Precautions for Power Factor Adjustment of Diesel Generators

Sep. 27, 2023

What do you think should be paid attention to when adjusting the power factor of diesel generators? Firstly, according to the power rate assessment requirements of the power supply department, secondly, it should not exceed the allowable rotor current, thirdly, the stator current should not exceed, and fourthly, if you want to reduce reactive power, reduce the excitation current and pay attention to the generator not entering the phase and not oscillating. For single machine generators, there is no problem of adjusting the power factor, as the prerequisite is to maintain an appropriate stable voltage of the generator. The power factor of a typical generator is between 0.8 (lagging) and 1, and you can adjust it within this range. Generally, the generator will not operate in phase.

Additionally, set the power factor according to your scheduling requirements. What do the active power, reactive power, and power factor of a generator mean? To put it more simply, there are three types of power: active power P, reactive power Q, and apparent power S. Phase difference between voltage and current（ Φ) The cosine of is called the power factor, denoted by the symbol cos Φ In numerical terms, the power factor is the ratio of active power to apparent power, i.e. cos Φ= P/S.

Three types of power and power factor cos Φ It is a right angled power triangle relationship: the two right angled edges represent active power and reactive power, while the diagonal edges represent apparent power. Square of active power+square of reactive power=square of apparent power. In three-phase loads, these three types of power always exist simultaneously, and the electricity generated by the engine must include these three types of power: apparent power S=1.732UI, active power P=1.732UIcos Φ (Power generated by doing work and heating), reactive power Q=1.732UIsin Φ (Establish the power of magnetic field to transport energy), power factor cos Φ= P/S (active power/apparent power), sin Φ= Q/S (reactive power/apparent power).

Since 1982, Dingbo Generator has been a generator set manufacturer qualified by the "National Internal Combustion Engine Quality Supervision and Inspection Center". The product quality has passed the IS09001 quality system standard certification. And obtained the qualification certificate for self-operated import and export. Over the years, Dingbo units have been widely used in all walks of life, and have won the network access qualification of the Ministry of Information Industry, the network access qualification of the Ministry of Radio and Television, the network access qualification of CNPC, the network access qualification of China Mobile, and the manufacturing qualification of marine units. In 2016, Dingbo was awarded the Certificate of Qualified Supplier of China Nuclear Power Group. Dingbo Generator has been cooperating with Shangchai Power for many years. In 2009, it became the OEM partner of Shangchai Power in China. Dingbo generator VOLVO unit ranks the top three in the Asia-Pacific sales volume, and is the core OEM partner of Sweden Volvo in the Asia-Pacific region. If any question please feel free to visit our website https://www.dieselgeneratortech.com/ or send email to sales@dieselgeneratortech.com.

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