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康亮机电

Kangliang Electromechanical Equipment Co., Ltd.

Rental of professional brand generator sets
康亮机电康亮机电

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东莞市康亮机电有限公司
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National Service Hotline: 136-7735-6587


Contact: Mr. Zhang


Phone: (0769) 87186846

186-8866-08l5 <Guangdong>

136-7735-6587 <National>

Address: Zhangyang Management Zone, Zhangmutou Town

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Good matching principle for diesel engine and generator

发表时间:2017-07-15 15:27:07 【 Popularity: 1093 Time: 2017-07-15 15:27:07 [Large Middle Small]
In order to ensure that the unit meets various technical indicators, the diesel engine and generator must be well matched when the unit is designed and manufactured, which includes both power and speed. The power of the diesel engine refers to the effective power that the diesel engine can normally operate at the rated speed for 12 consecutive hours. The power of the synchronous generator refers to the rated electric power obtained at the output terminals during long-term continuous operation at the rated speed. The ratio of the rated power (horsepower) of a diesel engine to the rated power (kw) of a synchronous generator is usually called the matching ratio. The unit used on the plain generally requires a matching ratio of 1.6: 1; for some mobile stations with higher requirements, the matching ratio is 2: 1. Speed matching requirements are also very strict. The speed is closely related to the power, frequency and voltage of the unit. Therefore, it is required that the diesel engine supporting the generator must have a governor with good performance and reliable operation to ensure that the generator is brought to a short time. Its rated speed and stable operation must also meet the requirements for speed regulation when the load changes.
Diesel generator

Unit operation:
Diesel generator sets can be operated by a single unit, or multiple units can be operated in parallel and integrated into the power system. The operation of a single unit is limited by many conditions: if its power meets the requirements of heavy-duty conditions, the economic efficiency of the unit will be reduced during light-load operation, and its standby unit must have the same capacity as the operating unit. The use of multiple units in parallel operation and integration into the grid operation can expand the power supply capacity and improve the reliability of power supply. One standby unit is sufficient, which reduces the capacity of the standby unit. To achieve parallel operation, the following four conditions must be met: ① the terminal voltages are equal; ② the frequencies are equal; ③ the phases are the same; ④ the phase sequence is the same. At the same time, there must be an operation protection device, which can automatically and reasonably allocate and adjust the active power and reactive power, so that the frequency-adjusting characteristics and voltage-adjusting characteristic curves between the units tend to be close.
Diesel generator features:
Compared with the steam turbine generator set, the diesel generator set has the following characteristics: ① The volume of output per unit is small, the weight is light, the system is simple, and it is generally a complete set. Therefore, the construction speed of diesel power stations is fast. ② The thermal efficiency of diesel engine power generation is high, and the fuel consumption per unit output does not change much under partial load or light load. ③Diesel generator sets have shorter start-up, load and shutdown time. It can start at any time and is more suitable as an emergency power source. ④The operation and maintenance of diesel generator set is simpler and more convenient than that of steam turbine generator set. However, diesel generators also have some disadvantages: ① only liquid fuel can be used, the price of fuel is more expensive, so the cost of electricity is higher. ②Diesel engine wears a lot, its life is short, and maintenance is frequent. Operating stability and overload capacity are inferior to steam power plants. ③ During the operation, the vibration and noise of the unit are large, and the operating conditions of the workers are poor. ④ The magnetic pole surface of the generator must be provided with a brake coil to facilitate the start and stop of the unit. 》 (GB-3096-82) The standard of the second-class area, after field test, it is ≤55dB (A) during the day and ≤45dB (A) at night. It has achieved the purpose of eliminating noise pollution.
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