaches great importance to product development, innovation and service quality, and maintains close strategic cooperation with famous domestic and international enterprises such as Cummins, Perkins, Doosan, Yuchai, Weichai, Shangchai, Wuxi Wandi, Lillesomer, Stanford, Marathon and so on.