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The Governor Of Diesel Generator Set Must Meet The Conditions Of Stability

Aug. 22, 2022

The function of the Cummins diesel generator set governor is to automatically adjust the supply with the change of the external load of the diesel engine within the working speed range of the diesel engine, so as to keep the speed of the diesel engine basically stable. Cummins diesel generator set governor can be divided into four types: mechanical type, hydraulic type, pneumatic type and electronic type according to the different regulating mechanisms of the governor. In this article, Jiangsu Starlight Electricity Equipments Co.,Ltd. focuses on explaining to you that the governor of Cummins diesel generator set must meet the two major conditions for stability. Let's take a look.

 

1. When the speed of the Cummins diesel generator set deviates from the set value, the governor can make a corresponding reaction action, and at the same time, there must be a regular restoring force to restore the governor to the initial state. The spring in the centrifugal governor is the part that generates the restoring force. Such a governor is called a statically stable governor. But statically stable governors may also experience dynamic instability during regulation. When the adjustment action is excessive and reverse adjustment occurs, the actual adjustment action will form an oscillation process. A governor that can quickly decay the oscillation is called a dynamically stable governor. Otherwise it is a dynamically unstable governor, which cannot guarantee the normal operation of the machine.

 

diesel generator set


2. Adding damping to the adjustment system is one way to improve dynamic stability. The damping in the adjustment system, such as the friction in the kinematic pair, gives the governor a certain insensitivity. That is, when the speed of the controlled shaft slightly deviates from the set value, the governor does not act accordingly. The insensitivity of a mechanical governor is generally about 1% of its setting. A governor with too high sensitivity will also produce undue adjustment actions due to periodic speed fluctuations in the normal operation of the unit.

 

Jiangsu Starlight Electricity Equipments Co.,Ltd., as an OEM supporting manufacturer authorized by Cummins to provide Chinese diesel generator sets, has professional manufacturing technology, perfect quality management system and strong R&D technical strength. It can provide users with generator sets of various specifications from 15KW to 2500KW. It can also provide users with one-stop service of design, supply, debugging and maintenance at any time. welcome contact us by email sales@dieselgeneratortech.com.


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