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How to Handle Generator Oscillation?

Apr. 03, 2023

When a significant disturbance occurs to the generator, the active power balance between the generator and the operator will be damaged. This is because the generator rotor has rotational inertia, and the generator power needs a process of change. During this period, the power cannot be balanced, and the generator cannot operate stably, leading to oscillations. When oscillation occurs, the following measures should be taken:

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1. If the oscillation is caused by asynchronous paralleling or loss of excitation of the generator, the generator should be immediately disconnected;

2. If the oscillation is caused by an abnormality in the generator excitation regulator, immediately switch the generator fault excitation regulator to the standby excitation regulator for operation;

3. When the generator oscillates, the excitation current of the generator should be increased immediately without waiting for the command of the dispatcher to improve the reactive power output;

4. When the generator oscillates, if it is found that the frequency decreases, it should not wait for dispatching instructions, and increase the active output of the unit to the maximum value until the oscillation is eliminated.

5. When the generator oscillates, if it is found that the frequency increases, it should not wait for the dispatching command. Reduce the active output of the unit to reduce the frequency, but the frequency should not be lower than 49.5Hz. At the same time, ensure the normal power supply of auxiliary power.

6. Report to the dispatcher and listen to the waiting dispatcher's instructions.

Starlight would also like to remind everyone that for generators with oscillations, special attention should be paid to the heating condition and deformation degree of their rotors and stators, as well as the deformation degree of various components of the hydraulic turbine, in order to detect abnormalities in a timely manner.

Since 1982, Starlight 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, starlight 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, Starlight was awarded the Certificate of Qualified Supplier of China Nuclear Power Group. Starlight Generator has been cooperating with Shangchai Power for many years. In 2009, it became the OEM partner of Shangchai Power in China. Starlight generator VOLVO unit ranks the top three in the Asia-Pacific sales volume, and is the core OEM partner of Sweden Volvo 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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